Real-time monitoring device for water content of filter cake for coal slime filter pressing

Abstract

The utility model discloses a filter cake moisture content real-time monitoring device for coal slime filter pressing, which belongs to the technical field of coal slime filter pressing dehydration and comprises a main control chip, a main control chip minimum system, a display, a water flow sensor, an alarm module and a switch module, and the main control chip is connected with the main control chip minimum system; the display is respectively connected with the main control chip and the main control chip minimum system; the water flow sensor is respectively connected with the main control chip and the main control chip minimum system; the alarm module is respectively connected with the main control chip and the main control chip minimum system; and the switch module is respectively connected with the main control chip and the main control chip minimum system. The water flow sensor is arranged at the water outlet of the coal slime filter press to monitor the water flow velocity at the water outlet of the coal slime filter press, and the water content of the filter cake subjected to coal slime filter pressing can be obtained by combining the relationship between the water flow velocity at the water outlet of the coal slime filter press and the water content of the filter cake subjected to coal slime filter pressing. Therefore, the water content of the filter cake of coal slime filter pressing can be accurately monitored in real time.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal slime filter pressing and dehydration, and in particular relates to a real-time monitoring device for the moisture content of filter cakes of coal slime filter pressing. Background Art

[0002] Filter pressing and dewatering operations in coal preparation plants are crucial for achieving a closed-loop wash water cycle. The effectiveness of this process directly impacts coal separation efficiency and the effectiveness of supporting processes. The presence of moisture is extremely detrimental to coal utilization, not only wasting significant transportation resources but also consuming heat as it evaporates when used as fuel. During coal slime treatment and disposal, the moisture content of the filter cake is a key indicator of filtration results, and changes in this moisture content can also, to a certain extent, reflect the treatment conditions.

[0003] Currently, common methods for measuring the moisture content of filter cakes from coal slime filter presses include drying, alcohol combustion, specific gravity, microwave heating, and online moisture meter testing. The drying method is the most common, offering accurate results and ease of use. However, it is somewhat destructive. According to national standards, the drying process typically requires 24 hours, resulting in energy-intensive and non-reproducible measurements. Furthermore, it is particularly important to note that in current production, real-time monitoring of the moisture content of filter cakes from coal slime filter presses is essential for effective process monitoring.

[0004] Patent CN218636704U discloses a new type of coal slime ultra-high pressure filter press equipment, including an equipment body, a frame base, a water receiving flap, an equipment chassis, and a motor. The inner side of the equipment body is movably connected to a filter pressure plate, one end of the equipment body is movably connected to a chain transmission mechanism, one side of the equipment body is fixedly connected to the equipment chassis, the upper end of the equipment chassis is fixedly connected to the motor, one side of the equipment chassis is fixedly connected to an oil pipe, and the outer side of the equipment chassis is fixedly connected to a delivery pipe.

[0005] However, the technology disclosed in the above patents and the existing technology are unable to accurately monitor the moisture content of the filter cake of the coal slime filter press in real time. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a real-time monitoring device for the moisture content of filter cakes of coal slime filter presses in view of the deficiencies of the existing technology, so as to achieve the purpose of being able to monitor the moisture content of filter cakes of coal slime filter presses in real time and accurately.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] The utility model provides a real-time monitoring device for the moisture content of filter cakes of coal slime filter press, comprising a main control chip, a main control chip minimum system, a display, a water flow sensor, an alarm module, and a switch module, wherein the main control chip is connected to the main control chip minimum system; the display is respectively connected to the main control chip and the main control chip minimum system; the water flow sensor is respectively connected to the main control chip and the main control chip minimum system; the alarm module is respectively connected to the main control chip and the main control chip minimum system; and the switch module is respectively connected to the main control chip and the main control chip minimum system.

[0009] Furthermore, the minimum system of the main control chip includes a power supply, a reset circuit and a clock circuit, and the power supply is respectively connected to the reset circuit and the clock circuit; the main control chip is respectively connected to the power supply, the reset circuit and the clock circuit; the display is respectively connected to the main control chip and the power supply; the water flow sensor is respectively connected to the main control chip and the power supply; the alarm module is respectively connected to the main control chip and the power supply; and the switch module is respectively connected to the main control chip and the power supply.

[0010] Furthermore, the alarm module includes a light emitting diode and an active buzzer, wherein the positive electrode of the light emitting diode is connected to the positive electrode of the active buzzer; and the negative electrode of the light emitting diode is connected to the negative electrode of the active buzzer.

[0011] Furthermore, the switch module includes a minimum flow rate limit increasing switch and a minimum flow rate limit decreasing switch. The minimum flow rate limit increasing switch is connected to the main control chip; the minimum flow rate limit decreasing switch is connected to the main control chip.

[0012] Furthermore, a water flow sensor is arranged at the water outlet of the coal slime filter press.

[0013] Furthermore, when the main control chip determines that the water flow rate at the water outlet of the coal slime filter press is lower than the set minimum water flow rate, the main control chip controls the alarm module to alarm.

[0014] Furthermore, the set minimum water flow rate is 0.5 liters per second.

[0015] The filter cake moisture content real-time monitoring device of the utility model has the following advantages:

[0016] (1) The utility model relates to a device for monitoring the moisture content of a filter cake of coal slime filter press in real time, which can achieve the purpose of accurately monitoring the moisture content of a filter cake of coal slime filter press in real time.

[0017] (2) The utility model of the real-time monitoring device for the moisture content of the filter cake of the coal slime filtration can realize accurate real-time monitoring of the moisture content of the filter cake of the coal slime filtration and can also realize accurate control of the time of the coal slime filtration.

[0018] (3) The utility model of the real-time monitoring device for the moisture content of the filter cake of the coal slime filtration can reduce the unnecessary waste of coal slime filtration time, and has a positive effect on energy conservation and emission reduction in the coal washing industry and cost reduction and efficiency improvement of enterprises.

[0019] (4) The real-time monitoring device for the moisture content of the filter cake of the coal slime filter press of the present invention can reduce the labor intensity of workers to the greatest extent, improve the operating efficiency of the coal slime filter press, reduce unnecessary energy consumption, and also help to improve the backward situation of intelligence and automation of coal preparation plants.

[0020] (5) The device for real-time monitoring the moisture content of the filter cake of the coal slime filter press of the present invention has an alarm module. When the main control chip determines that the water flow rate at the water outlet of the coal slime filter press is lower than the set minimum water flow rate, the alarm module will alarm to remind relevant personnel that the moisture content of the filter cake of the coal slime filter press has reached the requirements of the coal preparation plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] This manual includes the following drawings, which show the following contents:

[0022] Figure 1 This is a structural diagram of a device for real-time monitoring the moisture content of filter cakes in a coal slime filter press of the present invention;

[0023] Figure 2 The utility model is a circuit principle diagram of a device for real-time monitoring the moisture content of filter cakes in coal slime filter pressing.

[0024] Explanation of the accompanying symbols: 1. Main control chip; 3. Display; 4. Water flow sensor; 5. Alarm module; 6. Switch module; 21. Power supply; 22. Reset circuit; 23. Clock circuit; 51. Light-emitting diode; 52. Active buzzer; 61. Minimum flow rate limit increase switch; 62. Minimum flow rate limit decrease switch; 211. Power switch; 221. Reset switch; 611. Minimum flow rate limit increase button; 621. Minimum flow rate limit decrease button; 2111. Power switch button; 2211. Reset switch button. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and to facilitate its implementation.

[0026] Figure 1This is a structural diagram of a real-time monitoring device for the moisture content of filter cakes in a coal slime filter press of the present invention, comprising a main control chip 1, a main control chip minimum system, a display 3, a water flow sensor 4, an alarm module 5, and a switch module 6. The main control chip minimum system comprises a power supply 21, a reset circuit 22, and a clock circuit 33; the alarm module 5 comprises a light-emitting diode 51 and an active buzzer 52; and the switch module 6 comprises a flow rate minimum limit increase switch 61 and a flow rate minimum limit decrease switch 62. Furthermore, Figure 1 The main control chip 1 and the water flow sensor 4 are connected by a signal line, and the water flow sensor 4 is arranged at the water outlet of the coal slime filter press.

[0027] Figure 2 This is a circuit schematic diagram of a device for real-time monitoring moisture content of filter cakes of a coal slime filter press of the present invention, wherein the power supply 21 is connected to the reset circuit 22 and the clock circuit 23 respectively; the main control chip 1 is connected to the main control chip minimum system, specifically, the main control chip 1 is connected to the power supply 21, the reset circuit 22 and the clock circuit 23 respectively; the display 3 is connected to the main control chip 1 and the main control chip minimum system respectively, specifically, the display 3 is connected to the main control chip 1 and the power supply 21 respectively; the water flow sensor 4 is connected to the main control chip 1 and the main control chip minimum system respectively, specifically, the water flow sensor 4 is connected to the main control chip 1 and the power supply 21 respectively; the alarm module 5 is connected to the main control chip 1 and the main control chip minimum system respectively, specifically, the alarm module 5 is connected to the main control chip 1 and the power supply 21 respectively; the switch module 6 is connected to the main control chip 1 and the main control chip minimum system respectively, specifically, the switch module 6 is connected to the main control chip 1 and the power supply 21 respectively. In addition, Figure 2 It can be seen that: the positive electrode of the light-emitting diode 51 is connected to the positive electrode of the active buzzer 52, the negative electrode of the light-emitting diode 51 is connected to the negative electrode of the active buzzer 52, the flow rate minimum limit increase switch 61 is connected to the main control chip 1, and the flow rate minimum limit decrease switch 62 is connected to the main control chip 1.

[0028] refer to Figure 2 ,Depend on Figure 2 It can be seen that: in addition to being connected to the main control chip 1 and the power supply 21, the display 3 is also connected to one end of the resistor R1, and the other end of the resistor R1 is grounded, wherein the resistance value of the resistor R1 is 2000 ohms; in addition to including the light-emitting diode 51 and the active buzzer 52, the alarm module 5 also includes a resistor R2 and a PNP transistor Q1, one end of the resistor R2 is connected to the cathode of the light-emitting diode 51, the other end of the resistor R2 is connected to the cathode of the active buzzer 52 and is grounded, the anode of the light-emitting diode 51 is connected to the anode of the active buzzer 52 and is connected to the collector of the PNP transistor Q1, and the base of the PNP transistor Q1 is connected to the main control chip 1, and the emitter of the PNP transistor Q1 is connected to the anode of the power supply 21, wherein the resistance value of the resistor R2 is 2000 ohms. In addition, Figure 2 The power supply 21, reset circuit 22 and clock circuit 23 in the main control chip 1 constitute the minimum system (main control chip minimum system). The electronic components used in the main control chip minimum system and the connection relationship between the electronic components used can be represented by Figure 2 Clearly drawn.

[0029] refer to Figure 2 In this embodiment, the main control chip 1 is an STC89C52 single-chip microcomputer chip, and the display 3 is an LCD1602 display. However, the main control chip 1 and display 3 in the present invention are not limited to the STC89C52 single-chip microcomputer chip and the LCD1602 display. Instead, a main control chip 1 and display 3 having the same functions as the STC89C52 single-chip microcomputer chip and the LCD1602 display can be used.

[0030] In this embodiment, the relationship between the water flow rate at the outlet of the coal slime filter press and the moisture content of the filter cake from the coal slime filter press is obtained by fitting the Boltzmann function using Origin (function plotting software). The Boltzmann fitting principle is a statistical method for fitting data and has been widely used in research and applications in various fields. Its foundation is the Boltzmann distribution principle. By applying the Boltzmann fitting method, parameters corresponding to the Boltzmann distribution are extracted from the actual data, and then the data are analyzed and predicted. Finally, it is obtained that the relationship between the water flow rate at the outlet of the coal slime filter press and the moisture content of the filter cake of the coal slime filter press is Y=A2+(A1-A2) / (1+exp((X-B1) / B2)), where Y represents the moisture content of the filter cake of the coal slime filter press, X represents the water flow rate at the outlet of the coal slime filter press, exp represents the exponential function with the natural constant e as the base, A1, A2, B1, and B2 are constants, A1 is 25.39, A2 is 56.55, B1 is 10.38, and B2 is 1.21.

[0031] Figure 2 The minimum flow rate limit increase switch 61 corresponds to Figure 1 The flow rate minimum limit increase button 611; Figure 2 The flow rate minimum limit reduction switch 62 corresponds to Figure 1 The flow rate minimum limit reduction button 621; Figure 2 The power switch 211 corresponds to Figure 1 The power switch button 2111; Figure 2 The reset switch 221 corresponds to Figure 1 The reset switch button 2211 in.

[0032] The following combination Figure 1 and Figure 2The working principle of the present invention is as follows: the device of the present invention is powered on by pressing the power switch button 2111. Before monitoring the water flow rate at the water outlet of the coal slime filter press through the device of the present invention, it is necessary to first set the minimum water flow rate based on the relationship between the water flow rate at the water outlet of the coal slime filter press and the moisture content of the filter cake of the coal slime filtration, as well as the minimum value of the moisture content of the filter cake of the coal slime filtration required by the coal preparation plant. The minimum water flow rate set in the present invention is 0.5 liters per second (which is also the initial value of the minimum water flow rate set in the present invention). However, the minimum water flow rate is not limited to 0.5 liters per second, but can be set according to specific actual conditions; the minimum water flow rate can also be adjusted by the minimum flow rate limit increase button 611 and the minimum flow rate limit decrease button 621 on the device of the present invention; in addition, when you want to readjust the minimum water flow rate, you only need to press the reset switch button 2211 to restore the set minimum water flow rate to the initial value, and then you can readjust the minimum water flow rate. When the coal slime filter press of the coal selection plant starts filtering, the water flow sensor 4 in the device of the utility model is arranged at the water outlet of the coal slime filter press. When the water flow sensor 4 detects the water flow at the water outlet of the coal slime filter press, the main control chip 1 will start working. At the same time, the main control chip 1 will judge the difference between the water flow rate at the water outlet of the coal slime filter press fed back by the water flow sensor 4 and the set minimum water flow rate, and control the display 3 to display the water flow rate at the water outlet of the coal slime filter press and the set minimum water flow rate. Specifically, when the water flow sensor 4 detects the water flow at the water outlet of the coal slime filter press, the STC89C52 single-chip microcomputer chip will start working. The STC89C52 single-chip microcomputer chip will judge the difference between the water flow rate at the water outlet of the coal slime filter press fed back by the water flow sensor 4 and the set minimum water flow rate, and control the LCD1602 display to display the water flow rate value at the water outlet of the coal slime filter press at the current moment on the first line of its screen, and control the LCD1602 display to display the set minimum water flow rate value on the second line of its screen. As the filtration work of the coal slime filter press proceeds, when the main control chip 1 determines that the water flow rate at the water outlet of the coal slime filter press is lower than the set minimum water flow rate, the main control chip 1 controls the alarm module 5 to alarm. Specifically, as the filtration work of the coal slime filter press proceeds, the moisture content of the filter cake of the coal slime filtration becomes smaller and smaller, and the water flow rate at the water outlet of the coal slime filter press will also become smaller and smaller. When the STC89C52 single-chip microcomputer chip determines that the water flow rate at the water outlet of the coal slime filter press is lower than the set minimum water flow rate, the STC89C52 single-chip microcomputer chip will control the alarm module 5 to alarm, wherein the alarm module 5 alarms by the light-emitting diode 51 in the alarm module 5 continuously flashing and the active buzzer 52 in the alarm module 5 sounding an alarm.When the light emitting diode 51 flashes continuously and the active buzzer 52 in the alarm module 5 sounds an alarm, it reminds the relevant personnel that the moisture content of the filter cake of the coal slime filtration has reached the minimum value required by the coal preparation plant, and the coal slime filter press can be turned off. At the same time, the monitoring device of the utility model can be turned off by pressing the power switch button 2111, and the entire filtration work is completed.

[0033] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. A real-time monitoring device for the moisture content of filter cakes in coal slime filter press, characterized by: It includes a main control chip, a main control chip minimum system, a display, a water flow sensor, an alarm module, and a switch module. The main control chip is connected to the main control chip minimum system; the display is respectively connected to the main control chip and the main control chip minimum system; the water flow sensor is respectively connected to the main control chip and the main control chip minimum system; the alarm module is respectively connected to the main control chip and the main control chip minimum system; and the switch module is respectively connected to the main control chip and the main control chip minimum system.

2. The device for real-time monitoring of the moisture content of filter cakes in coal sludge filter press according to claim 1, characterized in that: The minimum system of the main control chip includes a power supply, a reset circuit and a clock circuit, the power supply is respectively connected to the reset circuit and the clock circuit; the main control chip is respectively connected to the power supply, the reset circuit and the clock circuit; the display is respectively connected to the main control chip and the power supply; the water flow sensor is respectively connected to the main control chip and the power supply; the alarm module is respectively connected to the main control chip and the power supply; and the switch module is respectively connected to the main control chip and the power supply.

3. The device for real-time monitoring of the moisture content of filter cakes in coal sludge filter press according to claim 2, characterized in that: The alarm module includes a light emitting diode and an active buzzer, wherein the positive electrode of the light emitting diode is connected to the positive electrode of the active buzzer; and the negative electrode of the light emitting diode is connected to the negative electrode of the active buzzer.

4. The device for real-time monitoring of the moisture content of filter cakes in coal sludge filter press according to claim 2, characterized in that: The switch module includes a flow rate minimum limit increasing switch and a flow rate minimum limit decreasing switch. The flow rate minimum limit increasing switch is connected to the main control chip; the flow rate minimum limit decreasing switch is connected to the main control chip.

5. The device for real-time monitoring of the moisture content of filter cakes in coal sludge filter press according to claim 2, characterized in that: The water flow sensor is arranged at the water outlet of the coal slime filter press.

6. The device for real-time monitoring of the moisture content of filter cakes in coal sludge filter press according to claim 5, characterized in that: When the main control chip determines that the water flow rate at the water outlet of the coal slime filter press is lower than the set minimum water flow rate, the main control chip controls the alarm module to alarm.

7. The device for real-time monitoring of the moisture content of filter cakes in coal sludge filter press according to claim 6, characterized in that: The minimum water flow rate set is 0.5 liters per second.

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