CN206538258U - A kind of control device of step feed technology - Google Patents
A kind of control device of step feed technology Download PDFInfo
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- CN206538258U CN206538258U CN201720161996.3U CN201720161996U CN206538258U CN 206538258 U CN206538258 U CN 206538258U CN 201720161996 U CN201720161996 U CN 201720161996U CN 206538258 U CN206538258 U CN 206538258U
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Abstract
A kind of control device 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 utility model 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 utility model is related to a kind of control device of step feed technology, belongs 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 aeration aerating, and denitrification process needs organic matter as carbon source, and AO techniques are most widely used sewage water denitrification processing
Technology, and it is less than 5 sewage for water inlet C/N, 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 processing 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, reduce operating cost；
(2) make full use of degradable COD in raw water to carry out denitrification, save additional carbon dosage；
(3) the degradable COD in raw water is removed as denitrifying carbon source, reduces and the part is removed under aerobic condition
COD aeration energy consumption.
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 is determined 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 utility model provides a kind of control device of step feed technology.
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 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.
The utility model has the advantages that：
The segmental influent device and control system of the utility model exploitation can be according to each anoxic ponds of segmental influent reactor
And Aerobic Pond is to the aeration quantity of the removal situation of pollutant, in time the water distribution ratio of adjustment anoxic pond and Aerobic Pond, solve solid
Surely water inlet ratio and the problem of cause, optimize the operating condition of each unit, improve system treatment effect, and system is realized automatically
Change control, improve control accuracy, reduce 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, it can more completely more fully understand that this practicality is new
Type and easily learn the adjoint advantage of many of which, but accompanying drawing described herein be used for providing to it is of the present utility model enter one
Step understands, constitutes a part of the present utility model, and schematic description and description of the present utility model is used to explain this practicality
It is new, do not constitute to improper restriction of the present utility model, such as figure wherein：
Fig. 1 is structural representation of the present utility model.
The utility model is further illustrated with reference to the accompanying drawings and examples.
Embodiment
Obviously, those skilled in the art belong to this practicality based on many modifications and variations that objective of the present utility model is done
New protection domain.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one
It is individual ", " described " and "the" may also comprise plural form.It is to be further understood that wording " the bag used in this specification
Include " refer to there is the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition one or
Other multiple 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, which can be directly connected to other elements, either component or can also have cental element
Part or component.Wording "and/or" used herein includes one or more associated any cells for listing item and complete
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) with the general understanding identical meaning with the those of ordinary skill in the utility model art.
Embodiment 1：As shown in figure 1, a kind of control device of step feed technology, each anoxic zone dischargeable capacity is 20L,
Each aerobic zone dischargeable capacity is 20L, and water tank inlet volume is that 500L intake pumps 11 are connected with water tank inlet 1, intake pump 11
Outlet conduit is connected by water quantity controller 16 with the flowmeter and control valve 21 of first reactor anoxic zone 2, first reactor
There is agitator 14 in 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
Connecting fan 12 and air flow controller 17 are held, blower fan 12 is connected with air flow controller 17,
The structure of 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 22 processed 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 connects with last aerobic section
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
Be provided with air flow control device on instrument, 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 quantity can independent control.
Aerobic reaction tank end aerator quantity is gradually reduced.
Aerobic area can be set in aerobic reaction tank end, 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 running situation modulation process；
Distribution is controlled to the water of anoxic pond according to the nitrate of anoxic pond water outlet；
According to the aeration quantity in the ammonia control oxygen pond of 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 is more than the upper limit XG and lower limit X D of 1) nitrate, sets comparison interval time T1, 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 survey nitrate average value within range of set value, i.e., XD~
Between XG values (XD can be 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 surveying nitrate average value less than lower limit X D, then the anoxic pond is intake
Ratio improves N1%；When surveying nitrate higher than upper limit XG, 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 is more than the upper limit AG and lower limit AD of 1) ammonia nitrogen concentration, sets comparison interval time T2, setting Aerobic Pond tolerance control dress
Put the amplitude N2 (%) of single tolerance action；
Online ammonia nitrogen sensor obtains measured signal, and signal is fed back into segmental influent controller, in controller, real
Survey signal and setting value bound (AG AD) (AD can require to set according to discharge standard, 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 quantity constant；When actual measurement ammonia nitrogen concentration average value
During less than lower limit AD, then the Aerobic Pond aeration quantity reduces N2%；When surveying ammonia nitrogen concentration higher than upper limit AG, then this is improved aerobic
Pond aeration quantity N2%；
Nitrate nitrogen and ammonia nitrogen higher limit can be according to the discharge standard values of this kind 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, online nitrate nitrogen analyzer is configured 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 quantity 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 is fluctuated 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。
Embodiment 3：A kind of control method of step feed technology, contains following steps；
Using segmental influent device and control system according to running situation modulation process；
Distribution is controlled to the water of anoxic pond according to the nitrate of anoxic pond water outlet；
According to the aeration quantity in the ammonia control oxygen pond of 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 survey 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 maintains the anoxic pond water distribution constant rate；When actual measurement nitrate is averaged
When value is less than lower limit X D, then anoxic pond water inlet ratio improves N1%；When surveying nitrate higher than upper limit XG, then reduce
Anoxic pond water inlet ratio reduction N1%；
The rate-determining steps of step 2, Aerobic Pond；
Start segmental influent controller, the upper limit AG of each aerobic section (O1-On) ammonia nitrogen concentration is set in the controller with
AD is limited, comparison interval time T2, the amplitude N2 (%) of setting Aerobic Pond air flow control device single tolerance action is set；
Online ammonia nitrogen sensor obtains measured signal, and signal is fed back into segmental influent controller, in controller, real
Signal and setting value bound (AG AD) is surveyed every time T2 once to be compared；
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 quantity constant；When actual measurement ammonia nitrogen concentration average value
During less than lower limit AD, then the Aerobic Pond aeration quantity reduces N2%；When surveying ammonia nitrogen concentration higher than upper limit AG, then this is improved aerobic
Pond aeration quantity N2%；
Nitrate nitrogen and ammonia nitrogen higher limit can be according to the discharge standard values of this kind of waste water, and lower limit is between 0~higher limit
Value.
The span for comparing time interval T1/T2 is 1~60 minute.
As described above, being explained to embodiment of the present utility model, as long as but essentially without disengaging
Inventive point of the present utility model and effect can have many deformations, and this is apparent to one skilled in the art
's.Therefore, such variation is also integrally incorporated within protection domain of the present utility model.
Claims (6)
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
There is aerator in agitator, 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 is with sinking
Shallow lake pond is connected, and sedimentation basin bottom is connected with sludge reflux pump inlet, and sludge reflux pump discharge is connected with first reactor anoxic zone.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534494A (en) * | 2019-01-17 | 2019-03-29 | 重庆市李家沱排水有限公司 | A kind of the sludge precise monitoring system and its monitoring method of sewage treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534494A (en) * | 2019-01-17 | 2019-03-29 | 重庆市李家沱排水有限公司 | A kind of the sludge precise monitoring system and its monitoring method of sewage treatment |
| CN109534494B (en) * | 2019-01-17 | 2021-06-18 | 重庆市李家沱排水有限公司 | Sewage treatment sludge precise monitoring system and monitoring method thereof |
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