CN110980940A - Aeration system oxygen supply efficiency online monitoring device and optimization control method - Google Patents
Aeration system oxygen supply efficiency online monitoring device and optimization control method Download PDFInfo
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- 238000005273 aeration Methods 0.000 title claims abstract description 143
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 239000001301 oxygen Substances 0.000 title claims abstract description 115
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 115
- 238000012806 monitoring device Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005457 optimization Methods 0.000 title claims description 7
- 239000007789 gas Substances 0.000 claims abstract description 107
- 238000006243 chemical reaction Methods 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 238000012544 monitoring process Methods 0.000 claims abstract description 42
- 238000007667 floating Methods 0.000 claims abstract description 18
- 238000004891 communication Methods 0.000 claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 6
- 239000010802 sludge Substances 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 5
- 230000008859 change Effects 0.000 claims description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 5
- 239000001569 carbon dioxide Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 3
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/20—Activated sludge processes using diffusers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/20—Activated sludge processes using diffusers
- C02F3/201—Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses
-
- 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
-
- 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
Abstract
The invention discloses an oxygen supply efficiency on-line monitoring device of an aeration system, which comprises: the data acquisition terminal is arranged on a floating body which freely floats on the liquid level of the aeration biological reaction tank, moves to different monitoring points along the guide rail in parallel and is used for measuring the dissolved oxygen concentration of the mixed liquid at the different monitoring points of the aeration biological reaction tank and the content of oxygen, carbon dioxide and other components in the gas escaping from the liquid level; the data communication terminal is arranged in a pedestrian corridor at the top of the aeration biological reaction tank and is used for carrying out wireless communication with the data acquisition terminal and other possible control systems; a gas mass flow meter for measuring the amount of gas supplied; the gas regulating device is used for regulating the magnitude of the gas supply quantity; and the aeration system main control cabinet is used for data processing and logic control. The invention overcomes the defects of the prior aeration system in energy-saving and optimal control equipment and method, and provides a basis for realizing the online monitoring, diagnosis evaluation and optimal control of the oxygen supply efficiency of the aeration system of the activated sludge process.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to an oxygen supply efficiency online monitoring device of an aeration system and an optimization control method.
Background
With the continuous improvement of the urbanization level and the environmental protection requirement, the number and the scale of the construction of sewage treatment plants in China are increased day by day. The sewage treatment belongs to the energy-intensive industry, and in an activated sludge treatment system, the energy consumption cost of a sewage treatment plant accounts for 30-80% of the operation and maintenance cost of the sewage treatment plant. Wherein, the energy consumption of the aeration system accounts for 40-70% of the total energy consumption of the sewage treatment plant of the activated sludge system, and is a key link for energy consumption control.
The energy saving of the aeration system is a comprehensive system engineering, and comprises aeration equipment, water inlet conditions, operation conditions and the like, wherein the oxygen supply efficiency is a key evaluation parameter. The automatic control is an important technical means for ensuring that the quality of the effluent of the sewage treatment system is stable and reaches the standard, reducing the energy consumption and material consumption of the sewage treatment system and improving the management level of the urban sewage treatment plant. The quality and quantity of water from a sewage treatment plant fluctuate at any time, the oxygen demand for removing pollutants by microorganisms changes, and the ideal aeration control is that an aeration system adjusts the aeration rate matched with the oxygen demand in time, so that the phenomenon that the dissolved oxygen of the system fluctuates in a large range due to excessive or insufficient aeration is avoided.
At present, the control of the aeration system is mainly directed to dissolved oxygen, and when the dissolved oxygen deviates from a target value, the amount of supplied air is increased or decreased to return the dissolved oxygen to the target value. However, due to the lack of effective tools and methods for online analysis of oxygen supply efficiency of an aeration system of a sewage treatment plant, target dissolved oxygen is often set according to experience of operators, and quantitative regulation of air supply amount cannot be realized, so that fluctuation of dissolved oxygen is large, and energy saving and consumption reduction effects of aeration system control are poor.
Disclosure of Invention
The invention aims to provide an aeration system oxygen supply efficiency online monitoring device and an optimization control method, which can monitor and evaluate the oxygen supply efficiency of an aeration system of a sewage treatment plant on line, provide control target values of dissolved oxygen and air supply quantity, and provide support for realizing the stable and energy-saving control of the aeration system through the quantitative regulation of the air supply quantity.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides an aeration systems oxygen suppliment efficiency on-line monitoring device which characterized in that, aeration systems oxygen suppliment efficiency on-line monitoring device contain:
the data acquisition terminal is arranged on a floating body floating on the liquid level of the aeration biological reaction tank and moves to different monitoring points along the guide rail in parallel, and the data acquisition terminal comprises a gas collecting hood, a gas component determinator and a dissolved oxygen determinator and is used for determining the dissolved oxygen concentration of mixed liquid at different monitoring points of the aeration biological reaction tank and the content of oxygen and carbon dioxide in liquid level escaping gas;
the data communication terminal is arranged in a pedestrian corridor at the top of the aeration biological reaction tank and is used for data transmission with the data acquisition terminal and the aeration system main control cabinet;
a gas mass flow meter provided on the gas supply line for measuring the amount of gas supplied;
the gas adjusting device is arranged on the gas supply pipeline and is used for adjusting the gas supply amount;
and the aeration system main control cabinet is used for data processing and carrying out logic control on the gas regulating device and the gas supply equipment.
The oxygen supply efficiency on-line monitoring device of the aeration system comprises a data acquisition terminal and a data processing terminal, wherein the data acquisition terminal comprises:
the gas collecting hood is arranged at the lower part of one end in the data acquisition terminal and used for collecting gas escaping from the liquid surface of the aeration biological reaction tank, and the top of the gas collecting hood is provided with an air outlet pipe;
the gas dehumidifying device is arranged on the gas outlet pipe, is connected with the top end of the gas collecting hood and is used for dehumidifying the gas collected by the gas collecting hood;
the gas component measuring instrument is arranged on the gas outlet pipe and is used for measuring the content of oxygen, carbon dioxide and the like in the dehumidified liquid surface escaping gas;
the dissolved oxygen tester is arranged at the lower part of one end in the data acquisition terminal, and a probe of the dissolved oxygen tester is inserted below the liquid level and is used for testing the dissolved oxygen concentration of the mixed liquid at different monitoring points of the aeration biological reaction tank;
a mobile power supply, preferably a lithium ion battery, supplies power to the gas component determinator and the dissolved oxygen determinator through a power supply line;
and the communication module is arranged at the upper part of one end in the data acquisition terminal and is used for carrying out wireless communication with the data acquisition terminal.
The oxygen supply efficiency on-line monitoring device of the aeration system comprises:
the data acquisition terminal is integrally arranged on a floating body floating on the liquid level of the aeration biological reaction tank, and is suitable for an activated sludge process with constant or variable liquid level;
the floating body is movably connected with the vertical limiting rod, so that the data acquisition terminal is always positioned at the set monitoring point under the condition of liquid level change;
the vertical limiting rod is movably connected with the guide rail, and the data acquisition terminal moves to different monitoring points along the guide rail in parallel;
the guide rails are movably connected with transverse displacement rails arranged on the tank walls at two sides of the aeration biological reaction tank, and the guide rails transversely move along the transverse displacement rails.
The aeration system optimization control method based on the aeration system oxygen supply efficiency on-line monitoring device comprises the following steps:
A. monitoring the dissolved oxygen concentration and the liquid level gas outlet component content of different monitoring points in the aeration biological reaction tank under the actual working condition by using a data acquisition terminal;
B. analyzing the dissolved oxygen concentration and the liquid level gas outlet component content data by using the aeration system main control cabinet, and providing target dissolved oxygen and target gas supply control target values of the aeration system;
C. the control signal of the aeration system main control cabinet is utilized to control the running state of the gas regulating device or the gas supply equipment on line, and the quantitative feed-forward control is carried out on the gas supply quantity of the aeration system, so that the dissolved oxygen concentration of the aeration biological reaction tank is maintained near the set target dissolved oxygen control value, and the change of the oxygen supply efficiency of the aeration system is compensated.
The data analysis in the step B is automatic analysis in the embodiment of the invention, machine learning is carried out according to monitoring data such as gas component content, dissolved oxygen concentration, water quality of inlet and outlet water and the like under actual operation conditions, control target value algorithms of different levels are provided, and control target values of target dissolved oxygen and target gas supply quantity are comprehensively determined. In practical application, manual input of the control target value after manual analysis can be supported.
Wherein the feed-forward control of the amount of the supplied gas is quantitatively performed in step C based on the target amount of the supplied gas provided in step B, unlike the feedback control of adjusting the amount of the supplied gas based only on the change in the concentration of the dissolved oxygen. For example, the target gas supply amount needs to be changed from q by data analysis in step B1Is reduced to q2The gas supply quantity is adjusted from the current q by controlling the operating state of the gas regulating device or the gas supply device1Quantitative reduction to q2。
Compared with the prior art, the invention has the following advantages:
1. the invention provides a tool and a method for acquiring the oxygen transfer rate of an aeration system and the oxygen consumption rate in an aeration biological reaction tank on line in real time, provides a basis for maintenance and optimal control of the aeration system by scientifically evaluating the oxygen supply efficiency of the aeration system, can quickly detect the influence of water inlet impact load or toxic and harmful substances on the biological reaction system, and provides a scientific basis for timely adjusting the operation condition of a sewage treatment plant and reducing the fluctuation of the effluent quality.
2. The invention scientifically determines the target control values of the target dissolved oxygen, the target air supply quantity and the like of the aeration system by monitoring the oxygen supply efficiency of the aeration system in real time on line, realizes the on-line feedforward control of the aeration system, solves the problem that the fluctuation of the dissolved oxygen is too large because a feedback control system taking the dissolved oxygen as a main control index can only qualitatively adjust the air supply quantity, and simultaneously can further reduce the energy consumption of the aeration system by reducing the target dissolved oxygen value based on the scientific evaluation of the oxygen supply efficiency of the aeration system and solves the problem that the energy-saving and consumption-reducing effects of the control of the aeration system are poor because the target dissolved oxygen value set according to the experience of operators is too high.
3. The invention can cover the oxygen supply efficiency detection of different point positions of the aeration biological reaction tank through the translation self-floating data acquisition terminal, can adapt to the aeration biological reaction tank with liquid level change, provides data support for comprehensively evaluating the oxygen supply efficiency of different subareas of the aeration biological reaction tank, and simultaneously improves the stability of the data acquisition terminal on the liquid level of the aeration biological reaction tank through the vertical limiting rod, the guide rail and other components.
Drawings
FIG. 1 is a schematic cross-sectional view of an oxygen supply efficiency on-line monitoring device of an aeration system according to the present invention;
FIG. 2 is a schematic plan view of an oxygen supply efficiency on-line monitoring device of an aeration system according to the present invention;
FIG. 3 is a graph showing the oxygen supply efficiency (a) of a sequencing batch aeration biological reaction tank as a function of time;
FIG. 4 is a graph showing the time-dependent change of the dissolved oxygen content (b) in the sequencing batch aerated biological reaction tank.
The figure includes: the system comprises an aeration biological reaction tank 1, a data acquisition terminal 2, a data communication terminal 3, a gas component determinator 4, a dissolved oxygen determinator 5, a gas collecting hood 6, a gas outlet pipe 8, a mobile power supply 9, a power supply line 10, a communication module 11, a guide rail 12, an aeration system main control cabinet 14, a transverse shifting track 13, a floating body 15 and a vertical limiting rod 16.
Detailed Description
The present invention will now be further described by way of the following detailed description of a preferred embodiment thereof, taken in conjunction with the accompanying drawings.
An aeration system oxygen supply efficiency on-line monitoring device, the aeration system oxygen supply efficiency on-line monitoring device comprises: the data acquisition terminal 3 is arranged on a floating body 17 floating on the liquid level of the aeration biological reaction tank 1 and moves to different monitoring points along a guide rail 13 in parallel, and the data acquisition terminal 1 comprises a gas collecting hood 7, a gas component determinator 5 and a dissolved oxygen determinator 6 and is used for determining the dissolved oxygen concentration of mixed liquid at different monitoring points of the aeration biological reaction tank and the content of oxygen, carbon dioxide and other components in liquid level escaping gas; the data communication terminal 4 is arranged in a pedestrian corridor at the top of the aeration biological reaction tank 1 and is used for carrying out data transmission with the data acquisition terminal 3 and the aeration system main control cabinet 16; a gas mass flow meter 19 provided on the gas supply line 2 for measuring the amount of gas supplied; a gas adjusting device 20 provided on the gas supply duct 2 for adjusting the amount of gas supplied; and the aeration system main control cabinet 16 is used for data processing and carrying out logic control on the gas regulating device 20 and the gas supply equipment 21.
The data acquisition terminal 3 comprises: the gas collecting hood 7 is arranged at the lower part of one end in the data acquisition terminal 3 and is used for collecting gas escaping from the liquid surface of the aeration biological reaction tank 1; the gas dehumidifying device 8 is arranged on the gas outlet pipe 9 in the data acquisition terminal 3, is connected with the top end of the gas collecting hood 7 and is used for dehumidifying gas; the gas component measuring instrument 5 is arranged on the gas outlet pipe 9 in the data acquisition terminal 3 and is used for measuring the content of oxygen, carbon dioxide and the like in the gas escaping from the liquid surface; a dissolved oxygen tester 6 which is arranged at the lower part of one end in the data acquisition terminal 3, and a probe of the dissolved oxygen tester 6 is inserted below the liquid level and is used for testing the dissolved oxygen concentration of the mixed liquid at different monitoring points of the aeration biological reaction tank 1; the mobile power supply 10 adopts a lithium ion battery and supplies power to the gas component determinator 5 and the dissolved oxygen determinator 6 through a power supply line 11; and the communication module 12 is arranged at the upper part of one end in the data acquisition terminal 3 and is used for carrying out wireless communication with the data acquisition terminal 4.
The data acquisition terminal 3 is integrally arranged on a floating body 17 floating on the liquid surface of the aeration biological reaction tank 1 and is suitable for an activated sludge process with constant or variable liquid surface; the floating body 17 is movably connected with the vertical limiting rod 18, so that the data acquisition terminal 3 is always positioned at a set monitoring point under the condition of liquid level change; the vertical limiting rod 18 is movably connected with the guide rail 13, and the data acquisition terminal 3 moves to different monitoring points along the guide rail 13 in parallel; the guide rails 13 are movably connected with transverse displacement rails 14 arranged on the tank walls at two sides of the aeration biological reaction tank 1, and the guide rails 13 transversely move along the transverse displacement rails 14.
The aeration system optimization control method of the aeration system oxygen supply efficiency on-line monitoring device comprises the following steps:
monitoring the dissolved oxygen concentration of different monitoring points in the aeration biological reaction tank 1 and the content of components such as oxygen, carbon dioxide and the like discharged from the liquid surface under the actual working condition by using a data acquisition terminal 3;
analyzing the data such as the concentration of dissolved oxygen, the content of the gas-out component on the liquid surface and the like by using the main control cabinet 16 of the aeration system, and providing control target values such as target dissolved oxygen, target gas supply quantity and the like of the aeration system;
the control signal of the aeration system main control cabinet 16 is utilized to control the operation state of the gas adjusting device 20 or the gas supply equipment 21 on line, and the gas supply quantity of the aeration system is quantitatively adjusted, so that the dissolved oxygen concentration of the aeration biological reaction tank 1 is maintained near the set target dissolved oxygen control value, and the change of the oxygen supply efficiency of the aeration system caused by the change of the operation working condition and the like is compensated.
In this embodiment, as shown in fig. 2, a data acquisition terminal 3 is respectively disposed on the liquid level of two aeration biological reaction tanks 1 connected in parallel or in different zones, a common data communication terminal 4 is disposed on a pedestrian corridor between the two aeration biological reaction tanks, and the data communication terminal 4 performs data transmission with an aeration system main control cabinet 16 disposed in a central control room of a sewage treatment plant through an optical fiber.
The method of use of the present invention will be further illustrated below:
example 1:
for example, a 90m × 60m aeration biological reaction tank exists, each aeration tank is divided into 9 areas of 30m × 20m, the center of each area is a monitoring point, the data acquisition terminal 3 moves to each monitoring point through the guide rail 13 and the transverse shifting track 14 to acquire data, and each monitoring point is continuously monitored for 1-2 hours; during monitoring, the operation condition and the water inlet condition of the aeration system are kept stable as much as possible, so that the online monitoring point position and the monitoring period of the data acquisition terminal 3 can be conveniently evaluated under the same condition; the data communication terminal 4 transmits the data measured by the gas component measuring instrument 5 and the dissolved oxygen measuring instrument 6 to the aeration system main control cabinet 16 for processing. If the gas composition meter 5 measures only the mole fraction or the volume fraction of oxygen, the main calculation formula is as follows:
in formula 1, EosiThe oxygen supply efficiency of the ith monitoring area is shown, in the embodiment, i is more than or equal to 1 and less than or equal to 9; y issAnd YeiThe mole fraction or volume fraction of oxygen in the inlet air and the outlet air of the ith monitoring area pool surface respectively, the inlet air is air, Ys＝0.2095。
If the intake air is air and the gas composition measuring instrument 5 can simultaneously measure the mole fraction or the volume fraction of the oxygen and the carbon dioxide, the main calculation formula is as follows:
in formula 2, MsAnd MeiThe molar ratio or the volume ratio of oxygen to inert components in the inlet gas and the outlet gas at the surface of the ith monitoring area pool respectively, wherein the inert components comprise nitrogen and argon. MeiThe calculation formula is as follows:
in the formula 3, the first and second groups,
is the mole fraction or volume fraction of carbon dioxide in the exit gas from the cell face of the i-th monitoring area. MsDetermined according to the mole fraction or volume fraction of oxygen and carbon dioxide in the air with reference to equation 3, in this example, Ys＝0.2763。
In formula 4, EosAverage oxygen supply efficiency, Q, for a single aerated biological reaction tankiAir supply volume (m) for each monitoring area3H), assuming that the air supply volume of each monitoring area is the same, the calculation formula is as follows:
after the aeration system main control cabinet 16 completes the data calculation, the oxygen supply efficiency of each monitoring area of the aeration biological reaction tank is compared with the average oxygen supply efficiency of the aeration biological reaction tank, the optimal monitoring point position which can represent the average oxygen supply efficiency is determined, and a basis is provided for the online monitoring and control of the oxygen supply efficiency of the aeration system.
Example 2:
there were two sequencing batch type aeration biological reaction tanks, which were aerated by using a membrane disk type aerator, and the membrane aeration disks of the two aeration biological reaction tanks were used for about 3.5 years and 4.5 years, respectively, and after the optimum monitoring points of the aeration biological reaction tanks were determined by the method of example 1, the oxygen supply efficiency and dissolved oxygen of the aeration biological reaction tanks during one aeration period were continuously monitored, and the results are shown in fig. 3.
As can be seen from FIGS. 3 and 4, the aeration efficiency of the membrane aeration plate 1 using the aeration biological reaction tank 1 for 3.5 years is gradually reduced in an aeration period, the initial period of the aeration period can be maintained at about 20%, and the oxygen supply efficiency is gradually reduced to about 15% as the reaction proceeds and the concentration of dissolved oxygen is gradually increased. The oxygen supply efficiency of the aeration biological reaction tank 2 using the membrane aeration disc for 4.5 years is below 10 percent, the fluctuation is large, the oxygen supply efficiency of the aeration biological reaction tank 2 is greatly reduced along with the aging and the blockage of the aeration disc, the maintenance and the replacement time of the aeration disc are reasonably arranged, and the control of an aeration system is enhanced.
Meanwhile, although the difference of the oxygen supply efficiency of the two aeration biological reaction tanks is larger, the dissolved oxygen concentration can reach 2.0mg/L in about 80 min. Therefore, if the aeration system is controlled according to the dissolved oxygen concentration, the actual air supply amount can be increased, and the energy consumption of the aeration system can be increased. Therefore, in the running process of the aeration tank, the running state of the aeration system can be mastered in time and the running working condition of the aeration system can be quantitatively adjusted according to the change condition of the oxygen supply efficiency and the control of the dissolved oxygen. In this embodiment, if the aeration biological reaction tank 1 maintains the air supply rate unchanged, the dissolved oxygen concentration at the later stage of the aeration period will be significantly increased, which will also result in the decrease of the oxygen supply efficiency, so that the target dissolved oxygen concentration value can be appropriately decreased, and the operation condition of the aeration system can be timely adjusted, for example, the air supply rate is decreased by the gas regulating device, by shortening the operation time of the blower or by decreasing the working frequency of the blower, and the energy consumption can be saved on the basis of ensuring the sewage treatment effect.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (4)
1. The utility model provides an aeration systems oxygen suppliment efficiency on-line monitoring device which characterized in that, aeration systems oxygen suppliment efficiency on-line monitoring device contain:
the data acquisition terminal is arranged on a floating body floating on the liquid level of the aeration biological reaction tank and moves to different monitoring points along the guide rail in parallel, and the data acquisition terminal comprises a gas collecting hood, a gas component determinator and a dissolved oxygen determinator and is used for determining the dissolved oxygen concentration of mixed liquid at different monitoring points of the aeration biological reaction tank and the content of oxygen and carbon dioxide in liquid level escaping gas;
the data communication terminal is arranged in a pedestrian corridor at the top of the aeration biological reaction tank and is used for data transmission with the data acquisition terminal and the aeration system main control cabinet;
a gas mass flow meter provided on the gas supply line for measuring the amount of gas supplied;
the gas adjusting device is arranged on the gas supply pipeline and is used for adjusting the gas supply amount;
and the aeration system main control cabinet is used for data processing and carrying out logic control on the gas regulating device and the gas supply equipment.
2. An oxygen supply efficiency on-line monitoring device for aeration system according to claim 1, wherein said data acquisition terminal comprises:
the gas collecting hood is arranged at the lower part of one end in the data acquisition terminal and used for collecting gas escaping from the liquid surface of the aeration biological reaction tank, and the top of the gas collecting hood is provided with an air outlet pipe;
the gas dehumidifying device is arranged on the gas outlet pipe, is connected with the top end of the gas collecting hood and is used for dehumidifying the gas collected by the gas collecting hood;
the gas component measuring instrument is arranged on the gas outlet pipe and is used for measuring the content of oxygen, carbon dioxide and the like in the dehumidified liquid surface escaping gas;
the dissolved oxygen tester is arranged at the lower part of one end in the data acquisition terminal, and a probe of the dissolved oxygen tester is inserted below the liquid level and is used for testing the dissolved oxygen concentration of the mixed liquid at different monitoring points of the aeration biological reaction tank;
a mobile power supply, preferably a lithium ion battery, supplies power to the gas component determinator and the dissolved oxygen determinator through a power supply line;
and the communication module is arranged at the upper part of one end in the data acquisition terminal and is used for carrying out wireless communication with the data acquisition terminal.
3. The aeration system oxygen supply efficiency on-line monitoring device according to claim 1, characterized in that:
the data acquisition terminal is integrally arranged on a floating body floating on the liquid level of the aeration biological reaction tank, and is suitable for an activated sludge process with constant or variable liquid level;
the floating body is movably connected with the vertical limiting rod, so that the data acquisition terminal is always positioned at the set monitoring point under the condition of liquid level change;
the vertical limiting rod is movably connected with the guide rail, and the data acquisition terminal moves to different monitoring points along the guide rail in parallel;
the guide rails are movably connected with transverse displacement rails arranged on the tank walls at two sides of the aeration biological reaction tank, and the guide rails transversely move along the transverse displacement rails.
4. An aeration system oxygen supply efficiency on-line monitoring device aeration system optimization control method according to any one of the claims 1 to 3, characterized in that: the method comprises the following steps:
A. monitoring the dissolved oxygen concentration and the liquid level gas outlet component content of different monitoring points in the aeration biological reaction tank under the actual working condition by using a data acquisition terminal;
B. analyzing the dissolved oxygen concentration and the liquid level gas outlet component content data by using the aeration system main control cabinet, and providing target dissolved oxygen and target gas supply control target values of the aeration system;
C. the control signal of the aeration system main control cabinet is utilized to control the running state of the gas regulating device or the gas supply equipment on line, and the quantitative feed-forward control is carried out on the gas supply quantity of the aeration system, so that the dissolved oxygen concentration of the aeration biological reaction tank is maintained near the set target dissolved oxygen control value, and the change of the oxygen supply efficiency of the aeration system is compensated.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112010436A (en) * | 2020-08-25 | 2020-12-01 | 广州众行环保科技有限公司 | Method for accurately controlling dissolved oxygen in sewage treatment process |
| CN112079457A (en) * | 2020-08-25 | 2020-12-15 | 东南大学 | Aeration system capable of automatically measuring liquid level height and liquid level height measuring method |
| CN112986333A (en) * | 2021-02-07 | 2021-06-18 | 浙江工业大学 | Device for measuring dissolved oxygen and improving measurement stability in variable distance mode |
| CN113548740A (en) * | 2021-09-22 | 2021-10-26 | 南通绿盟电子科技有限公司 | Intelligent sewage separation device assisted by Internet of things |
| CN114291911A (en) * | 2021-12-20 | 2022-04-08 | 安徽泛湖生态科技股份有限公司 | Sewage aeration control method based on oxygen transfer efficiency |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6290850B1 (en) * | 1997-10-02 | 2001-09-18 | Suez-Lyonnaise Des Eaux | Method for controlling aeration systems of biological tanks treating waste water |
| CN201882971U (en) * | 2010-11-04 | 2011-06-29 | 美舒环保科技（北京）有限公司 | Accurate aeration control system for aerobic activated sludge reactor |
| KR101534244B1 (en) * | 2014-07-28 | 2015-07-07 | (주) 에코센스 | Power control system for aeration tank using floating type wireless sensing apparatus for off gas |
| CN106430662A (en) * | 2016-11-30 | 2017-02-22 | 尚川（北京）水务有限公司 | Aeration control system and aeration control method |
| CN211505387U (en) * | 2019-10-31 | 2020-09-15 | 上海市政工程设计研究总院（集团）有限公司 | Online monitoring device of translational self-floating aeration system |
-
2019
- 2019-10-31 CN CN201911056347.7A patent/CN110980940B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6290850B1 (en) * | 1997-10-02 | 2001-09-18 | Suez-Lyonnaise Des Eaux | Method for controlling aeration systems of biological tanks treating waste water |
| CN201882971U (en) * | 2010-11-04 | 2011-06-29 | 美舒环保科技（北京）有限公司 | Accurate aeration control system for aerobic activated sludge reactor |
| KR101534244B1 (en) * | 2014-07-28 | 2015-07-07 | (주) 에코센스 | Power control system for aeration tank using floating type wireless sensing apparatus for off gas |
| CN106430662A (en) * | 2016-11-30 | 2017-02-22 | 尚川（北京）水务有限公司 | Aeration control system and aeration control method |
| CN211505387U (en) * | 2019-10-31 | 2020-09-15 | 上海市政工程设计研究总院（集团）有限公司 | Online monitoring device of translational self-floating aeration system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112010436A (en) * | 2020-08-25 | 2020-12-01 | 广州众行环保科技有限公司 | Method for accurately controlling dissolved oxygen in sewage treatment process |
| CN112079457A (en) * | 2020-08-25 | 2020-12-15 | 东南大学 | Aeration system capable of automatically measuring liquid level height and liquid level height measuring method |
| CN112010436B (en) * | 2020-08-25 | 2021-03-30 | 广州众行环保科技有限公司 | Method for accurately controlling dissolved oxygen in sewage treatment process |
| CN112986333A (en) * | 2021-02-07 | 2021-06-18 | 浙江工业大学 | Device for measuring dissolved oxygen and improving measurement stability in variable distance mode |
| CN113548740A (en) * | 2021-09-22 | 2021-10-26 | 南通绿盟电子科技有限公司 | Intelligent sewage separation device assisted by Internet of things |
| CN113548740B (en) * | 2021-09-22 | 2021-11-23 | 南通绿盟电子科技有限公司 | Intelligent sewage separation device assisted by Internet of things |
| CN114291911A (en) * | 2021-12-20 | 2022-04-08 | 安徽泛湖生态科技股份有限公司 | Sewage aeration control method based on oxygen transfer efficiency |
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