A smelting slag ladle liquid level measurement and hood linkage control system

Abstract

The utility model discloses a kind of smelting slag ladle liquid level measurement and linkage control system of fume collecting hood, including smelting slag ladle and fume collecting hood, the fume collecting hood is equipped with driving mechanism for driving fume collecting hood;The system further includes PLC controller, the measuring tube on fume collecting hood and the radar liquid level meter on measuring tube;Turbine cooling device is further equipped in the measuring tube;The radar liquid level meter is connected with PLC controller by AD conversion module;The driving mechanism is connected with PLC controller by intermediate relay;The system further includes alarm device and infrared thermal imaging device connected with PLC controller.The utility model does not need artificial moment observation slag ladle liquid level, when slag ladle liquid level reaches set liquid level upper limit, output alarm, realize slag ladle liquid level and fume collecting hood interlock control promotion, improve on-site operation environment, reduce labor intensity of worker;Simultaneously also avoid the occurrence of full ladle overflow condition of slag ladle, guarantee on-site safety production.

Description

Technical Field

[0001] This utility model belongs to the field of automation technology in copper smelting, and specifically relates to a linkage control system for measuring the liquid level in the slag ladle and the fume hood in a smelting furnace. Background Technology

[0002] The existing slag ladle level monitoring system for double-flash smelting furnaces faces the following technical bottlenecks: Lack of liquid level detection: The slag ladles for receiving and discharging molten material are not equipped with automated liquid level measuring devices. Personnel on duty must judge the liquid level of the molten slag visually through the observation port on the second floor. The operation process is complicated: the existing fume hoods are generally driven by electric chain hoists or cylinders. Each slag discharge requires multiple steps, including manual observation, manual operation, and equipment switching, which is cumbersome, time-consuming, and labor-intensive. Significant safety risks exist: manual observation has an error of approximately ±15% in judging liquid level, which can easily lead to delays in plugging operations; slag overflow accidents caused by untimely plugging account for 32%, seriously threatening production safety.

[0003] Therefore, there is an urgent need to develop a non-contact liquid level measurement system based on radar waves. This system must be capable of stable operation in high-temperature, high-dust, and highly corrosive flue gas environments. By linking the liquid level data with the fume hood control system in real time, it is expected to significantly improve the automation level of the slag discharge process, thereby effectively reducing labor intensity, improving production safety, and optimizing overall production efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a linkage control system for slag ladle liquid level measurement and fume hood linkage in smelting furnaces. This invention has the ability to work stably in high-temperature, high-dust, and highly corrosive flue gas environments. By linking the liquid level data with the fume hood control system in real time, it significantly improves the automation level of the slag discharge process, thereby effectively reducing labor intensity, improving production safety, and optimizing overall production efficiency.

[0005] This utility model is achieved through the following technical solution: A linkage control system for liquid level measurement and fume hood in a smelting slag ladle includes a smelting slag ladle and a fume hood. The fume hood is equipped with a drive mechanism for driving the fume hood. The system also includes a PLC controller, a measuring tube mounted on the fume hood, and a radar level gauge mounted on the measuring tube. A turbine cooling device connected to the PLC controller via a relay is also provided inside the measuring tube. The radar level gauge is connected to the PLC controller via an AD conversion module. The drive mechanism is connected to the PLC controller via a relay. The system also includes an alarm device and an infrared thermal imaging device connected to the PLC controller.

[0006] As further described in this utility model, the turbine cooling device includes a centrifugal fan and a compressed air nozzle.

[0007] To further explain this utility model, the alarm device is provided in four sets, respectively located around the smelting furnace; the alarm device includes an audible and visual device and a display screen. By placing the alarm device around the smelting furnace, its warning effect is improved.

[0008] To further explain this utility model, the measuring tube is made of a high-temperature resistant alloy material, making it suitable for complex working conditions in the metallurgical industry involving high temperatures, high dust levels, and highly corrosive fumes.

[0009] As a further description of this utility model, the system also includes a temperature sensor connected to the PLC controller; the temperature sensor is mounted on the radar level gauge. A measuring tube is installed on the measuring hole above the fume hood, and a radar level gauge is installed inside the measuring tube. The radar level gauge collects the liquid level of the slag in the smelting furnace in real time, converts it into a digital signal through an AD conversion module, and feeds it back to the PLC controller. The turbine cooling device includes a centrifugal fan and a compressed air nozzle, which is controlled by the PLC controller. The compressed air nozzle is directed towards the radar level gauge. After the centrifugal fan compresses air, the airflow covers the surface of the radar level gauge antenna through the compressed air nozzle, ensuring uniform cooling and preventing the radar level gauge from overheating and affecting its performance. The operating temperature of the radar level gauge is collected by a temperature sensor and fed back to the PLC controller. The PLC controller controls the drive mechanism of the fume hood through a relay. When the liquid level reaches the set warning position, the radar level gauge feeds back a signal to the PLC controller, which then controls the drive mechanism to adjust the lifting of the fume hood. When the liquid level drops, the fume hood is driven to lower. At the same time, when the liquid level reaches the warning position or the infrared thermal imaging device detects that the PLC controller temperature is too high, the PLC controller receives the feedback signal and controls the alarm device and display screen to issue a warning, thereby alerting the staff.

[0010] The beneficial effects of this utility model are: This invention has the ability to work stably in high temperature, high dust and highly corrosive flue gas environments. By linking the liquid level data with the fume hood control system in real time, it significantly improves the automation level of the slag discharge process, thereby effectively reducing labor intensity, improving production safety and optimizing overall production efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the system circuit structure of this utility model; In the diagram: 1. Measuring tube; 2. Radar level gauge; 3. Turbine cooling device. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings. Example

[0013] As shown in the figure, a linkage control system for liquid level measurement and fume hood in a smelting slag ladle includes a smelting slag ladle and a fume hood. The fume hood is equipped with a drive mechanism for driving the fume hood. The system also includes a PLC controller, a measuring tube 1 installed on the fume hood, and a radar level gauge 2 installed on the measuring tube 1. The measuring tube 1 is also equipped with a turbine cooling device 3 connected to the PLC controller via a relay. The radar level gauge 2 is connected to the PLC controller via an AD conversion module. The drive mechanism is connected to the PLC controller via a relay. The system also includes an alarm device and an infrared thermal imaging device connected to the PLC controller.

[0014] The turbine cooling device 3 includes a centrifugal fan and a compressed air nozzle.

[0015] The alarm device is set in four groups, which are respectively located around the smelting furnace; the alarm device includes an audible and visual device and a display screen.

[0016] The measuring tube 1 is made of high-temperature resistant alloy material.

[0017] The system also includes a temperature sensor connected to the PLC controller; the temperature sensor is located on the radar level gauge 2.

[0018] A measuring tube is installed on the measuring hole above the fume hood, and a radar level gauge is installed inside the measuring tube. The radar level gauge collects the liquid level of the slag in the smelting furnace in real time, converts it into a digital signal through an AD conversion module, and feeds it back to the PLC controller. The turbine cooling device includes a centrifugal fan and a compressed air nozzle, which is controlled by the PLC controller. The compressed air nozzle is directed towards the radar level gauge. After the centrifugal fan compresses air, the airflow covers the surface of the radar level gauge antenna through the compressed air nozzle, ensuring uniform cooling and preventing the radar level gauge from overheating and affecting its performance. The operating temperature of the radar level gauge is collected by a temperature sensor and fed back to the PLC controller. The PLC controller controls the drive mechanism of the fume hood through a relay. When the liquid level reaches the set warning position, the radar level gauge feeds back a signal to the PLC controller, which then controls the drive mechanism to adjust the lifting of the fume hood. When the liquid level drops, the fume hood is driven to lower. At the same time, when the liquid level reaches the warning position or the infrared thermal imaging device detects that the PLC controller temperature is too high, the PLC controller receives the feedback signal and controls the alarm device and display screen to issue a warning, thereby alerting the staff. The electrical equipment of this utility model is powered by an external power source. The PLC controller can be a Siemens S7-300 series (CPU 315-2 PN / DP), configured with an AI module (SM331) to collect 4-20mA liquid level signals, and a DI / DO module (SM323) to control the drive mechanism. The radar liquid level gauge can be a high-frequency narrow-beam radar liquid level gauge VEGA Puls 68.

Claims

1. A linkage control system for measuring the liquid level of a smelting slag ladle and a fume hood, comprising a smelting slag ladle and a fume hood, wherein the fume hood is provided with a driving mechanism for driving the fume hood; characterized in that: The system also includes a PLC controller, a measuring tube (1) mounted on the smoke hood, and a radar level gauge (2) mounted on the measuring tube (1); the measuring tube (1) is also equipped with a turbine cooling device (3) connected to the PLC controller via a relay; the radar level gauge (2) is connected to the PLC controller via an AD conversion module; the drive mechanism is connected to the PLC controller via a relay; the system also includes an alarm device and an infrared thermal imaging device connected to the PLC controller.

2. The linkage control system for slag ladle level measurement and fume hood linkage according to claim 1, characterized in that: The turbine cooling device (3) includes a centrifugal fan and a compressed air nozzle.

3. The system according to claim 1, wherein the system further comprises a slag pot level sensor. The alarm device is set in four groups, which are respectively located around the smelting furnace; the alarm device includes an audible and visual device and a display screen.

4. The smelting slag ladle level measurement and hood linkage control system of claim 1, wherein: The measuring tube (1) is made of high-temperature resistant alloy material.

5. The smelting slag ladle level measurement and hood linkage control system of claim 1, wherein: The system also includes a temperature sensor connected to the PLC controller; the temperature sensor is located on the radar level gauge (2).

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