CN110510729A - Cleaning control method, system and corresponding moving bed biological filter tank reactor assembly - Google Patents
Cleaning control method, system and corresponding moving bed biological filter tank reactor assembly Download PDFInfo
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- CN110510729A CN110510729A CN201910746917.9A CN201910746917A CN110510729A CN 110510729 A CN110510729 A CN 110510729A CN 201910746917 A CN201910746917 A CN 201910746917A CN 110510729 A CN110510729 A CN 110510729A
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- control
- cleaning
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- weir plate
- filtrate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Abstract
The present invention relates to cleaning control method, system and corresponding moving bed biological filter tank reactor assemblies.The method is adapted to the cleaning control of moving bed biological filter tank reactor (MBFR), and the day obtained according to monitoring device adds up inflow, influent CODCr, water outlet CODCr, water inlet suspended matter and intake suspended matter and empirical parameter calculate single cleaning duration calculating and carry out cleaning control according to this, cleaning system executes and cleans interval of rest automatically into cleaning.The cleaning system is equipped with for realizing the control device of the above method and the monitoring device for monitoring required data and the executive device under control device control for supplying to reactor, and moving bed biological filter tank reactor cleaning system carries out the cleaning control of reactor using the above method.The present invention can be according to actual conditions dynamic regulation cleaning strength, so that the dynamic equilibrium of the microbial biomass in holding system, reduces cleaning water consumption, improve Treatment Stability.
Description
Technical field
The present invention relates to a kind of sewage disposal system and control methods, including being suitable for the clear of moving bed biological filter tank reactor
It washes control method, be suitable for the control system of moving bed biological filter tank reactor progress cleaning control using this method and using this
The moving bed biological filter tank reactor assembly of kind cleaning control method and control system.
Background technique
Moving bed biological filter tank reactor (MBFR) is the new bio developed on the basis of fixed bed biological aerated filter
Membrane reactor is consistent degradation principles of pollutant etc. and fixed bed biological aerated filter, mainly by filter tank, water distribution
System, aerating system, promotion cleaning system etc. form, and load load of the even-grained particulate filter as biomembrane in reactor
Dirty water pollutant is adsorbed using biomembrane accompanying on filtrate and decomposes removal by body.Moving bed biological filter tank reactor
Core technology is will to fix filter bed form to change into moving bed, in the reactor of moving bed biological filter tank, is promoted using air
Filtrate is promoted to top and is cleaned from reactor bottom by device, and the filtrate after cleaning returns to bed, shape by gravity
It is recycled at internal flow.Filtrate, due to the intervention of air and stirring release effect, completes filter material surface biology in lifting process
Film falls off and the removing of sundries, and separation is completed in the cleaning device of top.It is realized by above procedure continuous uninterrupted
While operation, so that filtrate is continuously carried out slow loopy moving in the reactor and cleaned.
For example, CN105016462A discloses a kind of biological aerated filter that filtrate automatically continuously cleans (referring to Fig. 6), packet
Pond body is included, one or more vertical filtrate circulators are set in the pond body, the filtrate circulator is mainly cleaned by filtrate
Device and cleaning water deflector are constituted, and the filtrate washer includes riser, and the upper/lower terminal of the riser is open,
Lower port is located at the intracorporal filter material layer lower part in the pond, and upper port is located in the cleaning water deflector, the pipe of the riser
Interior to be equipped with turbulent water structure, the middle part of the riser is equipped with riser air inlet, and the riser air inlet connection is promoted
Gas air supply pipe, the cleaning water deflector includes air deflector shell, and the air deflector shell is in the cylinder coaxial with the riser
Shape inside sets deflector, and the deflector is in the up big and down small cone barrel coaxial with the air deflector shell, the deflector
Upper periphery is connect with the inner wall of the air deflector shell, between the lower port edge and the riser of the deflector there are
The inside of annular spacing, the air deflector lower part of the housing is equipped with overflow launder, and the overflow launder and the air deflector shell are coaxial, institute
The outer wall for stating overflow launder directlys adopt the air deflector shell or is fitted on the baffle shell, the overflow launder it is interior
Wall is in the up big and down small cone barrel coaxial with the air deflector shell and port is greater than the lower port of the deflector, institute thereon
The top for stating overflow launder inner wall is ejected wash water overflow weir, and the bottom of the overflow launder is equipped with cleaning water discharge spout.This is that one kind can
To control the novel sewage treatment unit of hardened and continuous, the automatic carry out filtrate cleaning of filtrate, belong to the biomembrane of moving-bed type
Filter tank reactor, core function are to carry out biochemical reaction by the biomembrane being supported on filtrate to remove the pollution in sewage
Object takes the operational mode different from traditional biological filter tank, may be implemented filtrate continuous automatic cleaning and equipment not between
Disconnected continuous operation.The cleaning of filtrate mainly realized by filtrate washer and cleaning water deflector, filter positioned at filter material layer bottom
Material is constantly elevated pipe and extracts to being cleaned in filtrate washer, and the filtrate after cleaning constantly returns to the upper table of filter material layer
Face realizes the automatic continuous cleaning of filtrate during the work time, transform ejected wash water overflow weir therein as controllable activity
Weir plate, such as gas control weir plate, or overflow crest of weir is set on the overflow launder inner wall, with the movable weir plate that is disposed over into
The closing of row overflow crest of weir and open wide, overflow crest of weir and movable weir plate can using similar to lock system form or other
Anticipate suitable form, movable weir plate can be it is pneumatic, when movable weir plate closes overflow crest of weir, ejected wash water cannot be discharged, and work as work
When dynamic weir plate is detached from overflow crest of weir, the ejected wash water on the inside of overflow crest of weir is able to overflow to the overflow launder in outside from overflow crest of weir
It is interior, and then pass through cleaning water discharge spout discharge.
Moving bed biological filter tank reactor has the advantages that
1) cleaning of filtrate is not required to additional pump equipment, backwash pump as needed for traditional aeration biofilter etc.,
Therefore corollary equipment and autocontrol valve is greatly saved, can reduces by 60% equipment installed capacity, and reduce 25% or more
Cost of investment；
2) moving bed biological filter tank reactor keeps continuous operation continuous wash to carry out state simultaneously, does not need interval and shuts down
Backwash.Entire reaction process filtrate is slow flow regime, so it is hardened to generate filtrate；Without reserving filtrate backwash expansion
Space, capacity utilization are higher；
3) the filtrate dead zone of moving bed biological filter tank reactor is less, and mass-transfer efficiency is higher, and treatment effeciency is higher；
4) continuous filtrate cleaning way is used, cleaning effect is more preferable, and filtering layer top keeps certain thickness clean filter bed, out
Water water quality is more stable；
5) reactor is discharged by individual passage in filtrate ejected wash water, avoids pollution clear water layer, and it is raw to overcome traditional fixed bed
Periodicity effluent quality fluctuation problem existing for object filter tank.
Since this equipment is by the removal of biology proliferation and retention realization pollutant, the excess sludge yield generated
The pollutant removed with it is proportional, the every removal 1kg COD of this equipmentCr, about generate 0.1-0.2kg dewatered sludge, removal
1kg suspended matter, about generation 0.3-0.5kg dewatered sludge.In actual operation, waste water quality and water be all in continuous variation,
Therefore the speed that sludge generates is changing also with water quality and quantity.To keep stable operation, biomass will be protected in usual reactor
It holds in a certain amount.
However, moving bed biological filter tank reactor cleaning control mode is to pass through people according to experiment or experience setting at present
The adjustment of industry control system promotes scavenging air amount and ejected wash water vent valves, or carries out promotion scavenging air by timing control circuit
It is controlled with the constant cycle of ejected wash water vent valves.There are following several respects in this control mode:
1) when change of water quality is more violent, cleaning parameters need to be often manually adjusted, are controlled by promoting the adjustment of air capacity
Cleaning speed processed, when tolerance is too small, filtrate is promoted difficult；When tolerance is excessive, filtrate cleaning effect is poor, influences effluent quality；
It is more complex that operation is adjusted simultaneously, and not precisely, human factor influences big, it is difficult to realize that servo-actuated adjustment even malfunctions；
2) under reduction process load, the intensity of filtrate continuance lifting cleaning is excessive, and it is very few to will cause microbial biomass in filter tank,
Treatment effeciency and impact resistance decline；
3) at low load, the water consumption of filtrate continuous wash is higher.Treatment scale is reduced, waste water needs to reprocess,
Improve processing cost.
Summary of the invention
The purpose of the present invention is realizing preferably to automatically control this kind of moving bed biological filter tank reactor, according to real
Border situation dynamic regulation cleaning strength, the microbial biomass in holding system reduce cleaning water consumption, improve Treatment Stability.
The technical scheme is that
A kind of cleaning control method is adapted to the cleaning control of moving bed biological filter tank reactor, according to following equation meter
Calculate the duration t of single cleaning process:
In formula:
T is the single cleaning process duration；
Y is sludge yield coefficient；
Q is day to add up inflow；
S0For influent CODCr；
SeTo be discharged CODCr；
F is non-degradable suspended matter ratio；
SS0For suspended matter of intaking；
X is microorganism total amount in filter tank；
N is daily execution cleaning frequency number；
N daily filtrate clean cycle number when being continuous wash.
It is preferably provided with water monitoring device, regular or real-time detection following data: day adds up inflow, influent CODCr, go out
Water CODCr, water inlet suspended matter and water inlet suspended matter, and carry out according to the data that are monitored the duration of single cleaning process
Calculating.
The sludge yield coefficient can take 0.1-0.2.
The non-degradable suspension can take 0.3-0.5 with object.
It is preferred that being carried out simultaneously with the cleaning for organizing filtrate circulator, no using the same control cabinet to multiple groups filtrate circulator
Cleaning with group filtrate circulator is successively carried out or is carried out simultaneously.
Cleaning process is as unit of the cleaning frequency, and each cleaning frequency includes 2 process sections, is the cleaning execution phase respectively
With the cleaning intermittent phase.
Clean the execution step (process) of execution phase are as follows: 1. open gas control weir plate SCS Air Suction Control Solenoid, open gas control weir
Plate carries out ejected wash water discharge；Magnet valve is controlled 2. opening and promoting gas air inlet, promotion cleaning is carried out to filtrate, this step duration is
The single cleaning process duration t；3. after reaching the single cleaning predetermined time, first closing and promoting gas air inlet control magnetic
Valve stops filtrate and promotes cleaning, after delay certain time (such as 1-2min), closes gas control weir plate SCS Air Suction Control Solenoid, stop
Only ejected wash water drains.
The cleaning executes phase and cleaning intermittent phase when switching over, device continuous operation, Inlet and outlet water, the equal nothing of aeration
It need to switch or adjust, not blowdown when cleaning the intermittent phase.
A kind of cleaning control system uses any one cleaning control method disclosed by the invention to carry out cleaning control,
It is adapted to the cleaning control of moving bed biological filter tank reactor, comprising:
Water monitoring device, for Inlet and outlet water water quality and water be monitored, obtain and calculate single cleaning process
The data that monitoring obtains needed for duration；
Control device, receives to be originated from and is manually entered and the data from water monitoring device, is calculated using following equation single
The duration t of secondary cleaning process:
In formula:
T is the single cleaning process duration；
Y is sludge yield coefficient；
Q is day to add up inflow；
S0For influent CODCr；
SeTo be discharged CODCr；
F is non-degradable suspended matter ratio；
SS0For suspended matter of intaking；
X is microorganism total amount in filter tank；
N is daily execution cleaning frequency number；
N daily filtrate clean cycle number when being continuous wash adds up filtrate for 24 hours and mentions when being carried out continuously filtrate promotion
The ratio of rising amount and filtrate total amount is equivalent to daily circulation n times, for example, it is assumed that the total 50m3 of filtrate in reactor, promotes cleaning speed
Degree is 1m3/h, then 24 hours continuous wash amounts are 24m3, daily cycle-index, that is, 24/50=0.48 times.I.e. in continuance lifting
When, daily filtrate recycles 0.48 time；
Executive device is equipped with filtrate washer control valve group, gas control weir plate control valve group, filtrate washer gas source control pipe
Road system and gas control weir plate gas source control piping system, the filtrate washer control valve group include several promotion gas air inlet controls
Magnet valve, the gas control weir plate control valve group include several gas control weir plate SCS Air Suction Control Solenoids, the filtrate washer gas source control
Pipe-line system processed is equipped with the promotion gas gas source pipeline for being separately connected each controlled promotion gas air inlet pipe；The gas control weir plate gas source control
Pipe-line system processed is equipped with the gas control weir plate gas source pipeline for being separately connected each controlled gas control weir plate air inlet pipe；Each promotion gas gas
The external tapping on source capsule road is for being separately connected controlled corresponding promotion gas air inlet pipe, as the gas source for promoting gas air inlet pipe；
The external tapping of each gas control weir plate gas source pipeline is for being separately connected controlled corresponding gas control weir plate air inlet pipe, as the gas
Control the gas source of weir plate air inlet pipe；Each promotion gas air inlet control magnet valve is separately mounted to the corresponding promotion gas gas source pipeline
On, for controlling the on-off for promoting gas gas source pipeline；Each gas control weir plate SCS Air Suction Control Solenoid is separately mounted to phase
The gas control weir plate gas source pipe road answered, for controlling the on-off of the gas control weir plate gas source pipeline；Each promotion gas into
The control input and output side of gas control magnet valve is separately connected corresponding control output and the input terminal of the control device, according to institute
The corresponding control signal for stating control device carries out movement and executes itself and feedback states；Each gas control weir plate SCS Air Suction Control Solenoid
Control input and output side be separately connected the control device corresponding control output and input terminal, according to the control device
Corresponding control signal carry out movement and execute itself and feedback states.
The water monitoring device can be at least to add up inflow, influent COD for acquiring dayCr, water outlet CODCr, into
The on-Line Monitor Device of aqueous suspension and water inlet suspended matter.
The control device and executive device are preferably provided at the same intelligent cleaning control case.
The intelligence cleaning control case can be divided into upper box and lower box two parts, and upper box is provided with as the control
PLC, control module and the display control screen of device processed, lower box are air distributor box, are equipped in cabinet as executive device
The filtrate washer control valve group, gas control weir plate control valve group, filtrate washer gas source control piping system and gas control weir
Plate gas source control piping system.
It is also provided in the intelligent control box or outside the intelligent control box for gas source purification and gas source distribution
Gas source processing module, the filtrate washer gas source control piping system and gas control weir plate gas source control piping system are all made of
Air cylinder manifold, the outlet end of each air cylinder manifold constitute the external tapping of each corresponding gas source pipeline, and each air converges
The input end of flowing plate connects compressed air source by the gas source processing module.
A kind of moving bed biological filter tank reactor (MBFR) system, including moving bed biological filter tank reactor (MBFR), institute
It states moving bed biological filter tank reactor (MBFR) and cleaning control is carried out using any cleaning control method disclosed by the invention, or
Cleaning control is carried out using any cleaning control system disclosed by the invention.
The beneficial effects of the present invention are: automatically obtaining the reality for carrying out automatically controlling according to available data processing technique
Border condition parameter calculates suitable scavenging period automatically and is controlled accordingly moving bed biological filter tank reactor, more
Actual conditions are adapted to well, not only improve to avoid causes Internal biological film/biological sludge excessive because cleaning strength is too low
Biological activity is deposited and loses, the biotic environment in deterioration system reduces the degree of purification of water outlet, and is conducive to avoid because of cleaning
Intensity is excessive and the excessive of biological sludge is caused to be lost and generate unnecessary cleaning water consumption, the biochemical reaction in reduction system
Intensity and detergent power, the present invention can be better adapted to the variation of influent quality and water, the life in maintenance system as a result,
State environment, keep system stabilization and effectively operation, guarantee water outlet degree of purification, and reduce unnecessary cleaning water consumption with
Power consumption.
Detailed description of the invention
Fig. 1 is control principle drawing of the present invention；
Fig. 2 is the organigram of control cabinet of the present invention；
Fig. 3 is the construction signal of the moving bed biological filter tank reactor of the present invention equipped with multiple filtrate circulators
Figure；
Fig. 4 is the organigram of the single filtrate circulator of moving bed biological filter tank of the present invention reactor；
Fig. 5 is the local structure schematic diagram of single filtrate circulator of the present invention；
Fig. 6 is the structural schematic diagram for the biological aerated filter that the filtrate that CN105016462A is disclosed automatically continuously cleans.
Specific embodiment
Referring to Fig. 1-5, cleaning control method of the invention and cleaning control system are used to react moving bed biological filter tank
The cleaning control of device is especially used for the cleaning control of the corresponding biochemical processing device of sewage/wastewater treatment.In general, reactor
Pond body 201 in several vertical filtrate circulators (referring to Fig. 3-5), the filtrate circulator is mainly by filtrate washer 220
It is constituted with cleaning water deflector 210, the filtrate washer is typically provided with vertical riser, and is equipped with end and is opened on promotion
Promotion gas air supply pipe 225 in pipe, is supplied with promoting gas air inlet pipe into riser, and the gas of output rises, in riser
Lower section forms certain negative pressure, thus the water for being located at pond body lower part is driven to enter riser together with biofilter material and rise,
It forms gas-liquid-solid three-phase and mixes agitation situation, by this mixing agitaion, and can be by the way that disturbing in riser is arranged in
Flow structure strengthens stirring effect, and the part biological film (biological sludge) of filter material surface is made to remove and fall off, and gas-liquid-solid three-phase is mixed
It closes logistics constantly to rise, enters in the cleaning water deflector being located above filtrate washer from the upper end opening of riser and realize gas
The separation of liquid, ejected wash water pass through overflow crest of weir or hole outflow on the deflector 212 of tubular, flow into the overflow on the outside of deflector
In slot (draining catch basin), and then the cleaning water discharge spout 214 by being located at isopipe root is discharged, overflowing on the deflector
Gas control weir plate (or flashboard) 211 should be usually set on stream crest of weir or hole, the pneumatic draining weir plate be equipped with gas control weir plate into
Tracheae 215 drives its movement after ventilation, to realize the opening and closing to overflow crest of weir or hole, needing that ejected wash water is discharged
When overflow crest of weir or hole are opened wide, allow ejected wash water to flow out, when should not drain here, overflow crest of weir or hole sealed
It closes, makes water can not be by overflow crest of weir or hole.Related moving bed biological filter tank reactor can be using the existing of any suitable
Technology, such as when the biological aerated filter automatically continuously cleaned using filtrate disclosed in CN105016462A, it can be clear by it
Wash water overflow weir is transformed or is limited to the gas control weir structure that can be opened and closed, and overflow crest of weir or hole are arranged on its deflector
Hole and configuration can open and close the gas control weir plate of overflow crest of weir or hole, and gas control weir structure can be existing using being similar to
There is sluice structure, the opening and closing of fault of water stream channel at sluice is carried out by gas control weir plate (flashboard).
In the embodiment for the moving bed biological filter tank reactor that Fig. 3-Fig. 5 is provided, construction and working method and
The biological aerated filter that filtrate disclosed in CN105016462A automatically continuously cleans is essentially identical, used in gas control weir plate include
It can close and open wide the plate body of corresponding overflow crest of weir or hole and for controlling cylinder that plate body moves up and down and for limiting
Fixed board body moves up and down the guide frame (structures such as guide rail or the guide chute under the prior art can be used) of track, can be normal
Closed state, by gas control weir plate air inlet pipe to output gas in cylinder, drives cylinder when needing to open overflow crest of weir or hole
It takes offence and controls weir plate and move up, overflow crest of weir or hole are opened wide, ejected wash water is flowed out, deflate when not needing draining, gas control
Weir plate resets under the action ofs self weight and/or reset spring etc., recloses corresponding overflow crest of weir or hole.
Due to present invention relates solely to other constructions of the improvement to cleaning control, reactor can be according to the prior art, example
Such as, setting water inlet main pipe 207, aeration main pipe 208, water outlet/pipe 209, integral type or split type water-gas distribution device 202 and
Filtrate distributor 204 can fill biofilter material 203 according to the prior art, filtrate water conservancy diversion bucket etc. can be set.
Cleaning control system of the present invention is mainly made of water monitoring device and intelligent cleaning control case, according to water
The data that quality detecting device monitors, it is automatic to set filtrate cleaning procedure according to influent quality, adjust filtrate cleaning speed, dimension
Hold in filtrate that biomass is in proper range, to increase impact resistance.
Water monitoring device and its information collection and data transmission can be using online according to the prior art, major function
Instrument monitoring influent quality and water, Xiang Zhineng cleaning control case transmit water quality data.Main monitoring project includes influent CODCr
Content, suspended matter etc. are used to determine the water quality indicator of cleaning model.
Intelligent cleaning control case is divided into 102 two parts of upper box 101 and lower box, upper box be provided with PLC circuit 104,
Control module 105 and display control screen 103, lower box are air distributor box, are air distribution system in cabinet, due to the present invention
Control executive component be each gas pipeline electric control valve (for example, solenoid valve), can be according to existing programmed method and hardware
Facility realizes that the required cleaning control parameter of the present invention calculates and carries out cleaning control according to calculated result.
The effect of PLC and control module be receive water monitoring data after, by plug-in, calculation processing load and production
Mud amount, it is automatic to set cleaning speed and period.Its implementation are as follows: by amount of inlet water and CODCr, the pollutants such as suspended matter
Concentration is calculated, and by following empirical equation, the scavenging period of each cleaning frequency is calculated, then to air distribution system
Instruction is sent, so that starting filtrate circulator carries out cleaning.
The calculation formula of use is as follows:
In formula:
T is every time the cleaning duration, and unit can be h；
Y is sludge yield coefficient, and unit can be kg sludge/kg CODCr, can empirically be worth setting, may generally be
0.1-0.2；
Q is day to add up inflow, and unit can be m3/ d, data come from water monitoring device；
S0For influent CODCr, unit can be kg/m3, data are from water monitoring device；
SeTo be discharged CODCr, unit can be kg/m3, data are from water monitoring device；
F is non-degradable suspended matter ratio, can empirically be worth setting, may generally be 0.3-0.5；
SS0For suspended matter of intaking, unit can be kg/m3, data are from water monitoring device；
X is microorganism total amount in filter tank, and unit can be kg, can empirically be worth setting or Stratified Sampling measurement；
N is daily cleaning frequency number, can be according to actual needs and experience setting；
N daily filtrate clean cycle number when being continuous wash, unit can be d-1, according to measured value.
The effect of display control screen is responsible for parameter input and working condition shows that the setting values such as Y, F, X, N, n are inputting
It is inputted on interface, Q, S0When equal determination datas inaccuracy or non-availability, specified data can also be inputted.
Automatic/hand mode switching key can be set, scavenging period and period can be manually entered, in a manual mode with side
Just various situations are coped with.
Do not stop fluctuation status since amount of inlet water and water quality are in, filtrate scavenging period also should be with water quality and quantity wave
Dynamic to carry out dynamic adjustment, PLC calculates the single cleaning process duration according to monitoring data daily, and such as variation is more than certain threshold
(may be configured as 10% or 0.5h), then carry out parameter adjustment.
Air distribution system is mainly by 106,2 air cylinder manifolds of gas source processing module 107,108, promotion gas air inlet control
The components such as magnet valve (group) 112, gas control weir plate SCS Air Suction Control Solenoid (group) 111 and promotion air-flow meter.
The gas source processing module is mainly made of oil removing removal filtration device and pressure-regulating valve, two air cylinder manifolds point
Not Dui Yingyu multiple filtrate circulators promotion gas air inlet pipe and gas control weir plate air inlet pipe, it is correspondingly, each to promote gas air inlet control
Solenoid valve and each gas control weir plate SCS Air Suction Control Solenoid are separately mounted in the corresponding gas circuit of respective air cylinder manifold, thus same
A intelligence cleaning control case can control multiple groups filtrate circulator.
The scavenging air flowmeter has tolerance adjusting and display function, cleans tolerance for average each group filter tank, together
When acquisition data for correcting cleaning procedure.The method of operation of air distribution system are as follows: PLC provides control instruction, and control respectively mentions
Liter gas air inlet control magnet valve, gas control weir plate SCS Air Suction Control Solenoid open or close, to provide to corresponding filtrate circulator
Compressed air achieves filtrate cleaning.
Against the background of the prior art, consider the factors such as cost and site layout project, a set of intelligence cleaning control case may be implemented
The automatic cleaning control of 8-10 group filtrate circulator, every group of filtrate circulator successively put into cleaning, realize ejected wash water average emission,
Instantaneous water is reduced, pipeline engineering amount and subsequent processing facility scale can be effectively reduced.By program setting, it can be achieved that each group is filtered
Expect circulator operating parameter independent control, improves operating flexibility.
Cleaning can successively can be put into every group of filter tank under PLC control, cleaning can also be put into simultaneously with several groups.
Since filtrate circulator is mainly made of cleaning water deflector and filtrate washer.It is empty when cleaning procedure starts
Gas control system provides 2 tunnel compressed airs to every group of biofilter, enters corresponding gas control weir plate through gas control weir plate air inlet pipe all the way
Cylinder, starting gas control weir plate carries out ejected wash water discharge, and the boosted gas air inlet pipe of another way enters filtrate washer, starts filtrate
Clean cycle.
The gas control weir plate is mainly made of the main body of draining weir plate (may be simply referred to as weir plate or plate body), cylinder and push rod,
Push rod connects cylinder rod and weir plate, weir plate can be made to slide the opening and closing for realizing weir plate in guide rail, when compressed air is passed through
When cylinder, cylinder pushes push rod, drives weir plate to open and realizes ejected wash water discharge, when compressed air is closed, in the rebound of cylinder
Under effect, weir plate closes cutting ejected wash water discharge.
Unlatching and ejected wash water discharge due to weir plate need certain time, generally require 1-2 minutes.Gas control weir plate and filtrate
Washer is supplied to gas control weir plate air inlet pipe by PLC chain control when executing beginning cleaning command first, opens gas control
Weir plate is then turned on the gas supply to gas control weir plate air inlet pipe, stops cleaning executing after receiving the relevant execution feedback of gas control weir plate
When order, the gas supply to gas control weir plate air inlet pipe is first closed, when ejected wash water is thoroughly discharged and then closed in cleaning water deflector
Gas control weir plate air inlet pipe makes overflow crest of weir or hole cavities close.
It is required according to distinct device situation and control, the opening and closing time of the gas control weir plate may be set to filtrate
It is promoted 0.5-1 minutes before cleaning is opened and is opened, filtrate is promoted 1-2 minutes after cleaning stops and closed.
Specific workflow is as follows:
Water quality that water monitoring device measures, water data, are automatically entered into PLC, and PLC calculates Q automatically, and (day is accumulative
Inflow), S0(average influent CODCr)、Se(averagely water outlet CODCr)、SS0Numerical value such as (averagely water inlet suspended matters)；
Operator inputs Y (sludge yield coefficient), F (non-degradable suspended matter ratio), X (filter on display control screen
Microorganism total amount in pond), N (cleaning the number of starts daily), the numerical value such as n (daily cycle-index), and to automatic monitoring data into
Row checks amendment；
PLC calculates the required cleaning duration according to formula (1), and executes cleaning procedure according to the time.
When the cleaning execution phase starts, PLC module, which issues, executes signal, and control module operates the air inlet of gas control weir plate and controls electromagnetism
Valve is opened, and compressed air is passed through gas control weir plate and turns on, and cleaning waste water is discharged from overflow crest of weir or hole；Gas control weir plate is in place
Backward PLC module issues feedback signal, and control module operation promotes gas air inlet control magnet valve and opens, and it is clear that compressed air is passed through filtrate
Device is washed, filtrate, which starts to be promoted, to be cleaned.
When reaching single scavenging period, PLC, which is issued, executes signal, and control module operation promotes gas air inlet control magnet valve and closes
It closes, compressed air stopping is passed through filtrate washer, and filtrate, which is promoted, to be stopped.Ejected wash water discharge finishes after 2min, control module operation
Gas control weir plate SCS Air Suction Control Solenoid is closed, and compressed air stopping is passed through gas control weir plate, and gas control weir plate, which resets, stops draining, gas control
Feedback signal is issued to PLC module after weir plate reset, system enters the cleaning intermittent phase, waits cleaning execution next time.
By taking certain factory's oil refining sewerage advanced treatment unit as an example, moving bed biological filter tank reactor assembly sets 10 sets of filtrates altogether and follows
Ring device can set 10 groups while be cleaned in PLC, can also 2 groups successively cleaned for a batch.Daily wash number n
It is set as 2 times, PLC is calculated according to current water quality data cleans the duration every time as 2h, and daily execute is cleaned twice, every time
It cleans after continuing 2h and stops；When acute variation occurs for water quality and quantity, such as next day amount of inlet water cumulative rises 20%, influent CODCr
Cumulative rises 10%, PLC by recalculate cleaning the duration be 2.6h after, be more than adjustment time threshold 0.5h, PLC oneself
Dynamic adjustment scavenging period parameter.
Moving bed biological filter tank reactor assembly of the invention includes moving bed biological filter tank reactor, and the moving bed is raw
Object filter tank reactor is equipped with the gas control weir plate for promoting gas air inlet pipe and control for ejected wash water draining for carrying out filtrate cleaning
Air inlet pipe uses any one cleaning control system disclosed by the invention to carry out cleaning control, each promotion gas gas source pipe
The external tapping on road is separately connected controlled corresponding promotion gas air inlet pipe, as the gas source for promoting gas air inlet pipe, each gas
The external tapping of control weir plate gas source pipeline is separately connected controlled corresponding gas control weir plate air inlet pipe, as the gas control weir plate air inlet pipe
Gas source.
It is disclosed by the invention it is each preferably with optional technological means, unless otherwise indicated and one preferably or can selecting technology hand
Section is that further limiting for another technological means is outer, can form several different technical solutions in any combination.
Claims (10)
1. a kind of cleaning control method is adapted to the cleaning control of moving bed biological filter tank reactor, it is characterised in that according under
The duration t of column formula calculating single cleaning process:
In formula:
T is the single cleaning process duration；
Y is sludge yield coefficient；
Q is day to add up inflow；
S0For influent CODCr；
SeTo be discharged CODCr；
F is non-degradable suspended matter ratio；
SS0For suspended matter of intaking；
X is microorganism total amount in filter tank；
N is daily execution cleaning frequency number；
N daily filtrate clean cycle number when being continuous wash.
2. the method as described in claim 1, it is characterised in that water monitoring device, columns under regular or real-time detection is arranged
According to: day adds up inflow, influent CODCr, water outlet CODCr, water inlet suspended matter, and it is clear according to the data that are monitored to carry out single
Wash the calculating of the duration of process.
3. method according to claim 2, it is characterised in that the sludge yield coefficient takes 0.1-0.2, the non-degradable
Suspended matter takes 0.3-0.5.
4. method according to claim 2, it is characterised in that using the same control cabinet to multiple groups filtrate circulator, with group filter
The cleaning of material circulator carries out simultaneously, and the cleaning of difference group filtrate circulator is successively carried out or carried out simultaneously.
5. method according to claim 2, it is characterised in that cleaning process is each cleaning frequency as unit of the cleaning frequency
It is cleaning execution phase and cleaning intermittent phase, the execution step of the cleaning execution phase are as follows: 1. beat respectively including 2 process sections
Gas control weir plate SCS Air Suction Control Solenoid is opened, gas control weir plate is opened and carries out ejected wash water discharge；Magnet valve is controlled 2. opening and promoting gas air inlet,
Promotion cleaning is carried out to filtrate, this step duration is the single cleaning process duration (t) described in claim 1；
3. after reaching the single cleaning predetermined time, first closing and promoting gas air inlet control magnet valve, stops filtrate and promote cleaning, delay one is periodically
Between after, close gas control weir plate SCS Air Suction Control Solenoid, stop ejected wash water draining, wash the execution phase and cleaning the intermittent phase switching over
When, device continuous operation, Inlet and outlet water, aeration are without switching or adjustment, not blowdown when cleaning the intermittent phase.
6. a kind of cleaning control system is adapted to the cleaning control of moving bed biological filter tank reactor, characterized by comprising:
Water monitoring device, for Inlet and outlet water water quality and water be monitored, obtain and calculate single cleaning process and continue
The data that monitoring obtains needed for time；
Control device, receives to be originated from and is manually entered and the data from water monitoring device, and it is clear to calculate single using following equation
Wash the duration t of process:
In formula:
T is the single cleaning process duration；
Y is sludge yield coefficient；
Q is day to add up inflow；
S0For influent CODCr；
SeTo be discharged CODCr；
F is non-degradable suspended matter ratio；
SS0For suspended matter of intaking；
X is microorganism total amount in filter tank；
N is daily execution cleaning frequency number；
N daily filtrate clean cycle number when being continuous wash；
Executive device is equipped with filtrate washer control valve group, gas control weir plate control valve group, filtrate washer gas source control piper system
System and gas control weir plate gas source control piping system, the filtrate washer control valve group include several promotion gas air inlet control magnetic
Valve, the gas control weir plate control valve group include several gas control weir plate SCS Air Suction Control Solenoids, the filtrate washer gas source control
Pipe-line system is equipped with the promotion gas gas source pipeline for being separately connected each controlled promotion gas air inlet pipe；The gas control weir plate gas source control
Pipe-line system is equipped with the gas control weir plate gas source pipeline for being separately connected each controlled gas control weir plate air inlet pipe；Each promotion gas gas source
The external tapping of pipeline is for being separately connected controlled corresponding promotion gas air inlet pipe, as the gas source for promoting gas air inlet pipe；Respectively
The external tapping of the gas control weir plate gas source pipeline is for being separately connected controlled corresponding gas control weir plate air inlet pipe, as the gas control
The gas source of weir plate air inlet pipe；Each promotion gas air inlet control magnet valve is separately mounted to the corresponding promotion gas gas source pipeline
On, for controlling the on-off for promoting gas gas source pipeline；Each gas control weir plate SCS Air Suction Control Solenoid is separately mounted to phase
The gas control weir plate gas source pipe road answered, for controlling the on-off of the gas control weir plate gas source pipeline；Each promotion gas into
The control input and output side of gas control magnet valve is separately connected corresponding control output and the input terminal of the control device, according to institute
The corresponding control signal for stating control device carries out movement and executes itself and feedback states；Each gas control weir plate SCS Air Suction Control Solenoid
Control input and output side be separately connected the control device corresponding control output and input terminal, according to the control device
Corresponding control signal carry out movement and execute itself and feedback states.
7. system as claimed in claim 6, it is characterised in that the water monitoring device be at least for acquire add up day into
Water, influent CODCr, water outlet CODCr, water inlet suspended matter and intake suspended matter on-Line Monitor Device.
8. system as claimed in claim 6, it is characterised in that the control device and executive device are arranged in the same intelligence
Cleaning control case, the intelligence cleaning control case are divided into upper box and lower box two parts, and upper box is provided with as the control
PLC, control module and the display control screen of device processed, lower box are air distributor box, are equipped in cabinet as executive device
The filtrate washer control valve group, gas control weir plate control valve group, filtrate washer gas source control piping system and gas control weir
Plate gas source control piping system.
9. system as claimed in claim 6, it is characterised in that gone back in the intelligent control box or outside the intelligent control box
Equipped with the gas source processing module for gas source purification and gas source distribution, the filtrate washer gas source control piping system and gas control
Weir plate gas source control piping system is all made of air cylinder manifold, and the outlet end of each air cylinder manifold constitutes each corresponding gas source
The input end of the external tapping of pipeline, each air cylinder manifold connects compressed air source by the gas source processing module.
10. a kind of moving bed biological filter tank reactor assembly, including moving bed biological filter tank reactor, it is characterised in that the shifting
Dynamic bed biofilter reactor carries out cleaning control using any method of claim 1-5, or uses claim
Any system of 6-9 carries out cleaning control.
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| CN114516665A (en) * | 2022-02-23 | 2022-05-20 | 中原环保股份有限公司 | Method and device suitable for cleaning sewage treatment facility |
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Application publication date: 20191129 |