CN214734774U - High-efficiency aeration biochemical system based on DO and MLSS monitoring - Google Patents
High-efficiency aeration biochemical system based on DO and MLSS monitoring Download PDFInfo
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- CN214734774U CN214734774U CN202021635934.XU CN202021635934U CN214734774U CN 214734774 U CN214734774 U CN 214734774U CN 202021635934 U CN202021635934 U CN 202021635934U CN 214734774 U CN214734774 U CN 214734774U
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- 238000005273 aeration Methods 0.000 title claims abstract description 14
- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 46
- 238000005276 aerator Methods 0.000 claims abstract description 40
- 239000010802 sludge Substances 0.000 claims abstract description 40
- 238000010992 reflux Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000005339 levitation Methods 0.000 claims 2
- 230000008859 change Effects 0.000 abstract description 5
- 239000000725 suspension Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 239000010865 sewage Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001706 oxygenating effect Effects 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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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- Activated Sludge Processes (AREA)
Abstract
The utility model relates to a high-efficient aeration biochemical system based on DO and MLSS monitoring, include: the system comprises an air blower, a microporous aerator, a PLC automatic control device, a DO tester, an adjusting valve, a sludge reflux pump and an MLSS tester, wherein the microporous aerator is arranged at the bottom of an aerobic tank and the bottom of a facultative tank and is connected with an air outlet of the air blower through a gas conveying pipeline; a DO tester is arranged at the water outlet of the aerobic tank; arranging a DO tester in the facultative tank; regulating valves are arranged on branch pipes of the gas conveying pipeline, which are arranged in the aerobic tank and the facultative tank; an MLSS tester is arranged at the water outlet of the aerobic tank; arranging an MLSS tester in the facultative tank; the branch pipes of the sludge return pipeline, which are arranged on the aerobic tank and the facultative tank, are provided with regulating valves. The utility model discloses can be according to the amount of wind of the variable intelligent regulation air-blower of DO number, according to the rotational speed and the aperture of water yield, governing valve of the automatic control sludge reflux pump of MLSS number change, degree of automation is high, energy-conserving effectual, the data precision is high.
Description
Technical Field
The utility model relates to a high-efficient aeration biochemical system based on DO and MLSS monitoring belongs to sewage treatment technical field.
Background
In the sewage treatment process, the aerobic tank is the most important link in the biochemical treatment process, continuous aeration is needed, and the DO (dissolved oxygen) value in the aerobic tank is usually controlled to be 0.5-5.0mg/L and the DO value in the facultative tank is controlled to be 0.2-0.5 mg/L. If the DO value is too low, the oxidation of organic matters is incomplete, and the treatment effect is poor; if the DO value is too high, energy consumption is wasted and the aging of the activated sludge is accelerated.
Usually, the MLSS (sludge concentration) value in the aerobic tank and the facultative tank is controlled to be 1000-5000 mg/L. If the MLSS value is too low, the oxidation of organic matters is incomplete, and the treatment effect is poor; if the MLSS value is too high, energy consumption is wasted, and activated sludge aging is accelerated.
At present, the quality and quantity of inlet water of a plurality of sewage treatment plants fluctuate greatly in different time periods, the working condition of an air blower is single, the accurate control of sewage biochemical treatment cannot be realized, and DO (DO) values and MLSS (MLSS) DO not reach the standard or energy waste is caused.
Disclosure of Invention
Aiming at the existing technical defects in the biochemical stage of the sewage treatment plant, the utility model provides a high-efficiency aeration biochemical system based on DO and MLSS monitoring. By collecting and monitoring DO value and MLSS value of sewage in the aerobic tank and the facultative tank, the automatic control system (PLC) is used for intelligently adjusting the output air quantity of the air blower, the opening degree of the adjusting valve, the frequency of the sludge reflux pump and the opening degree of the adjusting valve, so that the optimal biochemical effect of each biochemical section is achieved, and reasonable air supply, sludge supply, energy conservation and consumption reduction are ensured. The utility model discloses a realize through following technical scheme:
high-efficiency aeration biochemical system based on DO and MLSS monitoring comprises: the system comprises an air blower, a first sludge microporous aerator, a second sludge microporous aerator, a PLC automatic control device, a first DO tester, a second DO tester, a first regulating valve, a second regulating valve, a sludge reflux pump, a first MLSS tester, a second MLSS tester, a third regulating valve and a fourth regulating valve.
The first microporous aerator is arranged at the bottom of the aerobic tank and is connected with the air outlet of the air blower through a first regulating valve by a gas conveying pipeline, and the second microporous aerator is arranged at the bottom of the facultative tank and is connected with the air outlet of the air blower through a second regulating valve by a gas conveying pipeline; a first DO tester is arranged at the water outlet of the aerobic tank, a second DO tester is arranged in the facultative tank, and the first DO tester, the second DO tester, the air blower, the first regulating valve and the second regulating valve are electrically connected with the PLC automatic control device. The PLC automatic control device automatically controls the rotating speed and the air volume of the air blower and the opening of the regulating valve according to the change of the DO value collected by the DO tester. The working condition of the blower is not single any more, and the purposes of optimizing the biochemical effect of the aerobic biochemical section and saving energy are achieved.
The sludge reflux pump is communicated with the secondary sedimentation tank through a sludge reflux pipeline, a branch pipeline of the sludge reflux pipeline is arranged at the inlet of the aerobic tank, and a fourth regulating valve is arranged on the branch pipeline; a branch pipeline of a sludge return pipeline is arranged at the inlet of the facultative tank, and a third regulating valve is arranged on the branch pipeline; and a second MLSS tester is arranged in the aerobic tank, a first MLSS tester is arranged in the facultative tank, and the second MLSS tester, the first MLSS tester, the sludge reflux pump, the third regulating valve and the fourth regulating valve are respectively and electrically connected with the PLC automatic control device. The PLC automatic control device automatically controls the rotating speed and the water quantity of the sludge reflux pump and the opening of the regulating valve according to the change of the MLSS value collected by the MLSS tester, so that the working condition of the sludge reflux pump is not single any more, and the purposes of optimizing the biochemical effect of the aerobic biochemical section and saving energy are achieved.
When the monitored MLSS value of the aerobic tank is lower than a preset low value in the PLC automatic control system, the opening of an adjusting valve of the aerobic tank is increased; when the monitored MLSS value of the aerobic tank is higher than a preset high value in the PLC automatic control system, the opening of an adjusting valve of the aerobic tank is reduced;
when the monitored MLSS value of the facultative tank is lower than a preset low value in the PLC automatic control system, the opening degree of an adjusting valve of the facultative tank is increased; when the monitored MLSS value of the facultative tank is higher than a preset high value in the PLC automatic control system, the opening degree of an adjusting valve of the facultative tank is reduced;
when the opening degrees of the regulating valves of the aerobic tank and the facultative tank are both reduced to preset values, the frequency of the sludge reflux pump is reduced; and when the opening degrees of the regulating valves of the aerobic tank and the facultative tank reach full ranges and MLSS still does not reach a preset value, the frequency of the sludge reflux pump is increased.
Preferably, the first microporous aerator and the second microporous aerator are suspension chain type microporous aerators, or lifting type microporous aerators, or fixed type microporous aerators, so that the oxygenation efficiency of the aerators is improved.
Preferably, the air blower is a magnetic suspension air blower or an air suspension air blower, so that the energy-saving efficiency is improved.
Preferably, the signals transmitted to the PLC automatic control device by the first DO tester and the second DO tester are current signals, and the rotating speed of the air blower and the opening degree of the regulating valve are automatically controlled through the current signals.
Preferably, the signals transmitted to the PLC automatic control device by the first MLSS tester and the second MLSS tester are current signals, and the rotating speed of the sludge reflux pump is automatically controlled through the current signals.
Compared with the prior art, the beneficial effects of the utility model are that:
the high-efficiency intelligent aeration system can intelligently adjust the air volume of the air blower and the opening degree of the adjusting valve according to the change of the DO value, and can also intelligently adjust the water volume of the sludge reflux pump and the opening degree of the adjusting valve according to the change of the MLSS value, so that the high-efficiency intelligent aeration system is high in automation degree, good in energy-saving effect and high in data precision.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are illustrative of some embodiments of the invention, and that those skilled in the art will be able to derive other drawings without inventive step from these drawings, which are within the scope of the present application.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure, 1-a blower, 2-a first microporous aerator, 3-a PLC automatic control device, 4-a first DO tester, 5-a second DO tester, 6-a first regulating valve, 7-a second regulating valve, 8-an aerobic tank, 9-a facultative tank, 10-a gas conveying pipeline, 11-a second microporous aerator, 12-a sludge return pipeline, 13-a first MLSS tester, 14-a second MLSS tester, 15-a third regulating valve, 16-a fourth regulating valve, 17-a secondary sedimentation tank and 18-a sludge return pump.
Detailed Description
The invention will now be further described by way of non-limiting examples with reference to the accompanying drawings:
as shown in fig. 1, is a schematic structural diagram of an embodiment of the present invention. A high-efficiency aeration biochemical system based on DO and MLSS monitoring comprises: the aerobic tank 8, the bottom of the aerobic tank 8 is provided with a first microporous aerator 2, which is used for oxygenating the aerobic tank 8 to ensure the dissolved oxygen; a branch pipeline of the sludge return pipeline 12 is arranged at the inlet of the aerobic tank 8, and a fourth regulating valve 16 is arranged on the branch pipeline and is used for injecting sludge into the aerobic tank 8 to ensure that the concentration of the sludge is in a proper range.
The facultative tank 9, there is the second microporous aerator 11 in the bottom of the said facultative tank 9, used for oxygenating in the aerobic tank 9, guarantee the dissolved oxygen amount; a branch pipeline of a sludge return pipeline 12 is arranged at the inlet of the facultative tank 9, and a third regulating valve 15 is arranged on the branch pipeline and used for injecting sludge into the aerobic tank 9 to ensure that the concentration of the sludge is in a proper range.
The micro-pore aerator 2 can adopt a suspension chain type micro-pore aerator, a lifting type micro-pore aerator or a fixed type micro-pore aerator. Compared with the traditional process, the operation cost of the suspension chain type microporous aerator or the lifting type microporous aerator or the fixed type microporous aerator is saved by about 35 to 45 percent, the treatment effect is good, the effluent quality is stable, the aerobic tank does not need to be drained during maintenance and repair, and the first microporous aerator 2 and the second microporous aerator 11 can be taken out from the aerobic tank 8 and the facultative tank 9 on the water surface.
The first microporous aerator 2 is connected with the air outlet of the air blower 1 through a first adjusting valve 6 and a gas conveying pipeline 10, and the second microporous aerator 11 is connected with the air outlet of the air blower 1 through a second adjusting valve 7 and the gas conveying pipeline 10. The air blower 1 can adopt a magnetic suspension air blower or an air suspension air blower. The blower 1 is used for providing an air source, and the air is sent to the first microporous aerator 2 and the second microporous aerator 11 through the air conveying pipeline 10 to improve the oxygen content of the sewage in the aerobic tank 8 and the facultative tank 9. The magnetic suspension air blower or the air suspension air blower is an efficient, energy-saving and environment-friendly product, has the characteristics of no contact wear, no lubrication, no oil pollution and no maintenance, and is a substitute of the traditional air blower. Compared with the traditional fan, the magnetic suspension fan saves energy by 15-25%.
And a first DO tester 4 is arranged at the water outlet of the aerobic tank 8 and is used for detecting the oxygen content (namely DO value) of the water outlet of the aerobic tank 8.
A second DO tester 5 is provided in the facultative tank 9 for detecting the oxygen content (i.e., DO value) at the effluent of the facultative tank 9.
A second MLSS tester 14 is provided in the aerobic tank 8 for detecting the sludge concentration (i.e., MLSS value) of the aerobic tank 8.
A first MLSS tester 13 is provided in the facultative tank 9 for detecting the sludge concentration (i.e., the MLSS value) of the facultative tank 9.
The first DO tester 4, the second DO tester 5, the second MLSS tester 14 and the first MLSS tester 13 are respectively electrically connected with the PLC automatic control device 3, and the first DO tester 4, the second DO tester 5, the second MLSS tester 14 and the first MLSS tester 13 convert collected monitoring data into current signals and transmit the current signals to the PLC automatic control device 3.
The PLC automatic control device 3 is electrically connected with the air blower 1, the first regulating valve 6 and the second regulating valve 7, the PLC automatic control device 3 automatically controls the operating frequency of the air blower 1 and the opening degrees of the first regulating valve 6 and the second regulating valve 7 according to current signals transmitted by the first DO tester 4 and the second DO tester 5, so that the oxygenation efficiency of the first microporous aerator 2 and the second microporous aerator 11 is controlled, and the DO values in the aerobic tank 8 and the facultative tank 9 are finally controlled in an ideal state, so that the aerobic biochemical section achieves the optimal biochemical effect.
The PLC automatic control device 3 is electrically connected with the sludge reflux pump 18, the third regulating valve 15 and the fourth regulating valve 16, and the PLC automatic control device 3 automatically controls the opening of the fourth regulating valve 16 according to a current signal transmitted by the second MLSS tester 14; the opening degree of the third regulating valve 15 is automatically controlled according to the current signal transmitted by the first MLSS tester 13; when the two regulating valves are fully opened and cannot meet the set requirement, the frequency of the sludge reflux pump 18 is increased, and finally the MLSS values in the aerobic tank 8 and the facultative tank 9 are controlled in an ideal state, so that the aerobic biochemical section achieves the optimal biochemical effect.
Other parts in this embodiment are the prior art, and are not described herein again.
Finally, it is to be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (5)
1. High-efficiency aeration biochemical system based on DO and MLSS monitoring is characterized by comprising: the system comprises an air blower (1), a first microporous aerator (2), a PLC automatic control device (3), a first DO tester (4), a second DO tester (5), a first regulating valve (6), a second regulating valve (7), a second microporous aerator (11), a sludge reflux pump (18), a first MLSS tester (13), a second MLSS tester (14), a third regulating valve (15) and a fourth regulating valve (16);
the first microporous aerator (2) is arranged at the bottom of the aerobic tank (8) and is connected with the air outlet of the air blower (1) through a first regulating valve (6) by a gas conveying pipeline (10), and the second microporous aerator (11) is arranged at the bottom of the facultative tank (9) and is connected with the air outlet of the air blower (1) through a second regulating valve (7) by the gas conveying pipeline (10); a first DO tester (4) is arranged at the water outlet of the aerobic tank (8), a second DO tester (5) is arranged in the facultative tank (9), and the first DO tester (4), the second DO tester (5), the blower (1), the first regulating valve (6) and the second regulating valve (7) are electrically connected with the PLC automatic control device (3);
the sludge reflux pump (18) is communicated with the secondary sedimentation tank (17) through a sludge reflux pipeline (12), a branch pipeline of the sludge reflux pipeline (12) is arranged at the inlet of the aerobic tank (8), and a fourth regulating valve (16) is arranged on the branch pipeline; a branch pipeline of a sludge return pipeline (12) is arranged at an inlet of the facultative tank (9), and a third regulating valve (15) is arranged on the branch pipeline; a second MLSS tester (14) is arranged in the aerobic tank (8), a first MLSS tester (13) is arranged in the facultative tank (9), and the second MLSS tester (14), the first MLSS tester (13), the third regulating valve (15), the fourth regulating valve (16) and the sludge reflux pump (18) are respectively and electrically connected with the PLC automatic control device (3).
2. The DO and MLSS monitoring-based high-efficiency aeration biochemical system according to claim 1, wherein the first micro-porous aerator (2), the second micro-porous aerator (11) is a suspended chain micro-porous aerator, or a liftable micro-porous aerator, or a fixed micro-porous aerator.
3. The DO and MLSS monitoring based high-efficiency aerated biochemical system according to claim 2, wherein the blower (1) is a magnetic levitation blower or an air levitation blower.
4. The biochemical system for high efficiency aeration based on DO and MLSS monitoring of claim 3, wherein the signals transmitted to the PLC autonomous device (3) from the first DO tester (4) and the second DO tester (5) are current signals.
5. The biochemical DO and MLSS monitoring based high efficiency aeration system according to claim 1, wherein the signals transmitted by the second MLSS tester (14), the first MLSS tester (13) to the PLC autonomous device (3) are current signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021635934.XU CN214734774U (en) | 2020-08-07 | 2020-08-07 | High-efficiency aeration biochemical system based on DO and MLSS monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021635934.XU CN214734774U (en) | 2020-08-07 | 2020-08-07 | High-efficiency aeration biochemical system based on DO and MLSS monitoring |
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| CN214734774U true CN214734774U (en) | 2021-11-16 |
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| CN202021635934.XU Active CN214734774U (en) | 2020-08-07 | 2020-08-07 | High-efficiency aeration biochemical system based on DO and MLSS monitoring |
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Effective date of registration: 20240410 Address after: No.2269 Kaifa Road, high tech Zone, Jinan City, Shandong Province Patentee after: Shandong Hongyuan Environmental Protection Technology Co.,Ltd. Country or region after: China Address before: No.2269 Kaifa Road, high tech Zone, Jinan City, Shandong Province Patentee before: SHANDONG SWAN WATER ENGINEERING Co.,Ltd. Country or region before: China Patentee before: Shandong Hongyuan Environmental Protection Technology Co.,Ltd. |
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