CN114249415A - Precise aeration device and method - Google Patents

Precise aeration device and method Download PDF

Info

Publication number
CN114249415A
CN114249415A CN202111578040.0A CN202111578040A CN114249415A CN 114249415 A CN114249415 A CN 114249415A CN 202111578040 A CN202111578040 A CN 202111578040A CN 114249415 A CN114249415 A CN 114249415A
Authority
CN
China
Prior art keywords
value
dissolved oxygen
oxygen concentration
aeration
mean
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111578040.0A
Other languages
Chinese (zh)
Other versions
CN114249415B (en
Inventor
王佳伟
袁星
李烨
孟晓宇
焦二龙
樊鹏超
蒋奇海
孙冀垆
张达飞
刘垚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Drainage Group Co Ltd
Original Assignee
Beijing Drainage Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Drainage Group Co Ltd filed Critical Beijing Drainage Group Co Ltd
Priority to CN202111578040.0A priority Critical patent/CN114249415B/en
Publication of CN114249415A publication Critical patent/CN114249415A/en
Application granted granted Critical
Publication of CN114249415B publication Critical patent/CN114249415B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00—Aeration of stretches of water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/001—Upstream control, i.e. monitoring for predictive control
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/03—Pressure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/22—O2
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/38—Gas flow rate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/42—Liquid level
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Activated Sludge Processes (AREA)

Abstract

The invention discloses a precise aeration device, which comprises: each biological tank comprises at least one aeration tank, a first electric regulating valve is arranged at the water inlet end of each biological tank, and an ammonia nitrogen concentration detector is arranged at the water outlet end of each biological tank; the main water inlet pipe is connected with the plurality of biological ponds and is provided with a water inlet flow meter; the online dissolved oxygen meters are respectively arranged in the aeration tanks; the air blower is connected with the aeration tanks through a plurality of air pipes, each air pipe is provided with a second electric regulating valve and a gas flowmeter, and an air outlet of the air blower is provided with a pressure transmitter; the controller is connected with the first electric regulating valve, the ammonia nitrogen concentration detector, the water inlet flowmeter, the online dissolved oxygen meter, the blower, the second electric regulating valve, the gas flowmeter and the pressure transmitter; can carry out accurate regulation to inflow, air-blower pressure and aeration rate simultaneously, keep the stability of dissolved oxygen concentration in the biological pond.

Description

Precise aeration device and method
Technical Field
The invention belongs to the technical field of aeration, and particularly relates to a precise aeration device and a precise aeration method.
Background
With the continuous improvement of the water quality requirement of effluent water of a sewage treatment plant, the upgrading and reconstruction of the water plant are urgent, wherein the quality of dissolved oxygen control influences the quality of the denitrification and dephosphorization effect of the biological denitrification and dephosphorization process. The control of dissolved oxygen has direct relation with the water inlet load, the adjustment of an air supply valve and the operation condition of a blower, and how to deal with the relation among load balance, pressure adjustment and the control of the dissolved oxygen in a single biological tank directly influences the operation effect of the aeration system. At present, the existing aeration device is difficult to realize the precise control of aeration.
Disclosure of Invention
The invention aims to provide a precise aeration device and a precise aeration method aiming at the defects in the prior art, wherein the device can precisely adjust the water inflow, the pressure of a blower and the aeration quantity by monitoring a first electric regulating valve, an ammonia nitrogen concentration detector, a water inflow flowmeter, an online dissolved oxygen meter, the blower, a second electric regulating valve, a gas flowmeter and a pressure transmitter, and simultaneously keep the concentration of dissolved oxygen in a biological pond stable.
In order to achieve the above object, the present invention provides a precise aeration apparatus, comprising:
each biological tank comprises at least one aeration tank, a first electric regulating valve is arranged at the water inlet end of each biological tank, and an ammonia nitrogen concentration detector is arranged at the water outlet end of each biological tank;
the main water inlet pipe is connected with the plurality of biological ponds, and a water inlet flow meter is arranged on the main water inlet pipe;
a plurality of online dissolved oxygen meters which are respectively arranged in the aeration tanks;
the air blower is connected with the aeration tanks through a plurality of air pipes, each air pipe is provided with a second electric regulating valve and a gas flowmeter, and an air outlet of the air blower is provided with a pressure transmitter;
the controller is connected with the first electric regulating valve, the ammonia nitrogen concentration detector, the water inlet flowmeter, the online dissolved oxygen meter, the blower, the second electric regulating valve, the gas flowmeter and the pressure transmitter.
Optionally, a water distribution channel is arranged at the upstream of the biological pond, and the main water inlet pipe is connected to the water distribution channel.
Optionally, each of the biological ponds further comprises at least one non-aerated pond.
Optionally, the controller comprises a blower control unit for controlling an inlet and outlet guide vane opening of the blower.
The invention also provides a precise aeration method based on the precise aeration device, which comprises the following steps:
setting a mean value set value of the dissolved oxygen concentration of the aeration tank, a pressure value of an initial blower, a mean value set value of the opening degree of a second electric regulating valve and a set value of the ammonia nitrogen concentration of effluent;
respectively obtaining the mean value of the dissolved oxygen concentration of aeration tanks in different biological tanks, and adjusting the opening of a first electric adjusting valve according to the mean value of the dissolved oxygen concentration and the mean value setting value of the dissolved oxygen concentration of the aeration tanks;
acquiring a mean value of the opening degree of a second electric regulating valve, and regulating the pressure value of the initial blower according to the mean value of the dissolved oxygen concentration, the mean value of the opening degree of the second electric regulating valve, the mean value of the dissolved oxygen concentration of the aeration tank and the mean value of the opening degree of the second electric regulating valve to obtain a blower pressure correction value;
acquiring an actual value of the effluent ammonia nitrogen concentration, and adjusting a mean value set value of the dissolved oxygen concentration of the aeration tank according to the actual value of the effluent ammonia nitrogen concentration and the set value of the effluent ammonia nitrogen concentration to obtain a corrected value of the dissolved oxygen concentration of the aeration tank;
and adjusting the opening degree of the second electric adjusting valve according to the corrected value of the dissolved oxygen concentration of the aeration tank and the actual dissolved oxygen concentration values of the aeration tanks in different biological tanks.
Optionally, the separately obtaining the mean dissolved oxygen concentrations of the aeration tanks in the different biological tanks includes:
respectively obtaining the mean value of the dissolved oxygen concentration of aeration tanks in different biological tanks within a set time length before a preset time point;
the aeration tank is close to the water outlet end of the biological tank.
Optionally, a plurality of preset time points are set, and a mean value of dissolved oxygen concentration of the aeration tank, a pressure value of an initial blower, a mean value of opening degree of a second electric regulating valve, and a set value of ammonia nitrogen concentration of effluent water are set at each preset time point.
Optionally, the adjusting the opening degree of the first electric adjusting valve according to the mean dissolved oxygen concentration and the set value of the mean dissolved oxygen concentration of the aeration tank comprises:
calculating a first difference value between the mean value of the dissolved oxygen concentration and a set value of the mean value of the dissolved oxygen concentration of the aeration tank;
and comparing the first difference value with a first threshold value, and when the first difference value is not within the first threshold value range, adjusting the opening degree of the first electric regulating valve until the first difference value is within the first threshold value range.
Optionally, the adjusting the initial blower pressure value according to the mean dissolved oxygen concentration value, the mean second electric regulating valve opening value, the mean aeration tank dissolved oxygen concentration value setting value, and the mean second electric regulating valve opening value setting value to obtain a blower pressure correction value includes:
calculating a second difference value between the set value of the mean value of the dissolved oxygen concentration of the aeration tank and the mean value of the dissolved oxygen concentration;
calculating a third difference value between the set value of the opening mean value of the second electric regulating valve and the opening mean value of the second electric regulating valve;
comparing the second difference value with a second threshold value, comparing the third difference value with a third threshold value, and when the second difference value is greater than an upper limit of the second threshold value and the third difference value is less than a lower limit of the third threshold value, taking a sum of the initial blower pressure value and a set pressure increase value as the blower pressure correction value;
when the second difference is less than a lower limit of the second threshold and the third difference is greater than an upper limit of the third threshold, taking a difference between the initial blower pressure value and a set pressure reduction value as the blower pressure correction value.
Optionally, the adjusting the mean value of the dissolved oxygen concentration of the aeration tank according to the actual value of the ammonia nitrogen concentration of the effluent and the set value of the ammonia nitrogen concentration of the effluent to obtain the corrected value of the dissolved oxygen concentration of the aeration tank comprises:
calculating a fourth difference value between the actual value of the effluent ammonia nitrogen concentration and the set value of the effluent ammonia nitrogen concentration;
comparing the fourth difference value with a fourth threshold value, and maintaining the mean value of the dissolved oxygen concentration of the aeration tank when the fourth difference value is within the fourth threshold value;
when the fourth difference is larger than the upper limit of the fourth threshold, taking the sum of the set value of the mean dissolved oxygen concentration of the aeration tank and the set value of the increase of the dissolved oxygen concentration as the corrected value of the dissolved oxygen concentration of the aeration tank;
when the fourth difference is smaller than the lower limit of the fourth threshold, taking the difference between the set value of the mean dissolved oxygen concentration of the aeration tank and the set value of the reduction of the dissolved oxygen concentration as the corrected value of the dissolved oxygen concentration of the aeration tank;
the adjusting the opening degree of the second electric adjusting valve according to the corrected value of the dissolved oxygen concentration of the aeration tank and the actual dissolved oxygen concentration value of the aeration tank in different biological tanks comprises the following steps:
respectively calculating the difference value between the actual dissolved oxygen concentration value of the aeration tank in different biological tanks and the corrected value of the dissolved oxygen concentration of the aeration tank;
calculating the required aeration amount of the aeration tanks in different biological tanks by a PID algorithm according to the difference value between the actual dissolved oxygen concentration value of the aeration tank in different biological tanks and the corrected value of the dissolved oxygen concentration of the aeration tank;
calculating a fifth difference value between the actual air inflow of the aeration tanks in different biological tanks and the required aeration amount of the aeration tanks in different biological tanks;
and comparing the fifth difference value with a fifth threshold value, and when the fifth difference value is not in the range of the fifth threshold value, adjusting the opening degree of the second electric regulating valve until the fifth difference value is in the range of the fifth threshold value.
The invention provides a precise aeration device and a precise aeration method, which have the beneficial effects that:
1. the device can accurately regulate the water inflow, the pressure of the blower and the aeration quantity simultaneously through monitoring the first electric regulating valve, the ammonia nitrogen concentration detector, the water inflow flowmeter, the online dissolved oxygen meter, the blower, the second electric regulating valve, the gas flowmeter and the pressure transmitter, and keep the concentration of the dissolved oxygen in the biological tank stable;
2. the method simultaneously keeps the dissolved oxygen concentration in the biological tank stable through three aspects of regulation, wherein the first aspect is to regulate the total water inflow according to the dissolved oxygen concentration mean value and the dissolved oxygen concentration mean value set value of the aeration tank; correcting the initial blower pressure value according to the mean value of the dissolved oxygen concentration, the mean value of the opening of the second electric regulating valve, the mean value set value of the dissolved oxygen concentration of the aeration tank and the mean value set value of the opening of the second electric regulating valve to obtain a blower pressure correction value; the third aspect is that the mean value of the dissolved oxygen concentration of the aeration tank is corrected according to the actual value of the ammonia nitrogen concentration of the effluent and the set value of the ammonia nitrogen concentration of the effluent to obtain the corrected value of the dissolved oxygen concentration of the aeration tank, and then the aeration rate of the aeration tank is adjusted according to the corrected value of the dissolved oxygen concentration of the aeration tank and the mean value of the dissolved oxygen concentration; through the common adjustment of the three aspects, the precise aeration is realized, and the sewage treatment efficiency and effect are provided.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 shows a schematic structural diagram of a precise aeration apparatus according to an embodiment of the present invention.
Fig. 2 shows a flow diagram of a precision aeration method according to an embodiment of the present invention.
Description of reference numerals:
1. a biological pond; 2. an aeration tank; 3. a first electric control valve; 4. an ammonia nitrogen concentration detector; 5. a main water inlet pipe; 6. a water inlet flow meter; 7. an online dissolved oxygen instrument; 8. a blower; 9. an air tube; 10. a second electric control valve; 11. a gas flow meter; 12. a pressure transmitter; 13. a water distribution channel; 14. a non-aeration tank.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, the present invention provides a precise aeration apparatus, comprising:
the system comprises a plurality of biological tanks 1, wherein each biological tank 1 comprises at least one aeration tank 2, a first electric regulating valve 3 is arranged at the water inlet end of each biological tank 1, and an ammonia nitrogen concentration detector 4 is arranged at the water outlet end of each biological tank 1;
the main water inlet pipe 5 is connected with the plurality of biological ponds 1, and a water inlet flow meter 6 is arranged on the main water inlet pipe 5;
a plurality of online dissolved oxygen meters 7 respectively arranged in the plurality of aeration tanks 2;
the air blower 8 is connected with the aeration tanks 2 through a plurality of air pipes 9, each air pipe 9 is provided with a second electric regulating valve 10 and a gas flowmeter 11, and an air outlet of the air blower 8 is provided with a pressure transmitter 12;
and the controller is connected with the first electric regulating valve 3, the ammonia nitrogen concentration detector 4, the water inlet flow meter 6, the online dissolved oxygen meter 7, the blower 8, the second electric regulating valve 10, the gas flow meter 11 and the pressure transmitter 12.
Specifically, sewage enters a plurality of biological tanks 1 through a main water inlet pipe 5, and a water inlet flow meter 6 is used for metering the total water inflow; in one example, sewage enters 4 biological tanks 1, each biological tank being provided with 2 aeration tanks 2; each inlet of the biological pond 1 is provided with a first electric regulating valve 3 for controlling the water amount entering the biological pond 1; each aeration tank 2 in each biological tank 1 is provided with 1 online dissolved oxygen meter 7 for measuring the concentration of dissolved oxygen in the aeration tank 2; a second electric control valve 10 is arranged on the air pipe 9 entering each aeration tank 2 and is used for controlling the flow of the air entering the aeration tank 2; a gas flow meter 11 is arranged on the gas pipe 9 entering each aeration tank 2 and is used for measuring the gas flow entering the aeration tank 2; 4 blowers 8 are configured, and a pressure transmitter 12 is arranged on a main gas outlet pipeline of the blowers 8 and used for measuring the pressure of the main gas pipeline; a controller is configured, signals of a water inlet flow meter 6, a pressure transmitter 12, an online dissolved oxygen meter 7 of each biological pond 1, a gas flow meter 11, a first electric regulating valve 3, a second electric regulating valve 10 and an ammonia nitrogen concentration detector 4 are transmitted to the controller, the controller outputs pressure signals to an air blower 8, respectively outputs control signals of each valve to each valve, controls the running state of each air blower 8 through the pressure signals, and controls the opening of each valve through the control signals of the valves; and then through the monitoring to first electrical control valve 3, ammonia nitrogen concentration detector 4, inflow flowmeter 6, online dissolved oxygen appearance 7, air-blower 8, second electrical control valve 10, gas flowmeter 11, pressure transmitter 12, carry out accurate regulation to inflow, air-blower pressure and aeration rate simultaneously, keep the stability of dissolved oxygen concentration in biological pond 1.
Optionally, a distribution channel 13 is provided upstream of the biological pond 1, and the main water inlet pipe 5 is connected to the distribution channel 13.
Specifically, sewage enters the distribution channel 13 from the main water inlet pipe 5, and enters each biological pond 1 through the distribution channel 13.
Optionally, each biological pond 1 also includes at least one non-aerated pond 14.
In one example, there are one non-aeration tank 14 and two aeration tanks 2 in each biological tank 1.
Optionally, the controller comprises a blower control unit for controlling the inlet and outlet guide vane opening of the blower 8.
Specifically, the blower control unit can receive the pressure signal, and further control the opening of the inlet and outlet guide vanes of the plurality of blowers 8.
As shown in fig. 2, the present invention further provides a precise aeration method, based on the above precise aeration apparatus, the method comprising:
setting a mean value set value of the dissolved oxygen concentration of the aeration tank, a pressure value of an initial blower, a mean value set value of the opening degree of a second electric regulating valve and a set value of the ammonia nitrogen concentration of effluent;
respectively obtaining the mean value of the dissolved oxygen concentration of aeration tanks in different biological tanks, and adjusting the opening of a first electric adjusting valve according to the mean value of the dissolved oxygen concentration and the mean value set value of the dissolved oxygen concentration of the aeration tanks;
acquiring the mean value of the opening degree of a second electric regulating valve, and regulating the pressure value of an initial blower according to the mean value of the dissolved oxygen concentration, the mean value of the opening degree of the second electric regulating valve, the mean value of the dissolved oxygen concentration of the aeration tank and the mean value of the opening degree of the second electric regulating valve to obtain a pressure correction value of the blower;
acquiring an actual value of the effluent ammonia nitrogen concentration, and adjusting a mean value set value of the dissolved oxygen concentration of the aeration tank according to the actual value of the effluent ammonia nitrogen concentration and an effluent ammonia nitrogen concentration set value to obtain a dissolved oxygen concentration correction value of the aeration tank;
and adjusting the opening degree of the second electric adjusting valve according to the corrected value of the dissolved oxygen concentration of the aeration tank and the actual dissolved oxygen concentration values of the aeration tanks in different biological tanks.
Specifically, based on the above-mentioned precise aeration device, the method simultaneously maintains the stability of the dissolved oxygen concentration in the biological tank by three aspects of adjustment, namely, the first aspect is to adjust the total water inflow according to the dissolved oxygen concentration mean value and the dissolved oxygen concentration mean value set value of the aeration tank; correcting the initial blower pressure value according to the mean value of the dissolved oxygen concentration, the mean value of the opening of the second electric regulating valve, the mean value set value of the dissolved oxygen concentration of the aeration tank and the mean value set value of the opening of the second electric regulating valve to obtain a blower pressure correction value; the third aspect is that the mean value of the dissolved oxygen concentration of the aeration tank is corrected according to the actual value of the ammonia nitrogen concentration of the effluent and the set value of the ammonia nitrogen concentration of the effluent to obtain the corrected value of the dissolved oxygen concentration of the aeration tank, and then the aeration quantity of the aeration tank is adjusted according to the corrected value of the dissolved oxygen concentration of the aeration tank and the actual dissolved oxygen concentration values of the aeration tanks in different biological tanks; through the common adjustment of the three aspects, the precise aeration is realized, and the sewage treatment efficiency and effect are provided.
Optionally, the respectively obtaining the mean values of the dissolved oxygen concentrations of the aeration tanks in the different biological tanks includes:
respectively obtaining the mean value of the dissolved oxygen concentration of aeration tanks in different biological tanks within a set time length before a preset time point;
the aeration tank is close to the water outlet end of the biological tank.
Specifically, as each biological tank can be provided with a plurality of aeration tanks, when the method is executed and the mean value of the dissolved oxygen concentration of each aeration tank is calculated, the dissolved oxygen concentration data in the aeration tank close to the water outlet end of the biological tank in each biological tank is taken for calculation, so that the accuracy of aeration regulation and control can be improved; when the dissolved oxygen concentration mean values of a plurality of aeration tanks are calculated, the dissolved oxygen concentration mean value of each aeration tank is obtained by averaging the dissolved oxygen concentration values in a set time length before a preset time point; and calculating the mean value of the dissolved oxygen concentration only once in the time range between two adjacent preset time points.
Optionally, a plurality of preset time points are set, and a mean value set value of the dissolved oxygen concentration of the aeration tank, a pressure value of an initial blower, a mean value set value of the opening degree of a second electric regulating valve and a set value of the ammonia nitrogen concentration of effluent water are set at each preset time point.
Specifically, the plurality of preset time points are several times in 24 days, and the specific setting of the preset time points can be determined according to actual requirements and working conditions; meanwhile, according to actual requirements and working conditions, the set value of the mean value of the dissolved oxygen concentration of the aeration tank, the set value of the pressure value of the initial blower, the set value of the mean value of the opening degree of the second electric regulating valve and the set value of the ammonia nitrogen concentration of effluent water at each preset time point can be the same or different; different aeration tank dissolved oxygen concentration mean value set values, initial blower pressure values, second electric regulating valve opening mean value set values and effluent ammonia nitrogen concentration set values are set at each preset time point, and therefore the aeration control system can further accord with actual working conditions, and aeration regulation and control are flexible and accurate.
Optionally, the adjusting the opening degree of the first electric adjusting valve according to the mean value of the dissolved oxygen concentration and the mean value of the dissolved oxygen concentration of the aeration tank set value comprises:
calculating a first difference value between the mean value of the dissolved oxygen concentration and a set value of the mean value of the dissolved oxygen concentration of the aeration tank;
and comparing the first difference value with a first threshold value, and when the first difference value is not within the first threshold value range, adjusting the opening degree of the first electric regulating valve until the first difference value is within the first threshold value range.
Specifically, when a certain preset time point is reached, the mean value of the dissolved oxygen concentration in the aeration tanks of the biological tanks in the previous 1 hour can be obtained, the mean value of the dissolved oxygen concentration in the aeration tanks of the biological tanks and the set value of the mean value of the dissolved oxygen concentration in the aeration tanks are compared, a first difference value is recorded as delta A, a first threshold value is set as +/-n% A, the opening degree of a first electric control valve on each biological tank is automatically adjusted, and the first difference value is ensured to be within the range of the first threshold value; the value range of the first threshold value can be set according to actual requirements.
Optionally, the adjusting the initial blower pressure value according to the mean dissolved oxygen concentration value, the mean opening value of the second electric regulating valve, the mean dissolved oxygen concentration value of the aeration tank, and the mean opening value of the second electric regulating valve to obtain the blower pressure correction value includes:
calculating a second difference value of the mean value of the dissolved oxygen concentration of the aeration tank and the mean value of the dissolved oxygen concentration;
calculating a third difference value between the set value of the opening mean value of the second electric regulating valve and the opening mean value of the second electric regulating valve;
comparing the second difference value with a second threshold value, comparing the third difference value with a third threshold value, and when the second difference value is larger than the upper limit of the second threshold value and the third difference value is smaller than the lower limit of the third threshold value, taking the sum of the initial blower pressure value and the set pressure increase value as a blower pressure correction value;
and when the second difference value is smaller than the lower limit of the second threshold value and the third difference value is larger than the upper limit of the third threshold value, taking the difference value between the initial blower pressure value and the set pressure reduction value as a blower pressure correction value.
Specifically, when a certain time point is reached, the set pressure value of the initial blower is set as P, the time period set before the time point is obtained and can be 1 hour, and the mean value of the dissolved oxygen concentration is set as D; averaging the opening degrees of the second electric control valves corresponding to the aeration tanks in different biological tanks to obtain the mean value of the opening degrees of the second electric control valves, setting the mean value as W, wherein the opening degrees of the second electric control valves are real-time values, and in the embodiment, the second electric control valves corresponding to the aeration tanks in different biological tanks for calculating the mean value of the opening degrees of the second electric control valves are the second electric control valves connected to the aeration tanks close to the water outlet ends of the biological tanks; setting the mean value of the dissolved oxygen concentration of the aeration tank as Da, and subtracting the Da and the D to obtain a difference value delta D, namely a second difference value, and setting a second threshold value as +/-n% D; the value range of the second threshold value can be set according to actual requirements. Setting the mean value of the opening degree of the second electric regulating valve as Wa, subtracting Wa from W to obtain a difference value delta W, namely a third difference value, setting a third threshold value as +/-n% W, wherein the value range of the third threshold value can be set according to actual requirements. Simultaneously comparing the second difference with the second threshold value and comparing the third difference with the third threshold value, if the second difference is larger than the upper limit of the second threshold value and the third difference is smaller than the lower limit of the third threshold value, increasing the set pressure P by delta P1, wherein delta P1 is the set pressure increase value; if the second difference is smaller than the lower limit of the second threshold value and the third difference is larger than the upper limit of the third threshold value, the set pressure P is decreased by Δ P2, and Δ P2 is the set pressure decrease value; otherwise, the set pressure P is kept unchanged. And transmitting the corrected blower pressure correction value to a blower control unit (MCP), and automatically adjusting the opening of guide vanes of each blower by the blower control unit according to the received blower pressure correction value so that the gas pressure in the gas pipe reaches the blower pressure correction value.
Optionally, the step of adjusting the mean value of the dissolved oxygen concentration of the aeration tank according to the actual value of the ammonia nitrogen concentration of the effluent and the set value of the ammonia nitrogen concentration of the effluent to obtain the corrected value of the dissolved oxygen concentration of the aeration tank comprises the following steps:
calculating a fourth difference value between the actual value of the ammonia nitrogen concentration of the outlet water and the set value of the ammonia nitrogen concentration of the outlet water;
comparing the fourth difference value with a fourth threshold value, and keeping the mean value of the dissolved oxygen concentration of the aeration tank when the fourth difference value is within the fourth threshold value;
when the fourth difference value is larger than the upper limit of the fourth threshold value, taking the sum of the set value of the mean value of the dissolved oxygen concentration of the aeration tank and the set value of the increase value of the dissolved oxygen concentration as the corrected value of the dissolved oxygen concentration of the aeration tank;
when the fourth difference is smaller than the lower limit of the fourth threshold, taking the difference between the set value of the mean dissolved oxygen concentration of the aeration tank and the set value of the reduction amplitude of the dissolved oxygen concentration as the corrected value of the dissolved oxygen concentration of the aeration tank;
adjusting the opening degree of the second electric adjusting valve according to the corrected value of the dissolved oxygen concentration of the aeration tank and the actual dissolved oxygen concentration value of the aeration tank in different biological tanks comprises the following steps:
respectively calculating the difference value between the actual dissolved oxygen concentration value of the aeration tank in different biological tanks and the corrected value of the dissolved oxygen concentration of the aeration tank;
calculating the required aeration amount of the aeration tanks in different biological tanks by a PID algorithm according to the difference value between the actual dissolved oxygen concentration value of the aeration tank in different biological tanks and the corrected value of the dissolved oxygen concentration of the aeration tank;
calculating a fifth difference value between the actual air inflow of the aeration tanks in different biological tanks and the required aeration amount of the aeration tanks in different biological tanks;
and comparing the fifth difference value with a fifth threshold value, and when the fifth difference value is not in the range of the fifth threshold value, adjusting the opening degree of the second electric regulating valve until the fifth difference value is in the range of the fifth threshold value.
Specifically, according to the actual value of the effluent ammonia nitrogen concentration measured by an actual effluent ammonia nitrogen concentration instrument and the set value of the effluent ammonia nitrogen concentration, a fourth difference value is calculated and recorded as delta G, a fourth threshold value is set to be +/-n% G, and if the fourth difference value is within the range of the fourth threshold value, the mean value set value of the dissolved oxygen concentration of each aeration tank in each biological tank is kept unchanged; if the fourth difference is greater than the upper limit of the fourth threshold, the aeration tanks in each biological tank are, for example: respectively increasing delta DO1 and delta DO2 to the mean value set values of the dissolved oxygen concentrations of the aeration tanks of the first aeration tank and the second aeration tank to obtain a corrected value of the dissolved oxygen concentration of the aeration tanks; if the fourth difference is smaller than the lower limit of the fourth threshold, respectively reducing the mean value set values of the dissolved oxygen concentrations of the aeration tanks of the first aeration tank and the second aeration tank by delta DO3 and delta DO4 to obtain a dissolved oxygen concentration correction value of the aeration tanks; calculating the required aeration amount of the aeration tanks in different biological tanks through a PID algorithm according to the difference between the actual dissolved oxygen concentration value of the aeration tank in different biological tanks and the corrected value of the dissolved oxygen concentration of the aeration tank, recording the difference as a fifth difference value delta G according to the difference between the actual air inflow of the aeration tank in different biological tanks and the required aeration amount of the aeration tank in different biological tanks, which is obtained by comparing the gas flow measurement of the aeration tank in different biological tanks, setting a fifth threshold value as +/-n% G, and automatically adjusting the opening degree by taking a second electric adjusting valve of the aeration tank in different biological tanks as an execution mechanism until the fifth difference value is within the range of the fifth threshold value.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (10)

1. An accurate aeration apparatus, characterized in that the apparatus comprises:
each biological tank comprises at least one aeration tank, a first electric regulating valve is arranged at the water inlet end of each biological tank, and an ammonia nitrogen concentration detector is arranged at the water outlet end of each biological tank;
the main water inlet pipe is connected with the plurality of biological ponds, and a water inlet flow meter is arranged on the main water inlet pipe;
a plurality of online dissolved oxygen meters which are respectively arranged in the aeration tanks;
the air blower is connected with the aeration tanks through a plurality of air pipes, each air pipe is provided with a second electric regulating valve and a gas flowmeter, and an air outlet of the air blower is provided with a pressure transmitter;
the controller is connected with the first electric regulating valve, the ammonia nitrogen concentration detector, the water inlet flowmeter, the online dissolved oxygen meter, the blower, the second electric regulating valve, the gas flowmeter and the pressure transmitter.
2. The precision aeration apparatus of claim 1, wherein a distribution channel is provided upstream of the biological tank, and the main water inlet pipe is connected to the distribution channel.
3. The precision aeration apparatus of claim 1, wherein each of the biological tanks further comprises at least one non-aeration tank.
4. The precision aeration apparatus of claim 1, wherein the controller comprises a blower control unit for controlling an inlet and outlet guide vane opening of the blower.
5. A precise aeration method based on the precise aeration device according to any one of claims 1 to 4, characterized in that the method comprises the following steps:
setting a mean value set value of the dissolved oxygen concentration of the aeration tank, a pressure value of an initial blower, a mean value set value of the opening degree of a second electric regulating valve and a set value of the ammonia nitrogen concentration of effluent;
respectively obtaining the mean value of the dissolved oxygen concentration of aeration tanks in different biological tanks, and adjusting the opening of a first electric adjusting valve according to the mean value of the dissolved oxygen concentration and the mean value setting value of the dissolved oxygen concentration of the aeration tanks;
acquiring a mean value of the opening degree of a second electric regulating valve, and regulating the pressure value of the initial blower according to the mean value of the dissolved oxygen concentration, the mean value of the opening degree of the second electric regulating valve, the mean value of the dissolved oxygen concentration of the aeration tank and the mean value of the opening degree of the second electric regulating valve to obtain a blower pressure correction value;
acquiring an actual value of the effluent ammonia nitrogen concentration, and adjusting a mean value set value of the dissolved oxygen concentration of the aeration tank according to the actual value of the effluent ammonia nitrogen concentration and the set value of the effluent ammonia nitrogen concentration to obtain a corrected value of the dissolved oxygen concentration of the aeration tank;
and adjusting the opening degree of the second electric adjusting valve according to the corrected value of the dissolved oxygen concentration of the aeration tank and the actual dissolved oxygen concentration values of the aeration tanks in different biological tanks.
6. The precise aeration method according to claim 5, wherein the separately obtaining the mean value of the dissolved oxygen concentration of the aeration tanks in the different biological tanks comprises:
respectively obtaining the mean value of the dissolved oxygen concentration of aeration tanks in different biological tanks within a set time length before a preset time point;
the aeration tank is close to the water outlet end of the biological tank.
7. The precise aeration method according to claim 5, wherein a plurality of preset time points are provided, and a mean value of dissolved oxygen concentration of the aeration tank, a pressure value of an initial blower, a mean value of opening degree of a second electric regulating valve, and a set value of ammonia nitrogen concentration of effluent water are set at each of the preset time points.
8. The precise aeration method according to claim 5, wherein the adjusting the opening degree of the first electrically-operated adjusting valve according to the mean dissolved oxygen concentration and the mean aeration tank dissolved oxygen concentration set value comprises:
calculating a first difference value between the mean value of the dissolved oxygen concentration and a set value of the mean value of the dissolved oxygen concentration of the aeration tank;
and comparing the first difference value with a first threshold value, and when the first difference value is not within the first threshold value range, adjusting the opening degree of the first electric regulating valve until the first difference value is within the first threshold value range.
9. The precise aeration method according to claim 5, wherein the adjusting the initial blower pressure value according to the mean dissolved oxygen concentration value, the mean second motorized valve opening value, the mean aeration tank dissolved oxygen concentration value, and the mean second motorized valve opening value to obtain a blower pressure correction value comprises:
calculating a second difference value between the set value of the mean value of the dissolved oxygen concentration of the aeration tank and the mean value of the dissolved oxygen concentration;
calculating a third difference value between the set value of the opening mean value of the second electric regulating valve and the opening mean value of the second electric regulating valve;
comparing the second difference value with a second threshold value, comparing the third difference value with a third threshold value, and when the second difference value is greater than an upper limit of the second threshold value and the third difference value is less than a lower limit of the third threshold value, taking a sum of the initial blower pressure value and a set pressure increase value as the blower pressure correction value;
when the second difference is less than a lower limit of the second threshold and the third difference is greater than an upper limit of the third threshold, taking a difference between the initial blower pressure value and a set pressure reduction value as the blower pressure correction value.
10. The accurate aeration method according to claim 5, wherein the adjusting the mean value of the dissolved oxygen concentration of the aeration tank according to the actual ammonia nitrogen concentration of the effluent and the ammonia nitrogen concentration of the effluent to obtain the corrected value of the dissolved oxygen concentration of the aeration tank comprises:
calculating a fourth difference value between the actual value of the effluent ammonia nitrogen concentration and the set value of the effluent ammonia nitrogen concentration;
comparing the fourth difference value with a fourth threshold value, and maintaining the mean value of the dissolved oxygen concentration of the aeration tank when the fourth difference value is within the fourth threshold value;
when the fourth difference is larger than the upper limit of the fourth threshold, taking the sum of the set value of the mean dissolved oxygen concentration of the aeration tank and the set value of the increase of the dissolved oxygen concentration as the corrected value of the dissolved oxygen concentration of the aeration tank;
when the fourth difference is smaller than the lower limit of the fourth threshold, taking the difference between the set value of the mean dissolved oxygen concentration of the aeration tank and the set value of the reduction of the dissolved oxygen concentration as the corrected value of the dissolved oxygen concentration of the aeration tank;
the adjusting the opening degree of the second electric adjusting valve according to the corrected value of the dissolved oxygen concentration of the aeration tank and the actual dissolved oxygen concentration value of the aeration tank in different biological tanks comprises the following steps:
respectively calculating the difference value between the actual dissolved oxygen concentration value of the aeration tank in different biological tanks and the corrected value of the dissolved oxygen concentration of the aeration tank;
calculating the required aeration amount of the aeration tanks in different biological tanks by a PID algorithm according to the difference value between the actual dissolved oxygen concentration value of the aeration tank in different biological tanks and the corrected value of the dissolved oxygen concentration of the aeration tank;
calculating a fifth difference value between the actual air inflow of the aeration tanks in different biological tanks and the required aeration amount of the aeration tanks in different biological tanks;
and comparing the fifth difference value with a fifth threshold value, and when the fifth difference value is not in the range of the fifth threshold value, adjusting the opening degree of the second electric regulating valve until the fifth difference value is in the range of the fifth threshold value.
CN202111578040.0A 2021-12-22 2021-12-22 Accurate aeration device and method Active CN114249415B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111578040.0A CN114249415B (en) 2021-12-22 2021-12-22 Accurate aeration device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111578040.0A CN114249415B (en) 2021-12-22 2021-12-22 Accurate aeration device and method

Publications (2)

Publication Number Publication Date
CN114249415A true CN114249415A (en) 2022-03-29
CN114249415B CN114249415B (en) 2023-07-04

Family

ID=80796667

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111578040.0A Active CN114249415B (en) 2021-12-22 2021-12-22 Accurate aeration device and method

Country Status (1)

Country Link
CN (1) CN114249415B (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047925A1 (en) * 1980-09-16 1982-03-24 Linde Aktiengesellschaft Method and apparatus for treating water by means of ozone
JPH05123689A (en) * 1991-11-05 1993-05-21 Toshiba Corp Controlling device in water treatment plant
JP2002086136A (en) * 2000-09-14 2002-03-26 Takuma Co Ltd Device for deoxidizing feed water
CN201694928U (en) * 2010-03-26 2011-01-05 北京城市排水集团有限责任公司 Water inlet adjustable weir control device of sewage treatment plant
CN108585173A (en) * 2018-05-14 2018-09-28 清华大学 The optimal control device and method of sewage treatment plant's blower system energy consumption
CN109205808A (en) * 2018-10-11 2019-01-15 首创爱华(天津)市政环境工程有限公司 A kind of accurate aeration control method based on water outlet ammonia nitrogen and dissolved oxygen
CN109592804A (en) * 2018-12-28 2019-04-09 中原环保股份有限公司 A kind of sewage treatment approach follows excellent accurate aeration method
CN113213646A (en) * 2021-04-29 2021-08-06 北京城市排水集团有限责任公司 Blower control device and control method for sewage treatment system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047925A1 (en) * 1980-09-16 1982-03-24 Linde Aktiengesellschaft Method and apparatus for treating water by means of ozone
JPH05123689A (en) * 1991-11-05 1993-05-21 Toshiba Corp Controlling device in water treatment plant
JP2002086136A (en) * 2000-09-14 2002-03-26 Takuma Co Ltd Device for deoxidizing feed water
CN201694928U (en) * 2010-03-26 2011-01-05 北京城市排水集团有限责任公司 Water inlet adjustable weir control device of sewage treatment plant
CN108585173A (en) * 2018-05-14 2018-09-28 清华大学 The optimal control device and method of sewage treatment plant's blower system energy consumption
CN109205808A (en) * 2018-10-11 2019-01-15 首创爱华(天津)市政环境工程有限公司 A kind of accurate aeration control method based on water outlet ammonia nitrogen and dissolved oxygen
CN109592804A (en) * 2018-12-28 2019-04-09 中原环保股份有限公司 A kind of sewage treatment approach follows excellent accurate aeration method
CN113213646A (en) * 2021-04-29 2021-08-06 北京城市排水集团有限责任公司 Blower control device and control method for sewage treatment system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
水工业市场杂志, 北京：中国环境科学出版社 *

Also Published As

Publication number Publication date
CN114249415B (en) 2023-07-04

Similar Documents

Publication Publication Date Title
CN113213646A (en) Blower control device and control method for sewage treatment system
CN106430662B (en) Aeration control system and method
US8178070B2 (en) Air demand feedback control systems and methods for sulfur recovery units
CN106277383B (en) Aeration control system and method based on oxygen consumption rate tester
CN109607770B (en) Multi-scene self-learning carbon source intelligent adding system and method for denitrification tank
KR101432026B1 (en) Denitrification process and system
CN106277299B (en) Aeration control system and method based on oxygen consumption rate tester
US10635061B2 (en) Method for controlling a process
CN113149242B (en) Dissolved oxygen control device and method for sewage treatment system
CN102863074A (en) Intelligent control method of blast aeration system of municipal sewage plant
CN207792813U (en) Carbon source Intelligent adding system for powered
CN110482687A (en) A kind of accurate aeration method based on automatic control
CN114249415A (en) Precise aeration device and method
CN110862141B (en) Dissolved oxygen self-adaptive control device and method thereof
CN211546081U (en) Dissolved oxygen adaptive control device
WO2018179476A1 (en) Waste water treatment system, device for controlling air supply volume, and method for controlling air supply volume
CN214174904U (en) Intelligent aeration quantity calculation control system for sewage treatment
CN206232477U (en) A kind of dissolved oxygen automatic control system
CN114291911A (en) Sewage aeration control method based on oxygen transfer efficiency
CN216964105U (en) Ammonia water supply regulation control system of ammonia desulphurization system after ultralow emission of flue gas
CN106186381B (en) A kind of aeration control system and aeration control method
CN218130996U (en) Ammonia desulphurization device
JP7406445B2 (en) Air volume control device and air volume control method
CN211813677U (en) Sewage biochemical treatment system
CN113304586A (en) Ammonia water supply regulation control system of ammonia desulphurization system after ultralow emission of flue gas

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant