CN107265625A - A kind of highlands aerating system and aeration method - Google Patents
A kind of highlands aerating system and aeration method Download PDFInfo
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- CN107265625A CN107265625A CN201710724868.XA CN201710724868A CN107265625A CN 107265625 A CN107265625 A CN 107265625A CN 201710724868 A CN201710724868 A CN 201710724868A CN 107265625 A CN107265625 A CN 107265625A
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- aeration
- highlands
- dissolved oxygen
- aerator
- sensor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/006—Regulation methods for biological treatment
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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
Abstract
The invention discloses a kind of highlands aerating system and aeration method, including aerator and aeration tank, it is characterized in that, also include the control system and sensor assembly for being used to control aerator aeration quantity, the control system includes slave computer and frequency converter, and the sensor assembly includes baroceptor, temperature sensor and dissolved oxygen sensor；The baroceptor, temperature sensor and dissolved oxygen sensor are connected with slave computer respectively, slave computer is sequentially connected frequency converter and aerator again, the temperature sensor and dissolved oxygen sensor are used to gather the sewage temperature T and dissolved oxygen data in aeration tank, and the baroceptor is used for the actual atmospheric pressure P of collection site.Advantage：Certain optimization improvement need to be only carried out on the original aerator of sewage treatment plant and is suitable for the low and unstable external environment condition of highlands air pressure, good aeration effect is reached；The problem of solving highly energy-consuming in aeration process；Safeguard and cost is low, floor space is few.
Description
Technical field
The present invention relates to a kind of highlands aerating system and method, more particularly to one kind can be outside automatic detection highlands
The aerating system and method for portion's air pressure, temperature and dirty dissolved oxygen in water and real-time monitoring, belong to technical field of sewage.
Background technology
Among traditional sewage disposal process by activated sludge process process, aerating system does not influence microorganism in sludge still
The essential elements of growth, are also high energy consumption unit, account for the 50%-70% of the power consumption of sewage treatment plant's day-to-day operation, therefore aeration
The scientific and reasonable operation of system becomes the important factor of sewage treatment plant's Effec-tive Function.Conventional aeration mode is divided into mechanical exposure
Gas and blast aeration, mechanical aeration produce violent water by the impeller quick rotation in aeration tank, the vigorous agitation water surface
Jump, so that the oxygen in air is transferred in water body；Blast aeration is that by pipe-line system compressed air is delivered into bottom of pond
Air-diffuser, to be diffused into the form of bubble in water body, the oxygen included in bubble is quickly transferred in water body, supply
The demand of various microorganisms in activated sludge.Nowadays the aeration control system of sewage treatment plant uses ICA technologies mostly
(Instrumentation, control and automation, i.e. instrument-control-automation), is passed through according to substantial amounts of operation
Test parameter and automatic, accurate, scientific and reasonable regulation is carried out to aeration link, make stable effluent quality up to standard, saving energy consumption, reduce
Manually give pre-.
With inland plain from different places, oxygen content is low in highlands height above sea level, atmospheric pressure and air, and year for highlands
Temperature on average is relatively low, often occurs that aerator aeration quantity is excessive or not enough in sewage treatment plant's operation of highlands
Situation, the treatment effect and energy for having a strong impact on sewage treatment plant is used, therefore sewage treatment plant's blast aeration of highlands
The selection of amount can not be referring again to inland plain area, need to be according to the external environment condition of highlands " three-lows " come Reasonable adjustment aeration system
System.
There is problems with the existing highlands sewage treatment plant aerating system overwhelming majority：
1st, most of sewage treatment plant aerating system still follows the aeration empirical data of plains region, causes biological treatment rank
Section efficiency is low, and sludge quantity is big；
2nd, temperature is relatively low or increase aeration quantity during unstable air pressure simply, and aerator is frequently adjusted, made
Into energy consumption increase, service life of equipment reduction.
The content of the invention
The technical problems to be solved by the invention are that the defect for overcoming prior art is aerated there is provided a kind of highlands is provided
System and method, with aeration tank dissolved oxygen in automatic detection highlands external pressure, temperature and sewage and real-time Reasonable Regulation And Control
Aerator system, significantly save power consumption and operating cost, be mainly used in technical field of sewage.
In order to solve the above technical problems, the present invention provides a kind of highlands aerating system, including aerator and exposure
Gas pond, it is characterized in that, in addition to for controlling the control system and sensor assembly of aerator aeration quantity, the control system
System includes slave computer and frequency converter, and the sensor assembly includes baroceptor, temperature sensor and dissolved oxygen sensor；
The baroceptor, temperature sensor and dissolved oxygen sensor are connected with slave computer respectively, and slave computer connects successively again
Connect frequency converter and aerator, sewage temperature T that the temperature sensor and dissolved oxygen sensor are used to gather in aeration tank and molten
Oxygen data, the baroceptor is used for the actual atmospheric pressure P of collection site.
Further, the slave computer is embedded with highlands aeration model.
A kind of aeration method of highlands aerating system, it is characterized in that, comprise the following steps：
Step one, real atmosphere pressure P and sewage temperature T is gathered, slave computer is conveyed to；
Step 2, slave computer is aerated model by highlands and calculated, and obtains sewage treatment plant's aeration standard oxygenation
Amount, and send instruction, the aeration quantity of the original aerator of regulation sewage treatment plant to frequency converter；
Actual dissolved oxygen data feedback, to host computer, enters in sewage after dissolved oxygen sensor in step 3, aeration tank will be aerated
Row monitoring in real time.
Further, the highlands aeration model, sets two groups of threshold temperature T in modelmax=30 DEG C, Tmin=
5 DEG C, Pmax=0.80 × 105Pa, Pmin=0.55 × 105pa；
The first step, by theoretical formula Csw=P/1.013 × (477.8/T+32.26), it is molten that calculating obtains sewage surface saturation
Solve oxygen concentration Csw, unit is mg/L；Wherein, P is the real atmosphere pressure collected, and unit is hPa, and T is the sewage collected
Temperature, unit is K；
Second step, by theoretical formula Csm=Csw(Ot/ 42+ (P+0.1H)/2.068), calculating obtains aerator under water
Depth average dissolution oxygen concentration Csm, unit is mg/L；Wherein, H is that aerator has water surface distance, and unit is m, OtFor from exposure
Oxygen content percentage, O in gas at gas pond onet=21 (1-EA)/79+21(1-EA), EAFor oxygen transfer efficiency, 20-35% is taken；
3rd step, by theoretical formula N0=0.8N (0.9Csm-C0)/Cs×1.024(T-20), it is fast that calculating obtains standard oxygen transfer
Rate N0, wherein N is actual oxygen transfer rate, and unit is kgO2Actual amount of oxygen needed for/h, i.e. sewage treatment plant's aerating system,
Calculated according to sewage treatment plant's specific process parameter, N0For standard oxygen transfer rate, unit is kgO2/ h, C0For mixed liquor
Remaining dissolved oxygen value, obtains 2mg/L, CsFor saturated dissolved oxygen in clear water under standard conditions, 9.17mg/L is taken；
4th step, is calculated by theoretical formula A=P × M/R × (273.15+T)/1.22 and obtains oxygen content in air A, wherein M
For air molecule amount, it is gas constant to take 28.95, R, takes 0.082；
5th step, B=N0/ A is calculated and is obtained highlands standard oxygenation capacity, respectively in TmaxAnd PminAnd TminAnd PmaxTwo
Calculated under limits and obtain BmaxAnd Bmin。
Further, the highlands standard oxygenation capacity is divided into three ranks, with reference to sewage treatment plant's biochemical treatment
Number of components and aerator number, set three different aeration ranks of frequency converter, and grade more high-strength aeration is bigger, and respectively one
Level aeration quantity, i.e., 0 are to (Bmax+Bmin)/3, two grades of aeration quantity, i.e. (Bmax+Bmin(the B of)/3 to 2max+Bmin)/3, three-level aeration quantity,
It is more than 2 (Bmax+Bmin)/3。
Further, the pressure sensor, temperature sensor were at interval of 2 hours transmission primaries data, if model is calculated
Obtained standard oxygenation capacity still in the grade that minimax critical value equivalence is divided, then keeps the frequency size of frequency converter not
Become, corresponded to if upgrade or downgrade and change frequency converter frequency；Dissolved oxygen sensor is every dissolved oxygen data in half an hour feedback aeration tank.
A kind of highlands aerating system and aeration method are applied in technical field of sewage.
The beneficial effect that the present invention is reached：
1st, the aerating system that the present invention is designed need to only be set without additionally purchasing aeration equipment in the original aeration of sewage treatment plant
The standby upper optimization improvement carried out necessarily is suitable for the low and unstable external environment condition of highlands air pressure, reaches good aeration effect
Really；
2nd, the problem of solving highly energy-consuming in aeration process, three-level aeration quantity is set, and serves good adjustment effect, is solved
The hysteresis quality for conventional sewage plants dissolved oxygen control system of having determined, without the frequently aerator such as regulation air blower, while full
Under conditions of foot nitrification completely, energy consumption is reduced to the full extent, and then reduces process operation cost, extends the use of equipment
Life-span；
3rd, safeguard and cost is low, floor space is few.
Brief description of the drawings
Fig. 1 is aerating system operational module flow chart；
Fig. 2 is aerating system structure chart；
Fig. 3 is aerating system logical calculated block diagram.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
As Figure 1-3, a kind of highlands aerating system, including aerator and aeration tank, it is characterized in that, also wrap
The control system and sensor assembly for controlling aerator aeration quantity are included, the control system includes slave computer and frequency conversion
Device, the sensor assembly includes baroceptor, temperature sensor and dissolved oxygen sensor；
The baroceptor, temperature sensor and dissolved oxygen sensor are connected with slave computer respectively, and slave computer connects successively again
Connect frequency converter and aerator, sewage temperature T that the temperature sensor and dissolved oxygen sensor are used to gather in aeration tank and molten
Oxygen data, the baroceptor is used for the actual atmospheric pressure P of collection site.
In the present embodiment, the slave computer is embedded with highlands aeration model.
A kind of aeration method of highlands aerating system, it is characterized in that, comprise the following steps：
Step one, real atmosphere pressure P and sewage temperature T is gathered, slave computer is conveyed to；
Step 2, slave computer is aerated model by highlands and calculated, and obtains sewage treatment plant's aeration standard oxygenation
Amount, and send instruction, the aeration quantity of the original aerator of regulation sewage treatment plant to frequency converter；
Actual dissolved oxygen data feedback, to host computer, enters in sewage after dissolved oxygen sensor in step 3, aeration tank will be aerated
Row monitoring in real time.
In the present embodiment, the highlands is aerated model, sets two groups of threshold temperature T in modelmax=30 DEG C, Tmin
=5 DEG C, Pmax=0.80 × 105Pa, Pmin=0.55 × 105pa；
The first step, by theoretical formula Csw=P/1.013 × (477.8/T+32.26), it is molten that calculating obtains sewage surface saturation
Solve oxygen concentration Csw(mg/L)；Wherein, P is the real atmosphere pressure (hPa) collected, and T is the sewage temperature (K) collected；
Second step, by theoretical formula Csm=Csw(Ot/ 42+ (P+0.1H)/2.068), calculating obtains aerator under water
Depth average dissolution oxygen concentration Csm(mg/L)；Wherein, H is aerator tool water surface distance (m), OtFor from gas at aeration tank one
Oxygen content percentage %, O in bodyt=21 (1-EA)/79+21(1-EA), EAFor oxygen transfer efficiency, 20-35% is typically taken；
3rd step, by theoretical formula N0=0.8N (0.9Csm-C0)/Cs×1.024(T-20), it is fast that calculating obtains standard oxygen transfer
Rate N0, wherein N is actual oxygen transfer rate (kgO2/ h), i.e. actual amount of oxygen needed for sewage treatment plant's aerating system, according to dirty
Water treatment plant's specific process parameter is calculated, N0For standard oxygen transfer rate (kgO2/ h), C0For the remaining dissolved oxygen of mixed liquor
Value, obtains 2mg/L, CsFor saturated dissolved oxygen in clear water under standard conditions, 9.17mg/L is taken；
4th step, is calculated by theoretical formula A=P × M/R × (273.15+T)/1.22 and obtains oxygen content in air A, wherein M
For air molecule amount, it is gas constant to take 28.95, R, takes 0.082 (no unit guiding principle amount)；
4th step, B=N0/ A is calculated and is obtained highlands standard oxygenation capacity, respectively in TmaxAnd PminAnd TminAnd PmaxTwo
Calculated under limits and obtain BmaxAnd Bmin；
In the present embodiment, the highlands standard oxygenation capacity is divided into three ranks, at sewage treatment plant's biochemistry
Number of components and aerator number are managed, three different aeration ranks of frequency converter are set, grade more high-strength aeration is bigger, is respectively
One-level aeration quantity, i.e., 0 are to (Bmax+Bmin)/3, two grades of aeration quantity, i.e. (Bmax+Bmin(the B of)/3 to 2max+Bmin)/3, three-level aeration
Amount, i.e., more than 2 (Bmax+Bmin)/3。
In the present embodiment, the pressure sensor, temperature sensor were at interval of 2 hours transmission primaries data, if model meter
Obtained standard oxygenation capacity still in the grade that minimax critical value equivalence is divided, then keeps the frequency size of frequency converter not
Become, corresponded to if upgrade or downgrade and change frequency converter frequency；Dissolved oxygen sensor is every dissolved oxygen data in half an hour feedback aeration tank.
A kind of highlands aerating system and aeration method are applied in technical field of sewage.
Case study on implementation：
The aerating system is made up of baroceptor, temperature sensor, dissolved oxygen sensor, control system etc., control system
Mainly include slave computer, frequency converter etc., and be connected with sewage treatment plant former aerator；During operation, first by air pressure, temperature
The real atmosphere pressure and temperature that Sensor monitoring is arrived, is input to the slave computer in control system, according to being nested in slave computer
Highlands aeration model obtain standard oxygenation capacity, and three ranks will be divided into, with reference to sewage treatment plant's biochemical treatment group
Fraction and aerator number, set three different aeration ranks of frequency converter, and grade more high-strength aeration is bigger, respectively one-level
Aeration quantity, i.e., 0 are to (Bmax+Bmin)/3, two grades of aeration quantity, i.e. (Bmax+Bmin(the B of)/3 to 2max+Bmin)/3, three-level aeration quantity is big
In 2 (Bmax+Bmin)/3；
Then, slave computer sends instruction to frequency converter, and the exposure of sewage treatment plant's aerator is regulated and controled according to the grade of division
Tolerance, after operation a period of time, the dissolved oxygen sensor in aeration tank is supervised in real time to actual dissolved oxygen data in sewage after regulation and control
Survey and feed back to host computer；Pressure, temperature sensor were at interval of 2 hours transmission primaries data, if model calculates obtained standard
Oxygenation capacity still minimax critical value equivalence divide grade in, then keep frequency converter frequency size it is constant, if upgrading or
Degrade then to correspond to and change frequency converter frequency；Dissolved oxygen sensor is every dissolved oxygen data in half an hour feedback aeration tank.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these improve and deformed
Also it should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of highlands aerating system, including aerator and aeration tank, it is characterized in that, in addition to for controlling aeration
The control system and sensor assembly of device aeration quantity, the control system include slave computer and frequency converter, the sensor
Module includes baroceptor, temperature sensor and dissolved oxygen sensor；
The baroceptor, temperature sensor and dissolved oxygen sensor are connected with slave computer respectively, and slave computer is sequentially connected change again
Frequency device and aerator, the temperature sensor and dissolved oxygen sensor are used to gather the sewage temperature T and dissolved oxygen number in aeration tank
According to the baroceptor is used for the actual atmospheric pressure P of collection site.
2. a kind of highlands aerating system according to claim 1, it is characterized in that, the slave computer is embedded with plateau
Area is aerated model.
3. a kind of aeration method of the highlands aerating system based on claim 1-2 any one, it is characterized in that, including such as
Lower step：
Step one, real atmosphere pressure P and sewage temperature T is gathered, slave computer is conveyed to；
Step 2, slave computer is aerated model by highlands and calculated, and obtains sewage treatment plant's aeration standard oxygenation capacity, and
Instruction, the aeration quantity of the original aerator of regulation sewage treatment plant are sent to frequency converter；
Actual dissolved oxygen data feedback, to host computer, is carried out real in sewage after dissolved oxygen sensor in step 3, aeration tank will be aerated
When monitor.
4. a kind of aeration method of highlands aerating system according to claim 3, it is characterized in that, the highlands
Model is aerated, two groups of threshold temperature T in model are setmax=30 DEG C, Tmin=5 DEG C, Pmax=0.80 × 105Pa, Pmin=
0.55×105pa；
The first step, by theoretical formula Csw=P/1.013 × (477.8/T+32.26), calculating obtains sewage surface saturated dissolved oxygen
Concentration Csw, unit is mg/L；Wherein, P is the real atmosphere pressure collected, and unit is hPa, and T is the sewage temperature collected,
Unit is K；
Second step, by theoretical formula Csm=Csw(Ot/ 42+ (P+0.1H)/2.068), calculating obtains aerator depth under water
Locate average dissolution oxygen concentration Csm, unit is mg/L；Wherein, H is that aerator has water surface distance, and unit is m, OtFor from aeration tank
Oxygen content percentage in gas, O at onet=21 (1-EA)/79+21(1-EA), EAFor oxygen transfer efficiency, 20-35% is taken；
3rd step, by theoretical formula N0=0.8N (0.9Csm-C0)/Cs×1.024(T-20), calculate and obtain standard oxygen transfer rate
N0, wherein N is actual oxygen transfer rate, and unit is kgO2Actual amount of oxygen needed for/h, i.e. sewage treatment plant's aerating system, according to
Calculated according to sewage treatment plant's specific process parameter, N0For standard oxygen transfer rate, unit is kgO2/ h, C0It is surplus for mixed liquor
Remaining dissolved oxygen value, obtains 2mg/L, CsFor saturated dissolved oxygen in clear water under standard conditions, 9.17mg/L is taken；
4th step, is calculated by theoretical formula A=P × M/R × (273.15+T)/1.22 and obtains oxygen content in air A, and wherein M is sky
Gas molecular weight, it is gas constant to take 28.95, R, takes 0.082；
5th step, B=N0/ A is calculated and is obtained highlands standard oxygenation capacity, respectively in TmaxAnd PminAnd TminAnd PmaxTwo limit
Calculated under value scope and obtain BmaxAnd Bmin。
5. a kind of aeration method of highlands aerating system according to claim 4, it is characterized in that, by the plateau
Area's standard oxygenation capacity is divided into three ranks, with reference to sewage treatment plant's biochemical treatment number of components and aerator number, sets frequency converter
Three different aeration ranks, grade more high-strength aeration is bigger, and respectively one-level aeration quantity, i.e., 0 is to (Bmax+Bmin)/3, two
Level aeration quantity, i.e. (Bmax+Bmin(the B of)/3 to 2max+Bmin)/3, three-level aeration quantity, i.e., more than 2 (Bmax+Bmin)/3。
6. a kind of aeration method of highlands aerating system according to claim 4, it is characterized in that, the pressure sensing
Device, temperature sensor were at interval of 2 hours transmission primaries data, if model calculates obtained standard oxygenation capacity and still faced in minimax
In the grade that dividing value equivalence is divided, then keep the frequency size of frequency converter constant, corresponded to if upgrade or downgrade and change frequency converter
Frequency；Dissolved oxygen sensor is every dissolved oxygen data in half an hour feedback aeration tank.
7. a kind of highlands aerating system and aeration method based on claim 1-6 any one are applied in sewage disposal skill
Art field.
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| CN201710724868.XA CN107265625B (en) | 2017-08-22 | 2017-08-22 | Plateau area aeration system and aeration method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107720989A (en) * | 2017-11-26 | 2018-02-23 | 碧沃丰工程有限公司 | Water body automatic aeration system |
| CN110723819A (en) * | 2019-11-29 | 2020-01-24 | 西藏民族大学 | Method for realizing synchronous nitrogen and phosphorus removal of domestic sewage in high-altitude areas by optimally controlling aeration flow |
| CN113149243A (en) * | 2021-04-26 | 2021-07-23 | 辽宁科技学院 | Deep feedback aeration system, control system and method for sewage treatment |
| CN115196763A (en) * | 2021-04-13 | 2022-10-18 | 宜维龙环境科技(苏州)有限公司 | Underwater jet aeration device, control method thereof, terminal and storage medium |
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| CN115196763A (en) * | 2021-04-13 | 2022-10-18 | 宜维龙环境科技(苏州)有限公司 | Underwater jet aeration device, control method thereof, terminal and storage medium |
| CN113149243A (en) * | 2021-04-26 | 2021-07-23 | 辽宁科技学院 | Deep feedback aeration system, control system and method for sewage treatment |
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