CN202358957U - Automatic control device for sequencing batch processing process in non-DO state - Google Patents
Automatic control device for sequencing batch processing process in non-DO state Download PDFInfo
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- CN202358957U CN202358957U CN2011205192461U CN201120519246U CN202358957U CN 202358957 U CN202358957 U CN 202358957U CN 2011205192461 U CN2011205192461 U CN 2011205192461U CN 201120519246 U CN201120519246 U CN 201120519246U CN 202358957 U CN202358957 U CN 202358957U
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- control device
- automatic control
- aeration
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- 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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Abstract
The utility model discloses an automatic control device for a sequencing batch processing process in a non-DO state. The automatic control device comprises an automatic aeration control device (1), wherein an inlet water quality parameter acquisition device, an inlet water flow meter (2), a frequency conversion control cabinet (4), a blast blower (5) and an outlet water quality monitor (6) are connected to the automatic aeration control device (1); and the frequency conversion control cabinet (4) is connected with the blast blower (5). According to the automatic control device, inlet water quality parameters and water inflow parameters are acquired and are combined with outlet water quality parameters in the last cycle to serve as main processing parameters of the automatic control device, so that ideal working parameters are obtained, and a DO value can be stabilized at a design value; and therefore, requirements on sewage treatment can be met, the operation state of a fan is reasonable, the aim of reducing energy consumption is fulfilled, an automatic control mode is out of the DO state, and problems in the conventional control mode are solved. According to the automatic control device, the energy consumption is reduced remarkably, and the energy consumption is reduced by over 15 to 35 percent compared with the conventional automatic control mode.
Description
Technical field
The utility model relates to a kind of sewage treatment area, the automatic control device of especially a kind of sequence batch (treatment process under non-DO state.
Background technology
At present, in the sequence batch (treatment process, aeration phase is a most important art breading link in the whole sequence batch (treating processes, and the control of aeration air quantity is mainly accomplished by system.The processing target of sequence batch (SBR is oxidation and removal dissolved or small free suspended matter.Oxidizing reaction is to accomplish through the bio-oxidation of mikrobe in SBR, so can mikrobe material be converted into solid and deposition is the key of the normal operation of SBR with hanging effectively.And that oxygen is the microbiological oxidation organism is necessary with the energy that obtains growth; The oxygen quantity not sufficient can make the active reduction of aerobic bacteria; Microbial growth needs a large amount of oxygen in the reaction tank, and the many more microbic activity of food are high more, so the oxygen demand is also big.In addition, the organic stable oxygen that also needs.Thereby the operation that oxygen concn is controlled for whole technology in the reaction tank is very important.Satisfy must the type bacterium activity to reach necessary processing efficient, guarantee minimum oxygen demand.If DO in the reaction tank (dissolved oxygen) is low excessively, thread fungus can breed in a large number and make flocs unit deposition ability reduce; Equally, if DO is too high, flocs unit is difficult to form, and therefore, for guaranteeing the fine effluent quality, must keep suitable DO level, so the running balance of DO is biological treatment process most critical condition.Therefore; In present sequence batch (treatment process; All be to utilize the DO value, make blower fan in reaction tank, send into air at the fixed time, make airborne oxygen in reaction tank, form dissolved oxygen as the automatic most important condition of control; Thereby the DO value in the control reaction tank, and decide the operation conditions of blower fan according to the feedback information of the DO value in the reaction tank.
But; There is following problem in present control method: at first, because present technology has been saved the preposition pond in aerated reaction pond, sewage directly gets in the aerated reaction pond; Therefore the flow of sewage is to change usually; Be not a constant flow, according to the difference of time period, its aeration rate that needs is also inequality.And in the present automatic control mode, flow calculates according to the constant mode, and the start time of blower fan and concluding time all are fixed, therefore in the process that the discharge of sewage changes, just possibly cause the waste or the deficiency of aeration rate; Secondly, there is hysteresis quality in the feedback information of DO value, in the air admission sewage after, need the certain reaction time could form DO, so to decide the running status of blower fan according to the feedback information of DO value be inaccurate.These problems will cause aeration rate control inaccurate, and aeration system maximum link that is energy consumption, its energy consumption is equivalent to 50% of total energy consumption, and therefore, present mode is quite disadvantageous for the saving of energy consumption.
Summary of the invention
The purpose of the utility model is: the automatic control device of a kind of sequence batch (treatment process under non-DO state is provided; It can accurately be controlled aeration rate and keep oxygen level in the aeration tank and be in best scope; Just can make the aeration biochemical reaction effect reach optimum; Under the prerequisite that satisfies the oxygenation requirement, greatly reduce energy consumption, reduced running cost, to overcome the deficiency of prior art.
The utility model is achieved in that the automatic control device of sequence batch (treatment process under non-DO state; Comprise the aeration automatic control device, it is characterized in that: on the aeration automatic control device, be connected with influent quality acquisition parameter collector, flooding velocity meter, VFC cabinet, gas blower and effluent quality monitor; The VFC cabinet is connected with gas blower.
On the aeration automatic control device, be connected with upper control machine.Upper control machine can write down the operating parameter in the aeration automatic control device; As above one-period effluent quality parameter etc.; Can also adjust, revise this parameters of intaking treatment process that the aeration automatic control device is confirmed simultaneously, can be input in the aeration automatic control device going up one-period effluent quality parameter simultaneously.
Influent quality acquisition parameter collector comprises COD detector, BOD detector and ammonia-nitrogen content detector.
The DO value is to weigh an index of water body self-purification ability; Therefore; Present automatic CONTROL PROCESS all can be with the significant parameter of DO value as aeration rate control, and purpose then is in order to obtain ideal DO value, and employing DO value is obviously not energy-conservation as the control process of significant parameter.Because air is after getting into sewage, the efficient and the water level that form DO are related, and this just must consider flooding quantity, carry out aeration if can not form the most effectively at DO in the interval, and the energy of consumption will showed increased.And the DO value only is a presentation in WWT; And essence is influent quality and flooding quantity, and in addition, the choose reasonable of aeration rate also will be considered effluent quality; Effluent quality only need satisfy just up to standard; And it is a lot of need not to be above standard, and could guarantee can not make aeration rate excessive like this, thus the control energy consumption.
PID control or can not be implemented in the process that Sewage Plant amount of inlet water and water quality changes constantly automatically at present through the control method that valve opening is regulated; Keep the aeration tank dissolved oxygen steady concentration, thereby influence the processing efficiency of Sewage Plant, the energy consumption of increase aerating system.Adopt PID (PID) to regulate control; Be that measured value and upper computer dissolved oxygen set(ting)value according to dissolved oxygen in the SBR pond compares; With both deviations through the PID computing after the operating frequency signal of output frequency transformer regulate, thereby the dissolved oxygen content in the control SBR pond; The valve opening adjustment control method is to regulate blower export electrically operated valve aperture through the operations staff artificially according to current running condition and dissolved oxygen prison value of feedback to regulate the dissolved oxygen content of controlling in the SBR pond.More than two kinds of control method lifetime retardances, the aeration energy consumption utilization ratio is low and energy consumption consumes on the valve body, it is low etc. artificially to regulate safety; The maximum characteristics of this system are to have cancelled the employing variable valve to regulate air flow quantity, and variable valve can consume part energy, and long-time running is unfavorable for energy-conservation.
The principle of work of the utility model: in the sequence batch (treatment process; When sewage gets into the aeration tank; According to influent quality bod (biological oxygen demand), cod (COD), ss (suspended substance), pH/t, the water yield and go up each processing parameter that one-period effluent quality situation etc. obtains this water inlet treatment process (the initial water level of aeration, aeration time, aeration stopping water level, aeration rate, Aeration fan running frequency and operation platform number, ST, strain water time, returned sluge/excess sludge discharge time etc.); And in the middle of operation; Blast volume also can correspondingly be adjusted according to the variation of influent quality, the water yield; Can satisfy the needed aeration rate of aeration tank day part biochemical reaction in real time, keep the steady running of technology; Can comparatively accurately simulate the interactive variation relation of each parameter and required aeration rate in the actual aerated reaction.
Control strategy is selected: adopt through online Inlet and outlet water water quality system realization parameter and dynamically control.
Employing possesses such control thought through online Inlet and outlet water water quality system control aeration rate: look the influent concentration situation and confirm aeration time, frequency transformer running frequency parameter manipulated variable; Water inlet COD concentration is higher when big; Take bigger manipulated variable output, to embody correction rapidly; Water inlet COD concentration hour is taked more careful little manipulated variable output and shorter aeration time.Gas blower has been selected the roots blower of flexible, energy-conservation band speed control by frequency variation for use, has the characteristic of permanent torque output, flow and rotating speed relation in direct ratio, shaft power and rotating speed relation also in direct ratio.
The utility model has the following advantages in implementing:
One, professional system is that the sewage biochemical treatment system is special-purpose.
Two, open 1. powerful topological ability is convenient to the reorganization and expansion of aerating system.
2. seamless embedding ability can easily must embed the SCADA system of entire sewage treatment plant.
Three, the interface of the development platform of the 1. full Chinese of friendly, the demonstration of full Chinese, specialized design, hommization.
Four, the intelligent intelligent control that 1. realizes aerating system.Guarantee efficient the processing.Low cost movement.
When 2. equipment broke down, sound, light were reported to the police automatically, made the best acute processing of answering simultaneously;
3. easily and fast check, preserve real time data, alert data, historical data.
Five, 1. sewage treatment capacity raising of energy saving;
2. gas blower current consumption reduces;
3. cost of labor reduces.
Six, security can be provided with multi-stage user cryptoguard, thereby guarantees security of system steady running.
Owing to adopted technique scheme, compared with prior art, the utility model is gathered influent quality parameter and flooding quantity parameter; They are combined to go up the main processing parameter of one-period effluent quality parameter as automatic control device; To obtain the ideal operation parameter, can make the DO value can be stabilized in value, can satisfy the requirement of WWT like this; Can make the running status of blower fan more reasonable again; Play the purpose of energy efficient, make auto-control mode break away from the DO state, avoided the problem that exists in the traditional control method.The utility model energy consumption significantly reduces, and compares with existing automatic control mode, saves energy consumption more than 15%～35%.The utility model is simple in structure, and is easy to make, with low cost, and result of use is good.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model.
Embodiment
The embodiment of the utility model: the structure of the automatic control device of sequence batch (treatment process under non-DO state is as shown in Figure 1; Comprise aeration automatic control device 1 (aeration automatic control device 1 adopts the PLC of embedded intelligent control program); On aeration automatic control device 1, be connected with influent quality acquisition parameter collector, flooding velocity meter 2, upper control machine 3 (upper control machine 3 is the supervisory control computer of enterprise and relevant device), VFC cabinet 4, gas blower 5 (gas blower 5 is generally two, but also can be provided with more as required) and effluent quality monitor 6; VFC cabinet 4 is connected with gas blower 5; Influent quality acquisition parameter collector comprises COD detector 7, BOD detector 8 and ammonia-nitrogen content detector 9.
In the course of the work, sewage is when getting into the aerated reaction pond, and COD detector 7, BOD detector 8 and ammonia-nitrogen content detector 9 detect influent quality parameter (comprising COD value, BOD value and ammonia-nitrogen content), simultaneously, and flooding velocity meter 2 metering water inlet volumes; More than the parameter of metering is delivered directly in the aeration automatic control device 1; After calculating through aeration automatic control device 1 embedded intelligent control program, obtain aeration time of origin, aeration concluding time, Aeration fan running frequency and operation platform number, ST, strain the drain time of water time and returned sluge or excess sludge.
Like this, just can the most reasonably carry out aeration in the time period, improve the efficient of aeration, reduce the energy consumption of aeration according to the water quality parameter and the flooding quantity parameter control gas blower 5 of water inlet.Not with the DO value as controlled variable, avoided the error brought owing to hysteresis quality and other inaccuracy of controlled variable, effectively raise energy-saving effect.
Claims (3)
1. the automatic control device of a sequence batch (treatment process under non-DO state; Comprise aeration automatic control device (1), it is characterized in that: on aeration automatic control device (1), be connected with influent quality acquisition parameter collector, flooding velocity meter (2), VFC cabinet (4), gas blower (5) and effluent quality monitor (6); VFC cabinet (4) is connected with gas blower (5).
2. the automatic control device of sequence batch (treatment process according to claim 1 under non-DO state is characterized in that: on aeration automatic control device (1), be connected with upper control machine (3).
3. the automatic control device of sequence batch (treatment process according to claim 1 under non-DO state is characterized in that: influent quality acquisition parameter collector comprises COD detector (7), BOD detector (8) and ammonia-nitrogen content detector (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205192461U CN202358957U (en) | 2011-12-13 | 2011-12-13 | Automatic control device for sequencing batch processing process in non-DO state |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205192461U CN202358957U (en) | 2011-12-13 | 2011-12-13 | Automatic control device for sequencing batch processing process in non-DO state |
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| Publication Number | Publication Date |
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| CN202358957U true CN202358957U (en) | 2012-08-01 |
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| CN2011205192461U Expired - Lifetime CN202358957U (en) | 2011-12-13 | 2011-12-13 | Automatic control device for sequencing batch processing process in non-DO state |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491507A (en) * | 2011-12-13 | 2012-06-13 | 西部水务集团(贵州)有限公司 | Method and device of automatic control for sequencing batch type treatment process at non-DO state |
| CN110436609A (en) * | 2019-08-01 | 2019-11-12 | 合肥通用机械研究院有限公司 | A kind of Intellectualized sewage water processing aeration control method with self-learning function |
-
2011
- 2011-12-13 CN CN2011205192461U patent/CN202358957U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491507A (en) * | 2011-12-13 | 2012-06-13 | 西部水务集团(贵州)有限公司 | Method and device of automatic control for sequencing batch type treatment process at non-DO state |
| CN110436609A (en) * | 2019-08-01 | 2019-11-12 | 合肥通用机械研究院有限公司 | A kind of Intellectualized sewage water processing aeration control method with self-learning function |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120801 |