CN104649404B - The system and method for the sewage discharge after accurately control processes - Google Patents

The system and method for the sewage discharge after accurately control processes Download PDF

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Publication number
CN104649404B
CN104649404B CN201510095039.0A CN201510095039A CN104649404B CN 104649404 B CN104649404 B CN 104649404B CN 201510095039 A CN201510095039 A CN 201510095039A CN 104649404 B CN104649404 B CN 104649404B
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Prior art keywords
water gate
gate
pond
muddy water
transmissometer
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CN104649404A (en
Inventor
汪喜生
吕瑞滨
杜兴治
季红先
徐耀
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Shi Dongkou Sewage Treatment Plant Of Shanghai Chengtou Sewage Management Co Ltd
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Shi Dongkou Sewage Treatment Plant Of Shanghai Chengtou Sewage Management Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes
    • C02F3/12Activated sludge processes
    • C02F3/1236Particular type of activated sludge installations
    • C02F3/1263Sequencing batch reactors [SBR]
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/04Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/002Construction details of the apparatus
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/005Processes using a programmable logic controller [PLC]
    • C02F2209/008Processes using a programmable logic controller [PLC] comprising telecommunication features, e.g. modems or antennas
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/11Turbidity

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Microbiology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Activated Sludge Processes (AREA)

Abstract

The present invention relates to the system of the sewage discharge after a kind of accurate control processes, described system includes integrated reacting pond, transmissometer and host computer;Described integrated reacting pond is provided with several muddy water gate and several clear water gate;And on described muddy water gate, it being provided with transmissometer, described transmissometer communicates with described host computer, and described host computer is connected with described clear water gate and described muddy water gate;The invention still further relates to a kind of method realizing the sewage discharge after accurate control processes.Use the system and method for the sewage discharge after the accurate control process of this kind of structure, improve the precision of on-line checking, improve sewage disposal qualified discharge rate, alleviate manpower management cost, improve the actual achievements such as the efficiency of management, meet emission request, high treating effect, operating cost is low, regulates more flexible, and control accuracy is high, dependable performance, has wide range of applications.

Description

The system and method for the sewage discharge after accurately control processes
Technical field
The present invention relates to Mechanical course field, particularly relate to sewage disposal, specifically refer to the sewage row after a kind of accurate control processes The system and method put.
Background technology
One, domestic and international environmental protection industry (epi) system transports pipe present situation with sewage disposal (factory)
Current generation, along with the development of human society, the continuous expansion of city size, the water consumption in city and displacement are all Being continuously increased, exacerbating the anxiety with water and the pollution of water quality, environmental problem becomes increasingly conspicuous, the water crisis thereby resulted in and ring Border ecological pollution, the environment protection treating facilities management important restriction factor having become as socio-economic development out of control.
At present, one of environmental protection fundamental state policy being established as China, present flourish gesture in recent years, and ring It is right that many focus and emphasis fields numerous domestic scholar especially of border scientific and engineering, scientific research personnel and engineers and technicians pay close attention to As, wastewater treatment in China cause the most also achieves development rapidly in nearly the two of reform and opening-up, by environmental worker's Unremitting effort, the new technology in terms of many sewage disposals, new technology, new equipment, new material are applied in China, wherein In terms of sewage treatment technology, " activated sludge process " technological development is rapid, has the most become the leading of wastewater treatment in China Technique, achieves many achievements in research and abundant engineer applied and operational management experience.
But due to technology, economy, the restriction of management condition, many sewage all fail to accomplish the qualified discharge of 100%, along with water ring The pollution in border is on the rise, and country " 12 " period, State Council has issued three files continuously, and " State Council is about reinforcing ring Border key protection point opinion on work (promulgated by the State Council [2011] 35) ", " State Council about print and distribute national environmental protection " 12 " rule The notice (promulgated by the State Council [2011] 42) drawn, " State Council is about causing the logical of the comprehensive programme of work of " 12 " energy-saving and emission-reduction Know, be based upon and thoroughly apply the Scientific Outlook on Development, improve conservation culture, improve environmental protection Supervision Management Level comprehensively, add Strong major pollutants total amount reduces discharging, and existing sewage treatment plant carries out upgrading, strengthening facility operation supervision, disposes ring in accordance with the law Environment pollution and ecological disruption event, deepen major fields integrated pollution control, implements water head site environmental renovation, recovers and build work Journey, compliance rate of increasing water quality;Planning notice (promulgated by the State Council [2011] 42) main target requires building of town environment infrastructure If with operation level gets a promotion, water quality increases substantially, and puts forth effort to cut down COD (CODcr) and ammonia nitrogen discharge capacity.Carry Rising urban wastewater treatment level, to the end of the year 2015, it is achieved newly-increased sewage daily handling ability forty-two million ton, sewage treatment facility is born Lotus rate brings up to more than 80%, and treatment rate of domestic sewage reaches 85%.Strengthen sewage treatment facility to run and pollutant fluxes assessment Examination, advances municipal sewage plant's monitor supervision platform to build.Department's Coordinate development environmental protection, house town and country construction department to add The construction of strong town and country wastewater treatment facility and operation management;In the notice of energy conservation scheme, it is desirable to suit measures to local conditions to advance low cost, easily The sewage treatment facility construction safeguarded, strengthening energy-saving and emission-reduction supervision and check are accelerated to formulate urban drainage and sewage disposal regulations, are strengthened Major polluting sources and treatment facility run supervision, the state key environmental monitoring enterprise name in good time issuing that major pollutants exceed standard serious Single, strengthen municipal sewage plant's monitor supervision platform and build, improve waste water collection rate, carry out operation and pollutant fluxes evaluation, The result of appraisal are as the important evidence examining and allocating sewage disposal expense.
In the another up-to-date the Law on Environmental Protection of the People's Republic of China currently implemented, about the requirement of general provisions, supervision with Manage, protect and improve environment, prevent pollution and other public hazards, information disclosure and public participation, legal liabilities etc. from blowdown being looked forward to The regulation of industry and pollution treatment enterprise has played the forte of history.
In view of the above, China in the urgent need to a collection of meeting that emission request, high treating effect, operating cost be low, regulation more Flexibly, control accuracy is high, the New Technology about Wastewater Treatment of dependable performance and new technology, and is preferably easy to what operational management controlled Innovation auxiliary new technology.
From the point of view of practical operation, country is in order to prevent and treat environmental pollution, and maintaining ecological balance, protection population health, to environmental work The middle every technical specification needing unification and technology require to be made that a series of regulation and standard, have the binding character of regulation, are Law on Environmental Protection is given, and the Historic Evolution worked from a series of environmental standard so far, establishes " exceeding standard the most illegal " Thought.In the enforcement monitor mode of environmental standard, the supervision of standard implementation can be divided into self-supervision and management supervision.
Managerial supervision is mainly responsible for by environmental protection administrative responsibile institution at different levels, embodies the supervision to standard implementation and inspection.It is basic Starting point be " up to standard ", the detection of the means of employing generally supervision property and check, selective examination.Enforcement to environmental quality standards is supervised Superintending and directing, generally fixed sample point position, the routine monitor of fixed frequency, carry out performance rating with respective standard.To discharge standard Implementing supervision, often use sample testing inspection system, the blowdown behavior to pollutant discharging unit judges with respective standard.Method, Sample standard is typically by monitoring quality control examination activity supervision and check.
Self-supervision is mainly undertaken by pollutant discharging unit and authorities thereof, and its basic point of departure is mainly " reaching standard gauge provisioning request ". But, on the whole, it is managerial that environmental standard enforcement monitor system should form management through specialized department enforcement self-supervision The operating mechanism of supervision.
Two, the feature of Shanghai pit hole mouth municipal wastewater treatment plant sewage disposal system facility
Pit hole mouth municipal sewage plant, Shanghai is one of existing 54 cities and towns, Shanghai City municipal sewage plant, is also domestically leading Large size city sewage treatment plant.It is through being compared by multi-scheme, sewage disposal selected technology is advanced, automaticity is high, The integrated activated sludge processing technique that convenient operation and management, operating cost are cheap, treatment effect is stable, project occupation of land saves.Pass through Technique over 11 years always debugs, optimize and practice have shown that of production run, the integrated activated sludge processing process system of this factory (unitank technique) has become efficient, economic, a flexible and ripe sewage treatment process.Shanghai pit hole mouth municipal sewage Treatment plant's operational management aspect self-monitoring strength is relatively strong, has the advanced instrument of certain level, equipment, personnel, for a long time, Operation to native system have accumulated great mass of data, data, experience.
Integrated activated sludge processing (unitank) process integration SBR (batch-type processes) method and traditional activated sludge process are (even Afterflow processes) feature, it is another modification and the development of SBR method, has gathered the excellent of SBR and traditional activated sludge process Point, integrated design, not only there is the main feature of SBR system, it is also possible at constant water level as traditional activated sludge process Flow operation the most continuously.
Refer to shown in Fig. 1, for the structural representation in integrated reacting pond in prior art.From the essential structure of this process facility From the point of view of on, integrated reacting pond is divided into the reaction tank of 4 groups of independences, can be with isolated operation.Every component is 3, be mutually juxtaposed, Do not connect mutually;Every is divided into three lattice, constitutes a most basic processing system, and three lattice ponds arrange water inlet, bottom is all arranged Aeration disperser and underwater stirrer, lattice top, both sides arranges that inclined tube, fixed weir effluent trough and bottom arrange that excess sludge is collected Floss hole, every pond sets a residual sludge pump, both sides arrange a scouring electromagnetic valve door and muddy water and Graceful sluice gate.By In being designed with aerating system, there is water inlet in three ponds, timesharing sequence can respectively enter any one pond, continuum micromeehanics in three rectangles; Intermediate pool is as reaction tank, and two ponds in outside are provided with fixing effluent weir and excess sludge discharge mouth, alternately as reaction tank and precipitation Pond, continuous effluent, intermittently spoil disposal;Each pond is run by cycle alternate run mode.
So seeing, as traditional activated sludge process, unitank system is that continuum micromeehanics runs, but the list of unitank Individual pond is by certain periodic duty.Why unitank can run under constant water level continuously, from the point of view of whole system, It has been not belonging to SBR, is closer to traditional activated sludge process.This is the most significant spy of unitank technique Point.
Unitank is alternate run under constant water level, and water outlet uses fixed weir rather than the water decanter of regulation drain height, in office What, always having a pond as sedimentation basin, this sedimentation basin is equivalent to rectangular sedimentation tank, water inlet of last stage aeration shape at a moment The mixed liquor of state enters effluent collection groove, and floods fixed weir, and substantial amounts of activated sludge can precipitate in effluent collection groove and retain, Can not be deposited at the bottom of pond.This is second feature of unitank;
Shi Dongkou sewage treatment plant is belonging to the unitank system of standard, is made up of three square ponds, compensate for single instead Answering the shortcoming that device is thoroughly mixed, this is the 3rd feature of unitank system.
Transport at pipe present situation, and pit hole mouth municipal wastewater treatment plant sewage with sewage disposal (factory) based on above-mentioned domestic and international environmental protection industry (epi) system The feature that reason system facility is unique.The responsibility undertaken for urban wastewater treatment firm and mission, shoulder heavy responsibilities, even for often One built and for any sewage treatment plant of putting into operation, during properly functioning and abnormal running, its process after tail Water is it cannot be guaranteed that the phenomenon of the stably reaching standard of all the period of time continuous 100% is all to exist, and some is the deficiency of operation and management level, some Being the defect of process system self, some is constrained to the internal interference factor of system self.In a word, formally tight in such situation The overall background high, complex management, technology are limited, management and control is strict is big, how to utilize means and the management innovation technology of scientific and technical innovation Improve Sewage Plant fortune pipe level, it is ensured that after sewage treatment plant's purification, outside tail water, arrange 100% rigidity task up to standard, be i.e. that pendulum is whole Sewage disposal or even a professional difficult problem of environmental protection industry.
Summary of the invention
It is an object of the invention to the shortcoming overcoming above-mentioned prior art, it is provided that one disclosure satisfy that emission request, treatment effect Good, operating cost is low, it is more flexible to regulate, control accuracy is high, the accurate control of dependable performance process after the system of sewage discharge And method.
To achieve these goals, the system and method for sewage discharge after the accurate control of the present invention processes has a following composition:
This accurate control process after the system of sewage discharge, it is mainly characterized by, described system include integrated reacting pond, Transmissometer and host computer;Described integrated reacting pond is provided with several muddy water gate and several clear water gate;And it is described muddy Being provided with transmissometer on sluice gate, described transmissometer communicates with described host computer, described host computer and described clear water Gate and described muddy water gate are connected.
Further, described integrated reacting pond includes four groups of reaction tanks, and four groups of described reaction tank independent operatings;Often group Reaction tank is laterally arranged in parallel the unitank subsystem of three standards, and every unitank subsystem Hu Bu UNICOM;unitank Subsystem is longitudinally set side by side with three lattice ponds, and makes one group of reaction tank has nine lattice ponds, nine described lattice ponds It is provided around braiding channel, and the lattice pond, centre one in Article 2 unitank subsystem is not directly joined with described braiding channel Logical;Often group reaction tank is provided with two groups of gates, and often group gate includes a muddy water gate and a clear water gate, described collection Water channel is connected with described clear water gate and described muddy water gate.
Further, it is provided with on the lattice limit of the close described braiding channel in eight lattice ponds of the described direct UNICOM of braiding channel Inclined tube, and eight described lattice ponds are provided with fixed weir effluent trough and excess sludge feeder.
Yet further, the groove edge of described fixed weir effluent trough is zigzag slot edge.
Further, described clear water gate and described muddy water gate are flashboard, described flashboard and described host computer It is connected.
Further, it is provided with aeration disperser and underwater stirrer at the bottom of the pond in described integrated reacting pond.
Further, described host computer includes:
AI module, in order to judge whether the turbidity of the sewage of described transmissometer monitoring meets the requirements;
Instruction module, i.e. closes in order to the unlatching of the muddy water gate described in the judged result control according to AI module and clear water gate;
Alarm module, controls alarm in order to the judged result according to AI module and reports to the police.
The invention still further relates to a kind of method of sewage discharge after accurate control processes, it is mainly characterized by, and described method includes Following steps:
(1) transmissometer described in sends to the most described host computer after obtaining the turbidity of sewage in real time;
(2) whether the turbidity described in host computer judgement described in is less than setting value;
(3) if described turbidity is less than described setting value, then the described muddy water closing gate described in PC control, and Clear water gate opening described in control, then proceedes to step (1);
(4) if described turbidity is opened more than or equal to described setting value, the then described muddy water gate described in PC control Open, and the clear water closing gate described in control, then proceed to step (1).
Have employed the system and method for the sewage discharge after accurate control in this invention processes, compared with prior art, have with Lower advantage:
(1) transmissometer turbidity value on-line checking precision in this sewage disposal system is the highest, and using effect is preferable;
(2) installation also uses the consideration buckling self-locking cleverly, and extremely convenient safeguarded by the assembly of instrument underwater portion;
(3) implanting after automatic control system, the drain time of online accurately automatic tracing locking muddy water and the drain time of clear water are Good separation;Can effectively regulate muddy water strobe emission and the switching of clear water strobe emission, carry for the qualified discharge of tail water after processing For relatively reliable, more accurately, more efficiently control ensure;
(4) improve sewage disposal qualified discharge rate;
And alleviate manpower management cost, improve the actual achievements such as the efficiency of management (5).
Figure explanation
Fig. 1 is the structural representation in integrated reacting pond in prior art.
Fig. 2 is the structural representation of the system of the sewage discharge after the accurate control process of the present invention.
Fig. 3 is the structural representation in the integrated reacting pond of the present invention.
Fig. 4 is the structural representation of a reaction tank of the present invention.
Fig. 5 is the reaction tank position view with braiding channel of the present invention.
Fig. 6 is the structural representation of the gate of the present invention.
Fig. 7 a is the reaction tank of present invention view before quiescent setting.
Fig. 7 b is the water (flow) direction schematic diagram of the reaction tank of the present invention.
Fig. 8 is the structural representation on the groove edge of the fixed weir effluent trough of the present invention.
Detailed description of the invention
In order to more clearly describe the technology contents of the present invention, conduct further description below in conjunction with specific embodiment.
Refer to shown in Fig. 2 to Fig. 3, one in the system of the sewage discharge after wherein Fig. 2 is the accurate control process of the present invention Changing the structural representation of reaction tank, Fig. 3 is the structural representation in the integrated reacting pond of the present invention.Described system includes one Change reaction tank, transmissometer and host computer;Described integrated reacting pond is provided with several muddy water gate and several clear water gate; And be provided with transmissometer on described muddy water gate, described transmissometer communicates with described host computer, described host computer with Described clear water gate and described muddy water gate are connected.Described integrated reacting pond includes four groups of reaction tanks, and described Four groups of reaction tank independent operatings;Group reaction tank is often laterally arranged in parallel the unitank subsystem of three standards, and every Unitank subsystem Hu Bu UNICOM;Unitank subsystem is longitudinally set side by side with three lattice ponds, and makes tool in one group of reaction tank Have nine lattice ponds, nine described lattice ponds be provided around braiding channel JSQ, and make in Article 2 unitank subsystem Between a lattice pond not with the described direct UNICOM of braiding channel JSQ;Often group reaction tank is provided with two groups of gates, and often group gate includes One muddy water gate and a clear water gate, described braiding channel JSQ is connected with described clear water gate and described muddy water gate Connect.Wherein, arrange with on the lattice limit of the close described braiding channel JSQ in eight lattice ponds of the described direct UNICOM of braiding channel JSQ Have in inclined tube, and eight described lattice ponds and be provided with fixed weir effluent trough and excess sludge feeder.Described fixed weir effluent trough Groove along be zigzag slot edge, referring specifically to shown in accompanying drawing 8.Described clear water gate and described muddy water gate are flashboard, Described flashboard is connected with described host computer, is provided with aeration disperser and water at the bottom of the pond in described integrated reacting pond Lower agitator.
In first specific embodiment of the present invention, the integrated reacting pond of the present invention mainly include 8 set mud transmissometers, 8 Guard box, 8 set guard box supports, 8 set sensor stands, 1000 meters of signal cables, 1000 meters of feed cables, 8 set signals Lightning protection device, used 8 muddy water strobe emissions, 8 clear water strobe emissions, the original cyclelogs of attached host computer load The additional priority controlled condition system of the compositions such as relative program and editor's monitoring interface.The present invention is by on-line checking draining Turbidity value follows the trail of the limit value up to standard of tail water after processing with accurate lock, when accurately determining the discharge of the drain time of muddy water and clear water Between optimal separation;More effectively regulation muddy water strobe emission and the switching of clear water strobe emission, for the row up to standard of tail water after processing The control that putting provides relatively reliable ensures, improves sewage disposal emission index, and alleviates manpower management cost, improves the efficiency of management Etc. actual achievement.
Hardware components in the present invention specifically includes that transmissometer includes transmissometer body (probe, transmitter and probe bracket), instrument Table case and instrument box support and cable (signal cable and feed cable).Complete the laying of signal cable, feed cable, from each son Control station is routed to transmissometer installation site and completes wiring;Complete the fixing work of scene protection case and sensor stand.Please join Read shown in table 1, for the bill of materials required for the system of the sewage discharge after the accurate control process of the present invention.
The quantities bill of materials needed for table 1. Project-developing
Described host computer includes:
AI module, in order to judge whether the turbidity of the sewage of described transmissometer monitoring meets the requirements;
Instruction module, i.e. closes in order to the unlatching of the muddy water gate described in the judged result control according to AI module and clear water gate;
Alarm module, controls alarm in order to the judged result according to AI module and reports to the police.
Wherein, software section in the present invention: revise existing PLC station program and realize turbidity data warning and control audible-visual annunciator etc. Function.
(1) newly-increased signaling point record turbidity data;
(2) newly-increased data converter section, calculates corresponding turbidity value;
(3) newly-increased controlling alarm program;
(4) newly-increased audible-visual annunciator controls program segment.
In order to more clearly describe first specific embodiment of the present invention, in conjunction with after pit hole mouth municipal sewage plant, Shanghai one Changing reaction tank unitank subsystem, refer to shown in Fig. 3, integrated reacting pond is divided into 4 groups, independent operating, and every component is 3 Bar, is mutually juxtaposed, does not connects mutually;Every is divided into 3 lattice, the standard unitank subsystem of pond 1# totally three horizontal parallel connections, adopts With bottom water distribution cylinder (DN1000 pipeline).Single lattice pond dischargeable capacity is 7350m3(long 35m × wide 35m × high 6m), often Group dischargeable capacity is 66150m3(7350m×3m×3m);Three lattice ponds arrange water inlet, bottom and all arrange aeration diffusion dress Putting and underwater stirrer, lattice top, both sides arranges that inclined tube, fixed weir effluent trough and bottom arrange that excess sludge collects floss hole, often Pond sets residual sludge pump, both sides and respectively arranges a scouring electromagnetic valve door, muddy water gate and clear water gate.Often group have 2 muddy Sluice gate and 2 clear water gates, add up to 8 muddy water gates, and 8 clear water gates.It is respectively mounted 8 at 8 muddy water gates Individual transmissometer on-line checking muddy water turbidity;Pond 1-1 to pond 1-6 all can discharge muddy water and clear water, and pond 1-1 is public same to pond 1-3 Individual water outlet channel, the public same water outlet channel of pond 1-4 to pond 1-6, the public same muddy water gate of pond 1-1 to pond 1-3 1., 3., 2., pond 1-4 is to pond for the public same clear water gate of pond 1-1 to pond 1-3 for the public same muddy water gate of pond 1-4 to pond 1-6 The public same clear water gate of 1-6 4., 2 public channels altogether, 2 muddy water gates, 2 and clear water gate.Both sides replace Water, cycle operation.2. 1. the muddy water gate on the left side form 1 group with clear water gate, and the muddy water gate on the right is 3. with clear water gate 4. Form 1 group, often group muddy water gate and the also alternate run draining of clear water gate.In each drainage period, the draining of muddy water gate elder generation, It is back to water inlet system, is automatically switched off after muddy water discharge reaches Effluent criteria, change into arranging outside clear water gate opening, mutually switch Water outlet.The equipment of two gates is rectangle flashboard, realizes the switch headstock gear of ditch water flow on-off function by the up and down motion of flashboard, As shown in Figure 6.
Within the pond 1# cycle of operation, during sewage biochemical reaction in the left side longitudinally 3 ponds, i.e. pond 1-1 to pond 1-3, it is quiet Only as shown in Figure 7a, fixed weir effluent trough is immersed in sewage the state before precipitation, there is a large amount of activity in excess sludge feeder Mud, quiet heavy after need to be completely exhausted out within the muddy water gate 1. opening time, be back to inhalant region, be then then turned on clear water discharge Gate is 2. outer clears water.The structural shape of the fixed weir of fixed weir effluent trough as shown in Figure 8, is acted on by upper up-flow, and clear water is certainly Lower and upper stratification plug-flow, index position in fixed weir effluent trough entrance feeder is such as Fig. 3, its hydraulic regime is as shown in Figure 7b.
Longitudinally 3 ponds, the 1# left side, pond, i.e. pond 1-1 is to pond 1-3, and after completing quiescent setting, originally muddy water enters respective pond Fixed weir effluent trough in, as Fig. 5 illustrates the detailed placement in 1 pond, a pond is subdivided into 9 little lattice, as 1-1-1g~1-1-9g, these 9 little lattice only have 1-1-5g not as fixed weir effluent trough, and other 8 little lattice are all disposed with fixed weir Effluent trough.Originally muddy water after collecting mud such as Fig. 4 is flowed into by the normally opened apopore in this pond and catchments in channel, and the left side is additionally Originally the muddy water in two ponds synchronizes to be entered in public collection channel by normally opened apopore the most respectively.Now 1. muddy water gate is opened Carry out muddy water to be emitted into HSSJ system (muddy water collection system, this system is by muddy water regulating gate by the muddy water that originally discharges After unlatching, this batch muddy water is guided to muddy water and props up in channel, enter muddy water pump house, then be promoted to canal for water distribution through muddy water pump, Before being finally back to former trash rack well), according to completing set time discharge muddy water in the muddy water drain time set;Regularly muddy water After discharge terminates, close muddy water strobe emission 1., open simultaneously and drain into QSWP system (clear water outside clear water strobe emission 2. clear water Discharging system, this system be by purified treatment after water outlet up to standard by clear water regulating gate open after, by this batch clear water water conservancy diversion Prop up channel to clear water, then import in clear water water distribution main channel, sterile-processed after, then through water outlet elevator pump/high position well, Realize clear water eventually and be emitted into surface water body).
Outlet canal (often group two) in four groups of integrated reacting ponds installs transmissometer, and signal is delivered to corresponding host computer respectively. Reported to the police according to alarming value, the cycle of operation of reaction tank and the turbidity on-line detection value preset by host computer.
Reporting to the police reminds patrol officer on duty to take appropriate measures at reaction tank center blockhouse by the way of sound and light alarm;The most turbid Degree on-line measurement value and warning show in existing Monitor Computer Control System;At present through practice, have been realized in program control System and the linkage in equipment execution state.
Biological reaction pool is as important process processing unit in sewage disposal process, for using unitank to process the Shanghai stone of technique Seeming even more important for the municipal sewage plant of hole, the ruuning situation of reaction tank directly influences final effluent quality.For The ruuning situation of reaction tank can be grasped more timely, it is ensured that processing procedure can reach predetermined process requirement, therefore anti-at biochemistry Answer installation transmissometer at each outlet canal muddy water gate of pond.By transmissometer, water outlet is carried out real-time detection, in order to occur in data Can notify time abnormal that transporting pipe personnel takes corresponding treatment measures in time, has the online transmissometer in 1 group of pond to examine in real time at present in time Survey data, already loaded in the cycle of operation, achieve turbidity on-line detection dominant instruction COD in the method for operationcrLinkage control System.
Turbidity one word, measures with a kind of referred to as turbidimetric instrument.Nephelometer emits beam, and is passed through one section of sample, And detection has how much light to be scattered by the particulate matter in water from the direction with incident light being 90 °.This scattered light measuring method claims Make scattering method.Thinking in science that any real turbidity all must be measured in such a way, nephelometer is not only suitable for field and experiment Indoor measurement, is also applied for round-the-clock continuous monitoring, can arrange nephelometer, is allowed at surveyed turbidity value beyond safety post Send alarm on time.
The research and development of system of sewage discharge after the accurate control of the present invention processes are exactly based on this that utilize transmissometer on-line checking Functional characteristic, after the process of on-line checking biochemical reaction tank, turbidity value in outer last person's water, indicates the COD in tail water with thiscrIndex The high low value of project, tail water, when different turbidity situations, takes its representative different turbidity water samples, this each batch Water sample measures its turbidity value and COD in laboratory respectively by the water analysis method of national regulationcrValue, and CODcrDirty just Water treatment system judges the important conventional index that sewage disposal degree is the most up to standard.By laboratory to batch water sample CODcrMeasurement result carry out correlation analysis with corresponding turbidity value, by COD in tail watercrTwo factors with turbidity The quantization correlation analysis of index, thus weigh the related intimate degree of two Variable Factors.
Analyzed by above correlation principle, draw CODcrWith turbidity the two Variable Factors correlation curve, such as Shanghai pit hole mouth Current COD in the outer last person's water of municipal sewage plant's biochemical reaction tankcrIndex internal control is 40mg/L, at the Variable Factors drawn Turbidity corresponding in correlogram is 17 (NTU), then during detected value >=17 constantly (NTU) of online transmissometer, the most dominant Instruction COD nowcrBeyond internal control limit value 40mg/L, it is unsatisfactory for arranging as outside clear water;Whereas if online transmissometer time Time detected value < 17 (NTU) time, the most dominant instruction COD nowcrLess than internal control limit value 40mg/L, meet our factory's design discharge One-level B class standard in standard GB18918-2002 (urban wastewater treatment firm sewage drainage standard), meets the internal control of our factory simultaneously Standard value, meets outer row's requirement.
As a example by the left-most cell i.e. pond 1-1 to pond 1-3 of pond 1#, muddy water strobe emission 1. with clear water strobe emission 2. online turbidity Logic control contact between instrument 1YB1 is as follows;
(1), when integrated reacting pond is properly functioning, it it is the process operation cycle according to itself, it then follows self technology controlling and process main program Run;
(2) in a complete process cycle, when muddy water gate opening after, the on-line checking value of transmissometer participates in journey Sequence condition controls;Now, transmissometer on-line checking turbidity value data-signal feeds back to the AI module of PLC, AI module reception value Comparing is carried out with the setting value in AI module;
(3) if the turbidity value of on-line checking is less than the preset value in module, the detection numeric feedback of instrument to PLC Cyclelog, instruction is exported to instruction module by PLC program controller, and the instruction execution signals that instruction module sends is by logical News module gives muddy water strobe emission and clear water strobe emission, it is desirable to muddy water closing gate, no longer carries out muddy water backflow, the most clear Sluice gate is opened, and clears water outside starting.
(4) when transmissometer on-line checking data are equal to or more than preset value, the detection numeric feedback of instrument is to PLC journey Sequence controller, instruction is exported to instruction module by PLC program controller, and the instruction execution signals that instruction module sends passes through communication Module gives muddy water strobe emission and clear water strobe emission, it is desirable to muddy water gate opening, and muddy water is back to water inlet system, the most clear Sluice gate cuts out, it is ensured that the accurate control that outer last person's water is up to standard.
The muddy water strobe emission of the right cell i.e. pond 1-4 to pond 1-6 of its this pond 1# 3. with clear water strobe emission 4. online transmissometer Logical communication link between 1YB2 is just the same with the left side;The linkage process that 2# pond, 3# pond, the control thought in 4# pond control with equipment With 1# pond.
Therefore, the method for the sewage discharge after the accurate control of the present invention processes comprises the following steps:
(1) transmissometer described in sends to the most described host computer after obtaining the turbidity of sewage in real time;
(2) whether the turbidity described in host computer judgement described in is less than setting value;
(3) if described turbidity is less than described setting value, then the described muddy water closing gate described in PC control, and Clear water gate opening described in control, then proceedes to step (1);
(4) if described turbidity is opened more than or equal to described setting value, the then described muddy water gate described in PC control Open, and the clear water closing gate described in control, then proceed to step (1).
It addition, the setting value in AI module, it is the turbidity value by the batch water yield and a large amount of water analyses that laboratory is carried out CODcrAs a result, the Dominant Data drawn by the correlation analysis of data.
Have employed the system and method for the sewage discharge after accurate control in this invention processes, compared with prior art, have with Lower advantage:
(1) transmissometer turbidity value on-line checking precision in this sewage disposal system is the highest, and using effect is preferable;
(2) installation also uses the consideration buckling self-locking cleverly, and extremely convenient safeguarded by the assembly of instrument underwater portion;
(3) implanting after automatic control system, the drain time of online accurately automatic tracing locking muddy water and the drain time of clear water are Good separation;Can effectively regulate muddy water strobe emission and the switching of clear water strobe emission, carry for the qualified discharge of tail water after processing For relatively reliable, more accurately, more efficiently control ensure;
(4) improve sewage disposal qualified discharge rate;
And alleviate manpower management cost, improve the actual achievements such as the efficiency of management (5).
The present invention achieves the controlled plant muddy water of drainage pattern, clear water gate in the cycle of operation in whole integrated reacting pond Switch under the mode following main program, the alarm limits set with the on-line checking value of transmissometer carries out linear quadratic control linkage.
Meet after realizing muddy water emission compliance and closed by muddy water strobe emission when arranging index outside clear water, automatically switch to clear water gate and go out Water, reasonably controls the shortest muddy water drain time, improves drain time and the discharge capacity of clear water.
Give the relatively reliable guarantee that after processing, tail water entirety emission compliance provides to the full extent, save the cost of manpower management, Eliminate the present situation relying on the low reliability switching gate manually, improve the efficiency of stable operation, improve the one-tenth of management Effect, provides more solid technical conditions measure for production continuous, stable, safe, up to standard.
To each side such as the theoretical research of this technology from now on, engineering design, control method, operational managements, represent domestic The newest fruits in this field and engineering experience, existing higher theory value, there is again great practical value.
Running the sewage treatment plant of other forms also has higher guidance to look like, even to whole sewage treatment industry and from now on The Integrated design of sewage treatment project, operation management suffer from high reference.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that still may be made that various Amendment and conversion are without departing from the spirit and scope of the present invention.Therefore, specification and figure are considered as illustrative and unrestricted Property.

Claims (8)

1. the system of the sewage discharge after an accurate control processes, it is characterised in that described system include integrated reacting pond, Transmissometer and host computer;Described integrated reacting pond is provided with several muddy water gate and several clear water gate;And it is described muddy Being provided with transmissometer on sluice gate, described transmissometer communicates with described host computer, described host computer and described clear water Gate and described muddy water gate are connected, and described integrated reacting pond includes four groups of reaction tanks, and four groups of described reactions Pond independent operating;Group reaction tank is often laterally arranged in parallel the unitank subsystem of three standards, and every unitank subsystem Tong Hubu UNICOM;Unitank subsystem is longitudinally set side by side with three lattice ponds, and makes one group of reaction tank has nine lattice ponds, Nine described lattice ponds be provided around braiding channel, and make the lattice pond, centre one in Article 2 unitank subsystem not with institute The direct UNICOM of braiding channel stated.
The system of the sewage discharge after accurate control the most according to claim 1 process, it is characterised in that often organize reaction tank Being provided with two groups of gates, and often group gate includes a muddy water gate and a clear water gate, described braiding channel is clear with described Sluice gate is connected with described muddy water gate.
The system of the sewage discharge after accurate control the most according to claim 2 process, it is characterised in that with described collection It is provided with on the lattice limit of the close described braiding channel in eight lattice ponds of the direct UNICOM of water channel in inclined tube, and eight described lattice ponds and sets It is equipped with fixed weir effluent trough and excess sludge feeder.
The system of the sewage discharge after accurate control the most according to claim 3 process, it is characterised in that described is fixing The groove edge of weir effluent trough is zigzag slot edge.
The system of the sewage discharge after accurate control the most according to claim 2 process, it is characterised in that described clear water Gate and described muddy water gate are flashboard, and described flashboard is connected with described host computer.
The system of the sewage discharge after accurate control the most according to claim 1 process, it is characterised in that described one Change and be provided with aeration disperser and underwater stirrer at the bottom of the pond of reaction tank.
The system of the sewage discharge after accurate control the most according to claim 1 process, it is characterised in that described is upper Machine includes:
AI module, in order to judge whether the turbidity of the sewage of described transmissometer monitoring meets the requirements;
Instruction module, i.e. closes in order to the unlatching of the muddy water gate described in the judged result control according to AI module and clear water gate;
Alarm module, controls alarm in order to the judged result according to AI module and reports to the police.
8. the method realizing the sewage discharge after accurate control processes based on the system according to any one of claim 1 to 7, It is characterized in that, described method comprises the following steps:
(1) transmissometer described in sends to the most described host computer after obtaining the turbidity of sewage in real time;
(2) whether the turbidity described in host computer judgement described in is less than setting value;
(3) if described turbidity is less than described setting value, then the described muddy water closing gate described in PC control, and Clear water gate opening described in control, then proceedes to step (1);
(4) if described turbidity is opened more than or equal to described setting value, the then described muddy water gate described in PC control Open, and the clear water closing gate described in control, then proceed to step (1).
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