CN111056622A - Head Loss Monitoring and Control System for Biological Aerated Filters - Google Patents
Head Loss Monitoring and Control System for Biological Aerated Filters Download PDFInfo
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Abstract
本发明提供了一种用于曝气生物滤池的水头损失监测控制系统，包括监测模块、控制模块、以及反冲洗系统，监测模块包括用于对曝气生物滤池进水处的压力进行实时监测的第一监测装置和用于对曝气生物滤池出水处的压力进行实时监测的第二监测装置，控制模块接收第一监测装置和第二监测装置的采集的压力信号，并根据第一监测装置和第二监测装置传输至控制模块的压力信号的分析处理结果，控制反冲洗系统对曝气生物滤池进行反冲洗动作，以使曝气生物滤池的水头损失恢复正常。本发明较容易地实现对曝气生物滤池水头损失异常进行实时在线监测并辨识控制，达到对曝气生物滤池水头损失异常情况进行及时、准确的智能判定和高效合理地控制处理的目的。
The invention provides a water head loss monitoring and control system for a biological aeration filter, including a monitoring module, a control module, and a backwashing system. The first monitoring device for monitoring and the second monitoring device for real-time monitoring of the pressure at the outlet of the biological aerated filter, the control module receives the pressure signals collected by the first monitoring device and the second monitoring device, and according to the first monitoring device and the second monitoring device. The analysis and processing results of the pressure signals transmitted by the monitoring device and the second monitoring device to the control module are used to control the backwashing system to perform a backwashing action on the biological aerated filter, so as to restore the head loss of the biological aerated filter to normal. The invention easily realizes real-time online monitoring and identification control of abnormal water head loss in the biological aeration filter, and achieves the purpose of timely and accurate intelligent determination and efficient and reasonable control and processing of abnormal water head loss in the biological aeration filter.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a head loss monitoring and controlling system for a biological aerated filter.
Background
The aeration biological filter is a sewage treatment device which adopts a biomembrane method to treat sewage and integrates biodegradation and solid-liquid separation. At present, when a biological aerated filter is used as sewage treatment equipment, a granular filler with a high specific area is usually filled in the biological aerated filter to serve as a carrier for growth of a biological film, and aeration is carried out at the lower part of a biological film filter material layer to provide an oxygen source for microorganisms on the granular filler carrier, so that organic pollutants in sewage are biodegraded under the action of the biological film on the surface of the granular filler, and the aim of purifying the sewage is fulfilled. However, with the increase of the operation time of the biological aerated filter, the solid matters in the biological membrane filter material layer gradually increase, so that the abnormal water head loss of the biological aerated filter is caused.
However, the head loss of the biological aerated filter is not easy to judge, the basis of the change of the effluent quality often has serious hysteresis, and the analysis and judgment of the maximum time limit empirical value determined manually according to the change condition of the effluent quality also often has certain subjectivity, so that the judgment and the treatment of abnormal conditions of the head loss of the biological aerated filter are not timely and inaccurate, and the effluent quality of the biological aerated filter is easy to deteriorate to influence the sewage treatment effect.
Disclosure of Invention
The invention aims to provide a head loss monitoring and controlling system for a biological aerated filter, and aims to solve the problem that the abnormal head loss of the biological aerated filter is difficult to timely and accurately judge, so that the effluent quality of the biological aerated filter is easy to deteriorate to influence the sewage treatment effect in the prior art.
In order to achieve the above object, the technical scheme adopted by the invention is to provide a head loss monitoring and controlling system for a biological aerated filter, which comprises a monitoring module for monitoring the head loss of the biological aerated filter, a control module for analyzing and processing the head loss data collected by the monitoring module, a water quality detection system for sampling and detecting the effluent quality of the biological aerated filter, and a backwashing system for backwashing the biological aerated filter, the monitoring module comprises a first monitoring device for monitoring and acquiring the pressure of the water inlet of the biological aerated filter in real time and a second monitoring device for monitoring and acquiring the pressure of the water outlet of the biological aerated filter in real time, the water quality detection system, the first monitoring device, the second monitoring device and the backwashing system are respectively and electrically connected with the control module; the control module receives and analyzes and processes the pressure signal acquired by the first monitoring device and the pressure signal acquired by the second monitoring device to obtain the head loss value, and controls the backwashing system to perform backwashing action on the biological aerated filter when the head loss value is within a critical head loss range;
the critical head loss range is obtained by the following method:
the control module calculates the head loss value corresponding to each time point according to the pressure signal acquired by the first monitoring device and the pressure signal acquired by the second monitoring device, and successively records the head loss value corresponding to each time point as delta h according to the sequence of acquisition timenWherein n is a continuous natural number greater than 1; the control module calculates the waterhead loss value delta h acquired at each time point successivelynHead loss value Deltah collected at last time point corresponding to each time pointn-1The rate of change δ of; when the delta is larger than 5%, the control module controls the water quality detection system to perform sampling detection on the effluent quality of the biological aerated filter; when the effluent quality does not reach the standard, recording that the effluent quality does not reach the standardThe head loss value Deltah corresponding to each time point in time calibrationnThe control module controls the back washing system to carry out back washing, and sampling detection and recording are stopped until the effluent quality reaches the standard; repeating the above process to obtain the fluctuating head loss value delta h which is acquired at each time point when the effluent quality does not reach the standardnSo as to determine the critical head loss range of the backwashing.
Furthermore, the head loss monitoring and control system further comprises a cloud platform system for background monitoring and a communication module for transmitting the pressure data analyzed and processed by the control module to the cloud platform system.
Further, the head loss monitoring and controlling system further comprises a mobile terminal for remote operation monitoring, and the mobile terminal is connected with the cloud platform system through a wireless network.
Further, the mobile terminal adopts a smart phone.
Furthermore, the head loss monitoring and control system further comprises a signal conditioning module for performing analog-to-digital conversion on the electric signal of the monitoring module, the signal conditioning module comprises a first analog-to-digital converter for performing analog-to-digital conversion on the pressure signal acquired by the first monitoring device, the first monitoring device is electrically connected with the first analog-to-digital converter, and the first analog-to-digital converter is electrically connected with the control module.
Furthermore, the signal conditioning module further includes a second analog-to-digital converter for performing analog-to-digital conversion on the pressure signal acquired by the second monitoring device, the second monitoring device is electrically connected with the second analog-to-digital converter, and the second analog-to-digital converter is electrically connected with the control module.
Furthermore, the first monitoring device adopts a first pressure sensor, and the first pressure sensor, the first analog-to-digital converter and the control module are electrically connected in sequence.
Furthermore, the second monitoring device adopts a second pressure sensor, and the second pressure sensor, the second analog-to-digital converter and the control module are electrically connected in sequence.
Furthermore, the first pressure sensor is arranged at the water inlet position at the bottom of the biological aerated filter, and the second pressure sensor is arranged at the water outlet position at the top of the biological aerated filter.
Furthermore, the head loss monitoring and control system further comprises an early warning module for judging whether the head loss value is preset within the critical head loss range, and the early warning module is electrically connected with the cloud platform system.
The water head loss monitoring and controlling system for the biological aerated filter has the beneficial effects that: compared with the prior art, the head loss monitoring and controlling system for the biological aerated filter, provided by the invention, has the advantages that the first monitoring device and the second monitoring device are respectively and correspondingly arranged at the water inlet part and the water outlet part of the biological aerated filter to monitor the head loss of the biological aerated filter in real time, the head loss data monitored by the first monitoring device and the second monitoring device are analyzed and processed by the control module, whether the head loss is abnormal or not is analyzed and judged, and the backwashing action of the backwashing system on the biological aerated filter is controlled according to the analysis and judgment result of whether the head loss is abnormal or not, so that the head loss of the biological aerated filter is recovered to be normal, the online real-time monitoring on the head loss of the biological aerated filter and the identification and control on the head loss abnormality of the biological aerated filter are more easily realized, and the purposes of timely carrying out on the abnormal condition of the head loss of the biological, The accurate and intelligent judgment is carried out, and the purpose of efficiently and reasonably processing the abnormal condition of the head loss of the biological aerated filter is achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a flow chart of functional modules of a head loss monitoring and controlling system for a biological aerated filter according to the embodiment of the invention;
fig. 2 is a schematic structural diagram of a head loss monitoring and controlling system for a biological aerated filter according to an embodiment of the invention.
Wherein, in the drawings, the reference numerals are mainly as follows:
1-a monitoring module; 11-a first monitoring device; 12-a second monitoring device; 2-a control module; 3-a backwashing system; 4-a cloud platform system; 5-a communication module; 6-a mobile terminal; 7-a signal conditioning module; 71-a first analog-to-digital converter; 72-a second analog-to-digital converter; 8, an early warning module; 9-aeration biological filter; 10-water quality detection system.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 2 together, a head loss monitoring and controlling system for a biological aerated filter according to the present invention will now be described. The invention provides a head loss monitoring and controlling system for a biological aerated filter, which comprises a monitoring module 1 for monitoring head loss of the biological aerated filter 9, a control module 2 for analyzing and processing head loss data monitored and collected by the monitoring module 1, a water quality detecting system 10 for sampling and detecting water quality at a water outlet of the biological aerated filter 9, and the backwashing system 3 is used for backwashing the biological aerated filter 9, the monitoring module 1 comprises a first monitoring device 11 and a second monitoring device 12, the first monitoring device 11 is used for monitoring and acquiring the pressure of the water inlet of the biological aerated filter 9 in real time, the second monitoring device 12 is used for monitoring and acquiring the pressure of the water outlet of the biological aerated filter 9 in real time, and the water quality detection system 10, the first monitoring device 11, the second monitoring device 12 and the backwashing system 3 are respectively and electrically connected with the control module 2. The control module 2 receives and analyzes the pressure signal acquired by the first monitoring device 11 and the pressure signal acquired by the second monitoring device 12 to obtain a head loss value, and controls the backwashing system 3 to perform backwashing action on the biological aerated filter when the head loss value is within a critical head loss range, so that the head loss of the biological aerated filter 9 is recovered to be normal.
Wherein, the quality of the inlet water at the inlet of the biological aerated filter 9 has certain fluctuation (for example, the content of suspended solid SS in the inlet water usually fluctuates above or below the average value), which results in different head loss values under different inlet water quality conditions. The control module 2 collects the pressure signal in real time according to the first monitoring device 11And the pressure signal acquired by the second monitoring device 12 in real time calculates the head loss value corresponding to each time point, and successively records the head loss value corresponding to each time point as delta h according to the sequence of acquisition timenWherein n is a continuous natural number greater than 1; the control module 2 then calculates the head loss value (Δ h) acquired at each time point one by onen) Head loss value (Δ h) acquired at the previous time point corresponding to each time pointn-1) The rate of change δ, i.e. δ is (Δ h)n－Δhn-1An and Δ hn-1The ratio of (A) to (B); when the delta is larger than 5 percent, the control module 2 controls the water quality detection system 10 to sample and detect the effluent water quality of the biological aerated filter; when the quality of the effluent water reaches the standard, continuing sampling and detecting; when the effluent quality does not reach the standard, recording the head loss value delta h corresponding to each time point when the effluent quality does not reach the standardnThe control module 2 controls the backwashing system 3 to perform backwashing, and sampling detection and recording are stopped until the effluent quality reaches the standard; repeating the above process to obtain corresponding and fluctuating head loss value delta h collected at each time point when the effluent quality does not reach the standardnSo as to determine the critical head loss range of the backwashing.
In the specific operation process, in order to ensure the accuracy of determining the critical head loss range, the corresponding head loss value delta h is used when the effluent quality does not reach the standardnThe recorded number of sampling detection is not less than 50. Theoretically, according to the method for obtaining the critical head loss range, the corresponding head loss value delta h when the effluent quality does not reach the standardnThe more the sampling detection is, the more accurate the determined critical head loss range is, and the corresponding head loss value delta h is when the effluent quality does not reach the standardnThe recorded value of the sampling detection can be selected according to the actual precision requirement, and is not limited herein.
When the head loss monitoring control system for the biological aerated filter provided by the invention works: the first monitoring device 11 is arranged at the water inlet of the biological aerated filter 9, collects a first pressure signal at the water inlet of the biological aerated filter 9 in real time, and transmits the first pressure signal collected in real time to the control module 2; meanwhile, a second monitoring device 12 arranged at the water outlet of the biological aerated filter 9 collects a second pressure signal at the water outlet of the biological aerated filter 9 in real time and transmits the second pressure signal collected in real time to the control module 2. Firstly, the control module 2 carries out data analysis processing on a first pressure signal and a second pressure signal received in real time and obtains a first pressure value and a second pressure value corresponding to the first pressure signal and the second pressure signal; secondly, the control module 2 calculates a difference value (namely a head loss value delta h) between the first pressure value and the second pressure value according to a preset data processing program; in the subsequent working process, the control module 2 only needs to judge whether the real-time head loss value delta h falls into the critical head loss range or not, and converts the judgment result into a corresponding real-time control signal to control the backwashing system 3 to perform backwashing action on the biological aerated filter 9, so that the purposes of performing online real-time intelligent judgment on abnormal head loss change conditions of the biological aerated filter 9 and efficiently and reasonably processing the abnormal head loss conditions of the biological aerated filter 9 are achieved. The head loss monitoring and controlling system for the biological aerated filter, provided by the embodiment, can monitor the abnormal situation of head loss of the biological aerated filter 9 on line in real time, judge whether backwashing is needed or not by observing head loss instead of frequent sampling analysis of the water quality of inlet water or the water quality of outlet water, and do not determine whether the biological aerated filter 9 has abnormal head loss and needs backwashing by manually adopting water quality deterioration as a judgment sign, so that the workload of manually observing head loss is reduced, and whether the biological aerated filter 9 has abnormal head loss can be judged more conveniently, quickly, accurately and timely, so that the backwashing frequency is designed and adjusted more efficiently and the backwashing period is determined, and the backwashing effect of the backwashing system 3 on the biological aerated filter 9 is optimized.
Compared with the prior art, the head loss monitoring and controlling system for the biological aerated filter, provided by the invention, has the advantages that the first monitoring device 11 and the second monitoring device 12 are respectively and correspondingly arranged at the water inlet and the water outlet of the biological aerated filter 9 so as to monitor the head loss of the biological aerated filter 9 in real time, and then the head loss data monitored by the first monitoring device 11 and the second monitoring device 12 are analyzed and processed by the control module 2. The control module 2 makes an analysis judgment on whether the head loss is abnormal according to the analysis processing result of the head loss data, and controls the back flushing system 3 to perform back flushing action on the biological aerated filter 9 according to the analysis judgment result on whether the head loss is abnormal, so that the head loss of the biological aerated filter 9 is recovered to be normal, the online real-time monitoring on the head loss of the biological aerated filter 9 and the identification control on the abnormal head loss of the biological aerated filter 9 are easily realized, the purposes of timely and accurately intelligently judging the abnormal head loss condition of the biological aerated filter 9 and efficiently and reasonably processing the abnormal head loss condition of the biological aerated filter 9 are achieved.
Specifically, the control module 2 employs a CPU (central processing unit) including a data operation logic section, a data storage section, and a control section.
Further, referring to fig. 1, as a specific implementation manner of the embodiment of the head loss monitoring control system for the biological aerated filter provided by the present invention, the head loss monitoring control system further includes a cloud platform system 4 for background operation management and monitoring, and a communication module 5 for transmitting the pressure data analyzed and processed by the control module 2 to the cloud platform system 4. The first monitoring device 11 and the second monitoring device 12 monitor the head loss of the biological aerated filter 9 on line in real time, transmit a head loss signal monitored in real time to the control module 2 for analysis and processing, the communication module 5 transmits a real-time head loss value delta h obtained by calculation after the analysis and processing of the control module 2 in real time to the cloud platform system 4, and the cloud platform system 4 stores the head loss value delta h and carries out statistical analysis on the head loss value delta h acquired in all time periods so as to form a curve of the head loss value delta h along with the change of time. The cloud platform system 4 judges whether the head loss value delta h falls into the critical head loss range according to the curve of the head loss value delta h along with the change of time, the judgment result is converted into a corresponding real-time control signal and then is transmitted back to the control module 2 through the communication module 5, and the control module 2 controls the back washing system 3 to carry out back washing action on the biological aerated filter 9 according to the online real-time monitoring judgment result of the cloud platform system 4, so that online real-time intelligent judgment on the abnormal head loss change condition of the biological aerated filter 9 is realized, and the purpose of efficiently and reasonably processing the abnormal head loss condition of the biological aerated filter 9 is realized. The head loss monitoring and controlling system for the biological aerated filter, provided by the embodiment, monitors abnormal head loss conditions of the biological aerated filter 9 on line in real time through the cloud platform system 4, does not need to perform backwashing for determining whether the biological aerated filter 9 has abnormal head loss through manual adoption of a water quality deterioration judgment sign, reduces workload for manually observing the head loss and requiring frequent sampling and analysis, can more conveniently, quickly, accurately and timely judge whether the biological aerated filter 9 has abnormal head loss, so that backwashing frequency and backwashing period are more efficiently and reasonably designed and adjusted, and backwashing effect of the backwashing system 3 on the biological aerated filter 9 is optimized.
Further, referring to fig. 1 together, as a specific implementation manner of the embodiment of the head loss monitoring and controlling system for the biological aerated filter provided by the present invention, the head loss monitoring and controlling system further includes a mobile terminal 6 for remote operation and monitoring, the mobile terminal 6 is connected with the cloud platform system 4 through a wireless network, specifically, the wireless network may be any existing short-distance wireless network (such as a bluetooth network, a WIFI network, etc.) or any existing long-distance wireless network (such as a GPRS network, a mobile communication network, etc.). Any kind of existing intelligent control device (such as a notebook computer, a tablet computer, a smart phone, etc.) can be selected by the mobile terminal 6, and preferably, the smart phone with the APP installed is adopted by the mobile terminal 6. The cloud platform system 4 sends the curve of the head loss value delta h changing along with the time to the mobile terminal 6 through a wireless network, and the staff can monitor whether the curve of the head loss value delta h changing along with the time falls into the critical head loss range through a display screen of the mobile terminal 6 in real time, so that the staff can conveniently and visually monitor whether the head loss abnormality exists in the biological aerated filter 9, and can remotely monitor and monitor the head loss of the biological aerated filter 9 through the mobile terminal 6 at any time and any place.
Further, referring to fig. 1 together, as a specific implementation manner of the embodiment of the head loss monitoring control system for the biological aerated filter provided by the present invention, the head loss monitoring control system further includes a signal conditioning module 7 for performing analog-to-digital conversion on the electrical signal acquired by the monitoring module 1, the signal conditioning module 7 includes a first analog-to-digital converter 71 for performing analog-to-digital conversion on the pressure electrical signal acquired by the first monitoring device 11, the first monitoring device 11 is electrically connected to the first analog-to-digital converter 71, and the first analog-to-digital converter 71 is electrically connected to the control module 2. In this embodiment, the first analog-to-digital converter 71 for performing analog-to-digital conversion on the pressure electrical signal monitored and collected by the first monitoring device 11 is arranged, so that the pressure electrical signal monitored and collected by the first monitoring device 11 is quickly and accurately converted into pressure data, the speed and the accuracy of pressure data processing and analysis by the control module 2 are improved, and the accuracy of real-time monitoring and control processing of the head loss of the biological aerated filter 9 by the head loss monitoring and control system is improved.
Further, referring to fig. 1 together, as a specific implementation manner of the embodiment of the head loss monitoring control system for a biological aerated filter provided by the present invention, the signal conditioning module 7 further includes a second analog-to-digital converter 72 for performing analog-to-digital conversion on the pressure signal acquired by the second monitoring device 12, the second monitoring device 12 is electrically connected to the second analog-to-digital converter 72, and the second analog-to-digital converter 72 is electrically connected to the control module 2. In this embodiment, the second analog-to-digital converter 72 for performing analog-to-digital conversion on the pressure electrical signal monitored and collected by the second monitoring device 12 is arranged, so that the pressure electrical signal monitored and collected by the second monitoring device 12 is quickly and accurately converted into pressure data, the speed and the accuracy of pressure data processing and analysis by the control module 2 are improved, and the accuracy of real-time monitoring and control processing of the head loss of the biological aerated filter 9 by the head loss monitoring and control system is improved.
Further, referring to fig. 1 and fig. 2 together, as a specific implementation of the embodiment of the head loss monitoring control system for a biological aerated filter provided by the present invention, the first monitoring device 11 employs a first pressure sensor, the first pressure sensor is electrically connected to the first analog-to-digital converter 71, and the first analog-to-digital converter 71 is electrically connected to the control module 2, so as to monitor the water pressure at the water inlet of the biological aerated filter 9 in real time, and transmit the acquired real-time pressure data to the control module 2 in real time.
Further, referring to fig. 1 and fig. 2 together, as a specific implementation of the embodiment of the head loss monitoring control system for a biological aerated filter provided by the present invention, the second monitoring device 12 employs a second pressure sensor, the second pressure sensor is electrically connected to a second analog-to-digital converter 72, the second analog-to-digital converter 72 is electrically connected to the control module 2, so as to monitor the water pressure at the water outlet of the biological aerated filter 9 in real time, and transmit the acquired real-time pressure data to the central processing unit module in real time.
Further, referring to fig. 2, as a specific implementation of the embodiment of the head loss monitoring and controlling system for the biological aerated filter provided by the present invention, a first pressure sensor is disposed at the water inlet of the bottom of the biological aerated filter 9, and a second pressure sensor is disposed at the water outlet of the top of the biological aerated filter 9, so as to improve the head loss monitoring and controlling system
Further, referring to fig. 1, as a specific implementation manner of the embodiment of the head loss monitoring control system for the biological aerated filter provided by the present invention, the head loss monitoring control system further includes an early warning module 8 for determining whether the head loss value changes within a preset critical head loss range according to a time variation curve of the head loss value Δ h, and the early warning module 8 is electrically connected to the cloud platform system 4. When the early warning module 8 judges that the head loss value delta h changes within a preset critical head loss range according to the head loss value change curve along with time, the early warning module 8 converts the judgment result into an early warning signal and transmits the early warning signal to the cloud platform system 4, the cloud platform system 4 remotely transmits the early warning signal sent by the early warning module 8 to the mobile terminal 6 of a worker through a wireless network, so that the abnormal head loss change condition of the biological aerated filter 9 is informed to the worker, and the worker can timely give an early warning through the mobile terminal 6.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A head loss monitoring control system for a biological aerated filter is characterized in that: the system comprises a monitoring module for monitoring the head loss of the biological aerated filter, a control module for analyzing and processing the head loss data acquired by the monitoring module, a water quality detection system for sampling and detecting the water quality of the outlet water of the biological aerated filter, and a backwashing system for backwashing the biological aerated filter, wherein the monitoring module comprises a first monitoring device for monitoring and acquiring the pressure of the inlet water of the biological aerated filter in real time and a second monitoring device for monitoring and acquiring the pressure of the outlet water of the biological aerated filter in real time, and the water quality detection system, the first monitoring device, the second monitoring device and the backwashing system are respectively and electrically connected with the control module; the control module receives and analyzes and processes the pressure signal acquired by the first monitoring device and the pressure signal acquired by the second monitoring device to obtain the head loss value, and controls the backwashing system to perform backwashing action on the biological aerated filter when the head loss value is within a critical head loss range;
the critical head loss range is obtained by the following method:
the control module calculates the head loss value corresponding to each time point according to the pressure signal acquired by the first monitoring device and the pressure signal acquired by the second monitoring device, and successively records the head loss value corresponding to each time point as delta h according to the sequence of acquisition timenWherein n is a continuous natural number greater than 1; the control module calculates the waterhead loss value delta h acquired at each time point successivelynHead loss value Deltah collected at last time point corresponding to each time pointn-1The rate of change δ of; when delta is larger than 5%, the control module controls the water quality detection system to filter the aeration organismsSampling and detecting the effluent quality of the pool; when the effluent quality does not reach the standard, recording the head loss value delta h corresponding to each time point when the effluent quality does not reach the standardnThe control module controls the back washing system to carry out back washing, and sampling detection and recording are stopped until the effluent quality reaches the standard; repeating the above process to obtain the fluctuating head loss value delta h which is acquired at each time point when the effluent quality does not reach the standardnSo as to determine the critical head loss range of the backwashing.
2. A head loss monitoring and control system for a biological aerated filter according to claim 1, wherein: the head loss monitoring control system further comprises a cloud platform system for background monitoring and a communication module for transmitting the pressure data analyzed and processed by the control module to the cloud platform system.
3. A head loss monitoring and control system for a biological aerated filter according to claim 1, wherein: the waterhead loss monitoring and controlling system further comprises a mobile terminal for remote operation monitoring, and the mobile terminal is connected with the cloud platform system through a wireless network.
4. A head loss monitoring and control system for a biological aerated filter according to claim 3, wherein: the mobile terminal adopts a smart phone.
5. A head loss monitoring and control system for a biological aerated filter according to claim 1, wherein: the head loss monitoring and control system further comprises a signal conditioning module for performing analog-to-digital conversion on an electric signal of the monitoring module, wherein the signal conditioning module comprises a first analog-to-digital converter for performing analog-to-digital conversion on a pressure signal acquired by the first monitoring device, the first monitoring device is electrically connected with the first analog-to-digital converter, and the first analog-to-digital converter is electrically connected with the control module.
6. A head loss monitoring and control system for a biological aerated filter according to claim 5, wherein: the signal conditioning module further comprises a second analog-to-digital converter for performing analog-to-digital conversion on the pressure signal acquired by the second monitoring device, the second monitoring device is electrically connected with the second analog-to-digital converter, and the second analog-to-digital converter is electrically connected with the control module.
7. A head loss monitoring and control system for a biological aerated filter according to claim 6, wherein: the first monitoring device adopts a first pressure sensor, and the first pressure sensor, the first analog-to-digital converter and the control module are electrically connected in sequence.
8. A head loss monitoring and control system for a biological aerated filter according to claim 7, wherein: the second monitoring device adopts a second pressure sensor, and the second pressure sensor, the second analog-to-digital converter and the control module are electrically connected in sequence.
9. A head loss monitoring and control system for a biological aerated filter according to claim 8, wherein: the first pressure sensor is arranged at the water inlet position at the bottom of the biological aerated filter, and the second pressure sensor is arranged at the water outlet position at the top of the biological aerated filter.
10. A head loss monitoring and control system for a biological aerated filter according to claim 2, wherein: the head loss monitoring and control system further comprises an early warning module for judging whether the head loss value is preset within the critical head loss range, and the early warning module is electrically connected with the cloud platform system.
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