Remote control system for filter press of coal preparation plant

Abstract

The utility model relates to the technical field of coal preparation, in particular to a remote control system for a filter press of a coal preparation plant, which comprises a filter press field control cabinet and a centralized control system, the pressure filter field control cabinet comprises a touch screen and a field PLC (Programmable Logic Controller), the touch screen is in communication connection with the field PLC, the field PLC is electrically connected with electrical equipment for realizing normal work of the pressure filter, and the centralized control system comprises a lower PLC and an upper industrial computer which are arranged in a control room and are in communication connection with each other; the lower PLC is in communication connection with the field PLC; the system further comprises a black water detection device, the black water detection device comprises an illuminance sensor and an LED illuminating lamp, the illuminance sensor and the LED illuminating lamp are oppositely arranged on the two side faces of the filter press water receiving tank so that light beams emitted by the LED illuminating lamp can penetrate through water in the filter press water receiving tank and then irradiate the illuminance sensor, and the illuminance sensor is electrically connected with the lower PLC. An alarm threshold value can be set according to the condition that the illumination intensity, detected by the illumination sensor, of the LED illuminating lamp in the clean water state in the water receiving tank of the filter press is taken as the reference, the illumination intensity detected by the illumination sensor can be reduced along with the mixing of the clean water into materials, and when the illumination intensity is reduced to the alarm threshold value, the lower PLC can affirm that black water is generated; at the moment, an alarm can be given through the upper industrial computer, a shutdown instruction is sent to the field PLC, remote monitoring is achieved, the labor cost is reduced, and people are prevented from being hurt by high-pressure oil and high-pressure wind.

Description

Technical Field

[0001] This utility model relates to the field of coal preparation technology, and in particular to a remote control system for a filter press in a coal preparation plant. Background Technology

[0002] In the coal preparation plant's production process, filter presses are crucial equipment for dewatering. Currently, our company has 10 filter presses used for dewatering flotation concentrates and tailings. During operation, if the filter cloth malfunctions, particles will be discharged along with the filtered water through the damaged area, producing black water and affecting product quality. Therefore, it is necessary to assign dedicated personnel to regularly inspect each filter press to replace the filter cloth promptly when problems arise, thus avoiding impact on product quality. However, manual inspection is time-consuming and labor-intensive, and there is a risk of injury from high-pressure oil and air during the pressure holding process. Summary of the Invention

[0003] To address the aforementioned problems, this utility model provides a remote control system for a filter press in a coal preparation plant.

[0004] This utility model provides a remote control system for a filter press in a coal preparation plant, including a filter press field control cabinet and a centralized control system. The filter press field control cabinet includes a touch screen and a field PLC controller, which are communicatively connected. The field PLC controller is electrically connected to electrical equipment used to enable the normal operation of the filter press. The centralized control system includes a lower-level PLC controller and an upper-level industrial computer, both located in the control room and communicatively connected. The lower-level PLC controller is communicatively connected to the field PLC controller. The system also includes a black water detection device, which includes an illuminance sensor and an LED light. The illuminance sensor and the LED light are positioned opposite each other on opposite sides of the filter press's water inlet tank, so that the light beam emitted by the LED light passes through the water in the tank and illuminates the illuminance sensor. The illuminance sensor is electrically connected to the lower-level PLC controller.

[0005] Compared with the prior art, the beneficial effects of this utility model are as follows: the alarm threshold can be set based on the light intensity of the LED lighting detected by the illuminance sensor in the water tank of the filter press under the condition of clear water. As materials are mixed into the clear water, the light intensity detected by the illuminance sensor will decrease accordingly. When it drops to the alarm threshold, the lower PLC controller can determine that black water has been generated. At this time, the upper industrial computer can issue an alarm and send a stop command to the on-site PLC controller to realize remote monitoring, reduce labor costs, and avoid injury from high-pressure oil and high-pressure air.

[0006] Optionally, a material spraying sensor is also included. The material spraying sensor is installed on the main beams on both sides of the filter plate of the press and is electrically connected to the lower-level PLC controller.

[0007] Optionally, multiple spray sensors are provided and evenly distributed on the beam.

[0008] Optionally, the spray sensor can be a water immersion detection sensor.

[0009] Optionally, a temperature sensor is installed on the feed pump of the filter press, and the temperature sensor is electrically connected to the lower-level PLC controller.

[0010] Optionally, it also includes a field secondary instrument box, which includes a digital display and an audible and visual alarm; the temperature sensor is electrically connected to the lower-level PLC controller via the digital display, and the digital display is electrically connected to the audible and visual alarm. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram showing the installation position of the black water inspection device in an embodiment of this utility model;

[0013] Figure 2 This is a schematic diagram showing the installation position of the spray sensor in an embodiment of this utility model.

[0014] Among them, 1. Illumination sensor; 2. Spraying sensor; 3. Temperature sensor. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this utility model are used to explain the present utility model, but are not intended to limit the present utility model.

[0016] See Figure 1 and Figure 2This utility model provides a remote control system for a filter press in a coal preparation plant, including a filter press field control cabinet and a centralized control system. The filter press field control cabinet includes a touch screen and a field PLC controller, which are communicatively connected. The touch screen can display the working status of the electrical equipment in the filter press. The field PLC controller is electrically connected to the electrical equipment (such as pull plates, hydraulic pumps, valves, etc.) used to enable the normal operation of the filter press. The centralized control system includes a lower-level PLC controller and an upper-level industrial computer, which are installed in the control room and are communicatively connected. The lower-level PLC controller is communicatively connected to the field PLC controller. It also includes a black water detection device, which includes an illuminance sensor 1 and an LED light. The illuminance sensor 1 and the LED light are arranged opposite to each other on both sides of the filter press water receiving tank at the bottom of the filter press, so that the light beam emitted by the LED light passes through the water in the filter press water receiving tank and shines on the illuminance sensor 1. The illuminance sensor 1 is electrically connected to the lower-level PLC controller.

[0017] During implementation, the light beam emitted by the LED lighting lamp passes through the water in the filter press's water tank and illuminates the illuminance sensor 1. The illuminance sensor 1 sends the detected light intensity signal to the lower-level PLC controller. The lower-level PLC controller compares the received light intensity signal with the set alarm threshold. When it is determined that the light intensity signal is less than the alarm threshold, it triggers an alarm through the upper-level industrial computer and sends a shutdown command to the field PLC controller. The field PLC controller then completes the shutdown operation of the filter press.

[0018] Specifically, an alarm threshold can be set based on the light intensity of the LED lighting detected by the illuminance sensor 1 when the water in the filter press is in the clear water state. As materials are mixed into the clear water, the light intensity detected by the illuminance sensor will decrease accordingly. When it drops to the alarm threshold, the lower-level PLC controller can determine that black water has been generated. At this time, an alarm can be triggered by the upper-level industrial computer and a stop command can be sent to the field PLC controller.

[0019] In one implementation, the alarm threshold can be set to multiple levels. For example, if the light intensity is 100 in the clear water state, the first-level alarm threshold is set to 80, and the lower-level PLC controller is used to prompt the alarm. The second-level alarm threshold is set to 60, and the lower-level PLC controller is used to prompt the alarm and send a stop command to the field PLC controller.

[0020] Both the illuminance sensor 1 and the LED lighting are waterproof. The power of the LED lighting can be selected according to the actual production environment, such as the width of the filter press water tank. The wider the tank, the higher the wattage. Our company actually selected a 20W LED lighting.

[0021] In practice, it also includes a material spraying sensor 2, which is installed on the main beams on both sides of the filter plate of the press. The material spraying sensor 2 is electrically connected to the lower-level PLC controller. When the filter press sprays material, the material is sprayed onto the main beams on both sides of the filter plate of the press and wets the material spraying sensor 2. After the material spraying sensor 2 is wetted, it sends a signal to the lower-level PLC controller. The lower-level PLC controller determines that material spraying has occurred, and thus alarms are triggered through the upper-level industrial computer.

[0022] Multiple spraying sensors 2 are provided and are evenly distributed on the beam.

[0023] The spray sensor 2 is a water immersion detection sensor.

[0024] A temperature sensor 3 is installed on the feed pump of the filter press. The temperature sensor 3 is electrically connected to the lower-level PLC controller. The temperature sensor 3 is used to detect the real-time temperature of the feed pump of the filter press and send the detected temperature signal to the lower-level PLC controller. After the lower-level PLC controller determines that the received temperature signal is higher than the temperature threshold, it determines that the feed pump of the filter press is overheating. At this time, the upper-level industrial computer will issue an alarm and lock the feed pump of the filter press to stop the machine.

[0025] In a specific implementation, it also includes a field secondary instrument box, which includes a digital display and an audible and visual alarm. Temperature sensor 3 is electrically connected to the lower-level PLC controller via the digital display, and the digital display is also electrically connected to the audible and visual alarm. The digital display can be a Hongrun digital display, which displays the temperature data in real time on-site and sends the temperature data to the lower-level PLC controller. In addition, the digital display also has an alarm output function. When the filter press feed pump overheats, it will provide an on-site warning through the audible and visual alarm connected to it.

[0026] The solution provided by this utility model embodiment allows operators to monitor the operation of each filter press and auxiliary equipment in real time through a host industrial computer, and adjust the operating parameters in real time according to production needs. This not only ensures the continuity of coal washing production, but also eliminates safety hazards during operation and improves washing efficiency.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A remote control system for a filter press in a coal preparation plant, comprising a filter press field control cabinet and a centralized control system; the filter press field control cabinet includes a touch screen and a field PLC controller, the touch screen and the field PLC controller being communicatively connected, the field PLC controller being electrically connected to electrical equipment used to achieve normal operation of the filter press; the centralized control system includes a lower-level PLC controller and a higher-level industrial computer installed in a control room and communicatively connected to each other; the lower-level PLC controller is communicatively connected to the field PLC controller; characterized in that, It also includes a black water detection device, which includes an illuminance sensor and an LED light. The illuminance sensor and the LED light are arranged opposite each other on the two sides of the filter press water tank, so that the light beam emitted by the LED light passes through the water in the filter press water tank and shines on the illuminance sensor. The illuminance sensor is electrically connected to the lower-level PLC controller.

2. The remote control system for a filter press in a coal preparation plant as described in claim 1, characterized in that, It also includes a material spraying sensor, which is installed on the main beams on both sides of the filter plate of the press and is electrically connected to the lower-level PLC controller.

3. The remote control system for a filter press in a coal preparation plant as described in claim 2, characterized in that, Multiple spraying sensors are installed and evenly distributed on the beam.

4. The remote control system for a filter press in a coal preparation plant as described in claim 3, characterized in that, The spray sensor uses a water immersion detection sensor.

5. The remote control system for a filter press in a coal preparation plant as described in claim 1, characterized in that, A temperature sensor is installed on the feed pump of the filter press, and the temperature sensor is electrically connected to the lower-level PLC controller.

6. The remote control system for a filter press in a coal preparation plant as described in claim 1, characterized in that, It also includes a field secondary instrument box, which includes a digital display and an audible and visual alarm; the temperature sensor is electrically connected to the lower-level PLC controller via the digital display, and the digital display is electrically connected to the audible and visual alarm.

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