WO2021248926A1

WO2021248926A1 - Safety operation system for asphalt mixture hot-mix plant recycling device

Info

Publication number: WO2021248926A1
Application number: PCT/CN2021/075422
Authority: WO
Inventors: 郭倩; 尤裕淦
Original assignee: 福建省铁拓机械股份有限公司
Priority date: 2020-06-10
Filing date: 2021-02-05
Publication date: 2021-12-16
Also published as: CN212714380U

Abstract

A safety operation system for an asphalt mixture hot-mix plant recycling device, comprising a cold material bin (1), a regenerated material drying drum (2) and a stirring cylinder (3); a cold material valve (11) is provided at an outlet of the cold material bin (1), the cold material bin (1) feeds cold regenerated material towards the regenerated material drying drum (2), a burner (21) is provided at one end of the regenerated material drying drum (2), the regenerated material drying drum (2) heats and dries the cold regenerated material and then feeds same to the stirring cylinder (3), the stirring cylinder (3) comprises a finished material valve (31) and a waste material valve (32); and said system further comprises a temperature measurement apparatus (4) and a controller, the temperature measurement apparatus (4) is provided in the regenerated material drying drum (2) and is in signal connection with the controller, the controller is in signal connection with the cold material valve (11), the burner (21), the finished material valve (31) and the waste material valve (32), and the controller controls operation states of the cold material valve (11), the burner (21), the finished material valve (31) and the waste material valve (32). Thus, the present invention can detect the operation situation of said device in real time, achieve automatic fire extinguishing, and improve the safety of device operation.

Description

Safety operation system of asphalt mixture plant mixing thermal regeneration equipment

Technical field

The utility model relates to the technical field of asphalt recovery, in particular to a safe operation system of an asphalt mixture plant mixing thermal regeneration equipment.

Background technique

As more and more highways in the country enter the overhaul stage, a large amount of waste asphalt mixture will be produced. The large amount of waste asphalt mixture can be recycled and used, which can bring very considerable economic and social benefits. Heating and drying is a necessary link in the recycling of waste asphalt mixtures. Asphalt mixture plant mixing hot recycling equipment is a high-temperature production equipment. The recycled materials contain bitumen. Due to operating errors, equipment failures and other reasons, the equipment may catch fire. The drying drum is a relatively closed device, so it is not easy to intuitively observe the fire inside. When thick smoke is found from the recycled material drying drum, it has been a certain period of time after the fire has occurred and the fire has developed to a certain extent, and then the fire will be extinguished. There is a certain lag in work; usually, external fire extinguishing uses fire extinguishers and other equipment to extinguish, but the fire in the drum cannot be directly extinguished with a fire extinguisher. Generally, the equipment is stopped and the external water spray is used to cool the fire. After the fire is extinguished in this way, restarting the equipment and returning to the normal working state takes a long time and is more difficult, which has a greater impact on the production schedule.

Utility model content

In order to overcome the shortcomings in the prior art, the present utility model provides a safe operation system for the hot-mixed asphalt mixture plant regeneration equipment.

In order to achieve the above-mentioned purpose, the technical scheme adopted by the present utility model is as follows: a safe operation system of asphalt mixture plant mixing heat regeneration equipment, including a cold silo, a recycled material drying drum, and a mixing cylinder; the cold silo is equipped with a cold Material valve, the cold storage bin feeds the cold recycled material toward the recycled material drying drum; one end of the recycled material drying drum is equipped with a burner, and the recycled material drying drum heats and dries the cold recycled material and then sends it into the mixing tank; The cylinder includes a finished material valve and a waste material valve; it is characterized in that it also includes a temperature detection device and a controller. The valve, burner, finished material valve, waste material valve are connected with signals, and the controller controls the working status of the cold material valve, burner, finished material valve, and waste material valve.

Further, it also includes a metering device, an oil injection device, and a flame detector. The metering device is arranged between the regenerated material drying drum and the mixing cylinder to measure the regenerated material sent from the regenerated material drying drum to the mixing cylinder. The fuel injection device corresponds to the position of the metering device to inject oil toward the metering device to reduce stickiness. The flame detector corresponds to the position of the metering device to detect the working status information at the metering device and to signal connection with the controller. The signal connection of the oil device can control its working status.

Further, it also includes a material break detection device, the cold silo is provided with a vibration device, the material break detection device corresponds to the position of the cold material valve to detect the discharge state of the cold silo, and the material break detection device is connected to the controller in signal, The controller is connected with the signal of the vibration device and can control its working state.

Further, it also includes an exhaust gas treatment device. One end of the regenerated material drying drum is provided with an exhaust gas outlet, and an exhaust gas valve is provided at the exhaust gas outlet. The exhaust gas outlet is connected, the outlet end is connected to the burner and the original equipment, the fan is arranged on the exhaust gas pipeline, and the controller is connected with the exhaust gas valve and the fan signal and can control its working state.

From the above description of the present utility model, it can be seen that compared with the prior art, the present utility model provides a safe operation system for asphalt mixture plant mixing hot recycling equipment. By adding detection devices and controllers, the equipment operation can be monitored in real time. Detection, when an abnormality occurs, it can promptly send an alarm, and automatically execute fire extinguishing operations when a fire occurs. The response speed is fast to ensure the safe and stable operation of the equipment; the fire extinguishing operation adopts the method of adding a large amount of cold recycled materials to the equipment, and cold regeneration The material can be directly cooled internally and extinguished open flames. Compared with the traditional external spray cooling, the cooling and extinguishing are more direct and the effect is better. At the same time, the recycled material drying drum does not stop during the fire extinguishing process, which can avoid the stop of the drum. For internal sticky material problems, the fire extinguishing operation is actually to switch the working status of the various parts of the equipment itself, so there are fewer obstacles to completing the fire extinguishing or returning to the normal working state, restarting the work quickly and difficultly, and has little impact on the production of the enterprise.

Description of the drawings

Figure 1 is a schematic diagram of the safe operation system of an asphalt mixture plant-mixed thermal regeneration equipment of the utility model.

The signs in the figure correspond to the following: 1. Cold silo, 11. Cold material valve, 12. Vibration device, 2. Recycled material drying drum, 21. Burner, 22. Exhaust gas outlet, 23. Exhaust valve, 3. Stirring cylinder 31. Finished material valve, 32. Waste valve, 4. Temperature detection device, 5. Metering device, 6. Fuel injection device, 7. Flame detector, 8. Material cut detection device, 9. Exhaust gas treatment device, 91. Exhaust gas pipeline, 92. Fan.

detailed description

The following further describes the utility model through specific implementations.

Referring to Figure 1, a safe operation system of asphalt mixture plant mixing heat regeneration equipment includes a cold storage bin 1, a recycled material drying drum 2, a mixing cylinder 3, a temperature detection device 4, a metering device 5, and a fuel injection device 6 , Flame detector 7, material break detection device 8, exhaust gas treatment device 9, controller.

There is a cold material valve 11 at the outlet of the cold silo 1, and the cold silo 1 feeds the cold recycled material toward the recycled material drying drum. The cold silo 1 is equipped with a vibration device 12, and the material break detection device 8 corresponds to the cold material valve 11 Position to detect the discharging state of the cold storage bin 1, and the material cut detection device 8 is connected to the controller signal;

One end of the recycled material drying drum 2 is provided with a burner 21. The recycled material drying drum 2 heats and dries the cold recycled material and then sends it into the mixing cylinder 3; the temperature detection device 4 is installed in the recycled material drying drum 2 and interacts with it. Controller signal connection; the metering device 5 is set between the recycled material drying drum 2 and the mixing cylinder 3 to weigh the recycled material sent from the recycled material drying drum 2 to the mixing cylinder 2, and the fuel injection device 6 corresponds to the measurement The position of the device 5 is to inject oil toward the metering device 5 to reduce the sticky material. The flame detector 7 corresponds to the position of the metering device 5 to detect the working status information of the metering device 5 and connect with the controller signal; the recycled material drying drum 2 An exhaust gas outlet 22 is provided at one end, and an exhaust gas valve 23 is provided at the exhaust gas outlet 22. The exhaust gas treatment device 9 includes an exhaust gas pipe 91 and a fan 92. To the burner 21 and the original equipment, the fan 91 is installed on the exhaust gas pipe 91;

The mixing tank 3 includes a finished material valve 31 and a waste material valve 32;

The controller is connected to the cold material valve 11, the burner 21, the finished material valve 31, the waste material valve 32, the fuel injection device 6, the vibration device 12, the waste gas valve 23, and the fan 92 signal respectively, and can control the cold material valve 11 and the burner 21. The working status of the finished material valve 31, the waste material valve 32, the fuel injection device 6, the vibration device 12, the waste gas valve 23, and the fan 92.

The safe operation method of this kind of asphalt mixing plant hot recycling equipment is specifically as follows:

Under normal working conditions: the cold silo 1 feeds the cold recycled material toward the recycled material drying drum 2. The recycled material drying drum 2 heats and drys the passed cold recycled material through the burner 21, and the hot recycled material enters the metering device 5 The inside is metered and then sent into the mixing tank 2; the finished material valve 31 of the mixing tank 3 is open, the waste valve 32 is closed, and the hot regenerated material is stirred by the mixing tank 3 and sent out from the finished material valve 31.

Due to the high viscosity of the hot regenerated material, in order to prevent sticking of the material, the fuel injection device 6 injects diesel fuel into the metering device 5 where the material is easy to stick. Because the diesel fuel is flammable, the flame detector cloth 7 is placed here. The exhaust gas generated in the regenerated material drying drum 2 is sent out from the exhaust gas outlet 22, and the fan 92 sends the exhaust gas into the exhaust gas pipe 91, and the exhaust gas enters the combustor 21 through the exhaust gas pipe 91 for combustion treatment, or enters the original equipment for treatment.

The temperature detection device 4 detects the temperature value in the recycled material drying drum 2 in real time, and transmits the temperature value to the controller in real time; the flame detector 7 detects the working status information at the metering device 5 in real time and transmits the information to the controller ; When the cold material valve 11 of the cold silo 1 is in an open state, the material cut detection device 8 detects the discharge state of the cold material valve 11 in real time, and transmits the status information to the controller in real time; the controller stores the corresponding The preset value of the working state of the recycled material drying drum, where the normal working state in the drum corresponds to the normal value in the preset value, and the fire state in the drum corresponds to the upper limit of the preset value, and the normal working state in the drum is the same as There is a critical state between the fire states, and the critical state corresponds to the alarm value in the preset value, where the normal value <the alarm value <the upper limit value, and the controller compares the temperature value transmitted by the temperature detection device 4 with the preset value .

If the temperature value transmitted by the temperature detection device 4 rises to the alarm value, the controller executes the alarm operation;

Since the fire extinguishing operation relies on the feeding of cold recycled materials, it is necessary to ensure the reliability of the cold storage bin 1. When the material interruption detection device 8 detects the material interruption signal, the material interruption status information is sent to the controller, and the controller executes vibration For the blockage removal operation, the vibration device 12 drives the cold storage bin 1 to vibrate to remove the blockage, and stop the vibration after the controller no longer receives the information of the material interruption; the controller starts to perform the vibration blockage removal operation and simultaneously performs the timing operation. At the first set time, if the controller still receives the material interruption status information, the controller executes an alarm operation; when the second set time is counted, the controller still receives the material interruption status information, then the controller executes the fire-reducing operation : Reduce the working power of the burner 21; wherein the first set time is less than the second set time;

The alarm operation is: sound and light alarm response.

If the temperature value transmitted by the temperature detection device rises to the upper limit, the controller automatically executes the fire extinguishing operation: if the flame detector 7 detects that the metering device 5 is on fire, the controller automatically executes the fire extinguishing operation;

Among them, the automatic fire extinguishing operation is: close the burner 21 and lock the burner state to the prohibited start state, fully open the cold material valve 11, the closed fuel injection device 6, close the exhaust valve 23, the fan 92, and close the finished material valve 31 of the mixing tank. , Open the waste valve 32 of the mixing tank;

The cold storage silo 1 sends a large amount of cold recycled material to the regeneration drying drum 2. When the cold recycled material passes through the recycled material drying drum 2, the regeneration drying drum 2 is quickly cooled and the fire is extinguished, and the cold recycled material is measured Device 5 extinguishes the fire, and the recycled materials are finally discharged through the waste valve and discarded. The function of closing the waste gas valve 23 and the fan 92 is to prevent the waste gas from circulating inside the regenerated material drying drum 2 and at the same time prevent the open flame from being introduced into the original equipment; when the temperature value transmitted by the temperature detection device 4 drops to a normal value, the controller unlocks the burner 21 state.

The above is only a specific implementation of the present utility model, but the design concept of the present utility model is not limited to this. Any insubstantial changes to the present utility model using this concept shall be infringements of the protection scope of the present utility model. behavior.

Claims

A safe operation system for hot-mixing regeneration equipment in an asphalt mixture plant, including a cold silo, a recycled material drying drum, and a mixing cylinder; a cold material valve is provided at the outlet of the cold silo, and the cold silo is fed toward the recycled material drying drum Cold recycled material; one end of the recycled material drying drum is equipped with a burner, and the recycled material drying drum heats and dries the cold recycled material and then sends it into the mixing tank; the mixing tank includes a finished material valve and a waste material valve; It includes a temperature detection device and a controller. The temperature detection device is arranged in the recycled material drying drum and is signal-connected to the controller. The controller is signal-connected to the cold material valve, the burner, the finished material valve, and the waste material valve, respectively, The controller controls the working status of the cold material valve, burner, finished material valve, and waste material valve.
The safe operation system of an asphalt mixture plant-mixing thermal regeneration equipment according to claim 1, characterized in that it also includes a metering device, an oil injection device, and a flame detector, and the metering device is provided on the recycled material drying drum and the mixing device. Between the cylinders, the regenerated material sent to the mixing cylinder from the regenerated material drying drum is metered. The fuel injection device corresponds to the position of the metering device to inject oil toward the metering device to reduce the sticky material. The flame detector corresponds to the position of the metering device. , In order to detect the working status information of the metering device and signal connection with the controller, the controller is signal connected with the fuel injection device and can control its working status.
The safe operation system of an asphalt mixture plant-mix hot regeneration equipment according to claim 1, characterized in that it further comprises a material break detection device, a vibration device is provided on the cold silo, and the material break detection device corresponds to a cold material valve Position to detect the discharging state of the cold storage bin, the material-breaking detection device is connected with the controller signal, and the controller is connected with the vibration device signal and can control its working state.
The safe operation system of an asphalt mixture plant-mix thermal regeneration equipment according to claim 1, characterized in that it further comprises an exhaust gas treatment device, one end of the regenerated material drying drum is provided with an exhaust gas outlet, and an exhaust gas valve is arranged at the exhaust gas outlet. The exhaust gas treatment device includes an exhaust gas pipe, a fan, the exhaust gas outlet of the regenerated material drying drum at the inlet end of the exhaust gas pipe is connected, the outlet end is connected to the burner and the original equipment, the fan is arranged on the exhaust gas pipe, the controller and the exhaust gas valve, The fan signal is connected and its working status can be controlled.