CN117463237A - Coagulation stirring control method and device, stirrer controller and storage medium - Google Patents

Coagulation stirring control method and device, stirrer controller and storage medium Download PDF

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CN117463237A
CN117463237A CN202311811517.4A CN202311811517A CN117463237A CN 117463237 A CN117463237 A CN 117463237A CN 202311811517 A CN202311811517 A CN 202311811517A CN 117463237 A CN117463237 A CN 117463237A
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coagulation
stirrer
speed gradient
stirring
mixing tank
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CN117463237B (en
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张自力
王建伟
王博
何志军
张娟
李林栋
刘思宇
王松
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Cangzhou Water Supply And Drainage Group Co ltd
Hebei Xiong'an Ruitian Technology Co ltd
Hebei Construction & Investment Water Investment Co ltd
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Cangzhou Water Supply And Drainage Group Co ltd
Hebei Xiong'an Ruitian Technology Co ltd
Hebei Construction & Investment Water Investment Co ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • 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
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2115—Temperature
    • 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
    • B01F35/212—Measuring of the driving system data, e.g. torque, speed or power data
    • 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
    • B01F35/2136—Viscosity
    • 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
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5209—Regulation methods for flocculation or precipitation
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5281—Installations for water purification using chemical agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/305—Treatment of water, waste water or sewage

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  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • General Physics & Mathematics (AREA)
  • Hydrology & Water Resources (AREA)
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  • Water Supply & Treatment (AREA)
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  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

The disclosure provides a coagulation stirring control method and device, a stirrer controller and a storage medium, wherein the method comprises the following steps: acquiring a plurality of speed gradient values corresponding to the coagulation reaction tank; respectively calculating a plurality of stirring parameters corresponding to the plurality of speed gradient values based on a pre-established relational expression; determining a target speed gradient value from the plurality of speed gradient values according to coagulation parameters corresponding to the plurality of stirring parameters; and carrying out coagulation stirring control on the coagulation reaction tank based on the target speed gradient value. The coagulation and stirring control method and device, the stirrer controller and the storage medium can improve the effect of mixing and flocculation in the water treatment process.

Description

Coagulation stirring control method and device, stirrer controller and storage medium
Technical Field
The present disclosure relates to an automatic control technology field, and more particularly, to a method and an apparatus for controlling coagulation and stirring, a stirrer controller, and a storage medium.
Background
The coagulation is to add the chemical agent into water, to disperse the chemical agent into the wastewater evenly by rapid mixing, and then to mix slowly to form large precipitable flocs. The process of destabilizing the colloidal particles to collide with each other to form particles is called "flocculation" and the "flocculation" process has been called "reaction" in the past. Mixing, coagulation and flocculation are collectively called coagulation, and larger flocs generated by coagulation are separated from water by subsequent precipitation or clarification, air floatation and the like.
The chemical adding mixed flocculation is taken as an important link of the water supply treatment process, the overall water treatment effect is directly affected, and at present, mechanical coagulation stirring process equipment adopted by chemical adding in a water plant generally adopts fixed stirring parameters to operate in actual operation, so that the optimal coagulation effect is difficult to achieve.
Disclosure of Invention
The invention aims to provide a coagulation stirring control method and device, a stirrer controller and a storage medium so as to improve the effect of mixing flocculation in the water treatment process.
In a first aspect of an embodiment of the present disclosure, there is provided a coagulation stirring control method, including:
acquiring a plurality of speed gradient values corresponding to the coagulation reaction tank;
respectively calculating a plurality of stirring parameters corresponding to the plurality of speed gradient values based on a pre-established relational expression;
determining a target speed gradient value from the plurality of speed gradient values according to coagulation parameters corresponding to the plurality of stirring parameters;
and carrying out coagulation stirring control on the coagulation reaction tank based on the target speed gradient value.
In a second aspect of the embodiments of the present disclosure, there is provided a coagulation agitation control apparatus including:
the acquisition unit is used for acquiring a plurality of speed gradient values corresponding to the coagulation reaction tank;
a calculating unit, configured to calculate a plurality of stirring parameters corresponding to the plurality of velocity gradient values based on a pre-constructed relational expression, respectively;
the processing unit is used for determining a target speed gradient value from the plurality of speed gradient values according to coagulation parameters corresponding to the plurality of stirring parameters;
and the output unit is used for carrying out coagulation stirring control on the coagulation reaction tank based on the target speed gradient value.
In a third aspect of the disclosed embodiments, there is provided a mixer controller comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the steps of the above-described coagulation and mixing control method being implemented when the processor executes the computer program.
In a fourth aspect of the disclosed embodiments, there is provided a computer storage medium storing a computer program which, when executed by a processor, implements the steps of the coagulation agitation control method described above.
The coagulation and stirring control method and device, the stirrer controller and the storage medium provided by the embodiment of the disclosure have the beneficial effects that:
according to the embodiment of the disclosure, on the basis of establishing the operation relation between the speed gradient value and the stirring parameter, a plurality of coagulation parameters are obtained by adjusting the speed gradient value and the corresponding stirring parameter for a plurality of times. The coagulation parameters can be used for representing the coagulation effect, a group of speed gradient values with the best coagulation effect and corresponding stirring parameters thereof are selected according to the coagulation parameters obtained by multiple adjustment operations and are respectively used as the target speed gradient values and the stirring parameters corresponding to the target speed gradient values, and the coagulation reaction tank is controlled to operate according to the target speed gradient values and the stirring parameters corresponding to the target speed gradient values, so that the coagulation effect is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are required for the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic flow chart of a method for controlling coagulation stirring according to an embodiment of the disclosure;
FIG. 2 is a block diagram of a coagulation and stirring control device according to an embodiment of the present disclosure;
fig. 3 is a schematic block diagram of a blender controller provided by an embodiment of the present disclosure.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the disclosed embodiments. However, it will be apparent to one skilled in the art that the present disclosure may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present disclosure with unnecessary detail.
For the purposes of promoting an understanding of the principles and advantages of the disclosure, reference will now be made to the embodiments illustrated in the drawings.
Referring to fig. 1, fig. 1 is a flow chart of a method for controlling coagulation stirring according to an embodiment of the disclosure, where the method includes:
s101: and obtaining a plurality of speed gradient values corresponding to the coagulation reaction tank.
In the embodiment of the disclosure, the speed gradient value is a hydraulic condition for controlling the coagulation effect of the coagulation reaction tank, so the speed gradient value is taken as an important control parameter. A plurality of velocity gradient values may be selected from velocity gradient values commonly used in the past.
S102: and respectively calculating a plurality of stirring parameters corresponding to the plurality of velocity gradient values based on a pre-established relational expression.
In the embodiment of the disclosure, the stirring parameters corresponding to the speed gradient values can be obtained by constructing the relational expression between the speed gradient values and the stirring parameters in advance, so that the operation of the stirrer is controlled, and the hydraulic conditions of the coagulation reaction tank reach the corresponding speed gradient values.
S103: and determining a target speed gradient value from the plurality of speed gradient values according to the coagulation parameters corresponding to the plurality of stirring parameters.
In the disclosed embodiments, operation of the mixer according to different mixing parameters may result in different coagulation effects, which are characterized by the coagulation parameters. And selecting the stirring parameter with the best coagulation effect, and taking the corresponding speed gradient value as the target speed gradient value.
S104: and performing coagulation stirring control on the coagulation reaction tank based on the target speed gradient value.
In the embodiment of the disclosure, the stirring parameters of the stirrer are controlled according to the target speed gradient value, so that the optimal coagulation effect can be achieved.
It can be derived from the above that, according to the embodiment of the disclosure, on the basis of establishing the operation relationship between the speed gradient value and the stirring parameter, a plurality of coagulation parameters are obtained by adjusting the speed gradient value and the stirring parameter corresponding thereto for a plurality of times. The coagulation parameters can be used for representing the coagulation effect, a group of speed gradient values with the best coagulation effect and corresponding stirring parameters thereof are selected according to the coagulation parameters obtained by multiple adjustment operations and are respectively used as the target speed gradient values and the stirring parameters corresponding to the target speed gradient values, and the coagulation reaction tank is controlled to operate according to the target speed gradient values and the stirring parameters corresponding to the target speed gradient values, so that the coagulation effect is improved.
In one embodiment of the present disclosure, the stirring parameter is the stirrer revolution number, and the pre-established relationship is:
wherein,for the speed gradient reference value, +.>For the stirrer reference revolutions>Represents any velocity gradient value, and n is the stirrer revolution number obtained according to any velocity gradient value.
In the embodiment of the disclosure, a relational expression between a speed gradient value and the rotation number of the stirrer is obtained by analyzing the relation between each operation parameter of the coagulation reaction tank. Wherein the coagulation reaction tank can be a mixing tank or a flocculation tank, and for convenience of expression, the stirrer is used for rotating speed in the mixing tankIndicating +.>Representing velocity gradient valuesIndicating the speed gradient reference value +.>A representation; stirrer revolution in flocculation basin>Use->The reference number of revolutions of the stirrer is indicated, the speed gradient value is +.>Indicating the speed gradient reference value +.>And (3) representing.
The specific derivation of the relation between the speed gradient value and the stirrer revolution number is as follows:
first, for the mixing tank:
(1) According to Newton's internal friction law, calculating a velocity gradient value to obtain:
wherein:represents the dynamic viscosity of water in pa.s; />Represents the power consumed by a unit volume of water body, and the unit is W/m 3 。
(2) And calculating the mixed power to obtain:
wherein:representing the mixing power, i.e. the total power dissipated when the stirrer rotates, in kW; />Represents the volume of water, unit m 3 ；/>Indicating the flow of the mixing tank, +.>The method comprises the steps of carrying out a first treatment on the surface of the t represents mixing time, unit s; />The dynamic viscosity of water is expressed in pa.s.
(3) Calculating stirring power of a stirrer to obtain:
wherein:representing the resistance coefficient>0.2/>0.5；/>Represents the density of water>；Indicating the rotational angular velocity of the stirrer, < >>The method comprises the steps of carrying out a first treatment on the surface of the Z represents the number of stirrer paddles (sheets); e represents the number of layers of the stirrer; b represents the stirrer paddle width (m); r represents the stirrer paddle radius (m); g represents the acceleration of gravity, 9.18 +.>；/>Represents the pulp sheet angle (°).
(4) In order to fully utilize the stirring power N, the requirements are satisfiedThus, there is obtained:
(5) According toCalculate->The method comprises the following steps:
to sum up, the relation between the speed gradient value in the mixing tank and the stirrer revolution is obtained:
。
second, for flocculation tanks:
(1) Calculating the total power P dissipated when the stirrer rotates, and obtaining the following steps:
=/>
wherein: p represents the total power dissipated by the stirrer as it rotates, in W;represents the power consumed by a unit volume of water body, and the unit is W/m 3 ；/>Represents the dynamic viscosity of water in pa.s; v->Represents the volume of water, unit m 3 。
(2) Calculating the rotation angular velocity of the stirrer according to the total power P to obtain:
=/>
wherein:representing the rotational angular velocity of the stirrer, rad/s; p represents the total power dissipated when the stirrer rotates, W; m represents the number of paddles on the same radius of rotation; />Represents the flow resistance coefficient, when the width and length ratio of the pulp sheet is less than 1, the ∈10 is taken>=1.10；/>Indicating the density of water, kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the k represents the number of different turning radii of the installation paddle; />Represents the inner edge rotation radius of the pulp sheet, and the unit is m, i=1, 2 … k; />The outer edge rotation radius of the slurry plate is represented by m; l represents the pulp sheet length, m.
(3) According toCalculate->The method comprises the following steps:
to sum up, the relation between the speed gradient value in the flocculation basin and the stirrer revolution is obtained:
represented by nOr->，/>Represents->Or->，/>Represents->Or->，/>Represents->Or->Obtaining a relational expression between the speed gradient value of the coagulation reaction tank and the revolution number of the stirrer:
。
in one embodiment of the present disclosure, the coagulation agitation control method further includes: according to the current water temperature T, byCorrecting the revolution of the stirrer; wherein (1)>Dynamic viscosity of water in coagulation reaction tank under reference water temperature condition +.>Is the correction value for the stirrer revolution n.
In the embodiment of the disclosure, the change of the water temperature can influence the dynamic viscosity of water, and further influence the speed gradient value of the mixing tank and the flocculation tank. The correspondence of water temperature and dynamic viscosity is disclosed in table 1.
Fitting the data in Table 1 gives the water temperature and dynamic viscosity relationship:
wherein:represents the dynamic viscosity of water, mPa.s; />Water temperature, c is indicated.
Setting a reference water temperature T 0 Angular speed of stirrerCorresponding stirrer revolution n 0 Velocity gradient value G 0 Dynamic adhesion of waterDegree->，/>As the water temperature changes, in order to fully utilize the stirring power, when the water temperature is changed from the reference water temperature T 0 Change to->When water has a dynamic viscosity of +.>Change to->Stirrer angular speed->Should be changed in real time to meet the requirements:
and then the relation between the rotation number of the stirrer and the water temperature is obtained:
thereby obtaining the current water temperatureCorrection value of the number n of revolutions of the lower stirrer:
in one embodiment of the present disclosure, the coagulation reaction tank is a mixing tank, and the method for calculating the reference revolution of the stirrer includes:
by passing throughCalculating the mixing power of the mixing tank>. Wherein (1)>，/>A speed gradient reference value representing the mixing tank, +.>=/>，/>Represents the dynamic viscosity of the water in the mixing tank under the condition of the reference water temperature,/->The flow rate of the mixing tank is represented, and t represents the mixing time of the mixing tank.
By passing throughCalculating the angular velocity of the stirrer in the mixing tank>The method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>Indicating the acceleration of gravity>Representing the resistance coefficient>Represents the density of water>Indicates the number of stirrer paddles of the mixing tank, +.>Indicating the number of stirrer layers of the mixing tank, +.>Represents the width of the stirrer blade of the mixing tank, R represents the stirrer blade radius of the mixing tank, +.>Showing the stirrer blade angle of the mixing tank.
By passing throughThe stirrer reference number of revolutions of the mixing tank was calculated.
Embodiments of the present disclosure provide for referencing values in accordance with velocity gradients in a mixing tankCalculating the reference number of revolutions of the stirrerThe above-mentioned process is obtained by analyzing the relationship between each operation parameter of the mixing tank.
In one embodiment of the present disclosure, the coagulation reaction tank is a flocculation tank, and the method for calculating the reference revolution of the stirrer includes:
by passing throughCalculating the total power dissipated when the stirrer of the flocculation basin rotates; wherein (1)>=/>，/>A speed gradient reference value representing the flocculation basin, +.>，/>Represents the dynamic viscosity of the water in the flocculation basin under the condition of the reference water temperature,/->Representing the volume of water in the flocculation basin.
By passing throughCalculating the angular velocity of the stirrer in the flocculation basin>The method comprises the steps of carrying out a first treatment on the surface of the Wherein P represents the total power dissipated when the stirrer is rotated, < >>Represents the number of different slurry radii of the stirrer, m represents the number of slurry plates on the same slurry radius,/for the stirrer>Represents the coefficient of resistance to flow, +.>Represents the density of water>Represents the inner edge rotation radius of the paddle +.>The paddle outer edge radius of rotation is indicated, and L indicates the paddle length.
By passing throughThe reference number of revolutions of the agitator of the flocculation basin is calculated.
Embodiments of the present disclosure provide for reference values in accordance with a velocity gradient in a flocculation basinCalculating the reference number of revolutions of the stirrerThe above-mentioned process is obtained by means of the relation between the various operating parameters of the flocculation basin.
In one embodiment of the present disclosure, the coagulation parameters include effluent turbidity, and determining a target velocity gradient value from a plurality of velocity gradient values according to the coagulation parameters corresponding to the respective agitation parameters includes:
sequencing the effluent turbidity corresponding to each stirring parameter according to the size, and determining the speed gradient value corresponding to the minimum effluent turbidity as a target speed gradient value.
In the embodiment of the present disclosure, the coagulation parameter may be turbidity of the effluent, the water after coagulation treatment is clearer, and the turbidity is significantly reduced, so that the coagulation effect may be estimated according to the turbidity of the effluent, and the detection of the turbidity of the effluent may be implemented by an online turbidity monitor, which is common knowledge in the art and is not described herein.
In addition, the coagulation effect can be evaluated by manually observing the state and the sedimentation effect of the flock, the water after coagulation treatment can see obvious formation of the flock, the size of the flock is moderate, the structure is compact, and the flock can be quickly settled to the water bottom.
In one embodiment of the present disclosure, obtaining a plurality of velocity gradient values corresponding to a coagulation reaction tank includes:
acquiring a preset speed gradient reference value。
Increasing or decreasing the speed gradient reference value according to a preset step lengthA plurality of velocity gradient values are obtained.
In the embodiment of the present disclosure, a speed gradient value commonly used in the past operation may be first employed as the speed gradient reference valueAnd at the speed gradient reference value +.>On the basis of the above, a certain step length is adjusted upwards or downwards to obtain a plurality of speed gradient values, the rotation number of the stirrer corresponding to the speed gradient values is calculated to control the rotation speed of the stirrer, a corresponding coagulation effect is obtained, and the optimal speed gradient value is selected according to the coagulation effect.
Since the change in coagulation parameters is delayed by about 2 hours compared to the change in rotational speed of the mixer, the time interval between two adjacent adjustment operations is greater than 2 hours when the gradient value of the speed is adjusted up or down.
Corresponding to the above method for controlling coagulation stirring according to the embodiment, fig. 2 is a block diagram of a coagulation stirring control device according to an embodiment of the disclosure. For ease of illustration, only portions relevant to embodiments of the present disclosure are shown. Referring to fig. 2, the coagulation agitation control device 20 includes: an acquisition unit 21, a calculation unit 22, a processing unit 23, and an output unit 24.
Wherein, the obtaining unit 21 is used for obtaining a plurality of speed gradient values corresponding to the coagulation reaction tank.
The calculation unit 22 is configured to calculate a plurality of agitation parameters corresponding to a plurality of velocity gradient values, respectively, based on a relational expression constructed in advance.
The processing unit 23 is configured to determine a target speed gradient value from a plurality of speed gradient values according to coagulation parameters corresponding to the plurality of stirring parameters.
The output unit 24 is used for performing coagulation stirring control on the coagulation reaction tank based on the target speed gradient value.
In one embodiment of the present disclosure, the stirring parameter is the stirrer revolution number, and the pre-established relationship is:
wherein,for the speed gradient reference value, +.>For the stirrer reference revolutions>The speed gradient value is represented, and n is the number of stirrer revolutions obtained from the speed gradient value.
In one embodiment of the present disclosure, the coagulation agitation control apparatus further includes:
a correction unit for correcting the water temperature according to the current water temperature TThe stirrer revolutions are corrected. Wherein (1)>Dynamic viscosity of water in coagulation reaction tank under reference water temperature condition +.>Is the correction value for the stirrer revolution n.
In one embodiment of the present disclosure, the coagulation reaction tank is a mixing tank, and the calculating unit 22 is specifically configured to:
by passing throughCalculating the mixing power of the mixing tank>. Wherein (1)>，/>A speed gradient reference value representing the mixing tank, +.>=/>，/>Represents the dynamic viscosity of the water in the mixing tank under the condition of the reference water temperature,/->The flow rate of the mixing tank is represented, and t represents the mixing time of the mixing tank.
By passing throughCalculating the angular velocity of the stirrer in the mixing tank>. Wherein (1)>Indicating the acceleration of gravity>Representing the resistance coefficient>Represents the density of water>Indicates the number of stirrer paddles of the mixing tank, +.>Indicating the number of stirrer layers of the mixing tank, +.>Represents the width of the stirrer blade of the mixing tank, R represents the stirrer blade radius of the mixing tank, +.>Showing the stirrer blade angle of the mixing tank.
By passing throughThe stirrer reference number of revolutions of the mixing tank was calculated.
In one embodiment of the present disclosure, the coagulation reaction tank is a flocculation tank, and the calculating unit 22 is specifically configured to:
by passing throughThe total power dissipated when the agitators of the flocculation basin are rotated is calculated. Wherein (1)>=/>，/>A speed gradient reference value representing the flocculation basin, +.>，/>Represents the dynamic viscosity of the water in the flocculation basin under the condition of the reference water temperature,/->Representing the volume of water in the flocculation basin.
By passing throughCalculating the angular velocity of the stirrer in the flocculation basin>. Wherein P represents the total power dissipated when the stirrer is rotated, < >>Represents the number of different slurry radii of the stirrer, m represents the number of slurry plates on the same slurry radius,/for the stirrer>Represents the coefficient of resistance to flow, +.>Represents the density of water>Represents the inner edge rotation radius of the paddle +.>The paddle outer edge radius of rotation is indicated, and L indicates the paddle length.
By passing throughThe reference number of revolutions of the agitator of the flocculation basin is calculated.
In one embodiment of the present disclosure, the coagulation parameter includes effluent turbidity, and the processing unit 23 is specifically configured to:
sequencing the effluent turbidity corresponding to each stirring parameter according to the size, and determining the speed gradient value corresponding to the minimum effluent turbidity as a target speed gradient value.
In one embodiment of the present disclosure, the obtaining unit 21 is specifically configured to:
acquiring a preset speed gradient reference value。
Increasing or decreasing the speed gradient reference value according to a preset step lengthA plurality of velocity gradient values are obtained.
Referring to fig. 3, fig. 3 is a schematic block diagram of a blender controller provided by an embodiment of the present disclosure. The pulsator controller 300 in the present embodiment as shown in fig. 3 may include: one or more processors 301, one or more input devices 302, one or more output devices 303, and one or more memories 304. The processor 301, the input device 302, the output device 303, and the memory 304 communicate with each other via a communication bus 305. The memory 304 is used to store a computer program comprising program instructions. The processor 301 is configured to execute program instructions stored in the memory 304. Wherein the processor 301 is configured to invoke program instructions to perform the functions of the modules/units in the various device embodiments described above, such as the functions of the units 21 to 24 shown in fig. 2.
It should be appreciated that in the disclosed embodiments, the processor 301 may be a central processing unit (Central Processing Unit, CPU), which may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The input device 302 may include a touch pad, a fingerprint sensor (for collecting fingerprint information of a user and direction information of a fingerprint), a microphone, etc., and the output device 303 may include a display (LCD, etc.), a speaker, etc.
The memory 304 may include read only memory and random access memory and provides instructions and data to the processor 301. A portion of memory 304 may also include non-volatile random access memory. For example, the memory 304 may also store information of device type.
In a specific implementation, the processor 301, the input device 302, and the output device 303 described in the embodiments of the present disclosure may perform the implementation manners described in the first embodiment and the second embodiment of the coagulation and stirring control method provided in the embodiments of the present disclosure, and may also perform the implementation manner of the terminal described in the embodiments of the present disclosure, which is not described herein again.
In another embodiment of the present disclosure, a computer storage medium is provided, where the computer storage medium stores a computer program, where the computer program includes program instructions, where the program instructions, when executed by a processor, implement all or part of the procedures in the method embodiments described above, or may be implemented by instructing related hardware by the computer program, where the computer program may be stored in a computer storage medium, where the computer program, when executed by the processor, implements the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, executable files or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the content of the computer readable medium can be appropriately increased or decreased according to the requirements of the jurisdiction's jurisdiction and the patent practice, for example, in some jurisdictions, the computer readable medium does not include electrical carrier signals and telecommunication signals according to the jurisdiction and the patent practice.
The computer storage medium may be an internal storage unit of the terminal of any of the foregoing embodiments, for example, a hard disk or a memory of the terminal. The computer storage medium may also be an external storage device of the terminal, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the terminal. Further, the computer storage medium may also include both an internal storage unit and an external storage device of the terminal. The computer storage medium is used for storing computer programs and other programs and data required by the terminal. The computer storage medium may also be used for temporarily storing data that has been output or is to be output.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working procedures of the terminal and the unit described above may refer to the corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In several embodiments provided in the present application, it should be understood that the disclosed terminal and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via some interfaces or units, or may be an electrical, mechanical, or other form of connection.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purposes of the embodiments of the present disclosure.
In addition, each functional unit in each embodiment of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The foregoing is merely a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any equivalent modifications or substitutions will be apparent to those skilled in the art within the scope of the present disclosure, and these modifications or substitutions should be covered in the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (10)

1. A coagulation/stirring control method, comprising:
acquiring a plurality of speed gradient values corresponding to the coagulation reaction tank;
respectively calculating a plurality of stirring parameters corresponding to the plurality of speed gradient values based on a pre-established relational expression;
determining a target speed gradient value from the plurality of speed gradient values according to coagulation parameters corresponding to the plurality of stirring parameters;
and carrying out coagulation stirring control on the coagulation reaction tank based on the target speed gradient value.
2. The coagulation agitation control method of claim 1, wherein the agitation parameter is the number of revolutions of the agitator, and the pre-constructed relationship is:
，
wherein,for the speed gradient reference value, +.>For the stirrer reference revolutions>Represents any velocity gradient value, and n is the stirrer revolution number obtained according to the any velocity gradient value.
3. The coagulation agitation control method of claim 2, further comprising:
according to the current water temperature T, byCorrecting the revolution of the stirrer; wherein (1)>Dynamic viscosity of water in coagulation reaction tank under reference water temperature condition +.>Is the correction value for the stirrer revolution n.
4. A coagulation agitation control method as recited in claim 2 or 3, wherein the coagulation reaction tank is a mixing tank, and the calculation method of the reference revolution of the agitator comprises:
by passing throughCalculating the mixing power of the mixing tank>The method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>，/>A speed gradient reference value representing the mixing tank, +.>=/>，/>Represents the dynamic viscosity of the water in the mixing tank under the condition of the reference water temperature,/->The flow of the mixing tank is represented, and t represents the mixing time of the mixing tank;
by passing throughCalculating the angular velocity of the stirrer in the mixing tank>The method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>Indicating the acceleration of gravity>Representing the resistance coefficient>Represents the density of water>Indicates the number of stirrer paddles of the mixing tank, +.>Indicating the number of stirrer layers of the mixing tank, +.>Represents the width of the stirrer blade of the mixing tank, R represents the stirrer blade radius of the mixing tank, +.>Showing the stirrer paddle fold angle of the mixing tank; by->The stirrer reference number of revolutions of the mixing tank was calculated.
5. A coagulation agitation control method as recited in claim 2 or 3, wherein the coagulation reaction tank is a flocculation tank, and the calculation method of the reference revolution of the agitator comprises:
by passing throughCalculating the total power dissipated when the stirrer of the flocculation basin rotates; wherein (1)>=/>，A speed gradient reference value representing the flocculation basin, +.>，/>Represents the dynamic viscosity of the water in the flocculation basin under the condition of the reference water temperature,/->Representing the volume of water in the flocculation basin;
by passing throughCalculating the angular velocity of the stirrer in the flocculation basin>The method comprises the steps of carrying out a first treatment on the surface of the Wherein P represents the total power dissipated when the stirrer is rotated, < >>Represents the number of different slurry radii of the stirrer, m represents the number of slurry plates on the same slurry radius,/for the stirrer>Represents the coefficient of resistance to flow, +.>Represents the density of water>Represents the inner edge rotation radius of the paddle +.>The outer edge rotation radius of the paddle is represented, and L represents the length of the paddle;
by passing throughThe reference number of revolutions of the agitator of the flocculation basin is calculated.
6. The coagulation agitation control method of claim 1, wherein the coagulation parameters comprise effluent turbidity, and wherein determining the target velocity gradient value from the plurality of velocity gradient values based on the coagulation parameters corresponding to the respective agitation parameters comprises:
sequencing the effluent turbidity corresponding to each stirring parameter according to the size, and determining the speed gradient value corresponding to the minimum effluent turbidity as a target speed gradient value.
7. The coagulation agitation control method as recited in claim 1, wherein said obtaining a plurality of velocity gradient values corresponding to the coagulation reaction tank comprises:
acquiring a preset speed gradient reference value；
Increasing or decreasing the speed gradient reference value according to a preset step lengthA plurality of velocity gradient values are obtained.
8. A coagulation/stirring control device, comprising:
the acquisition unit is used for acquiring a plurality of speed gradient values corresponding to the coagulation reaction tank;
a calculating unit, configured to calculate a plurality of stirring parameters corresponding to the plurality of velocity gradient values based on a pre-constructed relational expression, respectively;
the processing unit is used for determining a target speed gradient value from the plurality of speed gradient values according to coagulation parameters corresponding to the plurality of stirring parameters;
and the output unit is used for carrying out coagulation stirring control on the coagulation reaction tank based on the target speed gradient value.
9. A stirrer controller comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any one of claims 1 to 7 when the computer program is executed by the processor.
10. A computer storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any one of claims 1 to 7.
CN202311811517.4A 2023-12-27 2023-12-27 Coagulation stirring control method and device, stirrer controller and storage medium Active CN117463237B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008055299A (en) * 2006-08-30 2008-03-13 Toshiba Corp Flocculating sedimentation treating equipment
CN101708385A (en) * 2009-12-10 2010-05-19 吉林大学 Multistage velocity gradient fluidized bed coagulation device
CN115231762A (en) * 2022-07-15 2022-10-25 中建环能科技股份有限公司 Control method based on magnetic coagulation water treatment system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008055299A (en) * 2006-08-30 2008-03-13 Toshiba Corp Flocculating sedimentation treating equipment
CN101708385A (en) * 2009-12-10 2010-05-19 吉林大学 Multistage velocity gradient fluidized bed coagulation device
CN115231762A (en) * 2022-07-15 2022-10-25 中建环能科技股份有限公司 Control method based on magnetic coagulation water treatment system

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