CN118162035A - Sewage treatment system based on intelligent control - Google Patents

Sewage treatment system based on intelligent control Download PDF

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Publication number
CN118162035A
CN118162035A CN202410606903.8A CN202410606903A CN118162035A CN 118162035 A CN118162035 A CN 118162035A CN 202410606903 A CN202410606903 A CN 202410606903A CN 118162035 A CN118162035 A CN 118162035A
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China
Prior art keywords
preset
stirring
sewage
concentration
condition
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CN202410606903.8A
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CN118162035B (en
Inventor
步德新
路敦利
肖振华
李少斌
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Jining Environmental Protection Science Research Institute Co ltd
Shandong Public Environmental Protection Technology Group Co ltd
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Jining Environmental Protection Science Research Institute Co ltd
Shandong Public Environmental Protection Technology Group Co ltd
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Priority to CN202410606903.8A priority Critical patent/CN118162035B/en
Publication of CN118162035A publication Critical patent/CN118162035A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/222—Control or regulation of the operation of the driving system, e.g. torque, speed or power of motors; of the position of mixing devices or elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/2132—Concentration, pH, pOH, p(ION) or oxygen-demand
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00—Aeration of stretches of water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/22—O2
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Activated Sludge Processes (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment system based on intelligent control, which comprises: the sedimentation tank is used for carrying out sedimentation degradation on pollutants in sewage; the aeration module is partially arranged above the sedimentation tank and comprises an aeration assembly and an aeration motor, wherein the aeration assembly is arranged on the side wall of the sedimentation tank and used for inputting air into sewage in the sedimentation tank, and the aeration motor is connected with the aeration assembly and used for providing operation power for the aeration assembly; the stirring module is partially arranged above the sedimentation tank; and the central control module is used for primarily adjusting the rotating speed of the stirring motor when the stability of the sewage treatment process is judged to be lower than the allowable range according to the average suspended matter concentration of the sewage, or adjusting the stirring height of the stirring assembly to a corresponding height according to the thickness change rate of the sludge at the bottom of the tank. The invention realizes the improvement of the stability and the sewage treatment accuracy in the sewage treatment process.

Description

Sewage treatment system based on intelligent control
Technical Field
The invention relates to the technical field of sewage treatment control systems, in particular to a sewage treatment system based on intelligent control.
Background
The sewage treatment control system in the prior art has the problems of multiple external interference factors and unstable operation, and also has the problem of excessive energy consumption for the sewage treatment precision.
Chinese patent publication No.: CN116135797a discloses a sewage treatment system based on intelligent control, which relates to the technical field of intelligent control, and acquires a surface state monitoring video of a pollutant to be treated, which is acquired by a camera; by adopting an artificial intelligence technology based on deep learning, dynamic change characteristic distribution information of the state characteristics of the pollutant surface along with the time dimension is mined, so that the activity characteristics of metabolism of microorganisms are accurately detected, and the feeding rate is adaptively adjusted based on the actual metabolism activity of the microorganisms. Therefore, the intelligent control-based sewage treatment system has the problem that the sewage treatment accuracy is reduced due to inaccurate determination of the sewage precipitation degree and inaccurate adjustment of the rotation speed of the stirring motor.
Disclosure of Invention
Therefore, the invention provides a sewage treatment system based on intelligent control, which is used for solving the problem of sewage treatment accuracy reduction caused by inaccurate determination of sewage precipitation degree and inaccurate regulation of stirring motor rotation speed in the prior art.
In order to achieve the above object, the present invention provides an intelligent control-based sewage treatment system, comprising: the sedimentation tank is used for carrying out sedimentation degradation on pollutants in sewage; the aeration module is partially arranged above the sedimentation tank and comprises an aeration assembly and an aeration motor, wherein the aeration assembly is arranged on the side wall of the sedimentation tank and used for inputting air into sewage in the sedimentation tank, and the aeration motor is connected with the aeration assembly and used for providing operation power for the aeration assembly; the stirring module is partially arranged above the sedimentation tank and comprises a stirring assembly for stirring sewage and a telescopic assembly which is partially arranged above the stirring assembly and used for changing the stirring height of the stirring assembly, and the stirring assembly comprises a stirring motor; the central control module is respectively connected with the sedimentation tank, the aeration module and the stirring module, and is used for primarily adjusting the rotating speed of the stirring motor when the stability of the sewage treatment process is judged to be lower than an allowable range according to the average suspended matter concentration of the sewage, or adjusting the stirring height of the stirring assembly to a corresponding height according to the thickness change rate of the sludge at the bottom of the tank, secondarily adjusting the rotating speed of the stirring motor according to the oxygen concentration of a vertical stirring area detected by the oxygen concentration sensor under a first condition, and adjusting the aeration amount to a corresponding aeration amount according to the fluctuation height of the surface of the sewage under a second condition; the first condition is that the central control module completes primary adjustment of the rotation speed of the stirring motor; the second condition is that the central control module completes the adjustment of the stirring height of the stirring assembly.
Further, the sedimentation tank further comprises:
the suspended matter concentration sensor is arranged on the side wall of the sedimentation tank and used for detecting the suspended matter concentration of sewage;
A visual sensor disposed above the suspended matter concentration sensor for detecting a fluctuating height of the sewage surface;
And the oxygen concentration sensor is arranged below the suspended matter concentration sensor and is used for detecting the oxygen concentration in the sewage.
Further, the central control module obtains the suspended matter concentration of a plurality of detection periods detected by the suspended matter concentration sensor to calculate the average suspended matter concentration of the sewage, and judges the stability of the sewage treatment process according to the average suspended matter concentration of the sewage,
The central control module judges that the stability of the sewage treatment process is within an allowable range under the condition of presetting a first concentration;
The central control module judges that the stability of the sewage treatment process exceeds an allowable range under the condition of presetting a second concentration, and primarily adjusts the rotating speed of the stirring motor;
The central control module judges that the stability of the sewage treatment process exceeds an allowable range under the condition of preset third concentration, primarily judges that the precipitation degree of pollutants is lower than the allowable range, and secondarily judges whether the precipitation degree of the pollutants is lower than the allowable range according to the thickness change rate of the sludge at the bottom of the tank;
The preset first concentration condition is that the average suspended matter concentration of the sewage is smaller than or equal to the preset first concentration; the preset second concentration condition is that the average suspended matter concentration of the sewage is larger than the preset first concentration and smaller than or equal to the preset second concentration; the preset third concentration condition is that the average suspended matter concentration of the sewage is larger than the preset second concentration; the preset first concentration is less than the preset second concentration;
wherein, the calculation formula of the average suspended matter concentration of the sewage is as follows:
，
Wherein R is the average suspended matter concentration of sewage, R n is the suspended matter concentration detected in the nth detection period, n is the total number of detection periods, and n is a natural number greater than or equal to 1.
Further, the rotation speed of the stirring motor after primary adjustment is determined by the difference value between the average suspended matter concentration of the sewage and the preset first concentration.
Further, the stirring module also comprises an ultrasonic sensor which is arranged above the telescopic component and used for detecting the thickness of the sludge at the bottom of the tank, the central control module calculates the thickness change rate of the sludge at the bottom of the tank according to the detection result of the ultrasonic sensor on the thickness of the sludge at the bottom of the tank in a single period under the preset third concentration condition, wherein,
The central control module secondarily judges that the precipitation degree of the pollutants is within an allowable range under the condition of a preset first rate;
The central control module secondarily judges that the precipitation degree of the pollutants is lower than the allowable range under the condition of a preset second rate, and adjusts the stirring height of the stirring assembly to a corresponding height by calculating the difference value of the thickness change rate of the sludge at the bottom of the tank and the preset rate;
the preset first rate condition is that the thickness change rate of the sludge at the bottom of the tank is smaller than or equal to a preset rate; the preset second rate condition is that the thickness change rate of the sludge at the bottom of the tank is larger than a preset rate;
the calculation formula of the thickness change rate of the sludge at the bottom of the tank is as follows:
，
Where V is the rate of change of the thickness of the bottom sludge, U X is the bottom sludge thickness at the end of a single cycle, U Y is the bottom sludge thickness at the beginning of a single cycle, and T is the duration of a single cycle.
Further, the corresponding height is determined by a difference between the thickness change rate of the bottom sludge and the preset rate.
Further, the central control module judges the stirring centrifugal degree according to the oxygen concentration of the vertical stirring area under the first condition, wherein,
The central control module judges that the stirring centrifugal degree exceeds the allowable range under the condition of presetting first oxygen concentration, and secondarily adjusts the rotating speed of the stirring motor;
The central control module judges that the stirring centrifugal degree is within an allowable range under the condition of presetting a second oxygen concentration;
The first preset oxygen concentration condition is that the oxygen concentration of the vertical stirring area is smaller than or equal to the preset oxygen concentration; the preset second oxygen concentration condition is that the oxygen concentration of the vertical stirring area is larger than the preset oxygen concentration.
Further, the rotation speed of the stirring motor after secondary adjustment is determined by the difference value between the oxygen concentration of the vertical stirring area and the preset oxygen concentration.
Further, the central control module judges the fusion degree of the ambient air and the sewage according to the fluctuation height of the sewage surface under the second condition, wherein,
The central control module judges that the fusion degree of the ambient air and the sewage is within an allowable range under the condition of presetting a first fluctuation height;
The central control module judges that the fusion degree of the ambient air and the sewage exceeds the allowable range under the condition of presetting a second fluctuation height, and adjusts the aeration quantity to the corresponding aeration quantity;
The first preset fluctuation height condition is that the fluctuation height of the sewage surface is smaller than or equal to the preset fluctuation height; the preset second fluctuation height condition is that the fluctuation height of the sewage surface is larger than the preset fluctuation height.
Further, the corresponding aeration quantity is determined by the difference value between the fluctuation height of the sewage surface and the preset fluctuation height.
Compared with the prior art, the system has the beneficial effects that by arranging the sedimentation tank, the aeration module, the stirring module and the central control module, the system can be used for primarily adjusting the rotating speed of the stirring motor when judging that the stability of the sewage treatment process is lower than an allowable range according to the average suspended matter concentration of the sewage, or adjusting the stirring height of the stirring assembly to a corresponding height according to the thickness change rate of the sludge at the bottom of the tank, so that the influence on the sewage treatment accuracy and stability due to inaccurate judgment on the sludge sedimentation degree reflected by the thickness change rate of the sludge at the bottom of the tank is reduced; the influence on the aeration supply amount due to inaccurate regulation of the rotation speed of the stirring motor is reduced by secondarily regulating the rotation speed of the stirring motor according to the oxygen concentration of the vertical stirring area detected by the oxygen concentration sensor; through adjusting the aeration quantity to corresponding aeration quantity according to the fluctuation height of the sewage surface, the influence of excessive energy consumption of an aeration module caused by inaccurate aeration quantity adjustment is reduced, and the stability of the sewage treatment process and the improvement of the sewage treatment accuracy are realized.
Further, the system of the invention judges whether the stability of the sewage treatment process is within the allowable range according to the average suspended matter concentration of the sewage through the preset first concentration and the preset second concentration, thereby reducing the influence on the sewage treatment process caused by inaccurate judgment of the stability of the sewage treatment process reflected by the average suspended matter concentration of the sewage, and further realizing the improvement of the stability of the sewage treatment process and the sewage treatment accuracy.
Furthermore, the system increases the rotation speed of the stirring motor according to the difference value between the average suspended matter concentration of the sewage and the preset first concentration through the preset first rotation speed adjustment coefficient and the preset second rotation speed adjustment coefficient, reduces the influence on the stability of sewage treatment caused by inaccurate adjustment of the rotation speed of the stirring motor, and further realizes the improvement of the stability of the sewage treatment process and the sewage treatment accuracy.
Furthermore, the system of the invention adjusts the stirring height of the stirring assembly according to the difference value of the thickness change rate and the preset rate of the sludge at the bottom of the tank through the preset first height adjustment coefficient and the preset second height adjustment coefficient, thereby reducing the influence on the sewage treatment accuracy caused by inaccurate adjustment of the stirring height of the stirring assembly, and further realizing the stability of the sewage treatment process and the improvement of the sewage treatment accuracy.
Further, according to the system, through the preset third rotating speed adjusting coefficient and the preset fourth rotating speed adjusting coefficient, the rotating speed of the stirring motor is secondarily adjusted according to the difference value between the oxygen concentration of the vertical stirring area and the preset oxygen concentration, the influence on accurate aeration caused by inaccurate secondary adjustment of the stirring motor is reduced, and the stability of the sewage treatment process and the improvement of the sewage treatment accuracy are further realized.
Furthermore, the system of the invention adjusts the aeration quantity according to the preset fluctuation height difference value, the preset first aeration quantity adjusting coefficient and the preset second aeration quantity adjusting coefficient, thereby reducing the influence on the energy control accuracy of the aeration module due to inaccurate aeration quantity adjustment and further realizing the improvement of the stability and the sewage treatment accuracy of the sewage treatment process.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a sewage treatment system based on intelligent control according to an embodiment of the invention;
FIG. 2 is a block diagram of the overall structure of a sewage treatment system based on intelligent control according to an embodiment of the present invention;
FIG. 3 is a block diagram showing a specific structure of a stirring module of the intelligent control-based sewage treatment system according to the embodiment of the invention;
fig. 4 is a block diagram of a connection structure of a stirring module and a central control module of the sewage treatment system based on intelligent control according to an embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, fig. 2, and fig. 3, the overall schematic diagram, the overall block diagram, the specific block diagram of the stirring module, and the connection block diagram of the stirring module and the central control module of the sewage treatment system based on intelligent control according to the embodiment of the invention are shown respectively; the invention discloses a sewage treatment system based on intelligent control, which comprises:
A sedimentation tank 12 for carrying out sedimentation degradation on pollutants in the sewage;
The aeration module is partially arranged above the sedimentation tank and comprises an aeration assembly and an aeration motor, wherein the aeration assembly is arranged on the side wall of the sedimentation tank and used for inputting air into sewage in the sedimentation tank, and the aeration motor is connected with the aeration assembly and used for providing operation power for the aeration assembly;
The stirring module is partially arranged above the sedimentation tank and comprises a stirring assembly used for stirring sewage and a telescopic assembly partially arranged above the stirring assembly and used for changing the stirring height of the stirring assembly, and the stirring assembly comprises a stirring motor 4;
the central control module is respectively connected with the sedimentation tank, the aeration module and the stirring module and is used for initially adjusting the rotating speed of the stirring motor when the stability of the sewage treatment process is judged to be lower than an allowable range according to the average suspended matter concentration of the sewage, or adjusting the stirring height of the stirring assembly to a corresponding height according to the thickness change rate of the sludge at the bottom of the tank,
And, secondarily adjusting the rotation speed of the stirring motor according to the oxygen concentration of the vertical stirring area detected by the oxygen concentration sensor 10 under the first condition, and adjusting the aeration amount to a corresponding aeration amount according to the fluctuation height of the sewage surface under the second condition;
The first condition is that the central control module completes primary adjustment of the rotation speed of the stirring motor; the second condition is that the central control module completes the adjustment of the stirring height of the stirring assembly.
Specifically, the telescopic assembly 3 is an electric telescopic rod.
Specifically, the stirring assembly includes:
a stirring shaft 9 connected to the stirring motor 4 for transmitting a rotation moment;
and a stirring blade 8 connected with the stirring shaft 9 and used for stirring sewage.
In particular, the aeration assembly comprises an aeration pipe 6 connected to the aeration motor 5 for delivering air and an aeration element 7 connected to the aeration pipe 6 for delivering air into the water.
In particular, it will be appreciated by those skilled in the art that the aeration element 7 may be an aeration structure consisting of a plurality of aeration heads.
According to the system, the sedimentation tank, the aeration module, the stirring module and the central control module are arranged, and the stirring motor rotation speed is primarily adjusted when the stability of the sewage treatment process is judged to be lower than the allowable range according to the average suspended matter concentration of the sewage, or the stirring height of the stirring assembly is adjusted to be corresponding to the thickness change rate of the sludge at the bottom of the tank, so that the influence on sewage treatment accuracy and stability due to inaccurate judgment on the sludge sedimentation degree reflected by the thickness change rate of the sludge at the bottom of the tank is reduced; by secondarily adjusting the rotation speed of the stirring motor according to the oxygen concentration of the vertical stirring area detected by the oxygen concentration sensor 10, the influence on the aeration supply amount due to inaccurate adjustment of the rotation speed of the stirring motor is reduced; through adjusting the aeration quantity to corresponding aeration quantity according to the fluctuation height of the sewage surface, the influence of excessive energy consumption of an aeration module caused by inaccurate aeration quantity adjustment is reduced, and the stability of the sewage treatment process and the improvement of the sewage treatment accuracy are realized.
Specifically, the sedimentation tank further comprises:
A suspended matter concentration sensor 11 provided on a side wall of the sedimentation tank for detecting suspended matter concentration of the sewage;
A vision sensor 1 disposed above the suspended matter concentration sensor 11 for detecting a fluctuation height of the sewage surface;
An oxygen concentration sensor 10 provided below the suspended matter concentration sensor 11 for detecting the oxygen concentration in the sewage.
Specifically, the central control module acquires the suspended matter concentration of several detection periods detected by the suspended matter concentration sensor 11 to calculate the average suspended matter concentration of the sewage, and determines the stability of the sewage treatment process according to the average suspended matter concentration of the sewage, wherein,
The central control module judges that the stability of the sewage treatment process is within an allowable range under the condition of presetting a first concentration;
The central control module judges that the stability of the sewage treatment process exceeds an allowable range under the condition of presetting a second concentration, and primarily adjusts the rotating speed of the stirring motor;
The central control module judges that the stability of the sewage treatment process exceeds an allowable range under the condition of preset third concentration, primarily judges that the precipitation degree of pollutants is lower than the allowable range, and secondarily judges whether the precipitation degree of the pollutants is lower than the allowable range according to the thickness change rate of the sludge at the bottom of the tank;
The preset first concentration condition is that the average suspended matter concentration of the sewage is smaller than or equal to the preset first concentration; the preset second concentration condition is that the average suspended matter concentration of the sewage is larger than the preset first concentration and smaller than or equal to the preset second concentration; the preset third concentration condition is that the average suspended matter concentration of the sewage is larger than the preset second concentration; the preset first concentration is less than the preset second concentration;
wherein, the calculation formula of the average suspended matter concentration of the sewage is as follows:
，
Wherein R is the average suspended matter concentration of sewage, R n is the suspended matter concentration detected in the nth detection period, n is the total number of detection periods, and n is a natural number greater than or equal to 1.
According to the system, the preset first concentration and the preset second concentration are set, and whether the stability of the sewage treatment process is within the allowable range or not is judged according to the average suspended matter concentration of the sewage, so that the influence on the sewage treatment process caused by inaccurate stability judgment of the sewage treatment process reflected by the average suspended matter concentration of the sewage is reduced, and the stability of the sewage treatment process and the sewage treatment accuracy are further improved.
Specifically, the preferred embodiment of the preset first concentration is denoted as R1, the preferred embodiment of the preset second concentration is denoted as R2, the preferred embodiment of the R2 is denoted as 42mg/L, wherein R1 < R2, the difference between the average suspended matter concentration of the sewage and the preset first concentration is denoted as Δr, Δr=r—r1 is set.
Specifically, the rotation speed of the stirring motor after the primary adjustment is determined by the difference between the average suspended matter concentration of the sewage and the preset first concentration.
Specifically, the process of primarily adjusting the rotation speed of the stirring motor includes: the central control module adjusts the rotation speed of the stirring motor to a first rotation speed by using a preset first rotation speed adjustment coefficient under the condition of a preset first concentration difference value;
The central control module uses a preset second rotating speed adjusting coefficient to adjust the rotating speed of the stirring motor to a second rotating speed under the condition of a preset second concentration difference value;
The preset first concentration difference condition is that the difference value between the average suspended matter concentration of the sewage and the preset first concentration is smaller than or equal to the preset concentration difference value; the preset second concentration difference condition is that the difference between the average suspended matter concentration of the sewage and the preset first concentration is larger than the preset concentration difference; the preset first rotation speed adjustment coefficient is smaller than the preset second rotation speed adjustment coefficient.
Specifically, the preset concentration difference is denoted as Δr0, the preferred embodiment of Δr0 is 10mg/L, the preset first rotational speed adjustment coefficient is denoted as α1, the preferred embodiment of α1 is 1.1, the preset second rotational speed adjustment coefficient is denoted as α2, the preferred embodiment of α2 is 1.2, the stirring motor rotational speed is denoted as P, wherein 1 < α1 < α2, the adjusted stirring motor rotational speed is denoted as P ', P' =p× (1+αj)/2 is set, wherein αj is the preset j-th rotational speed adjustment coefficient, and j=1, 2 is set.
In implementation, the system increases the rotation speed of the stirring motor according to the difference value between the average suspended matter concentration of the sewage and the preset first concentration through the preset first rotation speed adjustment coefficient and the preset second rotation speed adjustment coefficient, reduces the influence on the stability of sewage treatment caused by inaccurate adjustment of the rotation speed of the stirring motor, and further realizes the improvement of the stability of the sewage treatment process and the sewage treatment accuracy.
Specifically, the stirring module further comprises an ultrasonic sensor 2 arranged above the telescopic component and used for detecting the thickness of the sludge at the bottom of the tank, the central control module calculates the thickness change rate of the sludge at the bottom of the tank according to the detection result of the ultrasonic sensor 2 on the thickness of the sludge at the bottom of the tank in a single period under the preset third concentration condition, wherein,
The central control module secondarily judges that the precipitation degree of the pollutants is within an allowable range under the condition of a preset first rate;
The central control module secondarily judges that the precipitation degree of the pollutants is lower than the allowable range under the condition of a preset second rate, and adjusts the stirring height of the stirring assembly to a corresponding height by calculating the difference value of the thickness change rate of the sludge at the bottom of the tank and the preset rate;
the preset first rate condition is that the thickness change rate of the sludge at the bottom of the tank is smaller than or equal to a preset rate; the preset second rate condition is that the thickness change rate of the sludge at the bottom of the tank is larger than a preset rate;
the calculation formula of the thickness change rate of the sludge at the bottom of the tank is as follows:
，
Where V is the rate of change of the thickness of the bottom sludge, U X is the bottom sludge thickness at the end of a single cycle, U Y is the bottom sludge thickness at the beginning of a single cycle, and T is the duration of a single cycle.
Specifically, the preset rate is denoted as V0, a preferred embodiment of V0 is 8cm/h, the difference in the preset rate of thickness change rate of the bottom sludge is denoted as Δv, and Δv=v-V0 is set.
Specifically, the corresponding height is determined by the difference between the thickness change rate of the bottom sludge and the preset rate.
Specifically, the process of adjusting the stirring height of the stirring assembly to a corresponding height includes: the central control module adjusts the stirring height of the stirring assembly to a first height by using a preset first height adjustment coefficient under the condition of a preset first rate difference value;
The central control module adjusts the stirring height of the stirring assembly to a second height by using a preset second height adjustment coefficient under the condition of a preset second rate difference value;
The preset first rate difference condition is that the difference value between the thickness change rate of the sludge at the bottom of the tank and the preset rate is smaller than or equal to the preset rate difference value; the preset second rate difference condition is that the difference between the thickness change rate of the sludge at the bottom of the tank and the preset rate is larger than the preset rate difference; the preset first height adjustment coefficient is smaller than the preset second height adjustment coefficient;
specifically, the corresponding heights include a first height and a second height.
Specifically, the preset rate difference is denoted as Δv0, the preferred embodiment of Δv0 is 3cm/H, the preset first height adjustment coefficient is denoted as β1, the preferred embodiment of β1 is 1.22, the preset second height adjustment coefficient is denoted as β2, the preferred embodiment of β2 is 1.35, wherein 1 < β1 < β2, the stirring height of the stirring assembly is denoted as H, the stirring height of the stirring assembly after adjustment is denoted as H ', H' =hxβk is set, wherein βk is the preset kth height adjustment coefficient, and k=1, 2 is set.
In implementation, the system of the invention adjusts the stirring height of the stirring assembly according to the difference value of the thickness change rate and the preset rate of the sludge at the bottom of the tank through the preset first height adjustment coefficient and the preset second height adjustment coefficient, thereby reducing the influence on the sewage treatment accuracy caused by inaccurate adjustment of the stirring height of the stirring assembly, and further realizing the improvement of the stability of the sewage treatment process and the sewage treatment accuracy.
In particular, the central control module determines the stirring centrifugal degree according to the oxygen concentration of the vertical stirring area under the first condition, wherein,
The central control module judges that the stirring centrifugal degree exceeds the allowable range under the condition of presetting first oxygen concentration, and secondarily adjusts the rotating speed of the stirring motor;
The central control module judges that the stirring centrifugal degree is within an allowable range under the condition of presetting a second oxygen concentration;
The first preset oxygen concentration condition is that the oxygen concentration of the vertical stirring area is smaller than or equal to the preset oxygen concentration; the preset second oxygen concentration condition is that the oxygen concentration of the vertical stirring area is larger than the preset oxygen concentration.
Specifically, the oxygen concentration in the vertical agitation area is denoted as W, the preset oxygen concentration is denoted as W0, the preferred embodiment of W0 is 3mg/L, the difference between the preset oxygen concentration and the oxygen concentration in the vertical agitation area is denoted as Δw, and Δw=w0-W is set.
Specifically, the rotation speed of the stirring motor after secondary adjustment is determined by the difference value between the oxygen concentration of the vertical stirring area and the preset oxygen concentration.
Specifically, the process of secondarily adjusting the rotation speed of the stirring motor includes:
The central control module secondarily adjusts the rotation speed of the stirring motor to a third rotation speed by using a preset fourth rotation speed adjusting coefficient under the condition of presetting a first oxygen concentration difference value;
The central control module secondarily adjusts the rotation speed of the stirring motor to a fourth rotation speed by using a preset third rotation speed adjusting coefficient under the condition of presetting a second oxygen concentration difference value;
The preset first oxygen concentration difference condition is that the difference value between the oxygen concentration of the vertical stirring area and the preset oxygen concentration is smaller than or equal to the preset oxygen concentration difference value; the preset second oxygen concentration difference condition is that the difference between the oxygen concentration of the vertical stirring area and the preset oxygen concentration is larger than the preset oxygen concentration difference; the preset third rotational speed adjustment coefficient is smaller than the preset fourth rotational speed adjustment coefficient.
Specifically, the preset oxygen concentration difference is denoted as Δw0, the preferred embodiment of Δw0 is 0.6mg/L, the preferred embodiment of preset third rotation speed adjustment coefficient is denoted as α3, the preferred embodiment of α3 is 0.85, the preferred embodiment of preset fourth rotation speed adjustment coefficient is denoted as α4, α4 is 0.92, wherein 0 < α3 < α4 <1, the secondarily adjusted rotation speed of the stirring motor is denoted as P "=p' × (1+αg)/2, wherein αg is the preset g-th rotation speed adjustment coefficient, and g=3, 4 is set.
In implementation, the system of the invention reduces the influence on accurate aeration caused by inaccurate secondary regulation of the stirring motor 4 by setting the preset third rotating speed regulating coefficient and the preset fourth rotating speed regulating coefficient and secondarily regulating the rotating speed of the stirring motor according to the difference value between the oxygen concentration of the vertical stirring area and the preset oxygen concentration, thereby further realizing the improvement of the stability of the sewage treatment process and the sewage treatment accuracy.
Specifically, the central control module judges the fusion degree of the ambient air and the sewage according to the fluctuation height of the sewage surface under the second condition, wherein,
The central control module judges that the fusion degree of the ambient air and the sewage is within an allowable range under the condition of presetting a first fluctuation height;
The central control module judges that the fusion degree of the ambient air and the sewage exceeds the allowable range under the condition of presetting a second fluctuation height, and adjusts the aeration quantity to the corresponding aeration quantity;
The first preset fluctuation height condition is that the fluctuation height of the sewage surface is smaller than or equal to the preset fluctuation height; the preset second fluctuation height condition is that the fluctuation height of the sewage surface is larger than the preset fluctuation height.
Specifically, the fluctuation height of the sewage surface is denoted as E, the preset fluctuation height is denoted as E0, the preferred embodiment of E0 is 0.3m, the difference between the fluctuation height of the sewage surface and the preset fluctuation height is denoted as Δe, and Δe=e-E0 is set.
Specifically, the corresponding aeration quantity is determined by the difference between the fluctuation height of the sewage surface and the preset fluctuation height.
Specifically, the process of adjusting the aeration amount to the corresponding aeration amount includes:
The central control module uses a preset second aeration quantity adjusting coefficient to adjust the aeration quantity to a first aeration quantity under the condition of a preset first fluctuation height difference value;
The central control module uses a preset first aeration quantity adjusting coefficient to adjust the aeration quantity to a second aeration quantity under the condition of presetting a second fluctuation height difference value;
the preset first fluctuation height difference condition is that the difference value between the fluctuation height of the sewage surface and the preset fluctuation height is smaller than or equal to the preset fluctuation height difference value; the preset second fluctuation height difference condition is that the difference between the fluctuation height of the sewage surface and the preset fluctuation height is larger than the preset fluctuation height difference; the preset first aeration quantity adjusting coefficient is smaller than the preset second aeration quantity adjusting coefficient.
Specifically, the preset fluctuation height difference is denoted as Δe0, the preferred embodiment of Δe0 is 0.08m, the preset first aeration amount adjustment coefficient is denoted as γ1, the preferred embodiment of γ1 is 0.8, the preset second aeration amount adjustment coefficient is denoted as γ2, the preferred embodiment of γ2 is 0.9, wherein 0 < γ1 < γ2 < 1, the aeration amount is denoted as D, the adjusted aeration amount is denoted as D ', D' =d× (1+2γb)/3 is set, wherein γb is the preset b-th aeration amount adjustment coefficient, and b=1, 2 is set.
In implementation, the system of the invention adjusts the aeration quantity according to the preset fluctuation height difference value, the preset first aeration quantity adjusting coefficient and the preset second aeration quantity adjusting coefficient, thereby reducing the influence on the energy control accuracy of the aeration module due to inaccurate aeration quantity adjustment and further realizing the improvement of the stability and the sewage treatment accuracy of the sewage treatment process.
Example 1
In this embodiment, the central control module performs primary adjustment on the rotation speed of the stirring motor according to the difference between the average suspended matter concentration of the sewage and the preset first concentration under the preset second concentration condition, the preset concentration difference is denoted as Δr0, the preset first rotation speed adjustment coefficient is denoted as α1, the preset second rotation speed adjustment coefficient is denoted as α2, the rotation speed of the stirring motor is denoted as P, wherein α1=1.1, α2=1.2, Δr0=10mg/L, and p=1000r/min,
In this embodiment 1, Δr=15 mg/L is obtained, the central control module determines Δr > - Δr0 and uses a preset second rotation speed adjustment coefficient α2 to perform primary adjustment on the rotation speed of the stirring motor and obtain P ', so as to calculate P' =1000r/min× (1+1.2)/2=1100r/min.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.

Claims (10)

1. Sewage treatment system based on intelligent control, characterized by comprising:
the sedimentation tank is used for carrying out sedimentation degradation on pollutants in sewage;
The aeration module is partially arranged above the sedimentation tank and comprises an aeration assembly and an aeration motor, wherein the aeration assembly is arranged on the side wall of the sedimentation tank and used for inputting air into sewage in the sedimentation tank, and the aeration motor is connected with the aeration assembly and used for providing operation power for the aeration assembly;
the stirring module is partially arranged above the sedimentation tank and comprises a stirring assembly for stirring sewage and a telescopic assembly which is partially arranged above the stirring assembly and used for changing the stirring height of the stirring assembly, and the stirring assembly comprises a stirring motor;
the central control module is respectively connected with the sedimentation tank, the aeration module and the stirring module and is used for initially adjusting the rotating speed of the stirring motor when the stability of the sewage treatment process is judged to be lower than an allowable range according to the average suspended matter concentration of the sewage, or adjusting the stirring height of the stirring assembly to a corresponding height according to the thickness change rate of the sludge at the bottom of the tank,
The rotating speed of the stirring motor is secondarily adjusted according to the oxygen concentration of the vertical stirring area detected by the oxygen concentration sensor under the first condition, and the aeration quantity is adjusted to the corresponding aeration quantity according to the fluctuation height of the sewage surface under the second condition;
The first condition is that the central control module completes primary adjustment of the rotation speed of the stirring motor; the second condition is that the central control module completes the adjustment of the stirring height of the stirring assembly.
2. The intelligent control-based wastewater treatment system of claim 1, wherein the sedimentation tank further comprises:
the suspended matter concentration sensor is arranged on the side wall of the sedimentation tank and used for detecting the suspended matter concentration of sewage;
A visual sensor disposed above the suspended matter concentration sensor for detecting a fluctuating height of the sewage surface;
And the oxygen concentration sensor is arranged below the suspended matter concentration sensor and is used for detecting the oxygen concentration in the sewage.
3. The intelligent control-based wastewater treatment system of claim 2, wherein the central control module obtains the suspended matter concentration of the plurality of detection cycles detected by the suspended matter concentration sensor to calculate an average suspended matter concentration of the wastewater and determines the stability of the wastewater treatment process based on the average suspended matter concentration of the wastewater, wherein,
The central control module judges that the stability of the sewage treatment process is within an allowable range under the condition of presetting a first concentration;
The central control module judges that the stability of the sewage treatment process exceeds an allowable range under the condition of presetting a second concentration, and primarily adjusts the rotating speed of the stirring motor;
The central control module judges that the stability of the sewage treatment process exceeds an allowable range under the condition of preset third concentration, primarily judges that the precipitation degree of pollutants is lower than the allowable range, and secondarily judges whether the precipitation degree of the pollutants is lower than the allowable range according to the thickness change rate of the sludge at the bottom of the tank;
The preset first concentration condition is that the average suspended matter concentration of the sewage is smaller than or equal to the preset first concentration; the preset second concentration condition is that the average suspended matter concentration of the sewage is larger than the preset first concentration and smaller than or equal to the preset second concentration; the preset third concentration condition is that the average suspended matter concentration of the sewage is larger than the preset second concentration; the preset first concentration is less than the preset second concentration;
wherein, the calculation formula of the average suspended matter concentration of the sewage is as follows:
，
Wherein R is the average suspended matter concentration of sewage, R n is the suspended matter concentration detected in the nth detection period, n is the total number of detection periods, and n is a natural number greater than or equal to 1.
4. The intelligent control-based sewage treatment system according to claim 3, wherein the rotation speed of the stirring motor after the initial adjustment is determined by a difference between the average suspended matter concentration of the sewage and the preset first concentration.
5. The intelligent control-based sewage treatment system according to claim 4, wherein the stirring module further comprises an ultrasonic sensor disposed above the telescopic assembly for detecting the thickness of the bottom sludge, the central control module calculates the thickness change rate of the bottom sludge according to the detection result of the ultrasonic sensor on the thickness of the bottom sludge of a single cycle under the preset third concentration condition, wherein,
The central control module secondarily judges that the precipitation degree of the pollutants is within an allowable range under the condition of a preset first rate;
The central control module secondarily judges that the precipitation degree of the pollutants is lower than the allowable range under the condition of a preset second rate, and adjusts the stirring height of the stirring assembly to a corresponding height by calculating the difference value of the thickness change rate of the sludge at the bottom of the tank and the preset rate;
the preset first rate condition is that the thickness change rate of the sludge at the bottom of the tank is smaller than or equal to a preset rate; the preset second rate condition is that the thickness change rate of the sludge at the bottom of the tank is larger than a preset rate;
the calculation formula of the thickness change rate of the sludge at the bottom of the tank is as follows:
，
Where V is the rate of change of the thickness of the bottom sludge, U X is the bottom sludge thickness at the end of a single cycle, U Y is the bottom sludge thickness at the beginning of a single cycle, and T is the duration of a single cycle.
6. The intelligent control-based sewage treatment system according to claim 5, wherein the corresponding height is determined by a difference between a thickness change rate of the bottom sludge and the preset rate.
7. The intelligent control-based sewage treatment system according to claim 6, wherein the central control module determines a stirring centrifugal degree according to an oxygen concentration of the vertical stirring region under the first condition, wherein,
The central control module judges that the stirring centrifugal degree exceeds the allowable range under the condition of presetting first oxygen concentration, and secondarily adjusts the rotating speed of the stirring motor;
The central control module judges that the stirring centrifugal degree is within an allowable range under the condition of presetting a second oxygen concentration;
The first preset oxygen concentration condition is that the oxygen concentration of the vertical stirring area is smaller than or equal to the preset oxygen concentration; the preset second oxygen concentration condition is that the oxygen concentration of the vertical stirring area is larger than the preset oxygen concentration.
8. The intelligent control-based sewage treatment system according to claim 7, wherein the secondary-adjusted rotation speed of the stirring motor is determined by a difference between the oxygen concentration of the vertical stirring area and the preset oxygen concentration.
9. The intelligent control-based wastewater treatment system of claim 8, wherein the central control module determines a degree of fusion of ambient air with wastewater based on a fluctuating height of the wastewater surface under the second condition, wherein,
The central control module judges that the fusion degree of the ambient air and the sewage is within an allowable range under the condition of presetting a first fluctuation height;
The central control module judges that the fusion degree of the ambient air and the sewage exceeds the allowable range under the condition of presetting a second fluctuation height, and adjusts the aeration quantity to the corresponding aeration quantity;
The first preset fluctuation height condition is that the fluctuation height of the sewage surface is smaller than or equal to the preset fluctuation height; the preset second fluctuation height condition is that the fluctuation height of the sewage surface is larger than the preset fluctuation height.
10. The intelligent control-based sewage treatment system according to claim 9, wherein the corresponding aeration quantity is determined by a difference between a fluctuation height of the sewage surface and the preset fluctuation height.
CN202410606903.8A 2024-05-16 2024-05-16 Sewage treatment system based on intelligent control Active CN118162035B (en)

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