CN104504617A - Conventional water supply plant efficacy diagnosis method - Google Patents
Conventional water supply plant efficacy diagnosis method Download PDFInfo
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Abstract
The invention discloses a conventional water supply plant efficacy diagnosis method, belongs to the technical field of water purification plant efficacy diagnosis, and provides the conventional water supply plant efficacy diagnosis method with the goal of establishing an optimal systematic and modeled urban water supply plant efficacy. The chemical consumption, water consumption and power consumption for actual production of each technological unit of an urban conventional water supply plant are compared with the chemical consumption, water consumption and power consumption for empirical water saving in the same system to finish energy-saving and consumption-reducing potential judgment. On the premise that the water supply plant provided with a reflow system has the energy-saving and consumption-reducing potential, each treatment unit in the process is analyzed one by one to determine the energy-saving key point of each treatment unit of the urban water supply plant; an improvement scheme is implemented aiming at the key point; finally comprehensive benefit analysis is performed to guarantee that actual benefit is produced by comprehensive energy saving and consumption reduction so as to achieve the goal of optimal efficacy. The method has practical guiding significance to evaluation of actual efficacy situation of the conventional water supply plant.
Description
Technical field
The invention belongs to water treatment plant's usefulness diagnostic techniques field, relate to a kind of method setting up the diagnosis of conventional water-supply plant usefulness.
Background technology
The continuous deterioration of water environment and the ongoing shortage of water resource are the subject matter that China's Urban water supply faces.This adds difficulty to the raising of city water treatment plant water supply quality undoubtedly, and urban even have impact on normal domestic water due to shortage of water resources, and the pollution of resource of water supply adds the water supply intractability of water treatment plant.The long term planning of China's Urban water supply should improving quality of water supply, improve water services, optimize water supply cost and guarantee for overall goal.Therefore the conventional water purification treatment technology such as the original coagulation of part water factory, precipitation, filtration, sterilization is all faced with the needs of upgrading, we need to make overall prouctiveness evaluation to water treatment plant's water treatment system, make it under the prerequisite of water quality reaching standard, save energy consumption production control operating cost as far as possible.
At present, the usefulness diagnosis research work of city water treatment plant mainly for power consumption, medicine consumption and single technique unit energy consumption diagnostic mode and technology.But these achievements in research lack systematicness and relevance, drinking water plant status of energy consumption evaluation model key technology research is not enough.Therefore, by conventional water-supply plant usefulness diagnostic mode, in integrated conventional water-supply plant each technique unit efficiency evaluation technical foundation, use system optimization means, the factors such as the source quality of water factory, treatment scale, technological process and water quality safety are combined with economic factors, comprehensive analytic routines water-supply plant Efficacy Profile, system, all sidedly study technique, equipment and the method for operation control gordian technique, to enforcement conventional water-supply plant energy-saving and emission-reduction most important.
Summary of the invention
In order to the gordian technique solving relevance, systematicness and the usefulness diagnosis that existing conventional water-supply plant usefulness diagnostic mode exists lacks the problem of systems theory research, the invention provides a kind of conventional water-supply plant usefulness diagnostic method.
The object of the invention is to be achieved through the following technical solutions:
A kind of conventional water-supply plant usefulness diagnostic method, comprises the steps:
Step one: analytic routines water-supply plant overall operation present situation, by collecting conventional water-supply plant design and operation data, the water yield, raw water quality situation, effluent water quality situation, reagent consumption situation, present situation such as water consumption situation and power consumption situation etc. are analyzed, preliminary assessment is carried out to Water Works system cloud gray model present situation, whether tentatively determines conventional water-supply plant usefulness normally and whether possess the potentiality of energy-saving and emission-reduction;
Step 2: possess the condition of energy-saving potential at conventional water-supply plant under, respectively usefulness diagnostic test is carried out to conventional water-supply plant water-purifying process process unit, determine the key point of each processing unit enhancing efficiency, the control technology promoting performance improvements scheme is implemented to described key point;
Step 3: after implementing transformation to conventional water-supply plant key point, carries out water yield analysis, Economic and Efficiency Analysis and system discordance to Water purification total system before and after transformation respectively;
Step 4: after to each technique unit transformation of conventional water-supply plant, from the conventional water-supply plant Efficacy Results of the Comprehensive Assessments such as water quality condition, water yield load condition, energy situation, blowdown situation, water producing cost situation and main process situation, if assessment result is defective, turns back to step 2 and again the key point of each unit of common process is adjusted, until meet the demands.
The present invention with set up systematization, medelling urban water supply factory usefulness optimum for target, provide conventional water-supply plant usefulness diagnostic method.Consume according to the medicine of City Routine water-supply plant each technique unit actual production, the medicine consumption of the lower empirical water saving of water consumption and power consumption and same system, water consumption and power consumption, and it to be compared, completes energy-saving and cost-reducing potentiality and judge.Possess the prerequisite of energy-saving and emission-reduction potentiality at the water-supply plant determining to have return-flow system under, each processing unit in technique is analyzed one by one, determine the energy-conservation key point of each processing unit of urban water supply factory, improvement project is implemented for key point, finally carry out comprehensive benefit analysis, guarantee that synthesis energy saving subtracts power consumption and produces actual benefit, reach the optimized target of usefulness.The present invention comprehensively analyzes from the water resource water quality of urban water supply factory, treatment scale, the various aspects such as technological process and water quality safety, proposes conventional water-supply plant usefulness diagnostic mode.The present invention proposes water-supply plant common process unit Efficacy Profile diagnostic techniques and system optimization water saving, saves medicine, power-saving technique, to realize the overall equilbrium of water saving, joint medicine, economize on electricity.Guaranteeing that water quality, the water yield and economic factors are with under the actual condition conformed to, and the invention provides a set of conventional water-supply plant usefulness diagnostic method, having practical guided significance for the actual Efficacy Profile evaluating conventional water-supply plant.
Accompanying drawing explanation
Fig. 1 is flocculation unit spoil disposal water total solid of the present invention trend schematic diagram over time;
Fig. 2 is that precipitation unit sludge from sedimentation tank water total solids content of the present invention is along pond length direction or sludge-drainage time situation of change schematic diagram;
Fig. 3 is the variation tendency of filter element filter fluorescence method turbidity of the present invention with backwashing time.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described; but be not limited thereto; everyly technical solution of the present invention modified or equivalent to replace, and not departing from the spirit and scope of technical solution of the present invention, all should be encompassed in protection scope of the present invention.
Embodiment one: present embodiments provide for a kind of conventional water-supply plant usefulness diagnostic method, concrete implementation step is as follows:
Step one: analytic routines water-supply plant overall operation present situation, by collecting conventional water-supply plant design and operation data, mainly comprise and the water yield, raw water quality situation, effluent water quality situation, reagent consumption situation, present situation such as water consumption situation and power consumption situation etc. are analyzed, preliminary assessment is carried out to Water Works system cloud gray model present situation, tentatively determine that whether conventional water-supply plant usefulness is normal, tentatively determine whether the potentiality possessing energy-saving and emission-reduction;
Step 2: possess the condition of energy-saving potential at conventional water-supply plant under, respectively to conventional water-supply plant water-purifying process: the processing units such as mixing, flocculation, precipitation, filtration, sterilization carry out usefulness diagnostic test, determine the key point of each processing unit enhancing efficiency, described key point refers to operational factor, operating mode is arranged and instrument and equipment, implements to described key point the control technology promoting performance improvements scheme;
Step 3: after implementing transformation to each key point of conventional water-supply plant, carries out water yield analysis, Economic and Efficiency Analysis and system discordance to Water purification total system before and after transformation respectively;
Step 4: after to each technique unit transformation of conventional water-supply plant, from the conventional water-supply plant Efficacy Results of the Comprehensive Assessments such as water quality condition, water yield load condition, energy situation, blowdown situation, water producing cost situation and main process situation, if assessment result is defective, turns back to step 2 and again the key point of each unit of common process is adjusted, until meet the demands.
Embodiment two: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Design and operation data described in step one refers to design instruction and this water factory production report of nearly 1 year of water factory, and wherein production report comprises source quality situation form, water quality statistical report form, water factory's electricity consumption situation form, effluent water quality situation form and condition of production form.Thus obtain the data such as water yield situation of change, former water and effluent water quality situation, reagent consumption situation, power consumption situation and water consumption situation.Described water yield situation of change refer to the per day output of nearly 1 year and water factory 24h by time process the water yield.The water quality situation of the former water of described assay specifically refers to: according to raw water turbidity, ammonia nitrogen NH in recent years
3-N, COD
mnvariation tendency, determines former water classification.Former water classification described in present embodiment is mainly divided into: I class surface water quality, II class surface water quality, III class surface water quality.Described reagent consumption situation refers to the Expenditure Levels of coagulant and coagulant aid.Described power consumption situation refers to the electricity that all production equipments of water-supply plant consume.Described water consumption situation refers to water factory's self water consumption, mainly comprises spent filter backwash water, flocculation basin spoil disposal water, sludge from sedimentation tank water, water factory's greening water, domestic water, water sprayer water and motor cooling water.
Embodiment three: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Evaluation carried out to Water Works system cloud gray model present situation refer to described in step one: the average load rate of urban water supply factory actual motion contrasts with the average load rate in the energy-conservation scope of experience determined, determine the water supply tension of urban water supply factory, the production capacity situation of urban water supply factory disposal system, energy-saving potential are evaluated.
Described average load rate calculates according to mean water-consumption and design water supply capacity, is represented by formula one:
Formula one:
.
Mean water-consumption described in formula is the average clean water production rate according to urban water supply factory and office reason running; Designed supply capacity refers to from determined supply water yield water plant design and planning being had to reference effect of city planning, industrial enterprise's condition of production, resident living condition and meteorological condition.
The evaluation criterion of the energy-conservation average load rate of determination experience described in present embodiment is: urban water supply factory disposal system average load rate is defined as the energy-conservation scope of experience higher than 60%, and now Water Works system capacity efficiency is normal; Urban water supply factory disposal system average load rate lower than 60% time, now Water Works system over capacity, must carry out reducing energy consumption to it.
Embodiment four: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Described in step one, whether permanent rule water-supply plant energy consumption is normal really specifically refers to: the medicine consumption of conventional water-supply plant, power consumption, water consumption consume with other medicines with the conventional water-supply plant of scale, power consumption, water consume empirical data and compares, thus determine the Efficacy Profile of water-supply plant, the disposal system energy consumption of water-supply plant ability of saving is evaluated.
Embodiment five: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
The condition possessing the potentiality of energy-saving and emission-reduction described in step one refers to: conventional water-supply plant energy consumption is large and significantly can reduce the unit of personal water consumption after transformation, adjust operation mode reduces power consumption and medicine consumption, and described personal water consumption unit refers to: coagulating sedimentation unit, filter element.
Embodiment six: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Conventional water-supply plant water-purifying process described in step 2 refers to former water after water intake pumping station successively through the water-supply plant of " mixing-flocculation-precipitation-filter-sterilization " five road treatment process.
Mixing described in present embodiment refers to and the medicament of input is promptly spread in processed water to create the process of sound response condition; Described flocculation refers to by dosing coagulant in process water, makes micelle material wherein cohesion occur and flocculate and separate, with the method for purifying liquid waste; Described precipitation refers to the process utilizing gravity settling effect to remove impurities in water; Described filtration refers to by bulk material or porous medium to remove the engineering of impurities in water; Described sterilization refers to disinfection way such as comprising liquid chlorine disinfection method, disinfection by chlorine dioxide method, ozone disinfection, ultraviolet sterilization.
Embodiment seven: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
The key point of the lifting usefulness described in step 2 refers to the operation point in urban water supply factory processing procedure, described operation is specially according to the difference of each processing unit: the hybrid mode of mixed cell, the flocculation parameter of flocculation unit, the spoil disposal of flocculation unit is arranged, the sludge discharge way of precipitation unit, the method of operation of filter element, the backwashing parameters of filter element and the sterilization form of disinfection unit.
Embodiment eight: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Referring to the control technology of described key point enforcement Energy-saving reformation scheme described in step 2 is optimized control one by one to the operation point of each technique unit of described conventional water-supply plant.
Embodiment nine: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Water-supply plant common process unit usefulness diagnostic test is specifically referred to described in step 2: the diagnosis of mixed cell usefulness, the diagnosis of flocculation unit usefulness, the diagnosis of precipitation unit usefulness, the diagnosis of filter element usefulness, the diagnosis of disinfection unit usefulness.Described each unit usefulness diagnosis includes operation As-Is analysis, checks design parameter, the energy consumption comparison of water factory under low turbidity phase, middle turbidity phase and high concentrtion phase three kinds of operating modes and to each unit innovative approach of water factory's total system.
Described mixed cell usefulness diagnosis refers to and is optimized mixed cell energy-conservation, and its optimizing process is: by comparing the relation of design current velocity and actual flow velocity in urban water supply factory coagulation unit mixed process, determine corresponding mixed method improvement project.The mode of mixing has mechanical mixture and waterpower mixing, and waterpower mixing comprises tubular static mixer, water pump mixing, diffusion mixer, drop (hydraulic jump) mixing, based on static pipeline mixer, by most of water factory is adopted.Check according to the actual inflow of water factory, when adopting waterpower mixing, adjust current actual speed, compare with design load, when actual value is when designing in allowed band, maintain the statusquo, when when in actual value off-design allowed band, certain technological means is taked to correct flow velocity to designing interval, during as adopted tubular static mixer flow on the low side, the tube mixer being installed in parallel pipe with small pipe diameter at former tube mixer can be taked, when flow is lower than design load, the water yield flows through pipe with small pipe diameter tube mixer, concrete improvement means should adjust according to actual conditions, when adopting mechanical mixture, adjust the actual stirring rate gradient G of current, design load is generally 600 ~ 1000 S
-1, according to actual amount of water adjustment stirring machine frequency, frequency converter installed by suggestion stirring machine, changes stirring rate in real time, can reach good mixed effect according to the water yield, saves coagulant, can save the electricity charge again.
Described flocculation unit usefulness diagnosis refers to the variation tendency of sludge-drainage time, determines that the spoil disposal of best coagulation unit lasts, to reach efficient spoil disposal, saving water resource by spoil disposal water total solids content in research spoil disposal water process.Because the urban water supply factory water yield causes flow velocity in flocculation basin to reduce lower than designed supply capacity, flco easily deposits in gallery, causes flco broken, can be deposited on bottom flocculation basin, therefore need to arrange corresponding discharge pipeline after reducing area of passage.The determination that spoil disposal lasts is see Fig. 1, and the variation tendency of spoil disposal link is substantially identical: in whole spoil disposal process, and the total solid concentration of spoil disposal water is by high step-down, from spoil disposal, spoil disposal water total solid concentration increases sharply, and occurs maximal value, i.e. peak value in the short time; Trend towards after described spoil disposal water total solid concentration is reduced to rapidly time point T1 steadily, changing no longer obvious.So time point T1 can be considered as the end point that coagulation unit spoil disposal lasts.In a practical situation, due to influent turbidity and the height of water inlet flow velocity affect that flco at the bottom of flocculation basin pond deposits number, therefore, the spoil disposal water total solid concentration in different quality period be measured, determine the time point T1 under different quality condition in period.By the test of this science, determine flocculation basin sludge-drainage time point, so both can arrive spoil disposal object, can wastewater flow rate be reduced again.
Described precipitation unit usefulness diagnosis refers to optimizes sludge from sedimentation tank mode, by research settling basin pond prodelta clay mud situation, the control mode that soil discharging facility optimization water saving runs is proposed, see Fig. 2: change critical point L1, L2 along settling basin pond length direction or sludge-drainage time according to the pond prodelta clay mud situation determined, the optimization water saving method of operation of various soil discharging facility is proposed, the method for operation that the mode that described optimization water saving runs has variable-speed operation, partition running or speed change partition running to combine.Described variable-speed operation refers at 0 ~ L1 section mud total solids content high, the frequency of suction dredger, mud scraper is turned down, and also namely travelling speed slows down, or is relatively extended the opening time of the mud valve of perforated sludge discharge pipe; The total solids content of L1 ~ L2 section is low relative to 0 ~ L1 section, the frequency of suction dredger, mud scraper is heightened, and also namely travelling speed tunes up, or is relatively extended the opening time of the mud valve of perforated sludge discharge pipe; The total solids content of L2 ~ 1 section is minimum, the frequency of suction dredger, mud scraper is heightened, and also namely travelling speed tunes up, or is relatively shortened the opening time of the mud valve of perforated sludge discharge pipe.Described partition running refers to that the mud total solids content of 0 ~ L2 section is high, and L2 ~ 1 section mud total solids content is low, then can set suction dredger, mud scraper and come and go 2 ~ 3 strokes in 0 ~ L2 section again after the drained mud of whole process; Or setting perforated sludge discharge pipe mud valve opening times, 0 ~ L1 section open 3 times, L1 ~ L2 section opens 2 times, open again once for 0 ~ 1 section.The method of operation that described speed change partition running combines specifically refers to be turned down in the frequency of 0 ~ L1 section by suction dredger, mud scraper, also namely travelling speed slows down, or the opening time of the mud valve of perforated sludge discharge pipe is extended relatively, and will come and go 2 strokes, or setting perforated sludge discharge pipe mud valve opens 3 times; Heighten in the frequency of L1 ~ L2 section by suction dredger, mud scraper, also namely travelling speed tunes up, or is relatively extended the opening time of the mud valve of perforated sludge discharge pipe, and round 1 stroke or setting perforated sludge discharge pipe mud valve open 2 times; Section the frequency of suction dredger, mud scraper to be heightened in L2 ~ 1, also namely travelling speed tunes up, or is relatively shortened the opening time of the mud valve of perforated sludge discharge pipe, and sludge discharging machine does not perform round spoil disposal, or does not perform and repeatedly open the operation of discharge pipeline mud valve.
Described filter element usefulness diagnosis refers to be optimized filter back washing mode and optimizes the filter cycle.The backwash mode in described filter tank refers in filter back washing process with water flushing filter sand or the backwashing manner having surface sweep washing with air water microdilatancy concurrently.Because the too high meeting of back washing strength causes filter tank to run sand, back washing strength is too low, rinses insufficient, affect filtration efficiency, so need to check water backwash rate, gas flushing intensity, surface sweep washing water intensity, make corresponding transformation, described backwash rate refers to washing water quantity or the gas flow of unit filtrate area in the unit interval, generally should L/ (m
2s).Described filter back washing optimum configurations refers to the variation tendency of turbidity in the whole backwash process in research filter tank, see Fig. 3: in the whole process of back flush, the turbidity of backwashing wastewater first raises fast, peak value is reached in the T2 moment, then decline, tend towards stability after the T4 moment, change no longer obvious.Time, air water flush time, the independent flush time of water is simultaneously rushed as gas can be adjusted respectively according to T2, T3, T4 moment in V-type filter tank.Air water flush time simultaneously can be shortened according to T3, reduce the power consumption of air compressor, washing time can be shortened according to T4, reduce the back flush water yield, saving water resource; Washing time can be shortened according to T4, saving water resource in other types filter tank.Determine described filter cycle specifically to refer to DO, pH, the NH by water before filter in the research filter tank full filter cycle, after filter
3-N, NO
3 -, NO
2 -situation of change, determine that whether current filter cycle is reasonable, rational criterion be late period in filter cycle These parameters whether can occur rise trend, if raised, then filter cycle should be shortened, if can not affect, then can proper extension filter cycle, concrete duration need be determined by experiment.
L1 described in present embodiment refers to sludge from sedimentation tank water total solids content peak position, L2 refers to the location point that spoil disposal water total solids content tends to be steady after this point, T1 refers to flocculation basin spoil disposal water total solid change critical point, T2 refers to backwashing wastewater turbidity and reaches the highest time point, T3 refers to the air-water backwashing time in backwash process, and T4 refers to the time point that backwashing wastewater turbidity tends to be steady.
Described disinfection way refers to according to raw water quality, effluent quality requires, sanitizer is originated, DBPs is formed possibility, water purification treatment technology etc., determined by technology and economy comparison.Chlorination, the sterilization of chlorine ammonia, disinfection by chlorine dioxide, ozonization and disinfection by ultraviolet light can be adopted, also can adopt the combination of said method.Sanitizer toss area should should according to raw water quality, technological process and sterilization method etc. according to sanitizer toss area, and with due regard to may the determining of change of water quality, can add separately after filtration, also can in technological process multi-point adding.Adopt Cl
2, ClO
2, O
3sterilization is compared to the generation that can increase THMs in disinfecting process during chloramines disinfection, and chloramines has relatively lasting disinfecting time in pipe network, adopts the chlorine taste problem in chloramines disinfection tap water also can be alleviated.Compared to chlorine in the breeding again controlling bacterium in pipe network and biological membrane chloramines also more effective.But wanting to obtain the effect identical with chlorination then needs chloramines to contact with water for a long time, select chloramines disinfection as output water permanent sanitizer keeping hygienic quality in urban pipe network system, check chloramines and add ratio.
Embodiment ten: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Respectively water yield analysis, Economic and Efficiency Analysis and system discordance are carried out to Water purification total system before and after transformation described in step 3, the benefit brought after transformation is mainly around the change of water consumption, and the change of other indexs caused is consumed by water, directly have influence on water by the adjustment of each technique unit method of operation, operational factor to consume, the Water resources expenditure of water factory, the electricity charge and reagent consumption expense have minimizing in various degree, Expenditure Levels and local economy situation is run, the economic benefit that evaluation produces in conjunction with water-supply plant.The concrete steps of the evaluation of economic benefit described in present embodiment are: contrast the personal aqueous condition that four processing units improve front and back respectively, calculate total self water consumption and reduce amplitude; By calculating the cost saving of the rear former water resources taxes of transformation, the electricity charge of one-level pumping plant, coagulant cost, can show that cost saving accounts for the ratio of Water resources expenditure.Comprehensive Correlation evaluates the economic benefit brought before and after energy-saving consumption-reducing, determines the rationality of Energy-saving reformation scheme, realizes synthesis energy saving.Described environmental benefit refers to the discharge by reducing wastewater flow rate after changing each technique unit key point, can alleviate environmental pollution, the environmental benefit that evaluation produces.
Embodiment 11: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Water quality condition described in step 4 refers to source quality and effluent water quality, described source quality and effluent water quality classification perform according to " Drinking Water water quality standard " CJ3020-93 and " drinking water sanitary standard " GB5749-2006 respectively, described criteria for classification is: when source quality is I, II, III class, then water quality condition is at least 3 stars; When source quality is inferior to below III, lower than 3 stars; When effluent water quality is better than standard, then water quality condition is better, and higher grade.
Embodiment 12: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Water yield load condition evaluation criterion described in step 4 is: when water factory's rate of load condensate is 90-110%, is 5 stars; When water factory's rate of load condensate is 80-90% or 110-120%, be 4 stars; When water factory's rate of load condensate is 70-80% or 120-130%, be 3 stars; When water factory's rate of load condensate is 60-70% or 130-140%, be 2 stars; When water factory's rate of load condensate be lower than 60% or higher than 140% time, be 1 star.
Embodiment 13: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Energy situation described in step 4 evaluates principle: use clean energy resource grade high, use the grade of the general energy on the low side.Described clean energy resource is as sun power, wind energy, water energy and biological energy source etc.The described general energy relies on fossil energy generating (electric power as the conveying of vigor generating plant).
Embodiment 14: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Blowdown status evaluation standard described in step 4 is: the fewer higher grade of discarded object total amount produced in factory; When having generation return of waste water in factory, grade is at least 3 stars; When all factory effluents of total reflux, grade is at least 4 stars; When incomplete backflow factory effluent, grade is at least 3 stars; When the mud produced in factory has harmless treatment, higher grade; When dewatered sludge solid content lower than 20% time, below 3 stars, when solid content is between 20%-30%, be 3 stars, when solid content higher than 30% time, be at least 4 stars.
Embodiment 15: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Water producing cost situation described in step 4 mainly comprises medicine consumption situation, power consumption situation and water consumption situation, and evaluating principle is: medicine consumption, power consumption, water consumption is lower, and performance ratings is higher; Medicine consumption, power consumption, water consumption needs and water factory of the same type makes comparisons, and grade needs experts' evaluation.
Embodiment 16: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
Main process status evaluation principle described in step 4 is: when operational factor is more close to design load, performance ratings is higher; When operational factor more deviates from design load, performance ratings is lower; When each unit auxiliary device running status is better, performance ratings is higher; When each unit auxiliary device running status is poorer, performance ratings is lower.
Embodiment 17: present embodiment is further illustrating the conventional water-supply plant usefulness diagnostic mode described in embodiment one.
The conventional water-supply plant Efficacy Results of Comprehensive Assessment described in step 4 refers to the result of 5 stars, and rank is higher, and Efficacy Profile is more excellent.The foundation that whether qualified assessment result described in step 4 is is: when result is that 1 star refers to the non-constant of Efficacy Profile, urgently upgrading; When result, to be that 2 stars refer to Efficacy Profile unreasonable, needs upgrading; When result, to be that 3 stars refer to Efficacy Profile qualified, if upgrading can be saved energy and reduce the cost, reduces costs; When result is that 4 stars represent that Efficacy Profile is good, except individual process unit needs improve, can not transform; When result, to be that 5 stars refer to Efficacy Profile very outstanding, and water factory is in optimum operating condition, does not need to change, and continues to keep.
The present invention is in conventional water-supply plant usefulness diagnostic procedure, and following factor can affect its improvement project preset:
(1) structures form and unit type: in processing procedure, each technique unit may be subject to the impact of structures and equipment.As managed in unit throughout, the difference of its processing mode, can make the situations such as water consumption, power consumption, medicine consumption different; And the processing procedure of same process unit also because of the difference of structures type, unit type, running status, hydraulics can create a difference, therefore the difference that water consumption in improvement project, power consumption, medicine consume can be caused.Therefore, process equipments different in real process, its transformation process and operation control method also can there is some difference.
(2) water quality factors: water-supply plant is in actual moving process, and the change of raw water turbidity is large, and the change of the water quality factors such as PH, colourity and basicity is often less.Therefore, the factor of impact transformation is mainly raw water turbidity.Meanwhile, adding of coagulant and coagulant aid etc. can change raw water quality structure and physicochemical characteristics, and water quality also can constantly be changed in processing procedure.
(3) Water Temperature: because surface water is comparatively large by external environment influence, particularly temperature.The water temperature of the former water of the water-supply plant in different time, region also exists bigger difference, and temperature mainly passes through the dosage controlling coagulant aid, coagulant etc. on the impact of water treatment system, this can to subsequent processes as the operation of the process such as spoil disposal, back flush controls have an impact.
Claims (10)
1. a conventional water-supply plant usefulness diagnostic method, is characterized in that described method step is as follows:
Step one: analytic routines water-supply plant overall operation present situation, by collecting conventional water-supply plant design and operation data, the water yield, raw water quality situation, effluent water quality situation, reagent consumption situation, water consumption situation and power consumption situation present situation are analyzed, preliminary assessment is carried out to Water Works system cloud gray model present situation, whether tentatively determines conventional water-supply plant usefulness normally and whether possess the potentiality of energy-saving and emission-reduction;
Step 2: possess the condition of energy-saving potential at conventional water-supply plant under, respectively usefulness diagnostic test is carried out to conventional water-supply plant water-purifying process process unit, determine the key point of each processing unit enhancing efficiency, the control technology promoting performance improvements scheme is implemented to described key point;
Step 3: after implementing transformation to conventional water-supply plant key point, carries out water yield analysis, Economic and Efficiency Analysis and system discordance to Water purification total system before and after transformation respectively;
Step 4: after to each technique unit transformation of conventional water-supply plant, from the conventional water-supply plant Efficacy Results of water quality condition, water yield load condition, energy situation, blowdown situation, water producing cost situation and the Comprehensive Assessment of main process situation, if assessment result is defective, turns back to step 2 and again the key point of each unit of common process is adjusted, until meet the demands.
2. conventional water-supply plant usefulness diagnostic method according to claim 1, it is characterized in that in described step one, carry out evaluation to Water Works system cloud gray model present situation to refer to: the average load rate of urban water supply factory actual motion contrasts with the average load rate in the energy-conservation scope of experience determined, determine the water supply tension of urban water supply factory, the production capacity situation of urban water supply factory disposal system, energy-saving potential are evaluated.
3. conventional water-supply plant usefulness diagnostic method according to claim 1, it is characterized in that in described step one, determine that whether conventional water-supply plant energy consumption is normal specifically to refer to: the medicine consumption of conventional water-supply plant, power consumption, water consumption consume with other medicines with the conventional water-supply plant of scale, power consumption, water consume empirical data and compares, thus determine the Efficacy Profile of water-supply plant, the disposal system energy consumption of water-supply plant ability of saving is evaluated; The condition possessing the potentiality of energy-saving and emission-reduction refers to: conventional water-supply plant energy consumption is large and significantly can reduce the unit of personal water consumption after transformation, and adjust operation mode reduces power consumption and medicine consumption.
4. conventional water-supply plant usefulness diagnostic method according to claim 1, it is characterized in that in described step 2, the key point of lifting usefulness refers to the operation point in urban water supply factory processing procedure, described operation is specially according to the difference of each processing unit: the hybrid mode of mixed cell, the flocculation parameter of flocculation unit, the spoil disposal of flocculation unit is arranged, the sludge discharge way of precipitation unit, the method of operation of filter element and backwashing parameters, the sterilization form of disinfection unit.
5. conventional water-supply plant usefulness diagnostic method according to claim 1, it is characterized in that in described step 2, water-supply plant common process unit usefulness diagnostic test is specifically referred to: the diagnosis of mixed cell usefulness, the diagnosis of flocculation unit usefulness, the diagnosis of precipitation unit usefulness, the diagnosis of filter element usefulness, the diagnosis of disinfection unit usefulness; Described each unit usefulness diagnosis includes operation As-Is analysis, checks design parameter, the energy consumption comparison of water factory under low turbidity phase, middle turbidity phase and high concentrtion phase three kinds of operating modes and to each unit innovative approach of water factory's total system.
6. conventional water-supply plant usefulness diagnostic method according to claim 1, it is characterized in that in described step 4, water yield load condition evaluation criterion is: when water factory's rate of load condensate is 90-110%, is 5 stars; When water factory's rate of load condensate is 80-90% or 110-120%, be 4 stars; When water factory's rate of load condensate is 70-80% or 120-130%, be 3 stars; When water factory's rate of load condensate is 60-70% or 130-140%, be 2 stars; When water factory's rate of load condensate be lower than 60% or higher than 140% time, be 1 star.
7. conventional water-supply plant usefulness diagnostic method according to claim 1, it is characterized in that in described step 4, blowdown status evaluation standard is: the fewer higher grade of discarded object total amount produced in factory; When having generation return of waste water in factory, grade is at least 3 stars; When all factory effluents of total reflux, grade is at least 4 stars; When incomplete backflow factory effluent, grade is at least 3 stars; When the mud produced in factory has harmless treatment, higher grade; When dewatered sludge solid content lower than 20% time, below 3 stars, when solid content is between 20-30%, be 3 stars, when solid content higher than 30% time, be at least 4 stars.
8. conventional water-supply plant usefulness diagnostic method according to claim 1, it is characterized in that in described step 4, water producing cost status evaluation principle is: medicine consumption, power consumption, water consumption is lower, and performance ratings is higher; Medicine consumption, power consumption, water consumption needs and water factory of the same type makes comparisons, and grade needs experts' evaluation.
9. conventional water-supply plant usefulness diagnostic method according to claim 1, it is characterized in that in described step 4, main process status evaluation principle is: when operational factor is more close to design load, performance ratings is higher; When operational factor more deviates from design load, performance ratings is lower; When each unit auxiliary device running status is better, performance ratings is higher; When each unit auxiliary device running status is poorer, performance ratings is lower.
10. conventional water-supply plant usefulness diagnostic method according to claim 1, is characterized in that in described step 4, and the foundation that whether qualified assessment result is is: when result is that 1 star refers to the non-constant of Efficacy Profile, urgently upgrading; When result, to be that 2 stars refer to Efficacy Profile unreasonable, needs upgrading; When result, to be that 3 stars refer to Efficacy Profile qualified, if upgrading can be saved energy and reduce the cost, reduces costs; When result is that 4 stars represent that Efficacy Profile is good, except individual process unit needs improve, can not transform; When result, to be that 5 stars refer to Efficacy Profile very outstanding, and water factory is in optimum operating condition, does not need to change, and continues to keep.
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Application publication date: 20150408 |