JPH11315509A - Asphalt pavement waste material recycling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably control the temperature of hot air or an amount of hot air sent into a drum to make it possible to stabilize the temperature of a heated waste material. SOLUTION: A hot air thermometer 12 and a static pressure sensor 17 are arranged around a combustion chamber 4, a waste material thermometer 10 is provided to a heated waster material discharge section 9 of a drum 1 and an exhaust gas thermometer 11 is mounted to an exhaust discharge section of the drum 1. An amount of combustion of a burner 3 is controlled by a burner combustion controlling device 19 based on a detection temperature of the hot air thermometer 12 to keep the temperature of hot air sent into the drum 1 in constant. An opening of a return damper in a circulating stack 15 is adjusted by a static pressure controlling device 21 based on detected static pressure of the static sensor 17 to maintain the static pressure in the combustion chamber 4 in constant. The temperature of exhaust gas as the target to be controlled is set on the basis of difference between heated waste material temperature detected by the waste material thermometer 10 and waste material temperature set point, and an opening of a stack damper 18 in an exhaust stack 6 is adjusted by exhaust gas temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt pavement waste material recycling apparatus capable of heating and regenerating asphalt pavement waste material generated by road construction or the like.

[0002]

2. Description of the Related Art Conventionally, an asphalt pavement waste material recycling apparatus for heating and recycling road pavement waste material (hereinafter referred to as "waste material") has
As shown in FIG. 4, a hot hopper 2 of a cylindrical drum 1 is provided.
The hot air generated in the combustion chamber 4 by the burner 3 disposed on the side is sent into the drum 1 and is sucked and discharged by the exhaust fan 7 disposed downstream of the exhaust flue 6 disposed on the cold hopper 5 side. While maintaining the flow, the waste material is fed into the drum 1 by the bucket conveyor 8 disposed on the hot hopper 2 side, and the waste material is brought into contact with the hot air in the drum 1 to increase the temperature to a desired temperature. Is discharged from the heated waste material discharge section 9 disposed in the first place.

[0003] The burner combustion control in the above-mentioned apparatus is carried out by increasing or decreasing the combustion amount of the burner 3 in order to maintain the waste material temperature detected by the waste material thermometer 10 provided in the heated waste material discharge part 9 at a set temperature. Alternatively, control is performed to control the combustion amount of the burner 3 so as to maintain the exhaust gas temperature detected by the exhaust gas thermometer 11 at the set temperature.

[0004] Further, when the waste material is heated at a high temperature, inconveniences such as deterioration of the asphalt component occur, so that the temperature of the hot air sent into the drum 1 needs to be suppressed to, for example, about 600 ° C. Hot air thermometer 12
The opening degree of the return damper 16 of the circulating flue 15 is adjusted based on the hot air temperature detected by the control device to control the hot air temperature to an appropriate value.

Further, the opening of the flue damper 18 downstream of the exhaust flue 6 is adjusted based on the static pressure detected by a static pressure sensor 17 disposed near the combustion chamber 4, and the static pressure near the combustion chamber 4 is adjusted. The appropriate amount of gas is sucked by the air blower 7 so as to keep the pressure slightly lower than the atmospheric pressure so as to prevent extra air from being sucked through the gap near the combustion chamber 4 and to prevent hot air from blowing out from the gap. I am trying to do it.

[0006]

However, if the burner combustion amount is directly controlled based on the heating waste material temperature or the exhaust gas temperature as in the above-described conventional control, there is a difference between the detected heating waste material temperature or the exhaust gas temperature and the set value. Burner 3 immediately
Since the combustion amount of the burner 3 increases and decreases, the combustion amount of the burner 3 fluctuates greatly and becomes unstable. Although the temperature of the hot air sent into the drum 1 is controlled by adjusting the opening of the return damper 16 of the circulation flue 15, the temperature of the hot air sent into the drum 1 is also stabilized because the combustion amount of the burner 3 is not stable. And the amount of hot air is difficult to stabilize. As described above, in the conventional method, there is a problem in control, and it is difficult to stabilize the hot air temperature and the amount of the hot air, which has a considerable influence on the stabilization of the temperature of the heated waste material.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide an asphalt pavement waste material recycling apparatus which stably controls the temperature and amount of hot air sent into a drum to stabilize the temperature of the waste material to be heated. And

[0008]

According to the present invention, there is provided an asphalt pavement waste material regenerating apparatus according to the first aspect of the present invention, wherein a combustion chamber is provided at one end of a drum for heating and regenerating asphalt pavement waste material. In the asphalt pavement waste material regenerating apparatus, a burner provided with is disposed, and an exhaust flue is disposed on the other end side, and a circulating flue provided by branching the exhaust flue and connecting to the combustion chamber. A burner combustion control for arranging a hot air thermometer and a static pressure sensor in the vicinity of the combustion chamber and a waste material thermometer in a heated waste material discharge portion of the drum, and controlling a burner combustion amount based on a temperature detected by the hot air thermometer. A device, a static pressure control device that adjusts the opening of the return damper of the circulating flue based on the static pressure detected by the static pressure sensor, and an opening of the flue damper of the exhaust flue based on the temperature detected by the waste material thermometer Adjust the hot air volume It is characterized by comprising a control device.

According to a second aspect of the present invention, there is provided an asphalt pavement waste material recycling apparatus, wherein a hot air thermometer and a static pressure sensor are provided near a combustion chamber, and an exhaust gas thermometer is provided at an exhaust gas discharge portion of a drum. A burner combustion controller that controls the amount of combustion of the burner based on the temperature detected by the gauge, a static pressure controller that adjusts the opening of the return damper of the circulation flue based on the static pressure detected by the static pressure sensor, and exhaust gas temperature A hot air volume control device is provided for adjusting the opening of the flue damper of the exhaust flue based on the temperature detected by the meter.

According to a third aspect of the present invention, there is provided an asphalt pavement waste material recycling apparatus, wherein a hot air thermometer and a static pressure sensor are provided in the vicinity of a combustion chamber, a waste material thermometer is provided in a heated waste material discharge section of the drum, and an exhaust gas discharge section of the drum is provided. And an exhaust gas thermometer
A burner combustion control device that controls the amount of combustion of the burner based on the temperature detected by the hot air thermometer, and a static pressure control device that adjusts the opening of the return damper of the circulation flue based on the static pressure detected by the static pressure sensor. Hot air flow control that sets the exhaust gas temperature as a control target based on the detection value of the waste material thermometer and adjusts the opening of the flue damper of the exhaust flue based on the set exhaust gas temperature and the temperature detected by the exhaust gas thermometer And a device.

[0011]

According to the asphalt pavement waste material recycling apparatus according to the first aspect of the present invention, a hot air temperature detected by a hot air thermometer near a combustion chamber is taken into a burner combustion control device, and a preset hot air temperature is set. And controls the amount of combustion of the burner based on the difference value to maintain the hot air sent into the drum at the set temperature. In addition, the static pressure detected by the static pressure sensor near the combustion chamber is taken into the static pressure control device, compared with a preset static pressure value, and the opening of the return damper of the circulating flue is adjusted based on the difference value. Then, the static pressure in the vicinity of the combustion chamber is maintained at a level slightly lower than the atmospheric pressure.

Then, the temperature of the heated waste material discharged from the drum is detected by a waste material temperature sensor, and the detected value is taken into a hot air flow control device and compared with a preset waste material temperature. For example, when the waste material temperature is lower than the waste material temperature set value, the opening degree of the flue damper of the exhaust flue is increased based on the difference value to increase the amount of hot air to be sucked. When the amount of hot air to be suctioned increases, the temperature of the hot air in the combustion chamber decreases, so that the burner combustion control device increases the amount of combustion of the burner so as to maintain the hot air temperature at a set value. Since the static pressure also increases to the negative side, the circulating gas is fed by increasing the opening of the return damper of the circulating flue so that the static pressure is maintained at the set value by the static pressure control device. The burner combustion controller and the static pressure controller finally control the temperature of the hot air sent into the drum at a set temperature, and increase the amount of hot air to supply the required heat to the drum. Raise the temperature of the waste material.

As described above, since the temperature of the hot air sent into the drum is controlled to be constant and to supply the required amount of hot air, the burner combustion amount and the amount of hot air are also controlled without excess, shortage, and stabilize. This also stabilizes the temperature of the waste heating material.

[0014] According to the second aspect of the present invention, the burner burn amount is controlled based on the hot air temperature detected by the hot air thermometer near the combustion chamber and sent into the drum. Maintain the hot air at the set temperature. In addition, the opening of the return damper of the circulation flue is adjusted based on the static pressure detected by the static pressure sensor near the combustion chamber, and the static pressure near the combustion chamber is maintained at a level slightly lower than the atmospheric pressure.

At the time of heating the waste material, the temperature of the exhaust gas discharged from the drum is detected by an exhaust gas temperature sensor instead of the temperature of the heated waste material, and the detected value is taken into a hot air flow control device and compared with a preset exhaust gas temperature. The opening of the flue damper of the exhaust flue is adjusted based on the difference value. When the amount of hot air to be sucked fluctuates, the burner combustion control device increases or decreases the burner combustion amount so as to maintain the hot air temperature at a set value, and in parallel with this, reduces the static pressure in the combustion chamber by the static pressure control device. The opening of the return damper of the circulation flue is adjusted to maintain the set value. Finally, the temperature of the hot air sent into the drum is controlled to be constant at a set temperature, and the amount of hot air is supplied to the drum to supply a necessary amount of heat to heat the waste material temperature to a predetermined temperature.

As described above, if the temperature is controlled by the temperature of the exhaust gas discharged from the drum instead of the temperature of the heated waste material, when the amount of hot air passing through the drum is increased or decreased, the temperature of the heated waste material is affected by the residence time of the drum. , While the response is slow,
Since the exhaust gas temperature has a quick response, the temperature of the heated waste material can be further stabilized.

Further, according to the asphalt pavement waste material regenerating apparatus of the third aspect, the burner burn amount is controlled based on the hot air temperature detected by the hot air thermometer near the combustion chamber and sent into the drum in the same manner as described above. Maintain the hot air at the set temperature. In addition, the opening of the return damper of the circulation flue is adjusted based on the static pressure detected by the static pressure sensor near the combustion chamber, and the static pressure near the combustion chamber is maintained at a level slightly lower than the atmospheric pressure.

Then, the temperature of the heated waste material discharged from the drum is detected by a waste material temperature sensor, and the detected value is taken into a hot air volume control device, compared with a preset waste material temperature, and controlled based on the difference value. Set the exhaust gas temperature to be used. The exhaust gas temperature is detected by an exhaust gas temperature sensor, and the detected value is taken into a hot air flow control device, compared with the previously set exhaust gas temperature, and the degree of opening of the flue damper of the exhaust flue is determined based on the difference value. To adjust. When the amount of hot air to be sucked fluctuates, the burner combustion control device increases or decreases the burner combustion amount so as to maintain the hot air temperature at a set value, and in parallel with this, reduces the static pressure in the combustion chamber by the static pressure control device. The opening of the return damper of the circulation flue is adjusted to maintain the set value. Finally, the temperature of the hot air sent into the drum is controlled to be constant at a set temperature, and the amount of hot air is supplied to the drum to supply a necessary amount of heat to heat the waste material temperature to a predetermined temperature.

As described above, the temperature of the heated waste material is detected, and the exhaust gas temperature as a control target is set based on the difference between the heated waste material temperature and the set value of the waste material temperature. Since the cascade control is used to adjust the opening, the waste material temperature can be controlled more accurately.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

In the asphalt pavement waste material recycling apparatus of the present invention shown in FIG. 1, the configuration and arrangement of the dryer and various sensors are almost the same as those of the conventional asphalt pavement waste material recycling apparatus. Various sensors have the same numbers.

In the figure, reference numeral 1 denotes a cylindrical drum rotatably supported in an inclined manner. A hot hopper 2 is disposed at one end of the drum.
A burner 3 is provided on the hot hopper 2 side, and a combustion chamber 4 is provided in front of the burner 3. Further, a cold hopper 5 is provided at the other end, and an exhaust flue 6 for discharging exhaust gas passing through the inside of the drum 1 is provided in the cold hopper 5. An exhaust fan 7 is disposed downstream of the exhaust flue 6, and the exhaust gas exhausted from the drum 1 is sucked and discharged to the atmosphere from a chimney via a dust collector (not shown).

On the hot hopper 2 side, a bucket conveyor 8 for feeding waste materials into the drum 1 is provided, while on the lower side of the cold hopper 5, a desired contact is made with hot air while rolling down the drum 1. A heating waste material discharging section 9 for discharging the heating waste material heated to the temperature is provided.

A waste material thermometer 10 for detecting the temperature of the heated waste material is provided in the heated waste material discharge section 9, and the temperature of the exhaust gas discharged from the drum 1 is detected near the exhaust gas outlet of the cold hopper 5. An exhaust gas thermometer 11 is provided. The combustion chamber 4 is provided with a hot air thermometer 12 for detecting a hot air temperature in the combustion chamber 4.

Further, a circulation flue 15 having a dry cyclone 13 and an exhaust fan 14 is provided by branching off the exhaust flue 6, and a return damper 16 for adjusting the flow rate of the return gas is provided in the middle thereof. The tip of the circulation flue 15 is connected to the combustion chamber 4. Furthermore, the hot hopper 2 has a drum 1
A static pressure sensor 17 for detecting a static pressure in the inside and a flue damper 18 for adjusting a gas flow rate passing through the inside of the drum 1 are provided in the exhaust flue 6.

A burner combustion control device 19 includes a hot air temperature setting section 20 and a hot air thermometer 12 near the combustion chamber 4.
Is compared with a set value previously set in the hot air temperature setting section 20, and the combustion amount of the burner 3 is controlled so that the hot air temperature becomes the set value. The set value of the hot air temperature is set to a temperature at which asphalt in the waste material is not overheated even when the hot air is sent to the dryer 1, for example, about 600 ° C.

Reference numeral 21 denotes a static pressure control device, which is provided with a static pressure setting unit 22 for controlling a static pressure detected by the static pressure sensor 17 in the combustion chamber 4 and a set value previously set in the static pressure setting unit 22. And the opening degree of the return damper 16 of the circulation flue 15 is controlled so that the static pressure becomes a set value. This static pressure set value is a static pressure slightly less than the atmospheric pressure, for example, -3 to -4 mm, so that excess air is not sucked from the gap near the combustion chamber 4 and hot air does not blow out from the gap.
Set to Aq.

Reference numeral 23 denotes a hot air volume control device which includes a waste material temperature setting unit 24, which compares a heated waste material temperature detected by the waste material thermometer 10 with a preset value set in the waste material temperature setting unit 24 in advance. The opening degree of the flue damper 18 of the exhaust flue 6 is controlled so that the waste material temperature becomes a set value, and the amount of hot air required for the waste material temperature is secured. This waste material temperature set value is, for example, 1
It is set around 60 ° C.

Next, a case where the waste material is heated by the above asphalt pavement waste material recycling apparatus will be described.

The burner combustion control device 19 compares the hot air temperature detected by the hot air thermometer 12 in the combustion chamber 4 with a preset hot air temperature, and controls the amount of combustion of the burner 3 based on the difference between the temperatures. Set the hot air sent into the set temperature,
For example, always try to keep it at 600 ° C. Further, the static pressure control device 21 compares the static pressure detected by the static pressure sensor 17 in the combustion chamber 4 with a preset static pressure value, and based on the difference value, opens the return damper 16 of the circulation flue 15. Degree, and the static pressure near the combustion chamber 12 is, for example, -3 to -4 m
Attempt to maintain it at about mAq.

Then, the temperature of the heated waste material discharged from the drum 1 is detected by the waste material temperature sensor 10 and taken into the hot air volume control device 23, and is compared with a preset waste material temperature. And, for example, when the waste material temperature is lower than the set value,
Based on the difference value, the opening of the flue damper 18 of the exhaust flue 6 is increased to increase the amount of hot air to be sucked. When the amount of hot air to be sucked increases, the temperature of the hot air in the combustion chamber 4 decreases. Therefore, the burner 3 increases the amount of combustion of the burner 3 so that the hot air temperature is maintained at a set value by the burner combustion control device 19, and the hot air temperature is raised to 600 ° C. Try to keep on.

At the same time, the static pressure in the combustion chamber 4 also increases to the negative side, so that the static pressure controller 21 controls the return damper 16 of the circulation flue 15 so that the static pressure is maintained at a set value. The circulation gas is increased by increasing the opening to the combustion chamber 4.
Send in. Finally, the temperature of the hot air sent into the drum is maintained at the set temperature of 600 ° C. by the burner combustion control device 19 and the static pressure control device 21, and the amount of hot air is increased to supply the necessary heat amount into the drum. Becomes

As described above, the hot air at the set temperature of 600 ° C. is always introduced into the drum 1, and the amount of the hot air is sufficient to heat the waste material to the desired temperature and is supplied without excess or shortage. Therefore, the heat exchange between the hot air and the waste material is stabilized in an ideal form, and the temperature of the heated waste material is also stabilized.

FIG. 2 shows another embodiment, in which the control of the burner combustion control unit 19 and the control of the static pressure control unit 21 are the same as described above, but the hot air control unit 23 replaces the waste material temperature with the exhaust gas temperature. The flue gas temperature control unit 25 controls the flue gas damper 18. The exhaust gas temperature setting unit 25 is provided. The exhaust gas temperature detected by the exhaust gas temperature sensor 11 is compared with a preset value set in the exhaust gas temperature setting unit 25 in advance. The opening degree of the flue damper 18 of the exhaust flue 6 is controlled so that
Secure the amount of hot air required for heating waste materials.

As described above, if the temperature of the exhaust gas discharged from the drum 1 is controlled instead of the temperature of the heated waste material, when the amount of hot air passing through the inside of the drum 1 is increased or decreased, the temperature of the heated waste material is equal to the residence time of the drum. On the other hand, while the response is slow, the exhaust gas temperature has a fast response, so that the temperature of the heated waste material can be further stabilized. Further, in the initial stage of the start of the supply of the waste material, since the true waste material temperature is not detected until the waste material reaches the discharge section 9 of the drum 1, it is convenient to control the temperature of the waste gas instead of the waste material temperature. Waste material temperature can be controlled.

The set value of the exhaust gas temperature is set to a value slightly higher than the temperature of the waste material in the parallel flow type heating device in which the hot air and the waste material flow in the same direction as shown in FIG. Since the temperature of the hot air to be sent is constant and the amount of the hot air is also supplied stably, the temperature of the waste material can be sufficiently controlled by controlling the exhaust gas temperature.

Next, the case where the waste material is heated by the asphalt pavement waste material recycling apparatus will be described.

As in the first embodiment, the burner combustion control device 19 controls the amount of combustion of the burner 3 based on the hot air temperature detected by the hot air thermometer 12 in the combustion chamber 4 and sets the hot air sent into the drum 1. Attempts to always maintain the temperature, for example 600 ° C. Further, the static pressure control device 21 controls the combustion chamber 4
The opening degree of the return damper 16 of the circulation flue 15 is adjusted based on the static pressure detected by the static pressure sensor 17 in the inside, and the static pressure near the combustion chamber 12 is maintained at, for example, about -3 to -4 mmAq. .

At the time of heating the waste material, the temperature of the exhaust gas discharged from the drum 1 is detected by the exhaust gas temperature sensor 11 in place of the temperature of the heated waste material, and the detected value is taken into the hot air volume control device 23, and the preset exhaust gas temperature and The opening degree of the flue damper 18 of the exhaust flue 6 is adjusted based on the difference value. And when the amount of hot air to be sucked fluctuates,
The combustion amount of the burner 3 is increased or decreased by the burner combustion control device 19 so as to maintain the hot air temperature at the set value, and in parallel with this, the static pressure in the combustion chamber 4 is maintained at the set value by the static pressure control device 21. Thus, the opening of the return damper 16 of the circulation flue 15 is adjusted. Finally, the temperature of the hot air sent into the drum 1 is controlled to be constant at a set temperature, and the amount of hot air is supplied to the drum to supply a necessary amount of heat to heat the waste material to a predetermined temperature.

FIG. 3 shows still another embodiment, in which the control of the burner combustion control device 19 and the static pressure control device 21 is the same as described above, but first, in order to more accurately control the temperature of the heated waste material. The temperature of the heated waste material is detected, the exhaust gas temperature to be controlled is set based on the difference between the heated waste material temperature and the waste material temperature set value, and the opening degree of the flue damper 18 of the exhaust flue 6 is determined by the exhaust gas temperature. Adopt cascade control to adjust.

The hot air control device 23 includes a waste material temperature setting unit 26.
The exhaust gas temperature as a control target is determined from the waste material temperature detected by the waste material thermometer 10 and a set value previously set in the waste material temperature setting unit 26, and this value is used as the exhaust gas temperature setting device 2.
7 and further compares the exhaust gas temperature detected by the exhaust gas sensor 11 with the set value set in the exhaust gas temperature setting unit 27, and outputs the control amount to the flue damper controller 28 to output the smoke from the exhaust flue 6. The opening degree of the road damper 18 is adjusted to secure the amount of hot air required for heating the waste material.

Next, a case where the waste material is heated by the asphalt pavement waste material recycling apparatus will be described.

Similarly to the above, the burner combustion control device 19 controls the amount of combustion of the burner 3 based on the hot air temperature detected by the hot air thermometer 12 in the combustion chamber 4 and changes the hot air sent into the drum 1 to a set temperature, for example. Always try to maintain at 600 ° C. The static pressure control device 21 also controls the circulation flue 1 based on the static pressure detected by the static pressure sensor 17 in the combustion chamber 4.
5, the opening of the return damper 16 is adjusted, and the combustion chamber 12
An attempt is made to maintain the nearby static pressure at, for example, about -3 to -4 mmAq.

When the waste material is heated, the temperature of the waste material discharged from the drum 1 is detected by the waste material temperature sensor 10, and the detected value is taken into the hot air flow control device 23, compared with a preset set value, and the difference value is calculated. An exhaust gas temperature to be controlled is set based on the amount. Furthermore, an exhaust gas thermometer 1
1 is compared with the set value of the exhaust gas temperature, and the flue gas damper 1 of the exhaust flue 6 is
Adjust the opening of 8. When the amount of hot air to be suctioned fluctuates, the amount of combustion of the burner 3 is increased or decreased by the burner combustion control device 19 so as to maintain the hot air temperature at a set value. The opening of the return damper 16 of the circulation flue 15 is adjusted so as to maintain the static pressure in the inside at a set value. Finally, the temperature of the hot air sent into the drum 1 is controlled to be constant at a set temperature, and the amount of hot air is supplied to the drum to supply a necessary amount of heat to heat the waste material to a predetermined temperature.

As described above, the control target exhaust gas temperature is set on the basis of the difference between the detected heated waste material temperature and the waste material temperature set value, and the opening degree of the flue damper 18 of the exhaust flue 6 is set according to the exhaust gas temperature. Because the cascade control to adjust
Waste temperature can be controlled more accurately.

[0046]

As described above, according to the asphalt pavement waste material recycling apparatus according to the first aspect of the present invention, a hot air thermometer and a static pressure sensor are provided in the vicinity of the combustion chamber, and the waste material temperature is provided in the heated waste material discharge portion of the drum. A burner combustion controller that controls the burner combustion based on the temperature detected by the hot air thermometer, and adjusts the opening of the return damper of the circulating flue based on the static pressure detected by the static pressure sensor. Static pressure control device,
Equipped with a hot air volume control device that adjusts the opening of the flue damper of the exhaust flue based on the temperature detected by the waste material thermometer, so that the temperature of the hot air sent into the drum is constant and the required amount of hot air is supplied. Therefore, the burner combustion amount and the hot air amount are also controlled and stabilized without excess and deficiency, whereby the temperature of the heated waste material is also stabilized.

Further, according to the asphalt pavement waste material recycling apparatus according to the second aspect of the present invention, a hot air thermometer and a static pressure sensor are provided near the combustion chamber, and an exhaust gas thermometer is provided at the exhaust gas discharge section of the drum. A burner combustion control device that controls the amount of combustion of the burner based on the temperature detected by the hot air thermometer, and a static pressure control device that adjusts the opening of the return damper of the circulating flue based on the static pressure detected by the static pressure sensor. Since the system has a hot air volume control device that adjusts the opening of the flue damper of the exhaust flue based on the temperature detected by the exhaust gas thermometer, when the amount of hot air passing through the drum is increased or decreased, Due to the residence time of the exhaust gas, the response is slow, whereas the exhaust gas temperature has a fast response, so that the temperature of the heated waste material can be more stabilized.

Further, according to the asphalt pavement waste material recycling apparatus according to the third aspect of the present invention, a hot air thermometer and a static pressure sensor are provided in the vicinity of the combustion chamber, a waste material thermometer is provided in a heated waste material discharge section of the drum, and a drum thermometer is provided. An exhaust gas thermometer is installed in the exhaust gas discharge section, and a burner combustion control device that controls the burner combustion amount based on the temperature detected by the hot air thermometer, and returns to the circulation flue based on the static pressure detected by the static pressure sensor. A static pressure control device for adjusting the opening degree of the damper; and an exhaust gas temperature to be controlled as a control target based on the detected value of the waste material thermometer, and an exhaust flue based on the set exhaust gas temperature and the detected temperature of the exhaust gas thermometer. A hot air volume control device that adjusts the degree of opening of the flue damper is used to set the target exhaust gas temperature based on the difference between the detected heating waste material temperature and the waste material temperature set value. exhaust Further it can be accurately controlled waste temperature as a cascade control for adjusting the opening of the road flue damper.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of an asphalt pavement waste material recycling apparatus according to the present invention.

FIG. 2 is a schematic configuration diagram showing another embodiment of the asphalt pavement waste material recycling apparatus according to the present invention.

FIG. 3 is a schematic configuration diagram showing another embodiment of the asphalt pavement waste material recycling apparatus according to the present invention.

FIG. 4 is a schematic configuration diagram showing a conventional asphalt pavement waste material recycling apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Drum 3 ... Burner 4 ... Combustion chamber 6 ... Exhaust flue 9 ... Heated waste material discharge part 10 ... Waste material thermometer 11 ... Exhaust gas thermometer 12 ... Hot air thermometer 15 ... Circulation flue 16 ... Return damper 17 ... Static pressure sensor Reference Signs List 18 flue damper 19 burner combustion control device 20 hot air temperature setting unit 21 static pressure control device 22 static pressure setting unit 23 hot air volume control device 24 waste material temperature setting unit 25 exhaust gas temperature setting unit 26 waste material Temperature setting unit 27: Exhaust gas temperature setting unit 28: Flue damper controller

Claims (3)

[Claims] 1. A burner provided with a combustion chamber is provided at one end of a drum for heating and regenerating asphalt pavement waste material, while an exhaust flue is provided at the other end, and the exhaust flue is branched. In the asphalt pavement waste material regenerating apparatus in which the disposed circulation flue is connected to the combustion chamber, a hot air thermometer and a static pressure sensor are provided in the vicinity of the combustion chamber, and a waste material thermometer is provided in a heated waste material discharge section of the drum. A burner combustion control device that controls the amount of combustion of the burner based on the temperature detected by the hot air thermometer, and a static pressure control device that adjusts the opening of the return damper of the circulation flue based on the static pressure detected by the static pressure sensor. An asphalt pavement waste material recycling device comprising a hot air volume control device for adjusting an opening of a flue damper of an exhaust flue based on a temperature detected by a waste material thermometer. 2. A burner having a combustion chamber is provided at one end of a drum for heating and regenerating asphalt pavement waste, while an exhaust flue is provided at the other end, and the exhaust flue is branched. In the asphalt pavement waste material regenerating apparatus in which the disposed circulation flue is connected to the combustion chamber, a hot air thermometer and a static pressure sensor are provided near the combustion chamber, and an exhaust gas thermometer is provided at an exhaust gas discharge portion of the drum. A burner combustion control device that controls the amount of combustion of the burner based on the temperature detected by the thermometer; a static pressure control device that adjusts the opening of the return damper of the circulation flue based on the static pressure detected by the static pressure sensor; An asphalt pavement waste material recycling device, comprising a hot air volume control device that adjusts an opening of a flue damper of an exhaust flue based on a temperature detected by a thermometer. 3. A burner having a combustion chamber is provided at one end of a drum for heating and regenerating asphalt pavement waste material, while an exhaust flue is provided at the other end, and the exhaust flue is branched. In an asphalt pavement waste material regenerating apparatus in which a disposed circulation flue is connected to the combustion chamber, a hot air thermometer and a static pressure sensor are provided in the vicinity of the combustion chamber, a waste material thermometer is provided in a heated waste material discharge section of the drum, and a waste gas discharge of the drum is provided. A burner combustion control device that controls the amount of burner combustion based on the temperature detected by the hot air thermometer, and a return damper for the circulation flue based on the static pressure detected by the static pressure sensor. A static pressure control device that adjusts the opening degree, and an exhaust gas temperature to be controlled is set based on the detection value of the waste material thermometer, and the smoke of the exhaust flue is set based on the set exhaust gas temperature and the detection temperature of the exhaust gas thermometer. Road damper opening Asphalt pavement waste reproducing apparatus being characterized in that a hot air amount control device to be adjusted.