JP2019178850A - Waste incineration method - Google Patents

Abstract

To provide a waste incineration method which enables combustion control to be quickly performed according to fluctuation in a moisture percentage of waste supplied to a waste incinerator even when the fluctuation occurs, and accordingly can maintain stable combustion condition favorably.SOLUTION: A combustion control step includes: a property measurement value acquisition step of acquiring a measurement value of property of charged waste; a calculation step of calculating a waste supply speed for maintaining a heat generation value of the waste supplied to a combustion chamber 3 by a supplying device 8 constant, on the basis of the measurement value of the waste property acquired in the property measurement value acquisition step; and a supply speed indication step of indicating reciprocation of an extrusion part 8A at the supply speed calculated in the calculation step to the supply device 8. The calculation step includes a step of calculating the supply speed of the waste, when the moisture percentage of the waste fluctuates, so that the supply heat generation value of the waste supplied to the combustion chamber per a unit time before the fluctuation is maintained.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a waste incineration method in which waste charged in a hopper is burned in a combustion chamber of a waste incinerator and steam is generated in a boiler by combustion heat.

  In recent years, interest in the recovery of thermal energy generated by incineration of waste in waste incinerators has increased, and the number of waste incinerators equipped with boiler power generation equipment driven by this thermal energy has increased. There is a demand for combustion operation that can achieve efficient heat recovery. On the other hand, as the regulation of environmental pollutants released from the waste incinerator into the atmosphere becomes stricter, there is a need for a combustion operation that reduces emission of harmful substances derived from combustion such as dioxins and nitrogen oxides.

  Thus, since advanced combustion operation control is desired for a waste incinerator, operation control that satisfies the above requirements is performed by an automatic combustion control device. In the automatic combustion control device, when the incinerator is a stoker-type incinerator, for example, the dust generation rate, grate feed rate, combustion air amount, cooling air amount, etc., which are the manipulated variables, are controlled to stabilize the amount of steam generated. In order to achieve the purpose of reducing the concentration of dioxins and nitrogen oxides in the exhaust gas and reducing the unburned components in the ash, the waste is operated to burn stably.

  However, such combustion control does not monitor the properties of the waste at the time of the introduction of the waste, and in any case, the temperature of the combustion gas generated as a result of combustion, the oxygen concentration in the combustion gas, the monoxide in the combustion gas These factors can be used to detect the carbon concentration, etc., or calculate the calorific value of the waste put into the incinerator based on the calorific value of the exhaust gas after combustion and the evaporation amount data in the boiler. Alternatively, each manipulated variable is feedback-controlled in accordance with the (calculated) calorific value, so that it becomes a follow-up type control, and the manipulated variable is immediately delayed without delay when the properties of the waste put into the incinerator fluctuate. Cannot be controlled, and stable operation control may not be performed.

  As described above, in the combustion control based on the feedback control method, it is difficult to cope with the sudden change in the property of the waste, so for example, when waste having a high moisture content and a very low calorific value is put into the furnace, The problem is that the combustion temperature in the furnace suddenly decreases without being able to respond quickly to fluctuations, and the steam generation amount in the boiler decreases, or the stability of combustion operation decreases and the concentration of harmful substances in the exhaust gas increases. Arise.

  As a major factor disturbing the stability of combustion operation of a waste incinerator, the amount of heat generated from the waste may fluctuate because the properties of the input waste are not constant. Since the properties of the waste that is put into the incinerator vary greatly depending on the area where the waste is collected, the time of collection, the weather, and the season, the calorific value of the waste varies greatly.

  Therefore, if it is possible to predict in advance the increase in the heat generation amount of the waste in the chute that passes before the waste is put into the furnace, the waste before the waste with the high heat generation amount is put into the combustion chamber. It is possible to perform feedforward control that suppresses the amount of steam generated, suppresses fluctuations in the amount of steam generated, suppresses excessive combustion, and suppresses an increase in nitrogen oxide concentration caused by the generation of a local high-temperature field.

  In addition, if it is possible to predict a decrease in the heat generation amount of the waste, the combustion air supply amount is increased so that the temperature in the combustion chamber rises before the waste with a low heat generation amount is put into the combustion chamber, and combustion is not performed. It is possible to perform feedforward control that suppresses the decrease in steam generation by suppressing the activation.

  As means for predicting the calorific value of waste in the chute, there are known a method for measuring the moisture content of the waste passing through the chute and a method for measuring the bulk density of the waste thrown into the chute. . Patent Document 1 proposes a control method for a waste incinerator in which the properties of waste to be introduced into a combustion chamber are obtained before being introduced, and combustion control is performed based on the properties of the obtained waste.

  Among the properties of waste, the factor that greatly affects the calorific value is the moisture content of the waste. In Patent Document 1, the moisture content in the waste is calculated from the measured capacitance value of the waste before combustion. A method is disclosed. Place a capacitance meter as a moisture meter in the middle of the chute hanging from the waste incinerator inlet to the combustion chamber, and measure the waste capacitance between a pair of electrodes. In order to get the moisture content of waste. The capacitance meter is connected to a moisture content calculator that has a correspondence relationship between the capacitance value and the moisture content, and the above correspondence relationship is obtained from the measured value measured by the capacitance meter. Based on this, the moisture content can be calculated.

JP2010-216990

  According to Patent Document 1, the amount of heat generated from waste is estimated from the calculated value of waste water content, and the amount of operation such as the dust feed rate, combustion grate feed rate, and combustion air amount is controlled accordingly. It is described that a stable combustion state can be obtained. However, although a method for measuring the moisture content is described, it is not clarified how combustion control is performed based on the obtained moisture content. Therefore, it is possible to accurately grasp the calorific value from the calculated moisture content of the waste, appropriately control the combustion of the waste incinerator against fluctuations in the calorific value, and operate the waste incinerator stably. It is not always possible.

  In view of such circumstances, the present invention can quickly perform combustion control according to the fluctuation even if the moisture content of the waste supplied to the waste incinerator fluctuates, and achieves a stable combustion state. Providing a waste incineration method that can be maintained, more specifically, grasping fluctuations in the calorific value of waste immediately before being supplied to the combustion chamber of the incinerator, and responding to fluctuations in the calorific value of waste It is an object of the present invention to provide a waste incineration method that enables stable operation of a waste incinerator by controlling the supply rate of waste so as to maintain a constant calorific value of waste supplied to the combustion chamber. .

  According to the present invention, the above-described problems are solved by a waste incineration method configured as follows.

A waste incineration method using a waste incinerator that burns waste supplied to a hopper via a chute in a combustion chamber and generates steam in a boiler,
A waste input process that intermittently inputs waste from outside into the hopper;
A waste supply step of pushing and supplying waste to the combustion chamber by reciprocating reciprocating motion of the extrusion section provided in the supply device;
A waste combustion step of supplying combustion air into the combustion chamber and combusting the waste in the combustion chamber;
A steam generation process for generating steam in the boiler by heat exchange with the exhaust gas from the combustion chamber;
In a waste incineration method comprising a combustion control step for controlling a waste feed rate by the feeding device based on a measurement value of the property of waste in a chute,
The combustion control step includes a property measurement value acquisition step of acquiring a property measurement value of the input waste,
Based on the measurement value of the waste property acquired in the property measurement value acquisition step, the waste supply rate for maintaining a constant amount of heat generated by the supply device to the combustion chamber is calculated. A calculation process;
A supply speed instruction step for instructing a supply device to reciprocate the extrusion unit at the supply speed calculated in the calculation step,
In the property measurement value acquisition step, for the input waste, the measurement value of the surface height of the waste in the hopper, the measurement value of the weight of the input waste, and the moisture content of the waste in the chute Is obtained as a measure of waste properties,
The calculation process is as follows:
Calculating the bulk density of the waste based on the measurement of the height of the surface of the waste and the measurement of the weight of the waste;
Obtaining a calorific value per unit weight based on the measured moisture content,
A step of calculating a calorific value of waste supplied to the combustion chamber per unit time as a supplied calorific value based on the following equation (1):
When the moisture content of the waste fluctuates, the number of reciprocations of the extrusion unit per unit time is calculated as the waste feed rate based on the following equation (1) so that the supply calorific value before the fluctuation is maintained. Having a process to perform,
A waste incineration method.
X = Q ・ M ・ S ・ T (1)
X: Supply calorific value per unit time (MJ / h)
Q: calorific value per unit weight (MJ / kg)
M: Bulk density (kg ^{/ m} 3)
T: Volume of waste supplied by a single supply operation of the supply device (m ³ / time)
S: The number of reciprocations of the extrusion unit per unit time as the supply speed (times / h)

  In the present invention, even if the moisture content of the waste to be charged fluctuates, the speed of waste supply to the combustion chamber, that is, per unit time of the extrusion unit of the supply device, is always satisfied so that the above equation (1) is satisfied. By calculating the number of reciprocations at, the amount of heat generated by the waste supplied to the combustion chamber is kept constant, and the waste incinerator can be stably operated.

  As described above, in the present invention, the waste supply rate to the combustion chamber, that is, the number of reciprocations per unit time of the push-out unit of the supply device is calculated so that the above equation (1) is always satisfied. Therefore, even if the moisture content of the waste to be input fluctuates, the calorific value (supplied calorific value) of the waste supplied to the combustion chamber is maintained constant. Therefore, stable operation of the waste incinerator is possible, and the amount of generated steam can be kept constant.

It is a schematic structure figure showing a waste combustion furnace concerning an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a schematic configuration diagram illustrating a waste combustion furnace according to an embodiment of the present invention. The waste combustion furnace according to this embodiment is a grate-type waste incinerator having a grate having a continuous structure (24 hours continuous operation), and a hopper 1 into which waste is intermittently charged from the outside, A chute 2 hanging from the hopper 1, a combustion chamber 3 for burning waste supplied via the chute 2, and primary combustion air for supplying primary combustion air into the combustion chamber 3 from below Air supply means 4, secondary combustion air supply means 5 for supplying secondary combustion air to the secondary combustion region on the downstream side of the combustion chamber 3, and heat from the exhaust gas received from the combustion chamber 3 A boiler 6 that generates steam by replacement and a control device 7 that controls the amount of operation at the operation end based on the measured value of the property of the waste in the chute 2 are provided. A secondary combustion region is formed in the vicinity of the inlet of the boiler 6.

  The hopper 1 receives waste thrown by a crane (not shown). A supply device 8 for supplying waste to the combustion chamber is provided below the chute 2 connected to the hopper 1. The supply device 8 has an extruder 8 </ b> A as an extruding unit capable of repeating the reciprocating motion for extruding waste and supplying it into the combustion chamber 3. In the present embodiment, the supply amount of waste into the combustion chamber 3 is adjusted by adjusting the waste supply speed by the extruder 8A, in other words, the number of reciprocations of the extruder 8A per unit time. It has become.

  A moisture content measuring device 9 as a moisture content measuring means for measuring the moisture content of waste in the chute 2 is provided on the side wall of the chute 2. Various methods can be adopted as the moisture content measuring device 9, for example, a transmission microwave intensity method, a contact microwave intensity method, a contact capacitance method, a transmission capacitance method, an infrared intensity. The method etc. are mentioned.

  For example, the transmission-type microwave intensity method is a method in which the transmitted microwave is transmitted through the waste, and the moisture content of the waste is measured from the attenuation rate of the received microwave, and the range of waste that can be measured is widened. Since it can be ensured, it is suitable for the measurement when the moisture content is unevenly distributed like the waste in the chute.

  In the transmission-type microwave intensity method, a transmission-type microwave intensity moisture meter as the moisture content measuring device 9 includes a microwave transmission unit, a reception unit, and a moisture content calculator connected to the reception unit. is doing. The transmitting unit is installed on one wall surface of the chute 2, and the receiving unit is installed on the other wall surface of the chute 2. Since the microwave has a characteristic of being absorbed by moisture, the microwave emitted from the transmitter is attenuated by moisture in the waste and reaches the receiver when passing through the waste. In the transmission microwave intensity moisture meter, the moisture content contained in the waste can be calculated based on the attenuation rate of the microwave.

  Specifically, the transmission-type microwave intensity moisture meter has an intensity ratio (or intensity difference) between the transmission microwave intensity of the transmission unit and the reception microwave intensity at the reception unit, that is, the reception unit for the transmission voltage at the transmission unit. The voltage ratio (or voltage difference) of the received voltage at is obtained as an attenuation rate (or attenuation amount) when the microwave has passed through the waste. The moisture content calculator previously stores the correlation between the attenuation rate of the microwave and the moisture content of the waste as a relational database, and is obtained as the actually measured voltage ratio by referring to the relational database. The moisture content of the waste is calculated from the above attenuation rate. The moisture content calculator is connected to a property measurement value acquisition / calculation unit 20 described later of the control device 7, and the moisture content of the waste calculated by the moisture content calculator is sent to the property measurement value acquisition / calculation unit 20. Is transmitted.

  Further, when the contact-type capacitance method is adopted as the moisture content measuring device 9, the contact-type capacitance moisture meter as the moisture content measuring device 9 includes a contact-type capacitance-type capacitance meter and the static capacitance meter. And a moisture content calculator connected to the capacitance meter. The capacitance meter measures the capacitance of the waste in the chute 2, and the moisture percentage calculator calculates the capacitance from the correlation between the capacitance of the waste held in advance and the moisture percentage. It is possible to calculate the moisture content corresponding to the measured capacitance value by a meter. Specifically, the moisture content calculator maintains a relational database in which the correlation between the capacitance of waste and the moisture content of waste is measured and clarified in advance, and is sent from the capacitance meter. The measured moisture content of the waste is collated with the relationship between the capacitance and moisture content in the relational database, and the measured moisture content of the waste is calculated. The moisture content calculator is connected to a waste property measurement value acquisition unit 20 described later of the control device 7, and the moisture content of the waste calculated by the moisture content calculator is transmitted to the property measurement value acquisition unit 20. Is done.

  Further, a waste level meter 10 for measuring the height (level) of the surface of the waste in the hopper 1 is provided at the upper part of the hopper 1.

  Below the combustion chamber 3, there are provided grates 11a, 11b, 11c, and 11d that move the waste in the combustion chamber 3 to the downstream side. The grate 11a-11d reciprocates to move the waste and also stir the waste. Hereinafter, for convenience of explanation, the grate 11a to 11d will be collectively referred to as “grate 11” as necessary.

  The primary combustion air supply means 4 has wind boxes 13a, 13b, 13c, and 13d below the grate 11a, 11b, 11c, and 11d, respectively, and supplies primary combustion air into the combustion chamber 3 from below. To do. The dust on the grate 11 moves on the grate 11 and becomes ash after being dried, burned, and post-combusted by the primary combustion air, and discharged to the outside from the ash drop opening 18. The primary combustion air is supplied into the combustion chamber 3 by the primary combustion air blower 14 from below the grate 11a to 11d via the wind boxes 13a to 13d. Further, the amount of primary combustion air is adjusted by a damper 15 provided in a pipe that supplies the primary combustion air. The amount of primary combustion air supplied to each of the wind boxes 13a to 13d is the amount of damper 15a, 15b provided in each pipe that supplies the primary combustion air to each of the wind boxes 13a, 13b, 13c, 13d. , 15c, 15d.

  The secondary combustion air supply means 5 supplies the secondary combustion air to the secondary combustion region in the vicinity of the inlet of the boiler 6 on the downstream side of the combustion chamber 3. The secondary combustion air is supplied to the secondary combustion region by the combustion secondary air blower 16. The amount of secondary combustion air is adjusted by a damper 17 provided in a pipe that supplies the secondary combustion air to the secondary combustion region. By supplying the secondary combustion air to the secondary combustion region, the combustible gas in the combustion gas that could not be combusted in the combustion chamber 3 is completely burned.

  The exhaust gas after the secondary combustion is recovered by heat exchange in the boiler 6 on the downstream side, further subjected to exhaust gas treatment, and then discharged to the outside through the chimney 19.

  The control device 7 controls the operation amount at the operation end based on, for example, PID control based on the measurement value of the property of waste in the chute 2. In the combustion control in the present embodiment, the waste supply amount into the combustion chamber is set as the control amount. The operation end corresponding to the waste supply amount is the extruder 8A of the supply device 8. That is, the operation amount at the operation end corresponding to the waste supply amount is the number of reciprocations per unit time of the extruder 8A, in other words, the waste supply speed. As shown in FIG. 1, the extruder 8 </ b> A as the operation end is controlled by a supply speed instruction unit 22 described later of the control device 7.

  The control device 7 obtains the waste input amount (weight), the height of the waste surface in the hopper 1, and the property measurement value for obtaining the moisture content of the waste in the chute 2 as the measurement values of the waste properties. Based on the measurement value of the property of the waste calculated by the acquisition unit 20 and the property measurement value acquisition unit 20, the heating value of the waste supplied to the combustion chamber 3 by the extruder 8A is kept constant. The calculation unit 21 calculates a waste supply rate, and the supply rate instruction unit 22 instructs the supply device 8 to operate at the supply rate calculated by the calculation unit 21.

  The property measurement value acquisition unit 20 acquires the measurement value of the waste level meter 10, that is, the height of the surface of the waste in the hopper 1 when the waste is thrown into the hopper 1. In addition, the property measurement value acquisition unit 20 acquires a waste input amount (weight). Here, the amount of waste input is measured by, for example, a weight meter (not shown) provided in the crane when the waste is input to the hopper 1. Furthermore, the property measurement value acquisition unit 20 acquires the moisture content of the waste from the moisture content measuring device 9.

  The calculation unit 21 adds the cross-sectional area of the hopper 1 (the area of the horizontal shape) to the increase in the height of the surface of the waste when the waste is input into the hopper 1, which is acquired by the property measurement value acquisition unit 20. ) To calculate the volume of waste put into the hopper 1. Next, the calculation unit 21 calculates the bulk density of the waste thrown into the hopper 1 by dividing the waste thrown amount by the waste volume.

  In addition, the calculation unit 21 holds a correspondence relationship between the moisture content of waste and the calorific value per unit weight as a relational database in advance, and is acquired by the property measurement value acquisition unit 20 by referring to the relational database. The calorific value per unit weight corresponding to the moisture content is obtained from the moisture content of the waste.

Further, the calculation unit 21 sets the calorific value (MJ / kg) per unit weight obtained as described above to Q, sets the bulk density (kg / m ³ ) of the waste obtained as described above to M, and supplies 8 The volume of waste (m ³ / time) supplied by one supply operation (extrusion operation of the extruder 8A) is T, and the number of reciprocations of the extruder 8A per unit time as the waste supply speed ( When the number of times / h) is S, a calorific value (supplied calorific value) X of waste supplied to the combustion chamber 3 per unit time is calculated based on the following equation (1). Here, the calorific value Q per unit weight is obtained every time control is performed because the moisture content of the waste fluctuates, and the bulk density M of the waste is determined when the waste is thrown into the hopper. The volume T of waste that is calculated and supplied by one extrusion operation of one extruder 8A is a predetermined value.
X = Q ・ M ・ S ・ T (1)

  The supply speed instruction unit 22 instructs the supply apparatus 8 to operate at the supply speed S used in the above equation (1) (reciprocating motion of the extruder 8A). Specifically, the number of reciprocations of the extruder 8A per unit time as the supply speed is transmitted to the supply device 8 as instruction information, and the amount of waste supplied to the combustion chamber 3 is controlled by feedforward control.

  When the moisture content of the waste fluctuates during operation of the waste combustion furnace, the calculation unit 21 refers to the relational database, and a unit corresponding to the changed moisture content obtained by the property measurement value obtaining unit 20 A new calorific value Q per weight is obtained. Then, the calculation unit 21 newly calculates the heat generation amount Q and the (1) so that the supply heat generation amount X is maintained at the same supply heat generation amount as the supply heat generation amount X calculated before the fluctuation of the moisture content. ) To newly calculate the waste supply speed S, that is, the number of reciprocations of the extruder 8A per unit time. The supply speed instruction unit 22 instructs the supply device 8 to reciprocate the extruder 8 </ b> A at the supply speed S newly calculated by the calculation unit 21.

  In this embodiment, the distance (m) from the moisture content measurement position (position of the moisture content measuring device 9) in the chute 2 to the position of the supply device 8 is H, and the waste descent speed (m / When s) is V, the control of the extruder 8A which is the operation end is such that the waste whose moisture content is measured is H / V seconds after the time when the moisture content is measured. Is reached by adjusting the waste supply rate S. By performing feedforward control at such timing, combustion control according to fluctuations in moisture content can be performed more accurately.

  Next, the point of the combustion control in this embodiment is demonstrated. First, the property measurement value acquisition unit 20 measures the height of the surface of the waste in the hopper 1 measured by the waste level meter 10, the amount of waste input (weight) and the moisture content measured by the crane weigh scale. A measured value of the moisture content of the waste is obtained from the measuring device 9.

  As described above, the calculation unit 21 calculates the bulk density M of the waste based on the increase in the height of the waste surface, the cross-sectional area of the hopper 1 and the amount of waste input. Moreover, the calculating part 21 calculates | requires the emitted-heat amount Q per unit weight corresponding to this measured value from the measured value of the moisture content of a waste with reference to a relational database. Further, the calculation unit 21 calculates the supply heat generation amount X based on the equation (1) using the bulk density M, the heat generation amount Q, the supply speed S, and the volume T.

  The supply speed instruction unit 22 instructs the supply apparatus 8 to reciprocate the supply speed (S) used in the above equation (1), that is, the reciprocation of the extruder 8A per unit time, to the combustion chamber 3. Control the amount of waste supply.

  When the moisture content of the waste varies, the calculation unit 21 newly obtains the calorific value Q per unit weight corresponding to the moisture content after the variation with reference to the relational database. Then, based on the newly determined calorific value Q and the equation (1) so that the supplied calorific value X is maintained at the same calorific value as the supplied calorific value X calculated before the change in moisture content, A waste supply rate S is newly calculated. The supply speed instruction unit 22 instructs the supply device 8 to reciprocate at the supply speed S newly calculated by the calculation unit 21.

  As described above, in the present embodiment, the waste supply speed to the combustion chamber 3, that is, the number of reciprocations per unit time of the extruder 8 </ b> A of the supply device 8 is calculated so that the above expression (1) always holds. Therefore, even if the moisture content of the waste to be input fluctuates, the heat generation amount of the waste supplied to the combustion chamber 3 is kept constant. Therefore, stable operation of the waste incinerator is possible, and the amount of generated steam can be kept constant.

  In this embodiment, when the moisture content of the waste fluctuates, so-called feedforward control is performed in which the number of reciprocations per unit time of the extruder 8A is controlled before the waste is actually incinerated. Combustion control according to fluctuations in the moisture content of the object can be performed quickly. Therefore, the supply calorific value of the waste due to a sudden change in the moisture content of the waste can be suppressed without causing a time delay, and a stable combustion state can be satisfactorily maintained.

DESCRIPTION OF SYMBOLS 1 Hopper 2 Chute 3 Combustion chamber 6 Boiler 7 Control apparatus 8 Supply apparatus 8A Extruder (extrusion part)
20 property measurement value acquisition unit 21 calculation unit 22 supply speed instruction unit

Claims (1)

A waste incineration method using a waste incinerator that burns waste supplied to a hopper via a chute in a combustion chamber and generates steam in a boiler,
A waste input process that intermittently inputs waste from outside into the hopper;
A waste supply step of pushing and supplying waste to the combustion chamber by reciprocating reciprocating motion of the extrusion section provided in the supply device;
A waste combustion step of supplying combustion air into the combustion chamber and combusting the waste in the combustion chamber;
A steam generation process for generating steam in the boiler by heat exchange with the exhaust gas from the combustion chamber;
In a waste incineration method comprising a combustion control step for controlling a waste feed rate by the feeding device based on a measurement value of the property of waste in a chute,
The combustion control step includes a property measurement value acquisition step of acquiring a property measurement value of the input waste,
Based on the measurement value of the property of the waste acquired in the property measurement value acquisition step, the supply rate of the waste for maintaining the heat generation amount of the waste supplied to the combustion chamber by the supply device constant is calculated. A calculation process;
A supply speed instruction step for instructing a supply device to reciprocate the extrusion unit at the supply speed calculated in the calculation step,
In the property measurement value acquisition step, for the input waste, the measurement value of the surface height of the waste in the hopper, the measurement value of the weight of the input waste, and the moisture content of the waste in the chute Is obtained as a measure of waste properties,
The calculation process is as follows:
Calculating the bulk density of the waste based on the measurement of the height of the surface of the waste and the measurement of the weight of the waste;
Obtaining a calorific value per unit weight based on the measured moisture content,
Based on the following equation (1), calculating a calorific value of waste supplied to the combustion chamber per unit time as a supplied calorific value;
When the moisture content of the waste fluctuates, the number of reciprocations of the extrusion unit per unit time is calculated as the waste feed rate based on the following equation (1) so that the supply calorific value before the fluctuation is maintained. Having a process to perform,
A waste incineration method.
X = Q ・ M ・ S ・ T (1)
X: Supply calorific value per unit time (MJ / h)
Q: Calorific value per unit weight (MJ / kg)
M: Bulk density (kg / m ³ )
T: the volume of waste to be fed by a single supply operation of the supply device (m 3 ^/ dose)
S: The number of reciprocations of the extrusion unit per unit time as the supply speed (times / h)

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