CN109032195A - A kind of sewage pumping station water discharge control method - Google Patents
A kind of sewage pumping station water discharge control method Download PDFInfo
- Publication number
- CN109032195A CN109032195A CN201810842337.5A CN201810842337A CN109032195A CN 109032195 A CN109032195 A CN 109032195A CN 201810842337 A CN201810842337 A CN 201810842337A CN 109032195 A CN109032195 A CN 109032195A
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- CN
- China
- Prior art keywords
- liquid level
- pump
- sewage
- inbound traffics
- pumping station
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
Abstract
A kind of sewage pumping station water discharge control method of this hair disclosure of the invention, the present invention specifically includes 1, change increasing variable frequency pump, 2, in the level threshold of stepping, add " permanent liquid level " target value, 3, controller obtains collecting-tank liquid level information by liquidometer, the fluctuating liquid level caused by sewage inbound traffics change, level threshold is pumped more than given switch, carry out " liquid level height opens low pass " control strategy, 4, controller obtains collecting-tank liquid level information by liquidometer, the fluctuating liquid level caused by sewage inbound traffics change, when being not above given switch pump level threshold, carry out " permanent liquid level " control strategy, the present invention is on the basis of retaining traditional control method safety, pass through variable frequency pump stepless variable-flow, comply with the minor fluctuations of inbound traffics；It is pumped by switch, complies with the big fluctuation of inbound traffics, improve the fluency of sewage pumping station draining, meet the defeated dewatering needs under current " big flow, weak regulate and store, have fluctuation " situation.
Description
Technical field
The present invention relates to drainage pipeline networks sewage transport fields, more particularly, to a kind of sewage pumping station water discharge control method.
Background technique
Sewerage system is important urban infrastructure, including drainage pipeline networks and sewage treatment plant, carries city
Sanitary sewage and industrial wastewater collect, transmit and handle important task.Sewage pumping station is transfer link important in drainage pipeline networks.Pump
The collecting-tank stood plays certain pondage capacity during transfer, reduces inbound traffics variation and impacts to pump group bring.It is existing
Sewage pumping station draining generally use " liquid level height opens low pass " traditional control method, increase and decrease outflow by height of liquid level, letter
Singly and there is certain safety.
But as urbanization is grown rapidly, water consumption is soaring, and sewage quantity increases, and pipeline/pumping plant obtains certain transformation
It is promoted, and collecting-tank results in Regulation Function decrease due to the seldom dilatation of the constraints such as geographical space, environmental impact assessment, pumping plant transfers pressure
Increase.Due to entering the sewage or rainwater instability of flow of pumping plant, traditional control method easily causes pump group frequent start-stop or liquid
The problems such as surging, sewage overflow in position.
Summary of the invention
Present invention is generally directed to conventional discharge controlling parties under current sewage pumping station " big flow, weak regulate and store, have fluctuation " situation
The deficiency of method provides a kind of improved sewage pumping station water discharge control method, plays the role of steadily transferring sewage.
What the present invention was mainly addressed by following technical proposals in view of the above technical problems: a kind of sewage pumping station row
Water controling method, comprising the following steps:
Step 1 changes increasing variable frequency pump.Original general pump is transform as variable frequency pump, default working frequency P by adding frequency converter
With adjustable frequency ± Δ P.
Step 2 adds " permanent liquid level " target value in the level threshold of stepping.Set " liquid level height opens low pass " control strategy
Under, generally level threshold is determined by turn on pump number of units stepping." permanent liquid level " target value is now added, each grade of median is generally taken.
Step 3 controller obtains collecting-tank liquid level information by liquidometer, and the liquid level caused by sewage inbound traffics change becomes
It is dynamic, it is more than that given switch pumps level threshold, carries out " liquid level height opens low pass " control strategy.Start or close a water pump, opens
The water pump initialization opened is in default working frequency.
Start and stop must consider that the cumulative activation duration and work at present duration of each pump make each water pump by running in turn when pumping
The Cost Allocation working time reduces failure rate and repair rate.
Step 4 controller obtains collecting-tank liquid level information by liquidometer, and the liquid level caused by sewage inbound traffics change becomes
It is dynamic, when being not above given switch pump level threshold, carry out " permanent liquid level " control strategy.I.e. with " permanent liquid level " target of current shelves
Value is control target, is feedback with liquid level signal, closed-loop control is carried out to pump group frequency conversion, to adapt to the fluctuation of inbound traffics.
Preferred closed-loop control can take PID control or fuzzy control etc..
The present invention, by variable frequency pump stepless variable-flow, complies with inbound traffics on the basis of retaining traditional control method safety
Minor fluctuations；It is pumped by switch, complies with the big fluctuation of inbound traffics, improved the fluency of sewage pumping station draining, meet and work as
Before defeated dewatering needs under " big flow, weak regulate and store, have fluctuation " situation.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Certain sewage pumping station possesses 3 water pumps, and the model of each water pump is identical.Set " liquid level height opens low pass " control strategy:
When liquid level is increased beyond 1.9 meters, start first pump；When liquid level is increased beyond 2.1 meters, restart 1 pump, 2 pumps work at the same time；Liquid
When position is increased beyond 2.3 meters, restart 1 pump, 3 pumps work at the same time.When liquid level descends below 1.9 meters, 1 pump is closed, retains 2
Pump work；When liquid level descends below 1.7 meters, 1 pump is turned off, retains 1 pump work；When liquid level drops to 1.5 meters, 1 is turned off
Platform pump.Average daily 10.4~11.3 ten thousand tons of defeated discharge capacity of sewage, water collecting pool volume < 100 meter3, 1.15 ton/second~1.39 of sewage inbound traffics
Ton/the second, fluctuation amplitude is up to 0.24 ton/second.
A kind of sewage pumping station water discharge control method, comprising the following steps:
Step 1 changes increasing variable frequency pump.Original 3 general pumps are transform as variable frequency pump, default work frequency by adding frequency converter
Rate P and adjustable frequency ± Δ P (such as variable frequency range 40Hz~50Hz is expressed as P=45Hz, Δ P=5Hz).
Step 2 adds " permanent liquid level " target value in the level threshold of stepping.Set " liquid level height opens low pass " control strategy
Under, generally level threshold is determined by turn on pump number of units stepping." permanent liquid level " target value is now added, each grade of median is generally taken.
Here, when liquid level ascendant trend, [1.9,2.1) shelves and [2.1,2.3) shelves add 2.0 meters of " permanent liquid level " target value and 2.2 respectively
Rice；When liquid level downward trend, [2.3,1.9) shelves, [1.9,1.7) shelves and [1.7,1.5) shelves add " permanent liquid level " target value respectively
2.1 meters, 1.8 meters and 1.6 meters.
Step 3 controller obtains collecting-tank liquid level information by liquidometer, and the liquid level caused by sewage inbound traffics change becomes
It is dynamic, it is more than that given switch pumps level threshold, carries out " liquid level height opens low pass " control strategy.Start or close a water pump, opens
The water pump initialization opened is in default working frequency.
Start and stop must consider the cumulative activation duration and work at present duration of each pump when pumping, run by rotation, make each water pump
The Cost Allocation working time reduces failure rate and repair rate.
Step 4 controller obtains collecting-tank liquid level information by liquidometer, and the liquid level caused by sewage inbound traffics change becomes
It is dynamic, when being not above given switch pump level threshold, carry out " permanent liquid level " control strategy.I.e. with " permanent liquid level " target of current shelves
Value is control target, is feedback with liquid level signal, closed-loop control is carried out to pump group frequency conversion, to adapt to the fluctuation of inbound traffics.
Preferred closed-loop control can take PID control or fuzzy control etc..This example uses PID control, whole using engineering
The method of determining determines pid parameter: (1) determining proportional gain P: first removing the integral term and differential term of PID, enable integration time constant Ti=
0, derivative time constant Td=0 makes the pure proportion adjustment of PID.Input is set as the 60%~70% of the maximum value of system permission,
It is gradually increased proportional gain P by 0, until system vibrates；Again in turn, it is gradually reduced from proportional gain P at this time, until
System oscillation disappears, and records proportional gain P at this time, sets the proportional gain P of PID as the 60%~70% of current value.(2) really
After definite integral time constant Ti: proportional gain P determines, the initial value of a biggish integration time constant Ti is set, then gradually
Reduce Ti, until system vibrates, later in turn, be gradually increased Ti, until system oscillation disappears.It records at this time
Ti sets the integration time constant Ti of PID as the 150%~180% of current value.(3) derivative time constant Td is determined: with determination
The method of P and Ti is identical, takes 30% when nonoscillatory.
Embodiment is after above-mentioned improvement, and for 3 pumps when working at the same time, outflow is continuously adjustable, adjustable section [1.13 tons/second,
1.41 tons/second], meet " big flow, weak regulate and store " operating condition needs first.Secondly, PID control can overcome inbound traffics fluctuation dry in real time
It disturbs, keeps level stability, guarantee to transfer unimpeded, solve " the 3rd pump frequent start-stop, liquid level is surging, sewage overflow " etc. very well and ask
Topic, actual effect are obvious.
It is above the interest field rather than limiting the invention in order to illustrate purpose for implementation example explanation of the invention.
Claims (2)
1. a kind of sewage pumping station water discharge control method, which is characterized in that this method specifically includes the following steps:
Step 1 changes increasing variable frequency pump
Original general pump is transform as variable frequency pump, default working frequency P and adjustable frequency ± Δ P by adding frequency converter；
Step 2 adds " permanent liquid level " target value in the level threshold of stepping
Under set " liquid level height opens low pass " control strategy, level threshold is determined by turn on pump number of units stepping；Now add " permanent liquid level " mesh
Scale value takes each grade of median；
Step 3 controller obtains collecting-tank liquid level information by liquidometer, and the fluctuating liquid level caused by sewage inbound traffics change surpasses
Given switch pump level threshold is crossed, " liquid level height opens low pass " control strategy is carried out；Start or close a water pump, the water of unlatching
Initialization is pumped in default working frequency；
Start and stop must consider that the cumulative activation duration and work at present duration of each pump keep each water pump reasonable by running in turn when pumping
Share the working time, reduces failure rate and repair rate；
Step 4 controller obtains collecting-tank liquid level information by liquidometer, and the fluctuating liquid level caused by sewage inbound traffics change does not have
When having more than given switch pump level threshold, " permanent liquid level " control strategy is carried out；It is with " permanent liquid level " target value of current shelves
Target is controlled, is feedback with liquid level signal, closed-loop control is carried out to pump group frequency conversion, to adapt to the fluctuation of inbound traffics.
2. a kind of sewage pumping station water discharge control method according to claim 1, it is characterised in that: when constant liquis position control, adopt
Use closed-loop control；PID control or fuzzy control are taken in closed-loop control.
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| CN201810842337.5A CN109032195A (en) | 2018-07-27 | 2018-07-27 | A kind of sewage pumping station water discharge control method |
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| CN201810842337.5A CN109032195A (en) | 2018-07-27 | 2018-07-27 | A kind of sewage pumping station water discharge control method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111362397A (en) * | 2020-03-24 | 2020-07-03 | 苏州市排水有限公司 | Automatic control method combining constant water level and constant water volume of sewage plant |
| CN112028141A (en) * | 2020-08-14 | 2020-12-04 | 河南中烟工业有限责任公司 | Control method of waste hot water collecting equipment |
| CN112594177A (en) * | 2020-12-09 | 2021-04-02 | 福建福清核电有限公司 | Nuclear island drainage pump stability control method |
| CN113041843A (en) * | 2021-05-31 | 2021-06-29 | 金科环境股份有限公司 | Energy-saving ultrafiltration system control method and ultrafiltration system |
| CN113885592A (en) * | 2021-09-01 | 2022-01-04 | 武汉市政工程设计研究院有限责任公司 | Deep-wastewater intelligent operation and maintenance method, system, device and storage medium |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111362397A (en) * | 2020-03-24 | 2020-07-03 | 苏州市排水有限公司 | Automatic control method combining constant water level and constant water volume of sewage plant |
| CN112028141A (en) * | 2020-08-14 | 2020-12-04 | 河南中烟工业有限责任公司 | Control method of waste hot water collecting equipment |
| CN112594177A (en) * | 2020-12-09 | 2021-04-02 | 福建福清核电有限公司 | Nuclear island drainage pump stability control method |
| CN113041843A (en) * | 2021-05-31 | 2021-06-29 | 金科环境股份有限公司 | Energy-saving ultrafiltration system control method and ultrafiltration system |
| CN113885592A (en) * | 2021-09-01 | 2022-01-04 | 武汉市政工程设计研究院有限责任公司 | Deep-wastewater intelligent operation and maintenance method, system, device and storage medium |
| CN113885592B (en) * | 2021-09-01 | 2024-01-16 | 武汉市政工程设计研究院有限责任公司 | Intelligent operation and maintenance method, system and device for sewage deep tunneling and storage medium |
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