CN109264840A - A kind of horizontal sedimentation tank control system for adding drugs - Google Patents
A kind of horizontal sedimentation tank control system for adding drugs Download PDFInfo
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- CN109264840A CN109264840A CN201811375703.7A CN201811375703A CN109264840A CN 109264840 A CN109264840 A CN 109264840A CN 201811375703 A CN201811375703 A CN 201811375703A CN 109264840 A CN109264840 A CN 109264840A
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- pac
- pam
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of horizontal sedimentation tank control system for adding drugs, relate generally to technical field of sewage, system is using PLC controller as core, input unit has sedimentation basin feed water flow meter, PAC flowmeter, PAM flowmeter, milk of lime flowmeter, output device has PAC metering pump, PAM metering pump, lime milk metering pump, wherein PAC metering pump, PAM metering pump, lime milk metering pump is the metering pump of transducer drive, the output quantity of the pump housing can be adjusted by changing the running frequency of driving motor, sedimentation basin carrys out the water flow result input PLC that water ga(u)ge will test, PLC calculates PAC on this basis, PAM, the demand of milk of lime simultaneously passes through adjusting PAC metering pump, the running frequency of PAM metering pump and lime milk metering pump makes the dosage and sewage that help solidifying medicament Carry out water Auto-matching, realize the automatic adjustment of sedimentation basin dosage, has direct effect for improving sedimentation basin dosing precision and dosing quality.
Description
Technical field
The invention mainly relates to technical field of sewage, specifically a kind of horizontal sedimentation tank control system for adding drugs.
Background technique
In sewage treatment, by primary precipitation, sand, stirring are taken out, biological respinse precipitates again, and the processes such as filtering enter
Reuse water system, the sludge in remaining water enter sludge concentration tank, further increase the concentration of sludge, then passing through sludge pump will
Aqueous sludge is transported to sludge-tank, further precipitates, then the sludge of sludge-tank is retracted to sludge deslimer by sludge pump will
Sludge dewatering, in favor of it is subsequent transport and be further processed, and treated sewage can be realized as qualified discharge or
Recycling；In sewage disposal process, in order to accelerate these contamination precipitations and removal harmful substance, need in sedimentation basin
Medicament appropriate is added.
Horizontal sedimentation tank is mostly used concrete and builds, because of its simple structure, the features such as sedimentation effect is good, stable working performance quilt
It is widely used.Processing at dosing is carried out during the process operation of horizontal sedimentation tank can increase sedimentation effect, improve work
Efficiency.Agent-feeding treatment requires to help solidifying medicament to sedimentation basin front end addition milk of lime, PAC and PAM etc., and dosage is come by sedimentation basin
The variation of water water is affected, and how effectively to adjust dosage and realizes that accurate dosing is an important topic.
Summary of the invention
In view of the deficiencies in the prior art and defect, the present invention provides a kind of horizontal sedimentation tank Adding medicine control systems
System reduces material consumption, raising sedimentation basin working efficiency and work quality to solve the accurate dosing to sedimentation basin to reach
Problem.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme: a kind of horizontal sedimentation tank Adding medicine control system
System, including sedimentation basin, feed water flow meter FT0, PAC flowmeter FT1, PAM flowmeter FT2, milk of lime flowmeter FT3, PAC metering
Pump PU1, PAM metering pump PU2, lime milk metering pump PU3, PLC controller, the water flow knot that feed water flow meter FT0 will test
Fruit inputs PLC controller, and PLC controller is according to calculating PAC, PAM, milk of lime with the testing result of feed water flow meter FT0
Demand simultaneously makes the dosage for helping solidifying medicament and sewage water by adjusting PAC metering pump, PAM metering pump and lime milk metering pump
Auto-matching is measured, the PLC controller is made of three regulating loops, is PAC flow control circuit, the adjusting of PAM flow respectively
Circuit and milk of lime flow control circuit,
PAC regulating loop --- by feed water flow meter FT0, PAC demand computing module, PID adjustment module 1, frequency conversion meter
Amount pump PU1, PAC flowmeter FT1 is constituted,
PAM regulating loop --- by feed water flow meter FT0, PAM demand computing module, PID adjustment module 2, frequency conversion meter
Amount pump PU2, PAM flowmeter FT2 is constituted,
Milk of lime regulating loop --- by feed water flow meter FT0, milk of lime demand computing module, PID adjustment module 3,
Frequency conversion metering pump PU3, milk of lime flowmeter FT3 are constituted.
As a further improvement of the present invention, the PAC regulating loop working principle is,
(1) FT0 is arranged at sedimentation basin water inlet pipe, and detection sedimentation basin carrys out water flow and obtains flow value ft0, and outputs it
To the PAC demand computing module being located in PLC.
(2) PAC demand magnitude sp1 is obtained by calculation in PAC demand computing module, and calculation formula is as follows:
Sp1:PAC demand calculated value, unit m3/h；
C1:PAC adding consistency, unit ppm, parameter peripheral；
Ft0: sedimentation basin flow of inlet water, unit m3/h；
The mass concentration of making up a prescription of P1%:PAC, unit %, parameter peripheral；
ρ 1:PAC medical fluid density, g/cm3, parameter peripheral.
(3) opposite number of PAC demand magnitude sp1 and PAC actual flow value ft1 carry out operation by addition connector SU1,
It obtains flow deviation value er1 and passes it to PID computing module 1, calculation formula are as follows:
Er1=sp1-ft1
Er1:PAC flow deviation, unit m3/h；
Sp1:PAC demand calculated value, unit m3/h；
Ft1:PAC measured discharge value.
(4) PID computing module 1 to input quantity er1 carry out PID arithmetic, obtain frequency conversion metering pump setpoint frequency vf1 and by its
It exports to frequency conversion dosing pump PU1.PID computing module 1 is Position Form PID computing module, is realized by PLC, input quantity er1,
Output quantity is vf1.
(5) the setpoint frequency vf1 operating that frequency conversion metering pump PU1 is exported by PID computing module 1, the PAC for executing sedimentation basin add
Medicine task.
(6) PAC flowmeter FT1 detects dosing flow and obtains PAC actual flow value ft1 and its opposite number is fed back to addition
Connector SU1.FT1 is arranged at PAC dosing pump outlet conduit.
As a further improvement of the present invention, the PAM flow control circuit working principle is,
(1) flowmeter FT0 is shared a set of with sedimentation basin feed water flow meter in above-mentioned PAC regulating loop, detects sedimentation basin
Water flow obtains flow value ft0, and outputs this to the PAM demand computing module in PLC.
(2) PAM demand magnitude sp2 is obtained by calculation in PAM demand computing module, and calculation formula is as follows:
Sp2:PAM demand calculated value, unit m3/h；
C2:PAM adding consistency, unit ppm, parameter peripheral；
Ft0: sedimentation basin flow of inlet water, unit m3/h；
The mass concentration of making up a prescription of P2%:PAM, unit %, parameter peripheral；
ρ 2:PAM medical fluid density, g/cm3, parameter peripheral.
(3) opposite number of PAM demand magnitude sp2 and PAM actual flow value ft2 carry out operation by addition connector SU2,
It obtains flow deviation value er2 and passes it to PID computing module 2, calculation formula are as follows:
Er2=sp2-ft2
Er2:PAM flow deviation, unit m3/h；
Sp2:PAM demand calculated value, unit m3/h；
Ft2:PAM measured discharge value.
(4) PID computing module 2 to input quantity er2 carry out PID arithmetic, obtain frequency conversion metering pump setpoint frequency vf2 and by its
It exports to frequency conversion dosing pump PU2.PID computing module 2 is Position Form PID computing module, is realized by PLC, input quantity er2,
Output quantity is vf2.
(5) the setpoint frequency vf2 operating that frequency conversion metering pump PU2 is exported by PID computing module 2, the PAM for executing sedimentation basin add
Medicine task.
(6) PAM flowmeter FT2 detects dosing flow and obtains PAM actual flow value ft2 and its opposite number is fed back to addition
Connector SU2.FT2 is arranged at PAM dosing pump outlet conduit.
As a further improvement of the present invention, the milk of lime regulating loop working principle is,
(1) flowmeter FT0 is shared a set of with sedimentation basin feed water flow meter in above-mentioned PAC regulating loop, detects sedimentation basin
Water flow obtains flow value ft0, and outputs this to the milk of lime demand computing module in PLC.
(2) milk of lime demand magnitude sp3 is obtained by calculation in milk of lime demand computing module, and calculation formula is as follows:
Sp3:PAM demand calculated value, unit m3/h；
C3: lime milk dosing concentration, unit ppm, parameter peripheral；
Ft0: sedimentation basin flow of inlet water, unit m3/h；
P3%: the mass concentration of making up a prescription of milk of lime, unit %, parameter peripheral；
ρ 3: milk of lime medical fluid density, g/cm3, parameter peripheral.
(3) opposite number of milk of lime demand magnitude sp3 and milk of lime actual flow value ft3 by addition connector SU3 into
Row operation obtains flow deviation value er3 and passes it to PID computing module 3, calculation formula are as follows:
Er3=sp3-ft3
Er3: milk of lime flow deviation, unit m3/h；
Sp3: milk of lime demand calculated value, unit m3/h；
Ft3: milk of lime measured discharge value.
(4) PID computing module 3 to input quantity er3 carry out PID arithmetic, obtain frequency conversion metering pump setpoint frequency vf3 and by its
It exports to frequency conversion dosing pump PU3.PID computing module 3 is Position Form PID computing module, is realized by PLC, input quantity er3,
Output quantity is vf3.
(5) the setpoint frequency vf3 operating that frequency conversion metering pump PU3 is exported by PID computing module 3, executes the lime of sedimentation basin
Newborn dosing task.
(6) milk of lime flowmeter FT3 detects dosing flow and obtains milk of lime actual flow value ft3 and feed back its opposite number
To addition connector SU3.FT3 is arranged at lime milk dosing pump discharge pipeline.
As a further improvement of the present invention, PAC metering pump PU1, PAM metering pump PU2, lime milk metering pump PU3
For the metering pump of transducer drive, the output quantity of the pump housing can be adjusted by changing the running frequency of driving motor.
Compared with prior art, the device have the advantages that are as follows: the control system can according to the present invention it is distinctive
Control method realizes the accurate dosing to sedimentation basin to reach and reduce material consumption, raising sedimentation basin working efficiency and work quality.
Detailed description of the invention
The present invention is further illustrated with reference to the accompanying drawings and detailed description:
Fig. 1 is a kind of structure flow chart of horizontal sedimentation tank control system for adding drugs of the present invention；
Fig. 2 is a kind of conciliation loop diagram of horizontal sedimentation tank control system for adding drugs of the present invention.
Specific embodiment
It is right in the following with reference to the drawings and specific embodiments in order to which technical solution of the present invention and beneficial effect are more clearly understood
The present invention is described in further detail, it should be understood that and the specific embodiments described herein are only used for understanding the present invention,
Be not intended to limit the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
The present invention be using programmable logic controller (PLC) PLC as the automatic control system of core, it is all input, output and
Process control signal is transmitted by continuous mode in real time.As shown in Fig. 2, system control method is by three regulating loops
Composition, is PAC flow control circuit, PAM flow control circuit and milk of lime flow control circuit respectively.
One, PAC regulating loop.By sedimentation basin feed water flow meter FT0, PAC demand computing module, PID adjustment module 1,
Frequency conversion metering pump PU1, PAC flowmeter FT1 is constituted.
1, FT0 is arranged at sedimentation basin water inlet pipe, and detection sedimentation basin carrys out water flow and obtains flow value ft0, and outputs it
To the PAC demand computing module being located in PLC.
2, PAC demand magnitude sp1 is obtained by calculation in PAC demand computing module, and calculation formula is as follows:
Sp1:PAC demand calculated value, unit m3/h；
C1:PAC adding consistency, unit ppm, parameter peripheral；
Ft0: sedimentation basin flow of inlet water, unit m3/h；
The mass concentration of making up a prescription of P1%:PAC, unit %, parameter peripheral；
ρ 1:PAC medical fluid density, g/cm3, parameter peripheral.
3, the opposite number of PAC demand magnitude sp1 and PAC actual flow value ft1 carry out operation by addition connector SU1,
It obtains flow deviation value er1 and passes it to PID computing module 1, calculation formula are as follows:
Er1=sp1-ft1
Er1:PAC flow deviation, unit m3/h；
Sp1:PAC demand calculated value, unit m3/h；
Ft1:PAC measured discharge value.
4, PID computing module 1 to input quantity er1 carry out PID arithmetic, obtain frequency conversion metering pump setpoint frequency vf1 and by its
It exports to frequency conversion dosing pump PU1.PID computing module 1 is Position Form PID computing module, is realized by PLC, input quantity er1,
Output quantity is vf1.
5, the setpoint frequency vf1 operating that frequency conversion metering pump PU1 is exported by PID computing module 1, the PAC for executing sedimentation basin add
Medicine task.
6, PAC flowmeter FT1 detects dosing flow and obtains PAC actual flow value ft1 and its opposite number is fed back to addition
Connector SU1.FT1 is arranged at PAC dosing pump outlet conduit.
Two, PAM regulating loop.By sedimentation basin feed water flow meter FT0, PAM demand computing module, PID adjustment module 2,
Frequency conversion metering pump PU2, PAM flowmeter FT2 is constituted.
1, flowmeter FT0 is shared a set of with sedimentation basin feed water flow meter in above-mentioned PAC regulating loop, detects sedimentation basin water
Flow obtains flow value ft0, and outputs this to the PAM demand computing module in PLC.
2, PAM demand magnitude sp2 is obtained by calculation in PAM demand computing module, and calculation formula is as follows:
Sp2:PAM demand calculated value, unit m3/h；
C2:PAM adding consistency, unit ppm, parameter peripheral；
Ft0: sedimentation basin flow of inlet water, unit m3/h；
The mass concentration of making up a prescription of P2%:PAM, unit %, parameter peripheral；
ρ 2:PAM medical fluid density, g/cm3, parameter peripheral.
3, the opposite number of PAM demand magnitude sp2 and PAM actual flow value ft2 carry out operation by addition connector SU2,
It obtains flow deviation value er2 and passes it to PID computing module 2, calculation formula are as follows:
Er2=sp2-ft2
Er2:PAM flow deviation, unit m3/h；
Sp2:PAM demand calculated value, unit m3/h；
Ft2:PAM measured discharge value.
4, PID computing module 2 to input quantity er2 carry out PID arithmetic, obtain frequency conversion metering pump setpoint frequency vf2 and by its
It exports to frequency conversion dosing pump PU2.PID computing module 2 is Position Form PID computing module, is realized by PLC, input quantity er2,
Output quantity is vf2.
5, the setpoint frequency vf2 operating that frequency conversion metering pump PU2 is exported by PID computing module 2, the PAM for executing sedimentation basin add
Medicine task.
6, PAM flowmeter FT2 detects dosing flow and obtains PAM actual flow value ft2 and its opposite number is fed back to addition
Connector SU2.FT2 is arranged at PAM dosing pump outlet conduit.
Three, milk of lime regulating loop.It is adjusted by sedimentation basin feed water flow meter FT0, milk of lime demand computing module, PID
Module 3, frequency conversion metering pump PU3, milk of lime flowmeter FT3 are constituted.
1, flowmeter FT0 is shared a set of with sedimentation basin feed water flow meter in above-mentioned PAC regulating loop, detects sedimentation basin water
Flow obtains flow value ft0, and outputs this to the milk of lime demand computing module in PLC.
2, milk of lime demand magnitude sp3 is obtained by calculation in milk of lime demand computing module, and calculation formula is as follows:
Sp3:PAM demand calculated value, unit m3/h；
C3: lime milk dosing concentration, unit ppm, parameter peripheral；
Ft0: sedimentation basin flow of inlet water, unit m3/h；
P3%: the mass concentration of making up a prescription of milk of lime, unit %, parameter peripheral；
ρ 3: milk of lime medical fluid density, g/cm3, parameter peripheral.
3, the opposite number of milk of lime demand magnitude sp3 and milk of lime actual flow value ft3 are carried out by addition connector SU3
Operation obtains flow deviation value er3 and passes it to PID computing module 3, calculation formula are as follows:
Er3=sp3-ft3
Er3: milk of lime flow deviation, unit m3/h；
Sp3: milk of lime demand calculated value, unit m3/h；
Ft3: milk of lime measured discharge value.
4, PID computing module 3 to input quantity er3 carry out PID arithmetic, obtain frequency conversion metering pump setpoint frequency vf3 and by its
It exports to frequency conversion dosing pump PU3.PID computing module 3 is Position Form PID computing module, is realized by PLC, input quantity er3,
Output quantity is vf3.
5, the setpoint frequency vf3 operating that frequency conversion metering pump PU3 is exported by PID computing module 3, executes the milk of lime of sedimentation basin
Dosing task.
6, milk of lime flowmeter FT3 detects dosing flow and obtains milk of lime actual flow value ft3 and feed back its opposite number
To addition connector SU3.FT3 is arranged at lime milk dosing pump discharge pipeline.
Claims (5)
1. a kind of horizontal sedimentation tank control system for adding drugs, including sedimentation basin, feed water flow meter FT0, PAC flowmeter FT1, PAM stream
Meter FT2, milk of lime flowmeter FT3, PAC metering pump PU1, PAM metering pump PU2, lime milk metering pump PU3, PLC controller,
It is characterized by: the water flow result input PLC controller that feed water flow meter FT0 will test, PLC controller is with flow of inlet water
The testing result for counting FT0 is according to the demand for calculating PAC, PAM, milk of lime and by adjusting PAC metering pump, PAM metering pump
Make that the dosage of solidifying medicament and sewage is helped to carry out water Auto-matching with lime milk metering pump, the PLC controller is adjusted by three
Circuit composition, is PAC flow control circuit, PAM flow control circuit and milk of lime flow control circuit respectively,
PAC regulating loop --- by feed water flow meter FT0, PAC demand computing module, PID adjustment module 1, frequency conversion metering pump
PU1, PAC flowmeter FT1 are constituted,
PAM regulating loop --- by feed water flow meter FT0, PAM demand computing module, PID adjustment module 2, frequency conversion metering pump
PU2, PAM flowmeter FT2 are constituted,
Milk of lime regulating loop --- by feed water flow meter FT0, milk of lime demand computing module, PID adjustment module 3, frequency conversion
Metering pump PU3, milk of lime flowmeter FT3 are constituted.
2. a kind of horizontal sedimentation tank control system for adding drugs according to claim 1, it is characterised in that: the PAC is adjusted
Loop works principle is,
(1) FT0 is arranged at sedimentation basin water inlet pipe, and detection sedimentation basin carrys out water flow and obtains flow value ft0, and outputs this to position
PAC demand computing module in PLC.
(2) PAC demand magnitude sp1 is obtained by calculation in PAC demand computing module, and calculation formula is as follows:
Sp1:PAC demand calculated value, unit m3/h；
C1:PAC adding consistency, unit ppm, parameter peripheral；
Ft0: sedimentation basin flow of inlet water, unit m3/h；
The mass concentration of making up a prescription of P1%:PAC, unit %, parameter peripheral；
ρ 1:PAC medical fluid density, g/cm3, parameter peripheral.
(3) opposite number of PAC demand magnitude sp1 and PAC actual flow value ft1 carry out operation by addition connector SU1, obtain
Flow deviation value er1 simultaneously passes it to PID computing module 1, calculation formula are as follows:
Er1=sp1-ft1
Er1:PAC flow deviation, unit m3/h；
Sp1:PAC demand calculated value, unit m3/h；
Ft1:PAC measured discharge value.
(4) PID computing module 1 carries out PID arithmetic to input quantity er1, obtains frequency conversion metering pump setpoint frequency vf1 and outputs it
To frequency conversion dosing pump PU1.PID computing module 1 is Position Form PID computing module, is realized by PLC, input quantity er1, is exported
Amount is vf1.
(5) the setpoint frequency vf1 operating that frequency conversion metering pump PU1 is exported by PID computing module 1, the PAC dosing for executing sedimentation basin are appointed
Business.
(6) PAC flowmeter FT1 detects dosing flow and obtains PAC actual flow value ft1 and its opposite number is fed back to addition connection
Device SU1.FT1 is arranged at PAC dosing pump outlet conduit.
3. a kind of horizontal sedimentation tank control system for adding drugs according to claim 1, it is characterised in that: the PAM flow
Regulating loop working principle is,
(1) flowmeter FT0 is shared a set of with sedimentation basin feed water flow meter in above-mentioned PAC regulating loop, and detection sedimentation basin carrys out water flow
Flow value ft0 is measured, and outputs this to the PAM demand computing module in PLC.
(2) PAM demand magnitude sp2 is obtained by calculation in PAM demand computing module, and calculation formula is as follows:
Sp2:PAM demand calculated value, unit m3/h；
C2:PAM adding consistency, unit ppm, parameter peripheral；
Ft0: sedimentation basin flow of inlet water, unit m3/h；
The mass concentration of making up a prescription of P2%:PAM, unit %, parameter peripheral；
ρ 2:PAM medical fluid density, g/cm3, parameter peripheral.
(3) opposite number of PAM demand magnitude sp2 and PAM actual flow value ft2 carry out operation by addition connector SU2, obtain
Flow deviation value er2 simultaneously passes it to PID computing module 2, calculation formula are as follows:
Dr2=sp2-ft2
Er2:PAM flow deviation, unit m3/h；
Sp2:PAM demand calculated value, unit m3/h；
Ft2:PAM measured discharge value.
(4) PID computing module 2 carries out PID arithmetic to input quantity er2, obtains frequency conversion metering pump setpoint frequency vf2 and outputs it
To frequency conversion dosing pump PU2.PID computing module 2 is Position Form PID computing module, is realized by PLC, input quantity er2, is exported
Amount is vf2.
(5) the setpoint frequency vf2 operating that frequency conversion metering pump PU2 is exported by PID computing module 2, the PAM dosing for executing sedimentation basin are appointed
Business.
(6) PAM flowmeter FT2 detects dosing flow and obtains PAM actual flow value ft2 and its opposite number is fed back to addition connection
Device SU2.FT2 is arranged at PAM dosing pump outlet conduit.
4. a kind of horizontal sedimentation tank control system for adding drugs according to claim 1, it is characterised in that: the milk of lime tune
Saving loop works principle is,
(1) flowmeter FT0 is shared a set of with sedimentation basin feed water flow meter in above-mentioned PAC regulating loop, and detection sedimentation basin carrys out water flow
Flow value ft0 is measured, and outputs this to the milk of lime demand computing module in PLC.
(2) milk of lime demand magnitude sp3 is obtained by calculation in milk of lime demand computing module, and calculation formula is as follows:
Sp3:PAM demand calculated value, unit m3/h；
C3: lime milk dosing concentration, unit ppm, parameter peripheral；
Ft0: sedimentation basin flow of inlet water, unit m3/h；
P3%: the mass concentration of making up a prescription of milk of lime, unit %, parameter peripheral；
ρ 3: milk of lime medical fluid density, g/cm3, parameter peripheral.
(3) opposite number of milk of lime demand magnitude sp3 and milk of lime actual flow value ft3 are transported by addition connector SU3
It calculates, obtains flow deviation value er3 and pass it to PID computing module 3, calculation formula are as follows:
Er3=sp3-ft3
Er3: milk of lime flow deviation, unit m3/h；
Sp3: milk of lime demand calculated value, unit m3/h；
Ft3: milk of lime measured discharge value.
(4) PID computing module 3 carries out PID arithmetic to input quantity er3, obtains frequency conversion metering pump setpoint frequency vf3 and outputs it
To frequency conversion dosing pump PU3.PID computing module 3 is Position Form PID computing module, is realized by PLC, input quantity er3, is exported
Amount is vf3.
(5) the setpoint frequency vf3 operating that frequency conversion metering pump PU3 is exported by PID computing module 3, the milk of lime for executing sedimentation basin add
Medicine task.
(6) milk of lime flowmeter FT3 detects dosing flow and obtains milk of lime actual flow value ft3 and feed back to its opposite number to add
Method connector SU3.FT3 is arranged at lime milk dosing pump discharge pipeline.
5. a kind of horizontal sedimentation tank control system for adding drugs according to claim 1, it is characterised in that: the PAC metering
The metering pump that PU1, PAM metering pump PU2, lime milk metering pump PU3 are transducer drive is pumped, it can be by changing driving motor
The output quantity of the running frequency adjusting pump housing.
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| CN201811375703.7A CN109264840A (en) | 2018-11-19 | 2018-11-19 | A kind of horizontal sedimentation tank control system for adding drugs |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112827661A (en) * | 2020-12-29 | 2021-05-25 | 内蒙古黄陶勒盖煤炭有限责任公司 | Intelligent medicine dispensing system |
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Application publication date: 20190125 |