CN113730970A - A intelligent monitoring devices of rivers and pressure filter feeding control system for coal washing - Google Patents
A intelligent monitoring devices of rivers and pressure filter feeding control system for coal washing Download PDFInfo
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- CN113730970A CN113730970A CN202111143849.0A CN202111143849A CN113730970A CN 113730970 A CN113730970 A CN 113730970A CN 202111143849 A CN202111143849 A CN 202111143849A CN 113730970 A CN113730970 A CN 113730970A
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- B01D25/003—Filters formed by clamping together several filtering elements or parts of such elements integrally combined with devices for controlling the filtration
- B01D25/005—Filters formed by clamping together several filtering elements or parts of such elements integrally combined with devices for controlling the filtration by flow measuring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D25/30—Feeding devices ; Discharge devices
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Abstract
The application provides a rivers intelligent monitoring devices and pressure filter feeding control system for washing coal, wherein, a rivers intelligent monitoring devices for washing coal includes: the double-electrode module is arranged at a preset position of a water outlet of the filter press, so that filtrate of the filter press flows through the double-electrode module, and the double-electrode module is in a conducting state; the monitoring processing module is connected with the double-electrode module and is used for acquiring a voltage signal of the double-electrode module in real time and sending the voltage signal to a filter press feeding control system; wherein the voltage signal is used for instructing the filter press feeding control system to determine the water flow of the filter press water outlet. The scheme can realize the intelligent monitoring of the water flow for coal washing, and has low realization cost and easy maintenance.
Description
Technical Field
The application relates to the field of coal slime water treatment, in particular to the field of data processing, and especially relates to an intelligent monitoring device for water flow for coal washing and a filter press feeding control system.
Background
The filter press is a single filtering device, uses filter cloth as a filtering medium, uses a feeding pump as filtering power, conveys materials into the filter press through the feeding pump, and realizes the separation of solid and liquid of the materials by utilizing the hole distances of different meshes of the filter cloth. In the process of washing coal, because the coal slime is a material which is very easy to absorb water, the coal slime after being filter-pressed by using a plate-and-frame filter press can not be completely dried theoretically, so that the material feeding end can be generally used as the filter-pressing end.
The end of material feeding can be judged at present according to the following two points: the feed pressure has reached the upper set feed pressure limit; the amount of liquid discharged from the filter plate is obviously reduced. However, the above two points can be usually judged only by the filter press driver according to experience, and the filter press has low efficiency and even coal slurry deterioration to influence coal washing production due to different filter press driver experiences, differences in operation habits, large coal quality condition changes and the like.
Disclosure of Invention
The application provides a rivers intelligent monitoring devices and pressure filter feeding control system for coal washing, aims at solving one of the technical problem among the correlation technique to a certain extent at least.
According to a first aspect of the application, a water flow intelligent monitoring device for coal washing is provided, comprising:
the double-electrode module is arranged at a preset position of a water outlet of the filter press, so that filtrate of the filter press flows through the double-electrode module, and the double-electrode module is in a conducting state;
the monitoring processing module is connected with the double-electrode module and is used for acquiring a voltage signal of the double-electrode module in real time and sending the voltage signal to a filter press feeding control system; wherein the voltage signal is used for instructing the filter press feeding control system to determine the water flow of the filter press water outlet.
In some embodiments of the present application, the monitoring processing module comprises:
the voltage division circuit unit is used for being connected with the double-electrode module to form a voltage division circuit;
and the signal acquisition unit is used for acquiring voltage signals of the double-electrode module in the voltage division circuit in real time and sending the acquired voltage signals to the filter press feeding control system.
In some embodiments of the present application, the monitoring processing module further comprises:
the signal conversion unit is connected with the signal acquisition unit and is used for converting the acquired voltage signal into a pulse signal and sending the pulse signal to the filter press feeding control system;
the signal acquisition unit is used for acquiring voltage signals of the double-electrode module in the voltage division circuit in real time and transmitting the acquired voltage signals to the signal conversion unit.
Further, in some embodiments of the present application, the monitoring processing module further comprises:
the filtering unit is connected with the signal acquisition unit and is used for filtering the acquired voltage signal;
the attenuation unit is connected with the filtering unit and used for carrying out attenuation processing on the filtered voltage signal according to the port requirement of the signal conversion unit and sending the processed voltage signal to the signal conversion unit;
the signal acquisition unit is used for acquiring voltage signals of the double-electrode module in the voltage division circuit in real time and sending the acquired voltage signals to the filtering unit.
As an implementation, the filtering unit includes:
the filter circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor and an operational amplifier, wherein one end of the first resistor is connected with the input end of the voltage signal, and the output end of the operational amplifier is the output end of the filter unit; wherein
The other end of the first resistor is connected with the first end of the second resistor, and the second end of the second resistor is connected with the positive input end of the operational amplifier;
one end of the first capacitor is connected with the first end of the second resistor, and the other end of the first capacitor is connected with the output end of the operational amplifier;
one end of the second capacitor is connected with the positive input end of the operational amplifier, and the other end of the second capacitor is grounded;
the first end of the third resistor is connected with the output end of the operational amplifier, the second end of the third resistor is respectively connected with the inverting input end of the operational amplifier and one end of the fourth resistor, and the other end of the fourth resistor is grounded.
As an implementation, the attenuation unit includes:
a first resistor and a second resistor, wherein
The first end of the first resistor is connected with the output end of the filtering unit, and the second end of the first resistor is used as the output end of the attenuation unit;
one end of the second resistor is connected with the second end of the first resistor, and the other end of the second resistor is grounded.
In some embodiments of the present application, the monitoring processing module further comprises:
the signal following unit is connected with the attenuation unit and is used for buffering the voltage signal and sending the processed voltage signal to the signal conversion unit;
the attenuation unit is connected with the filtering unit and used for carrying out attenuation processing on the filtered voltage signal according to the port requirement of the signal conversion unit and sending the processed voltage signal to the signal buffering unit.
In some embodiments of the present application, the two-electrode module comprises a two-electrode; the double electrode is two metal probes.
According to a second aspect of the present application, there is provided a filter press feed control system comprising:
the intelligent monitoring device for the water flow for coal washing of the first aspect;
and the control module is connected with the intelligent water flow monitoring device and used for receiving the voltage signal sent by the intelligent water flow monitoring device and controlling the feeding of the filter press according to the voltage signal.
In some embodiments of the present application, the control module is specifically configured to:
receiving the voltage signal, and determining the water flow of the water outlet of the filter press according to the voltage signal;
in response to the water flow rate being below a preset threshold, ending the feeding of the filter press.
According to the technical scheme of this application, through the voltage signal of gathering the bipolar electrode module in real time, the impedance state of representation bipolar electrode module, when utilizing the pressure filter filtrating to flow through the bipolar electrode, the impedance value of bipolar electrode changes to the voltage signal that can use the bipolar electrode module of gathering in real time comes the discharge of representation pressure filter delivery port, has just also realized the intelligent monitoring of rivers of coal washing, and this scheme implementation cost is low simultaneously, and easy the maintenance. In addition, through the system control to the intelligent monitoring of coal washing rivers can realize the pressure filter feeding, also can avoid artifical mode to judge the subjective influence that the feeding ended, based on real-time supervision rivers and water droplet state, carry out systematic adjustment, can improve the filter-pressing effect effectively, also can guarantee the quality of filter-pressing back product simultaneously.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a block diagram of an intelligent monitoring device for water flow for coal washing provided in an embodiment of the present application;
FIG. 2 is a schematic view of water flow or water droplets through a dual electrode module according to an embodiment of the present disclosure;
FIG. 3 is a block diagram of another water flow intelligent monitoring device for coal washing provided by an embodiment of the present application;
FIG. 4 is a schematic circuit diagram of a monitor processing module according to an embodiment of the present application;
FIG. 5 is a block diagram of a water flow intelligent monitoring device for coal washing according to an embodiment of the present application;
FIG. 6 is a circuit diagram of a filter unit according to an embodiment of the present disclosure;
FIG. 7 is a circuit diagram of another exemplary monitor processing module according to an embodiment of the present disclosure;
FIG. 8 is a circuit diagram of another exemplary monitor processing module according to an embodiment of the present disclosure;
fig. 9 is a block diagram of a filter press feed control system according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The intelligent monitoring device for water flow of coal washing and the filter press feeding control system are described below with reference to the accompanying drawings.
The filter press is a single filter device, the filter cloth is used as a filter medium, the feed pump is used as a filter power, the material is conveyed into the filter press through the feed pump, and the separation of solid and liquid of the material is realized by utilizing the hole distances of different meshes of the filter cloth. In the process of washing coal, because the coal slime is a material which is very easy to absorb water, the coal slime after being filter-pressed by using a plate-and-frame filter press can not be completely dried theoretically, so that the material feeding end can be generally used as the filter-pressing end.
Therefore, the material feeding end can be judged according to the following two points: the feed pressure has reached the upper set feed pressure limit; the amount of liquid discharged from the filter plate is obviously reduced. However, the above two points can be usually judged only by the filter press driver according to experience, and the filter press has low efficiency and even coal slurry deterioration to influence coal washing production due to different filter press driver experiences, differences in operation habits, large coal quality condition changes and the like.
In order to reduce the influence of artificial subjective factors, the filter press process is judged to be finished by detecting the water yield of a filter plate water outlet of the filter press at present. For example, the lowest water level of a filtrate water tank of the filter press is detected by using a liquid level relay, or the flow data of a water outlet is detected in real time by adopting an external-clamping type ultrasonic flowmeter, when the water level of the filtrate water tank is too low or the flow of the water outlet of a filter plate is lower than a preset value, the feeding is judged to be finished, the pump is automatically stopped, then the flows of squeezing, blowing, emptying, discharging and the like are automatically carried out, and after the discharging is finished, the filter press is automatically compressed to wait for the next use. But the above mode is relatively high in implementation cost and not easy to maintain in the later period.
Based on the above problem, the embodiment of the application provides a monitoring devices is examined to rivers intellectuality for coal washing.
Fig. 1 is a structural block diagram of an intelligent monitoring device for water flow for coal washing provided by an embodiment of the present application. As shown in fig. 1, the apparatus includes a two-electrode module 110 and a monitoring processing module 120. The device can be used in the scene that the coal slurry water is subjected to solid-liquid separation through the filter press in the coal washing process.
In the embodiment of the present application, the dual-electrode module 110 is disposed at a predetermined position of the outlet of the filter press, so that the dual-electrode module is in a conducting state when the filtrate of the filter press passes through the dual-electrode module 110. The monitoring processing module 120 is connected with the double-electrode module 110 and is used for acquiring a voltage signal of the double-electrode module 110 in real time and sending the voltage signal to a filter press feeding control system; wherein the voltage signal is used for indicating the filter press feeding control system to determine the water flow of the water outlet of the filter press. Therefore, the filter press feeding control system can determine the water flow of the water outlet of the filter press according to the received voltage signal, and timely control the filter press to finish feeding when the water flow is smaller than a preset threshold value.
In some embodiments of the present application, the dual-electrode module 110 may include a dual-electrode, and the dual-electrode is two metal probes. It can be understood that, in the case that no water passes between the two metal probes, a high-resistance state with infinite impedance is presented between the two metal probes; under the condition that water flows through the two probes, the two metal probes are conducted due to the conductivity of the water and have certain impedance, so that the impedance between the two metal probes can be changed due to the change of the water flow flowing through the two metal probes, and if the double electrodes are connected in a circuit, the impedance state between the two metal probes can be represented through voltage signals of the double electrodes, and then the water flow state flowing through the two metal probes can be further represented.
That is, if the filtrate at the outlet of the filter press is slowed down to a water drop state by the water flow, the conduction between the two metal probes becomes intermittent. When the water drop passes through the two metal probes, the conduction is carried out, and when no water drop exists, the two metal probes are in a high-resistance state.
In some embodiments of the present application, in order to allow the filtrate at the outlet of the filter press to flow through the bipolar electrode module, the bipolar electrode module is disposed at a predetermined position of the outlet of the filter press, so that the filtrate in the form of water flow or the filtrate in the form of water drops at the outlet of the filter press can flow through the bipolar electrode module. In practical applications, the preset position may be determined according to an actual usage scenario, which is not limited in the present application.
Fig. 2 is a schematic view of water flow or water droplets through a two-electrode module in an embodiment of the present application. As shown in fig. 2, two metal probes constituting a dual electrode in a dual-electrode module are disposed in parallel, and the relative positions of the two metal probes need to satisfy a certain condition, which includes: it is desirable that the water droplets passing through the two metal probes can pass through relatively simultaneously, that is, the residence time of the water droplets passing through between the two metal probes cannot exceed a preset threshold value, so that the time difference of the same water droplet passing through the two metal probes is not too large. In practical application, specific relative positions of the two metal probes can be determined according to practical scenes, and the method is not limited in the application.
In one embodiment, as shown in fig. 1, the monitoring processing module 120 is connected to the two-electrode module 110, such that the two-electrode module 110 is connected in a closed loop (e.g., a voltage divider circuit). The circuit may include an accessed supply voltage, a resistor, etc. Since the resistance value of the dual-electrode module 110 varies with the state of the water flow passing therethrough, the voltage signal of the dual-electrode module 110 also varies with the variation of the resistance value. As an example, the monitoring processing module 120 may include a signal collecting unit, which collects the voltage signal of the dual-electrode module in real time and sends the collected voltage signal to the filter press feeding control system; the filter press feeding control system can determine the water flow of the water outlet of the filter press according to the received voltage signal, for example, when the water drop state of the filter process is in a filtering state, the time interval of the water drop can be determined according to the time interval of the high voltage gradient and the low voltage gradient in the voltage signal, so that the water flow of the water outlet of the filter press is determined, and the real-time monitoring of the coal washing water flow is realized.
According to the intelligent monitoring devices of rivers for washing coal of this application embodiment, through setting up the position of predetermineeing with bipolar electrode module at the pressure filter delivery port, make pressure filter filtrating can flow through bipolar electrode module, and make it be in the conducting state when filtrating through bipolar electrode module. Meanwhile, the change of the impedance value of the double electrodes is utilized, the monitoring processing module is connected with the double electrode module, and the voltage signal of the double electrode module is collected in real time to represent the water flow of the water yield of the filter press, so that the feed control system of the filter press can monitor the water flow condition of coal washing in real time, and a foundation is provided for the intelligent control of the feed control system of the filter press. In addition, the scheme has the advantages of low implementation cost, easiness in maintenance and higher application value.
The device will be described in detail with reference to the working principle of the monitoring processing module.
Fig. 3 is a block diagram of another water flow intelligent monitoring device for coal washing provided by the embodiment of the application. The device comprises a double-electrode module 310 and a monitoring processing module 320, wherein the monitoring processing module 320 comprises a voltage dividing circuit unit 321 and a signal acquisition unit 322, and the double-electrode module 310 in the embodiment of the application has the same functional structure as the embodiment.
In the embodiment of the present application, the voltage dividing circuit unit 321 is used to connect with the two-electrode module 310 to form a voltage dividing circuit. The signal acquisition unit 322 is used for acquiring the voltage signal of the double-electrode module 310 in the voltage division circuit in real time and sending the acquired voltage signal to the feeding control system of the filter press.
As an example, as shown in fig. 4, the voltage dividing circuit unit may include a voltage dividing resistor and a connection voltage, the connection voltage may be a safe voltage dc 5V, and the voltage dividing circuit unit is connected to the two-electrode module to form a voltage dividing circuit as shown in fig. 4. Thus, after the double electrodes are connected into the circuit, the voltage signals on the two sides of the double electrodes are changed along with the change of the impedance values of the double electrodes. Because the negative plate is grounded in the double-electrode, voltage signals at the joint of the positive plate are voltage signals at two sides of the double-electrode, and the signal acquisition unit is connected to one end of the double-electrode positive plate to acquire the voltage signals.
In order to make the voltage signal received by the filter press feeding control system easier to process, as shown in fig. 3, the monitoring processing module 320 of the apparatus may further include a signal conversion unit 323, and the signal conversion unit 323 is connected to the signal acquisition unit 322 and is configured to convert the acquired voltage signal into a pulse signal and send the pulse signal to the filter press feeding control system; the signal acquisition unit 322 is configured to acquire a voltage signal of a dual-electrode module in the voltage divider circuit in real time, and transmit the acquired voltage signal to the signal conversion unit 323.
In some embodiments of the present disclosure, the signal conversion unit 323 may be a micro control unit mcu (microcontroller unit), and performs AD (Analog Digital, Analog signal and Digital signal) conversion on the received voltage signal to obtain a pulse signal. Because the system processing parameters are digital, the pulse signals are obtained by AD conversion of the acquired voltage signals, and the filter press feeding control system is convenient to monitor the water flow.
As an example, if the pulse signal received by the filter press feeding control system is always at a low level, it indicates that the filtrate at the water outlet of the filter press is in a water flow state, the water content of the material in the filter plate is high, and the feeding needs to be continued; if the high and low levels of the middle pulse signal alternately appear, the filtrate at the water outlet of the filter press is in a water droplet form, the interval duration of the water droplets can be determined according to the time interval of the high and low levels, and if the duration exceeds a preset threshold, the current filter press is determined to be finished, and a control instruction is sent.
According to the intelligent monitoring devices of rivers for washing coal of this application embodiment, be connected through the bleeder circuit unit among the monitoring processing module and bipolar electrode module and form bleeder circuit, because the change of filtrate water flow state can make bipolar electrode impedance value change, then bipolar electrode module's voltage signal is along with changing, thereby can gather bipolar electrode module's voltage signal in real time through signal acquisition unit and come the discharge of representation pressure filter water yield, make the pressure filter feeding control system can the real-time supervision wash the rivers condition of coal. In addition, by introducing the signal conversion unit, the acquired voltage signal is converted into a pulse signal, so that the water flow of the water yield of the filter press can be determined by the filter press feeding control system according to the pulse signal, the calculation expense of the filter press feeding control system can be saved, and the water flow monitoring efficiency is improved.
In order to further improve the accuracy of the acquired signals, the present application proposes yet another embodiment.
Fig. 5 is a block diagram of a water flow intelligent monitoring device for coal washing according to an embodiment of the present application. As shown in fig. 5, on the basis of the above embodiment, the monitoring processing module 520 in the apparatus may further include a filtering unit 524 and an attenuation unit 525, wherein the dual-electrode module 510, the voltage dividing circuit unit 521, the signal acquisition unit 522, and the signal conversion unit 523 in the apparatus are consistent with the above embodiment and are not described herein again.
In the embodiment of the present application, the filtering unit 524 is connected to the signal acquiring unit 522, and is configured to perform filtering processing on the acquired voltage signal. The attenuating unit 525 is connected to the filtering unit 524, and is configured to perform attenuation processing on the filtered voltage signal according to a port requirement of the signal converting unit 523, and send the processed voltage signal to the signal converting unit 523. The signal acquisition unit 522 is configured to acquire a voltage signal of a dual-electrode module in the voltage divider circuit in real time, and send the acquired voltage signal to the filtering unit 524. It should be noted that, in order to reduce the influence of voltage attenuation in the circuit on the monitoring result, the gain of the filtering unit 524 may be set to a value greater than 1, for example, 1.1.
For example, as shown in fig. 6, the filtering unit 524 may be a low-pass filter composed of a resistor, a capacitor and an operational amplifier, and includes: the filter comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2 and an operational amplifier, wherein one end of the first resistor R1 is connected with the input end of a voltage signal, and the output end of the operational amplifier is the output end of the filter unit; the other end of the first resistor R1 is connected with the first end of the second resistor R2, and the second end of the second resistor R2 is connected with the positive input end of the operational amplifier; one end of the first capacitor C1 is connected with the first end of the second resistor R2, and the other end of the first capacitor C1 is connected with the output end of the operational amplifier; one end of the second capacitor C2 is connected with the positive input end of the operational amplifier, and the other end of the second capacitor C2 is grounded; a first end of the third resistor R3 is connected to the output terminal of the operational amplifier, a second end of the third resistor R3 is connected to the inverting input terminal of the operational amplifier and one end of the fourth resistor R4, respectively, and the other end of the fourth resistor R4 is grounded.
In order to match the voltage signal transmitted to the signal conversion unit 523 with the requirement of the port of the signal conversion unit 523 for voltage, the attenuation unit 525 may constitute an attenuation circuit by two resistors. Based on the above example, as shown in fig. 7, the attenuation unit includes: a first resistor R5 and a second resistor R6, wherein a first end of the first resistor R5 is connected with the output end of the filter unit, and a second end of the first resistor R5 is used as the output end of the attenuation unit; one end of the second resistor R6 is connected to the second end of the first resistor R5, and the other end of the second resistor R6 is grounded. For example, if the first resistor R5 and the second resistor R6 are equal, the output of the attenuation unit is 50% of the original signal amplitude.
In order to further improve the accuracy of the voltage signal, as shown in fig. 5, the monitoring processing module 520 of the apparatus may further include a signal buffering unit 526, where the signal buffering unit 526 is connected to the attenuating unit 525, and is configured to buffer the voltage signal and send the processed voltage signal to the signal converting unit 523; the attenuating unit 525 is configured to perform an attenuation process on the filtered voltage signal according to a port requirement of the signal converting unit 523, and send the processed voltage signal to the signal buffering unit 526. As an example, the signal buffer unit 526 may be a voltage follower, which reduces signal loss by the characteristics of high input impedance and low output impedance.
In addition, the monitoring processing module 520 may further include a protection circuit to ensure the safety of the circuit, usually when collecting the voltage signal. As an example, a circuit diagram of the monitoring processing module 520 may be as shown in fig. 8.
According to the intelligent monitoring devices of rivers for washing coal of this application embodiment, through introducing the filtering unit, carry out filtering treatment to the voltage signal who gathers, can improve the accuracy nature of gathering the signal. Meanwhile, an attenuation module is introduced, and the voltage signal after filtering is subjected to attenuation processing through the attenuation module, so that the processed voltage signal is matched with a port of the signal processing unit, and the stability of voltage signal transmission is guaranteed. In addition, the voltage signal after the processing passes through the signal buffer unit, can reduce the loss of voltage signal to can further improve the accuracy nature of the voltage signal who gathers, and then can improve the accuracy of the monitoring of coal washing rivers.
In order to implement the above embodiments, the present application provides a filter press feed control system.
Figure 9 is a filter press feed control system according to an embodiment of the present application. As shown in fig. 9, the system includes an intelligent monitoring device 910 for coal washing water flow and a control module 920 connected to the intelligent monitoring device 910 for coal washing water flow. In the embodiment of the present application, the intelligent monitoring device 910 for coal washing water flow is used in any of the embodiments described above.
The control module 920 is configured to receive a voltage signal sent by the intelligent water flow monitoring device, and control feeding of the filter press according to the received voltage signal.
In some embodiments of the present application, the control module 920 is specifically configured to: receiving the voltage signal, and determining the water flow of the water outlet of the filter press according to the voltage signal; in response to the water flow rate being below the preset threshold, the feeding of the filter press is terminated.
As an example, when the control module receives the voltage signal, if the voltage signal is always in a low voltage gradient, it indicates that the dual-electrode module is currently in a conducting state, that is, the filtrate at the water outlet of the filter press is currently in a water flow state, and the feeding needs to be continued; if the voltage signal is that the low voltage gradient and the high voltage gradient alternately appear, it indicates that the current double-electrode module is in an intermittent conduction state, that is, the filtrate at the water outlet of the filter press is in a water drop state, the water flow at the current water outlet can be calculated according to the time interval between the low voltage gradient and the high voltage gradient, and if the water flow is lower than a preset threshold, the feeding of the filter press is ended.
As another example, the control module converts the voltage signal into a pulse signal after receiving the voltage signal, and if the pulse signal is always at a low level, it indicates that the filtrate at the water outlet of the filter press is in a water flow state, and the water content of the material in the filter plate is high, so that the material needs to be fed continuously; if the high and low levels of the pulse signal alternately appear, which indicates that the filtrate at the water outlet of the filter press is in a water droplet form at present, the interval duration of the water droplets can be determined according to the time interval of the high and low levels, and the current filter press is determined to be finished in response to the water flow rate being lower than the preset threshold value, that is, if the interval duration exceeds the preset duration threshold value, and a control instruction is sent.
As another example, when the voltage signal received by the control module is in the form of a pulse signal, the current water flow condition at the water outlet of the filter press can be directly determined according to the high-low level state in the pulse signal, and then when the water flow is lower than the preset threshold, a control instruction is issued to control the end of the feeding of the filter press.
In some embodiments of the present application, an intelligent monitoring device 910 for water flow for coal washing includes:
the double-electrode module is arranged at a preset position of the water outlet of the filter press, so that filtrate of the filter press flows through the double-electrode module, and the double-electrode module is in a conducting state;
the monitoring processing module is connected with the double-electrode module and is used for acquiring a voltage signal of the double-electrode module in real time and sending the voltage signal to a control module in a feeding control system of the filter press; wherein the voltage signal is used for indicating a control module of the filter press feeding control system to determine the water flow at the water outlet of the filter press.
In some embodiments of the present application, the monitoring processing module comprises:
the voltage division circuit unit is used for being connected with the double-electrode module to form a voltage division circuit;
and the signal acquisition unit is used for acquiring voltage signals of the double-electrode module in the voltage division circuit in real time and sending the acquired voltage signals to a control module of the filter press feeding control system.
In some embodiments of the present application, the monitoring processing module further comprises:
the signal conversion unit is connected with the signal acquisition unit and is used for converting the acquired voltage signal into a pulse signal and sending the pulse signal to a control module of the filter press feeding control system;
the signal acquisition unit is used for acquiring voltage signals of the double-electrode module in the voltage division circuit in real time and transmitting the acquired voltage signals to the signal conversion unit.
Further, in some embodiments of the present application, the monitoring processing module further comprises:
the filtering unit is connected with the signal acquisition unit and is used for filtering the acquired voltage signal;
the attenuation unit is connected with the filtering unit and used for carrying out attenuation processing on the filtered voltage signal according to the port requirement of the signal conversion unit and sending the processed voltage signal to the signal conversion unit;
the signal acquisition unit is used for acquiring voltage signals of the double-electrode module in the voltage division circuit in real time and sending the acquired voltage signals to the filtering unit.
As an implementation, the filtering unit includes:
the filter comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor and an operational amplifier, wherein one end of the first resistor is connected with the input end of a voltage signal, and the output end of the operational amplifier is the output end of a filter unit; wherein
The other end of the first resistor is connected with the first end of the second resistor, and the second end of the second resistor is connected with the positive input end of the operational amplifier;
one end of the first capacitor is connected with the first end of the second resistor, and the other end of the first capacitor is connected with the output end of the operational amplifier;
one end of the second capacitor is connected with the positive input end of the operational amplifier, and the other end of the second capacitor is grounded;
the first end of the third resistor is connected with the output end of the operational amplifier, the second end of the third resistor is respectively connected with the inverting input end of the operational amplifier and one end of the fourth resistor, and the other end of the fourth resistor is grounded.
As an implementation, the attenuation unit comprises:
a first resistor and a second resistor, wherein
The first end of the first resistor is connected with the output end of the filtering unit, and the second end of the first resistor is used as the output end of the attenuation unit;
one end of the second resistor is connected with the second end of the first resistor, and the other end of the second resistor is grounded.
In some embodiments of the present application, the monitoring processing module further comprises:
the signal following unit is connected with the attenuation unit and used for buffering the voltage signal and sending the processed voltage signal to the signal conversion unit;
and the attenuation unit is connected with the filtering unit and used for attenuating the filtered voltage signal according to the port requirement of the signal conversion unit and sending the processed voltage signal to the signal buffering unit.
In some embodiments of the present application, the two-electrode module comprises a two-electrode; the double electrode is two metal probes.
The specific functional structure of the intelligent water flow monitoring device for coal washing in the above embodiment has been described in detail in the embodiment of the device, and will not be described in detail here.
According to the pressure filter feeding control system of this application embodiment, the voltage signal that the adoption is used for the intelligent monitoring devices of rivers of coal washing to gather the bipolar electrode module, because when the bipolar electrode module was flowed through to filtrating, the bipolar electrode module is in the on-state, so the voltage signal that control module received can be used for instructing the rivers condition of pressure filter delivery port, that is to say, control module can confirm whether the pressure filter feeding finishes according to received voltage signal, thereby the automated control of pressure filter feeding has been realized, not only can avoid the artifical mode to judge the subjective influence that the feeding ended, also can improve the filter-pressing effect effectively, guarantee the quality of product after the filter-pressing.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. An intelligent monitoring device for water flow for coal washing, comprising:
the double-electrode module is arranged at a preset position of a water outlet of the filter press, so that filtrate of the filter press flows through the double-electrode module, and the double-electrode module is in a conducting state;
the monitoring processing module is connected with the double-electrode module and is used for acquiring a voltage signal of the double-electrode module in real time and sending the voltage signal to a filter press feeding control system; wherein the voltage signal is used for instructing the filter press feeding control system to determine the water flow of the filter press water outlet.
2. The apparatus of claim 1, wherein the monitoring processing module comprises:
the voltage division circuit unit is used for being connected with the double-electrode module to form a voltage division circuit;
and the signal acquisition unit is used for acquiring voltage signals of the double-electrode module in the voltage division circuit in real time and sending the acquired voltage signals to the filter press feeding control system.
3. The apparatus of claim 2, wherein the monitoring processing module further comprises:
the signal conversion unit is connected with the signal acquisition unit and is used for converting the acquired voltage signal into a pulse signal and sending the pulse signal to the filter press feeding control system;
the signal acquisition unit is used for acquiring voltage signals of the double-electrode module in the voltage division circuit in real time and transmitting the acquired voltage signals to the signal conversion unit.
4. The apparatus of claim 3, wherein the monitoring processing module further comprises:
the filtering unit is connected with the signal acquisition unit and is used for filtering the acquired voltage signal;
the attenuation unit is connected with the filtering unit and used for carrying out attenuation processing on the filtered voltage signal according to the port requirement of the signal conversion unit and sending the processed voltage signal to the signal conversion unit;
the signal acquisition unit is used for acquiring voltage signals of the double-electrode module in the voltage division circuit in real time and sending the acquired voltage signals to the filtering unit.
5. The apparatus of claim 4, wherein the filtering unit comprises:
the filter circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor and an operational amplifier, wherein one end of the first resistor is connected with the input end of the voltage signal, and the output end of the operational amplifier is the output end of the filter unit; wherein
The other end of the first resistor is connected with the first end of the second resistor, and the second end of the second resistor is connected with the positive input end of the operational amplifier;
one end of the first capacitor is connected with the first end of the second resistor, and the other end of the first capacitor is connected with the output end of the operational amplifier;
one end of the second capacitor is connected with the positive input end of the operational amplifier, and the other end of the second capacitor is grounded;
the first end of the third resistor is connected with the output end of the operational amplifier, the second end of the third resistor is respectively connected with the inverting input end of the operational amplifier and one end of the fourth resistor, and the other end of the fourth resistor is grounded.
6. The apparatus of claim 4, wherein the attenuation unit comprises:
a first resistor and a second resistor, wherein
The first end of the first resistor is connected with the output end of the filtering unit, and the second end of the first resistor is used as the output end of the attenuation unit;
one end of the second resistor is connected with the second end of the first resistor, and the other end of the second resistor is grounded.
7. The apparatus of claim 4, wherein the monitoring processing module further comprises:
the signal following unit is connected with the attenuation unit and is used for buffering the voltage signal and sending the processed voltage signal to the signal conversion unit;
the attenuation unit is connected with the filtering unit and used for carrying out attenuation processing on the filtered voltage signal according to the port requirement of the signal conversion unit and sending the processed voltage signal to the signal buffering unit.
8. The apparatus of claim 1, wherein the dual electrode module comprises a dual electrode; the double electrode is two metal probes.
9. A filter press feed control system, comprising:
the intelligent monitoring device for the water flow for coal washing of any one of claims 1 to 8;
and the control module is connected with the intelligent water flow monitoring device and used for receiving the voltage signal sent by the intelligent water flow monitoring device and controlling the feeding of the filter press according to the voltage signal.
10. The system of claim 9, wherein the control module is specifically configured to:
receiving the voltage signal, and determining the water flow of the water outlet of the filter press according to the voltage signal;
in response to the water flow rate being below a preset threshold, ending the feeding of the filter press.
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