CN109534493A - A kind of the aeration precise control system and its control method of sewage treatment - Google Patents
A kind of the aeration precise control system and its control method of sewage treatment Download PDFInfo
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- CN109534493A CN109534493A CN201910042268.4A CN201910042268A CN109534493A CN 109534493 A CN109534493 A CN 109534493A CN 201910042268 A CN201910042268 A CN 201910042268A CN 109534493 A CN109534493 A CN 109534493A
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- 238000005273 aeration Methods 0.000 title claims abstract description 141
- 239000010865 sewage Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000001301 oxygen Substances 0.000 claims abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000004090 dissolution Methods 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 4
- 238000005276 aerator Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Classifications
-
- 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
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses the aeration precise control systems and its control method of a kind of sewage treatment, including multiple ponds CAST, blower control, aeration general pipeline, multiple liquid level sensors, dissolution oxygen detecting sensor and master controller；Wherein, one end of above-mentioned each aeration general pipeline and the output of blower control connect, the other end of each aeration general pipeline is connected with a single pond aeration primary branch, the part in the corresponding pond CAST is protruded on each single pond aeration primary branch is respectively connected with more single pond aeration branched pipes, multiple single pond aeration plates are connected on each aeration branched pipe, flowmeter is connected on each aeration general pipeline, single pond aerating regulation valve is connected in the part that each single pond aeration primary branch stretches out the pond CAST, branch's pressure detector is connected in the part that each single pond aeration primary branch stretches out the pond CAST, a stagnation pressure force detector is connected between all aeration branched pipes.The present invention improves detection accuracy.
Description
Technical field
The present invention relates to a kind of technical field of accurate control, the aeration precise control systems of especially a kind of sewage treatment
And its control method.
Background technique
Aeration link in sewage treatment is that CAST biodegrade technique (is expressed as loop cycle active sludge treatment work
Skill) key link, therefore the quality of aeration control directly affects CAST bioactivity and the biodegradability to sewage；
And the air blower of aerating system gas source supply arrangement is the main energy consumption equipment of sewage treatment plant, if finely regulating CAST biology drops
Technique aeration is solved, is able to achieve energy-saving.And current CAST technique causes to be aerated due to controlling using more pond body intermittent aeratings
Control relatively complicated, every group of pond body state of the art is different, and the especially more pond bodies of single source of the gas are aerated simultaneously, leads to tolerance condition
Complexity, this is poorly controlled to be easy to cause air blower to feel suffocated surge and injury device, so in order to be directed to the more pond body systems of single source of the gas,
Existing control mode mostly uses the aeration intake valve in artificial regulatory blower air quantity or the pond CAST, causes to regulate and control timeliness poor,
In addition when the pond CAST quantity is more, it is easy to appear surge phenomenon, aeration between more ponds is caused to be easy to happen uneven distribution etc. now
As causing part pond body aeration quantity that cannot fully meet, eventually leading to bioactivity reduction, it is therefore desirable to improve.
Summary of the invention
The aeration that a kind of sewage treatment is provided the purpose of the present invention is to solve above-mentioned the deficiencies in the prior art is accurate
Control system and its control method.The present invention realizes the aeration control of automatic and accurate, improves regulation timeliness；In addition it also solves more
How pond body day part is to ensuring blower system safety in the case of oxygen different demands；It also solves to overcome each pond in more pond bodies
The problem of body biological variability and aerator difference, finally ensures more pond bodies aeration uniformity simultaneously；To guarantee accurate control
The aeration quantity in the pond CAST, final the advantages of realizing energy saving of system consumption reduction.
To achieve the goals above, the aeration precise control system of a kind of sewage treatment designed by the present invention, including one
A above pond CAST, further includes with lower component:
One blower control by atmospheric compressed formation aeration gas source；
One or more aeration general pipeline；
It is identical as the pond CAST number and be individually placed to correspond to the liquid level sensor in each pond CAST；
It is identical as the pond CAST number and be individually placed to correspond to the dissolution oxygen detecting sensor in each pond CAST；
One for carrying out the master controller of accurate aeration control to each pond CAST；
Wherein, one end of above-mentioned each aeration general pipeline and the output of blower control connect, and each is aerated the another of general pipeline
One end is connected with single pond aeration primary branch that a root portion is extend into a corresponding pond CAST, and each single pond is aerated primary branch
On protrude into the part in the corresponding pond CAST be respectively connected with one or more single pond aeration branched pipe, on each aeration branched pipe
It is connected with more than one single pond aeration plate, is connected with flowmeter on each aeration general pipeline, in each single pond aeration master
The part that branch pipe stretches out the pond CAST is connected with single pond aerating regulation valve, stretches out the portion in the pond CAST in each single pond aeration primary branch
Split-phase is connected with branch's pressure detector for the rear of single pond aerating regulation valve, is connected with one between all aeration branched pipes
A stagnation pressure force detector, and branch's pressure detector, stagnation pressure force detector, single pond aerating regulation valve, flowmeter, liquid level pass
Sensor and dissolution oxygen detecting sensor are connect with master controller signal.
Further, in order to improve aeration effect, the list pond aeration plate is located at the liquid level in the pond CAST or less and close to bottom of pond.
Further, for the convenience of adjusting, the list pond aerating regulation valve is at a slow speed adjusting of the full opening/closing time more than the second
Type regulating valve.
Further for convenient for operation, the blower control is the remote control type air blower of adjustable air quantity.
Further, data are improved and monitors effect in real time, be connected on single pond aerating regulation valve for monitoring single pond aeration
The on-line monitoring instrument of disk forefront pressure, and the on-line monitoring instrument is connect with blower control.
The invention also discloses a kind of control methods of the aeration precise control system of sewage treatment, it is characterised in that specific
The following steps are included:
A. rising for each pond CAST is preset to expose Pdnset value and completely expose pressure Pdnset value and air blower trouble free service
Two-way pressure limit value；
B. then using a week as a cycle, exist in single pond aerating regulation valve that is required to for first day set in each period
Aeration initial opening size when this period first day aeration；
C. branch's pressure detecting of the pond each CAST Chi Zhongdan aerating regulation valve rear end installation is then obtained in real time by master controller
Device obtains the branch pressure detection value Pn in corresponding each pond, while obtaining the liquid in each pond CAST in real time by master controller
Then the numerical value of level sensor calculates this pond aeration plate according to formula-as the level value Leveln in the corresponding pond CAST
Inlet and outlet pressure difference:
Pdn=Pn-Leveln (1-1)
N indicates the label in the corresponding pond CAST in above-mentioned formula；
D. the opening value Vn that the corresponding single pond aerating regulation valve in each pond is controlled further according to inlet and outlet pressure difference Pdn, then will open
Angle value Vn is sent into corresponding single pond aerating regulation valve the Real-time intensity that single pond aeration is controlled with this, then by Pdnset < Pdn
< Shi Zuowei limited aeration mode；Pdn > Pdnset > conduct is completely aerated mode；
E. the air header pressure value P Z of valve opening value Vn and the detection of stagnation pressure force detector is then aerated to control according to each pond
Blower system air output and combined operation: after single pond aeration valve opening value Vn is close to full scale and is deferred to setting time,
Judge whether PZ reaches upper safety limit at this time, not up to upper safety limit adjusts air blower at a slow speed gradually then to increase air blower outlet air
Pressure value P Z；When single pond aeration valve opening value Vn is during reduction, whether detection judges PZ already close to reaching in safety
Limit if forbidding being aerated valve regulation close to upper safety limit is reached, and gradually adjusts air blower reduction air blower outlet air pressure value
PZ restores when upper safety limit pressure is greater than security settings threshold value with PZ difference again to aeration valve regulation；When each pond dissolved oxygen reaches
When to setting value and being more than that the time is stablized in setting, then gradually adjust blower export pressure value P Z downwards at a slow speed, final realization essence
Really control.
Further, in order to improve the precision of monitoring, need to preset the aeration initial opening in this period in step
Mode is to obtain all aeration values in upper period in real time by master controller, and the aeration valve for then calculating a period is averagely opened
Aeration initial opening of the angle value as this period, then further according to the dissolved oxygen DoIT in the pond CAST after, by using PID or mould
Paste control is aerated next aeration of the magnitude as initial aeration value to automatically adjust the single of single pond aerating regulation valve in each pond
Value.
Further, data are inquired for the ease of the later period, master controller carries out detection data each time real in step
When store.
The aeration precise control system and its control method for a kind of sewage treatment that the present invention obtains, realize automatic and accurate
Aeration control improves regulation timeliness；In addition more pond body day parts are also solved to how ensuring to rouse in the case of oxygen different demands
Blower fan system safety；Also solve the problems, such as to overcome each pond body biological variability and aerator difference in more pond bodies, it is final true
Protect more pond bodies aeration uniformity simultaneously；It is final to realize the excellent of energy saving of system consumption reduction to guarantee the aeration quantity in the accurate control pond CAST
Point.
Detailed description of the invention:
Fig. 1 is a kind of structural schematic diagram of the aeration precise control system of sewage treatment in embodiment 1；
Fig. 2 is a kind of flow diagram of the control method of the aeration precise control system of sewage treatment in embodiment 1.
In appended drawing reference: the pond CAST 1, blower control 2, aeration general pipeline 3, liquid level sensor 4, dissolved oxygen detection sensing
Device 5, master controller 6, single pond are aerated primary branch 7, single pond aeration branched pipe 8, single pond aeration plate 9, single pond aerating regulation valve 10, divide
Branch pressure detector 11, stagnation pressure force detector 12, flowmeter 13, on-line monitoring instrument 14.
Specific embodiment
Innovation and creation are described further below with reference to embodiment.
Embodiment 1:
As shown in Figure 1 and Figure 2, the aeration precise control system of a kind of sewage treatment provided in this embodiment, including it is more than one
The pond CAST 1 further includes with lower component:
One blower control 2 by atmospheric compressed formation aeration gas source；
One or more aeration general pipeline 3；
It is identical as 1, the pond CAST number and be individually placed to correspond to the liquid level sensor 4 in each pond CAST 1；
It is identical as 1, the pond CAST number and be individually placed to correspond to the dissolution oxygen detecting sensor 5 in each pond CAST 1；
One for carrying out the master controller 6 of accurate aeration control to each pond CAST 1；
Wherein, one end of above-mentioned each aeration general pipeline 3 is connect with the output of blower control 2, and each is aerated general pipeline's 3
The other end is connected with single pond aeration primary branch 7 that a root portion is extend into a corresponding pond CAST 1, each single pond aeration master
The part protruded into the corresponding pond CAST 1 on branch pipe 7 is respectively connected with one or more single pond aeration branched pipe 8, is aerated at each
It is connected with more than one single pond aeration plate 9 on branched pipe, flowmeter 13 is connected on each aeration general pipeline 3, each
The part that root list pond aeration primary branch 7 stretches out the pond CAST 1 is connected with single pond aerating regulation valve 10, is aerated main branch in each single pond
The part that pipe 7 stretches out the pond CAST 1 is connected with branch's pressure detector 11 relative to the rear of single pond aerating regulation valve 10, all
Be connected with a stagnation pressure force detector 12 between aeration branched pipe, and branch's pressure detector 11, stagnation pressure force detector 12,
Single pond aerating regulation valve 10, flowmeter 13, liquid level sensor 4 and dissolution oxygen detecting sensor 5 connect with 6 signal of master controller
It connects.
Further, in order to improve aeration effect, list pond aeration plate 9 is located at the liquid level in the pond CAST 1 or less and close to pond
Bottom.
Further, for the convenience of adjusting, the list pond aerating regulation valve 10 for full opening/closing time at 90 seconds or more at a slow speed
Adjustment type regulating valve.
Further for convenient for operation, the blower control 2 is the remote control type air blower of adjustable air quantity.
Further, data are improved and monitors effect in real time, be connected on single pond aerating regulation valve 10 and exposed for monitoring single pond
The on-line monitoring instrument 14 of 9 forefront pressure of gas disk, and the on-line monitoring instrument 14 is connect with blower control 2.
The invention also discloses a kind of control methods of the aeration precise control system of sewage treatment, it is characterised in that specific
The following steps are included:
A. it presets rising for each pond CAST 1 and exposes Pdnset1 value and completely exposure pressure Pdnset2 value and air blower trouble free service
Two-way pressure limit value；
B. then using a week as a cycle, it is required within first day set single pond aerating regulation valve 10 in each period
Aeration initial opening size in this period first day aeration；
C. branch's pressure of aerating regulation valve 10 rear end installation in single pond in each pond CAST 1 is then obtained in real time by master controller 6
Detector 11 obtains the branch pressure detection value Pn in corresponding each pond, while obtaining each CAST in real time by master controller 6
Then the numerical value of liquid level sensor 4 in pond 1 is calculated as the level value Leveln in the corresponding pond CAST 1 according to formula (1-1)
The inlet and outlet pressure difference of this pond aeration plate out:
Pdn=Pn-Leveln (1-1)
N indicates the label in the corresponding pond CAST 1 in above-mentioned formula；Such as have 2 when answering the pond CAST, P is used respectively1,P2It indicates, such as schemes
Shown in 1；
D. the opening value Vn that the corresponding single pond aerating regulation valve 10 in each pond is controlled further according to inlet and outlet pressure difference Pdn, then will
Opening value Vn is sent into corresponding single pond aerating regulation valve 10 Real-time intensity that single pond aeration is controlled with this, then will
As limited aeration mode when Pdnset1 < Pdn < 0；By Pdn > Pdnset2 > 0 as completely aeration mode；
E. the air header pressure value P Z that valve opening value Vn and stagnation pressure force detector 12 detect then is aerated to control according to each pond
Blower system air output processed and combined operation: when single pond, aeration valve opening value Vn close to full scale and is deferred to setting time
Afterwards, judge whether PZ reaches upper safety limit at this time, not up to upper safety limit adjusts air blower at a slow speed gradually then to increase air blower
Outlet air pressure value P Z；When single pond aeration valve opening value Vn during reduction, detection judge PZ whether already close to reach pacify
The full upper limit if forbidding being aerated valve regulation close to upper safety limit is reached, and gradually adjusts air blower reduction air blower and goes out wind pressure
Force value PZ restores when upper safety limit pressure is greater than security settings threshold value with PZ difference again to aeration valve regulation；When each pond dissolved oxygen
When reaching setting value and stablizing the time more than setting, then gradually adjust blower export pressure value P Z downwards at a slow speed, finally in fact
Now accurate control.
Further, in order to improve the precision of monitoring, need to preset the aeration initial opening in this period in step 2
Mode is to obtain all aeration values in upper period in real time by master controller 6, and the aeration valve for then calculating a period is average
Aeration initial opening of the opening value as this period, then further according to the dissolved oxygen DoIT in the pond CAST 1 after, by using PID
Or fuzzy control is aerated magnitude as the next of initial aeration value to automatically adjust the single of single pond aerating regulation valve 10 in each pond
A aeration value.
Further, data are inquired for the ease of the later period, master controller 6 carries out detection data each time in step 3
Storage in real time.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill
For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from spirit of the invention or
In the case where essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention
It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of aeration precise control system of sewage treatment, including the more than one pond CAST (1), it is characterised in that further include
With lower component:
One blower control (2) by atmospheric compressed formation aeration gas source；
One or more aeration general pipeline (3)；
It is identical as the pond CAST (1) number and be individually placed to correspond to the liquid level sensor (4) in each pond CAST (1)；
It is identical as the pond CAST (1) number and be individually placed to correspond to the dissolution oxygen detecting sensor (5) in each pond CAST (1)；
One for carrying out the master controller (6) of accurate aeration control to each pond CAST (1)；
Wherein, one end of above-mentioned each aeration general pipeline (3) is connect with the output of blower control (2), and each aeration is total
The other end of pipe (3) is connected with single pond aeration primary branch (7) that a root portion is extend into a corresponding pond CAST (1), each
Single pond aeration branch that the part in the corresponding pond CAST (1) is respectively connected with one or more is protruded on root list pond aeration primary branch (7)
It manages (8), more than one single pond aeration plate (9) is connected on each aeration branched pipe, on each aeration general pipeline (3)
Flowmeter (13) are connected with, single pond aeration is connected in the part that each single pond aeration primary branch (7) stretches out the pond CAST (1) and adjusts
It saves valve (10), stretches out the part of the pond CAST (1) relative to single pond aerating regulation valve (10) in each single pond aeration primary branch (7)
Rear be connected with branch's pressure detector (11), be connected with a stagnation pressure force detector between all aeration branched pipes
(12), and branch's pressure detector (11), stagnation pressure force detector (12), single pond aerating regulation valve (10), flowmeter (13),
Liquid level sensor (4) and dissolution oxygen detecting sensor (5) are connect with master controller (6) signal.
2. the aeration precise control system of a kind of sewage treatment according to claim 1, which is characterized in that the list pond
Aeration plate (9) is located at the liquid level in the pond CAST (1) or less and close to bottom of pond.
3. a kind of aeration precise control system of sewage treatment according to claim 1 or 2, which is characterized in that the list
Pond aerating regulation valve (10) is at a slow speed adjustment type regulating valve of the full opening/closing time at 90 seconds or more.
4. a kind of aeration precise control system of sewage treatment according to claim 1 or 2, which is characterized in that the drum
Controller of fan (2) is the remote control type air blower of adjustable air quantity.
5. a kind of aeration precise control system of sewage treatment according to claim 1 or 2, which is characterized in that in Dan Chi
The on-line monitoring instrument (14) for monitoring single pond aeration plate (9) forefront pressure is connected on aerating regulation valve (10), and described
On-line monitoring instrument (14) connect with blower control (2).
6. a kind of aeration precise control system of sewage treatment according to claim 3, which is characterized in that exposed in single pond
The on-line monitoring instrument (14) for monitoring single pond aeration plate (9) forefront pressure is connected in gas regulating valve (10), and described
On-line monitoring instrument (14) is connect with blower control (2).
7. a kind of aeration precise control system of sewage treatment according to claim 4, which is characterized in that be aerated in single pond
Be connected with the on-line monitoring instrument (14) for monitoring single pond aeration plate (9) forefront pressure in regulating valve (10), and it is described
Line measuring instrument (14) is connect with blower control (2).
8. a kind of control method of the aeration precise control system of sewage treatment, it is characterised in that specifically includes the following steps:
It presets rising for each pond CAST (1) and exposes Pdnset1 value and completely exposure pressure Pdnset2 value and air blower trouble free service
Two-way pressure limit value；
Then using a week as a cycle, it is required within first day set single pond aerating regulation valve (10) in each period
Aeration initial opening size in this period first day aeration；
Then the branch of single pond aerating regulation valve (10) rear end installation in each pond CAST (1) is obtained in real time by master controller (6)
Pressure detector (11) obtains the branch pressure detection value Pn in corresponding each pond, while being obtained in real time by master controller (6)
Take the numerical value of the liquid level sensor (4) in each pond CAST (1) as the level value Leveln in corresponding the pond CAST (1), then root
The inlet and outlet pressure difference of this pond aeration plate is calculated according to formula 1-1:
Pdn=Pn-Leveln (1-1)
N indicates the label of corresponding pond CAST (1) in above-mentioned formula；
The opening value Vn that the corresponding single pond aerating regulation valve (10) in each pond is controlled further according to inlet and outlet pressure difference Pdn, then will
Opening value Vn is sent into corresponding single pond aerating regulation valve (10) Real-time intensity that single pond aeration is controlled with this, then will
As limited aeration mode when Pdnset1 < Pdn < 0；By Pdn > Pdnset2 > 0 as completely aeration mode；
Then the air header pressure value P Z of valve opening value Vn and stagnation pressure force detector (12) detection is aerated according to each pond to control
Blower system air output processed and combined operation: when single pond, aeration valve opening value Vn close to full scale and is deferred to setting time
Afterwards, judge whether PZ reaches upper safety limit at this time, not up to upper safety limit adjusts air blower at a slow speed gradually then to increase air blower
Outlet air pressure value P Z；When single pond aeration valve opening value Vn during reduction, detection judge PZ whether already close to reach pacify
The full upper limit if forbidding being aerated valve regulation close to upper safety limit is reached, and gradually adjusts air blower reduction air blower and goes out wind pressure
Force value PZ restores when upper safety limit pressure is greater than security settings threshold value with PZ difference again to aeration valve regulation；When each pond dissolved oxygen
When reaching setting value and stablizing the time more than setting, then gradually adjust blower export pressure value P Z downwards at a slow speed, finally in fact
Now accurate control.
9. a kind of control method of the aeration precise control system of sewage treatment according to claim 8, feature exist
In the mode for needing to preset the aeration initial opening in this period in step 2 is obtained in real time by master controller (6)
All aeration values in period, the aeration valve opening value that is averaged for then calculating a period are initially opened as the aeration in this period
Degree, then further according to the dissolved oxygen DoIT in the pond CAST (1) after, each pond is automatically adjusted by using PID or fuzzy control
Next aeration value of the single aeration magnitude of single pond aerating regulation valve (10) as initial aeration value.
10. a kind of control method of the aeration precise control system of sewage treatment according to claim 8, feature exist
In master controller (6) stores detection data each time in real time in step 3.
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| CN201910042268.4A CN109534493B (en) | 2019-01-17 | 2019-01-17 | Sewage treatment aeration precise control system and control method thereof |
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| CN201910042268.4A CN109534493B (en) | 2019-01-17 | 2019-01-17 | Sewage treatment aeration precise control system and control method thereof |
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| CN109534493A true CN109534493A (en) | 2019-03-29 |
| CN109534493B CN109534493B (en) | 2021-09-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115364528A (en) * | 2022-09-16 | 2022-11-22 | 世韩(天津)节能环保科技有限公司 | Thickener and solid-liquid separation method thereof |
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| CN115364528A (en) * | 2022-09-16 | 2022-11-22 | 世韩(天津)节能环保科技有限公司 | Thickener and solid-liquid separation method thereof |
| CN115364528B (en) * | 2022-09-16 | 2024-07-23 | 世韩(天津)节能环保科技有限公司 | Thickener and solid-liquid separation method thereof |
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