CN104649404A - System and method for accurately controlling discharge of treated sewage - Google Patents
System and method for accurately controlling discharge of treated sewage Download PDFInfo
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- CN104649404A CN104649404A CN201510095039.0A CN201510095039A CN104649404A CN 104649404 A CN104649404 A CN 104649404A CN 201510095039 A CN201510095039 A CN 201510095039A CN 104649404 A CN104649404 A CN 104649404A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
- C02F2209/008—Processes using a programmable logic controller [PLC] comprising telecommunication features, e.g. modems or antennas
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
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- Hydrology & Water Resources (AREA)
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- Automation & Control Theory (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention relates to a system for accurately controlling discharge of treated sewage. The system comprises an integrated reaction tank, turbidity meters and an upper computer, wherein the integrated reaction tank is provided with a plurality of turbid water gates and clear water gates; the turbidity meters are arranged on the turbid water gates, and communicated with the upper computer; and the upper computer is connected with the clear water gates and the turbid water gates. The invention further relates to a method for accurately controlling the discharge of the treated sewage. With the adoption of the system and the method for accurately controlling the discharge of the treated sewage, the precision of on-line detection is improved; the discharge rate of sewage treatment reaching the standard is increased; the manpower management cost is reduced; the actual performances such as the management efficiency are improved; the discharge requirement is met; the treatment effect is good; the operating cost is low; the adjustment is more flexible; the control precision is high; the performance is reliable; and the application range is wide.
Description
Technical field
The present invention relates to Mechanical course field, particularly relate to sewage disposal, specifically refer to the system and method for the sewage discharge after a kind of accurate control treatment.
Background technology
One, pipe present situation is transported in environmental protection industry (epi) system and sewage disposal (factory) both at home and abroad
Current generation; along with the development of human society; the continuous expansion of city size; the water consumption in city and water displacement are all in continuous increase; exacerbate with the anxiety of water and the pollution of water quality; environmental problem becomes increasingly conspicuous, and the water crisis caused thus and environmental ecology are polluted, the environment protection treating facilities management important restriction factor having become socio-economic development out of control.
At present, one of environment protection fundamental state policy being established as China, present flourish gesture in recent years, and many focus and emphasis fields numerous domestic scholar especially of Environmental Science and Engineering, the object that scientific research personnel and engineering technical personnel pay close attention to, wastewater treatment in China cause also achieves during the last ten years in nearly two of reform and opening-up and develops rapidly, by the unremitting effort of environmental worker, the new technology of many sewage disposal aspects, novel process, new installation, novel material obtains application in China, wherein in sewage treatment technology, " activated sludge process " technological development is rapid, become the leading technique of wastewater treatment in China in recent years, achieve many achievements in research and abundant engineer applied and operational management experience.
But due to technology, economical, the restriction of management condition, much sewage all fails to accomplish the qualified discharge of 100%, along with the pollution of water surrounding is on the rise, country " 12 " period, State Council has issued three files continuously, " State Council is about strengthen environmental protection major tasks suggestion (No. [2011] 35, promulgated by the State Council) ", " State Council is about the notice (No. [2011] 42, promulgated by the State Council) printed and distributed national environmental protection " 12 " and plan, " State Council is about the notice causing the comprehensive programme of work of " 12 " energy-saving and emission-reduction, be based upon and thoroughly apply the Scientific Outlook on Development, improve conservation culture, comprehensive raising environment protection Supervision Management Level, strengthen principal pollutant total amount to reduce discharging, upgrading is carried out to existing sewage work, the supervision of strengthening facility operation, dispose environmental pollution and ecological damage event in accordance with the law, the integrated pollution control of in-depth major fields, implement waterhead area environmental renovation, recover and construction project, to increase water quality compliance rate, planning notice (No. [2011] 42, promulgated by the State Council) major objective requires that the construction of town environment Infrastructure and operation level get a promotion, and water quality increases substantially, and puts forth effort to cut down chemical oxygen demand (COD) (COD
cr) and ammonia nitrogen quantity discharged.Promote urban wastewater treatment level, to the end of the year 2015, realize newly-increased sewage daily handling ability forty-two million ton, sewage treatment facility rate of load condensate will bring up to more than 80%, and treatment rate of domestic sewage reaches 85%.Strengthen sewage treatment facility to run and pollutant fluxes evaluation, advance the construction of municipal sewage plant's monitor supervision platform.Department's Coordinate development environment protection, house town and country construction department will strengthen construction and the operation management of town and country wastewater treatment facility; In the notice of energy conservation scheme, require the sewage treatment facility construction suiting measures to local conditions to advance low cost, easy care, strengthening energy-saving and emission-reduction supervision and check are accelerated to formulate urban drainage and sewage disposal regulations, strengthen major polluting sources and treatment facility operation supervision, the state key environmental monitoring enterprise list that in good time issue principal pollutant exceed standard serious, strengthen the construction of municipal sewage plant's monitor supervision platform, 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.
Separately in the current up-to-date the Law on Environmental Protection of the People's Republic of China implemented, play the most forte of history about the regulation to blowdown enterprise and pollution treatment enterprise such as the requirement of general provisions, restricted mechanism, protection and environmental protect, preventing pollution and other public hazards, information disclosure and public participation, legal obligation etc.
In view of the above, China in the urgent need to a collection ofly emission request can be met, treatment effect is good, working cost is low, regulate more flexibly, control accuracy is high, the New Technology about Wastewater Treatment of dependable performance and novel process, and be better convenient to the innovation that operational management controls and assist new technology.
From actually operating; country is in order to prevent and treat environmental pollution; maintaining ecological balance; protection population health; to needing unified every technical specifications and technical requirements to make a series of regulation and standard in environmental work, having the binding character of regulation, is that Law on Environmental Protection is given; from the Historic Evolution of a series of environmental standard work so far, the thought of " exceeding standard namely illegal " is established.In the enforcement monitor mode of environmental standard, the supervision of standard implementation can be divided into self-supervision and supervision.
Managerial supervision is responsible for primarily of environmental protection administrative responsibile institution at different levels, embodies the supervision to standard implementation and inspection.Its basic point of departure be " up to standard ", the means of employing be generally supervision property detect and check, selective examination.The enforcement of ambient quality standard is supervised, is generally the routine monitor of fixed sample point position, fixed frequency, carries out grade estimation with respective standard.The enforcement of emission standard is supervised, often adopts sample testing inspection system, the blowdown behavior of pollutant discharging unit is judged with respective standard.Method, sample standard generally control examination activity supervision and check by monitoring quality.
Self-supervision is born primarily of pollutant discharging unit and competent authorities thereof, and its basic point of departure mainly " reaches standard gauge provisioning request ".But, on the whole,---the operating mechanism of enforcement---self-supervision---managerial supervision that environmental standard is implemented monitor system and should be formed management through specialized department.
Two, the feature of Shanghai pit hole mouth municipal wastewater treatment plant Sewage treatment systems 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 work.Be through and compared by multi-scheme, sewage disposal selected technology advanced person, the integrated activated sludge processing technique that level of automation is high, convenient operation and management, running cost are cheap, treatment effect is stablized, project occupation of land is economized.Always debug through the technique over 11 years, to optimize and the practice of production run shows, the integrated activated sludge processing process system (unitank technique) of this factory has become efficient, economic, a flexible and ripe sewage treatment process.Operational management aspect self-monitoring strength in pit hole mouth municipal sewage plant, Shanghai is comparatively strong, has the advanced instrument of certain level, equipment, personnel, for a long time, have accumulated great mass of data, data, experience to the operation of native system.
SBR (the sequence batch (process of integrated activated sludge processing (unitank) process integration,) feature of method and traditional activated sludge process (Continuous Flow process), it is another modification and the development of SBR method, gather the advantage of SBR and traditional activated sludge process, integrated design, not only there is the principal feature of SBR system, can also Continuous Flow operation under constant water level as traditional activated sludge process.
Referring to shown in Fig. 1, is the structural representation in integrated reacting pond in prior art.From the essential structure of this process facility, integrated reacting pond is divided into 4 groups of independently reaction tanks, can isolated operation.Every component is 3, mutually side by side, is not communicated with mutually; Every bar is divided into three lattice, form a treatment system the most basic, three lattice ponds arrange water-in, bottom and all arrange aeration dispersion device and underwater stirrer, inclined tube is arranged on lattice top, both sides, fixed weir effluent trough and bottom arrange that excess sludge collects discharge outlet, and a residual sludge pump is established in every pond, both sides arrange a scouring electromagnetic valve door and muddy water and Graceful sluice gate.Owing to being all provided with aerating system, there is water-in in three ponds, point sequential can enter any pond in three rectangles respectively, continuum micromeehanics; 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 settling tank, and continuous effluent, interval spoil disposal; Each pond is run by cycle alternate run mode.
See like this, the same with traditional activated sludge process, unitank system is that continuum micromeehanics runs, but the single pond of unitank is by certain periodic duty.Why unitank can run continuously under constant water level, and from whole system, it does not belong to SBR, more close to traditional activated sludge process.This is the most significant feature of unitank technique.
Unitank is alternate run under constant water level, water outlet adopts fixed weir, instead of regulate the water decanter of drain height, at any a moment, always have a pond as settling tank, this settling tank is equivalent to rectangular sedimentation tank, the mixed solution of last stage water inlet aeration state enters effluent collection groove, and flooding fixed weir, a large amount of active sludge can precipitate and retain in effluent collection groove, can not be deposited at the bottom of pond.This is second feature of unitank;
Shi Dongkou sewage treatment plant is the unitank system belonging to standard, is made up of, compensate for the shortcoming that single reactor mixes completely three square ponds, and this is the 3rd feature of unitank system.
Pipe present situation is transported based on above-mentioned domestic and international environmental protection industry (epi) system and sewage disposal (factory), and the feature of pit hole mouth municipal wastewater treatment plant Sewage treatment systems facility uniqueness.The responsibility that urban wastewater treatment firm is undertaken and mission, shoulder heavy responsibilities, even each to be built and for any sewage work of putting into operation, when normal operation and abnormal running, after its process, tail water can not ensure that the phenomenon of the stably reaching standard of all the period of time continuous 100% all exists, some is the deficiency of operation and management level, and some is the defect of process system self, and some is the internal interference factor being limited to system self.In a word, formally the situation is tense like this, the strict overall background of complex management, Technology Restriction, management and control is large, the means of scientific and technical innovation and management innovation technology is how utilized to improve Sewage Plant fortune pipe level, after guaranteeing sewage work's purification, tail water arranges 100% rigidity task up to standard outward, is namely a professional difficult problem of putting in whole sewage disposal and even environmental protection industry.
Summary of the invention
The object of the invention is the shortcoming overcoming above-mentioned prior art, provide a kind ofly can meet emission request, treatment effect is good, working cost is low, regulate more flexibly, control accuracy is high, the system and method for sewage discharge after the accurate control treatment of dependable performance.
To achieve these goals, the system and method for the sewage discharge after accurate control treatment of the present invention has following formation:
The system of the sewage discharge after this accurate control treatment, its principal feature is, described system comprises integrated reacting pond, turbidimeter and upper computer; Described integrated reacting pond is provided with several muddy water gate and several clear water gate; And described muddy water gate is provided with turbidimeter, described turbidimeter and described upper computer communicate, and described upper computer is connected with described clear water gate and described muddy water gate.
Further, described integrated reacting pond comprises four group reaction ponds, and four described group reaction pond independent operatings; The unitank subsystem of three standards is laterally arranged in parallel in every group reaction pond, and every bar unitank subsystem Hu Bu UNICOM; Longitudinally three lattice ponds are set side by side with in unitank subsystem, and make, in a group reaction pond, there are nine lattice ponds, the surrounding in nine described lattice ponds is provided with braiding channel, and makes not direct with the described braiding channel UNICOM in the lattice pond, centre one in Article 2 unitank subsystem; Every group reaction pond is provided with two groups of gates, and often group gate comprises a muddy water gate and a clear water gate, and described braiding channel is connected with described muddy water gate with described clear water gate.
Further, be provided with inclined tube with on the lattice limit of the close described braiding channel in eight lattice ponds of the direct UNICOM of described braiding channel, and be provided with fixed weir effluent trough and excess sludge receiving tank in eight described lattice ponds.
Again 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, and described flashboard is connected with described upper computer.
Further, aeration dispersion device and underwater stirrer is provided with at the bottom of the pond in described integrated reacting pond.
Further, described upper computer comprises:
AI module, whether the turbidity in order to the sewage judging described turbidimeter monitoring meets the requirements;
Instruction module, namely the unlatching in order to the muddy water gate according to the judged result control of AI module and clear water gate closes;
Alarm module, reports to the police in order to control warning howler according to the judged result of AI module.
The invention still further relates to the method for the sewage discharge after a kind of accurate control treatment, its principal feature is, described method comprises the following steps:
(1) described upper computer is sent to after the turbidity of the turbidimeter Real-time Obtaining sewage described in;
(2) whether the turbidity described in the upper computer described in judges is less than set(ting)value;
(3) if described turbidity is less than described set(ting)value, then the described muddy water closing gate described in PC control, and the clear water gate opening described in controlling, then continue step (1);
(4) if described turbidity is more than or equal to described set(ting)value, then the described muddy water gate opening described in PC control, and the clear water closing gate described in controlling, then continue step (1).
Have employed the system and method for the sewage discharge after the accurate control treatment in this invention, compared with prior art, have the following advantages:
(1) the turbidity value on-line checkingi precision of turbidimeter in this Sewage treatment systems is very high, and result of use is better;
(2) installation aspect also uses the consideration buckling self-locking cleverly, and the assembly maintenance of instrument underwater portion is very convenient;
(3) after implanting automatic control system, the online drain time of accurately automatic tracing locking muddy water and the best dividing point of drain time of clear water; Effectively can regulate the switching of muddy water strobe emission and clear water strobe emission, for the qualified discharge processing rear tail water provides more reliably, controls more accurately, more efficiently to ensure;
(4) improve sewage disposal qualified discharge rate;
And alleviate manpower handling 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 sewage discharge after accurate control treatment of the present invention.
Fig. 3 is the structural representation in 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 position view of a reaction tank of the present invention and braiding channel.
Fig. 6 is the structural representation of gate of the present invention.
Fig. 7 a is the view of reaction tank of the present invention before quiescent setting.
Fig. 7 b is the water (flow) direction schematic diagram of reaction tank of the present invention.
Fig. 8 is the structural representation on the groove edge of fixed weir effluent trough of the present invention.
Embodiment
In order to more clearly describe technology contents of the present invention, conduct further description below in conjunction with specific embodiment.
Refer to shown in Fig. 2 to Fig. 3, wherein Fig. 2 is the structural representation in integrated reacting pond in the system of sewage discharge after accurate control treatment of the present invention, and Fig. 3 is the structural representation in integrated reacting pond of the present invention.Described system comprises integrated reacting pond, turbidimeter and upper computer; Described integrated reacting pond is provided with several muddy water gate and several clear water gate; And described muddy water gate is provided with turbidimeter, described turbidimeter and described upper computer communicate, and described upper computer is connected with described clear water gate and described muddy water gate.Described integrated reacting pond comprises four group reaction ponds, and four described group reaction pond independent operatings; The unitank subsystem of three standards is laterally arranged in parallel in every group reaction pond, and every bar unitank subsystem Hu Bu UNICOM; Longitudinally three lattice ponds are set side by side with in unitank subsystem, and make, in a group reaction pond, there are nine lattice ponds, the surrounding in nine described lattice ponds is provided with braiding channel JSQ, and make the lattice pond, centre one in Article 2 unitank subsystem not with the described direct UNICOM of braiding channel JSQ; Every group reaction pond is provided with two groups of gates, and often group gate comprises a muddy water gate and a clear water gate, and described braiding channel JSQ is connected with described muddy water gate with described clear water gate.Wherein, be provided with inclined tube 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, and be provided with fixed weir effluent trough and excess sludge receiving tank in eight described lattice ponds.The groove edge of described fixed weir effluent trough is zigzag slot edge, specifically see shown in accompanying drawing 8.Described clear water gate and described muddy water gate are flashboard, and described flashboard is connected with described upper computer, are provided with aeration dispersion device and underwater stirrer at the bottom of the pond in described integrated reacting pond.
In the first specific embodiment of the present invention; integrated reacting pond of the present invention mainly comprises 8 cover mud turbidimeters, 8 guard boxs, 8 cover guard box supports, 8 overlap sensor stands, 1000 meters of signal cables, 1000 meters of feed cables, 8 cover siganl thunder-proof devices, and used 8 muddy water strobe emissions, 8 clear water strobe emissions, the original sequence controllers of attached upper computer load dependent programs and edit the additional priority controlled condition system of the compositions such as monitoring interfaces.The present invention by the turbidity value in on-line checkingi draining follow the trail of with accurate lock process after the limit value up to standard of tail water, accurately determine the drain time of muddy water and the best dividing point of drain time of clear water; The switching of more effective adjustment muddy water strobe emission and clear water strobe emission, controls more reliably to ensure for the qualified discharge processing rear tail water provides, improves sewage disposal ER for emission rate, and alleviates the actual achievement such as manpower management cost, the raising efficiency of management.
Hardware components in the present invention mainly comprises: turbidimeter comprises turbidimeter body (probe, transmitter and probe bracket), instrument box and instrument box support and cable (signal cable and feed cable).The laying of settling signal cable, feed cable, is routed to turbidimeter installation site from each sub-control station and completes wiring; Complete the steady job of scene protection case and sensor stand.Referring to shown in table 1, is the material list required for the system of the sewage discharge after accurate control treatment of the present invention.
Quantities material list needed for table 1. Project-developing
Described upper computer comprises:
AI module, whether the turbidity in order to the sewage judging described turbidimeter monitoring meets the requirements;
Instruction module, namely the unlatching in order to the muddy water gate according to the judged result control of AI module and clear water gate closes;
Alarm module, reports to the police in order to control warning howler according to the judged result of AI module.
Wherein, software section in the present invention: revise existing PLC program of standing and realize turbidity data warning and control the functions such as combined aural and visual alarm.
(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 combined aural and visual alarm sequence of control section.
In order to the first specific embodiment of the present invention of description clearly, in conjunction with rear pit hole mouth municipal sewage plant, Shanghai integrated reacting pond unitank subsystem, refer to shown in Fig. 3, integrated reacting pond is divided into 4 groups, independent operating, every component is 3, mutually side by side, is not communicated with mutually; Every bar is divided into 3 lattice, and pond 1# is totally three horizontal standard unitank subsystems in parallel, adopts bottom water distribution cylinder (DN1000 pipeline).Single lattice pond useful volume is 7350m
3(long 35m × wide 35m × high 6m), often organizing useful volume is 66150m
3(7350m × 3m × 3m); Three lattice ponds arrange water-in, bottom and all arrange aeration dispersion device and underwater stirrer, lattice top, both sides arranges that inclined tube, fixed weir effluent trough and bottom arrange that excess sludge collects discharge outlet, and a residual sludge pump is established in every pond, both sides arrange a scouring electromagnetic valve door, muddy water gate and clear water gate.Often group has 2 muddy water gates and 2 clear water gates, adds up to 8 muddy water gates, and 8 clear water gates.8 turbidimeter on-line checkingi muddy water turbidity are all installed at 8 muddy water gate places; Pond 1-1 all can discharge muddy water and clear water to pond 1-6, the public same water outlet channel of pond 1-1 to pond 1-3, 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., the public same clear water gate of pond 1-4 to pond 1-6 4. 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, amount to 2 public channels, 2 muddy water gates, 2 and clear water gate.Both sides replace water outlet, cycle operation.2. 1. the muddy water gate on the left side form 1 group with clear water gate, and 4. 3. the muddy water gate on the right form 1 group with clear water gate, often organizes muddy water gate and the also alternate run draining of clear water gate.In each drainage period, the first draining of muddy water gate, is back to water inlet system, automatically closes, change clear water gate opening into and arrange outward, mutual switching water discharging after muddy water discharge reaches Effluent criteria.The equipment of two gates is rectangle flashboard, realizes the switch headstock gear of ditch water flow on-off function, as shown in Figure 6 by moving up and down of flashboard.
Within the pond 1# cycle of operation, the left side is 3 ponds longitudinally, namely when pond 1-1 is to sewage biochemical reaction in the 1-3 of pond, state before its quiescent setting as shown in Figure 7a, fixed weir effluent trough is immersed in sewage, there is a large amount of active sludge in excess sludge receiving tank, quiet heavy after need to discharge completely in muddy water gate 1. opening time, be back to inhalant region, and then open that clear water strobe emission is 2. outer clears water.As shown in Figure 8, by the effect of upwelling, clear water is stratification plug-flow from bottom to top for the structural shape of the fixed weir of fixed weir effluent trough, through fixed weir effluent trough enter receiving tank as Fig. 3 in index position, its hydraulic regime is as shown in Figure 7b.
The 1# left side, pond is 3 ponds longitudinally, namely pond 1-1 is to pond 1-3, after completing quiescent setting, originally muddy water enters in the fixed weir effluent trough in respective pond, as Fig. 5 illustrates the detailed placement in 1 pond, a pond is subdivided into again 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 furnished with fixed weir effluent trough.Catchment in channel as Fig. 4 collects the originally muddy water after mud by the water hole inflow of often outputing in this pond, the originally muddy water in two other pond, the left side is also synchronous respectively to be entered in public collection channel by often outputing water hole.Now 1. muddy water gate is opened and is carried out muddy water and be disposed to HSSJ system (muddy water gathering system, this system is after being opened by muddy water control gate by the muddy water originally discharged, this batch muddy water is guided to muddy water to be propped up in channel, enter muddy water pump house, canal for water distribution is promoted to again through muddy water pump, before being finally back to former trash rack well), complete set time discharge muddy water in the muddy water drain time according to setting; After the discharge of timing muddy water terminates, close muddy water strobe emission 1., open clear water strobe emission simultaneously and 2. drain into QSWP system (clear water discharging system outside clear water, this system be by purifying treatment after water outlet up to standard by clear water control gate open after, this batch clear water is guided to clear water and props up channel, then import in clear water water distribution main channel, after sterile-processed, again through water outlet lift pump/high-order well, finally realize clear water and be disposed to surface water body).
At the outlet canal (often organizing two) in four groups of integrated reacting ponds, turbidimeter is installed, signal is delivered to corresponding upper computer respectively.Reported to the police according to the cycle of operation of the alarming value preset, reaction tank and turbidity on-line detection value by upper computer.
Reporting to the police reminds patrol officer on duty to take appropriate measures by the mode of sound and light alarm at reaction tank center blockhouse; Turbidity on-line observed value and warning simultaneously shows in existing Monitor Computer Control System; Current through practice, achieve the interlock in time variable control and equipment executing state.
Biological reaction tank is as important process processing unit in sewage treatment process, and seem even more important for adopting the pit hole mouth municipal sewage plant, Shanghai of unitank treatment process, the running condition of reaction tank directly has influence on final effluent quality.In order to the running condition of reaction tank can be grasped more timely, guarantee the processing requirements that treating processes can reach predetermined, therefore at biochemical reaction tank each outlet canal muddy water gate place, turbidimeter is installed.By turbidimeter, real-time detection is carried out to water outlet, can notify that when data occur abnormal fortune pipe personnel take corresponding treatment measures in time in time, there is the online turbidimeter real-time detector data in 1 group of pond to load in the cycle of operation at present, operation scheme achieves turbidity on-line detection dominant instruction COD
crcoordinated signals.
Turbidity one word, is called turbidimetric instrument to measure with a kind of.Turbidometer emits beam, and makes it through one section of sample, and how much light is detected by the particulate matter institute scattering in water in direction from being 90 ° with incident light.This scattered light measuring method is called scattering method.Science is thought any real turbidity all must be measured in such a way, turbidometer had both been applicable to the measurement in field and laboratory, also be applicable to round-the-clock continuous monitoring, can turbidometer be set, make it to give the alarm when surveyed turbidity value exceeds safety standards.
The research and development of the system of the sewage discharge after accurate control treatment of the present invention are just by utilizing this functional performance of turbidimeter on-line checkingi, and after the process of on-line checkingi biochemical reaction tank, turbidity value in outer last person's water, indicates the COD in tail water with this
crthe high low value of index subjet, tail water, when different turbidity situations, gets the different turbidity water samples that it is representative, and the water quality analysis method of this water sample of each batch in laboratory by national regulation measures its turbidity value and COD respectively
crvalue, and COD
crthe conventional index that whether up to standard sewage disposal degree one is important is judged just in Sewage treatment systems.By the COD of laboratory to batch water sample
crmeasurement result carry out correlation analysis with corresponding turbidity value, by COD in tail water
crwith the quantification correlation analysis of two factor indexs of turbidity, thus weigh the related intimate degree of Two Variables factor.
Analyzed by above correlation principle, draw COD
crwith this Two Variables factor correlation curve of turbidity, current COD in last person's water as outer in pit hole mouth municipal sewage plant, Shanghai biochemical reaction tank
crindex internal control is 40mg/L, and turbidity corresponding in the variables correlogram drawn is 17 (NTU), during detected value>=17 constantly (NTU) of so online turbidimeter, and both dominant instruction COD now
crexceed internal control limit value 40mg/L, do not meet and arrange outward as clear water; Otherwise, if during the < of detected value constantly 17 (NTU) of online turbidimeter, both dominant instruction COD now
crlower than internal control limit value 40mg/L, meet the one-level category-B standard in our factory's design emission standard GB18918-2002 (urban wastewater treatment firm sewage drainage standard), meet the inner quality standard value of our factory simultaneously, meet outer row's requirement.
For the left-most cell of pond 1# and pond 1-1 to pond 1-3, muddy water strobe emission 1. and the logic control contact of clear water strobe emission 2. between online turbidimeter 1YB1 as follows;
(1) when integrated reacting pond is normally run, be the process operation cycle according to itself, follow self technology controlling and process master routine and run;
(2) in a complete process cycle, when muddy water gate opening after, the on-line checkingi value of turbidimeter participates in procedure condition and controls; Now, turbidimeter on-line checkingi turbidity value data signal feeds back to the AI module of PLC, and the set(ting)value in AI module reception value and AI module carries out comparing;
(3) if when the turbidity value of on-line checkingi is less than the preset value in module, the detection numeric feedback of instrument is to PLC sequence controller, instruction is exported to instruction module by PLC sequence controller, the instruction execution signals that instruction module sends gives muddy water strobe emission and clear water strobe emission by communication module, require muddy water closing gate, no longer carry out muddy water backflow, simultaneously clear water gate opening, outside starting, clear water.
(4) when turbidimeter on-line checkingi data are equal to or greater than preset value, the detection numeric feedback of instrument is to PLC sequence controller, instruction is exported to instruction module by PLC sequence controller, the instruction execution signals that instruction module sends gives muddy water strobe emission and clear water strobe emission by communication module, require muddy water gate opening, muddy water is back to water inlet system, and clear water closing gate, ensure that the accurate control that outer last person's water is up to standard simultaneously.
The right cell of its this pond 1# and the muddy water strobe emission of pond 1-4 to pond 1-6 3. and the logical communication link of clear water strobe emission 4. between online turbidimeter 1YB2 just the same with the left side; 2# pond, 3# pond, the control thought in 4# pond and the linkage process of device control are with 1# pond.
Therefore, the method for the sewage discharge after accurate control treatment of the present invention comprises the following steps:
(1) described upper computer is sent to after the turbidity of the turbidimeter Real-time Obtaining sewage described in;
(2) whether the turbidity described in the upper computer described in judges is less than set(ting)value;
(3) if described turbidity is less than described set(ting)value, then the described muddy water closing gate described in PC control, and the clear water gate opening described in controlling, then continue step (1);
(4) if described turbidity is more than or equal to described set(ting)value, then the described muddy water gate opening described in PC control, and the clear water closing gate described in controlling, then continue step (1).
In addition, the set(ting)value in AI module is the COD of a large amount of water quality analyses undertaken by turbidity value and the laboratory of the batch water yield
cras a result, by a Dominant Data that the correlation analysis of data draws.
Have employed the system and method for the sewage discharge after the accurate control treatment in this invention, compared with prior art, have the following advantages:
(1) the turbidity value on-line checkingi precision of turbidimeter in this Sewage treatment systems is very high, and result of use is better;
(2) installation aspect also uses the consideration buckling self-locking cleverly, and the assembly maintenance of instrument underwater portion is very convenient;
(3) after implanting automatic control system, the online drain time of accurately automatic tracing locking muddy water and the best dividing point of drain time of clear water; Effectively can regulate the switching of muddy water strobe emission and clear water strobe emission, for the qualified discharge processing rear tail water provides more reliably, controls more accurately, more efficiently to ensure;
(4) improve sewage disposal qualified discharge rate;
And alleviate manpower handling cost, improve the actual achievements such as the efficiency of management (5).
Of the present invention achieve drainage pattern in the cycle of operation in whole integrated reacting pond controlled plant muddy water, clear water gate switch in the mode following master routine under, the alarm limits set with the on-line checkingi value of turbidimeter carries out linear quadratic control interlock.
Meet after realizing muddy water emission compliance when clear water arranges index outward and closed by muddy water strobe emission, automatically switch to the water outlet of clear water gate, reasonably control the shortest muddy water drain time, improve drain time and the quantity discharged of clear water.
What after giving process to the full extent, the overall emission compliance of tail water provided ensures more reliably, save the cost of manpower management, eliminate the present situation that dependence switches the low reliability of gate manually, improve the efficiency of steady running, improve the effect of management, for continuous, stable, safety, production up to standard provide more solid technical qualification measure.
To each side such as theoretical investigation, engineering design, control method, operational management of this Technology from now on, represent newest fruits and the engineering experience in this field domestic, existing higher theory value, have again great practical value.
Other forms of sewage work is run and also has the higher guidance meaning, even have high reference to the Integrated design of whole sewage treatment industry and sewage treatment project from now on, operation management.
In this description, the present invention is described with reference to its specific embodiment.But, still can make various amendment and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification sheets and figure are regarded in an illustrative, rather than a restrictive.
Claims (8)
1. a system for the sewage discharge after accurate control treatment, is characterized in that, described system comprises integrated reacting pond, turbidimeter and upper computer; Described integrated reacting pond is provided with several muddy water gate and several clear water gate; And described muddy water gate is provided with turbidimeter, described turbidimeter and described upper computer communicate, and described upper computer is connected with described clear water gate and described muddy water gate.
2. the system of the sewage discharge after accurate control treatment according to claim 1, is characterized in that, described integrated reacting pond comprises four group reaction ponds, and four described group reaction pond independent operatings; The unitank subsystem of three standards is laterally arranged in parallel in every group reaction pond, and every bar unitank subsystem Hu Bu UNICOM; Longitudinally three lattice ponds are set side by side with in unitank subsystem, and make, in a group reaction pond, there are nine lattice ponds, the surrounding in nine described lattice ponds is provided with braiding channel, and makes not direct with the described braiding channel UNICOM in the lattice pond, centre one in Article 2 unitank subsystem; Every group reaction pond is provided with two groups of gates, and often group gate comprises a muddy water gate and a clear water gate, and described braiding channel is connected with described muddy water gate with described clear water gate.
3. the system of the sewage discharge after accurate control treatment according to claim 2, it is characterized in that, be provided with inclined tube with on the lattice limit of the close described braiding channel in eight lattice ponds of the direct UNICOM of described braiding channel, and be provided with fixed weir effluent trough and excess sludge receiving tank in eight described lattice ponds.
4. the system of the sewage discharge after accurate control treatment according to claim 3, is characterized in that, the groove edge of described fixed weir effluent trough is zigzag slot edge.
5. the system of the sewage discharge after accurate control treatment according to claim 2, is characterized in that, described clear water gate and described muddy water gate are flashboard, and described flashboard is connected with described upper computer.
6. the system of the sewage discharge after accurate control treatment according to claim 1, is characterized in that, is provided with aeration dispersion device and underwater stirrer at the bottom of the pond in described integrated reacting pond.
7. the system of the sewage discharge after accurate control treatment according to claim 1, it is characterized in that, described upper computer comprises:
AI module, whether the turbidity in order to the sewage judging described turbidimeter monitoring meets the requirements;
Instruction module, namely the unlatching in order to the muddy water gate according to the judged result control of AI module and clear water gate closes;
Alarm module, reports to the police in order to control warning howler according to the judged result of AI module.
8. realize a method for the sewage discharge after accurate control treatment 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) described upper computer is sent to after the turbidity of the turbidimeter Real-time Obtaining sewage described in;
(2) whether the turbidity described in the upper computer described in judges is less than set(ting)value;
(3) if described turbidity is less than described set(ting)value, then the described muddy water closing gate described in PC control, and the clear water gate opening described in controlling, then continue step (1);
(4) if described turbidity is more than or equal to described set(ting)value, then the described muddy water gate opening described in PC control, and the clear water closing gate described in controlling, then continue step (1).
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| CN104649404B (en) | 2016-08-24 |
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