Novel measuring device for detecting burst temperature of green pellets

Abstract

The utility model provides a novel measuring device for detecting the burst temperature of green pellets, and belongs to the technical field of performance detection of green pellets of pellets in the metallurgical industry. A pellet drying cup is located in a vertical heating furnace, a sound sensor is arranged in the middle of the pellet drying cup to collect acoustic signals in the green pellet bursting process, an air temperature thermocouple is arranged on the lower portion of the pellet drying cup, a high-aluminum spherical tank is arranged below the air temperature thermocouple, and the high-aluminum spherical tank is located in the middle of the vertical heating furnace. A furnace temperature thermocouple is arranged in the middle of the vertical heating furnace body; and the wind temperature thermocouple, the sound sensor and the metal wind speed tester are all connected with the PLC control unit. According to the utility model, the burst condition of the green pellets and the wind speed and the temperature of the corresponding stage can be monitored in real time by collecting sound data, so that the burst temperature of the green pellets can be obtained more quickly and accurately. The method is of great significance to improvement of green pellet burst detection and analysis means, reduction of workload, improvement of burst temperature accuracy and the like.

Description

Technical Field

[0001] This utility model relates to a novel measuring device for detecting the bursting temperature of green pellets, belonging to the technical field of green pellet performance testing in the metallurgical industry. Background Technology

[0002] Compared to sinter, ore pellets have a significant environmental advantage in terms of pollutant emissions. Increasing the proportion of ore pellets in blast furnaces and implementing high-proportion pellet smelting has become an important measure for energy conservation and emission reduction in ironmaking processes and for green and low-carbon blast furnace ironmaking. Therefore, when blast furnaces adopt high-proportion pellet smelting, the quality of the ore pellets is particularly important.

[0003] In the production process of green pellets, the bursting temperature is a key indicator that needs to be monitored. If the bursting temperature is low, numerous cracks are likely to form in the pellets during the drying stage, affecting the strength of the finished pellets. If the strength of the finished pellets does not meet requirements, they are prone to breakage under mechanical force, producing a large amount of powder. This leads to an increase in the pressure differential inside the blast furnace, affecting the stable operation of the blast furnace. Current methods for detecting the bursting temperature of green pellets have drawbacks such as high repetition rates and the need for manual observation. Therefore, it is necessary to develop an automatic device for detecting the thermal bursting temperature of pellets. This device would rapidly detect the bursting performance of green pellets under specific raw material conditions, thereby guiding on-site production. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art, specifically the difficulty in real-time and intuitive observation of the bursting of green bulbs using current laboratory green bulb bursting temperature devices, and the susceptibility to errors in manual judgment. This invention provides a novel measuring device for detecting green bulb bursting temperature. By collecting sound data, it can monitor the bursting process of the green bulbs and the corresponding wind speed and temperature in real time, thus obtaining the bursting temperature more quickly and accurately. This is of great significance for improving green bulb bursting detection and analysis methods, reducing workload, and increasing the accuracy of bursting temperature readings.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A novel measuring device for detecting the bursting temperature of green pellets includes: a hook, a pellet drying cup, a metal anemometer, a vertical heating furnace, a high-alumina pellet tank, a support platform, an air duct, a glass rotor flow meter, a constant-volume Roots blower, a PLC control unit, a furnace temperature thermocouple, an air temperature thermocouple, a sound sensor, and a lifting platform.

[0007] The lifting platform is connected to the pellet drying cup via a hook at its front end. A vertical heating furnace is installed on the support platform, and the pellet drying cup is located inside the vertical heating furnace. An air duct is connected below the support platform, and a glass rotor flow meter is installed inside the air duct. A sound sensor is placed in the middle of the pellet drying cup to collect acoustic signals during the green pellet bursting process. A wind temperature thermocouple is located at the bottom of the pellet drying cup, and a high-alumina pellet tank is placed below the wind temperature thermocouple. The high-alumina pellet tank is located in the middle of the vertical heating furnace and is used to heat the air blown in by the constant-volume Roots blower. A furnace temperature thermocouple is installed in the middle of the vertical heating furnace body. The wind temperature thermocouple, sound sensor, and metal wind speed measuring instrument are all connected to the PLC control unit.

[0008] Furthermore, the vertical heating furnace contains a cavity, the cavity wall contains silicon molybdenum rods, and the high-alumina spherical tank is placed in the center of the silicon molybdenum rods, with the pellet drying cup placed on top of the high-alumina spherical tank.

[0009] Furthermore, a refractory insulation layer is provided on the outside of the cavity of the vertical heating furnace.

[0010] Furthermore, an acoustic sensor is installed inside the upper insulation layer of the vertical heating furnace to monitor the acoustic signal of green pellet bursting during the experiment. The number of green pellet bursts is captured by the acoustic signal, and the acoustic sensor is at the same horizontal position as the pellet drying cup.

[0011] Furthermore, the bottom of the high-alumina spherical tank is provided with uniform circular holes with a diameter of 8-10mm for air blown in by a constant-volume Roots blower. The high-alumina spheres inside the high-alumina spherical tank are 12-14mm in size and are used for uniform distribution of hot air and heat storage.

[0012] Furthermore, the air temperature thermocouple is placed at the bottom of the pellet drying cup for real-time monitoring of the hot air temperature, and a furnace temperature thermocouple is embedded in the middle of the vertical heating furnace for real-time monitoring of the furnace temperature inside the vertical heating furnace.

[0013] Furthermore, a metal anemometer is installed on the upper part of the high-alumina spherical tank. After the air passes through the high-alumina spherical tank for heat exchange, its volume expands and the wind speed increases significantly. The metal anemometer is used to monitor the flow rate of high-temperature air in real time.

[0014] Furthermore, the bottom of the pellet drying cup is provided with uniform circular holes with a diameter of 5-8 mm, allowing hot air to pass through smoothly.

[0015] This utility model has the following beneficial effects:

[0016] This invention addresses the issue of air expanding in volume after heating at room temperature by monitoring the hot air velocity in real time. It allows for more accurate recording of the maximum wind velocity that green pellets can withstand at a specified temperature. Furthermore, this invention utilizes a sound sensor to collect sound signals during the green pellet bursting process in real time, enabling real-time recording of the number of bursts. For control, feedback from furnace temperature thermocouples and hot air thermocouples allows for PLC control of the furnace temperature. The PLC control unit can monitor the hot air temperature, hot air velocity, and sound signals received by the sound sensor in real time. The PLC control unit records and saves relevant data, and can observe the number of green pellet bursts and the corresponding wind velocity and temperature during bursting, thus accurately determining the bursting temperature of the pellets.

[0017] The purpose of this invention is to improve the accuracy and efficiency of monitoring the thermal bursting temperature of green pellets, and to reduce errors caused by manual laboratory experiments and existing equipment. This allows for real-time and accurate detection of the bursting temperature of green pellets, and evaluation of parameters such as wind speed and temperature that the on-site green pellet drying process can withstand. This invention is of great significance for improving the quality of finished pellets, increasing the efficiency of pellet production, and perfecting the pellet production process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a novel measuring device for detecting the bursting temperature of green pellets according to this utility model.

[0019] In the attached diagram, 1 is a hook, 2 is a pellet drying cup, 3 is a metal anemometer, 4 is a vertical heating furnace, 5 is a high-alumina pellet tank, 6 is a support platform, 7 is an air duct, 8 is a glass rotor flow meter, 9 is a constant-volume Roots blower, 10 is a PLC control unit, 11 is a furnace temperature thermocouple, 12 is an air temperature thermocouple, 13 is a sound sensor, and 14 is a lifting platform. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings: This embodiment is implemented based on the technical solution of the present invention and provides detailed implementation methods, but the protection scope of the present invention is not limited to the following embodiments.

[0021] like Figure 1 As shown, the novel measuring device for detecting the bursting temperature of green pellets involved in this embodiment includes: a hook 1, a pellet drying cup 2, a metal anemometer 3, a vertical heating furnace 4, a high-alumina pellet tank 5, a support platform 6, an air duct 7, a glass rotor flow meter 8, a constant volume Roots blower 9, a PLC control unit 10, a furnace temperature thermocouple 11, an air temperature thermocouple 12, a sound sensor 13, and a lifting platform 14;

[0022] The front end of the lifting platform 14 is connected to the pellet drying cup 2 via a hook 1. A vertical heating furnace 4 is installed on the support platform 6. The vertical heating furnace 4 has an internal cavity with silicon molybdenum rods on the cavity wall. The high-alumina pellet tank 5 is placed in the center of the silicon molybdenum rods, and the pellet drying cup 2 is placed on top of the high-alumina pellet tank 5. A refractory material heat insulation layer is installed on the outside of the cavity of the vertical heating furnace 4.

[0023] The pellet drying cup 2 is located inside the vertical heating furnace 4. The air pipe 7 is connected below the support platform 6. A glass rotor flow meter 8 is installed in the air pipe 7. A high-alumina pellet tank 5 is installed above the support platform 6. A sound sensor 13 is placed in the middle of the pellet drying cup 2 in the upper insulation layer of the vertical heating furnace 4 to collect the acoustic signal during the green pellet bursting process. This is used to monitor the acoustic signal of the green pellet bursting during the experiment and to capture the number of green pellet bursts through the acoustic signal. The sound sensor 13 and the pellet drying cup 2 are at the same horizontal position.

[0024] The lower part of the pellet drying cup 2 is equipped with an air temperature thermocouple 12. Below the air temperature thermocouple 12, a high-alumina spherical tank 5 is placed. The high-alumina spherical tank 5 is located in the middle of the vertical heating furnace 4. The bottom of the high-alumina spherical tank 5 has uniformly distributed circular holes with a diameter of 8-10 mm for air blown in by the constant-volume Roots blower 9. The high-alumina spherical tank 5 contains 12-14 mm high-alumina spheres for uniform hot air distribution and heat storage. The air temperature thermocouple 12 is placed at the lower part of the pellet drying cup 2 for real-time monitoring of the hot air temperature. A furnace temperature thermocouple 11 is embedded in the middle of the vertical heating furnace 4 for real-time monitoring of the furnace temperature inside the vertical heating furnace 4. A metal anemometer 3 is installed on the upper part of the high-alumina spherical tank 5. After the air passes through the high-alumina spherical tank 5 for heat exchange, its volume expands, and the wind speed increases significantly. The metal anemometer 3 is used to monitor the high-temperature air velocity in real time. The bottom of the pellet drying cup 2 has uniformly distributed circular holes with a diameter of 5-8 mm to allow hot air to pass through smoothly. A furnace temperature thermocouple 11 is installed in the middle of the vertical heating furnace 4; the air temperature thermocouple 12, the sound sensor 13, and the metal wind speed measuring instrument 3 are all connected to the PLC control unit 10.

[0025] The specific usage method provided by this utility model is as follows: First, the vertical heating furnace 4 is turned on through the PLC control unit 10. A furnace temperature thermocouple 11 is embedded in the middle of the vertical heating furnace 4 for real-time monitoring of the internal furnace temperature. Once the temperature reaches the specified level, heat is stored in the high-alumina spherical tank 5. The constant-volume Roots blower 9 is then turned on, and the input air flow rate is controlled by the glass rotor flowmeter 8. The air undergoes heat exchange and rectification in the high-alumina spherical tank 5, and the wind speed and hot air temperature are measured by the metal wind speed measuring instrument 3 and the wind temperature thermocouple 12. Once the wind temperature reaches the specified level... Fifty green pellets with a diameter of 10-16mm were placed in the pellet drying cup 2. The lifting platform 14 was adjusted by the PLC control unit 10 to lower the pellet drying cup 2 to the upper part of the vertical heating furnace 4. At this time, the timing was started. The PLC control unit 10 automatically collected the wind temperature change curve, the wind speed change curve, and the sound fluctuation signal collected by the sound sensor 13. It automatically and in real time output the number of green pellets bursting and the corresponding wind speed, temperature and other data. When the number of green pellets bursting reached 2, the experiment was stopped and the green pellet bursting temperature was output.

[0026] The above description is merely a preferred embodiment of this utility model. This utility model claims protection for a hardware configuration that does not rely on software implementation; it only requires determining the voltage of each pin to achieve the invention's objective. These specific embodiments are different implementations based on the overall concept of this utility model, and the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A novel measuring device for detecting the bursting temperature of green bulbs, characterized in that, include: Hook (1), pellet drying cup (2), metal anemometer (3), vertical heating furnace (4), high-alumina spherical tank (5), support platform (6), air duct (7), glass rotor flow meter (8), constant volume Roots blower (9), PLC control unit (10), furnace temperature thermocouple (11), air temperature thermocouple (12), sound sensor (13) and lifting platform (14); The front end of the lifting platform (14) is connected to the pellet drying cup (2) via a hook (1). A vertical heating furnace (4) is installed on the support platform (6). The pellet drying cup (2) is located inside the vertical heating furnace (4). An air pipe (7) is connected to the bottom of the support platform (6). A glass rotor flow meter (8) is installed inside the air pipe (7). A sound sensor (13) is placed in the middle of the pellet drying cup (2) to collect acoustic signals during the green pellet bursting process. A wind temperature thermocouple (12) is located at the bottom of the pellet drying cup (2). A high-alumina ball tank (5) is placed below the wind temperature thermocouple (12). The high-alumina ball tank (5) is located in the middle of the vertical heating furnace (4) and is used to heat the air blown in by the constant volume Roots blower (9). A furnace temperature thermocouple (11) is installed in the middle of the furnace body of the vertical heating furnace (4). The wind temperature thermocouple (12), the sound sensor (13), and the metal wind speed measuring instrument (3) are all connected to the PLC control unit (10).

2. The novel measuring device for detecting the bursting temperature of green bulbs according to claim 1, characterized in that, The vertical heating furnace (4) contains a cavity, the cavity wall contains silicon molybdenum rods, and the high-alumina spherical tank (5) is placed in the center of the silicon molybdenum rods, and the pellet drying cup (2) is placed on the upper part of the high-alumina spherical tank (5).

3. The novel measuring device for detecting the bursting temperature of green bulbs according to claim 2, characterized in that, The cavity of the vertical heating furnace (4) is provided with a refractory material heat insulation layer.

4. The novel measuring device for detecting the bursting temperature of green bulbs according to claim 3, characterized in that, A sound sensor (13) is installed in the upper insulation layer of the vertical heating furnace (4) to monitor the acoustic signal of green pellet bursting during the experiment. The number of green pellet bursts is captured by the acoustic signal, and the sound sensor (13) is at the same horizontal position as the pellet drying cup (2).

5. A novel measuring device for detecting the bursting temperature of green bulbs according to claim 1, characterized in that, The bottom of the high-alumina spherical tank (5) is provided with uniform circular holes with a diameter of 8-10 mm for air blown in by the constant-volume Roots blower (9). The high-alumina spheres inside the high-alumina spherical tank (5) are 12-14 mm in diameter and are used for uniform hot air distribution and heat storage.

6. The novel measuring device for detecting the bursting temperature of green bulbs according to claim 1, characterized in that, The air temperature thermocouple (12) is placed at the bottom of the pellet drying cup (2) for real-time monitoring of the hot air temperature. The furnace temperature thermocouple (11) is embedded in the middle of the vertical heating furnace (4) for real-time monitoring of the furnace temperature inside the vertical heating furnace (4).

7. A novel measuring device for detecting the bursting temperature of green bulbs according to claim 1, characterized in that, The high-alumina spherical tank (5) is equipped with a metal anemometer (3). After the air is heated by the high-alumina spherical tank (5), its volume expands and the wind speed increases significantly. The metal anemometer (3) is used to monitor the high-temperature air flow rate in real time.

8. A novel measuring device for detecting the bursting temperature of green bulbs according to claim 1, characterized in that, The bottom of the pellet drying cup (2) is provided with uniform round holes with a diameter of 5-8 mm, so that hot air can pass through smoothly.

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