CN110204067A - A kind of aeration control system and method - Google Patents
A kind of aeration control system and method Download PDFInfo
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- CN110204067A CN110204067A CN201910620544.0A CN201910620544A CN110204067A CN 110204067 A CN110204067 A CN 110204067A CN 201910620544 A CN201910620544 A CN 201910620544A CN 110204067 A CN110204067 A CN 110204067A
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- aeration
- ammonia nitrogen
- dissolved oxygen
- line meter
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- 238000005273 aeration Methods 0.000 title claims abstract description 224
- 238000000034 method Methods 0.000 title claims abstract description 34
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 175
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 162
- 239000001301 oxygen Substances 0.000 claims abstract description 162
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 162
- 239000007789 gas Substances 0.000 claims abstract description 113
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
- 238000013461 design Methods 0.000 claims description 30
- 239000010865 sewage Substances 0.000 claims description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 239000011159 matrix material Substances 0.000 claims description 10
- 238000012937 correction Methods 0.000 claims description 9
- 238000005276 aerator Methods 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 239000010802 sludge Substances 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 5
- 238000002795 fluorescence method Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- 229910021529 ammonia Inorganic materials 0.000 claims 2
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 18
- 230000001276 controlling effect Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 5
- 238000004065 wastewater treatment Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 235000003283 Pachira macrocarpa Nutrition 0.000 description 1
- 241001083492 Trapa Species 0.000 description 1
- 235000014364 Trapa natans Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009165 saligot Nutrition 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- C02F3/006—Regulation methods for biological treatment
-
- 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
- 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
- C02F2209/14—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
- C02F2209/40—Liquid flow rate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- 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)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Activated Sludge Processes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a kind of aeration control system and methods, comprising: water inlet quantifier is located on the water inlet pipe of aerobic tank；First dissolved oxygen in-line meter and the first ammonia nitrogen in-line meter set up the end of the second segment pond body in aerobic tank separately；Second dissolved oxygen in-line meter and the second ammonia nitrogen in-line meter set up the end of the 4th section of pond body in aerobic tank separately；Four gas flowmeters and four electrically operated valves set up separately on four aeration branch pipes；Control device, can each instrument based on the received measured value, dissolved oxygen feedforward and feedback aeration control, feedforward aeration compensation control and ammonia nitrogen aeration compensation control are carried out to the aeration in aerobic tank by control frequency conversion blast apparatus and four electrically operated valves on demand.The system and method solves single dissolved oxygen feedback control and is difficult to cope with water quality and quantity fluctuation and aeration realization stability contorting, while technique is up to standard, realizes system high efficiency stable operation.
Description
Technical field
The present invention relates to sewage treatment field more particularly to a kind of aeration control system and methods.
Background technique
Currently, Urbanization Construction puts more effort due to social development, urban wastewater treatment firm operation enters efficient operation
Phase, sewage treatment are not only limited to handle up to standard, while developing to energy-saving equal directions, respond social energy conservation emission reduction targets.
Urban wastewater treatment is most of based on sanitary sewage, and mature treatment process is AAO, oxidation ditch etc. and emerging MBR
It is generally blast aeration and mechanical aeration Deng, aeration mode, aerating system energy consumption accounting in sewage disposal process is generally super
50% or more is crossed, it is more for aeration energy-saving technical research, it is most of to be adjusted based on dissolved oxygen (DO) feedback control,
But sewage treatment influent quality usually fluctuates larger, often there is big delay in control system, lagging influence is larger, causes system
Regulating effect is bad；With the development of automatic control Process Control System, the problems such as feedforward control reply water quantity and quality fluctuates is added, but
It is that there is also chemical requirement (COD), ammonia nitrogen (NH of intaking in the case of variation water quality3) instrument can not real-time response, instrument fault
Rate is higher, and the reliability of instrument is affected, and causing control system, there are deviations.
Therefore, how to provide it is a kind of can stability contorting aeration, with to meet sewage treatment energy-saving up to standard with technique
Under the premise of it is required that, making the operation of sewage treatment plant's efficient stable is problem to be solved.
Summary of the invention
Based on the problems of prior art, the object of the present invention is to provide a kind of aeration control system and method, energy
It solves existing by single dissolved oxygen feedback control aeration, it is difficult to cope with water quality and quantity fluctuation and realize aeration stability contorting
Problem.
The purpose of the present invention is what is be achieved through the following technical solutions:
Embodiment of the present invention provides a kind of aeration control system, for being divided into the dirt of four sections of pond bodies in simple sequence aerobic tank
Water treatment system, wherein the first aeration branch pipe, the second aeration branch pipe, third aeration branch pipe and the 4th are respectively set in four sections of pond bodies
Aeration branch pipe, each aeration branch pipe are connect through aeration main line with frequency conversion blast apparatus, comprising:
It intakes quantifier, the first dissolved oxygen in-line meter, the second dissolved oxygen in-line meter, the first ammonia nitrogen in-line meter, the
Two ammonia nitrogen in-line meters, first gas flowmeter, second gas flowmeter, third gas flowmeter, the 4th gas flowmeter,
One electrically operated valve, the second electrically operated valve, third electrically operated valve, the 4th electrically operated valve and control device；Wherein,
The water inlet quantifier is located on the water inlet pipe of the aerobic tank, is electrically connected with the control device；
The first dissolved oxygen in-line meter and the first ammonia nitrogen in-line meter are respectively provided in the aerobic tank
The end of two sections of pond bodies, the first dissolved oxygen in-line meter and the first ammonia nitrogen in-line meter are electric with the control device
Gas connection；
The second dissolved oxygen in-line meter and the second ammonia nitrogen in-line meter are respectively provided in the aerobic tank
The end of four sections of pond bodies, the second dissolved oxygen in-line meter and the second ammonia nitrogen in-line meter are electric with the control device
Gas connection；
The first gas flowmeter, second gas flowmeter, third gas flowmeter and the 4th gas flowmeter difference
It is located in the aerobic tank in one section of pond body to intracorporal first aeration branch pipe to the front end of the 4th aeration branch pipe in four sections of ponds, it is described
First gas flowmeter, second gas flowmeter, third gas flowmeter and the 4th gas flowmeter with the control device
Electrical connection；
First electrically operated valve, the second electrically operated valve, third electrically operated valve and the 4th electrically operated valve are respectively provided at described
In aerobic tank in one section of pond body to intracorporal first aeration branch pipe to the front end of the 4th aeration branch pipe in four sections of ponds, described first is electronic
Valve, the second electrically operated valve, third electrically operated valve and the 4th electrically operated valve are electrically connected with the control device；
The control device, the quantifier that can intake based on the received, the first dissolved oxygen in-line meter, the second dissolved oxygen are online
Instrument, the first ammonia nitrogen in-line meter, the second ammonia nitrogen in-line meter, first gas flowmeter, second gas flowmeter, third gas
The measured value of flowmeter and the 4th gas flow, by controlling the frequency conversion blast apparatus and the first electrically operated valve, second electronic
Valve, third electrically operated valve and the 4th electrically operated valve carry out feedforward on demand to the aeration in the aerobic tank and feed back aeration compensation
Control, feedforward aeration compensation control and ammonia nitrogen aeration compensation control.
Embodiment of the present invention also provides a kind of aeration control method, is used in aeration control system of the present invention,
The following steps are included:
Control device is intake quantifier, the first dissolved oxygen in-line meter, the second dissolved oxygen in-line meter, based on the received
One ammonia nitrogen in-line meter, the second ammonia nitrogen in-line meter, first gas flowmeter, second gas flowmeter, third gas flowmeter
With the measured value of the 4th gas flow, by controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, the
Three electrically operated valves and the 4th electrically operated valve the aeration in the aerobic tank is carried out on demand dissolved oxygen feedforward with feedback aeration control,
Feedforward aeration compensation control and ammonia nitrogen aeration compensation control；Wherein,
The dissolved oxygen feedforward and feedback aeration control are as follows:
First segment pond body to the 4th section of pond body in the aerobic tank, which is set, according to the design parameter of aerobic tank keeps sludge not
The maximum aeration air quantity of sedimentation and minimum aeration air quantity；
The setting value for setting the first dissolved oxygen in-line meter according to the setting value of the first dissolved oxygen in-line meter and is somebody's turn to do
The deviation of the measured value of first dissolved oxygen in-line meter passes through PID tandem feedback control second gas flowmeter adjustment described second
Electrically operated valve adjusts the aeration air quantity of second segment pond body in the aerobic tank, and according to the aeration air quantity of the second segment pond body
The aeration air quantity for adjusting the first electrically operated valve control first segment pond body is equal with the aeration air quantity of the second segment pond body；
The setting value that the first ammonia nitrogen in-line meter is set according to influent ammonium concentration, according to the first ammonia nitrogen in-line meter
Setting value and the difference of measured value of the first ammonia nitrogen in-line meter find out the changing value of ammonia nitrogen, by setting the adjustment period according to
The changing value of ammonia nitrogen distributes automatically and adjusts the setting value of the second dissolved oxygen in-line meter, according to the online instrument of the second dissolved oxygen
The deviation of the measured value of the setting value of table and the second dissolved oxygen in-line meter passes through the 4th gas flow of PID tandem feedback control
Meter adjusts the 4th electrically operated valve and adjusts to the aeration air quantity of the 4th section of pond body in the aerobic tank, and according to the described 4th
The aeration of the aeration air quantity and the 4th section of pond body of the aeration air quantity adjustment third electrically operated valve control third section pond body of Duan Chiti
Air quantity is equal；
The feedforward aeration compensation control are as follows:
When the flow of inlet water Q of the aerobic tank is more than normal inflow predetermined amplitude, feedover is aerated compensation, and feedforward is mended
Repay tolerance are as follows: Oq=Y × QIf×(QIt is real/QIf-1)；
Wherein: Oq: feedforward compensation tolerance；
Y: design aeration air quantity and design treatment water ratio；
QIf: design flow of inlet water；
QIt is real: practical flow of inlet water；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the
The feedforward compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by four electrically operated valves；
The ammonia nitrogen aeration compensation control are as follows:
The setting value that the second ammonia nitrogen in-line meter is set according to Chinese effluent standard, when the online instrument of the second ammonia nitrogen
The measured value of table is more than the setting value of the second ammonia nitrogen in-line meter, carries out feedback aeration compensation, feedback compensation tolerance are as follows: Of=
b×QIt is real×Nc×K0/EA/0.28；
Wherein: Of: for feedback compensation tolerance；
B: oxygen amount needed for oxidation ammonia nitrogen, value 4.57；
QIt is real: for practical flow of inlet water；
Nc: for the measured value of the second ammonia nitrogen in-line meter and the setting value difference of the second ammonia nitrogen in-line meter；
EA: for aerator coefficient of oxygen utilization；
K0: for aerobic quantity correction coefficient；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the
The feedback compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by four electrically operated valves.
As seen from the above technical solution provided by the invention, aeration control system provided in an embodiment of the present invention and side
Method, it has the advantage that:
It is online by the way that the first dissolved oxygen in-line meter, the second dissolved oxygen are respectively set in the aerobic tank for being divided into four sections of pond bodies
Instrument, the first ammonia nitrogen in-line meter, the second ammonia nitrogen in-line meter, and water inlet quantifier is set in aerobic tank water inlet pipe, so that
Control device can receive the first dissolved oxygen in-line meter, the second dissolved oxygen in-line meter, the first ammonia nitrogen in-line meter, the second ammonia nitrogen
The measured value of in-line meter and water inlet quantifier, and then the intracorporal dissolved oxygen in pond, ammonia nitrogen value are respectively segmented according to aerobic tank, it is able to achieve
It is feedovered using dissolved oxygen and feeds back aeration control mode, using dissolved oxygen and ammonia nitrogen as control variable, to aerobic tank tolerance
It is allocated adjusting；And situation is fluctuated according to flow of inlet water and implements feedforward aeration compensation, it is exceeded for aerobic tank water outlet ammonia nitrogen
Carry out ammonia nitrogen aeration compensation；By introducing the feedforward control dissolved oxygen of ammonia nitrogen while in conjunction with dissolved oxygen feedback control, and pass through
Feedforward and feedback are aerated compensation, solve single dissolved oxygen feedback control and are difficult to cope with water quality and quantity fluctuation and be aerated to realize stable control
System, while technique is up to standard, realizes system high efficiency stable operation.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the composition schematic diagram of aeration control system provided in an embodiment of the present invention；
Fig. 2 is aeration control method flow diagram provided in an embodiment of the present invention；
It is respectively marked in figure are as follows: 1- electrical control cabinet；11- electrical cabinet facility switching；12- relay；13- connecting terminal；2-
Self-control cabinet；21-PLC power supply；22- input/output module；23- meter switch；24- industrial personal computer；31- the first ammonia nitrogen in-line meter；
32- the second ammonia nitrogen in-line meter；41- the first dissolved oxygen in-line meter；42- the second dissolved oxygen in-line meter；51- first gas stream
Meter；52- second gas flowmeter；53- third gas flowmeter；The 4th gas flowmeter of 54-；The first electrically operated valve of 61-；
The second electrically operated valve of 62-；63- third electrically operated valve；The 4th electrically operated valve of 64-；7- feed water flow meter；8- frequency conversion blast apparatus.
Specific embodiment
Below with reference to particular content of the invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
Belong to protection scope of the present invention.The content being not described in detail in the embodiment of the present invention belongs to professional and technical personnel in the field
The well known prior art.
As shown in Figure 1, the embodiment of the present invention provides a kind of aeration control system, it is suitable for control urban wastewater treatment firm drum
Wind aeration unit ammonia nitrogen and dissolved oxygen concentration can be improved aerating system stability contorting level, realize that fan energy use reduces, should
System is for being divided into the sewage disposal system of four sections of pond bodies in aerobic tank, wherein the first aeration branch is respectively set in four sections of pond bodies
Pipe, the second aeration branch pipe, third aeration branch pipe and the 4th aeration branch pipe, each aeration branch pipe are set through aeration main line with frequency conversion air blast
Standby connection, comprising:
It intakes quantifier, the first dissolved oxygen in-line meter, the second dissolved oxygen in-line meter, the first ammonia nitrogen in-line meter, the
Two ammonia nitrogen in-line meters, first gas flowmeter, second gas flowmeter, third gas flowmeter, the 4th gas flowmeter,
One electrically operated valve, the second electrically operated valve, third electrically operated valve, the 4th electrically operated valve and control device；Wherein,
The water inlet quantifier is located on the water inlet pipe of the aerobic tank, is electrically connected with the control device；
The first dissolved oxygen in-line meter and the first ammonia nitrogen in-line meter are respectively provided in the aerobic tank
The end of two sections of pond bodies, the first dissolved oxygen in-line meter and the first ammonia nitrogen in-line meter are electric with the control device
Gas connection；
The second dissolved oxygen in-line meter and the second ammonia nitrogen in-line meter are respectively provided in the aerobic tank
The end of four sections of pond bodies, the second dissolved oxygen in-line meter and the second ammonia nitrogen in-line meter are electric with the control device
Gas connection；
The first gas flowmeter, second gas flowmeter, third gas flowmeter and the 4th gas flowmeter difference
It is located in the aerobic tank in one section of pond body to intracorporal first aeration branch pipe to the front end of the 4th aeration branch pipe in four sections of ponds, it is described
First gas flowmeter, second gas flowmeter, third gas flowmeter and the 4th gas flowmeter with the control device
Electrical connection；
First electrically operated valve, the second electrically operated valve, third electrically operated valve and the 4th electrically operated valve are respectively provided at described
In aerobic tank in one section of pond body to intracorporal first aeration branch pipe to the front end of the 4th aeration branch pipe in four sections of ponds, described first is electronic
Valve, the second electrically operated valve, third electrically operated valve and the 4th electrically operated valve are electrically connected with the control device；
The control device, the quantifier that can intake based on the received, the first dissolved oxygen in-line meter, the second dissolved oxygen are online
Instrument, the first ammonia nitrogen in-line meter, the second ammonia nitrogen in-line meter, first gas flowmeter, second gas flowmeter, third gas
The measured value of flowmeter and the 4th gas flow, by controlling the frequency conversion blast apparatus and the first electrically operated valve, second electronic
Valve, third electrically operated valve and the 4th electrically operated valve carry out dissolved oxygen feedforward on demand to the aeration in the aerobic tank and expose with feedback
Gas control system, feedforward aeration compensation control and ammonia nitrogen aeration compensation control.
In above system, control device is the quantifier that can intake based on the received, the first dissolved oxygen in-line meter, second molten
Solve oxygen in-line meter, the first ammonia nitrogen in-line meter, the second ammonia nitrogen in-line meter, first gas flowmeter, second gas flowmeter,
The measured value of third gas flowmeter and the 4th gas flow, by control the frequency conversion blast apparatus and the first electrically operated valve,
Second electrically operated valve, third electrically operated valve and the 4th electrically operated valve carry out dissolved oxygen feedforward to the aeration in the aerobic tank on demand
In feedback aeration control, feedforward aeration compensation control and ammonia nitrogen aeration compensation control,
The dissolved oxygen feedforward and feedback aeration control are as follows:
First segment pond body to the 4th section of pond body in the aerobic tank, which is set, according to the design parameter of aerobic tank keeps sludge not
The maximum aeration air quantity of sedimentation and minimum aeration air quantity；Wherein, maximum aeration air quantity is in order not to allow air blower to adjust frequency too
Greatly, minimum aeration air quantity does not sink mud for aerobic tank, and maximum aeration air quantity and minimum aeration air quantity define that air blower carries out
The range of adjusting；
Setting the setting value of the first dissolved oxygen in-line meter, (set value calculation, in practice can basis as 0.5~1mg/L
Experience setting), according to the measured value of the setting value of the first dissolved oxygen in-line meter and the first dissolved oxygen in-line meter
Deviation controls second gas flowmeter by PID tandem feedback control and adjusts second electrically operated valve in the aerobic tank the
The aeration air quantity of two sections of pond bodies is adjusted, and is adjusted first electrically operated valve according to the aeration air quantity of the second segment pond body and controlled
The aeration air quantity of first segment pond body is equal with the aeration air quantity of the second segment pond body；
The setting value that the first ammonia nitrogen in-line meter is set according to influent ammonium concentration, according to the first ammonia nitrogen in-line meter
Setting value and the difference of measured value of the first ammonia nitrogen in-line meter find out the changing value of ammonia nitrogen, by setting the adjustment period according to
The changing value of ammonia nitrogen distributes automatically and adjusts the setting value of the second dissolved oxygen in-line meter, according to the online instrument of the second dissolved oxygen
The deviation of the measured value of the setting value of table and the second dissolved oxygen in-line meter passes through the 4th gas flow of PID tandem feedback control
Meter adjusts the 4th electrically operated valve and adjusts to the aeration air quantity of the 4th section of pond body in the aerobic tank, and according to the described 4th
The aeration of the aeration air quantity and the 4th section of pond body of the aeration air quantity adjustment third electrically operated valve control third section pond body of Duan Chiti
Air quantity is equal；
The feedforward aeration compensation control are as follows:
When the flow of inlet water Q of the aerobic tank is more than normal inflow predetermined amplitude, feedover is aerated compensation, and feedforward is mended
Repay tolerance are as follows: Oq=Y × QIf×(QIt is real/QIf-1)；
Wherein: Oq: feedforward compensation tolerance；
Y: design aeration air quantity and design treatment water ratio；
QIf: design flow of inlet water；
QIt is real: practical flow of inlet water；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the
The feedforward compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by four electrically operated valves；
The ammonia nitrogen aeration compensation control are as follows:
The setting value that the second ammonia nitrogen in-line meter is set according to Chinese effluent standard, when the online instrument of the second ammonia nitrogen
The measured value of table is more than the setting value of the second ammonia nitrogen in-line meter, carries out feedback aeration compensation, feedback compensation tolerance are as follows: Of=
b×QIt is real×Nc×K0/EA/0.28；
Wherein: Of: for feedback compensation tolerance；
B: oxygen amount needed for oxidation ammonia nitrogen, value 4.57；
QIt is real: for practical flow of inlet water；
Nc: for the measured value of the second ammonia nitrogen in-line meter and the setting value difference of the second ammonia nitrogen in-line meter；
EA: for aerator coefficient of oxygen utilization；
K0: for aerobic quantity correction coefficient, the aerobic quantity correction coefficient is related with water temperature, oxygen equipressure, is calculated according to formula
It obtains, detail formula and explanation are obtained by design manual (design manual or Water And Drainage System Design handbook of such as sewage disposal system)；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the
The feedback compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by four electrically operated valves.
According to frequency conversion air blast described in PID tandem feedback tolerance, feedforward compensation tolerance, ammonia nitrogen feedback compensation tolerance feedback control
Device frequency reaches institute's required airflow.
In above system, dissolved oxygen feedforward adjusts the period according to the variation of ammonia nitrogen by setting with feedback aeration control
The setting value of the second dissolved oxygen in-line meter is distributed and adjusted automatically to value are as follows:
Under aerobic tank steady operational status, the optimum controling range of dissolved oxygen: Δ DO is acquired according to the changing value of ammonia nitrogen
=k × Δ NH3+ b, wherein Δ DO: for the adjustment amount of dissolved oxygen；ΔNH3: for the changing value of ammonia nitrogen；K, b is constant, value
Respectively -1 and 0.5, further, k, b can be determined by test in practice；
Certain section is set by the setting value of the first ammonia nitrogen in-line meter, according to ammonia nitrogen different in the section of setting
Changing value obtains dissolved oxygen adjustment matrix；When automatic running, matrix is adjusted certainly according to the dissolved oxygen according to the changing value of ammonia nitrogen
The dynamic setting value matched and adjust the second dissolved oxygen in-line meter.
In above system, the dissolved oxygen feedforward is with feedback aeration control by the adjustment period set according to the change of ammonia nitrogen
Change value is distributed automatically and is adjusted in the setting value of the second dissolved oxygen in-line meter, and the adjustment period set is 0.5h.
In above system, feed water flow meter is using water inlet electromagnetic flowmeter；
The first ammonia nitrogen in-line meter and the second ammonia nitrogen in-line meter are all made of electrode method ammonia nitrogen in-line meter；
The first dissolved oxygen in-line meter and the second dissolved oxygen in-line meter are all made of fluorescence method dissolved oxygen in-line meter；
The first gas flowmeter, second gas flowmeter, third gas flowmeter and the 4th gas flowmeter are adopted
Use thermal type gas quality flow meter；
First electrically operated valve, the second electrically operated valve, third electrically operated valve and the 4th electrically operated valve are all made of electronic water chestnut
Shape valve；
The frequency conversion blast apparatus uses air suspension frequency conversion blast apparatus.
Preferably, above-mentioned control device uses self-control cabinet, is equipped with PLC power supply, input/output module, instrument in self-control cabinet and opens
Pass and industrial personal computer etc..Electrical control is carried out to frequency conversion blast apparatus and uses electrical control cabinet, is equipped with electrical cabinet in electrical control cabinet
Facility switching, relay and connecting terminal etc..
Referring to fig. 2, the embodiment of the present invention also provides a kind of aeration control method, in above-mentioned aeration control system,
The following steps are included:
Control device is intake quantifier, the first dissolved oxygen in-line meter, the second dissolved oxygen in-line meter, based on the received
One ammonia nitrogen in-line meter, the second ammonia nitrogen in-line meter, first gas flowmeter, second gas flowmeter, third gas flowmeter
With the measured value of the 4th gas flow, by controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, the
Three electrically operated valves and the 4th electrically operated valve the aeration in the aerobic tank is carried out on demand dissolved oxygen feedforward with feedback aeration control,
Feedforward aeration compensation control and ammonia nitrogen aeration compensation control；Wherein,
The dissolved oxygen feedforward and feedback aeration control are as follows:
First segment pond body to the 4th section of pond body in the aerobic tank, which is set, according to the design parameter of aerobic tank keeps sludge not
The maximum aeration air quantity of sedimentation and minimum aeration air quantity；
The setting value for setting the first dissolved oxygen in-line meter according to the setting value of the first dissolved oxygen in-line meter and is somebody's turn to do
The deviation of the measured value of first dissolved oxygen in-line meter passes through PID tandem feedback control second gas flowmeter adjustment described second
Electrically operated valve adjusts the aeration air quantity of second segment pond body in the aerobic tank, and according to the aeration air quantity of the second segment pond body
The aeration air quantity for adjusting the first electrically operated valve control first segment pond body is equal with the aeration air quantity of the second segment pond body；
It (in practice, can be according to water inlet and reflux according to the setting value that influent ammonium concentration sets the first ammonia nitrogen in-line meter
Amount calculate and is obtained), according to the measured value of the setting value of the first ammonia nitrogen in-line meter and the first ammonia nitrogen in-line meter
Difference find out the changing value of ammonia nitrogen, distributed automatically by the adjustment period of setting according to the changing value of ammonia nitrogen and adjust the second dissolved oxygen
The setting value of in-line meter, according to the reality of the setting value of the second dissolved oxygen in-line meter and the second dissolved oxygen in-line meter
The deviation of measured value adjusts the 4th electrically operated valve in the aerobic tank by the 4th gas flowmeter of PID tandem feedback control
The 4th section of pond body aeration air quantity adjust, and according to the aeration air quantity of the 4th section of pond body adjust third electrically operated valve control
The aeration air quantity of third section pond body is equal with the 4th section of aeration air quantity of pond body；
The feedforward aeration compensation control are as follows:
When the flow of inlet water Q of the aerobic tank is more than normal inflow predetermined amplitude, feedover is aerated compensation, and feedforward is mended
Repay tolerance are as follows: Oq=Y × QIf×(QIt is real/QIf-1)；
Wherein: Oq: feedforward compensation tolerance；
Y: design aeration air quantity and design treatment water ratio；
QIf: design flow of inlet water；
QIt is real: practical flow of inlet water；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the
The feedforward compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by four electrically operated valves；
The ammonia nitrogen aeration compensation control are as follows:
The setting value that the second ammonia nitrogen in-line meter is set according to Chinese effluent standard, when the online instrument of the second ammonia nitrogen
The measured value of table is more than the setting value of the second ammonia nitrogen in-line meter, carries out feedback aeration compensation, feedback compensation tolerance are as follows: Of=
b×QIt is real×Nc×K0/EA/0.28；
Wherein: Of: for feedback compensation tolerance；
B: oxygen amount needed for oxidation ammonia nitrogen, value 4.57；
QIt is real: for practical flow of inlet water；
Nc: for the measured value of the second ammonia nitrogen in-line meter and the setting value difference of the second ammonia nitrogen in-line meter；
EA: for aerator coefficient of oxygen utilization；
K0: for aerobic quantity correction coefficient, the aerobic quantity correction coefficient is related with water temperature, oxygen equipressure, is calculated according to formula
It obtains, detail formula is obtained with explanation by the corresponding design manual of sewage disposal system；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the
The feedback compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by four electrically operated valves.
The dissolved oxygen feedforward of the above method adjusts the period according to the changing value of ammonia nitrogen by setting with feedback aeration control
Automatically distribute and adjust the setting value of the second dissolved oxygen in-line meter are as follows:
Under aerobic tank steady operational status, the optimum controling range of dissolved oxygen: Δ DO is acquired according to the changing value of ammonia nitrogen
=k × Δ NH3+ b, wherein Δ DO: for the optimum controling range of dissolved oxygen；ΔNH3: for the changing value of ammonia nitrogen；K, b is normal
Number, value are respectively -1 and 0.5, and further, k, b can be determined by test in practice；
Certain section is set by the setting value of the first ammonia nitrogen in-line meter, according to ammonia nitrogen different in the section of setting
Changing value obtains dissolved oxygen adjustment matrix；When automatic running, matrix is adjusted certainly according to the dissolved oxygen according to the changing value of ammonia nitrogen
The dynamic setting value matched and adjust the second dissolved oxygen in-line meter.
The dissolved oxygen feedforward of the above method adjusts the period according to the changing value of ammonia nitrogen by setting with feedback aeration control
The adjustment period set in the automatic setting value distributed and adjust the second dissolved oxygen in-line meter is 0.5h.
Aeration control system and method for the invention carries out aeration control based on ammonia nitrogen and dissolved oxygen (DO), passes through setting
In-line meter and control device are feedovered using dissolved oxygen and feed back aeration control mode, using dissolved oxygen and ammonia nitrogen as control
Variable processed is allocated adjusting to aerobic tank tolerance.Situation is fluctuated according to flow of inlet water simultaneously and implements feedforward compensation, for aerobic
Pond is discharged the exceeded progress ammonia nitrogen aeration compensation of ammonia nitrogen；By introducing ammonia nitrogen (NH3) feedforward control DO simultaneously with DO feedback control
In conjunction with, and by feedforward and feedback aeration compensation, it solves single DO feedback control and is difficult to cope with water quality and quantity fluctuation and be aerated real
Existing stability contorting, while technique is up to standard, realizes system high efficiency stable operation.
With reference to the accompanying drawings and examples, the present invention is specifically described in further detail.
The embodiment of the present invention provides a kind of aeration control system, suitable for the sewage treatment process of such as AAO etc., stability contorting
It is aerated air quantity, i.e., according to aerobic tank real-time DO, NH3, feedback control is aerated air quantity, according to inflow and effluent quality oscillation compensation
Tolerance, specific as follows:
(1) referring to Fig. 1, four Duan Chiti are divided into single group aerobic tank, in second segment pond body end, the 4th section of pond body end
First, second dissolved oxygen in-line meter, respectively 1#DO, 2#DO, second segment pond body end, the 4th section of pond body end are installed respectively
First, second ammonia nitrogen in-line meter, respectively 1#NH are installed respectively3、2#NH3；Pacify respectively in first segment pond body to the 4th section of pond body
First to fourth aeration branch pipe is filled, the inlet of each aeration branch pipe is respectively mounted gas flowmeter (i.e. first gas flowmeter,
Two gas flowmeters, third gas flowmeter and the 4th gas flow) and electrically operated valve it is (i.e. the first electrically operated valve, second electronic
Valve, third electrically operated valve and the 4th electrically operated valve)；Frequency conversion blast apparatus is adjusted large-minded by conversion system or guide vane
It is small；
The maximum aeration air quantity and minimum aeration air quantity that the single hop pond body in aerobic tank is set according to design parameter, guarantee single
The intracorporal sludge in section pond does not settle；
Referring to fig. 2, the feedforward of (2) dissolved oxygen and feedback aeration control:
Setting the concentration of 1#DO is certain numerical value as setting value (such as 1mg/L requires adjustment in real time according to control), according to
The setting value of 1#DO and the deviation of measured value adjust the aeration air quantity of first segment pond body by PID tandem feedback control, setting the
The aeration air quantity of two sections of pond bodies is equal with the aeration air quantity of first segment pond body, and by the aeration air quantity to the aeration of second segment pond body
Air quantity is adjusted；
(3) 1#NH is set3It is certain numerical value as setting value, according to real-time 1#NH3Setting value and the difference of measured value acquire
NH3Changing value Δ NH3, according to NH3Changing value distributes the setting value of adjustment 2#DO automatically；
DO adjustment amount Δ DO is acquired based on experience value, by 1#NH3Setting value is set as different sections, not under stable operation
Same NH3The optimum controling range of DO: Δ DO=k × Δ NH is acquired under the conditions of changing value3+ b, k, b are constant, can pass through test
It determines；
Different NH3DO adjustment matrix is obtained under set interval；When automated system operation, according to Δ NH3Size is adjusted according to DO
Matrix Auto-matching and the setting value for adjusting 2#DO；NH3, DO setting value adjustment the period be 0.5h；
Pass through the aeration wind of the 4th section of pond body of PID tandem feedback control according to the setting value of 2#DO and the deviation of measured value
Amount, the aeration air quantity for setting third section pond body is equal with the 4th section of aeration air quantity of pond body, and by the aeration air quantity to third section
The aeration air quantity of pond body is adjusted；
(4) feedforward aeration compensation control:
Flow of inlet water Q is more than certain amplitude (such as 15%, can set), starting feedforward aeration compensation, feedforward compensation tolerance are as follows:
Oq=Y × QIf×(QIt is real/QIf-1)；
Wherein: Oq: for feedforward compensation tolerance value；
Y: design aeration air quantity and design treatment water ratio；
QIf: to design flow of inlet water；
QIt is real: for practical flow of inlet water；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the
The feedforward compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by four electrically operated valves；
(5) ammonia nitrogen feedback aeration compensation control:
Set 2#NH3It is certain numerical value as setting value, as the 2#NH of the real time measure3Measured value be more than its setting value after, into
The feedback aeration compensation of row ammonia nitrogen, feedback compensation tolerance are as follows: Of=b × QIt is real×Nc×K0/EA/0.28；
Of: for ammonia nitrogen feedback compensation tolerance
B: oxygen amount needed for oxidation ammonia nitrogen, value 4.57；
QIt is real: for practical flow of inlet water；
Nc: for 2#NH3Measured value and setting value difference；
EA: for aerator coefficient of oxygen utilization (constant given for aerator producer)；
K0: for aerobic quantity correction coefficient, the aerobic quantity correction coefficient is related with water temperature, oxygen equipressure, is calculated according to formula
It obtains, detail formula and explanation are obtained by design manual；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the
The feedback compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by four electrically operated valves.
Control system and method for the invention at least has the advantages that and is exposed by being then based on ammonia nitrogen and DO control
Gas can be widely used in urban wastewater treatment aeration unit；The control method uses biochemical treatment using technology Calculation as foundation
Blast aeration system has and can be widely applied；Using aerobic tank subregion, later half area is controlled with ammonia nitrogen value and is aerated air quantity, solves water quality
Fluctuation causes the delay of system to adjust problem；Aerobic tank ammonia nitrogen is relatively stable, and ammonia nitrogen measuring accuracy is high, solves the big delay of great fluctuation process
Influence to system；The control system is applied in 50,000 tpds of engineering, can reduce by 10% or more aeration energy consumption, and can be with
Operation manipulation strength is greatly reduced；
Embodiment
The present embodiment provides a kind of aeration control system, applied process operation situation are as follows: certain urban wastewater treatment firm,
50,000 tpds of scale, core process uses AAO technique, it is desirable that the water outlet side's of arriving at a place discharge standard A standard, NH3Water outlet is
1mg/L；Biochemistry pool is divided into 2 series, and each series aerobic tank is divided into 4 aeration gallerys；
As shown in Figure 1, the aeration control system be equipped with electrical control cabinet 1, self-control cabinet 2, electrical cabinet have facility switching 11, after
Electric appliance 12, connecting terminal 13 etc., self-control cabinet (i.e. control device) is interior PLC module, PLC power supply 21, input/output module 22, instrument
Table switch 23 and industrial personal computer 24 etc.；
In the second gallery end (i.e. second segment pond body) of simple sequence aerobic tank and the 4th gallery end (i.e. the 4th Duan Chi
Body) 2 pieces of electrode method ammonia nitrogen in-line meters (i.e. the first ammonia nitrogen in-line meter 31 and the second ammonia nitrogen in-line meter 32), same are installed respectively
When 2 pieces of fluorescence method DO in-line meters (the first dissolved oxygen in-line meter 41 and the second dissolved oxygen in-line meter 42) are installed, it is each to expose
Thermal type gas quality flow meter (i.e. first gas flowmeter 51, second gas flowmeter 52, third are mounted on gas branch pipe
Gas flowmeter 53 and the 4th gas flow 54), motor-driven diamond valve (i.e. the first electrically operated valve is mounted on each aeration branch pipe
61, the second electrically operated valve 62, third electrically operated valve 63 and the 4th electrically operated valve 64)；
Water power magnetic flowmeter (i.e. feed water flow meter 7) is installed on into the water inlet pipe of aerobic tank；
The equipment and instrument are connected by power supply line, signal wire and electrical cabinet, self-control cabinet and are controlled by PLC module；Work
Control machine and self-control cabinet communication connection；
Frequency conversion blast apparatus 8 uses air suspension air blower, and band control cabinet is, it can be achieved that remote variable frequency controls；
Above equipment, instrument are installed and established communication connection, control program is imported into PLC module；
Referring to fig. 2, steps are as follows for aeration real-time control:
Influent quality information (newly-built water factory is by design water quality) analysis, the water inlet of average of the whole year water quality are collected by control device
NH3Concentration is 35mg/L, is considered according to factors such as reflux dilutions, sets the setting value of the first ammonia nitrogen in-line meter 31 as 3.5mg/
L sets the setting value of the first dissolved oxygen in-line meter 41 as 1mg/L；
42 control range of different sections and the second dissolved oxygen in-line meter is set according to the first ammonia nitrogen in-line meter 31, is debugged
Value k, b is respectively 1 and 0.5, obtains the ammonia nitrogen Δ NH under this control range3Respectively 2mg/L, 1mg/L, 0mg/L, 0.5mg/
L, under -1mg/L, -2mg/L, -2.5mg/L, DO adjusted value be -1.5mg/L, -0.5mg/L, 0mg/L, 1mg/L, 1.5mg/L,
2.5mg/L, 3mg/L, set the control minimum value of the second dissolved oxygen in-line meter 42 as 1.5mg/L, maximum value 3.5mg/L；
Continuing 30min according to the amount of inlet water (simple sequence) that feed water flow meter 7 confirms is more than 1198m3/ h is lower than
1010m3Starting feedforward aeration compensation when/h, feedforward compensation tolerance are Oq=6.5 × 1042 × (QIt is real/ 1042-1), by feedforward compensation
Tolerance is divided equally to first to fourth aeration gallery (i.e. first to fourth section of pond body) in aerobic tank；
The setting value of the second ammonia nitrogen in-line meter 32 at water outlet is set as 0.5mg/L, the second ammonia nitrogen in-line meter 32
Measured value be more than setting value when starting ammonia nitrogen feedback aeration compensation, feedback compensation tolerance be Of=4.57 × QIt is real×Nc×
1.759/0.25/0.28, feedback compensation tolerance is divided equally to first to fourth aeration gallery (i.e. first to fourth in aerobic tank
Duan Chiti)；
During system is run, the second ammonia nitrogen in-line meter 32 remains essentially in 0.4mg/L height, water shock wave
System energy quick response carries out tolerance compensation after dynamic, when there is abnormal failure and can not be automatically repaired in main instrument numerical value, then system
Constant aeration mode is switched to, system is avoided to be controlled by error signal.By operation in 3 months, which compared
Stable controls aerating system, saves fan energy use 11.5% compared to the same period, reasonable control aeration water outlet refers to
Mark effect is obvious, and system can be substantially stable within discharge standard A.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (8)
1. a kind of aeration control system, which is characterized in that for being divided into the sewage treatment system of four sections of pond bodies in simple sequence aerobic tank
System, wherein the first aeration branch pipe, the second aeration branch pipe, third aeration branch pipe and the 4th aeration branch are respectively set in four sections of pond bodies
Pipe, each aeration branch pipe are connect through aeration main line with frequency conversion blast apparatus, comprising:
Water inlet quantifier, the first dissolved oxygen in-line meter, the second dissolved oxygen in-line meter, the first ammonia nitrogen in-line meter, the second ammonia
Nitrogen in-line meter, first gas flowmeter, second gas flowmeter, third gas flowmeter, the 4th gas flowmeter, the first electricity
Movable valve, the second electrically operated valve, third electrically operated valve, the 4th electrically operated valve and control device；Wherein,
The water inlet quantifier is located on the water inlet pipe of the aerobic tank, is electrically connected with the control device；
The first dissolved oxygen in-line meter and the first ammonia nitrogen in-line meter are respectively provided at the second segment in the aerobic tank
The end of pond body, the first dissolved oxygen in-line meter and the first ammonia nitrogen in-line meter electrically connect with the control device
It connects；
The second dissolved oxygen in-line meter and the second ammonia nitrogen in-line meter are respectively provided at the 4th section in the aerobic tank
The end of pond body, the second dissolved oxygen in-line meter and the second ammonia nitrogen in-line meter electrically connect with the control device
It connects；
The first gas flowmeter, second gas flowmeter, third gas flowmeter and the 4th gas flowmeter are respectively provided at
In the aerobic tank in one section of pond body to intracorporal first aeration branch pipe to the front end of the 4th aeration branch pipe in four sections of ponds, described first
Gas flowmeter, second gas flowmeter, third gas flowmeter and the 4th gas flowmeter are electrical with the control device
Connection；
First electrically operated valve, the second electrically operated valve, third electrically operated valve and the 4th electrically operated valve are respectively provided at described aerobic
In pond in one section of pond body to intracorporal first aeration branch pipe to the front end of the 4th aeration branch pipe in four sections of ponds, first motor-driven valve
Door, the second electrically operated valve, third electrically operated valve and the 4th electrically operated valve are electrically connected with the control device；
The control device, the quantifier that can intake based on the received, the first dissolved oxygen in-line meter, the online instrument of the second dissolved oxygen
Table, the first ammonia nitrogen in-line meter, the second ammonia nitrogen in-line meter, first gas flowmeter, second gas flowmeter, third gas stream
The measured value of meter and the 4th gas flow, by controlling the frequency conversion blast apparatus and the first electrically operated valve, the second motor-driven valve
Door, third electrically operated valve and the 4th electrically operated valve carry out dissolved oxygen feedforward on demand to the aeration in the aerobic tank and are aerated with feedback
Control, feedforward aeration compensation control and ammonia nitrogen aeration compensation control.
2. aeration control system according to claim 1, which is characterized in that the control device, can based on the received into
Water quantifier, the first dissolved oxygen in-line meter, the second dissolved oxygen in-line meter, the first ammonia nitrogen in-line meter, the second ammonia nitrogen are online
Instrument, first gas flowmeter, second gas flowmeter, third gas flowmeter and the 4th gas flow measured value, pass through
Control the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the 4th electrically operated valve pair
Aeration in the aerobic tank carries out dissolved oxygen feedforward on demand and is aerated with feedback aeration control, feedforward aeration compensation control and ammonia nitrogen
In compensation control,
The dissolved oxygen feedforward and feedback aeration control are as follows:
Setting first segment pond body to the 4th section of pond body in the aerobic tank according to the design parameter of aerobic tank keeps sludge not settle
Maximum aeration air quantity and minimum aeration air quantity；
The setting value for setting the first dissolved oxygen in-line meter, according to the setting value of the first dissolved oxygen in-line meter and this first
The deviation of the measured value of dissolved oxygen in-line meter is electronic by PID tandem feedback control second gas flowmeter adjustment described second
Valve adjusts the aeration air quantity of second segment pond body in the aerobic tank, and is adjusted according to the aeration air quantity of the second segment pond body
The aeration air quantity of the first electrically operated valve control first segment pond body is equal with the aeration air quantity of the second segment pond body；
The setting value that the first ammonia nitrogen in-line meter is set according to influent ammonium concentration, according to setting for the first ammonia nitrogen in-line meter
The difference of the measured value of definite value and the first ammonia nitrogen in-line meter finds out the changing value of ammonia nitrogen, by the adjustment period of setting according to ammonia nitrogen
Changing value distribute and adjust the setting value of the second dissolved oxygen in-line meter automatically, according to the second dissolved oxygen in-line meter
The deviation of the measured value of setting value and the second dissolved oxygen in-line meter passes through the 4th gas flowmeter tune of PID tandem feedback control
Whole 4th electrically operated valve adjusts the aeration air quantity of the 4th section of pond body in the aerobic tank, and according to the 4th Duan Chi
The aeration air quantity of the aeration air quantity and the 4th section of pond body of the aeration air quantity adjustment third electrically operated valve control third section pond body of body
It is equal；
The feedforward aeration compensation control are as follows:
When the flow of inlet water Q of the aerobic tank is more than normal inflow predetermined amplitude, feedover is aerated compensation, feedforward compensation gas
Amount are as follows: Oq=Y × QIf×(QIt is real/QIf-1)；
Wherein: Oq: feedforward compensation tolerance；
Y: design aeration air quantity and design treatment water ratio；
QIf: design flow of inlet water；
QIt is real: practical flow of inlet water；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the 4th electricity
The feedforward compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by movable valve；
The ammonia nitrogen aeration compensation control are as follows:
The setting value that the second ammonia nitrogen in-line meter is set according to Chinese effluent standard, when the second ammonia nitrogen in-line meter
Measured value is more than the setting value of the second ammonia nitrogen in-line meter, carries out feedback aeration compensation, feedback compensation tolerance are as follows: Of=b ×
QIt is real×Nc×K0/EA/0.28；
Wherein: Of: for feedback compensation tolerance；
B: oxygen amount needed for oxidation ammonia nitrogen, value 4.57；
QIt is real: for practical flow of inlet water；
Nc: for the measured value of the second ammonia nitrogen in-line meter and the setting value difference of the second ammonia nitrogen in-line meter；
EA: for aerator coefficient of oxygen utilization；
K0: for aerobic quantity correction coefficient；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the 4th electricity
The feedback compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by movable valve.
3. aeration control system according to claim 2, which is characterized in that the dissolved oxygen feedforward and feedback aeration control
In, it is distributed automatically by the adjustment period of setting according to the changing value of ammonia nitrogen and adjusts the setting value of the second dissolved oxygen in-line meter
Are as follows:
Under aerobic tank steady operational status, the optimum controling range of dissolved oxygen is acquired according to the changing value of ammonia nitrogen: Δ DO=k ×
ΔNH3+ b, wherein Δ DO: for the adjustment amount of dissolved oxygen；ΔNH3: for the changing value of ammonia nitrogen；K, b is constant, value difference
For -1 and 0.5；
Certain section is set by the setting value of the first ammonia nitrogen in-line meter, is changed according to ammonia nitrogen different in the section of setting
Value obtains dissolved oxygen adjustment matrix；When automatic running, automatic, matrix is adjusted according to the dissolved oxygen according to the changing value of ammonia nitrogen
Match and adjust the setting value of the second dissolved oxygen in-line meter.
4. aeration control system according to claim 2 or 3, which is characterized in that the dissolved oxygen feedforward is aerated with feedback
Control is distributed automatically according to the changing value of ammonia nitrogen by the adjustment period of setting and adjusts the setting of the second dissolved oxygen in-line meter
In value, the adjustment period set is 0.5h.
5. aeration control system according to claim 1 or 2, which is characterized in that the feed water flow meter is using water inlet electricity
Magnetic flowmeter；
The first ammonia nitrogen in-line meter and the second ammonia nitrogen in-line meter are all made of electrode method ammonia nitrogen in-line meter；
The first dissolved oxygen in-line meter and the second dissolved oxygen in-line meter are all made of fluorescence method dissolved oxygen in-line meter；
The first gas flowmeter, second gas flowmeter, third gas flowmeter and the 4th gas flowmeter are all made of heat
Formula gas mass flow meter；
First electrically operated valve, the second electrically operated valve, third electrically operated valve and the 4th electrically operated valve are all made of motor-driven diamond valve
Door；
The frequency conversion blast apparatus uses air suspension frequency conversion blast apparatus.
6. a kind of aeration control method, which is characterized in that be used in aeration control system described in claim 1, including following
Step:
Control device is intake quantifier, the first dissolved oxygen in-line meter, the second dissolved oxygen in-line meter, the first ammonia based on the received
Nitrogen in-line meter, the second ammonia nitrogen in-line meter, first gas flowmeter, second gas flowmeter, third gas flowmeter and
The measured value of four gas flows, by controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electricity
Movable valve and the 4th electrically operated valve carry out dissolved oxygen feedforward and feedback aeration control, feedforward to the aeration in the aerobic tank on demand
Aeration compensation control and ammonia nitrogen aeration compensation control；Wherein,
The dissolved oxygen feedforward and feedback aeration control are as follows:
Setting first segment pond body to the 4th section of pond body in the aerobic tank according to the design parameter of aerobic tank keeps sludge not settle
Maximum aeration air quantity and minimum aeration air quantity；
The setting value for setting the first dissolved oxygen in-line meter, according to the setting value of the first dissolved oxygen in-line meter and this first
The deviation of the measured value of dissolved oxygen in-line meter is electronic by PID tandem feedback control second gas flowmeter adjustment described second
Valve adjusts the aeration air quantity of second segment pond body in the aerobic tank, and is adjusted according to the aeration air quantity of the second segment pond body
The aeration air quantity of the first electrically operated valve control first segment pond body is equal with the aeration air quantity of the second segment pond body；
The setting value that the first ammonia nitrogen in-line meter is set according to influent ammonium concentration, according to setting for the first ammonia nitrogen in-line meter
The difference of the measured value of definite value and the first ammonia nitrogen in-line meter finds out the changing value of ammonia nitrogen, by the adjustment period of setting according to ammonia nitrogen
Changing value distribute and adjust the setting value of the second dissolved oxygen in-line meter automatically, according to the second dissolved oxygen in-line meter
The deviation of the measured value of setting value and the second dissolved oxygen in-line meter passes through the 4th gas flowmeter tune of PID tandem feedback control
Whole 4th electrically operated valve adjusts the aeration air quantity of the 4th section of pond body in the aerobic tank, and according to the 4th Duan Chi
The aeration air quantity of the aeration air quantity and the 4th section of pond body of the aeration air quantity adjustment third electrically operated valve control third section pond body of body
It is equal；
The feedforward aeration compensation control are as follows:
When the flow of inlet water Q of the aerobic tank is more than normal inflow predetermined amplitude, feedover is aerated compensation, feedforward compensation gas
Amount are as follows: Oq=Y × QIf×(QIt is real/QIf-1)；
Wherein: Oq: feedforward compensation tolerance；
Y: design aeration air quantity and design treatment water ratio；
QIf: design flow of inlet water；
QIt is real: practical flow of inlet water；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the 4th electricity
The feedforward compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by movable valve；
The ammonia nitrogen aeration compensation control are as follows:
The setting value that the second ammonia nitrogen in-line meter is set according to Chinese effluent standard, when the second ammonia nitrogen in-line meter
Measured value is more than the setting value of the second ammonia nitrogen in-line meter, carries out feedback aeration compensation, feedback compensation tolerance are as follows: Of=b ×
QIt is real×Nc×K0/EA/0.28；
Wherein: Of: for feedback compensation tolerance；
B: oxygen amount needed for oxidation ammonia nitrogen, value 4.57；
QIt is real: for practical flow of inlet water；
Nc: for the measured value of the second ammonia nitrogen in-line meter and the setting value difference of the second ammonia nitrogen in-line meter；
EA: for aerator coefficient of oxygen utilization；
K0: for aerobic quantity correction coefficient；
By controlling the frequency conversion blast apparatus and the first electrically operated valve, the second electrically operated valve, third electrically operated valve and the 4th electricity
The feedback compensation tolerance is divided equally and is compensated to the first segment pond body in the aerobic tank to the 4th Duan Chiti by movable valve.
7. aeration control method according to claim 6, which is characterized in that the dissolved oxygen feedforward and feedback of the method expose
In gas control system, is distributed automatically by the adjustment period of setting according to the changing value of ammonia nitrogen and adjust setting for the second dissolved oxygen in-line meter
Definite value are as follows:
Under aerobic tank steady operational status, the optimum controling range of dissolved oxygen is acquired according to the changing value of ammonia nitrogen: Δ DO=k ×
ΔNH3+ b, wherein Δ DO: for the adjustment amount of dissolved oxygen；ΔNH3: for the changing value of ammonia nitrogen；K, b is constant, value difference
For -1 and 0.5；
The setting value of first ammonia nitrogen in-line meter is set to be constant section, according to the variation of ammonia nitrogens different in the section of setting
Value obtains dissolved oxygen adjustment matrix；When automatic running, automatic, matrix is adjusted according to the dissolved oxygen according to the changing value of ammonia nitrogen
Match and adjust the setting value of the second dissolved oxygen in-line meter.
8. aeration control method according to claim 6 or 7, which is characterized in that the feedforward of the dissolved oxygen of the method with it is anti-
It presents in aeration control, is distributed automatically by the adjustment period of setting according to the changing value of ammonia nitrogen and adjust the second dissolved oxygen in-line meter
Setting value in adjustment period for setting as 0.5h.
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| CN117923681A (en) * | 2024-03-14 | 2024-04-26 | 深圳市水务科技有限公司 | Intelligent algorithm cooperated dissolved oxygen and ammonia nitrogen feedback control accurate aeration system and method |
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