CN115155119A - Automatic sludge discharge control system and method for mechanical acceleration clarification tank - Google Patents
Automatic sludge discharge control system and method for mechanical acceleration clarification tank Download PDFInfo
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- CN115155119A CN115155119A CN202210827270.4A CN202210827270A CN115155119A CN 115155119 A CN115155119 A CN 115155119A CN 202210827270 A CN202210827270 A CN 202210827270A CN 115155119 A CN115155119 A CN 115155119A
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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
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/245—Discharge mechanisms for the sediments
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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
- B01D21/30—Control equipment
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/04—Investigating sedimentation of particle suspensions
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to an automatic sludge discharge control system and method for a mechanical accelerated clarification tank, wherein a controller is used for controlling a sample water sampling unit to sample, acquiring the total liquid level of sample water and sending the total liquid level of the sample water to the controller; the visual analysis unit collects and analyzes a mud-water interface image after the sampled sample water is precipitated for a preset time, obtains a mud-water interface liquid level, and sends the mud-water interface liquid level to the controller; the controller calculates a settlement ratio result according to the total liquid level of the sample water and the liquid level of the muddy water interface, the distributed control system controls the automatic sludge discharge device to discharge sludge according to the settlement ratio calculation result, and corresponding sludge discharge time is executed according to the settlement ratio result. The automatic sludge discharge control method for the mechanical acceleration clarification tank can realize automatic detection of sedimentation ratio of the mechanical acceleration clarification tank, automatic cleaning of the detection device, automatic control of the sludge discharge device discharger and addition of redundant sludge in the tank according to a detection result, and automatic matching of sludge discharge time.
Description
Technical Field
The invention relates to the technical field of water quality monitoring and control systems of thermal power plants, in particular to an automatic sludge discharge control system and method for a mechanical acceleration clarification tank.
Background
The quality of steam and water in a thermodynamic system is one of important factors influencing the safe and economic operation of thermal equipment of a thermal power plant.
Raw water which is not subjected to purification treatment contains a plurality of impurities, and the water is a water vapor circulating system which is not allowed to be used for the thermal equipment, and can be subjected to appropriate purification treatment to reach the standard so as to ensure the stable operation of the thermal equipment.
Mechanical accelerated clarifiers are one of the most common raw water pretreatment devices. Coagulant, slaked lime and other chemical agents are added into the pool to react with raw water, and accumulated impurity particles are contacted and adsorbed with each other, so that the purposes of reducing calcium and magnesium ions of the raw water and quickly separating clear water are achieved. Through coagulation treatment, the removed impurities form sludge which is settled to the bottom of a clarification tank, and the supernatant is used as the treated water quality, so that indexes such as turbidity, alkalinity, hardness and the like are obviously reduced. The mechanical accelerating clarification tank needs to continuously add chemicals in the operation process, and the bottom of the clarification tank is provided with a mud scraper to discharge sludge in time and in a proper amount, so that the most effective coagulation clarification treatment effect is guaranteed.
At present, a power generation enterprise generally adopts a manual mode to adjust the operation condition of a coagulation clarification tank, detects the 5min settlement ratio of a first reaction and a second reaction of a mechanical accelerated clarification tank according to the operation experience of personnel of each operation team, starts manual sludge discharge when the index is higher, can continuously operate when the index is lower, has very low automation degree, and influences the quality of effluent water due to lag adjustment. Particularly, under the background of 'carbon peak reaching and carbon neutralization', the deep peak regulation operation of a thermal power plant has large unit load fluctuation, the water inflow and the medicine adding amount of a mechanical accelerated clarification tank also change along with the change of the water inflow and the medicine adding amount, the detection is carried out in a manual mode, the interval time is long, the continuous monitoring cannot be carried out, the detection of the sedimentation ratio is delayed, and the stability of the effluent quality is directly influenced.
In conclusion, in the prior art, automatic monitoring or on-line monitoring of the sedimentation ratio of the first reverse sedimentation and the second reverse sedimentation is not realized, proper time and sludge discharge amount of sludge discharge cannot be determined, the sedimentation ratio index is detected by manual sampling, hysteresis exists, the operation condition of the coagulation clarification tank cannot be adjusted in time, the operation effect of a machine-added tank is poor, the fluctuation of effluent is high, and the normal operation of the subsequent process flow is seriously influenced.
Disclosure of Invention
The invention provides an automatic sludge discharge control system of a mechanical accelerated clarification tank, which solves the problems of low automation degree in the sludge discharge process of the conventional mechanical accelerated clarification tank, unstable effluent quality caused by lagging detection results, and blind adjustment and blind discharge caused by automatic sludge discharge of each operating team according to experience.
In a first aspect, an embodiment of the present invention provides an automatic sludge discharge control system for a mechanical acceleration clarifier, including:
the sample water sampling unit is used for sampling from the mechanical acceleration clarification tank according to a sampling instruction sent by the controller, acquiring the total liquid level of the sample water and sending the total liquid level of the sample water to the controller;
the visual analysis unit is used for collecting and analyzing a mud-water interface image after the sampled sample water is precipitated for a preset time, acquiring a mud-water interface liquid level and sending the mud-water interface liquid level to the controller;
the controller is used for receiving a sedimentation ratio detection instruction sent by the distributed control system, sending a sampling instruction to the sample water sampling unit, receiving a total sample water liquid level sent by the sample water sampling unit and a muddy water interface liquid level sent by the visual analysis unit, obtaining a sample water sedimentation ratio result according to the total sample water liquid level and the sample water muddy water interface liquid level, and sending the sample water sedimentation ratio result to the distributed control system;
the distributed control system is used for sending a settlement ratio detection instruction to the controller, receiving a sample water settlement ratio result sent by the controller, determining whether automatic sludge discharge and automatic sludge discharge time are needed according to the sample water settlement ratio result, and sending a sludge discharge processing instruction to the automatic sludge discharge device according to the automatic sludge discharge time if the automatic sludge discharge is needed;
and the automatic sludge discharge device is used for receiving the sludge discharge processing instruction sent by the distributed control system and executing sludge discharge processing.
In a further embodiment, the distributed control system comprises a judging module, wherein the judging module is used for judging whether sludge is required to be discharged according to the sedimentation ratio detection result and a preset sludge discharge control logic, and if sludge is required to be discharged, determining automatic sludge discharge time corresponding to different sedimentation ratios according to the sample water sedimentation ratio result and preset conditions.
In a further embodiment, the sample water sampling unit comprises a sampling vessel and a remote level meter adapted to the sampling vessel and adapted to obtain a total level of sample water.
In a further embodiment, the mechanically accelerated clarifier automatic sludge discharge control system further comprises:
and the flushing unit comprises a flushing water atomization flushing device and a compressed air scrubbing device, and is respectively used for receiving the flushing instruction sent by the controller, and the flushing unit is used for performing atomization flushing and pulse scrubbing on the sampling container after sample water in the sampling container is emptied.
In a further embodiment, a plurality of sampling connecting pipelines are arranged between the mechanical accelerated clarification tank and the sample water sampling unit, and an electromagnetic valve is arranged on each sampling connecting pipeline.
In a further embodiment, the visual analysis unit comprises a camera device and an image recognition unit, wherein the camera device is arranged on one side of the sampling container and is used for acquiring a muddy water interface image comprising a muddy water interface and a slurry height;
and the image recognition unit is used for recognizing and analyzing the muddy water interface image to obtain the muddy water interface liquid level.
In a second aspect, the invention provides a full-automatic operation control method for a mechanical accelerated clarifier, which comprises the following steps:
the distributed control system sends a settlement ratio detection instruction to the controller, and the controller sends a sampling instruction to the sample water sampling unit;
the sample water sampling unit samples from the mechanical acceleration clarification tank according to a sampling instruction sent by the controller, acquires the total liquid level of the sample water, and sends the total liquid level of the sample water to the controller;
the visual analysis unit collects and analyzes a mud-water interface image after the sampled sample water is precipitated for a preset time, obtains a mud-water interface liquid level, and sends the mud-water interface liquid level to the controller;
the controller receives the total liquid level of the sample water sent by the sample water sampling unit and the muddy water interface liquid level sent by the visual analysis unit, obtains a sample water sedimentation ratio result according to the total liquid level of the sample water and the muddy water interface liquid level of the sample water, and sends the sample water sedimentation ratio result to the distributed control system;
the distributed control system receives the sample water sedimentation ratio result sent by the controller, determines whether automatic sludge discharge and automatic sludge discharge time are needed according to the sample water sedimentation ratio result, and sends a sludge discharge processing instruction to the automatic sludge discharge device according to the automatic sludge discharge time if the automatic sludge discharge is needed;
and the automatic sludge discharge device receives the sludge discharge processing instruction sent by the distributed control system and executes sludge discharge processing.
In a further implementation manner of the second aspect of the present invention, the step of receiving, by the distributed control system, a sample water sedimentation ratio result sent by the controller, determining whether automatic sludge discharge and automatic sludge discharge time are required according to the sample water sedimentation ratio result, and if automatic sludge discharge is required, sending a sludge discharge processing instruction to the automatic sludge discharge device according to the automatic sludge discharge time includes:
and the distributed control system judges whether sludge needs to be discharged or not according to the sedimentation ratio detection result and a preset sludge discharge control logic, and if sludge needs to be discharged, the distributed control system determines the automatic sludge discharge time according to the sample water sedimentation ratio result and a preset condition.
In another implementation manner of the second aspect of the present invention, the method for controlling automatic sludge discharge of the mechanical accelerated clarifier further comprises the steps of:
and according to the flushing instruction sent by the controller, after the sample water in the sampling container is emptied, carrying out atomization flushing and pulse scrubbing on the sampling container.
In a further implementation manner of the second aspect of the present invention, the step of acquiring and analyzing the image of the muddy water interface by the visual analysis unit to obtain the liquid level of the muddy water interface includes:
acquiring a mud-water interface image comprising a mud-water interface and the height of mud;
and identifying and analyzing the mud-water interface image to obtain the mud-water interface liquid level.
The invention provides an automatic sludge discharge control system and method for a mechanical acceleration clarification tank. The visual analysis unit obtains the muddy water interface liquid level according to the sample water, the controller calculates a settlement ratio result according to the total liquid level of the sample water and the muddy water interface liquid level, the distributed control system controls the automatic sludge discharging device to discharge the sludge according to the settlement ratio result, and the automatic sludge discharging execution time can be judged according to the detection result. The technical effects of automatic monitoring of key indexes of sludge in the mechanical accelerated clarification tank, automatic cleaning of the detection device, automatic control of sludge discharge of the sludge discharge device according to detection results and automatic matching of sludge discharge time are achieved, the purposes of full automation, field unmanned detection and unattended sludge discharge of the mechanical accelerated clarification tank are achieved, and the hidden danger of blind regulation and blind discharge of the mechanical added tank sludge is thoroughly eradicated.
Drawings
FIG. 1 is a schematic structural diagram of an automatic sludge discharge control system of a mechanical accelerated clarifier in an embodiment of the present invention;
FIG. 2 is a schematic structural view of a preferred embodiment of an automatic sludge discharge control system of a mechanically accelerated clarifier in an embodiment of the present invention;
fig. 3 is a schematic structural view of another preferred embodiment of an automatic sludge discharge control system of a mechanical acceleration clarifier in an embodiment of the present invention.
FIG. 4 is a flow chart of an automatic sludge discharge control method of a mechanical acceleration clarifier in the embodiment of the invention.
Reference numerals:
1-sample water sampling unit; 201-a camera device; 202-an image recognition unit; 3-a controller; 4-a distributed control system; 5, an automatic sludge discharge device; 601-a washing water atomization washing device; 602-a compressed air scrubbing device; 7-a mechanical accelerated clarification tank; 8/9-sampling connecting pipeline; 10/11/14/15/19/24/27-electromagnetic valve; 12-a communicating tube; 13-sampling connecting main pipe; 16-a sewage draining pipe; 17-a remote level meter; 18-a sampling vessel; 20-a drainage pipeline; 21-normally open the door; 22-an overflow level switch; 23-washing the pipeline by atomizing the washing water; 25-an atomizing spray head; 26-an air inlet duct; 28-a sludge discharge pipeline; 29/31-electrically operated valve; 30-a flushing water pipeline; 32-a mud scraper; 33-an overflow conduit; 34-a dredge pump.
Detailed Description
The embodiments of the present invention will be specifically explained with reference to the drawings, which are given for illustrative purposes only and are not to be construed as limiting the invention, and the drawings are included for reference and illustrative purposes only and are not to be construed as limiting the scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides an automatic sludge discharge control system for a mechanical accelerated clarifier, including:
the sample water sampling unit 1 is used for sampling from the mechanical accelerated clarification tank according to a sampling instruction sent by the controller 3, acquiring the total liquid level of the sample water, and sending the total liquid level of the sample water to the controller 3;
the visual analysis unit 2 is used for collecting and analyzing a muddy water interface image after the sampled sample water is precipitated for a preset time, acquiring a muddy water interface liquid level and sending the muddy water interface liquid level to the controller 3;
the controller 3 is used for receiving a settlement ratio detection instruction sent by the distributed control system 4, sending a sampling instruction to the sample water sampling unit 1, receiving a total sample water liquid level sent by the sample water sampling unit 1 and a muddy water interface liquid level sent by the visual analysis unit, obtaining a sample water settlement ratio result according to the total sample water liquid level and the sample water muddy water interface liquid level, and sending the sample water settlement ratio result to the distributed control system 4;
the distributed control system 4 is used for sending a settlement ratio detection instruction to the controller 3, receiving a sample water settlement ratio result sent by the controller 3, determining whether automatic sludge discharge and automatic sludge discharge time are required according to the sample water settlement ratio result, and sending a sludge discharge processing instruction to the automatic sludge discharge device 5 according to the automatic sludge discharge time if automatic sludge discharge is required;
and the automatic sludge discharge device 5 is used for receiving the sludge discharge processing instruction sent by the distributed control system 4 and executing sludge discharge processing.
The automatic sludge discharge control system according to the embodiment of the present invention will be described in detail with reference to a preferred embodiment.
As shown in fig. 2, in the present embodiment, the sample water sampling unit 1 is provided with a cylindrical or square transparent sampling vessel 18 and a remote fluid level gauge 17 fitted to the sampling vessel 18. Sampling container 18 links to each other with mechanical accelerated clarification tank 7 through the sample connecting tube, and the sample connecting tube is including a plurality of, and each sample connecting tube connects gradually each reaction chamber of mechanical accelerated clarification tank 7 and all is provided with the solenoid valve on every sample connecting tube, and each solenoid valve all is connected with controller 3. In the embodiment of the invention, the mechanical accelerated clarification tank is provided with 2 reaction chambers as an example, so the tank wall of the mechanical accelerated clarification tank is provided with a sampling connecting pipeline 8 and a sampling connecting pipeline 9, and the sampling connecting pipeline 8 and the sampling connecting pipeline 9 are sequentially provided with an electromagnetic valve 10 and an electromagnetic valve 11. The sampling connecting pipeline 8 and the sampling connecting pipeline 9 are connected with a sampling connecting main pipe 13 through a communicating pipe 12, the sampling connecting main pipe 13 is provided with an electromagnetic valve 14 and is connected with a sampling container 18, a sewage discharge pipe 16 is arranged at the joint of the communicating pipe 12 and one of the sampling connecting pipelines 9, and the electromagnetic valve 15 is arranged on the sewage discharge pipe. The electromagnetic valves 10/11/14/15 are all connected with the controller 3. The sampling pipeline corresponding to the number of the reaction chambers of the mechanical acceleration clarification tank can realize sampling of sample water of different reaction chambers. Set up the solenoid valve on the sample pipeline, controller 3 realizes the sample to different machinery acceleration clarification tank reaction chambers through the switch of controlling different solenoid valves.
An overflow pipeline 33 is arranged on the wall close to the top end of the sampling container 18, a long opening door 21 and an overflow liquid level switch 22 are arranged on the overflow pipeline 33 and used for controlling the liquid level of the sample water, and the overflow liquid level switch 22 is connected with the controller 3. The bottom of the sampling container 18 is provided with a drainage pipeline 20, the drainage pipeline is provided with an electromagnetic valve 19, and the electromagnetic valve 19 is connected with the controller 3. The overflow pipe 33 is connected to the drain pipe 20, and water can be discharged through the drain pipe 20 while flowing out of the overflow pipe 33. The overflow pipe 33 can not only prevent the sample water from overflowing, but also ensure that the volume of the sample water is the same each time the sample water is sampled, and ensure the accuracy of the settlement ratio measurement.
After the controller 3 receives a settlement ratio detection instruction sent by the distributed control system 4, a signal is sent to open the electromagnetic valve 15 and the electromagnetic valve 10 or 11, a sampling pipeline is flushed and drained, the electromagnetic valve 14 is opened after a certain time, the electromagnetic valve 15 is closed, sample water is injected into the sampling container 18, when the sample water passes through the long opening door 21, the overflow liquid level switch 22 is triggered to send the signal to the controller 3, after the controller 3 receives the signal sent by the overflow liquid level switch 22, a control signal is sent to close the electromagnetic valve 14 and the electromagnetic valve 10 or 11, and the sampling process is completed.
In addition to the sampling method described in the embodiments of the present application, the sampling method may also be a method of sampling water by using a sampling pump, and the present invention is not limited thereto.
The visual analysis unit 2 includes an imaging device 201 and an image recognition unit 202, and the imaging device 201 is disposed on the sampling container 18 side and is used for acquiring a mud-water interface image including a mud-water interface and a mud height. In order to obtain a clearer mud-water interface image, the image capturing device 201 of the present embodiment employs a high-definition image capturing device. And the image identification unit 202 is used for identifying and analyzing the muddy water interface image to obtain the liquid level of the muddy water interface. The image recognition unit 202 of the present embodiment may be algorithm recognition software provided in a computer, or a dedicated image recognition device, or an image recognition module embedded in a high-definition camera.
The sample water is settled after a specific time, and then the result of the settlement ratio is detected, in this embodiment, the result of the settlement ratio is analyzed in 5min, so the settling time of the sample water is 5min. After sample water is settled for 5min, an interface is generated between clear water and sludge, and the high-definition camera 201 collects images of the muddy water interface including the muddy water interface and the mud height and transmits the images to the image recognition unit 202. The image recognition unit 202 performs recognition analysis on the muddy water interface image, obtains the liquid level of the muddy water interface, and sends the muddy water interface image and the corresponding muddy water interface liquid level to the controller 3.
The controller 3 receives the total liquid level of the sample water sent by the remote liquid level meter 17 and the liquid level of the sample water-mud interface sent by the visual analysis unit 2, and calculates the result of the sample water sedimentation ratio according to the total liquid level of the sample water and the liquid level of the mud-water interface, wherein the specific calculation formula is as follows:
SV＝(h/H)*100％，
wherein SV is the sedimentation ratio of the sample water, H is the liquid level of the mud-water interface, and H is the total liquid level of the sample water.
The controller 3 sends the sample water sedimentation ratio result to the distributed control system 4, the distributed control system 4 of the embodiment comprises a judgment module, the judgment module is preset with a sludge discharge execution threshold value and sludge discharge time corresponding to different sedimentation ratio result intervals and used for judging whether sludge discharge is needed or not according to the sedimentation ratio detection result and preset sludge discharge control logic, and if sludge discharge is needed, automatic sludge discharge time corresponding to different sedimentation ratios is determined according to the sample water sedimentation ratio result and preset conditions.
In this embodiment, taking a 5min sample water sedimentation ratio as an example, setting a sludge discharge execution threshold value to be 5%, and giving sludge discharge times corresponding to result intervals of different sedimentation ratios as:
5% -7% of the corresponding sludge discharge time is 100s;
7-10% of the sludge discharge time is 150s;
10-14% of the corresponding sludge discharge time is 200s;
14% -17% of the corresponding sludge discharge time is 250s;
more than 17% corresponds to a sludge discharge time of 300s.
And when the sample water sedimentation ratio reaches a preset sludge discharge execution threshold, judging that sludge discharge treatment needs to be executed, and determining sludge discharge time according to the interval of the sedimentation ratio.
If the result of the sedimentation ratio of the sample water is 9%, firstly judging that the result of the sedimentation ratio is more than 5%, needing to execute sludge discharge action, then judging that the result of the sedimentation ratio is between 7% and 10%, and executing sludge discharge for 150s.
Different production processes have different requirements on water quality, the judgment modules of the distributed control system 4 have different preset sludge discharge execution thresholds, and the sludge discharge execution time is different. The sludge discharge time is also related to the sludge discharge capacity of the automatic sludge discharge device 5, the deposition amount of the sludge at the bottom of the mechanical accelerated clarification tank can be estimated according to the sample water sedimentation ratio result, and the maximum residual sludge amount after the completion of the automatic sludge discharge sequence control can be set according to different production processes according to the requirements. And calculating to obtain corresponding sludge discharge time according to the deposition amount of the sludge at the bottom of the mechanical accelerated clarification tank, the maximum residual sludge amount after the automatic sludge discharge sequence control is finished and the sludge discharge capacity of the automatic sludge discharge device 5.
And determining the calculated mud discharging time result through field debugging and experimental verification, importing finally determined mud discharging time data corresponding to different sample water sedimentation ratio intervals into the distributed control system 4, automatically matching the corresponding mud discharging time by the distributed control system 4 according to the calculated result of the sample water sedimentation ratio, and controlling the automatic mud discharging device 5 to execute the corresponding mud discharging time.
Automatic mud discharging device 5 is located mechanical acceleration depositing reservoir 7 bottom, including mud scraper 32 and row mud pipeline 28, mud scraper 32 sets up inside mechanical acceleration depositing reservoir 7, and mud scraper 32 is connected with distributed control system 4, and mud scraper 32 passes through mechanical motion, realizes the continuous mud scraping operation of mechanical acceleration depositing reservoir 7 inner wall, and row mud pipeline 28 is connected bottom mechanical acceleration depositing reservoir 7. The invention can adopt static pressure sludge discharge or the power of a sludge discharge pump to convey the sludge, for the static pressure sludge discharge, an electric valve 29 is arranged on a sludge discharge pipeline 28, the electric valve 29 is connected with the distributed control system 4, and the opening and closing of the electric valve 29 are controlled by the distributed control system 4, so that the static pressure sludge discharge of the mechanical accelerated clarification tank 7 is realized.
Meanwhile, the sludge discharge pipeline 28 is connected with a washing water pipeline 30, an electric valve 31 is arranged on the washing water pipeline 30, and the electric valve 31 is connected with the distributed control system 4.
And when the distributed control system 4 judges that sludge discharge is required according to the received sample water sedimentation ratio result, controlling the automatic sludge discharge device 5 to execute automatic sludge discharge treatment. An electric valve 29 arranged on a static pressure sludge discharge pipeline 28 of the mechanical accelerated clarification tank 7 is opened to discharge the sludge to the thickening tank. After the preset sludge discharge time is executed, the electric valve 31 is opened, the electric valve 29 is closed, the pipeline is flushed after the sludge discharge is executed, the sludge stored in the pipeline is flushed to the concentration tank, no sludge is deposited in the pipeline, and the sludge discharge treatment is finished.
In the embodiment shown in fig. 3, the sludge pump is powered to deliver the sludge, and the other end of the sludge discharge pipe 28 is connected to the sludge pump 34. When the distributed control system 4 judges that sludge discharge is required, the electric valve 29 and the sludge discharge pump 34 arranged on the sludge discharge pipeline 28 of the mechanical acceleration clarifier 7 are opened, and sludge is discharged through the sludge discharge pump 34. After the preset sludge discharge time is executed, the electric valve 31 is opened, the electric valve 29 is closed, the sludge discharge pipeline 28 and the sludge discharge pump 34 are flushed after sludge discharge is executed, sludge accumulated in the sludge discharge pipeline 28 and the sludge discharge pump 34 is flushed and discharged, the sludge discharge pump 34 and the electric valve 31 are closed after the specific time is executed, and sludge discharge treatment is finished.
The distributed control system 4 sends a sedimentation ratio detection instruction to the controller 3 at regular time, performs sequential control of sample water sedimentation ratio detection, and can realize regular online monitoring of the sedimentation ratio of the mechanical accelerated clarification tank.
For guaranteeing the accuracy of sample water settlement ratio testing result, need to wash settlement ratio detection device after the settlement ratio detects the completion, the automatic row of mud control system of mechanical acceleration clarification tank of this embodiment still includes:
and the flushing unit 6 comprises a flushing water atomization flushing device 601 and a compressed air scrubbing device 602, which are respectively used for receiving the flushing instruction sent by the controller 3, and performing atomization flushing and pulse scrubbing on the sampling container after sample water in the sampling container is emptied.
The washing water atomization washing device 601 is arranged at the top end of the sampling container 18 in a suspension mode and comprises a washing water atomization washing pipeline 23, an electromagnetic valve 24 and an atomization nozzle 25 are arranged on the washing water atomization washing pipeline 23, and the electromagnetic valve 24 is connected with the controller 3. The compressed air scrubbing device 602 is arranged at the bottom of the sampling container and comprises an air inlet pipe 26, a solenoid valve 27 is arranged on the air inlet pipe 26, and the solenoid valve 27 is connected with the controller 3.
In the embodiment of the invention, after the calculation of the sedimentation ratio of the sample water is finished, the electromagnetic valve 19 is opened, the sampling container is emptied, then the electromagnetic valve 24 is opened, the inner wall of the sampling container is cleaned by using the water mist spray head 25, after a certain time, the electromagnetic valve 19 is closed, the air inlet valve 27 is opened, pulse scrubbing is carried out, after the liquid level switch 22 is operated, the air inlet valve 27 and the electromagnetic valve 24 are closed, the electromagnetic valve 19 is opened, after the flushing water is emptied, the flushing water is closed, the washing of the sedimentation ratio detection device is finished, the influence on the accuracy of the next sampling detection is avoided, and the next sampling process is carried out after the flushing is finished.
The sampling container is clean and is the key for guaranteeing the accuracy of the detection result of the sample water sedimentation ratio, and because the sample water contains a large amount of sludge, the wall of the sampling container needs to be guaranteed to be cleaned in place during cleaning, and no sludge is left. The invention adopts a mode of combining atomization washing and pulse scrubbing, firstly utilizes the atomization nozzle to wash the inner wall of the sampling container from top to bottom in a large range, then utilizes the gas inlet pipeline arranged at the bottom to input high-pressure gas into the sampling container to form airflow for pulse scrubbing, and can clean stubborn dirt at the bottom and on the inner wall of the sampling container. The two cleaning methods are combined, so that the interior of the container can be kept clean all the time after sampling every time, and the accuracy of next sampling detection is not influenced.
In the embodiment of the invention, the control of the sample water sampling unit 1 and the visual analysis unit 2 and the calculation of the sedimentation ratio result are both carried out by the controller, so that the control of the sample water sampling unit 1 and the visual analysis unit 2 and the acquisition of the muddy water interface image, the muddy water decomposition surface liquid level and the sample water total liquid level information are realized. The distributed control system 4 is used for carrying out remote control and centralized operation on the controller 3 and the automatic sludge discharge device 5, and the requirements of flexible, reliable and accurate control on the automatic sludge discharge process of the mechanical accelerated clarification tank are met.
Based on the above automatic sludge discharge control system for the mechanical accelerated clarifier, an embodiment of the present invention further provides an automatic sludge discharge control method for a mechanical accelerated clarifier, referring to fig. 4, the method includes the steps of:
s10, the distributed control system sends a settlement ratio detection instruction to a controller, and the controller sends a sampling instruction to a sample water sampling unit;
s20, sampling from the mechanical acceleration clarification tank by the sample water sampling unit according to a sampling instruction sent by the controller, acquiring the total liquid level of the sample water, and sending the total liquid level of the sample water to the controller;
s30, collecting and analyzing a mud-water interface image by a visual analysis unit after the sampled sample water is precipitated for a preset time, acquiring a mud-water interface liquid level, and sending the mud-water interface liquid level to a controller;
s40, the controller receives the total sample water liquid level sent by the sample water sampling unit and the muddy water interface liquid level sent by the visual analysis unit, obtains a sample water sedimentation ratio result according to the total sample water liquid level and the sample water muddy water interface liquid level, and sends the sample water sedimentation ratio result to the distributed control system;
s50, the distributed control system receives a sample water sedimentation ratio result sent by the controller, determines whether automatic sludge discharge and automatic sludge discharge time are needed according to the sample water sedimentation ratio result, and sends a sludge discharge processing instruction to an automatic sludge discharge device according to the automatic sludge discharge time if the automatic sludge discharge is needed;
and S60, the automatic sludge discharge device receives a sludge discharge processing instruction sent by the distributed control system and executes sludge discharge processing.
In a further embodiment of the present method for controlling automatic sludge discharge in a mechanically accelerated clarifier, the method further comprises the steps of:
and according to the flushing instruction sent by the controller, after the sample water in the sampling container is emptied, carrying out atomization flushing and pulse scrubbing on the sampling container.
In the further embodiment of this application mechanical acceleration clarifier automatic mud discharging control method, the visual analysis unit gathers and analyzes the muddy water interface image, and the step of acquireing muddy water interface liquid level includes:
acquiring a mud-water interface image comprising a mud-water interface and the height of mud;
and identifying and analyzing the mud-water interface image to obtain the mud-water interface liquid level.
For specific limitations of an automatic sludge discharge control method of a mechanical acceleration clarifier, reference may be made to the above limitations of an automatic sludge discharge control system of a mechanical acceleration clarifier, and details thereof are not repeated here. Those of ordinary skill in the art will appreciate that the various modules and steps described in connection with the embodiments disclosed herein may be implemented as hardware, software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 application.
The embodiment of the invention provides an automatic sludge discharge control system and method for a mechanical accelerated clarification tank, which aim at the problems of low automation degree, unstable effluent quality and poor operation effect of the sludge discharge mode of the conventional mechanical accelerated clarification tank and blind adjustment and blind discharge caused by automatic sludge discharge of each operating team according to experience. In the embodiment, the controller is adopted to realize the local control of sample water sampling, data acquisition, image acquisition and analysis and sample water sedimentation ratio result calculation, and the distributed control system is used for realizing the control of the sludge discharge device and the sludge discharge time according to the sample water sedimentation ratio result and a built-in program, so that the problems of blind adjustment and blind discharge are avoided. Compare in current row's mud mode, this embodiment can not only realize automatic row's mud, reduces the manpower, and through carrying out accurate management and control to row's mud time, stop workman's blind regulation, blind emission moreover, has promoted the mechanical stability of accelerating clarification tank water quality of water.
The above-mentioned embodiments only express some preferred embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present application. Therefore, the protection scope of the present patent shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an automatic row's mud control system of mechanical acceleration depositing reservoir which characterized in that includes:
the sample water sampling unit is used for sampling from the mechanical acceleration clarification tank according to a sampling instruction sent by the controller, acquiring the total liquid level of the sample water and sending the total liquid level of the sample water to the controller;
the visual analysis unit is used for collecting and analyzing a muddy water interface image after the sampled sample water is precipitated for a preset time, acquiring a muddy water interface liquid level and sending the muddy water interface liquid level to the controller;
the controller is used for receiving a sedimentation ratio detection instruction sent by the distributed control system, sending a sampling instruction to the sample water sampling unit, receiving a total sample water liquid level sent by the sample water sampling unit and a muddy water interface liquid level sent by the visual analysis unit, obtaining a sample water sedimentation ratio result according to the total sample water liquid level and the sample water muddy water interface liquid level, and sending the sample water sedimentation ratio result to the distributed control system;
the distributed control system is used for sending a settlement ratio detection instruction to the controller, receiving a sample water settlement ratio result sent by the controller, determining whether automatic sludge discharge and automatic sludge discharge time are required according to the sample water settlement ratio result, and sending a sludge discharge processing instruction to the automatic sludge discharge device according to the automatic sludge discharge time if automatic sludge discharge is required;
and the automatic sludge discharge device is used for receiving the sludge discharge processing instruction sent by the distributed control system and executing sludge discharge processing.
2. The automatic sludge discharge control system of the mechanical accelerating clarifier, which is characterized in that the distributed control system comprises a judgment module, the judgment module is used for judging whether sludge discharge is needed or not according to the detection result of the sedimentation ratio and the preset sludge discharge control logic, if sludge discharge is needed, the automatic sludge discharge time corresponding to different sedimentation ratios is determined according to the result of the sample water sedimentation ratio and the preset conditions.
3. The automatic sludge discharge control system of a mechanical accelerated clarifier according to claim 1, wherein the sample water sampling unit comprises a sampling container and a remote transmission liquid level meter adapted with the sampling container and used for obtaining the total liquid level of the sample water.
4. The automatic sludge discharge control system for a mechanically accelerated clarifier according to claim 3, wherein the system further comprises:
and the flushing unit comprises a flushing water atomization flushing device and a compressed air scrubbing device, and is respectively used for receiving the flushing instruction sent by the controller, and the sampling container is subjected to atomization flushing and pulse scrubbing after sample water in the sampling container is emptied.
5. The automatic sludge discharge control system of the mechanical accelerated clarifier according to claim 3, wherein a plurality of sampling connection pipes are provided between the mechanical accelerated clarifier and the sample water sampling unit, and an electromagnetic valve is provided on each sampling connection pipe.
6. The automatic sludge discharge control system of the mechanical accelerated clarifier according to claim 3, wherein the visual analysis unit comprises a camera device and an image recognition unit, the camera device is arranged at one side of the sampling container and is used for acquiring a mud-water interface image comprising a mud-water interface and a mud height;
and the image identification unit is used for identifying and analyzing the muddy water interface image to obtain the muddy water interface liquid level.
7. The automatic sludge discharge control method of the mechanical acceleration clarification tank is characterized by comprising the following steps:
the distributed control system sends a settlement ratio detection instruction to the controller, and the controller sends a sampling instruction to the sample water sampling unit;
the sample water sampling unit samples from the mechanical acceleration clarification tank according to a sampling instruction sent by the controller, acquires the total liquid level of the sample water, and sends the total liquid level of the sample water to the controller;
the visual analysis unit collects and analyzes a mud-water interface image after the sampled sample water is precipitated for a preset time, obtains a mud-water interface liquid level, and sends the mud-water interface liquid level to the controller;
the controller receives the total liquid level of the sample water sent by the sample water sampling unit and the muddy water interface liquid level sent by the visual analysis unit, obtains a sample water sedimentation ratio result according to the total liquid level of the sample water and the muddy water interface liquid level of the sample water, and sends the sample water sedimentation ratio result to the distributed control system;
the distributed control system receives the sample water sedimentation ratio result sent by the controller, determines whether automatic sludge discharge and automatic sludge discharge time are needed according to the sample water sedimentation ratio result, and sends a sludge discharge processing instruction to the automatic sludge discharge device according to the automatic sludge discharge time if the automatic sludge discharge is needed;
and the automatic sludge discharge device receives the sludge discharge processing instruction sent by the distributed control system and executes sludge discharge processing.
8. The method as claimed in claim 7, wherein the step of receiving the sample water sedimentation ratio result from the controller, determining whether automatic sludge discharge and automatic sludge discharge time are required according to the sample water sedimentation ratio result, and sending a sludge discharge processing command to the automatic sludge discharge device according to the automatic sludge discharge time if automatic sludge discharge is required comprises:
and the distributed control system judges whether sludge is required to be discharged according to the sedimentation ratio detection result and a preset sludge discharge control logic, and if sludge is required to be discharged, the distributed control system determines automatic sludge discharge time according to the sample water sedimentation ratio result and a preset condition.
9. The method of controlling automatic sludge discharge from a mechanically accelerated clarifier according to claim 7, wherein the method further comprises the steps of:
and according to the flushing instruction sent by the controller, after sample water in the sampling container is emptied, atomizing, flushing and pulse scrubbing are carried out on the sampling container.
10. The automatic sludge discharge control method of the mechanical accelerated clarifier according to claim 9, wherein the step of acquiring and analyzing the image of the sludge-water interface by the visual analysis unit to obtain the liquid level of the sludge-water interface comprises:
acquiring a mud-water interface image comprising a mud-water interface and the height of mud;
and identifying and analyzing the muddy water interface image to obtain the liquid level of the muddy water interface.
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| KR101923165B1 (en) * | 2018-07-04 | 2018-11-28 | (주)리테크 | Digital filter type ultrasonic sludge interface measurement apparatus for display sludge interface shape as a color image |
| CN212016855U (en) * | 2019-11-06 | 2020-11-27 | 华电电力科学研究院有限公司 | Full-automatic operation control system of mechanical acceleration clarification tank |
| DE202021105047U1 (en) * | 2021-04-19 | 2021-09-29 | Xi'an Thermal Power Research Institute Co., Ltd | Online monitoring device for mechanically accelerated clarifiers |
| CN216366774U (en) * | 2021-10-19 | 2022-04-26 | 重庆三颗草科技有限公司 | Sedimentation tank sludge control system based on image recognition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101923165B1 (en) * | 2018-07-04 | 2018-11-28 | (주)리테크 | Digital filter type ultrasonic sludge interface measurement apparatus for display sludge interface shape as a color image |
| CN212016855U (en) * | 2019-11-06 | 2020-11-27 | 华电电力科学研究院有限公司 | Full-automatic operation control system of mechanical acceleration clarification tank |
| DE202021105047U1 (en) * | 2021-04-19 | 2021-09-29 | Xi'an Thermal Power Research Institute Co., Ltd | Online monitoring device for mechanically accelerated clarifiers |
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