CN114602216B - Automatic monitoring system for red mud settling tank - Google Patents
Automatic monitoring system for red mud settling tank Download PDFInfo
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- CN114602216B CN114602216B CN202210225890.0A CN202210225890A CN114602216B CN 114602216 B CN114602216 B CN 114602216B CN 202210225890 A CN202210225890 A CN 202210225890A CN 114602216 B CN114602216 B CN 114602216B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
Abstract
The invention provides an automatic monitoring system of a red mud settling tank, which comprises the following components: a thickener settling tank and a main control device; the settling tank of the thickener is provided with a conical tank body, the top of the conical tank body is provided with a feeding cylinder feeding device, and the bottom of the conical tank body is provided with an underflow conveying device and a clear liquid overflow device; the slurry is settled under the action of gravity, the liquid flows upwards under the action of the pressure of the self weight of the slurry, and clear overflow is formed and discharged by a clear liquid overflow device; the detection module is used for collecting the operation information of the thickener sedimentation tank and the system operation information; the DCS control display module is connected with the detection module, acquires the operation information of the thickener sedimentation tank and the system operation information, and displays the operation information for monitoring personnel to check. And through the frequency difference and frequency shift principle of sonar echo, the measurement of the interface of the supernatant layer, the sedimentation layer and the mud layer of the sedimentation tank is realized, and the measurement result is displayed on line in real time. The process monitoring, control and management are all centralized, automatic and networked.
Description
Technical Field
The invention relates to the technical field of alumina production, in particular to an automatic monitoring system for a red mud settling tank.
Background
In the process of producing alumina by the Bayer process, bauxite is dissolved at high temperature and high pressure to obtain red mud slurry containing red mud and sodium aluminate solution. Separating the red mud from the sodium aluminate solution to obtain a solution meeting the requirement of seed crystal decomposition, performing next-step decomposition, washing the separated red mud to recover the attached aluminum oxide and sodium oxide, and then conveying the red mud to a filter pressing procedure for next-step treatment and stacking. Wherein, the separation of the red mud and the sodium aluminate solution is critical, and the quality of the liquid-solid separation effect not only seriously affects the productivity, but also affects the product quality. Currently, one of the major large-scale apparatuses for liquid-solid separation is a settling tank.
At present, an infrared method, an ultrasonic method and a radioactive method are mainly adopted for online measurement in the aspect of alumina settling tank mud layer detection. Whether infrared, ultrasonic or radiological is accomplished by transmitting and receiving sensors, the mud level is analyzed by analyzing the transmitted and received intensities. Because the detection probes are all arranged in the settling tank, scaling substances in the slurry are easy to adhere to the probes, and the analysis precision is reduced.
Therefore, each time the probe is lifted or lowered, hot water is required for automatic cleaning. Because the automatic cleaning requires higher system synchronism, the phenomena of broken probe cable, falling of the probe into a settling tank and the like often occur in the actual operation process, and the system is stopped. Meanwhile, the existing products can not detect the underflow density and the clear liquid density in principle, and can be completed by being matched with other instruments.
Disclosure of Invention
The invention provides an automatic monitoring system for a red mud settling tank, which accurately measures the height of a mud layer of the settling tank through computer detection and data analysis, can meet the actual requirements on site, and ensures that the settling process is more stable.
The system comprises: a thickener settling tank and a main control device; the settling tank of the thickener is provided with a conical tank body, the top of the conical tank body is provided with a feeding cylinder feeding device, and the bottom of the conical tank body is provided with an underflow conveying device and a clear liquid overflow device;
a concentrated deposition layer is arranged in the conical tank body; the feeding cylinder feeding device is communicated with the concentrated sediment layer;
mixing raw materials and a flocculating agent according to a certain proportion, entering a conical groove body through a feeding cylinder feeding device, and radially entering the upper part of a concentrated deposition layer by the mixed slurry;
the slurry is settled under the action of gravity, the liquid flows upwards under the action of the pressure of the self weight of the slurry, and clear overflow is formed and discharged by a clear liquid overflow device;
the master control device includes: the system comprises a detection module, a communication module and a DCS control display module;
the detection module is used for collecting the operation information of the thickener sedimentation tank and the system operation information;
the DCS control display module is connected with the detection module through the communication module to acquire the operation information of the thickener sedimentation tank and the system operation information, and displays the operation information for monitoring personnel to check.
Preferably, the D detection module includes: a frequency modulation sonar sensor;
the frequency modulation sonar sensor is attached to the wall of the tank to measure the liquid level of the clear liquid layer, the sedimentation layer and the mud layer of the sedimentation tank of the thickener.
Preferably, the D master device further comprises: a field liquid crystal screen;
the on-site liquid crystal screen is used for displaying three layers of data, namely the height of a clear liquid layer, the height of a sedimentation layer and the height of a mud layer.
Preferably, the DDCS control display module is also used for integrating the operation information of the thickener sedimentation tank and the system operation information in real time by combining the three-dimensional diagram of the alumina production process, and integrating the operation state of the thickener sedimentation tank, key production indexes of the thickener sedimentation tank and a scheduling scheme of the alumina production process to form a unified alumina production process monitoring mode.
Preferably, the DDCS control display module is further configured to monitor the flow rate of liquid driven by a motor and a pump station of the system, the liquid level of a settling tank of the thickener, and the composition and the sedimentation trend of the liquid in the settling tank of the thickener in real time, obtain data of each liquid level area, each concentration area and each compaction area, and dock the data of each liquid level area, each concentration area and each compaction area with a preset database, remotely monitor the running state of the settling tank of the thickener in real time in a graphical display manner, and configure a monitoring and early warning mechanism and a data dynamic optimization management mode.
Preferably, the D main control equipment is in communication connection with a maintenance mobile terminal;
the maintenance mobile terminal is configured to maintenance personnel;
maintenance staff obtains attribute information and state information of a thickener sedimentation tank and system equipment through a maintenance mobile terminal;
monitoring personnel make up maintenance and repair plans of the thickener sedimentation tank and system equipment according to the attribute information and the state information, and dispatch the maintenance plans to a maintenance mobile terminal through the main control equipment;
and the maintenance personnel records and uploads maintenance process data through the maintenance mobile terminal, and the main control equipment manages the maintenance process data.
Preferably, D further comprises: an alumina production process data processing subsystem;
the alumina production process data processing subsystem configures each on-site acquisition terminal, main control equipment and maintenance mobile terminal to an equipment layer;
processing data between the main control equipment and each acquisition terminal and between the main control equipment and the maintenance mobile terminal are configured to a data layer;
performing functional decomposition according to equipment required by the alumina production process and decomposing and configuring a system software architecture into an application layer;
the monitoring terminal remotely accesses the monitoring platform through network connection or a system local area network, so that automatic monitoring data and historical data of various red mud settling tanks are obtained and configured to a display layer;
the alumina production process data processing subsystem manages personnel logging in the access system through authority authentication, monitors the authority of the access personnel, and records the data processing process of the access personnel in real time.
Preferably, the DDCS control display module monitors the operation information of the thickener sedimentation tank and the system operation information, and once an abnormal event is found, a preset control process is automatically executed and an alarm is given.
Preferably, the DDCS control display module is further configured to provide a function of inquiring an operation state in real time for a monitoring person and an accessing person, obtain operation information and system operation information of the thickener settling tank in real time according to control instructions of the monitoring person and the accessing person, and generate a real-time dynamic data table and a real-time dynamic graph according to the collected operation information and system operation information of the thickener settling tank;
the operation information of the thickener sedimentation tank and the system operation information are inquired in a timing monitoring mode, all data are stored in a database, and historical data inquiry is carried out for monitoring staff;
and the operation information of the settling tank of the thickener and the operation information of the system are added, deleted and modified, and when the super threshold is modified, the system automatically restores to the prior normal state when being started next time.
Preferably, the DCS control display module is also used for grading according to the super-threshold states of different degrees when the operation information of the settling tank of the thickener and the system operation information are super-threshold, so as to form a multi-level super-threshold abnormal prompt; and grading according to the key degree of different equipment in the alumina production process, and reminding monitoring personnel according to time priority or frequency after grading the super-threshold state.
From the above technical scheme, the invention has the following advantages:
the invention can effectively reflect actual conditions based on detection precision and performance indexes of the mud layer interface detector, guide production operation, meet actual requirements on site, stabilize the running condition of a sedimentation system and has great popularization and application values in the alumina industry.
According to the invention, the frequency difference and the frequency shift principle of sonar echo are adopted, the energy loss of the steel wall is overcome through the frequency modulation sonar sensor attached to the tank wall, and the measurement of the interface of the clear liquid layer, the sedimentation layer and the mud layer of the sedimentation tank is realized by combining a frequency shift method according to the signal propagation attenuation of sonar signals in different media and the data analysis and judgment of the frequency difference.
The invention adopts a non-contact type detection, and the probe is arranged on the wall of the sedimentation tank, so that the easily-scaled matters in the slurry cannot be easily attached to the probe, and the reduction of analysis precision caused by the direct contact of the probe and the slurry is avoided.
And the maintenance personnel records and uploads maintenance process data through the maintenance mobile terminal, and the main control equipment manages the maintenance process data. The system can realize the real-time monitoring of dynamic data in the operation process of the settling tank of the thickener and the system equipment, and ensure that monitoring staff can master the operation state in time. Meanwhile, maintenance staff can use the maintenance mobile terminal to maintain and repair the thickener sedimentation tank and the system equipment, can take pictures and upload, and support the submitting of field maintenance abnormal information from the maintenance mobile terminal. And forming a closed-loop management flow from the establishment of a maintenance and repair plan to the completion of maintenance and repair tasks, the analysis of the subsequent maintenance and repair reasons and the summarization statistics of all maintenance and repair tasks. And the monitoring personnel can realize the efficient management of the alumina production process.
The manager can browse the image data of any camera and any alumina production process at any moment, and the monitoring image can be displayed and inquired on the monitoring platform. The aluminum oxide production process data is integrally integrated through the aluminum oxide production process data processing subsystem, so that the stability of aluminum oxide production operation is improved, and the reliability, usability and safety of system monitoring data are improved. And the monitoring personnel can query the historical data curve on any day or at any time. Therefore, the real-time monitoring of the operation information of the thickener sedimentation tank and the system operation information is finally realized.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an automatic monitoring system of a red mud settling tank;
fig. 2 is a schematic diagram of a master device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The units and algorithm steps of each example described in the embodiments disclosed in the automatic monitoring system for the red mud settling tank provided by the invention can be realized by electronic hardware, computer software or a combination of the two, and in order to clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of functions in the above description. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The block diagram shown in the attached drawings of the automatic monitoring system for the red mud settling tank is only a functional entity and does not necessarily correspond to a physically independent entity. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
As shown in fig. 1 and 2, the automatic monitoring system for the red mud settling tank provided by the invention comprises: a thickener sedimentation tank 1 and a main control device;
the thickener settling tank 1 is provided with a conical tank body, the top of the conical tank body is provided with a feeding cylinder feeding device, and the bottom of the conical tank body is provided with an underflow conveying device and a clear liquid overflow device; a concentrated deposition layer is arranged in the conical tank body; the feeding cylinder feeding device is communicated with the concentrated sediment layer; mixing raw materials and a flocculating agent according to a certain proportion, entering a conical groove body through a feeding cylinder feeding device, and radially entering the upper part of a concentrated deposition layer by the mixed slurry; the slurry is settled under the action of gravity, the liquid flows upwards under the action of the pressure of the self weight of the slurry, and clear overflow is formed and discharged by a clear liquid overflow device;
the master control device includes: the system comprises a detection module 2, a communication module 4 and a DCS control display module 3; the detection module 2 is used for collecting the operation information and the system operation information of the thickener sedimentation tank 1; the DCS control display module 3 is connected with the detection module 2 through the communication module 4 to acquire the operation information of the thickener sedimentation tank 1 and the system operation information, and displays the operation information for monitoring personnel to check.
As an embodiment of the present invention, the thickener settling tank 1 may include, according to actual needs: the device comprises a conical groove body, a feeding cylinder feeding device, a harrow machine and a speed reducer; the incoming materials of the underflow conveying and clear liquid overflow device and the flocculating agent are mixed according to a certain proportion and enter a feeding barrel under the action of gravity, and the mixed slurry directly enters the upper part of a concentrated sediment layer from a radial feeding barrel at the lower part. The slurry floc is settled rapidly under the action of gravity, and the liquid flows upwards under the action of the pressure of the slurry self weight to form clear overflow which is discharged from the overflow groove.
The detection module 2 is responsible for the emission/collection of signals, the special cable is responsible for the transmission of original signals, the DCS control display module 3 is responsible for the processing/optimization of the original signals, and the signals are converted into 3 paths of 4-20mA signals (the heights of a clear liquid layer, a mixed layer and a mud layer) and are provided for DCS for display.
In the present invention, the detection module 2 includes: a frequency modulation sonar sensor and a field liquid crystal screen; the frequency modulation sonar sensor is attached to the wall of the tank to measure the liquid level of the clear liquid layer, the sedimentation layer and the mud layer of the sedimentation tank 1 of the thickener.
The on-site liquid crystal screen is used for displaying three layers of data, namely the height of a clear liquid layer, the height of a sedimentation layer and the height of a mud layer.
According to the invention, the frequency difference and the frequency shift principle of sonar echo are adopted, the energy loss of the steel wall is overcome through the frequency modulation sonar sensor attached to the tank wall, and the measurement of the interface of the clear liquid layer, the sedimentation layer and the mud layer of the sedimentation tank is realized by combining a frequency shift method according to the signal propagation attenuation of sonar signals in different media and the data analysis and judgment of the frequency difference.
The invention adopts a non-contact type detection, and the probe is arranged on the wall of the sedimentation tank, so that the easily-scaled matters in the slurry cannot be easily attached to the probe, and the reduction of analysis precision caused by the direct contact of the probe and the slurry is avoided.
According to the invention, the sediment layer height of the sedimentation tank is accurately measured by utilizing the frequency difference and frequency shift principles of sonar echo through computer detection and data analysis, so that the actual requirements of the site can be met, and the running condition of the sedimentation system is stabilized. 220VAC is adopted for power supply; three paths of 4-20mA outputs are respectively the height of a clear liquid layer, the height of a sedimentation layer and the height of a mud layer;
measurement accuracy: the interval between flat bottom probes is 2.5cm, and the interval between deep cone probes is 5 cm;
host usage ambient temperature: -40 to +70 ℃;
the probe uses the environment temperature of minus 50 ℃ to +150 ℃;
furthermore, the DCS control display module 3 is also used for integrating the operation information of the thickener sedimentation tank 1 and the system operation information in real time by combining the three-dimensional diagram of the alumina production process, and integrating the operation state of the thickener sedimentation tank 1, key production indexes of the thickener sedimentation tank 1 and the scheduling scheme of the alumina production process to form a unified alumina production process monitoring mode. The method is convenient for monitoring personnel to grasp the information of the alumina production process in real time, dynamically and intuitively.
The DCS control display module 3 is also used for monitoring the flow rate of liquid driven by a motor and a pump station of the system, the liquid level of the thickener sedimentation tank 1, the components of the liquid in the thickener sedimentation tank 1 and the sedimentation trend in real time, obtaining data of each liquid level area, each concentration area and each compaction area, butting the data of each liquid level area, each concentration area and each compaction area with a preset database, carrying out real-time remote monitoring on the running state of the thickener sedimentation tank 1 in a graphical display mode, and configuring a monitoring and early warning mechanism and a data dynamic optimization management mode.
In order to effectively manage field devices and processes and ensure the stability of a system through maintenance, the main control equipment is in communication connection with a maintenance mobile terminal; the maintenance mobile terminal is configured to maintenance personnel; a maintenance serviceman acquires attribute information and state information of the thickener sedimentation tank 1 and system equipment through a maintenance mobile terminal; the monitoring personnel makes up maintenance and repair plans of the thickener sedimentation tank 1 and system equipment according to the attribute information and the state information, and distributes the maintenance plans to the maintenance mobile terminal through the main control equipment;
and the maintenance personnel records and uploads maintenance process data through the maintenance mobile terminal, and the main control equipment manages the maintenance process data.
Managing maintenance repair process data includes: maintenance repair point management, maintenance repair step management, maintenance repair plan tracking, maintenance repair process route tracking, maintenance repair data statistics, maintenance repair fault reporting and the like.
The system can realize the real-time monitoring of dynamic data in the operation process of the thickener sedimentation tank 1 and system equipment, and ensure that monitoring staff can master the operation state in time. Meanwhile, maintenance staff can use the maintenance mobile terminal to maintain and repair the thickener sedimentation tank 1 and the system equipment, can take pictures and upload, and support the submission of field maintenance abnormal information from the maintenance mobile terminal. And forming a closed-loop management flow from the establishment of a maintenance and repair plan to the completion of maintenance and repair tasks, the analysis of the subsequent maintenance and repair reasons and the summarization statistics of all maintenance and repair tasks. And the monitoring personnel can realize the efficient management of the alumina production process.
The system of the invention further comprises: an alumina production process data processing subsystem;
the alumina production process data processing subsystem configures each on-site acquisition terminal, main control equipment and maintenance mobile terminal to an equipment layer; processing data between the main control equipment and each acquisition terminal and between the main control equipment and the maintenance mobile terminal are configured to a data layer; performing functional decomposition according to equipment required by the alumina production process and decomposing and configuring a system software architecture into an application layer;
the monitoring terminal remotely accesses the monitoring platform through network connection or a system local area network, so that automatic monitoring data and historical data of various red mud settling tanks are obtained and configured to a display layer; the alumina production process data processing subsystem manages personnel logging in the access system through authority authentication, monitors the authority of the access personnel, and records the data processing process of the access personnel in real time.
The alumina production process data processing subsystem provides data display and inquiry for the accessor; image data of the alumina production process can also be acquired by a camera. The manager can browse the image data of any camera and any alumina production process at any moment, and the monitoring image can be displayed and inquired on the monitoring platform. The aluminum oxide production process data is integrally integrated through the aluminum oxide production process data processing subsystem, so that the stability of aluminum oxide production operation is improved, and the reliability, usability and safety of system monitoring data are improved.
Further, the DCS control display module 3 is further configured to provide a function of inquiring the operation status in real time for a monitoring person and an accessing person, and obtain the operation information and the system operation information of the thickener sedimentation tank 1 in real time according to the control instructions of the monitoring person and the accessing person, and generate a real-time dynamic data table and a real-time dynamic graph according to the collected operation information and the system operation information of the thickener sedimentation tank 1;
the operation information of the thickener sedimentation tank 1 and the system operation information are inquired in a timing monitoring mode, all data are stored in a database, and historical data inquiry is carried out for monitoring staff; the monitoring personnel can query the historical data curve on either day or on either time. Thereby finally realizing the real-time monitoring of the operation information of the thickener sedimentation tank 1 and the system operation information.
And the operation information of the thickener sedimentation tank 1 and the operation information of the system are added, deleted and modified, and when the modification exceeds the threshold value, the system automatically restores to the prior normal state when being started next time.
The DCS control display module 3 monitors the operation information of the thickener sedimentation tank 1 and the system operation information, and once an abnormal event is found, a preset control process is automatically executed and an alarm is given. The alarm mode comprises the following steps: and sending a short message alarm to a monitoring person, carrying out telephone alarm and on-site audible and visual alarm to the monitoring person, and reminding on-site staff.
The DCS control display module 3 is also used for grading according to the super-threshold states of different degrees when the operation information of the thickener sedimentation tank 1 and the system operation information are super-threshold, so as to form a multi-level super-threshold abnormal prompt; and grading according to the key degree of different equipment in the alumina production process, and reminding monitoring personnel according to time priority or frequency after grading the super-threshold state.
According to the invention, the measurement of the interface of the solution layer, the sedimentation layer and the mud layer of the sedimentation tank is realized by the frequency difference and the frequency shift principle of sonar echo, and the measurement result is displayed on line in real time. The process monitoring, control and management are all centralized, automatic and networked.
The invention can effectively reflect actual conditions based on detection precision and performance indexes of the mud layer interface detector, guide production operation, meet actual requirements on site, stabilize the running condition of a sedimentation system and has great popularization and application values in the alumina industry.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. An automatic monitoring system for a red mud settling tank, comprising: a thickener settling tank and a main control device;
the settling tank of the thickener is provided with a conical tank body, the top of the conical tank body is provided with a feeding cylinder feeding device, and the bottom of the conical tank body is provided with an underflow conveying device and a clear liquid overflow device;
a concentrated deposition layer is arranged in the conical tank body; the feeding cylinder feeding device is communicated with the concentrated sediment layer;
mixing raw materials and a flocculating agent according to a certain proportion, entering a conical groove body through a feeding cylinder feeding device, and radially entering the upper part of a concentrated deposition layer by the mixed slurry;
the slurry is settled under the action of gravity, the liquid flows upwards under the action of the pressure of the self weight of the slurry, and clear overflow is formed and discharged by a clear liquid overflow device;
the master control device includes: the system comprises a detection module, a communication module and a DCS control display module;
the detection module is used for collecting the operation information of the thickener sedimentation tank and the system operation information;
the DCS control display module is connected with the detection module through the communication module to acquire the operation information of the thickener sedimentation tank and the system operation information, and displays the operation information for monitoring personnel to check;
the detection module comprises: a frequency modulation sonar sensor;
the frequency modulation sonar sensor is attached to the wall of the tank to measure the liquid level of a clear liquid layer, a sedimentation layer and a mud layer of a sedimentation tank of the thickener;
the DCS control display module is also used for integrating the operation state of the thickener sedimentation tank, key production indexes of the thickener sedimentation tank and a scheduling scheme of an alumina production process by combining a three-dimensional image of the alumina production process to perform real-time monitoring data on the operation information of the thickener sedimentation tank and the system operation information, so as to form a unified alumina production process monitoring mode;
the DCS control display module is also used for monitoring the flow rate of liquid driven by a motor and a pump station of the system, the liquid level of a settling tank of the thickener, the components of the liquid in the settling tank of the thickener and the siltation trend in real time, obtaining data of each liquid level area, each concentration area and each compaction area, butting the data of each liquid level area, each concentration area and each compaction area with a preset database, carrying out real-time remote monitoring on each equipment of the system in a graphical display mode, and configuring a monitoring and early warning mechanism and a data dynamic optimization management mode;
the DCS control display module monitors the operation information of the thickener sedimentation tank and the system operation information, and automatically executes a preset control process and alarms once an abnormal event is found;
the DCS control display module is also used for providing a function of inquiring the running state in real time for monitoring personnel and visiting personnel, acquiring the running information of the thickener sedimentation tank and the system running information in real time according to the control instructions of the monitoring personnel and the visiting personnel, and generating a real-time dynamic data table and a real-time dynamic graph according to the acquired running information of the thickener sedimentation tank and the system running information;
the operation information of the thickener sedimentation tank and the system operation information are inquired in a timing monitoring mode, all data information is stored in a database, and historical data inquiry is carried out for monitoring staff;
the operation information of the settling tank of the thickener and the operation information of the system are added, deleted and modified, when the super threshold is modified, the system automatically restores to the prior normal state when being started next time;
the DCS control display module is also used for grading according to the super-threshold states of different degrees when the operation information of the thickener sedimentation tank and the system operation information are super-threshold, so as to form a multi-level super-threshold abnormal prompt; and grading according to the key degree of different equipment in the alumina production process, and reminding monitoring personnel according to time priority or frequency after grading the super-threshold state.
2. The automatic monitoring system for red mud settling tank according to claim 1, wherein,
the master control device further includes: a field liquid crystal screen;
the on-site liquid crystal screen is used for displaying three layers of data, namely the height of a clear liquid layer, the height of a sedimentation layer and the height of a mud layer.
3. The automatic monitoring system for red mud settling tank according to claim 1, wherein,
the main control equipment is in communication connection with a maintenance mobile terminal;
the maintenance mobile terminal is configured to maintenance personnel;
maintenance staff obtains attribute information and state information of a thickener sedimentation tank and system equipment through a maintenance mobile terminal;
monitoring personnel make up maintenance and repair plans of the thickener sedimentation tank and system equipment according to the attribute information and the state information, and dispatch the maintenance plans to a maintenance mobile terminal through the main control equipment;
and the maintenance personnel records and uploads maintenance process data through the maintenance mobile terminal, and the main control equipment manages the maintenance process data.
4. The automatic monitoring system for red mud settling tank according to claim 1, wherein,
further comprises: an alumina production process data processing subsystem;
the alumina production process data processing subsystem configures each on-site acquisition terminal, main control equipment and maintenance mobile terminal to an equipment layer;
processing data between the main control equipment and each acquisition terminal and between the main control equipment and the maintenance mobile terminal are configured to a data layer;
performing functional decomposition according to equipment required by the alumina production process and decomposing and configuring a system software architecture into an application layer;
the monitoring terminal remotely accesses the monitoring platform through network connection or a system local area network, so that automatic monitoring data and historical data of various red mud settling tanks are obtained and configured to a display layer;
the alumina production process data processing subsystem manages personnel logging in the access system through authority authentication, monitors the authority of the access personnel, and records the data processing process of the access personnel in real time.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1997043027A1 (en) * | 1996-05-16 | 1997-11-20 | Baker Hughes Incorporated | Method and apparatus for controlling thickeners, clarifiers and settling tanks |
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| US10113008B2 (en) * | 2015-09-22 | 2018-10-30 | Corn Products Development, Inc. | Starch settling recovery system |
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| WO1997043027A1 (en) * | 1996-05-16 | 1997-11-20 | Baker Hughes Incorporated | Method and apparatus for controlling thickeners, clarifiers and settling tanks |
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| CN114602216A (en) | 2022-06-10 |
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