CN116119764A - Domestic sewage purifying tank and control method thereof - Google Patents
Domestic sewage purifying tank and control method thereof Download PDFInfo
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- CN116119764A CN116119764A CN202310416608.1A CN202310416608A CN116119764A CN 116119764 A CN116119764 A CN 116119764A CN 202310416608 A CN202310416608 A CN 202310416608A CN 116119764 A CN116119764 A CN 116119764A
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- 239000010865 sewage Substances 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000002699 waste material Substances 0.000 claims abstract description 19
- 238000000746 purification Methods 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 276
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 8
- 239000010721 machine oil Substances 0.000 claims description 7
- 230000001133 acceleration Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000010806 kitchen waste Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005238 degreasing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005587 bubbling Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- 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
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- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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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Abstract
The invention relates to the field of domestic sewage treatment, in particular to a domestic sewage purifying tank and a control method thereof. According to the method, operation data of different operation powers under fixed initial oil content are obtained through various detectors, and first oil removal efficiency under each power is obtained according to an oil content change sequence, operation time and operation power in the operation data. And grouping the operation power according to the similarity of the oil content change sequences, obtaining the reference weight of each group according to the maximum change amount of the oil content in each operation power group, and adjusting each first oil removal efficiency according to the reference weight to obtain the second oil removal efficiency. And obtaining the optimal operation power of each fixed initial oil content according to the second oil removal efficiency corresponding to the operation power. The oil removal bubble machine is controlled to operate at the optimal operating power through the real-time oil content of the sewage. The invention intelligently controls the running power aiming at the oil content of sewage, ensures the purification efficiency and prevents energy waste.
Description
Technical Field
The invention relates to the field of domestic sewage treatment, in particular to a domestic sewage purifying tank and a control method thereof.
Background
Along with modern construction of villages and towns, kitchen waste water treatment of life is an important part in the construction process. The kitchen waste water contains a large amount of waste oil, and the random discharge is easy to influence the environmental sanitation. And for ecological construction, the ecological cycle can improve the economic manufacturing capability, can separate the waste oil in kitchen waste water, can be used for realizing resource utilization by secondary processing of the waste oil in soap manufacture and the like, and improves the economic manufacturing capability.
Because oil-water density is different, grease in kitchen waste water can float above sewage, so can utilize the deoiling bubble machine to handle sewage, through producing a large amount of intensive bubbles, utilize the bubble to adsorb the waste oil in the sewage and come up to the surface of water, realize high-efficient water-oil separation.
The power of the oil removal bubble machine is fixedly arranged in the common waste oil treatment process, but the efficiency cannot reach the standard and influence the purification oil removal efficiency due to the fact that the oil content in the sewage tank is different; and the fixed power is too large, so that the efficiency is saturated, and the resource waste is caused.
Disclosure of Invention
In order to solve the problems, the invention provides a domestic sewage purifying tank and a control method thereof.
The adopted technical scheme is as follows:
the invention provides a domestic sewage purifying tank, which comprises a sewage purifying tank body and a bubble machine oil removal control system, wherein the bubble machine oil removal control system comprises a controller, and a bubble machine power detector and a sewage oil content detector which are connected with the controller in a signal manner;
the air bubble machine power detector is used for detecting the operation power of the oil removal air bubble machine, and the sewage oil content detector is used for detecting the oil content of sewage in the purifying tank;
the controller obtains an oil content sequence of the sewage with fixed initial oil content for processing according to different running powers of the oil removal bubble machine according to preset sampling time; obtaining an oil content change sequence according to the oil content sequence; acquiring the operation time of the oil removal process under each operation power according to the sewage oil content sequence; obtaining a first oil removal efficiency under each operating power according to the oil content change sequence, the operating time and the operating power; grouping the operation power according to the similarity degree of the oil content change sequences under different operation powers to obtain a plurality of operation power groups; obtaining the maximum variation of each oil content variation sequence; obtaining an average value of the maximum variation in each operating power group; obtaining a reference weight of each running power group according to the average value; adjusting the first oil removal efficiency in the operation power group according to the reference weight to obtain second oil removal efficiency; obtaining the optimal operation power under the fixed initial oil content according to the second oil removal efficiency corresponding to each operation power; obtaining said optimum operating power at different said fixed initial oil contents; and acquiring the oil content of the real-time sewage, acquiring the corresponding optimal operation power according to the oil content of the real-time sewage, and controlling the oil removal bubble machine to operate at the optimal operation power.
The invention also provides a control method of the domestic sewage purifying tank, which comprises the following steps:
obtaining an oil content sequence of the sewage with fixed initial oil content by processing different operation powers of the oil removal bubble machine according to a preset sampling time; obtaining an oil content change sequence according to the oil content sequence; acquiring the operation time of the oil removal process under each operation power according to the sewage oil content sequence;
obtaining a first oil removal efficiency under each operating power according to the oil content change sequence, the operating time and the operating power;
grouping the operation power according to the similarity degree of the oil content change sequences under different operation powers to obtain a plurality of operation power groups; obtaining the maximum variation of each oil content variation sequence; obtaining an average value of the maximum variation in each operating power group; obtaining a reference weight of each running power group according to the average value; adjusting the first oil removal efficiency in the operation power group according to the reference weight to obtain second oil removal efficiency;
obtaining the optimal operation power under the fixed initial oil content according to the second oil removal efficiency corresponding to each operation power; obtaining said optimum operating power at different said fixed initial oil contents; and acquiring the oil content of the real-time sewage, acquiring the corresponding optimal operation power according to the oil content of the real-time sewage, and controlling the oil removal bubble machine to operate at the optimal operation power.
Further, the obtaining the oil content variation sequence according to the oil content sequence comprises:
and constructing the oil content change sequence according to the difference value between each element in the oil content sequence and the last element.
Further, the obtaining the operation time of the oil removal process under each operation power according to the sewage oil content sequence comprises the following steps:
and obtaining the time interval between the element with zero oil content in the sewage and the initial element in the sewage oil content sequence, and taking the time interval as the running time.
Further, the obtaining the first oil removal efficiency at each of the operating powers according to the oil content variation sequence, the operating time, and the operating power includes:
obtaining the first oil removal efficiency according to an oil removal efficiency calculation formula; the oil removal efficiency calculation formula comprises:
wherein ,
for the first oil removal efficiency to be described,
for the first element in the sequence of oil content changes,
is the density of the waste oil,
in order for the local gravitational acceleration to be the same,
for the purpose of the said run-time,
for said operating power.
Further, the grouping the operating powers according to the similarity of the oil content variation sequences under different operating powers, and obtaining a plurality of operating power groups includes:
obtaining the similarity according to a similarity formula; the similarity formula comprises:
wherein ,
to the extent of similarity of the oil content variation sequences between operating power a and operating power B,
to run the oil content variation sequence of power a,
to run the oil content variation sequence of power B,
is that
Is used for the average value of (a),
is that
Is used for the average value of (a),
calculating a function for the pearson coefficients;
taking the reciprocal of the similarity degree as a sample distance between the operation powers; and classifying the running powers by using a density clustering algorithm according to the sample distance to obtain a plurality of running power groups.
Further, the obtaining the reference weight of each of the running power groups according to the average value includes:
normalizing the average value of all the running power groups, and taking the normalized average value as the reference weight.
Further, said adjusting said first oil removal efficiency within said operating power group according to said reference weight, obtaining a second oil removal efficiency comprising:
multiplying the reference weight by the first oil removal efficiency of each operating power in the corresponding operating power group to obtain the second oil removal efficiency.
Further, the obtaining the optimal operation power under the fixed initial oil content according to the second oil removal efficiency corresponding to each operation power comprises:
taking the operating power and the corresponding second oil removal efficiency as coordinate information; performing Gaussian fitting on the coordinate information to obtain a Gaussian model; and taking the operation power corresponding to the mathematical expectation of the Gaussian model as the optimal operation power.
The embodiment of the invention has at least the following beneficial effects:
according to the embodiment of the invention, the plurality of detectors are arranged to obtain the operation data of different powers of the oil removal bubble machine in the sewage purification tank under the condition of fixed initial oil content, and the first oil removal efficiency of each operation power is obtained according to the operation data. Because the optimal oil removal efficiency can be realized by the existence of the optimal operation power for a fixed initial oil content, the similarity between the oil content change sequences is utilized for grouping the operation powers, the reference weight in the group is further obtained, and the oil removal efficiency difference under different operation powers is enlarged according to the reference weight, so that the oil removal efficiency corresponding to the optimal operation power is more outstanding. The size of the fixed initial oil content is changed to obtain the corresponding optimal operation power, the controller is used for controlling the oil removal bubble machine, the intelligent adjustment of the operation power for different sewage oil contents is realized, the purification efficiency is increased, and the energy waste is prevented.
Drawings
FIG. 1 is a schematic diagram of a bubble machine degreasing control system of a sewage purifying tank provided by the invention;
fig. 2 is a flow chart of a control method of the domestic sewage purifying tank provided by the invention.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description refers to a domestic sewage purifying tank and a control method thereof according to the invention, and specific implementation, structure, characteristics and effects thereof are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" means that the embodiments are not necessarily the same. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
A domestic sewage purifying tank comprises a sewage purifying tank body and a bubble machine oil removal control system.
The sewage purifying tank may be a conventional sewage purifying tank equipped with a degreasing and bubbling machine, and in this embodiment, the sewage purifying tank body includes a water inlet tank, a purifying tank, a water outlet tank, and a degreasing and bubbling machine. Because the sewage purifying tank is a common sewage purifying tank, the structural composition, the working principle and the working process are not repeated.
The schematic diagram of a bubble machine oil removal control system of a sewage purifying tank is shown in fig. 1, and the bubble machine oil removal control system comprises a controller 101, a bubble machine power detector 102 and a sewage oil content detector 103, wherein the bubble machine power detector 102 and the sewage oil content detector 103 are connected with the controller in a signal mode.
The air bubble machine power detector is used for detecting the running power of the oil removal air bubble machine, and the sewage oil content detector is used for detecting the oil content of sewage in the purifying tank.
The controller can be a conventional operation control chip, such as a singlechip.
The bubble machine power detector can use a conventional power detection device to obtain operation power information by detecting power data of the oil removal bubble machine.
The sewage oil content detector can use an ultraviolet visible photometer. The ultraviolet-visible photometer is based on the principle of ultraviolet-visible photometry, and utilizes substance molecules to absorb radiation in the ultraviolet-visible broad spectrum region to analyze the oil content, and the higher the waste oil content in sewage is, the higher the absorbance to ultraviolet-visible light is. In the embodiment of the invention, the sewage tank is divided into a plurality of water level sections according to the height of the sewage tank, and because the volume of waste oil in kitchen waste sewage is smaller than that of integral sewage, the photometer can be arranged below the water level sections according to specific tasks, so that the integral oil content of the sewage is ensured to be accurately calculated, and the influence of floating waste oil on data accuracy is avoided.
It should be noted that, the sewage in the oil removal process needs to be treated by other purification modes in the sewage purification tank, such as filtration, etc., and the oil removal operation is performed after the solid impurities affecting the accuracy of the operation data are reduced.
The controller executes a control method flow chart of the domestic sewage purifying tank shown in fig. 2 according to the received data information. The method comprises the following specific steps:
step S1: acquiring an oil content sequence of the sewage with the fixed initial oil content by treating with different operation powers of the oil removal bubble machine according to a preset sampling time; obtaining an oil content change sequence according to the oil content sequence; and obtaining the running time of the oil removal process under each running power according to the sewage oil content sequence.
In the embodiment of the invention, the sampling time is set to 10 minutes, the sampling frequency is set to 2 seconds, namely the length of the oil content sequence is 300, and each element in the oil content sequence represents the oil content in the clean water tank at the moment.
And constructing an oil content change sequence according to the difference value between each element in the oil content sequence and the last element, wherein each element in the oil content change sequence is the oil content change at the corresponding moment, and the oil content change can better express the purification efficiency characteristics of different powers on the fixed initial oil content.
It should be noted that the first element in the oil content sequence is the initial oil content, i.e., the fixed initial oil content, and therefore this element is not considered in the process of converting the sequence of oil content changes. For the convenience of subsequent calculations, the difference between the elements in the oil content sequence is an absolute value.
When the oil content in the clean water tank is zero, the oil removal is finished, and the waste oil floats up on the water surface, and can be separated from oil and water and discharged through the water outlet tank. And obtaining the time interval between the element with zero oil content in the sewage and the initial element in the sewage oil content sequence, wherein the time interval is taken as the running time. The operation time means the treatment time of the sewage treated by maintaining the operation power of the bubble machine at a fixed initial oil content.
Step S2: and obtaining the first oil removal efficiency under each operation power according to the oil content change sequence, the operation time and the operation power.
For a fixed initial oil content, if a smaller operating power is used for treatment, the time spent on operation is larger and the oil removal efficiency is lower; if a larger operating power is used for the treatment, the energy waste is caused although the operating time is shorter. Therefore, the oil removal efficiency is changed from small to large along with the operation power, and the oil removal efficiency index can be obtained according to the characteristics, and the oil removal efficiency index specifically comprises the following steps:
obtaining first oil removal efficiency according to an oil removal efficiency calculation formula; the oil removal efficiency calculation formula comprises:
wherein ,
for the first oil removal efficiency, the oil is removed,
for the first element in the sequence of oil content changes,
is the density of the waste oil,
in order for the local gravitational acceleration to be the same,
in order for the run-time to be run,
for operating power.
In the oil removal efficiency calculation formula, the denominator can be regarded as the work done by the oil removal bubble machine, and the work done is similar for two operation powers with larger difference, but for larger operation powers, because the oil removal bubble machine generates more bubbles, the oil content change data in the first sampling time is larger than the oil content change data corresponding to the operation power with smaller oil content change data, namely the larger the operation power is, the larger the first oil removal efficiency is. When the operating power is optimal, the first oil removal efficiency is maximized. When the operation power is larger than the optimal operation power, the oil content change data corresponding to the two operation powers are consistent with the operation time, but the larger operation power causes energy waste, so that after the optimal operation power, the larger operation power is, the smaller the first oil removal efficiency is.
The waste oil density and the local gravitational acceleration may be determined by conventional data, and are not limited herein. The first oil removal efficiency is an index value, is not a physical quantity with substantial meaning, and aims to express the efficiency change characteristics of different operation powers under the condition of fixed initial oil content.
Step S3: grouping the operation power according to the similarity degree of the oil content change sequences under different operation powers to obtain a plurality of operation power groups; obtaining the maximum variation of each oil content variation sequence; obtaining an average value of the maximum variation in each running power group; obtaining a reference weight of each running power group according to the average value; and adjusting the first oil removal efficiency in the operation power group according to the reference weight to obtain the second oil removal efficiency.
For different operation powers, the corresponding oil removal efficiency characteristics are not obvious to increase and decrease, and in order to increase the characteristic effect and enhance the referential of the subsequent optimal operation efficiency, the first oil removal efficiency obtained in the step S2 needs to be adjusted according to the operation data, so that the difference between the oil removal efficiencies corresponding to different operation powers is increased.
The influence of different operation powers on the fixed initial oil content is probably the same, and the method can be embodied by an oil content change sequence, namely, the more similar the values of the oil content change sequence are, the more similar the change trend is, the more similar the corresponding operation powers have the influence on the fixed initial oil content, and the method can be classified into a group of operation power groups for analysis in the subsequent analysis, so that the corresponding first oil removal efficiency is adjusted together, and the method specifically comprises the following steps:
and obtaining the similarity according to a similarity formula. The similarity formula includes:
wherein ,
to the extent that the sequence of oil content changes between operating power a and operating power B is similar,
to run the oil content variation sequence for power a,
to run the oil content variation sequence for power B,
is that
Is used for the average value of (a),
is that
Is used for the average value of (a),
is Peel (Peel)And calculating a function by using the coefficients.
The reciprocal of the degree of similarity is taken as the sample distance between the operating powers. And classifying the running power by using a density clustering algorithm according to the sample distance to obtain a plurality of running power groups.
The maximum variation in the sequence of oil content variation can be a representative feature of the sequence, i.e., the maximum variation for a smaller operating power will be less than the maximum variation for a larger operating power. The reference weight of each operation power group can be obtained according to the average value of the maximum variation in each operation power group, and the method specifically comprises the following steps:
the average value of all running power groups is normalized, and the normalized average value is taken as a reference weight. The integral data is normalized, so that the direct data difference of different running powers can be effectively represented, and the subsequent result has stronger referential property.
And multiplying the reference weight by the first oil removal efficiency of each operating power in the corresponding operating power group to obtain the second oil removal efficiency. The second oil removal efficiency is subjected to reference weight treatment, so that the direct difference of different running powers is enlarged, and the subsequent analysis is convenient.
Step S4: obtaining the optimal operation power under the fixed initial oil content according to the second oil removal efficiency corresponding to each operation power; obtaining optimal operating power of different fixed initial oil contents; and acquiring the oil content of the real-time sewage, acquiring the corresponding optimal operation power according to the oil content of the real-time sewage, and controlling the oil removal bubble machine to operate at the optimal operation power.
The second oil removal efficiency has stronger referential property, and the difference of the second oil removal efficiencies corresponding to different operation powers is larger, so that the optimal operation power under the fixed initial oil content can be obtained according to the second oil removal efficiency corresponding to each operation power, and the method specifically comprises the following steps:
the difference between the second oil removal efficiency after the reference weight treatment is more obvious, and the change characteristic of the oil removal efficiency along with the change of the operation power analyzed before is combined, so that the change characteristic can be considered to be subjected to Gaussian distribution, and the operation power and the corresponding second oil removal efficiency are taken as coordinate information; and performing Gaussian fitting on the coordinate information to obtain a Gaussian model. The operation power corresponding to the mathematical expectation of the Gaussian model is taken as the optimal operation power.
By varying the fixed initial oil content, optimum operating power for different fixed initial oil contents can be obtained. In the real-time purification process, the real-time sewage oil content is obtained, the corresponding optimal operation power is obtained according to the real-time sewage oil content, and the oil removal bubble machine is controlled to operate at the optimal operation power, so that intelligent control is realized. The specific control method may utilize a conventional power control method, and is not limited herein. The sewage treatment and resource recycling in the whole living range are realized through the decentralized installation of the sewage purifying tank.
In summary, according to the embodiment of the invention, the operation data of different operation powers under the fixed initial oil content is obtained through various detectors, and the first oil removal efficiency under each power is obtained according to the oil content change sequence, the operation time and the operation power in the operation data. And grouping the operation power according to the similarity of the oil content change sequences, obtaining the reference weight of each group according to the maximum change amount of the oil content in each operation power group, and adjusting each first oil removal efficiency according to the reference weight to obtain the second oil removal efficiency. And obtaining the optimal operation power of each fixed initial oil content according to the second oil removal efficiency corresponding to the operation power. The oil removal bubble machine is controlled to operate at the optimal operating power through the real-time oil content of the sewage. The embodiment of the invention intelligently controls the running power aiming at the oil content of sewage, ensures the purification efficiency and prevents energy waste.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (9)
1. The domestic sewage purifying tank comprises a sewage purifying tank body and is characterized by further comprising a bubble machine oil removal control system, wherein the bubble machine oil removal control system comprises a controller, and a bubble machine power detector and a sewage oil content detector which are connected with the controller in a signal manner;
the air bubble machine power detector is used for detecting the operation power of the oil removal air bubble machine, and the sewage oil content detector is used for detecting the oil content of sewage in the purifying tank;
the controller obtains an oil content sequence of the sewage with fixed initial oil content for processing according to different running powers of the oil removal bubble machine according to preset sampling time; obtaining an oil content change sequence according to the oil content sequence; acquiring the operation time of the oil removal process under each operation power according to the sewage oil content sequence; obtaining a first oil removal efficiency under each operating power according to the oil content change sequence, the operating time and the operating power; grouping the operation power according to the similarity degree of the oil content change sequences under different operation powers to obtain a plurality of operation power groups; obtaining the maximum variation of each oil content variation sequence; obtaining an average value of the maximum variation in each operating power group; obtaining a reference weight of each running power group according to the average value; adjusting the first oil removal efficiency in the operation power group according to the reference weight to obtain second oil removal efficiency; obtaining the optimal operation power under the fixed initial oil content according to the second oil removal efficiency corresponding to each operation power; obtaining said optimum operating power at different said fixed initial oil contents; and acquiring the oil content of the real-time sewage, acquiring the corresponding optimal operation power according to the oil content of the real-time sewage, and controlling the oil removal bubble machine to operate at the optimal operation power.
2. A method for controlling a domestic sewage purification tank, the method comprising:
acquiring an oil content sequence of the sewage with the fixed initial oil content by treating with different operation powers of the oil removal bubble machine according to a preset sampling time; obtaining an oil content change sequence according to the oil content sequence; acquiring the operation time of the oil removal process under each operation power according to the sewage oil content sequence;
obtaining a first oil removal efficiency under each operating power according to the oil content change sequence, the operating time and the operating power;
grouping the operation power according to the similarity degree of the oil content change sequences under different operation powers to obtain a plurality of operation power groups; obtaining the maximum variation of each oil content variation sequence; obtaining an average value of the maximum variation in each operating power group; obtaining a reference weight of each running power group according to the average value; adjusting the first oil removal efficiency in the operation power group according to the reference weight to obtain second oil removal efficiency;
obtaining the optimal operation power under the fixed initial oil content according to the second oil removal efficiency corresponding to each operation power; obtaining said optimum operating power at different said fixed initial oil contents; and acquiring the oil content of the real-time sewage, acquiring the corresponding optimal operation power according to the oil content of the real-time sewage, and controlling the oil removal bubble machine to operate at the optimal operation power.
3. The method for controlling a domestic sewage purifying tank according to claim 2, wherein said obtaining an oil content variation sequence from said oil content sequence comprises:
and constructing the oil content change sequence according to the difference value between each element in the oil content sequence and the last element.
4. The method for controlling a domestic sewage purification tank according to claim 2, wherein said obtaining the operation time of each of said oil removal processes at said operation power according to said sewage oil content sequence comprises:
and obtaining the time interval between the element with zero oil content in the sewage and the initial element in the sewage oil content sequence, and taking the time interval as the running time.
5. The method of controlling a domestic sewage purification tank according to claim 2, wherein said obtaining a first oil removal efficiency at each of said operating powers based on said oil content variation sequence, said operating time and said operating power comprises:
obtaining the first oil removal efficiency according to an oil removal efficiency calculation formula; the oil removal efficiency calculation formula comprises:
wherein ,
for the first oil removal efficiency, +.>
For the first element in the sequence of oil content variation, -/->
For waste oil density->
For local gravitational acceleration +.>
For the run time, +.>
For said operating power.
6. The method for controlling a domestic sewage purification tank according to claim 2, wherein said grouping said operating powers according to the degree of similarity of said sequence of oil content variation at different said operating powers, obtaining a plurality of operating power groups comprises:
obtaining the similarity according to a similarity formula; the similarity formula comprises:
wherein ,
for the degree of similarity of the sequence of oil content changes between operating power A and operating power B, +.>
For operating the oil content variation sequence of power A, +.>
For operating the oil content variation sequence of power B, +.>
Is->
Average value of>
Is->
Average value of>
Calculating a function for the pearson coefficients;
taking the reciprocal of the similarity degree as a sample distance between the operation powers; and classifying the running powers by using a density clustering algorithm according to the sample distance to obtain a plurality of running power groups.
7. A method of controlling a domestic sewage purification tank according to claim 2, wherein said obtaining a reference weight for each of said running power groups based on said average value comprises:
normalizing the average value of all the running power groups, and taking the normalized average value as the reference weight.
8. The method according to claim 2, wherein said adjusting the first oil removal efficiency in the operation power group according to the reference weight, to obtain the second oil removal efficiency, comprises:
multiplying the reference weight by the first oil removal efficiency of each operating power in the corresponding operating power group to obtain the second oil removal efficiency.
9. The method of claim 2, wherein said obtaining the optimum operating power at the fixed initial oil content based on the second oil removal efficiency corresponding to each of the operating powers comprises:
taking the operating power and the corresponding second oil removal efficiency as coordinate information; performing Gaussian fitting on the coordinate information to obtain a Gaussian model; and taking the operation power corresponding to the mathematical expectation of the Gaussian model as the optimal operation power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310416608.1A CN116119764B (en) | 2023-04-19 | 2023-04-19 | Domestic sewage purifying tank and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310416608.1A CN116119764B (en) | 2023-04-19 | 2023-04-19 | Domestic sewage purifying tank and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116119764A true CN116119764A (en) | 2023-05-16 |
| CN116119764B CN116119764B (en) | 2023-06-30 |
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