CN108547760A - Frequency follow-up control method for lift pump of water treatment - Google Patents
Frequency follow-up control method for lift pump of water treatment Download PDFInfo
- Publication number
- CN108547760A CN108547760A CN201810351894.7A CN201810351894A CN108547760A CN 108547760 A CN108547760 A CN 108547760A CN 201810351894 A CN201810351894 A CN 201810351894A CN 108547760 A CN108547760 A CN 108547760A
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- Prior art keywords
- frequency
- liquid level
- pump
- control
- frequency converter
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Links
- 238000000034 method Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 71
- 239000012530 fluid Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000001131 transforming effect Effects 0.000 abstract 1
- 230000001603 reducing effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011176 pooling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
-
- 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
- F04B51/00—Testing machines, pumps, or pumping installations
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a frequency follow-up control method for a lift pump for water treatment, which can adjust the flow by using the frequency adjusting function of a frequency converter, automatically control the change of the liquid level of a water collecting well caused by the change of the flow of a water inlet pipe network and continuously, timely and reliably realize the flow control function of the lift pump. The method of the invention requires few monitoring and execution devices, but is extremely easy to implement for automatic control. The operation process can be completely separated from the intervention operation of personnel, and the operation and maintenance cost is reduced. The system is suitable for newly designed systems in the construction period and is also suitable for transforming the original systems.
Description
Technical field
The present invention relates to the promotion pump frequency follow-up control methods of water treatment field more particularly to a kind of water process.
Background technology
The control mode of traditional water process elevator pump is generally divided into the control of variable-frequency governor and without variable-frequency governor
Two kinds of control.
The control mode of no variable-frequency governor substantially controls start and stop and the quantity of pump by liquid level.For example liquid level reaches
A certain height starts to start First pump, if liquid level continues to increase, starts second, until N platforms pump.With liquid level
Decline, reduce the quantity for starting pump, stops all pumps when less than protection liquid level.Under this control mode, the quantity of pump is
Interval variation, either increase a pump or reduces by a pump.So flow will change correspondingly, or increase certain one stream
Amount, or a certain flow is reduced, rear side control system can be caused to receive impact in this way, influence the stable operation of system.
Have under the control mode of frequency control, a certain pump or all pumps are all frequency controls.It thus can be with
The flow of pump is continuously adjusted by frequency control, in order to avoid subsequent system is caused to impact.There is the elevator pump control of frequency control
Mode processed is divided into single Frequency Converter Control mode and whole Frequency Converter Control modes.
Single Frequency Converter Control mode is that the size of a part of flow is adjusted using a frequency converter, when the flow of frequency converter
After metered flow of the adjusting range more than this pump, this pump is switched to power frequency mode, other one is adjusted with frequency converter
The flow of pump.This mode control it is cumbersome, it is complex circuit, of high cost.Power grid and pump are rushed in frequent switching power frequency and frequency conversion
It hits also very big.
The control mode of whole frequency converters is all pumps frequency converter, is adjusted by frequency converter to control the rotating speed of pump
Rectification flow.It needs that single pump running frequency is manually set separately under this control mode, then needs to change according to system
Run pump quantity number, that is, according to the height of liquid level increase and decrease operation pump quantity.Under this control mode
There is Railway Project：
1. each pump needs to preset a frequency, and this frequency needs rule of thumb to change with actual conditions, this ratio
More difficult grasp, needs long-felt.And it is even more to be difficult to follow variation in time when water changes.
2. the impact of flow still can be caused during changing the quantity of pump, impacted to subsequent system.
Either there are the control of frequency control and the control without frequency control, traditional control mode increasing and decreasing pump
When will prejudge want it is increased pump it is whether faulty, also want the pump of the switchover operation of timing so that the mill each pumped
It damages relatively uniform.This just inevitably causes the complexity of system and the raising of cost.
In conclusion the control mode of intrinsic elevator pump is all to have various problems to need to solve.
Invention content
The purpose of the present invention：A kind of promotion pump frequency follow-up control method of water process is provided, can rely on and automatically control,
In the case of not needing complicated measuring instrumentss and execution system, ensure to meet the requirement to water process pump control so that water pump
Operation and control system become extremely simple and controllable.The needs of various operating modes can neatly be met simultaneously and given full play to existing
Water position manages the ability of facility, improves the shock resistance of system.
To achieve the goals above, the technical scheme is that：
A kind of promotion pump frequency follow-up control method of water process, includes the following steps
Step 1：The elevator pump of all water process is all by frequency converter frequency control, and the interior installation of sump of elevator pump is continuous
Measure the liquid level gauge of height of liquid level；
Step 2：The measured value of liquid level gauge, which is exported, either to be exported to frequency converter to PLC, control instrument or industrial personal computer；
Step 3：It is set in the minimum output frequency of corresponding frequency converter when the lower value of collecting well fluid level, is set in well liquid of catchmenting
The maximum output frequency of corresponding frequency converter when the high value of position, the frequency of elevator pump frequency converter and the measured value of liquid level gauge press line
Property variation；The high value of the collecting well fluid level is known as completely frequency liquid level, and the full frequency liquid level is most higher than true sump
High liquid level, or the highest liquid level less than true sump；
Step 4：The frequency setting value of frequency converter is controlled by the size of liquid level gauge output valve；
Step 5：It is intake by adjusting the quantity of the elevator pump of startup and the height setting value of corresponding full frequency liquid level to change
Flow；
Step 6：Elevator pump protection liquid level hereinafter, all elevator pumps are automatically stopped operation；In the protection liquid level of elevator pump
More than, it automatically begins to run to the elevator pump for starting order.
The promotion pump frequency follow-up control method of above-mentioned water process, wherein in the step 1, described is all
Elevator pump share a Frequency Converter Control or every pump use individual Frequency Converter Control.
The promotion pump frequency follow-up control method of above-mentioned water process, wherein in the step 1, the liquid level
It is calculated as ultrasonic type, static pressure type, laser type, sliding or rotating mechanism formula liquid level gauge.
The promotion pump frequency follow-up control method of above-mentioned water process, wherein in the step 6, intake meeting
In the case of flow, extra either spare or faulty elevator pump does not start.
The present invention can utilize the Frequency Adjustment Function of frequency converter to adjust flow, and be caused according to the variation of water inlet pipe network flow
The variation of collecting well fluid level automatically control, can continuous, the timely and reliable flow control function for realizing elevator pump.This hair
The monitoring and execute the seldom of equipment that bright method needs, but very easily realize and automatically control.It can be complete in operational process
Disengaging personnel's intervention operation reduces operation and maintenance cost.It is suitble to the newly-designed system of construction period, also is adapted for original system
It is transformed.
Specific implementation mode
A kind of promotion pump frequency follow-up control method of water process, includes the following steps：
Step 1：The elevator pump of all water process is all by frequency converter frequency control, and the interior installation of sump of elevator pump can
The continuous liquid level gauge for measuring height of liquid level.
Step 2：The measured value of liquid level gauge, which is exported, either to be exported to frequency converter to controls such as PLC, control instrument or industrial personal computers
System processed.
Step 3：It is set in the minimum output frequency of corresponding frequency converter when the lower value of collecting well fluid level, is set in and catchments
The maximum output frequency of corresponding frequency converter, the frequency of elevator pump frequency converter and the measured value of liquid level gauge when the high value of well liquid position
By linear change；The high value of this collecting well fluid level is referred to as full frequency liquid level.Full frequency liquid level can be higher than true collection
The highest liquid level of well can also be less than the highest liquid level of true sump.Full frequency liquid level number be intended merely to adjustment length
The needs of phase flow of inlet water and set.This value is bigger, and flow of inlet water is fewer.
Step 4：The frequency setting value that frequency converter is controlled by the size of liquid level gauge output valve, to change separate unit or institute
The running frequency of some elevator pumps.
Step 5：By adjusting the elevator pump of startup quantity number and the height setting value of corresponding full frequency liquid level change
Become flow of inlet water.
Step 6：Elevator pump protection liquid level hereinafter, all elevator pumps are automatically stopped operation；In the protection of elevator pump
It more than liquid level, automatically begins to run to the elevator pump for starting order.
In the step 1, all elevator pumps can share a Frequency Converter Control, can also every pump
Use individual Frequency Converter Control.
In the step 1, the liquid level gauge can use ultrasonic type, static pressure type, laser type, sliding or rotation
The liquid level gauge of the modes such as mechanism.
In the step 6, in the case where meeting flow of inlet water, extra or spare elevator pump can not open
Dynamic, faulty elevator pump does not start.
Embodiment：
Sewage disposal system promotes pumping system, has 3 7.5kw elevator pumps, the minimum liquid level of elevator pump protection is 1.0 meters.Every
There is frequency converter, individually can start and stop.Three elevator pumps share the ultrasonic level gage of a sump.Liquid level gauge
Measure output is 4-20 milliamperes of signals, and signal is sent to after PLC by becoming 0-10 meters of liquid level gauge signal.PLC passes through
The setpoint frequency of 4-20 milliamperes of signal control frequency converters of output analog quantity after program calculates.PLC and host computer are connected with configuration software
It connects, various parameters is set by the man-machine interface of host computer.
Step 1：The corresponding liquid level of every elevator pump low-limit frequency is set as 0.0 meter, sets every frequency converter highest frequency
50 hertz of corresponding full 8.0 meters of frequency liquid levels.When sump actual liquid level is 6 meters, the operation setpoint frequency of elevator pump is
37.5 hertz.
Step 2：1.0 meters of termination of pumping liquid level is set, one elevator pump of startup is needed according to flow of inlet water.
Step 3：When sump actual liquid level is 7 meters, the operation setpoint frequency of elevator pump is 43.75 hertz.
Step 4：Observation a period of time can be by every 50 hertz of frequency converter highest frequency if feeling that flow of inlet water is bigger than normal
Hereby corresponding liquid level is changed to 9.0 meters.When sump actual liquid level is 7 meters, the operation setpoint frequency of elevator pump is 38.8 hertz
Hereby.
Step 5：When liquid level is less than 0.9 meter, elevator pump is automatically stopped.When liquid level is higher than 1.0 meters, elevator pump is certainly
It is dynamic to start.
Step 6：Elevator pump longtime running will be automatically found the equalization point of a frequency and liquid level, reach basicly stable
Water inlet.
Pump variable frequency device is utilized since the present invention is rational continuously adjusts function, is carried out further through the liquid level of sump
Continuous control and adjusting, so the water impact useless of conveying, is consecutive variations.Since control variable is fairly simple, control
The various monitorings of system processed are fewer with executive component, and operation and control will greatly simplify.
Simultaneously as the variable quantity of system is the liquid level of sump, the flow positive correlation of this liquid level and water inlet pipe network, when
When pipe network flow of intaking is big, the liquid level of sump is relatively high, and the frequency of elevator pump is bigger, and flow also increases accordingly.
Conversely, then reducing.This process is realized automatically, is a kind of servo-actuated process, but can according to the level value of full frequency liquid level into
Row adjustment.The system can be timely automatedly according to the frequency or flow of the variation adjustment elevator pump of the flow of water inlet pipe network.
Meanwhile the present invention can utilize the pooling feature of long pipe network volume, the appropriate design capacity for reducing regulating reservoir
Or cancel sedimentation basin, it reducings the construction costs.
The water process elevator pump of the method for the present invention can meet the needs of various water treatment fields, and control simple, steady
It is fixed, reliable, economy, shock resistance, applied widely.
In conclusion the present invention can utilize the Frequency Adjustment Function of frequency converter to adjust flow, and according to water inlet pipe network flow
Variation caused by the variation of collecting well fluid level automatically control, can continuous, the timely and reliable flow control for realizing elevator pump
Function processed.The monitoring and execute the seldom of equipment that the method for the present invention needs, but very easily realize and automatically control.Operational process
In can completely disengage personnel's intervention operation, reduce operation and maintenance cost.It is suitble to the newly-designed system of construction period, also is adapted for
Original system is transformed.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every utilization
Equivalent structure transformation made by present specification, directly or indirectly with the technology neck for being attached to other Related products
Domain is included within the scope of the present invention.
Claims (4)
1. a kind of promotion pump frequency follow-up control method of water process, it is characterised in that：Include the following steps：
Step 1：The elevator pump of all water process is all by frequency converter frequency control, and the interior installation of sump of elevator pump is continuous
Measure the liquid level gauge of height of liquid level；
Step 2：The measured value of liquid level gauge, which is exported, either to be exported to frequency converter to PLC, control instrument or industrial personal computer；
Step 3：It is set in the minimum output frequency of corresponding frequency converter when the lower value of collecting well fluid level, is set in well liquid of catchmenting
The maximum output frequency of corresponding frequency converter when the high value of position, the frequency of elevator pump frequency converter and the measured value of liquid level gauge press line
Property variation；The high value of the collecting well fluid level is known as completely frequency liquid level, and the full frequency liquid level is most higher than true sump
High liquid level, or the highest liquid level less than true sump；
Step 4：The frequency setting value of frequency converter is controlled by the size of liquid level gauge output valve；
Step 5：It is intake by adjusting the quantity of the elevator pump of startup and the height setting value of corresponding full frequency liquid level to change
Flow；
Step 6：Elevator pump protection liquid level hereinafter, all elevator pumps are automatically stopped operation；In the protection liquid level of elevator pump
More than, it automatically begins to run to the elevator pump for starting order.
2. the promotion pump frequency follow-up control method of water process according to claim 1, it is characterised in that：In the step
In rapid 1, all elevator pumps share a Frequency Converter Control or every pump uses individual Frequency Converter Control.
3. the promotion pump frequency follow-up control method of water process according to claim 1, it is characterised in that：In the step
In rapid 1, the liquid level is calculated as ultrasonic type, static pressure type, laser type, sliding or rotating mechanism formula liquid level gauge.
4. the promotion pump frequency follow-up control method of water process according to claim 1, it is characterised in that：In the step
In rapid 6, in the case where meeting flow of inlet water, extra either spare or faulty elevator pump does not start.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810351894.7A CN108547760B (en) | 2018-04-19 | 2018-04-19 | Frequency follow-up control method for lift pump of water treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810351894.7A CN108547760B (en) | 2018-04-19 | 2018-04-19 | Frequency follow-up control method for lift pump of water treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108547760A true CN108547760A (en) | 2018-09-18 |
| CN108547760B CN108547760B (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810351894.7A Active CN108547760B (en) | 2018-04-19 | 2018-04-19 | Frequency follow-up control method for lift pump of water treatment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682300A (en) * | 2020-12-30 | 2021-04-20 | 上海远动科技有限公司 | Control method of variable-frequency lift pump based on liquid level regulation |
| CN114198293A (en) * | 2022-01-24 | 2022-03-18 | 高格立节能科技(海南)有限公司 | Variable frequency control method and controller of sewage lift pump |
| CN114810573A (en) * | 2022-04-29 | 2022-07-29 | 扬州大学 | Be used for water pump air-breathing rate survey device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09160654A (en) * | 1995-12-13 | 1997-06-20 | Nissin Electric Co Ltd | Method and device for water level control |
| CN101761490A (en) * | 2009-12-23 | 2010-06-30 | 北京吉源汇远科技有限公司 | Control method and system for inlet water lifting pumps of sewage plant |
| CN101922443A (en) * | 2009-06-15 | 2010-12-22 | 上海远动科技有限公司 | Control method of variable frequency lift pump based on liquid level adjustment |
| CN204941881U (en) * | 2015-08-07 | 2016-01-06 | 南京贝德环保设备制造有限公司 | A kind of constant pressure water supply automatical control system |
| CN107376456A (en) * | 2017-08-17 | 2017-11-24 | 桑德集团有限公司 | A kind of sewage disposal filtering cloth filtering pool autocontrol method |
-
2018
- 2018-04-19 CN CN201810351894.7A patent/CN108547760B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09160654A (en) * | 1995-12-13 | 1997-06-20 | Nissin Electric Co Ltd | Method and device for water level control |
| CN101922443A (en) * | 2009-06-15 | 2010-12-22 | 上海远动科技有限公司 | Control method of variable frequency lift pump based on liquid level adjustment |
| CN101761490A (en) * | 2009-12-23 | 2010-06-30 | 北京吉源汇远科技有限公司 | Control method and system for inlet water lifting pumps of sewage plant |
| CN204941881U (en) * | 2015-08-07 | 2016-01-06 | 南京贝德环保设备制造有限公司 | A kind of constant pressure water supply automatical control system |
| CN107376456A (en) * | 2017-08-17 | 2017-11-24 | 桑德集团有限公司 | A kind of sewage disposal filtering cloth filtering pool autocontrol method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682300A (en) * | 2020-12-30 | 2021-04-20 | 上海远动科技有限公司 | Control method of variable-frequency lift pump based on liquid level regulation |
| CN114198293A (en) * | 2022-01-24 | 2022-03-18 | 高格立节能科技(海南)有限公司 | Variable frequency control method and controller of sewage lift pump |
| CN114810573A (en) * | 2022-04-29 | 2022-07-29 | 扬州大学 | Be used for water pump air-breathing rate survey device |
| CN114810573B (en) * | 2022-04-29 | 2023-07-21 | 扬州大学 | Be used for water pump air suction rate survey device |
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| Publication number | Publication date |
|---|---|
| CN108547760B (en) | 2019-12-31 |
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