CN201999834U - Device for controlling aeration rate of aerobic tank in A2/O system in frequency conversion manner - Google Patents
Device for controlling aeration rate of aerobic tank in A2/O system in frequency conversion manner Download PDFInfo
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- CN201999834U CN201999834U CN2011200709715U CN201120070971U CN201999834U CN 201999834 U CN201999834 U CN 201999834U CN 2011200709715 U CN2011200709715 U CN 2011200709715U CN 201120070971 U CN201120070971 U CN 201120070971U CN 201999834 U CN201999834 U CN 201999834U
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- aeration
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- concentration
- aerobic tank
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Abstract
The utility model relates to a device controlling aeration rate of an aerobic tank in A2/O system in a frequency conversion manner, wherein DO concentration sensors are respectively arranged at the front end and the rear end of the aerobic tank, and are connected with DO testers; a gas flowmeter and a pressure transmitter are respectively arranged on a gas inlet pipeline of the aerobic tank; the DO testers, the gas flowmeter and the pressure transmitter are respectively connected with a computer; the computer is connected with a process control device; a frequency converter is arranged in the process control device, and is connected with a blower; and the blower is connected with an aeration pipeline of the aerobic tank. In the utility model, the blower is adjusted in the frequency conversion manner and the water with quality reaching the standard can be discharged, the utilization ratio of dissolved oxygen can be improved and the aeration quantity is saved; in addition, flow rate of the aeration pipeline is taken as a parameter for adjusting the aeration quantity, so that the phenomenon that the aeration quantity can not satisfy the aeration requirement is avoided, and the treated water is up to the standard for discharging.
Description
Technical field
The utility model relates to technical field of sewage, particularly a kind of A
2/ O system Aerobic Pond aeration rate frequency-converting control device.
Background technology
In recent years, China has built up a large amount of sewage works and has brought into play huge effect aspect reduction pollutant emission, the protection water surrounding.And energy consumption is big, working cost high be restriction these built up sewage work and brought into play the bottleneck that it should have effect, wherein energy expenditure has accounted for about 60% of Sewage Plant overall running cost.Under the situation of current global energy shortage, seeking energy-optimised strategy, reducing energy consumption is the only way of sewage disposal Sustainable development.
At present, China municipal sewage plant mostly is the second-stage treatment factory that adopts activated sludge process, A greatly
2Technologies such as/O, oxidation ditch, SBR and modification thereof are widely used in Sewage Plant, and its energy expenditure is 0. 2 ~ 0.3 kWh/m
3In Sewage Plant, energy expenditure mainly concentrates on sewage pump room and blast aeration machine room, and the two accounts for more than 70% of full factory energy consumption.And in town sewage second-stage treatment system, the energy consumption maximum of aeration oxygen supply accounts for 50% of total system total energy consumption.Therefore, reducing the aeration oxygen-consumption is the energy-saving and cost-reducing key link of urban wastewater treatment firm.
For gas blower, the electric energy of input mainly is to the aeration tank oxygen supply, also play the effect that mixes simultaneously, but the aeration aerating process of at present domestic most of B-grade sewage treatment plant still adopts uncontrollable Root's blower or centrifugal blower, aeration whole process full power load operation does not reach the best consumption level of energy.In the B-grade sewage treating processes, for energy efficient, usually the method that is adopted is according to the needs of dissolved oxygen in the aeration tank wind speed, air quantity to be controlled and regulated adapting to the variation of operation condition, and control device commonly used at present is to adjust the wind speed air quantity by the size of damper, baffle opening.Like this, no matter the aeration rate size, blower fan is all wanted full-speed operation, unnecessary aeration is then consumed by the throttling loss of air door, baffle plate, not only control accuracy is restricted, but also causes a large amount of energy dissipations and equipment loss, thereby causes cost of sewage disposal to increase.
The quality of aeration Controlling System will have a direct impact the removal and the running cost of pollutent in the sewage disposal.The optimization system pattern is carried out rationally economic regulation and control to aeration rate, can be used as system optimization and energy-conservation point of penetration, becomes the effective ways and the approach that reduce sewage work's working cost.
Summary of the invention
The purpose of this utility model is by to A in the B-grade sewage treatment system
2The gas blower operation scheme of Aerobic Pond is adjusted in/O the system, improve the efficiency of oxygen supply of aerating system, and introduced the controlled variable of blower frequency, guaranteeing under the situation up to standard of effluent quality after the second-stage treatment as the operation of regulation and control gas blower, save working cost, cut down the consumption of energy.
For achieving the above object, the utility model provides a kind of A
2/ O system Aerobic Pond aeration rate frequency-converting control device, this device comprises computer, process controller, first gas blower, second gas blower, a DO concentration sensor, the 2nd DO concentration sensor, a DO concentration determination instrument and the 2nd DO concentration determination instrument, and a described DO concentration sensor is connected with a DO concentration determination instrument, the 2nd DO concentration determination instrument respectively with the 2nd DO concentration sensor;
Described process controller is provided with first frequency transformer and second frequency transformer, and first frequency transformer is connected with second gas blower with first gas blower respectively with second frequency transformer, is used for controlling required aeration rate;
First gas meter and first pressure unit on the gas pipe line of described first gas blower, the gas pipe line of second gas blower is provided with second gas meter and second pressure unit, take place in order to detect unusual phenomenoies such as whether pipeline leakage, valve leak, aeration head obstruction are arranged, so that in time take measures;
A described DO concentration determination instrument, the 2nd DO concentration determination instrument, first gas meter, second gas meter, first pressure unit all are connected with computer with second pressure unit.
Compared with prior art, the utlity model has following advantage:
1) reduces aeration rate, improve the dissolved oxygen utilising efficiency, conserve energy.
In the utility model, Aerobic Pond is divided into two districts respectively by two independent air feed of gas blower, dissolved oxygen concentration scope to a district and anoxic pond in computer is set, (Aerobic Pond leading portion) dissolved oxygen scope is 2.5 ~ 3.5mg/L in a district, the concentration of two districts (Aerobic Pond end) dissolved oxygen then according to the oxygen-starved area in the dissolved oxygen scope (0.2 ~ 0.5mg/L) determines.
In traditional aeration tank, because gas blower carries out air feed according to design load all the time, and reduce gradually from leading portion to terminal Pollutant levels in the Aerobic Pond, required dissolved oxygen is also corresponding to be reduced gradually along Aerobic Pond pond length, this just may cause Aerobic Pond leading portion aeration deficiency, and the excessive phenomenon of terminal aeration takes place.The utility model can reduce invalid aeration according to dissolved oxygen concentration change dynamics control aeration rate, thereby reduces aeration rate, conserve energy.
In addition, by two-film theory, DO concentration is more little in the water, and the impellent that oxygen shifts is big more, E
AAlso high more.When DO is zero, E
AMaximum, the E when DO is 1mg/L
AReduce by 10% when zero; Reduce by 40% during than 4mg/L.Therefore, from cutting down the angle of aeration oxygen-consumption, under the situation of dissolved oxygen demand, DO concentration is low more good more in keeping the aeration tank.The utility model can be controlled aeration rate according to the dissolved oxygen concentration change dynamics, thereby has improved the dissolved oxygen utilising efficiency.
2) in conjunction with two parameters of gas flow rate in dissolved oxygen concentration in the Aerobic Pond and the aerating pipelines, the aeration flow is realized dynamically control, in conserve energy, can also guarantee treating water water quality.
In the utility model, on the aerating pipelines of gas blower connection Aerobic Pond, be provided with gas meter, it can arrive computer with the data transmission of aeration flow, the caliber to aerating pipelines is set in computer, just can calculate the gas flow rate of aerating pipelines like this after obtaining this parameter of aeration flow.In the aeration in sewage treatment system design, gas feed flow rate to aerating pipelines is stipulated, wherein require the gas feed flow rate of air main will be within the scope of 10 ~ 15m/s, this scope is set in computer in advance, the airline flow velocity and the set(ting)value that calculate are compared, satisfy this condition as if the flow velocity that draws by the aeration flow rate calculation and then continue aeration, then will not carry out variable frequency adjustment to the aeration flow again, perhaps shorten aeration time if do not satisfy.
Description of drawings
Fig. 1 is a kind of A that contains the utility model Aerobic Pond aeration rate frequency-converting control device
2/ O system schematic.
Fig. 2 is Aerobic Pond aeration rate frequency-converting control device figure of the present utility model.
Fig. 3 is an Aerobic Pond aeration rate variable frequency control schema of the present utility model.
Among Fig. 1, the 1-pond that intakes, 2-anaerobic pond, the 3-anoxic pond, 4-Aerobic Pond, 5-settling tank, the 6-computer, 7-process controller, 8-first frequency transformer, 9-second frequency transformer, 10-first gas blower, 11-second gas blower, 12-first gas meter, 13-first pressure unit, 14-second gas meter, 15-second pressure unit, 16-the 3rd DO concentration sensor, 17-the 3rd DO concentration determination instrument, 18-the one DO concentration sensor, 19-the one DO concentration determination instrument, 20-the 2nd DO concentration sensors, 21-the 2nd DO concentration determination instrument, the 22-water pump of intaking.
Embodiment
Embodiment 1:
Fig. 1 is the A with the utility model Aerobic Pond aeration rate frequency-converting control device
2/ O system schematic, this device comprise into water pond 1, A
2/ O pond, settling tank 5, first gas blower 10 and second gas blower 11, computer 6 and process controller 7, wherein, water inlet pond 1 and A
2/ O pond is connected, A
2/ O pond is connected with settling tank 5, computer 6 one ends are connected with second pressure unit 15 with the 3rd DO determinator 17, a DO determinator 19, the 2nd DO determinator 21, first gas meter 12, second gas meter 14, first pressure unit 13, the other end is connected A with process controller 7
2/ O pond comprises anaerobic pond 2, anoxic pond 3 and Aerobic Pond 4, and process controller 7 is connected with second gas blower 11 with first gas blower 10, and first gas blower 10 is connected with Aerobic Pond 4 with second gas blower 11; The 3rd DO concentration sensor 16 is located in the anoxic pond 3, the one DO concentration sensor 18 is located in the Aerobic Pond 4 and is located at close water outlet one end in the Aerobic Pond 4 near water-in one end, the 2nd DO concentration sensor 20, and the 3rd DO concentration sensor 16, a DO concentration sensor 18, the 2nd DO concentration sensor 20 inside are connected with the 3rd DO concentration determination instrument 17, a DO concentration determination instrument 19, the 2nd DO concentration determination instrument 21 respectively; The gas pipe line of first gas meter 12 and first pressure unit, 13, the second gas blowers 11 is provided with second gas meter 14 and second pressure unit 15 on the gas pipe line of described first gas blower 10.
At first, start into water water pump 22, the water in the water inlet pond 1 is pumped into A
2In/O the pond, first gas blower 10 and second gas blower 11 are by the design load blast aeration, after treating that the stable water outlet of settling tank 5 is up to standard, start frequency-converting control device 7, the 3rd DO concentration determination instrument 17, a DO concentration determination instrument 19, the 2nd DO concentration determination instrument 21 are transferred to computer 6 with the DO concentration value in anoxic pond and the Aerobic Pond and analyze, and first gas meter 12 and second gas meter 14 and first pressure unit 13 and second pressure unit 15 carry out computational analysis with respective data transfer to computer 6 simultaneously.
In computer 6, the DO concentration range that anoxic pond 3 is set is 0.2 ~ 0.5mg/L, and Aerobic Pond 4 leading portion DO concentration ranges are 2.5 ~ 3.5mg/L, and the aerating pipelines flow velocity is 10 ~ 15m/s.
Determinator is with the input interface input of determination data by computer 6, if the DO concentration of anoxic pond 3 (in 0.2 ~ 0.5mg/L), is not then reacted at setting range; If not in setting range, and the time was above 15 minutes, then send instruction and give process controller 7 by computer 6, regulate the frequency of second gas blower 11 step by step to adjust the aeration rate of Aerobic Pond 4 by second frequency transformer 9 that is arranged in the process controller 7 near water outlet one end, this computer-chronograph receives the data of being come by the transmission of second gas meter 14 and the flow velocity of aerating pipelines is calculated, if flow velocity (in 10 ~ 15m/s), is not then reacted at setting range; If not in setting range, and continue 5 minutes, then kept former aeration flow 30 minutes, adjusting aeration rate by the frequency that changes second gas blower 11 afterwards makes flow velocity in setting range, after keeping 30 minutes, the DO concentration by anoxic pond 3 continues to adjust aeration rate, so circulation again.
Computer 6 is analyzed these data, if the DO concentration value of Aerobic Pond 4 leading portions (in 2.5 ~ 3.5mg/L), is not then reacted at setting range after receiving the next data of Aerobic Pond 4 transmission; If not in setting range, and the time surpass 15 minutes, then send instruction and give process controller 7 by computer 6, adjust the frequency of first gas blower 10 step by step to adjust aeration rate in setting range by first frequency transformer 8 that is arranged on wherein.Thereafter similar with anoxic pond 3, promptly computer 6 is according to the next data computation pipeline flow velocity of first gas meter, 12 transmission, if (in 10 ~ 15m/s), then do not react at setting range; If not in setting range, and continue 5 minutes, then kept original aeration rate 30 minutes, adjust aeration rate afterwards again and make flow velocity in setting range, keep 30 minutes after, regulate aeration by Aerobic Pond 4 leading portion DO data again, so circulation.
For the data that are conveyed into by first pressure transmission device 13 and second pressure unit 15 in the computer, with itself and conventional value comparison, as if finding this data rapid drawdown or rising sharply, then will analyze reason, it mainly is to take place in order to detect unusual phenomenoies such as whether pipeline leakage, valve leak, aeration head obstruction are arranged.
Embodiment 2:
Fig. 2 is A of the present utility model
2/ O system Aerobic Pond aeration rate frequency-converting control device, this device comprises computer 6, process controller 7, first gas blower 10, second gas blower 11, a DO concentration sensor 18, the 2nd DO concentration sensor 20, a DO concentration determination instrument 19 and the 2nd DO concentration determination instrument 21, and a described DO concentration sensor 18 is connected with a DO concentration determination instrument 19, the 2nd DO concentration determination instrument 21 respectively with the 2nd DO concentration sensor 20; The one DO concentration sensor 18 is located in the Aerobic Pond 4 and is located in the Aerobic Pond 4 near water outlet one end near water-in one end, the 2nd DO concentration sensor 20.
Described process controller 7 is provided with first frequency transformer 8 and second frequency transformer 9, first frequency transformer 8 is connected with second gas blower 11 with first gas blower 10 respectively with second frequency transformer 9, and first frequency transformer 8 and second frequency transformer 9 are used for controlling the aeration rate of first gas blower 10 and second gas blower 11; The gas pipe line of first gas blower 10 is connected with close water-in one end in the Aerobic Pond 4, and second gas blower 11 gets gas pipe line and is connected with close water outlet one ends in the Aerobic Pond 4.
A described DO concentration determination instrument 19, the 2nd DO concentration determination instrument 21, first gas meter 12, second gas meter 14, first pressure unit 13 all are connected with computer 6 with second pressure unit 15.
Claims (1)
1. A
2/ O system Aerobic Pond aeration rate frequency-converting control device, it is characterized in that: this device comprises computer (6), process controller (7), first gas blower (10), second gas blower (11), a DO concentration sensor (18), the 2nd DO concentration sensor (20), a DO concentration determination instrument (19) and the 2nd DO concentration determination instrument (21), and a described DO concentration sensor (18) is connected with a DO concentration determination instrument (19), the 2nd DO concentration determination instrument (21) respectively with the 2nd DO concentration sensor (20);
Described process controller (7) is provided with first frequency transformer (8) and second frequency transformer (9), and first frequency transformer (8) is connected with second gas blower (11) with first gas blower (10) respectively with second frequency transformer (9);
First gas meter (12) and first pressure unit (13) on the gas pipe line of described first gas blower (10), the gas pipe line of second gas blower (11) is provided with second gas meter (14) and second pressure unit (15);
A described DO concentration determination instrument (19), the 2nd DO concentration determination instrument (21), first gas meter (12), second gas meter (14), first pressure unit (13) and second pressure unit (15) all are connected with computer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200709715U CN201999834U (en) | 2011-03-17 | 2011-03-17 | Device for controlling aeration rate of aerobic tank in A2/O system in frequency conversion manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200709715U CN201999834U (en) | 2011-03-17 | 2011-03-17 | Device for controlling aeration rate of aerobic tank in A2/O system in frequency conversion manner |
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| Publication Number | Publication Date |
|---|---|
| CN201999834U true CN201999834U (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200709715U Expired - Fee Related CN201999834U (en) | 2011-03-17 | 2011-03-17 | Device for controlling aeration rate of aerobic tank in A2/O system in frequency conversion manner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176483A (en) * | 2013-04-09 | 2013-06-26 | 北京国环清华环境工程设计研究院有限公司 | Method and system for controlling aeration quantity of membrane tank |
| CN106219739A (en) * | 2016-04-08 | 2016-12-14 | 江苏天雨环保集团有限公司 | Multiple spot variable aeration amount intelligent integral complete set of equipments and control method thereof |
| CN107265625A (en) * | 2017-08-22 | 2017-10-20 | 河海大学 | A kind of highlands aerating system and aeration method |
-
2011
- 2011-03-17 CN CN2011200709715U patent/CN201999834U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176483A (en) * | 2013-04-09 | 2013-06-26 | 北京国环清华环境工程设计研究院有限公司 | Method and system for controlling aeration quantity of membrane tank |
| CN103176483B (en) * | 2013-04-09 | 2015-07-08 | 北京国环清华环境工程设计研究院有限公司 | Method for controlling aeration quantity of membrane tank |
| CN106219739A (en) * | 2016-04-08 | 2016-12-14 | 江苏天雨环保集团有限公司 | Multiple spot variable aeration amount intelligent integral complete set of equipments and control method thereof |
| CN107265625A (en) * | 2017-08-22 | 2017-10-20 | 河海大学 | A kind of highlands aerating system and aeration method |
| CN107265625B (en) * | 2017-08-22 | 2020-08-25 | 河海大学 | Plateau area aeration system and aeration method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20140317 |