CN106843298A - A kind of control device and method of step feed technology - Google Patents
A kind of control device and method of step feed technology Download PDFInfo
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- CN106843298A CN106843298A CN201710093803.XA CN201710093803A CN106843298A CN 106843298 A CN106843298 A CN 106843298A CN 201710093803 A CN201710093803 A CN 201710093803A CN 106843298 A CN106843298 A CN 106843298A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/139—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring a value related to the quantity of the individual components and sensing at least one property of the mixture
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/001—Upstream control, i.e. monitoring for predictive control
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/15—N03-N
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/38—Gas flow rate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
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- Environmental & Geological Engineering (AREA)
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Abstract
A kind of control device and method of step feed technology, belongs to technical field of biological sewage treatment.Intake pump is connected with water tank inlet, the outlet conduit of intake pump is connected by water quantity controller with the flowmeter and control valve of first reactor anoxic zone, first reactor has agitator in anoxic zone, there is aerator in first aerobic zone, aerator is connected with quantity distribution valve of gas, the other end connecting fan and air flow controller of quantity distribution valve of gas, blower fan is connected with air flow controller, nitrate on-line determination instrument is connected with segmental influent controller, ammonia nitrogen on-line determination instrument is connected with segmental influent controller, nitrate on-line determination instrument is arranged on first reactor anoxic zone, ammonia nitrogen on-line determination instrument is arranged on the first aerobic zone, segmental influent controller is connected with water quantity controller.The present invention realizes the regulation and control that become more meticulous of step feed technology；Suitable for city domestic sewage, industrial wastewater denitrogenation processing.
Description
Technical field
The present invention relates to a kind of control device and method of step feed technology, belong to technical field of biological sewage treatment.
Background technology
Wastewater biological denitrificaion be in the course of reaction that nitrification and denitrification bacterium participates in, ammonia nitrogen is eventually converted into nitrogen and
It is removed from waste water.Mineralized nitrogen is nitrate nitrogen by nitration reaction, and nitrate nitrogen is converted into nitrogen, nitrified by denitrification
Journey needs the aeration aerating, denitrification process to need organic matter as carbon source, and AO techniques are most widely used sewage water denitrification treatment
Technology, and the sewage for water inlet C/N less than 5, traditional A/O techniques can not be made full use of into the carbon source in water as denitrification
Carbon source, causes advanced nitrogen to require supplementation with carbon source, increases additional carbon expense.
Segmental influent Anoxic/Aerobic (A/O) biological denitrification process is that a kind of biological denitrificaion treatment developed in recent years is new
Technology.Compared with traditional A/O techniques, the technological advantage is numerous：
(1) backflow facility in nitrification liquid need not be set, interior backflow energy is saved, operating cost is reduced；
(2) degradable COD carries out denitrification in making full use of raw water, saves additional carbon dosage；
(3) the degradable COD in raw water is removed as denitrifying carbon source, to reduce and remove the part under aerobic condition
The aeration energy consumption of COD.
But the core of step feed technology is the distribution of amount of inlet water, the water operation of current segmental influent is fixation
Ratio water distribution, that is, ratio of intaking disposably determines in debugging, it is impossible to adjust water inlet ratio, shadow in time with the change of influent quality
Ring the stability and effluent quality of step feed technology operation.Therefore, regulation and control implement with notable to step feed technology
Realistic meaning.
The content of the invention
In order to overcome the deficiencies in the prior art, the present invention to provide a kind of control device and method of step feed technology.
A kind of control method of step feed technology, contains following steps；
Using segmental influent device and control system according to ruuning situation modulation process；
Nitrate control according to anoxic pond water outlet is distributed to the water of anoxic pond；
The aeration rate in the ammonia control oxygen pond according to Aerobic Pond；The operating condition of system is set mutually to be fitted with the fluctuation of influent quality
Should.
Also contain following steps；
The rate-determining steps of step 1, anoxic pond；
Start segmental influent controller, set in the controller each anoxic section (A1-An) nitrate upper limit XG and
Lower limit X D, sets comparison interval time T1, sets the amplitude N1 (%) of anoxic water inlet system flow single motion；
Online nitrate nitrogen sensor obtains measured signal, and signal is fed back into segmental influent controller, in controller,
Measured signal and setting value bound (XG XD) are once compared every time T1；
When in T1 time intervals anoxic pond An actual measurement nitrate average value within range of set value, i.e., XD~
Between XG values, then system is continued to run with, and water dispensing apparatus maintain the anoxic pond water distribution constant rate；When actual measurement nitrate is average
When value is less than lower limit X D, then anoxic pond water inlet ratio improves N1%；When it is higher than upper limit XG to survey nitrate, then reduce
Anoxic pond water inlet ratio reduction N1%；
The rate-determining steps of step 2, Aerobic Pond；
Start segmental influent controller, set in the controller each aerobic section (O1-On) ammonia nitrogen concentration upper limit AG and under
Limit AD, sets comparison interval time T2, the amplitude N2 (%) of setting Aerobic Pond air flow control device single tolerance action；
Online ammonia nitrogen sensor obtains measured signal, and signal is fed back into segmental influent controller, real in controller
Signal and setting value bound (AG AD) is surveyed once to be compared every time T2；
When the average value of Aerobic Pond On actual measurements ammonia nitrogen concentration in T2 time intervals is within range of set value, i.e., in AD~AG
Between value, then system is continued to run with, and air flow control device maintains the Aerobic Pond aeration rate constant；When actual measurement ammonia nitrogen concentration average value
During less than lower limit AD, then the Aerobic Pond aeration rate reduces N2%；When it is higher than upper limit AG to survey ammonia nitrogen concentration, then this is improved aerobic
Pond aeration rate N2%；
Nitrate nitrogen and ammonia nitrogen higher limit can be according to this kind of discharge standard values of waste water, and lower limit is between 0~higher limit
Value.
The span for comparing time interval T1/T2 is 1~60 minute.
A kind of control device of step feed technology, intake pump is connected with water tank inlet, and the outlet conduit of intake pump passes through
Water quantity controller is connected with the flowmeter and control valve of first reactor anoxic zone, and first reactor has agitator in anoxic zone,
There is aerator in first aerobic zone, aerator is connected with quantity distribution valve of gas, the other end connecting fan and tolerance of quantity distribution valve of gas
Controller, blower fan is connected with air flow controller, and nitrate on-line determination instrument is connected with segmental influent controller, ammonia nitrogen on-line determination
Instrument is connected with segmental influent controller, and nitrate on-line determination instrument is arranged on first reactor anoxic zone, ammonia nitrogen on-line determination instrument
Installed in the first aerobic zone, segmental influent controller is connected with water quantity controller.
Second reactor anoxic zone, the 3rd reactor anoxic zone, the 4th reactor anoxic zone and first reactor anoxic zone
Structure it is identical.
The structure of the second aerobic zone, the 3rd aerobic zone and the 4th aerobic zone is identical with the first aerobic zone.
Nitrate on-line determination instrument is separately mounted to second reactor anoxic zone, the 3rd reactor anoxic zone and the 4th reaction
Device anoxic zone.
Ammonia nitrogen on-line determination instrument is separately mounted to the second aerobic zone, the 3rd aerobic zone and the 4th aerobic zone.
4th aerobic zone is connected with sedimentation basin, and sedimentation basin bottom is connected with sludge reflux pump inlet, sludge reflux pump discharge
It is connected with first reactor anoxic zone.
It is an advantage of the invention that：
The segmental influent device and control system of present invention exploitation can be according to each anoxic ponds of segmental influent reactor and good
To the removal situation of pollutant, the aeration rate of the water distribution ratio of adjustment anoxic pond and Aerobic Pond, solves and fixes in time in oxygen pond
Water ratio and the problem that causes, optimize the operating condition of each unit, improve system treatment effect, and system realizes automation control
System, improves control accuracy, reduces amount of operation labor.
Realize the regulation and control that become more meticulous of step feed technology；Suitable for city domestic sewage, industrial wastewater denitrogenation processing.
Brief description of the drawings
When considered in conjunction with the accompanying drawings, by referring to following detailed description, can more completely more fully understand the present invention with
And the adjoint advantage of many of which is easily learnt, but accompanying drawing described herein is used for providing a further understanding of the present invention,
A part of the invention is constituted, schematic description and description of the invention is used to explain the present invention, does not constitute to this hair
Bright improper restriction, such as figure are wherein：
Fig. 1 is structural representation of the invention.
The present invention is further described with reference to the accompanying drawings and examples.
Specific embodiment
Obviously, those skilled in the art belong to guarantor of the invention based on many modifications and variations that spirit of the invention is done
Shield scope.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " " used herein, " one
It is individual ", " described " and " being somebody's turn to do " may also comprise plural form.It is to be further understood that wording " the bag used in this specification
Include " refer to the presence of the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition one or
Multiple other features, integer, step, operation, element, component and/or their group.It should be understood that when title element, component quilt
When ' attach ' to another element, component, it can be directly connected to other elements or component, or can also there is cental element
Part or component.Wording "and/or" used herein is including one or more associated any cells for listing item and entirely
Combine in portion.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific terminology) have with art of the present invention in those of ordinary skill general understanding identical meaning.
Embodiment 1：As shown in figure 1, a kind of control device of step feed technology, intake pump 11 is connected with water tank inlet 1,
The outlet conduit of intake pump 11 is connected by water quantity controller 16 with the flowmeter and control valve 21 of first reactor anoxic zone 2,
There is agitator 14 in first reactor anoxic zone 2,
Second reactor anoxic zone 4, the 3rd reactor anoxic zone 6, the 4th reactor anoxic zone 8 and first reactor anoxic
The structure in area 2 is identical,
Have aerator 15 in first aerobic zone 3, aerator 15 is connected with quantity distribution valve of gas 18, quantity distribution valve of gas 18 it is another
End connecting fan 12 and air flow controller 17, blower fan 12 are connected with air flow controller 17,
The structure of the second aerobic zone 5, the 3rd aerobic zone 7 and the 4th aerobic zone 9 is identical with the first aerobic zone 3,
Nitrate on-line determination instrument 20 is connected with segmental influent controller 22, ammonia nitrogen on-line determination instrument 19 and segmental influent control
Device processed 22 is connected,
Nitrate on-line determination instrument 20 is separately mounted to first reactor anoxic zone 2, second reactor anoxic zone the 4, the 3rd
The reactor anoxic zone 8 of reactor anoxic zone 6 and the 4th,
It is good that ammonia nitrogen on-line determination instrument 19 is separately mounted to the first aerobic zone 3, the second aerobic zone 5, the 3rd aerobic zone 7 and the 4th
Oxygen area 9,
Segmental influent controller 22 is connected with water quantity controller 16,
4th aerobic zone 9 is connected with sedimentation basin 10, and the bottom of sedimentation basin 10 is connected with the import of sludge reflux pump 13, sludge reflux
The outlet of pump 13 is connected with first reactor anoxic zone 2.
Embodiment 2：As shown in figure 1, a kind of control device of step feed technology, sedimentation basin and last aerobic section company
Connect, sedimentation basin bottom sets sludge reflux pump, by sludge reflux to first anoxic pond.
Nitrate on-line determination instrument is set in hypoxia response pond end, ammonia nitrogen on-line determination is set in aerobic reaction tank end
Instrument, is provided with air flow control device on the aerating pipelines of aerobic reaction tank, air flow control device include blower fan, air flow controller,
Quantity distribution valve of gas door, aerator, each aerobic reactor aeration rate can independent control.
Aerobic reaction tank end aerator quantity is gradually reduced.
Aerobic reaction tank end can be set aerobic area, and aerobic area can realize aeration and agitating function.Set in hypoxia response pond
Put agitator.
Water inlet is distributed to hypoxia response pond by water dispensing apparatus, and the water inlet pipe of each anoxic pond sets flowmeter, water distribution dress
Configuration variable frequency pump and frequency converter are put, water is can adjust.
Air flow control device, water dispensing apparatus, on-line sensor are connected with segmental influent controller.
Embodiment 3：As shown in figure 1, a kind of control method of step feed technology, contains following steps；
Using segmental influent device and control system according to ruuning situation modulation process；
Nitrate control according to anoxic pond water outlet is distributed to the water of anoxic pond；
The aeration rate in the ammonia control oxygen pond according to Aerobic Pond；The operating condition of system is set mutually to be fitted with the fluctuation of influent quality
Should.
Also contain following steps；
The rate-determining steps of step 1, anoxic pond；
Start segmental influent controller, each anoxic section is set in the controller, and (A1-An or the first anoxic section to n-th lack
Oxygen section, n sets comparison interval time T1 more than the upper limit XG and lower limit X D of 1) nitrate, sets anoxic water inlet system stream
Measure the amplitude N1 (%) of single motion；
Online nitrate nitrogen sensor obtains measured signal, and signal is fed back into segmental influent controller, in controller,
Measured signal and setting value bound (XG XD) are once compared every time T1；
When in T1 time intervals anoxic pond An actual measurement nitrate average value within range of set value, i.e., XD~
Between XG values (XD can set according to discharge standard, the general XD+2~XD+8 of XG setting ranges), then system is continued to run with, water distribution dress
Put and maintain the anoxic pond water distribution constant rate；When nitrate average value is surveyed less than lower limit X D, then anoxic pond water inlet
Ratio improves N1%；When it is higher than upper limit XG to survey nitrate, then anoxic pond water inlet ratio reduction N1% is reduced；
The rate-determining steps of step 2, Aerobic Pond；
Start segmental influent controller, each aerobic section is set in the controller, and (O1-On or the first aerobic section are to n-th good
Oxygen section, n sets comparison interval time T2, setting Aerobic Pond tolerance control dress more than the upper limit AG and lower limit AD of 1) ammonia nitrogen concentration
Put the amplitude N2 (%) of single tolerance action；
Online ammonia nitrogen sensor obtains measured signal, and signal is fed back into segmental influent controller, real in controller
Survey signal and setting value bound (AG AD) (AD can set according to discharge standard requirement, and AG be generally higher than AD+2~AD+8) every
Once compared every time T2；
When the average value of Aerobic Pond On actual measurements ammonia nitrogen concentration in T2 time intervals is within range of set value, i.e., in AD~AG
Between value, then system is continued to run with, and air flow control device maintains the Aerobic Pond aeration rate constant；When actual measurement ammonia nitrogen concentration average value
During less than lower limit AD, then the Aerobic Pond aeration rate reduces N2%；When it is higher than upper limit AG to survey ammonia nitrogen concentration, then this is improved aerobic
Pond aeration rate N2%；
Nitrate nitrogen and ammonia nitrogen higher limit can be according to this kind of discharge standard values of waste water, and lower limit is between 0~higher limit
Value.
The span for comparing time interval T1/T2 is 1~60 minute.
Embodiment 2：As shown in figure 1,
Certain municipal sewage plant is provided with A0 sections/A1O1 sections/A2O2 sections/A3O3 sections, water inlet distribution using segmented system
To anoxic pond A1/ anoxic pond A2/ anoxic pond A3, the online nitrate nitrogen analyzer of configuration in anoxic pond, Aerobic Pond configures online ammonia nitrogen
Analyzer.Aerobic Pond O1/ Aerobic Pond O2/ Aerobic Pond O3 systems aeration can independent control, and the regulation of aeration rate can be realized.
Start segmental influent controller.It is dense that each anoxic section (anoxic section A1- anoxic sections A3) nitrate nitrogen is set in the controller
The upper limit 7mg/L and lower limit 3mg/L of degree, set the comparison interval time 10, set the width of anoxic water inlet system flow single motion
Degree 2%；
The upper limit 5mg/L and lower limit of each aerobic section (aerobic section O1- aerobic section On) ammonia nitrogen concentration are set in the controller
2mg/L, sets comparison interval time 10, the amplitude 2% of setting Aerobic Pond air flow control device single tolerance action；
The influent ammonia nitrogen of system fluctuates between 40~60mg/L, and the ammonia nitrogen value of water outlet maintains 5mg/L, TN to be maintained at all the time
10mg/L。
As described above, embodiments of the invention are explained, but as long as essentially without this hair of disengaging
Bright inventive point and effect can have many deformations, and this will be readily apparent to persons skilled in the art.Therefore, this
The variation of sample is also integrally incorporated within protection scope of the present invention.
Claims (9)
1. a kind of control device of step feed technology, it is characterised in that intake pump is connected with water tank inlet, the outlet of intake pump
Pipeline is connected by water quantity controller with the flowmeter and control valve of first reactor anoxic zone, and first reactor has in anoxic zone
Agitator, there is aerator in the first aerobic zone, aerator is connected with quantity distribution valve of gas, the other end connecting fan of quantity distribution valve of gas
And air flow controller, blower fan is connected with air flow controller, and nitrate on-line determination instrument is connected with segmental influent controller, and ammonia nitrogen exists
Line analyzer is connected with segmental influent controller, and nitrate on-line determination instrument is arranged on first reactor anoxic zone, and ammonia nitrogen is online
Analyzer is arranged on the first aerobic zone, and segmental influent controller is connected with water quantity controller.
2. a kind of control device of step feed technology according to claim 1, it is characterised in that second reactor anoxic
Area, the 3rd reactor anoxic zone, the 4th reactor anoxic zone are identical with the structure of first reactor anoxic zone.
3. the control device of a kind of step feed technology according to claim 1, it is characterised in that the second aerobic zone, the 3rd
The structure of aerobic zone and the 4th aerobic zone is identical with the first aerobic zone.
4. a kind of control device of step feed technology according to claim 2, it is characterised in that nitrate on-line determination
Instrument is separately mounted to second reactor anoxic zone, the 3rd reactor anoxic zone and the 4th reactor anoxic zone.
5. a kind of control device of step feed technology according to claim 3, it is characterised in that ammonia nitrogen on-line determination instrument
It is separately mounted to the second aerobic zone, the 3rd aerobic zone and the 4th aerobic zone.
6. the control device of a kind of step feed technology according to claim 3, it is characterised in that the 4th aerobic zone with it is heavy
Shallow lake pond connects, and sedimentation basin bottom is connected with sludge reflux pump inlet, and sludge reflux pump discharge is connected with first reactor anoxic zone.
7. a kind of control method of step feed technology, it is characterised in that contain following steps；
Using segmental influent device and control system according to ruuning situation modulation process；
Nitrate control according to anoxic pond water outlet is distributed to the water of anoxic pond；
The aeration rate in the ammonia control oxygen pond according to Aerobic Pond；The operating condition of system is set to be adapted with the fluctuation of influent quality.
8. the control method of a kind of step feed technology according to claim 7, it is characterised in that also contain following steps；
The rate-determining steps of step 1, anoxic pond；
Start segmental influent controller, the upper limit XG and lower limit of each anoxic section (A1-An) nitrate are set in the controller
XD, sets comparison interval time T1, sets the amplitude N1 (%) of anoxic water inlet system flow single motion；
Online nitrate nitrogen sensor obtains measured signal, and signal is fed back into segmental influent controller, in controller, actual measurement
Signal and setting value bound (XG XD) are once compared every time T1；
When the average value of anoxic pond An actual measurements nitrate in T1 time intervals is within range of set value, i.e., in XD~XG values
Between, then system is continued to run with, and water dispensing apparatus maintain the anoxic pond water distribution constant rate；When actual measurement nitrate average value is low
When lower limit X D, then anoxic pond water inlet ratio improves N1%；When it is higher than upper limit XG to survey nitrate, then reduces this and lack
Oxygen pond water inlet ratio reduction N1%；
The rate-determining steps of step 2, Aerobic Pond；
Start segmental influent controller, the upper limit AG and lower limit AD of each aerobic section (O1-On) ammonia nitrogen concentration set in the controller,
Setting comparison interval time T2, the amplitude N2 (%) of setting Aerobic Pond air flow control device single tolerance action；
Online ammonia nitrogen sensor obtains measured signal, and signal is fed back into segmental influent controller, in controller, actual measurement letter
Number once compared every time T2 with setting value bound (AG AD)；
When in T2 time intervals Aerobic Pond On actual measurement ammonia nitrogen concentration average value within range of set value, i.e., AD~AG values it
Between, then system is continued to run with, and air flow control device maintains the Aerobic Pond aeration rate constant；When actual measurement ammonia nitrogen concentration average value is less than
During lower limit AD, then the Aerobic Pond aeration rate reduces N2%；When it is higher than upper limit AG to survey ammonia nitrogen concentration, then Aerobic Pond exposure is improved
Tolerance N2%；
Nitrate nitrogen and ammonia nitrogen higher limit can be according to this kind of discharge standard values of waste water, lower limit value between 0~higher limit.
9. the control method of a kind of step feed technology according to claim 8, it is characterised in that compare time interval T1/
The span of T2 is 1~60 minute.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110918272A (en) * | 2019-12-02 | 2020-03-27 | 上海市离心机械研究所有限公司 | Control method for preventing three-phase centrifuge special for oil sludge from being blocked |
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| CN110918272A (en) * | 2019-12-02 | 2020-03-27 | 上海市离心机械研究所有限公司 | Control method for preventing three-phase centrifuge special for oil sludge from being blocked |
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Application publication date: 20170613 |