CN112903546A - Automatic on-line monitoring system for sludge settlement ratio - Google Patents
Automatic on-line monitoring system for sludge settlement ratio Download PDFInfo
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- CN112903546A CN112903546A CN202110371642.2A CN202110371642A CN112903546A CN 112903546 A CN112903546 A CN 112903546A CN 202110371642 A CN202110371642 A CN 202110371642A CN 112903546 A CN112903546 A CN 112903546A
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- 239000010802 sludge Substances 0.000 title claims abstract description 56
- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 239000010865 sewage Substances 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000004506 ultrasonic cleaning Methods 0.000 claims abstract description 7
- 239000012780 transparent material Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 21
- 238000004062 sedimentation Methods 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 description 19
- 238000004140 cleaning Methods 0.000 description 16
- 238000005070 sampling Methods 0.000 description 16
- 239000008399 tap water Substances 0.000 description 11
- 235000020679 tap water Nutrition 0.000 description 9
- 238000000605 extraction Methods 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 230000001960 triggered effect Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 230000008713 feedback mechanism Effects 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000007405 data analysis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011157 data evaluation Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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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- Chemical & Material Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Activated Sludge Processes (AREA)
Abstract
An automatic on-line monitoring system for sludge settlement ratio is used for detecting the sludge settlement ratio of sewage in a sewage treatment process, and comprises a measuring cylinder, wherein the side wall of the measuring cylinder is made of transparent materials and is used for containing the sewage to be detected; the measuring cylinder is connected with an input port of the clear water pipeline, a sewage injection port and a sewage discharge port; the laser emitter is arranged on one side of the measuring cylinder; the laser receiver is arranged on the other side of the measuring cylinder and is opposite to the laser transmitter; and the main controller is used for controlling and receiving the working states and the output data of the laser transmitter and the laser receiver. An ultrasonic cleaning generator is arranged in the measuring cylinder. The laser transmitter and the laser receiver are arranged on a support which can be controlled to move along the side wall of the measuring cylinder.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to an automatic online monitoring system for a sludge settlement ratio.
Background
In the actual production operation of a sewage plant, the sludge sedimentation ratio is an important parameter for indicating the operation effect of the process, in the conventional method, manual measurement is generally adopted, the mixed activated sludge mixed liquid of a uniformly mixed aeration tank is quickly poured into a 1000ml measuring cylinder to reach full scale, and after standing and settling for 30 minutes, the volume ratio of the precipitated sludge to the taken mixed liquid is the sludge sedimentation ratio. The manual measurement is easily influenced by environmental factors and human factors, the sedimentation process is not conveniently fed back to the central control room in time, and the process cannot be quickly and accurately adjusted. In particular, the drawbacks of manual measurement include,
the method has the advantages that sampling points are multiple and dispersed, the working strength is increased, the observation of the flocculation and sedimentation processes of the activated sludge is easy to ignore, and the information prompted in the determination process is difficult to obtain;
secondly, under the condition of night or extremely severe weather, environmental factors can cause the deviation of the measurement result and also influence the self safety of workers;
and artificial factors such as the position of a sampling point, the sampling depth, the sampling volume and the like can depend on the operation of a worker to a certain extent, so that the deviation of a measuring result is caused.
Disclosure of Invention
In one embodiment of the present invention, an automatic on-line monitoring system for sludge settling ratio is provided for detecting the sludge settling ratio of sewage in a sewage treatment process, the system comprises,
the side wall of the measuring cylinder is made of transparent materials and is used for containing sewage to be measured, and the measuring cylinder is connected with the clean water pipeline input port, the sewage injection port and the sewage discharge port;
the laser emitter is arranged on one side of the measuring cylinder;
the laser receiver is arranged on the other side of the measuring cylinder and is opposite to the laser transmitter;
and the main controller is used for controlling and receiving the working states and the output data of the laser transmitter and the laser receiver.
An ultrasonic cleaning generator is arranged in the measuring cylinder. The laser transmitter and the laser receiver are arranged on a support which can be controlled to move along the side wall of the measuring cylinder. The support is fixedly connected with the end part of a linear telescopic rod, and the linear telescopic rod is driven by a motor to perform telescopic motion.
The automatic online monitoring system for the sludge settlement ratio, provided by the embodiment of the invention, completes automatic detection of a sludge settlement ratio test through the water sample extraction device and the laser signal processing and identifying device, aims to solve the problem of deviation of a measurement result caused by environmental factors and human factors, solves the problem of potential safety hazard caused by measurement performed by workers in severe weather, and meanwhile, pays attention to the measurement process of the sludge settlement ratio and actively cooperates with construction of intelligent water affairs.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
FIG. 1 is a schematic diagram of the composition of an automatic on-line monitoring system for sludge settlement ratio according to one embodiment of the present invention.
FIG. 2 is a schematic diagram of a cleaning process of the inspection system according to one embodiment of the present invention.
FIG. 3 is a schematic diagram of a sampling procedure of a detection system according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a measurement link of a detection system according to an embodiment of the present invention.
1-linear telescopic mechanical rod, 2-stepping motor, 3-PLC and signal controller, 4-rigid structure support, 5-high liquid level sensor, 6-ultrasonic cleaning generator, 7-full liquid level sensor, 8-graduated cylinder, 9-sample bypass electromagnetic valve, 10-sample bypass throttle valve, 11-laser receiver, 12-laser emitter, 13-low liquid level sensor, 14-sewage sample electromagnetic valve, 15-tap water electromagnetic valve, 16-graduated cylinder discharge valve, 17-sample pump, 18-tap water pipeline input, 19-sewage discharge port, 20-sewage sample inlet, 21-waterproof camera, 22-network transmission module, 23-touch liquid crystal display screen.
Detailed Description
According to one or more embodiments, as shown in fig. 1, an automatic online monitoring system for sludge settlement ratio mainly comprises a graduated cylinder cleaning mechanism, a water sample extraction mechanism and a result measurement feedback mechanism, and can realize four functions of cleaning, sampling, measuring, signal transmission and the like.
The main cleaning component in the measuring cylinder cleaning mechanism is an ultrasonic cleaner, and the sludge attached to the wall of the measuring cylinder is peeled off by utilizing the cavitation of ultrasonic waves, so that the aim of high-efficiency cleaning is fulfilled. By controlling an electromagnetic valve on a tap water pipeline, tap water is injected into the measuring cylinder, after the water level in the measuring cylinder triggers the full liquid level sensor, water inlet is stopped, and the ultrasonic cleaner is started at the same time. After the cleaning is finished, the discharge valve is opened to discharge the waste liquid.
The main component for determining the sampling quantity in the water sample extraction mechanism is a high liquid level sensor. And (3) injecting sewage into the measuring cylinder by utilizing the linkage of the sampling pump and the electromagnetic valve on the sampling tube, stopping sampling after the water level in the equivalent cylinder triggers the high liquid level sensor, and closing the sampling pump and the electromagnetic valve to finish one-time sampling.
The main components in the result measurement feedback mechanism are a laser transmitter, a laser receiver and a PLC. Sludge level signals in the laser detection cylinder are controlled by the stepping motor, the laser signals are identified and processed by the local PLC to obtain settlement ratio data, and the data are transmitted to the central control room through the network module. Meanwhile, the measuring process of the sludge settlement ratio is transmitted to the central control room in real time through the network transmission module by the waterproof camera.
According to one or more embodiments, the automatic online monitoring system for the sludge settlement ratio mainly comprises a measuring cylinder cleaning mechanism, a water sample extraction mechanism and a result measurement feedback mechanism, and can realize four functions of cleaning, sampling, measuring, signal transmission and the like. The following is detailed in terms of system functionality:
(1) cleaning, as shown in fig. 2.
a. And (5) cleaning before measurement. And opening a tap water electromagnetic valve, injecting tap water from the side surface of the bottom end of the measuring cylinder, and closing the tap water electromagnetic valve after the full liquid level sensor is triggered by a signal. The ultrasonic cleaning generator was started and kept running for 3 minutes. And opening a measuring cylinder discharge valve, discharging waste liquid, and closing the measuring cylinder discharge valve after the signal of the low liquid level sensor is triggered to finish cleaning.
b. And (5) cleaning after measurement. And opening a measuring cylinder discharge valve, discharging sewage, and closing the measuring cylinder discharge valve after a signal of the low liquid level sensor is triggered. And opening a tap water electromagnetic valve, injecting tap water from the side surface of the bottom end of the measuring cylinder, and closing the tap water electromagnetic valve after the full liquid level sensor is triggered by a signal. The ultrasonic cleaning generator was started and kept running for 3 minutes. And opening a measuring cylinder discharge valve, discharging waste liquid, and closing the measuring cylinder discharge valve after the signal of the low liquid level sensor is triggered to finish cleaning.
(2) Sampling, as shown in fig. 3.
And opening a sample introduction bypass electromagnetic valve and a sample introduction bypass throttle valve, and starting a sample introduction pump to rotate positively. And after 30 seconds, opening the sewage sample injection solenoid valve, closing the sample injection bypass solenoid valve and the sample injection bypass throttle valve, and injecting sewage from the side surface of the bottom end of the measuring cylinder. And after the signal of the high liquid level sensor is triggered, closing the sewage sample injection electromagnetic valve and the sample injection pump to finish sample injection. Standing for 30 minutes.
Partial sewage is left in the sample inlet pipe, in order to prevent sludge from settling in the sample inlet pipe and blocking the sample inlet pipe, a sample inlet bypass electromagnetic valve and a sample inlet bypass throttle valve need to be opened, a sample inlet pump is started to reversely rotate, and the residual sewage in the sample inlet pipe is introduced into a sewage discharge pipe. And after the discharging is finished, closing the sample injection bypass electromagnetic valve, the sample injection bypass throttle valve and the sample injection pump. The effect of advance a kind bypass is that the interior unnecessary sewage of sample pipeline after the outflow sample prevents that mud from subsiding and blockking up the pipeline. The bypass valve is opened by the forward rotation sample injection pump in order to obtain a correct detection sewage sample. 1. The sludge has settleability, and a water sample which flows in first cannot truly reflect actual sewage; 2. the sewage enters the sample feeding bypass for 30s and can also wash the sample feeding bypass. The reverse sample injection pump is used for enabling residual sewage in the sample injection pipe to flow into the sewage discharge pipe through the sample injection bypass.
(3) Measurement, as shown in fig. 4.
After standing for 30 minutes, the PLC controls the stepping motor to move the laser emitting and receiving device, reads a receiver brightness signal on a laser scanning path, calculates a peak value curve of difference components in real time, calculates a sludge settlement ratio, and displays data on a touch liquid crystal display screen to finish measurement.
Meanwhile, a waterproof camera is used for shooting the measuring process of the sludge settlement ratio.
(4) And (5) signal transmission.
And the measured data of the sludge settlement ratio is transmitted to the central control room by the PLC through the network transmission module. The measuring process of the sludge settlement ratio is transmitted to the central control room in real time by the waterproof camera through the network transmission module.
According to one or more embodiments, an automatic on-line monitoring system for sludge settling ratio for detecting sludge settling ratio of sewage in a sewage treatment process, the system comprising:
a measuring cylinder, the side wall of which is made of transparent material and is used for containing sewage to be measured,
the measuring cylinder is connected with an input port of the clear water pipeline, a sewage injection port and a sewage discharge port;
the camera is opposite to the measuring cylinder and is used for shooting the sludge sedimentation process of the measuring cylinder;
and the main controller is used for controlling and receiving the working state and the output data of the camera.
The monitoring system samples and statically deposits for 30 minutes, the camera shoots the sludge picture in the measuring cylinder, the sedimentation ratio data is obtained through picture recognition processing of a local computer, and then the cleaning device is controlled to clean the measuring cylinder. One copy of the sedimentation ratio data is stored in the local computer database and one copy is transmitted to the central control room.
According to one or more embodiments, the automatic online monitoring system for the sludge settlement ratio is characterized in that the monitoring system performs sampling and static settling for 30 minutes, the ultrasonic sludge interface sensor directly measures the thickness of sludge in a measuring cylinder, the local PLC calculates the settlement ratio data, and then the cleaning device is controlled to clean the measuring cylinder. And the sedimentation ratio data is transmitted to a central control room by the PLC through a network module. The specific measurement principle is that a stepping motor moves a laser emitting and receiving device, a receiver brightness signal is read on a laser scanning path, a peak value curve of difference components is calculated in real time, and a sludge settlement ratio is calculated. The number of the rotating angles of the stepping motor corresponding to the peak value of the brightness signal curve obtained on the scanning path has a certain linear relation with the actual sedimentation value.
The calibration and calibration method of the monitoring system comprises the following steps: a fixed light screen with the height of a is arranged on the scanning path for scanning, and the number a of the rotating angles of the stepping motor corresponding to the peak value of the brightness signal curve can be obtained1(ii) a Another fixed light shielding plate with height b is arranged for scanning to obtain the peak of the brightness signal curveThe number b of the rotating angles of the stepping motor corresponding to the value1. And calculating the relation between the rotating angle number of the stepping motor corresponding to the peak value of the brightness signal curve and the actual settlement value through the obtained two groups of data, namely finishing one-time calibration and calibration.
The invention utilizes the pump, the electromagnetic valve and the liquid level sensor to build the water sample extraction device, and can clean the sewage pipeline. The data analysis can adopt a laser signal processing and identifying device. And reading the brightness signal of the laser receiver on the laser scanning path, calculating the peak value curve of the difference component in real time, and calculating the sludge settlement ratio.
Therefore, the beneficial effects of the invention include:
the automatic online monitoring system for the sludge settlement ratio mainly comprises a water sample extraction device and a laser signal processing and identifying device, can improve the convenience and accuracy of sludge settlement ratio measurement, and reduces potential safety hazards.
And the system reliability is high. The moving mechanical structure in the system mainly comprises an electromagnetic valve, a linear telescopic mechanical rod and a stepping motor, and the control system is a small PLC. These parts are widely used in conventional industrial fields and have high reliability and stability.
And the system maintenance amount is small. During normal working, the measuring cylinder is automatically operated for ultrasonic cleaning, and only tap water supply is ensured, and the sewage sampling pipe is cleaned regularly. The use of a fixed shutter allows for a very simple and convenient calibration of periodic measurements.
And fourthly, the sludge settlement ratio measurement result is synchronously stored in the local and central control rooms, and the intelligent water service can be connected for big data analysis and evaluation of the production and operation conditions of the sewage plant.
Fifthly, the sludge sedimentation process can be transmitted to a central control room in real time through a camera, so that workers can observe the sedimentation process conveniently, effective information can be obtained timely, and the process can be adjusted quickly and accurately.
It should be noted that while the foregoing has described the spirit and principles of the invention with reference to several specific embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in these aspects cannot be combined. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (11)
1. An automatic on-line monitoring system for sludge sedimentation ratio, which is used for detecting the sludge sedimentation ratio of sewage in the sewage treatment process, comprises,
a measuring cylinder, the side wall of which is made of transparent material and is used for containing sewage to be measured,
the measuring cylinder is connected with an input port of the clear water pipeline, a sewage injection port and a sewage discharge port;
the laser emitter is arranged on one side of the measuring cylinder;
the laser receiver is arranged on the other side of the measuring cylinder and is opposite to the laser transmitter;
and the main controller is used for controlling and receiving the working states and the output data of the laser transmitter and the laser receiver.
2. The automatic on-line monitoring system for sludge settlement ratio according to claim 1, wherein an ultrasonic cleaning generator is arranged in the measuring cylinder.
3. The system for automatically monitoring the sludge sedimentation ratio in-line as claimed in claim 1, wherein the laser transmitter and the laser receiver are arranged on a support which can be controlled to move along the side wall of the measuring cylinder.
4. The automatic on-line sludge settlement ratio monitoring system as claimed in claim 3, wherein the bracket is fixedly connected to an end of a linear telescopic rod, and the linear telescopic rod is driven by a motor to perform telescopic motion.
5. The automatic online monitoring system for the sludge settlement ratio according to claim 1, wherein a low liquid level sensor, a high liquid level sensor and/or a full liquid level sensor are arranged in the measuring cylinder.
6. The automatic on-line monitoring system for sludge settlement ratio as claimed in claim 5, wherein the measuring cylinder is communicated with the sewage discharge port through a measuring cylinder discharge valve.
7. The system according to claim 5, wherein the sewage sample inlet is connected to a sample pump, the output of the sample pump is connected to the measuring cylinder through a sewage sample solenoid valve, and the output of the sample pump is connected to the sewage discharge port through a sample bypass throttle valve and a sample bypass solenoid valve.
8. The automatic online monitoring system for the sludge settlement ratio according to claim 1, wherein the main controller is composed of a PLC, a network transmission module and a display screen.
9. The system for automatically monitoring the sludge sedimentation ratio on line as claimed in claim 1, further comprising a camera facing the measuring cylinder.
10. An automatic on-line monitoring system for sludge sedimentation ratio, which is used for detecting the sludge sedimentation ratio of sewage in the sewage treatment process, comprises,
a measuring cylinder, the side wall of which is made of transparent material and is used for containing sewage to be measured,
the measuring cylinder is connected with an input port of the clear water pipeline, a sewage injection port and a sewage discharge port;
the camera is opposite to the measuring cylinder and is used for shooting the sludge sedimentation process of the measuring cylinder;
and the main controller is used for controlling and receiving the working state and the output data of the camera.
11. An automatic on-line monitoring system for sludge sedimentation ratio, which is used for detecting the sludge sedimentation ratio of sewage in the sewage treatment process, comprises,
a measuring cylinder, the side wall of which is made of transparent material and is used for containing sewage to be measured,
the measuring cylinder is connected with an input port of the clear water pipeline, a sewage injection port and a sewage discharge port;
the ultrasonic sludge interface sensor is used for directly measuring the thickness of sludge in the measuring cylinder;
and the main controller is used for controlling and receiving the working state and the output data of the camera.
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