Carbon source Intelligent adding system for powered
Technical field
The utility model belongs to sewage-treatment plant and its application, particularly relate to a kind of carbon source Intelligent adding system for powered and its
Application in sewage disposal.
Background technology
Anti-nitration reaction is the important link being removed to nitrogen in biological treatment process, in Sewage Biological Treatment denitrogenation,
Organic nitrogen by ammonification is transformed into ammonia nitrogen, and ammonia nitrogen generates nitrate nitrogen and nitrite nitrogen in the case where nitrifier acts on, this two kinds
Nitrogen is under the action of denitrifying bacterium, using organic matter as electron acceptor in anaerobic environment, eventually becomes nitrogen and is discharged into air.
By taking methanol as an example, reaction equation is as follows:
Currently, to ensure being normally carried out for anti-nitration reaction, meet increasingly strict effluent index requirement, most of sewage
Denitrification effect improves by the way of adding carbon source in treatment plant, and the mode that carbon source adds is usually that artificial theoretical calculation is permanent
Amount adds.However since sewage plant amount of inlet water and variation water quality are larger, can neither be grown according to microorganism when constant adds
Actual demand adds carbon source, and detection device is mostly in the rear end in denitrification pond so that data feedback lags, and causes carbon source super
Amount adds, and such one is to cause medicament waste, increases operating cost, on the other hand excessively adding carbon source again makes water outlet COD
There are risk of exceeding criterion, needs to consume it by aerobic reaction, increase the aeration energy consumption of system.Therefore, pass through data
Optimization carbon source dosage is analyzed and accurately controlled, improves the efficiency of dosing system, realizes automatically controlling pair for carbon source dosing system
The operation of sewage disposal stably reaching standard cost-effective is of great significance.
Detection of the existing carbon source dosing system Main Basiss to the single index such as nitrate, dissolved oxygen, dynamic control external carbon
The dosage in source, and while adding added with constant or it is disposable largely add as dosing method, constant adds that cause cannot
The accurate carbon source of actual needs progress grown according to microorganism in water body adds control, keeps reaction insufficient, and the reaction time is long,
And easily occur adding excess.
The patent document that applicant retrieves includes:
Application No. is disclose a kind of carbon source in 201410514016.4 patent application to add Feedforward-feedback control device
And control method, only nitrate nitrogen is leaned on to calculate carbon source, does not consider the influence that the other factors such as nitrite nitrogen consume carbon source, can cause
Carbon source dosage is insufficient or calculates the big problem of error;Application No. is disclose one kind in 200710063592.1 patent application
Multi-section water-inlet A/O biological denitrificaions dissolved oxygen and carbon source dosing control device and method, application No. is the special of 200610200357.X
A kind of anoxia/aerobic biological denitrification process running optimizatin control system and its On-Line Control Method are disclosed in profit application, it is above-mentioned
The major technique solution of document is to determine carbon source according to one or two of ORP, pH, DO index, can not from ORP, pH,
DO and carbon source, which add, establishes functional relation, can not accurate calculation carbon source add.Main problem existing for above patent document is control
Parameter processed is single.
Application No. is a kind of denitrification bio-filter technique carbon source throwing is disclosed in the patent application of 201110161740.X
Add optimal control apparatus and method, the accounting that carbon source adds is carried out using the formula:Carbon source dosage=2.86 ([NO3-N]in-
[NO3--N]out)+1.71([NO2-N]in-[NO2-N]out)+[DO]in.Although the defect of the prior art is to introduce DO values,
But coefficient is theoretical value before nitrate nitrogen, nitrite nitrogen and DO values in its formula, does not consider that on-site actual situations miss its consumption
Difference.The dosage does not consider contribution numerical value of the sewage itself COD to carbon source simultaneously, causes result error larger.
Application No. is being disclosed in 200810116032.2 patent application, a kind of denitrogenation sequence intermittent activated sludge is anti-
Carbon source addition method is answered, is " carbon source being added in anaerobic stages, with oxidation-reduction potential and/or pH value parameter in order to control ";" to containing
When nitrogen waste water starts anaerobism, addition carbon source to oxidation-reduction potential or pH value is begun to decline "." according to unitary variant ORP numerical value and
Or whether pH value begins to decline to add the foundation of carbon source, addition carbon source is to add pump with pulsed carbon source to carry out pulsed throwing
Add, add mechanically added on a small quantity with the pump dosing method progress of constant list every time, continued while adding with ORP and/or
The unit interval changing value of pH value is basis for estimation, until suitable additional carbon ensures complete denitrification." the prior art deposits
Main problem be the denitrification for being adapted only to close water body, and, arteries and veins not applicable for the water factory of most of continuum micromeehanics water outlet
Punching, which adds, to be only suitable for adding on a small quantity, is not easy to meet when the water of processing is larger.
Utility model content
The purpose of this utility model is to provide a kind of carbon source Intelligent adding system for powered, by water inlet for denitrification pond,
The real-time detection of multiple data in water outlet and denitrification pond adds total amount to carbon source according to real-time detector data and is adjusted in real time
Whole, control device adds total amount according to the carbon source adjusted in real time, the pump tubing length being connect with carbon source storage tank by Frequency Converter Control
It realizes and carbon source segmentation is accurately added.
The overall technology of the utility model is conceived:
Carbon source Intelligent adding system for powered, including control device, denitrification pond, carbon source throwing device, water inlet pipe and outlet pipe point
Connection not corresponding with the input terminal in denitrification pond and output end, carbon source throwing device is under control of the control means to denitrification pond
Add carbon source;The signal acquisition terminal of first nitrite nitrogen monitor, flow monitoring instrument and the first nitrate nitrogen monitor is set to water inlet
In pipeline, the signal acquisition terminal of the second nitrite nitrogen monitor, the second nitrate nitrogen monitor and COD monitors is set to outlet pipeline
It is interior, the reversed nitrification tank of signal acquisition terminal of ORP on-line computing models, the first nitrite nitrogen monitor, flow monitoring instrument, the first nitre state
Nitrogen monitor, the second nitrite nitrogen monitor, the second nitrate nitrogen monitor, the signal of COD monitors and ORP on-line computing models are defeated
Go out to terminate the signal input of control device, carbon source throwing device includes carbon source storage tank and coupled and by corresponding frequency converter control
The pump tubing length of speed governing processed, pump tubing length share three road output ends, and first via output end taps into water lines, the second road output end
The stage casing of reversed nitrification tank, the back segment of the reversed nitrification tank of third road output end.
Applicant is it should be noted that because of nitrite nitrogen monitor, nitrate nitrogen monitor, flow monitoring instrument, COD monitorings
Instrument, ORP on-line computing models, frequency converter are existing mature technology and have corresponding commercial product, and applicant is at this to its structure
And detailed operation principle repeats no more.
The particular technique design of the utility model also has:
It is initial dense due to different with nitrite nitrogen (predominantly nitrate) concentration along nitrate nitrogen is flowed in denitrification pond body
Degree is higher, thus front end carbon source adds ratio height, and end nitrate nitrogen and nitrite nitrogen concentration are relatively low, add a small amount of carbon source and carry out
Fine tuning meets nitrate nitrogen and nitrite nitrogen concentration changing rule in pond body, while segmentation adds caused by avoiding single-point input
Carbon source inhomogeneities is more abundant to utilization of carbon source.Therefore the first via in pump tubing length adds the carbon source amount to water inlet pipe
It is larger;Denitrification pond stage casing need to add more accurately carbon source, and the second road dosage in pump tubing length takes second place;Denitrification pond back segment
What mainly progress carbon source added accurately controls, so the third road dosage in pump tubing length is less, it is real by adding on a small quantity
When the method that monitors, improve the accuracy added.
It is according to the variation of denitrification pond internal carbon source concentration and the growth demand of microorganism, preferred technical solution, the
At the 1/3-1/2 of the two reversed nitrification tanks of road output end.
Further, at the 3/5-4/5 of the reversed nitrification tank of third road output end.
Application of the carbon source Intelligent adding system for powered in sewage disposal is to acquire the water inlet in denitrification pond by control device, go out
Include the real time data of nitrate nitrogen, nitrite nitrogen, flow, COD, ORP in water and denitrification pond, passes through real-time detector data meter
Calculate and adjustment carbon source add total amount, the carbon source according to adjustment add the pumping installations that overall control is connect with carbon source storage tank realize to
The carbon source segmentation of denitrification pond accurately adds.
Application of the carbon source Intelligent adding system for powered in sewage disposal, includes the following steps:
A, carbon source adds the calculating of total amount
To the data analysis of water factory and when needing to add carbon source, starts carbon source dosing system, supervised by the first nitrite nitrogen
Survey instrument, flow monitoring instrument, the first nitrate nitrogen monitor, the second nitrite nitrogen monitor, the second nitrate nitrogen monitor, COD monitorings
Instrument and ORP on-line computing models detect corresponding data, and control device calculates carbon source by following formula according to detection data and adds always
Amount:
Carbon source adds total amount (kg/h)=(nitrate nitrogen coefficient × ([NO3- N] out-1.5)+nitrite nitrogen coefficient ×
[NO2-- N] out) the ÷ carbon sources COD equivalents × Q × k
Wherein:
[NO3--N]out:Effluent nitrate-nitrogen value, the real-time nitrate nitrogen numerical value that the second nitrate nitrogen monitor is read, unit mg/
L;
[NO2--N]out:Water outlet nitrite nitrogen value, the real-time nitrite nitrogen numerical value that the second nitrite nitrogen monitor is read,
Unit mg/L;
Q:Flow of inlet water (the m in denitrification pond3/d);
k:Units conversion factor, k=1/ (24 × 103);
Nitrate nitrogen coefficient, nitrite nitrogen coefficient and the correspondence for the ORP readings that ORP on-line computing models measure are as follows:
As ORP < -100mv, nitrate nitrogen coefficient is 5, and nitrite nitrogen coefficient is 3;As -100mv≤ORP < -50mv,
Nitrate nitrogen coefficient is 4, and nitrite nitrogen coefficient is 2.5;As -50mv≤ORP < 0mv, nitrate nitrogen coefficient is 3, nitrite nitrogen system
Number is 2;As ORP >=0mv, nitrate nitrogen coefficient is 2, and nitrite nitrogen coefficient is 1.5;
B, realize that the segmentation of carbon source adds according to the dosage for appraising and deciding carbon source in real time
Control device is according to the first nitrite nitrogen monitor, flow monitoring instrument, the first nitrate nitrogen monitor, the second nitrous state
The corresponding data that nitrogen monitor, the second nitrate nitrogen monitor, COD monitors and ORP on-line computing models are detected and exported in real time, knot
The corresponding nitrate nitrogen coefficient of ORP detection datas and nitrite nitrogen coefficient are closed, by control device to the real-time adjustment of carbon source dosage;Control
The first via of the feed flow for the pump tubing length that device processed is connected through Frequency Converter Control with carbon source storage tank, pump tubing length adds carbon source
To inlet pipeline, the second tunnel adds carbon source to the stage casing in denitrification pond, and the surplus in carbon source total amount is pumped up the third road of pipeline
It adds to the back segment in denitrification pond;Wherein the first via add carbon source amount be T1, carbon source total amount × 55%≤T1 < carbon sources total amount ×
65%, it is T2, carbon source total amount × 25%≤T2 < carbon source total amount × 35% that the second tunnel, which adds carbon source amount,;
C, stop carbon source adding
When nitrate nitrogen+nitrite nitrogen≤setting value, control device is interrupted by frequency converter stops pump tubing length to carbon source
Conveying is completed carbon source segmentation and is accurately added.Setting value can be with sets itself according to the different requirements of effluent quality.
Real time calibration is carried out for ease of adding total amount for carbon source, to ensure to be segmented the accuracy added, while considering work
The feasibility that relevant device and technology are realized in industry, preferred technical solution is the frequency detected in real time in the step B
It is primary for every 1-5 minutes detection.
Applicant it should be noted that:
Term " first ", " second ", " first via ", " the second tunnel ", " third road " are only in the description of the present invention,
The utility model is described for the ease of simplicity and clarity, rather than indicates or implies its importance, therefore should not be understood as to this reality
With novel limitation.
Formula in the utility model derives from the industry《Biological denitrification process and dynamics》2-33 formula, due to
Difference is larger sometimes with actual conditions for coefficient value during the theoretical value that 2-33 formula calculate calculates, according to the practice of applicant, and
It summarizes and obtains after the influence factor added to carbon source in view of oxidation-reduction potential (ORP).
Technological progress acquired by the utility model is:
1, the existing product of existing maturation can be used in each detecting instrument in the utility model, control device, frequency converter,
Its overall construction design is reasonable, convenient for existing denitrification pond installation and it is easy to maintain.Simultaneously technique realization is added for carbon source
Provide effective equipment guarantee.
2, the utility model includes not only nitrite nitrogen, nitrate nitrogen, flow, COD, ORP etc., Er Qietong in data acquisition
Experimental summary is crossed, specifies the correspondence between nitrite nitrogen coefficient, nitrate nitrogen coefficient and ORP, is the standard of carbon source dosage
It really calculates and lays a good foundation.
3, can add carbon source by total amount and carry out real-time adjustment, anti-for the data acquired in real time according to each detecting instrument
The accuracy that carbon source adds total amount dynamic adjustment has been effectively ensured during should carrying out.
4, according to microorganism in denitrification pond for the different demands of carbon source, reasonable definition carbon source adds region and adds
Amount, be easy to ensure reaction be normally carried out and meet microorganism actual needs under the premise of, it is easy to accomplish carbon source adds accurate
Control.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model.
1, the first nitrite nitrogen monitor;2, flow monitoring instrument;3, the first nitrate nitrogen monitor;4, the second nitrite nitrogen is supervised
Survey instrument;5, the second nitrate nitrogen monitor;6, COD monitors;7, ORP on-line computing models;8, control device;9, carbon source storage tank;10、
Denitrification pond.
Dotted arrow indicates that detection or control signal trend, solid arrow indicate water or carbon source trend in Fig. 1.
Specific implementation mode
The utility model is described further with reference to embodiments, but should not be construed as the limit to the utility model
Fixed, the scope of protection of the utility model is subject to the content of claim record, any equivalent skill made according to specification
Art means are replaced, all without departing from the scope of protection of the utility model.
Overall structure in the present embodiment is as shown in Figure 1, including control device 8, denitrification pond 10, carbon source throwing device,
Water inlet pipe with outlet pipe is corresponding with the input terminal in denitrification pond 10 and output end respectively is connected to, carbon source throwing device is in control device
Control under to denitrification pond 10 add carbon source;First nitrite nitrogen monitor 1, flow monitoring instrument 2 and the monitoring of the first nitrate nitrogen
The signal acquisition terminal of instrument 3 is set in inlet pipeline, the second nitrite nitrogen monitor 4, the second nitrate nitrogen monitor 5 and COD monitorings
The signal acquisition terminal of instrument 6 is set in outlet pipeline, the reversed nitrification tank 10 of signal acquisition terminal of ORP on-line computing models 7, the first nitrous
State nitrogen monitor 1, flow monitoring instrument 2, the first nitrate nitrogen monitor 3, the second nitrite nitrogen monitor 4, the monitoring of the second nitrate nitrogen
The signal output end of instrument 5, COD monitors 6 and ORP on-line computing models 7 connects the signal input of control device 8, carbon source throwing device
Including carbon source storage tank 9 and coupled and by the pump tubing length of corresponding Frequency Converter Control speed governing, it is defeated that pump tubing length shares three roads
Outlet, first via output end tap into water lines, the stage casing of the reversed nitrification tank of the second road output end 10, and third road output end is reversed
The back segment of nitrification tank 10.
At the 1/3-1/2 of the reversed nitrification tank of second road output end 10.
At the 3/5-4/5 of the reversed nitrification tank of third road output end 10.
Application of the carbon source Intelligent adding system for powered in sewage disposal is to acquire the water inlet in denitrification pond by control device, go out
Include the real time data of nitrate nitrogen, nitrite nitrogen, flow, COD, ORP in water and denitrification pond, passes through real-time detector data meter
It calculates and adjustment carbon source adds total amount, adding the pumping installations that overall control is connect with carbon source storage tank according to the carbon source after adjustment realizes
It accurately adds, specifically comprises the following steps to the segmentation of denitrification pond internal carbon source:
A, carbon source adds the calculating of total amount
To the data analysis of water factory and when needing to add carbon source, starts carbon source dosing system, supervised by the first nitrite nitrogen
Survey instrument 1, flow monitoring instrument 2, the first nitrate nitrogen monitor 3, the second nitrite nitrogen monitor 4, the second nitrate nitrogen monitor 5, COD
Monitor 6 and ORP on-line computing models 7 detect corresponding data, and control device 8 calculates carbon source according to detection data by following formula
Add total amount:
Carbon source adds total amount (kg/h)=(nitrate nitrogen coefficient × ([NO3- N] out-1.5)+nitrite nitrogen coefficient ×
[NO2-- N] out) the ÷ carbon sources COD equivalents × Q × k
Wherein:
[NO3--N]out:Effluent nitrate-nitrogen value, the real-time nitrate nitrogen numerical value that the second nitrate nitrogen monitor 5 is read, unit
mg/L;
[NO2--N]out:Water outlet nitrite nitrogen value, the real-time nitrite nitrogen numerical value that the second nitrite nitrogen monitor 4 is read,
Unit mg/L;
Q:Flow of inlet water (the m in denitrification pond3/d);
k:Units conversion factor, k=1/ (24 × 103);
Nitrate nitrogen coefficient, nitrite nitrogen coefficient and the correspondence for the ORP readings that ORP on-line computing models measure are as follows:
As ORP < -100mv, nitrate nitrogen coefficient is 5, and nitrite nitrogen coefficient is 3;As -100mv≤ORP < -50mv,
Nitrate nitrogen coefficient is 4, and nitrite nitrogen coefficient is 2.5;As -50mv≤ORP < 0mv, nitrate nitrogen coefficient is 3, nitrite nitrogen system
Number is 2;As ORP >=0mv, nitrate nitrogen coefficient is 2, and nitrite nitrogen coefficient is 1.5;
B, realize that the segmentation of carbon source adds according to the dosage for appraising and deciding carbon source in real time
Control device is sub- according to the first nitrite nitrogen monitor 1, flow monitoring instrument 2, the first nitrate nitrogen monitor 3, second
The phase that nitrate nitrogen monitor 4, the second nitrate nitrogen monitor 5, COD monitors 6 and ORP on-line computing models 7 are detected and exported in real time
Data are answered, the real-time adjustment of total amount is added to carbon source in conjunction with the corresponding nitrate nitrogen coefficient of ORP detection datas and nitrite nitrogen coefficient;Control
The feed flow for the pump tubing length that device 8 processed is connected through Frequency Converter Control with carbon source storage tank, the first via of pump tubing length add carbon
Source is to inlet pipeline, and the second tunnel adds carbon source to the stage casing in denitrification pond, and the surplus in carbon source total amount is pumped up the third of pipeline
Road is added to the back segment in denitrification pond;It is T1, carbon source total amount × 55%≤T1 < carbon source total amounts that wherein the first via, which adds carbon source amount,
× 65%, it is T2, carbon source total amount × 25%≤T2 < carbon source total amount × 35% that the second tunnel, which adds carbon source amount,;
C, stop carbon source adding
When nitrate nitrogen+nitrite nitrogen≤setting value, control device 8 interrupts pump tubing length to the defeated of carbon source by frequency converter
It send, completes carbon source segmentation and accurately add.
Setting value in the present embodiment selects 10mg/L.
The frequency detected in real time in the step B is that detection was primary per 1-5 minutes.
To verify the effect of the utility model embodiment, applicant carried out following experiments:
Using the practical secondary treatment yielding water that certain municipal sewage plant is discharged as objective for implementation, selected denitrification pond
Treatment scale 3.5m3/ d, additional carbon select sodium acetate, water outlet nitrate nitrogen to require to be less than 10mg/L.
By control device 8 by the first nitrite nitrogen monitor 1, flow monitoring instrument 2, the first nitrate nitrogen monitor 3, second
The detection data that nitrite nitrogen monitor 4, the second nitrate nitrogen monitor 5, COD monitors 6 and ORP on-line computing models 7 transmit into
Row the Fitting Calculation is first judged whether (effluent nitrate-nitrogen+water outlet nitrite nitrogen) is greater than the set value that (the present embodiment is set as
10mg/L), if effluent nitrate-nitrogen+water outlet nitrite nitrogen≤10mg/L, stops the carbon source and add intelligent optimization system;If water outlet
Nitrate nitrogen+water outlet nitrite nitrogen > 10mg/L, then control device accounting carbon source dosage, executes formula procedure, respectively according to pump
The first via of pipeline is sent to add the 60% of carbon source total amount to inlet pipeline, the second tunnel adds the 30% of carbon source total amount to denitrification pond
Stage casing, 10% in carbon source total amount adds through third road and realizes that the segmentation of carbon source is accurately added to the back segment in denitrification pond.
According to the data (10mg/L) of the second nitrate nitrogen monitor 5 detection, the data of the second nitrite nitrogen monitor detection
Data (- 60mv) data of (3mg/L), ORP on-line computing models detection, determine that modifying factor takes nitre state in carbon source dosage formula
Nitrogen coefficient is 4, and nitrite nitrogen coefficient is 2.5;
Carbon source adds total amount (kg/h)=(nitrate nitrogen coefficient × ([NO3- N] out-1.5)+nitrite nitrogen coefficient ×
[NO2-- N] out) the ÷ carbon sources COD equivalents × Q × k
=(4 × (10-1.5)+2.5 × 3) ÷ 0.78 × 3.5 × 103×1/(24×103)
=7.76kg/h
Amount=7.76/0.25=31.04 (kg/h) of 25% sodium acetate
According to the leading portion (first via in pump tubing length) in denitrification pond, stage casing (the second tunnel in pump tubing length), back segment
(the third road in pump tubing length) adds carbon source and accounts for add total amount 60%, 30%, 10% respectively, and 25% acetic acid added
Sodium is calculated, and respectively leading portion is 18.624kg/h, and stage casing is 9.312kg/h, and back segment is 3.104kg/h.It supervises in real time in the process
Nitrate nitrogen, nitrite nitrogen effluent index are surveyed, when the sum of nitrate nitrogen, nitrite nitrogen are less than 10mg/L, stopping adds carbon source.
By 48 hours trial operations, the operation in the denitrification pond of the present embodiment was normal, was thrown by automatically controlling carbon source
Dosage ensures that denitrification pond is discharged nitrate stably reaching standard.
The effluent quality in the present embodiment operational process remains after testing:
COD is less than 30mg/L, and NO3--N is less than 10mg/L, and TN is less than 15mg/L, and TP is less than 0.2mg/L, and SS is less than 5mg/
L, water quality reach IV class water standard of earth's surface.
25% one day dosage=31.04 of sodium acetate × 24=744.96 (kg/d)
One different carbon source of table through this embodiment in system add carbon source Contrast on effect result
Two the utility model embodiment of table adds the comparing result of carbon source with existing measurement
Conclusion, from table one and table two as can be seen that the utility model adds carbon source can save the carbon source of 3%-10% and add,
And ensure that being discharged total nitrogen index reaches IV class water standard of earth's surface (Beijing DB11/890-2012B standards);It is (single with routine techniques
Factor, constant add) compare, there is saving carbon source to add, the good advantage of effluent index.