CN103395947A - V-shaped gas stripping reflux two-stage precipitation integrated sewage treatment tank - Google Patents
V-shaped gas stripping reflux two-stage precipitation integrated sewage treatment tank Download PDFInfo
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Abstract
The present invention provides a V-shaped gas stripping reflux two-stage precipitation integrated sewage treatment tank, wherein the rectangular tank body contains an anaerobic zone, an anoxic zone, an aeration zone, a V-shaped clarifying reflux zone and an inclined pipe/plate precipitation zone, wherein the water surface on the upper portion of a vertical separation wall arranged between the anoxic zone and the aeration zone is provided with a reflux hole, is matchedly provided with an umbrella-shaped stirrer and an auxiliary flow maker, and is further provided with an inclined hole-type gas-water separator, a surface type gas stripping micro power reflux device, an L-shaped hydropower hybrid spiral flow generator and other equipment so as to achieve gas stripping reflux of a nitrification liquid and sludge, and achieve a two-stage precipitation treatment on a mixed solution after a biochemical reaction. The V-shaped gas stripping reflux two-stage precipitation integrated sewage treatment tank has a simple and compact structure, and has the following advantages that: denitrogenation, phosphorus removing and precipitation separation are completed in the same tank; and compared with the conventional biochemical reaction tank, the secondary precipitation tank, the coagulation reaction tank and the inclined pipe precipitation tank, the V-shaped gas stripping reflux two-stage precipitation integrated sewage treatment tank of the present invention has advantages of low investment, small occupation area, less agent consumption, less sludge discharge, low energy consumption, low cost, stable and controllable water quality, easy operation and management, and the like.
Description
Technical field
What the present invention relates to is a kind of integrated sewage water treating pond, particularly utilize simultaneously air lift principle and two-stage precipitation principle, utilize the ingenious structure of both sides, V-arrangement partition wall up and down spatial complementary, realize the treatment tank of high efficiency denitrogenation dephosphorizing function and integrated compact design.
Background technology
Conventional sewage water treatment method is take biochemical process as main, i.e. activated sludge process and the large class of biomembrance process two, and wherein activated sludge process is the most widely used a kind of two stage biological treatment process in present countries in the world.Previous Activated Sludge Process is mainly to remove organic pollutant, enters into comprehensively and should remove organic pollutant at present, again the operation stage of denitrogenation dephosphorizing.Activated sludge process denitrification dephosphorization technique principle is all substantially similar, but manifestation has multiple, and at present commonly used have A/A/O technique, UCT technique, modified form Carrousel (Carrousel) oxidation ditch process, AB method technique, SBR technique, CAST technique, Unitank technique, MBR technique, a MSBR technique etc.Conventional activated sludge method technique mostly first will be through pre-treatment or/and the coagulation of primary sedimentation pond precipitation, then enter aeration tank and carry out secondary biochemical treatment, enter afterwards secondary sedimentation basins and carry out mud-water separation, clear water sterilization discharging, precipitating sludge is got back in aeration tank and is recycled by reflux pump, and small part mud carries out thickening as excess sludge to be disposed.
Above-mentioned very complicated common process, also will add the denitrogenation dephosphorizing function, thereby the overall craft complex that becomes, and flow process is longer, processes structures more.In view of present stage and sewage disposal from now on require more and more higher to effluent quality, and the sewage work of 10,000～100,000 ton per day scales is because of the scale effect problem, and the problems such as project investment, running cost and the restriction of land used index, and be not suitable for continue extending technical process, therefore the technique way of " Rubis Class Nuclear Attack Submarine " is not good method, therefore, in the urgent need to searching out the activated sludge process denitrogenation dephosphorizing new process that is fit to 10,000～100,000 ton per day scales, to adapt to the needs of the novel Urbanization Construction of China.
Recent years, China's small-scale activated sludge process denitrogenation dephosphorizing novel process has AO diatomite technique, double-face flow-guiding Hydraulic Circulation clarification process, IBR Continuous Flow rhythmic reaction technique etc., but these techniques or be difficult to be amplified to 10,000～100,000 ton per day scales, after amplifying, effluent quality is difficult to stably reaching standard, uneconomical practicality and increased the operational management difficulty after amplifying, after perhaps amplifying, land used efficiency greatly descends, construction cost significantly increases.In a word, the sewage treatment area innovation goes out safe reliable, advanced, novel process that can be applied to big-and-middle-sized sewage disposal, is a long-term difficult task.
patent of invention " Double-side diversion biological sewage disposal technology and sewage disposal device thereof " (publication number CN 1223972A, open day 1999.7.28), its equipment is by dashpot, aeration tank, the compositions such as settling bowl, this equipment is darker cone bucket shape, width ratio is not enough, limit by structural shape and cone bottom sloping, not only can not be amplified to the small-scale commonly used of 100～10000 ton per days, more than more can't being amplified to 10,000 ton per days, moreover this technology and equipment can only be removed organic pollutant and ammonia nitrogen, its operation logic determined can't denitrogenation (total nitrogen) more can't dephosphorization, its effluent quality nitrogen phosphorus index does not meet the existing discharging standards of China, cause rather than sewage denitrification and dephosphorization equipment.
Patent of invention " double-face flow-guiding sewage treatment pool of forced refluence " (application number ZL200610125119.7), medicament addition device is not established in this pond, and biological phosphate-eliminating and chemical dephosphorization insufficiency of function need to add medicament in follow-up workshop section and carry out chemical dephosphorization; This pond water outlet is not as clear as crystal, thereby is provided with filtering layer at this pond end and further filters, however filtering layer will soon stop up when operation,, but without the filtering layer back-purge system, therefore can't remove and stop up and be difficult to normal operation; In addition, mud extraction tube suction spoil disposal is adopted in this pond, thereby energy consumption is high and sludge discharge effects is poor, unavoidably occurs the deposition problem at the bottom of pond.There are many defects in this pond, can not meet sewerage integrated processing actual needs, uses as a unit in the longer flow process of non-integral after can only revising.
Application for a patent for invention " a kind of sewage biochemical treatment integrated apparatus, system and processing method " (publication number CN 102923908A, open day 2013.2.13), the small-scale sewage denitrogenation dephosphorizing needs that substantially can adapt to 1500 ton per days and following scale, but more than this device is difficult to continue to be amplified to 1600 ton per days, more than more can't being amplified to 10,000 ton per days, and Nitrogen/Phosphorus Removal needs further to improve.Major cause is after this device continues to amplify, oblique diaphragm will be further upward to prolongation, cause the power of the mud shortage horizontal direction of distant place more to come near being difficult to arrive vertical air lift reflux assembly, there will be mud that sludge reflux brings the not in time problems such as floating, anaerobic gas generation floating or dead corruption floating that lose activity, then have a strong impact on effluent quality; Simultaneously, this device makes vertical air lift reflux assembly one side because volume is little be all the aeration biochemical district, there is no to utilize the preposition anoxic denitrification district of sewage self carbon source, more there is no integrated anaerobic zone, can only rely on the anoxic denitrification of the inner anoxic denitrification of granule sludge and the shortage carbon source of vertical air lift reflux assembly opposite side postposition, thereby denitrification effect and phosphor-removing effect also has the space of further lifting; In addition, the medicament flocculation reaction of precipitation assembly below is insufficient inhomogeneous, makes dosing more, water distribution deleterious after scale is amplified, thereby phosphor-removing effect also has with other amounts of residual contamination do removal effect the space that further promotes.
Summary of the invention
The object of the invention is to propose a kind of simple and effective, can meet denitrogenation dephosphorizing and require integrated sewage water treating pond with all other water-quality guideline stably reaching standards, in order to be widely used in the V-type stripping reflux two-stage precipitation integral treatment tank of 10,000～100,000 ton per day scales.
The present invention realizes above-mentioned purpose like this: by set up anaerobic zone and oxygen-starved area before aeration zone, by V-arrangement clarification recirculating zone is set at the aeration zone end, and the top position, middle part arranges the active sludge face formula air lift microkinetic return channel of level in the V-arrangement district, by the inclined tube in the second stage/plate settling region lower floor, L-type waterpower is set and has mixed spigot, mixed the spigot upper entrance in L-type waterpower and added medicament, coordinated low dissolved axygen aeration and compound diatom local medicine agent mud total reflux and realize smoothly above-mentioned purpose.
V-type stripping reflux two-stage precipitation integral treatment tank of the present invention, comprise the rectangle form pool body, is divided into successively anaerobic zone, oxygen-starved area, aeration zone, V-arrangement clarification recirculating zone and inclined tube/plate settling region in described rectangle form pool body; Water surface place, vertical partition wall top between oxygen-starved area and aeration zone has return port, and the backflow area of described return port is greater than the forward flowing hole area of this partition wall bottom; Described return port both sides are respectively equipped with umbrella shape agitator in oxygen-starved area and the auxiliary impeller in aeration zone, purge and assist under the acting in conjunction of impeller top layer propelling at described return port, umbrella shape agitator bottom, reflux in the upper strata that the gas stripping that adds upper storage reservoir pucking wind aerating apparatus bubble upwelling, the acting in conjunction of two aspects form from the aeration zone to the oxygen-starved area; Partition wall middle part lower position between aeration zone and V-arrangement clarification recirculating zone is provided with faces upward oblique porous air water separator; The top position, middle part is provided with face formula air lift microkinetic return channel in V-arrangement clarification recirculating zone; Be provided with L-type waterpower and mixed spigot below inclined tube/plate settling region.
Described auxiliary impeller is arranged under the topmost surface of aeration zone, and its plug-flow direction is towards the return port on vertical partition wall top.
Describedly face upward oblique porous air water separator for facing upward oblique installation under water, guarantee the pond, aeration zone at the bottom of the aeration bubble with current, do not enter in V-arrangement clarification recirculating zone.This air water separator is to utilize the bubble upflow velocity to consist of the easy tripping device of bubbles escape some blocks of interconnective plates higher than realizing to flow velocity under current.Specifically comprise the rising flow guiding inclined plate parallel or substantially parallel with facing upward oblique partition wall and the rectangle housing that perpendicular both sides panel surrounds with facing upward oblique partition wall, be provided with the bucking ladder concordant with outer frame bottom in described rectangle housing, side panel bottom outside the described bucking ladder left and right sides is provided with the isolation swash plate, is equipped with the V-arrangement opening between described bucking ladder and two isolation swash plates; Described side panel inwall middle part is to having the heavy mud plate of symmetrical oblique water conservancy diversion, and the heavy mud plate of oblique water conservancy diversion is positioned at the oblique upper of bucking ladder; Offer venting hole on described side panel, described venting hole is positioned at side panel and below, the heavy mud plate junction of oblique water conservancy diversion.
Described formula air lift microkinetic return channel, utilize sewage work's gas blower compressed air gas source, and the suspension that V-arrangement is clarified in recirculating zone is back to the aeration zone recycling with concentrating the active sludge general equilibrium.The airtight casing of suction pipe, surrounding, air nozzle, standpipe elbow, backflow inclined tube, backflow wall pipe and the pond external compression air control unit that specifically comprise inlet pipe, termination sealing; The suction pipe of described termination sealing is UNICOM in length and breadth and arranges, and the suction pipe of each termination sealing is positioned at same level, is uniformly distributed a plurality of mud apertures that advance on the suction pipe of each termination sealing; The whole medium position of the suction pipe that seals in termination is provided with the airtight casing of surrounding, establishes the single or multiple air nozzles that are connected with inlet pipe in the airtight casing of surrounding, and an end of the airtight casing of surrounding top and standpipe elbow is connected; The other end of described standpipe elbow is connected with backflow inclined tube and backflow wall pipe successively, at the bottom of the outlet pipe of described backflow wall pipe a little less than the water surface or and water surface hold the line; Described pond external compression air control unit and inlet pipe are connected.
The spout that described L-type waterpower has been mixed spigot is horizontal direction, and spout is positioned at middle part or the bottom of inclined tube/below, plate settling region suspended sludge layer.It is to utilize spray waterpower mixing effect, inner perforated plate waterpower mixing effect, the effect of inner tubular type static mixing and last nozzle ejection waterpower to mix that waterpower has been mixed spigot, thereby reach water and the quick well-mixed purpose of medicament and suspended sludge layer slow circumvolve, realizes the function of contact flocculation.Specifically comprise water-in standpipe, diversion box and attached wall inclined tube, described water-in standpipe is connected with attached wall inclined tube with the horizontal pipeline section on both sides respectively successively after the diversion box shunting, attached wall inclined tube is connected again and with the L shaped bend pipe of reducing nozzle, and described two L shaped bend pipes are asymmetric arrangement.Establish double-deck perforation plate in described diversion box, the setting of staggering of the aperture of double-deck perforation plate.Establish 1～3 grade of spiral stator blades in described attached wall inclined tube, every grade of stator blades by 1～3 mutual overlap joint and spatial vertical forms, and current generation spiral is advanced; Keep certain distance between adjacent level spiral stator blades.The reducing nozzle of described two L shaped bend pipe ends is positioned on same horizontal plane also separated by a distance, and the emission direction of two reducing nozzles is 90 ° vertically.
Engineering reliability of the present invention and originality mainly embody a concentrated reflection of following three aspects:
At first, before aeration zone " stretching " hew out two spaces, as the anaerobic zone in integrated pond and preposition oxygen-starved area.From the aeration aerobic zone with the nitrification liquid of bubble upwelling mode stripping reflux to preposition oxygen-starved area; just entered the contained organic carbon source of sewage in oxygen-starved area by the denitrifying bacteria utilization in the high concentration particle active sludge and carried out the denitrification denitrogenation biochemical reaction under anaerobic environment; realize sufficient biological denitrificaion and biochemical oxygen demand (BOD) (BOD), chemical oxygen demand (COD) (COD) pollutent Partial digestion, obtain further strengthened denitrification effect.When low temperature or seasonal influent ammonia nitrogen total nitrogen obviously exceed design load in the winter time, open the auxiliary impeller that is positioned at the upper strata, aeration zone, guarantee that the high density nitrification liquid is back to smoothly preposition oxygen-starved area and completes the denitrification denitrogenation reaction.At anaerobic zone foremost, polyP bacteria fully discharges phosphorus and is fully to absorb phosphorus under follow-up aerobic environment to lay a solid foundation under anaerobic environment, be beneficial to follow-up aerobic treatment and realize smoothly biological phosphorus removal functional, reduced chemical dephosphorization medicament usage quantity, reduced the generation of chemical sludge.
second, utilize the vertical rectangular space of V-arrangement of original creation as clarification recirculating zone and bottom sludge discharging area, the face formula air lift microkinetic return channel of installation level is creatively proposed first in this top position, middle part, district, make the active sludge of clarified separation reflux without omitting ground in the horizontal direction comprehensively, can either solve the large capacity settling pond clarification sludge reflux inhomogeneous variety of issue that brings not in time, can not destroy the flco structure and activity of active sludge again, because do not exist conventional sludge reflux pump quick runner " to smash " problem of flco, and the quantity of reflux size is that return sludge ratio can pass through adjusting range formula air lift microkinetic return channel air demand size and rapid and simple control, coordinate the backflow utilization of excess sludge discharge control and follow-up compound diatom local medicine agent mud, through stripping reflux circulation repeatedly, realize that the bio-reaction zone sludge concentration is controlled in 3～9 g/L scopes, adopt than low dissolved axygen and control under the running status of aeration in this aeration zone, utilize granule sludge to realize sufficient nitration reaction and anti-nitration reaction, thereby reach the purpose of efficient denitrification.
The vertical rectangular space of above-mentioned V-arrangement is that V-arrangement clarification recirculating zone and bottom sludge discharging area are a space integral body, is that the present invention is at a professional innovative point, not only simply but also practical.compare the single water conservancy diversion inclined-plane in patent of invention " double-face flow-guiding sewage treatment pool of forced refluence " (application number is ZL200610125119.7), and application for a patent for invention " a kind of sewage biochemical treatment integrated apparatus, system and processing method " (publication number CN 102923908A, open day 2013.2.13) the single oblique diaphragm in, on it, mud of deposition is in gravity landing process, below the slit place all the ascending current jacking can occur and glide not smooth, easily cause the mud problem such as corruption floating etc. that loses activity, and the present invention adopts V-arrangement bottom bucket structure first, coordinate side to intake in the certain altitude position, fundamentally solved the jacking problem, thereby in the vertical rectangular space of above-mentioned V-arrangement V-arrangement bottom bucket to compare with similar integrated pond be another innovative point and practical point in the engineering application.
The 3rd, utilize the high collaborative removal that ensures dephosphorization and other amounts of residual contamination do of sewage after two-stage depositing technology in same pond is realized biochemical treatment.V-arrangement clarification recirculating zone in the first step, muddy water mixed solution after biochemical treatment relies on action of gravity to realize mud-water separation for the first time in this district fully, after separating clear liquor through first step water leg enter the second stage inclined tube/the plate settling region carries out dosing chemical dephosphorization and co-coagulation precipitation process.Creatively be provided with again L-type waterpower in inclined tube/plate settling region the present invention of lower floor and mixed spigot, mix spigot upper entrance place in L-type waterpower and added medicament, sufficient contact flocculation reaction occurs then and precipitate at hydraulic action low suspension sludge blanket slow circumvolve, remaining fine particle pollutent in the inclined tube/plate in middle layer further precipitation remove, thereby realize total phosphorus (TP) and all other water-quality guideline such as suspended substance (SS), five-day BOD (BOD
5), the purpose of the stably reaching standard such as chemical oxygen demand (COD) (COD).
Working process of the present invention is such.Usually, big-and-middle-sized scale sewage underground coarse rack debris retaining, sewage pump promote through being positioned at, the fine fack on ground after the pre-treatment such as debris retaining and settling pit sand setting, just enters this integrated pond again.At first sewage enter anaerobic zone, have in anaerobic zone with sewage pump and promote together and the two-stage precipitation returned sluge that comes, under the agitator effect, be in anaerobion and polyP bacteria and the pollutent generation anaerobic biochemical reaction of suspended state, realize pollutent Partial digestion and biological phosphate-eliminating preprocessing function.Afterwards, sewage enters preposition oxygen-starved area and carries out biochemical treatment.Vertical umbrella shape agitator is installed in oxygen-starved area, both prevented sludgd deposition, make again nitrification liquid, active sludge and sewage three fully mix, the more important thing is and can work in coordination with oxygen-starved area and the iterative cycles exchange on vertically of aeration zone mixed solution, saved nitrification liquid internal reflux pump, denitrifying bacteria utilizes carbon source in sewage to complete rapidly and efficiently denitrification reaction in oxygen-starved area, and nitrification liquid is from follow-up aeration zone.Then sewage enter into aeration zone and carry out aerobic treatment under overall plug-flow effect, further complete organic pollutant degradation under the active sludge microorganism effect, ammonification is nitrated and biological phosphate-eliminating.Nitration reaction product nitrification liquid under the gas stripping of bubble upwelling, carries out again the denitrification denitrogenation reaction from the upper strata automatic back flow to oxygen-starved area, finally generate N
2Spill into atmosphere, like this iterative cycles, realize the purpose of abundant denitrogenation, contaminant degradation and the biological phosphate-eliminating of sewage.Subsequently, muddy water gas three-phase mixture after facing upward oblique porous air water separator, only has muddy water mixed solution to enter V-arrangement clarification recirculating zone and carries out mud, water natural separation.Supernatant liquid overflows through first step water leg; The face formula air lift microkinetic return channel that middle level clarification active sludge is installed through level is back to aeration zone and oxygen-starved area, is again that iterative cycles like this obtains the high concentration particle active sludge; The active poor mud of bottom is discharged by the excess sludge pipe, realizes the biological phosphate-eliminating rich phosphorous sludge is got rid of from system purpose.The clear liquor that passes through first step nature clarifying treatment enters the inclined tube of the second stage/plate settling region, by the dosing of medicament spray equipment, carries out chemical dephosphorization and co-coagulation precipitation process.Mixed in L-type waterpower under the hydraulic action of spigot, sufficient contact flocculation reaction occurs and precipitates in suspended sludge layer slow circumvolve then, remaining fine particle pollutent will be in the inclined tube in middle layer/plate precipitation assembly further precipitation remove, clear water after precipitation spills into the clear water canal from second stage water leg, finally by qualified discharge after sterilization.
V-type stripping reflux two-stage precipitation integral treatment tank of the present invention has following five remarkable technical superioritys:
The one, function division is clear and definite: it is clear and definite that 5 major functions of integrated pond are distinguished work---anaerobic zone, oxygen-starved area, aeration zone, V-arrangement clarification recirculating zone, settling region.Anaerobic zone (Anaerobic) coordinates follow-up aeration zone (Oxic) to realize biological phosphorus removal functional; Preposition oxygen-starved area is realized denitrification denitrogenation and is not needed additional carbon; The aerobic aeration district is most important main body, completes that ammonification is nitrated, contaminant degradation and part biological dephosphorization; The muddy water natural separation of the first step is realized in V-arrangement clarification recirculating zone, supernatant liquid enters next procedure, middle level clarification mud air lift is back to aeration zone and high concentration particle active sludge operating mode is realized in oxygen-starved area, and bottom mud is back to the inlet water lifting pumps room as excess sludge discharge and a part; The inclined tube of the second stage/plate settling region is under the dosing coagulation, play the collaborative effect of making a final check up to standard of chemical dephosphorization and all other water-quality guideline, if adopt the agent of compound diatom local medicine precipitating sludge can all be back to forebay, inlet water lifting pumps room and recycle in biochemical treatment tank.5 large functional zone are melted in 1 integrated pond of the present invention, have obviously improved sewage treating efficiency, and have saved land used, have saved construction costs, have facilitated operational management.
The 2nd, the face formula air lift microkinetic return channel that level is installed is better than sludge reflux pump comprehensively: 1. face formula air lift microkinetic return channel suction pipe horizontal interval Man Pu is installed on top position, middle part, V-arrangement clarification recirculating zone, non-blind area is without dead angle, reflux balanced, the backflow route is short, returned sluge concentration is high, and quantity of reflux can intuitively regulate and control by air demand; 2. the stripping reflux energy consumption is low, belongs to microkinetic and refluxes, and according to relevant experimental data, shows, the energy-conservation 65%(of the electronic reflux pump of stripping reflux energy loss-rate annotates:, at air lift depth of immersion 2.4m, during air lift lift height 0.6m, reach 0.38m
3The air lift flow of/min, impeller pump needs 1.60kW, the gas blower wasted work of air-lift device conversion is 0.56kW only); 3. stripping reflux belongs to gentle reflux, without the impeller high-speed motion, active sludge flco structure can not be crashed to pieces, mud is after the multi-reflow circulation, floc particle collides repeatedly and intensity is unlikely to breakage of particles, the closely knit aerobic particle mud of final formation, the seed activity mud of high density is realized synchronous nitration and denitrification in biochemical reaction zone, increased substantially nitric efficiency; 4. face formula air lift microkinetic return channel in pond without motor or mechanical movable part, not fragile, reliable and stable.
the 3rd, the mud-water separation of V-arrangement clarification recirculating zone does not consume energy, need not dosing, efficiency is high: this V-arrangement settling section is different from circulatior clarifier, the present invention need not to provide hydrojet, only with the original creation v-shaped structure and can realize mud-water separation by action of gravity, its principle is that muddy water mixed solution is in traveling process from bottom to top, variable cross-section water body upflow velocity slows down gradually, reach balance in certain height location current lift velocity and granule sludge sinking velocity, this height location will form the active sludge suspended layer automatically, utilize filtration and the net of active sludge layer to catch interception function, reach good mud-water separation effect.Therefore, before clarification mixed solution suspended substance (MLSS) concentration be 3000～9000 mg/L or more than, after clarification, clear liquor suspended substance (SS) concentration drops to below 100 mg/L even 20mg/L, clarifying efficiency reaches more than 97%.
The 4th, the chemical feeding quantity small band is carried out series of advantages: 1. owing to only needing that the clear liquor of suspended substance (SS) concentration below 100 mg/L carried out dosing, thereby added amount of chemical is little, medicine consumption cost is low, be different from general secondary biochemical technique fully in biochemistry pool or dosing is carried out to the mixed solution of 3000～4500mg/L left and right in the second pond ingress, concentration higher position chemical feeding quantity is large, and cost is high; 2. the active sludge because of stripping reflux does not just have dosing at all, does not just have the inhibitory effect problem of medicament to the biochemistry pool active sludge; 3. the chemical sludge amount that produces is little, thereby does not increase follow-up sludge treatment difficulty, and reason is that the chemical sludge water ratio is high, and is more difficult; , even medicament mud of the present invention all is back to biochemical treatment system, add that because total amount is little timely discharging excess sludge does not affect biological activity substantially yet; 4. the present invention can be with compound diatom local medicine agent chemical flocculation precipitation mud fully recovering to Biochemistry Reaction System, the amounts of residual contamination do that absorbs in medicament mud is removed through biochemical reaction, the chemical dephosphorization throw out is together with the rich phosphorus thalline of biological phosphate-eliminating mud, clarify the recirculating zone bottom by V-arrangement finally and discharge system with the excess sludge form, thereby the water ratio of mud is able to remarkable reduction, removed the sorrow of independent chemical sludge thickening.
The 5th, need not to arrange separately specially needs extra the occupation of land and complicated coagulation workshop section.The present invention is provided with L-type waterpower in inclined tube/plate settling region lower floor and has mixed spigot, utilize medicament spray equipment and hydraulic action confection, and make suspended sludge layer slow circumvolve and spiral rise under hydraulic action, sufficient contact flocculation reaction occurs then and precipitate, remaining fine particle pollutent will further precipitate removal in the inclined tube/plate in middle layer, thereby will realize total phosphorus (TP) and all other water-quality guideline such as suspended substance (SS), five-day BOD (BOD
5), the purpose of the stably reaching standard such as chemical oxygen demand (COD) (COD).It is simple, practical, effective that L-type waterpower has been mixed spigot, utilizes the contact flocculation principle to reduce the medicine consumption, reduced chemical mud amount.Simultaneously, in the two-stage settling region, L-type waterpower has been mixed spigot and whole mud discharging device, and equal machinery-free movable part under water, without motor-driven, without devices such as sludge pump or mud scrapers, not only energy-efficient in pond, and without maintenance capacity, use cost is low, and operational administrative is simplified, and construction investment is low.
The 2 innovation ground, places that focus on of the present invention have utilized the air lift principle: the 1st, and the face formula air lift microkinetic return channel that level completely spreads installation will be clarified in recirculating zone and clarify active sludge and be back to equably biochemical reaction zone continuously, comprehensively; The 2nd, the nitrification liquid that in aeration zone, biochemical reaction produces, under the gas stripping of pond pucking wind aerating apparatus bubble upwelling, carry out the denitrification denitrogenation reaction from upper strata liquid level automatic back flow to preposition oxygen-starved area.The former makes system obtain the high concentration particle active sludge, significantly improves system treatment rate and nitric efficiency, and the electronic reflux pump of stripping reflux energy loss-rate is energy-conservation obviously, and does not destroy granule sludge flco structure; The latter simplifies and has saved nitrated mixed solution internal reflux pump,, by the air lift buoyancy of blast aeration itself, does not need extra backflow energy consumption.
Another one of the present invention focuses on the ingenious two-stage precipitation principle of having utilized: the two-stage precipitation is separated by the V-arrangement partition wall of the present invention's original creation, the mud-water separation of the first step does not consume energy, not dosing, efficiency is high, reach more than 97%, stripping reflux is not affected by the restraining effect of medicament to the active sludge of biochemical zone: the precipitation of the second stage is only the clear liquor of suspended substance (SS) concentration below 100 mg/L to be carried out dosing, thereby added amount of chemical is little, medicine consumption cost is low, the chemical sludge amount that produces is little, does not increase follow-up sludge treatment difficulty.After the two-stage precipitation process, effluent quality is more secure, only needs by adjusting added amount of chemical and pharmacy variety, just can guarantee efficiently collaborative removal of efficient dephosphorization and other amounts of residual contamination do, ensures that final water conditioning is up to standard.
V-type stripping reflux two-stage precipitation integral treatment tank of the present invention has 3 beneficial effects the most obvious:
The firstth, nitric efficiency is high: under gas stripping, sewage and active sludge iterative cycles under anoxic/aerobic environment is processed, and active sludge is in the repeatedly stripping reflux circulation of settling section/biochemical zone, the aerobic particle mud that final formation particle diameter is large, density is high, sewage is under macroscopical anoxic and two kinds of anoxic conditions of microcosmic anoxic, utilize nitrifier and denitrifying bacteria in granule sludge, realize high efficiency aerobic nitrification reaction and two-forty anoxic denitrification denitrification reaction, the denitrogenation flow process is short, power consumption is few, ammonia nitrogen (NH
3-N) and the denitrification effect of total nitrogen (TN) good, particularly water outlet total nitrogen (TN) is easier to up to standard than other techniques;
The secondth, dephosphorization is thorough: be aided with chemical dephosphorization on the basis of A/O biological phosphate-eliminating.The excessively picked-up under the oxygen supply effect of aeration zone of polyP bacteria (PAB) microorganism surpasses the phosphorus of its physiological requirements, and pollutent obtains aerobic degradation simultaneously, and the rich phosphorous sludge of generation is realized dephosphorization with excess sludge form discharge system.When sewage phosphorus concentration is higher while surpassing the biological phosphate-eliminating limit, namely with chemical precipitation method, carry out the chemical dephosphorization aftertreatment, through this integrated pond lower concentration clear liquor is carried out dosing, the slow eddy flow that has mixed the spigot generation by L-type waterpower carries out contact flocculation and inclined tube/plate precipitation, total phosphorus (TP) and other amounts of residual contamination do such as five-day BOD (BOD
5), the index such as chemical oxygen demand (COD) (COD), suspended substance (SS) is all with whole stably reaching standards.The two-stage precipitator method are supplementary means of the present invention and last Means of Ensuring.
The 3rd is the engineering technological economy remarkable benefit: the present invention utilizes V-shaped configuration and air lift principle with ingenious being melted into a whole in sewage disposal five functional district, obviously improved the technical economic benefit of 1～100,000 ton per day scale sewage denitrification and dephosphorization, no longer need to disperse to build the pond structures such as second pond, internal reflux pump pond, mud external reflux pump pond and advanced treatment coagulative precipitation tank, not only obviously saved investment, save land used, and facilitated operational management.
Above-mentioned every advantage fully shows, V-type stripping reflux two-stage precipitation integral treatment tank of the present invention, obviously shortened sewage disposal denitrification dephosphorization technique flow process, compare with techniques such as conventional A/A/O technique or modified form Carrousel (Carrousel) oxidation ditches, not only denitrogenation dephosphorizing efficiency is high, water conditioning is up to standard secure, and features simple structure is compact, take up an area that scalp is economized, the few spoil disposal of medicine consumption is few, energy consumption low-cost low, operational administrative is simple, be adapted at China city and town sewage and process widespread use in the novel Urbanization Construction of neutralization.
Description of drawings
Fig. 1 is the FB(flow block) of V-type stripping reflux two-stage precipitation integral treatment tank of the present invention.
Fig. 2 is the structural representation of V-type stripping reflux two-stage precipitation integral treatment tank of the present invention.
Fig. 3 is the floor map of V-type stripping reflux two-stage precipitation integral treatment tank of the present invention.
Fig. 4 is the return port distribution schematic diagram at water surface place, V-type treatment tank partition wall of the present invention top.
Fig. 5 is the present invention's perspective view of facing upward oblique porous air water separator used.
Fig. 6 is the present invention's overall assembling schematic diagram of facing upward oblique porous air water separator used.
Fig. 7 is the present invention's cross-sectional view of facing of facing upward oblique porous air water separator used.
Fig. 8 is the present invention's vertical view of facing upward oblique porous air water separator used.
Fig. 9 is the sectional view of used formula air lift microkinetic return channel of the present invention.
Figure 10 is the three-dimensional pipeline schematic diagram of used formula air lift microkinetic return channel of the present invention.
Figure 11 is the vertical view of used formula air lift microkinetic return channel of the present invention.
Figure 12 is the cross-sectional view that the present invention's L-type waterpower used has been mixed spigot.
Figure 13 is the right view that the present invention's L-type waterpower used has been mixed spigot.
Figure 14 is the vertical view that the present invention's L-type waterpower used has been mixed spigot.
wherein: 1-V-type stripping reflux two-stage precipitation integral pond body, 2-anaerobic zone, 3-oxygen-starved area, 4-agitator, 5-aeration zone, 6-return port, 7-face upward oblique porous air water separator, 8-face formula air lift microkinetic return channel, 9-L-type waterpower has been mixed spigot, 10-aerating apparatus, 11-auxiliary impeller, 12-V-arrangement clarification recirculating zone, 13-1 grade of water leg, 14-excess sludge pipe, 15-residual sludge pump, 16-medicament spray equipment, 17-inclined tube/plate settling region, 18-suspension slime layer, 19-inclined tube/plate precipitation assembly, 20-reflux sludge tube, 21-2 grades of water legs, 22-tinted shade, 23-clear water canal,
71-rising flow guiding inclined plate, 72-side panel, the heavy mud plate of 73-venting hole, 74-oblique water conservancy diversion, 75-bucking ladder, 76-isolation swash plate, 77-deep floor, 78-mounting block, 79-partition wall are faced upward the inclined hole hole;
81-inlet pipe, 82-termination sealing suction pipe, the airtight casing of 83-surrounding, 84-air nozzle, 85-backflow standpipe, 86-backflow inclined tube, 87-backflow wall pipe, 88-pond external compression air control unit, 89-advance the mud aperture;
Double-deck perforation plate, 94 in 91-water-in, 92-diversion box, 93-case-attached wall inclined tube, 95-spiral stator blades, 96-L shaped bend pipe, 97-reducing nozzle, 98-strut member.
Embodiment
Embodiment one
Below contrast accompanying drawing, adopt V-type stripping reflux two-stage precipitation integral treatment tank of the present invention as embodiment in conjunction with state key basin Sewage Treatment Project simultaneously, the present invention will be further described.
As shown in the FB(flow block) of Fig. 1, the technical process of V-type stripping reflux two-stage precipitation integral treatment tank of the present invention is simple and direct smooth and easy, realize denitrogenation dephosphorizing in same pond, reach " urban wastewater treatment firm pollutant emission standard " that this basin requires (GB18918-2002) one-level A standard, and can steady running, system is not established the internal reflux pump, (the external reflux sludge concentration is high also not establish external reflux pump, sludge volume is little, directly using total water inlet sump pump promotes),, without mud scraper, simplified operational management.
As shown in the floor map of the structural representation of Fig. 2 and Fig. 3, V-type stripping reflux two-stage precipitation integral treatment tank of the present invention, see along sewage flow direction, V-type integrated pond body 1 is comprised of 5 functional zone: anaerobic zone 2, oxygen-starved area 3, aeration zone 5, V-arrangement clarification recirculating zone 12, inclined tube/plate settling region 17, water level successively from high to low.
The technical process of this treatment tank denitrogenation dephosphorizing is described as follows:
1, anaerobic zone 2: sewage is after the pre-treatment such as grid debris retaining and settling pit sand setting, at first enter anaerobic zone 2, have in this district with sewage pump and promote together and the two-stage precipitation returned sluge that comes, under the agitator effect, be in anaerobion and polyP bacteria and the pollutent generation anaerobic biochemical reaction of suspended state, realize pollutent Partial digestion and biological phosphate-eliminating preprocessing function.
2, oxygen-starved area 3: sewage is 3 aerations not in oxygen-starved area, and the umbrella shape agitator 4 of installing in this district has the effect of bottom purging and upper strata to entrainment effect, are conducive to the mixed solution exchange of oxygen-starved area 3 and aeration zone 5.In this district, denitrifying bacteria is used to carbon source in the sewage of anaerobic zone 2 and completes rapidly and efficiently denitrification reaction, and nitrification liquid is from follow-up aeration zone 5.During low temperature or seasonal influent ammonia nitrogen total nitrogen while obviously exceeding design load, open the auxiliary impeller 11 that is positioned at the upper strata, aeration zone in the winter time, guarantee that aeration zone 5 nitrification liquids are back to smoothly preposition oxygen-starved area 3 and complete the denitrification denitrogenation reaction.In addition, winter low temperature usually strengthens the biological reaction tank activated sludge concentration by reducing spoil disposal, and during low temperature, viscosity increases, and when concentration strengthens, viscosity also increases, this moment, the high viscosity nitrification liquid may need regularly to open auxiliary impeller 11, realized provisional forced refluence.
3, aeration zone 5: sewage enters into successively aeration zone 5 and carries out aerobic treatment under the plug-flow effect, completes organic pollutant degradation under the active sludge microorganism effect, ammonification is nitrated and biological phosphate-eliminating.Nitration reaction product nitrification liquid under the gas stripping of aerating apparatus 10 blast aeration bubble upwellings, 3 carries out denitrification denitrogenation reaction from the upper strata automatic back flow to oxygen-starved area again, finally generates nitrogen (N
2) spilling into atmosphere, iterative cycles like this, realize the purpose of abundant denitrogenation, contaminant degradation and most of dephosphorization of sewage.
4, V-type clarification recirculating zone 12: muddy water gas three-phase mixture is after facing upward oblique porous air water separator 7, muddy water mixed solution enters into V-arrangement clarification recirculating zone 12 and carries out mud, water natural separation, V-arrangement clarification recirculating zone 12 does not allow to bring bubble into current, in order to avoid affect clarification and effluent water quality.Supernatant liquid overflows through first step water leg 13; The face formula air lift microkinetic return channel 8 that middle level clarification active sludge is installed through level is back to aeration zone 5 and oxygen-starved area 3 from top, be again that iterative cycles like this obtains the high concentration particle active sludge; The active poor mud of bottom is discharged by excess sludge pipe 14, realizes mud such as mud, inertia mud and aging mud that biological phosphate-eliminating mud, subsequent chemistry come except phosphorus sludge and chemical flocculation sludge reflux are got rid of from system purpose.
5, inclined tube/plate settling region 17: the clear liquor of process first step nature clarifying treatment enters the inclined tube of the second stage/plate settling region 17, by 16 dosings of medicament spray equipment, carries out chemical dephosphorization and co-coagulation precipitation process.Mixed in L-type waterpower under the hydraulic action of spigot 9, sufficient contact flocculation reaction occurs and precipitates in suspended sludge layer 18 slow circumvolves then, remaining fine particle pollutent will be in the inclined tube in middle layer/plate precipitation assembly 19 further precipitation remove, the clear water after precipitation is collected clear water canal 23 from second stage water leg 21.The mud of suspended sludge layer 18 bottom depositions is promoted and is got back to the biochemical treatment system processing by the inlet water lifting pumps room by reflux sludge tube 20.For fear of the impact of algae on inclined tube, inclined tube/plate settling region Chi Ding arranges tinted shade 22.
Clear water canal 23 clear water disinfection apparatus in sewage work is disinfected, last qualified discharge.
In the present embodiment, sewage load is 1.2 ten thousand m
3/ d, except 2 each 6000m
3Outside the main body V-type stripping reflux two-stage precipitation integral treatment tank of/d, supporting 1 underground type inlet water lifting pumps room, (distribution, Root's blower, sludge dewatering equipment, chemicals feeder etc.) and 1 the small comprehensive building (office on duty, Central Control Room, laboratory, reference room, storehouse etc.) between 1 ground type integrated equipment of having also.Single seat integrated pond floor space 661m
2, Fig. 3 is single seat 6000m
3The floor map of the V-type stripping reflux two-stage precipitation integral treatment tank of/d.
The main technical details of this V-type stripping reflux two-stage precipitation integral treatment tank is as follows:
1. biochemical reaction zone, total hrt HRT=6.7 h; Available depth H water=5.3m;
Mixed solution MLSS concentration: X=6.0g/L, nitrification liquid internal reflux rate 100%～300%;
Sludge loading: Ls=0.084 kgBOD5/kgMLSSd, sludge age 20d;
Gas-water ratio (contains stripped backflow gas): 4: 1;
3 speed control by frequency variation Root's blowers, 2 use 1 are standby;
Maximum air demand 16.67 m of separate unit
3/ min, shaft power 24.4 kW;
2. clarify recirculating zone, the clarification residence time 2.0 h, available depth 4.0m;
Active sludge air lift internal reflux rate 33%～100%, clarification activated sludge concentration 24～12g/L;
Settling section bottom excess sludge water ratio: 96%～98 %;
3. tube settling district, inclined tube surface load 1.44 m
3/ m
2H;
Sedimentation time 3.15 h, available depth 4.20m, effluent weir flow rate＜1.2 L/sm;
The special-purpose inclined tube filler of sewage Φ=80mm, L=1m, H=877mm, 60 °, inclination angle, single lattice 173.6m
2
Compound diatomite modified water treatment agent dosage: 35mg/L;
The tube settling district does not establish scraping and sucking machine, bucket gravity spoil disposal;
Integrated sewage water treating pond water-in and water-out water quality table
| Project | COD | BOD 5 | SS | TN | NH 3-N | TP |
| Influent quality (mg/L) | 300 | 140 | 200 | 40 | 35 | 4 |
| Effluent quality (mg/L) | ≤50 | ≤10 | ≤10 | ≤15 | ≤5(8) | ≤0.5 |
| Processing efficiency (%) | ≥83.3 | ≥92.9 | ≥95.0 | ≥62.5 | ≥85.7(77.1) | ≥87.5 |
Sewage work's staffing 8 people, process every m
3The power consumption of sewage and medicine consumption priming cost adds up to 0.21 yuan, wherein the engineering unit direct investment of this V-type stripping reflux two-stage precipitation integral treatment tank be 944 yuan/tons day scale.Compare with the Sewage Treatment Project of other activated sludge process denitrification dephosphorization technique technology, the content of namely from the grid sand setting to sterilization, dispatching from the factory from comparable content, the present invention can save the direct construction investment about 30% of this part project content, the direct operating costs such as power consumption and medicine consumption can be saved 20% left and right, thereby technical economic benefit of the present invention is very significant.
Embodiment two
The new city sewage work that industry of certain Urban New District planning construction and sanitary sewage share, think that through sampling of water quality it is the sewage treatment process of leading and be aided with the materialization processing that bases fit adopts biochemical treatment, effluent quality requires to reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level B standard, select V-type stripping reflux two-stage precipitation integral treatment tank of the present invention, as sewage disposal main body structures, obtain good result.This new section planning sewage disposal total amount is 7.8 ten thousand m
3/ d, minute three phases build, and first phase is first built 2.6 ten thousand m
3/ d scale, i.e. 2 1.30 ten thousand m
3Outside the V-type stripping reflux two-stage precipitation integral treatment tank of/d, supporting 1 underground type coarse rack and the lift pump room of having also, 1 water quality accident emergency pond, 1 fine fack settling pit, 1 hydrolysis acidification pool, 1 seated connection touches sterilization pool and other affiliated facilities.The integrated pond single seat floor space 1376m of this main body
2, by each 6500m of 2 lattice
3The integrated pond of/d is also allied the communists wall and builds.In the situation that guarantee effluent quality, in order to simplify flow process, the present embodiment has deducted pond of the present invention type anaerobic zone foremost.
The main technical details of this V-type air lift integrated sewage water treating pond is as follows:
1. biochemical reaction zone:
Oxygen-starved area HRT=3h, aerobic zone HRT=4h; Available depth H
Water=6.0m;
Mixed solution MLSS concentration: X=6.0g/L, nitrification liquid internal reflux rate 100%～300%;
Sludge loading: Ls=0.063 kgBOD
5/ kgMLSSd, sludge age 20d;
Respectively establish 1 totally 4 vertical umbrella shape agitator in oxygen-starved area, N=4 kW;
Join double-speed motor (low speed 2.2 kW, 4 kW at full speed) with energy-conservation;
Gas-water ratio (contains stripped backflow gas): 4: 1;
Totally 3 of gas blowers, 2 use 1 are standby, all adopt the variable frequency regulating speed control air demand;
The separate unit blower air quantity is 36.2m
3/ min, N=75kW, pressure reduction 0.72bar;
2. clarify recirculating zone, clarification residence time 100min, available depth 4.0m;
Active sludge air lift internal reflux rate 33%～100%, clarification activated sludge concentration 24～12g/L;
Settling section bottom excess sludge water ratio: 96%～98 %;
3. tube settling district, inclined tube surface load 1.5 m
3/ m
2H;
Sedimentation time 2.7 h, available depth 4.00m, effluent weir flow rate＜1.2 L/sm;
The special-purpose inclined tube filler of sewage Φ=80mm, L=1m, H=877mm, 60 °, inclination angle;
Compound diatomite modified water treatment agent dosage: 30mg/L;
The tube settling district does not establish scraping and sucking machine, bucket gravity spoil disposal;
First phase (2.6 ten thousand m
3/ d) excess sludge dry weight: 3.92 t/d;
Integrated sewage water treating pond water-in and water-out water quality table
| Project | COD | BOD 5 | SS | TN | NH 3-N | TP |
| Influent quality (mg/L) | 350 | 110 | 250 | 42 | 33 | 3.5 |
| Effluent quality (mg/L) | ≤60 | ≤20 | ≤20 | ≤20 | ≤8(15) | ≤1.0 |
| Processing efficiency (%) | ≥82.9 | ≥81.8 | ≥92.0 | ≥52.4 | ≥75.8(54.5) | ≥71.4 |
Staffing 30 people of this new city sewage work, integrated pond is processed every m
3The power consumption of sewage and medicine consumption priming cost adds up to 0.20 yuan (do not contain sewage enter factory promote and the acidication power consumption), wherein the engineering unit direct investment of this V-type stripping reflux two-stage precipitation integral treatment tank be 905 yuan/tons day scale.Compare with the Sewage Treatment Project of other activated sludge process denitrification dephosphorization technique technology, namely from biochemistry pool, start to disinfecting steps content before from comparable content, the present invention can save the direct construction investment about 25%～30% of this part project content, the direct operating costs such as power consumption and medicine consumption can be saved more than 20%, thereby, technical economic benefit of the present invention and environmental benefit highly significant.
Can find out from above-described embodiment, V-type stripping reflux two-stage precipitation integral treatment tank of the present invention, the sewage work that is particularly suitable for China small and medium-sized cities 10,000～100,000 ton per day scales adopts, compare with other big-and-middle-sized activated sludge process denitrification dephosphorization techniques, not only denitrogenation dephosphorizing efficiency is higher, and water quality and water yield adaptability are wider, and stable water outlet is up to standard, and compacter province ground, power consumption medicine consumption is lower, and construction investment is more economized, and running cost is lower, mud discharging still less, is easier to operational administrative.
In addition, can find out from above two embodiment, V-type stripping reflux two-stage precipitation integral treatment tank of the present invention, not only can process sanitary sewage, and can process the combined sewage that industrial park can be biochemical, not only can reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level B standard, and be easy to directly reach one-level A standard and existing short flow process need not to extend, only need to adjust parameter when design or operation, at first guarantee that biological reaction tank TN index reaches one-level A requirement, need not to set up in addition the advanced treatment structures; Then choose appropriate parameter and adjust added amount of chemical on total phosphorus (TP) and suspended substance (SS) index, can reach easily one-level A standard.Therefore, the present invention compares with advanced treatment process with the activated sludge process denitrification dephosphorization technique of routine, has obtained beyond thought beneficial effect.
Claims (5)
1.V type stripping reflux two-stage precipitation integral treatment tank, comprise rectangle form pool body ⑴, be divided into anaerobic zone ⑵, oxygen-starved area ⑶, aeration zone ⑸, V-arrangement clarification recirculating zone ⑿ and inclined tube/plate settling region ⒄ in the body ⑴ of pond, it is characterized in that: the water surface place, vertical partition wall top between oxygen-starved area ⑶ and aeration zone ⑸ has return port ⑹, and the backflow area of described return port ⑹ is greater than the forward flowing hole area of this partition wall bottom; Described return port ⑹ both sides are respectively equipped with umbrella shape agitator and the interior auxiliary impeller ⑾ of aeration zone ⑸ in the ⑶ of oxygen-starved area; Partition wall middle part lower position between aeration zone ⑸ and V-arrangement clarification recirculating zone ⑿ is provided with faces upward oblique porous air water separator ⑺; The top position, middle part is provided with face formula air lift microkinetic return channel ⑻ in V-arrangement clarification recirculating zone ⑿; Be provided with L-type waterpower and mixed spigot ⑼ below inclined tube/plate settling region ⒄.
2. V-type stripping reflux two-stage precipitation integral treatment tank as claimed in claim 1 is characterized in that: have auxiliary impeller ⑾ at aeration zone ⑸ topmost surface, the plug-flow direction of described auxiliary impeller ⑾ is towards the return port ⑹ on vertical partition wall top.
3. V-type stripping reflux two-stage precipitation integral treatment tank as claimed in claim 1, it is characterized in that: describedly face upward oblique porous air water separator ⑺, comprise the rising flow guiding inclined plate (71) parallel or substantially parallel with facing upward oblique partition wall and the rectangle housing that perpendicular both sides panel (72) surrounds with facing upward oblique partition wall, be provided with the bucking ladder concordant with outer frame bottom (75) in described rectangle housing, side panel (72) bottom outside described bucking ladder (75) left and right sides is provided with isolation swash plate (76), is equipped with the V-arrangement opening between described bucking ladder (75) and two isolation swash plates (76); Described side panel (72) inwall middle part is to having the heavy mud plate (74) of symmetrical oblique water conservancy diversion, and the heavy mud plate (74) of oblique water conservancy diversion is positioned at the oblique upper of bucking ladder (75); Offer venting hole (73) on described side panel (72), described venting hole (73) is positioned at side panel (72) and below, heavy mud plate (74) junction of oblique water conservancy diversion.
4. V-type stripping reflux two-stage precipitation integral treatment tank as claimed in claim 1, it is characterized in that: described formula air lift microkinetic return channel ⑻ comprises suction pipe (82), the airtight casing of surrounding (83), air nozzle (84), standpipe elbow (85), backflow inclined tube (86), backflow wall pipe (87) and pond external compression air control unit (88) that inlet pipe (81), termination are sealed; The suction pipe (82) of described termination sealing is UNICOM in length and breadth and arranges, and the suction pipe (82) of each termination sealing is positioned at same level, is uniformly distributed a plurality of mud apertures (89) that advance on the suction pipe (82) of each termination sealing; The whole medium position of the suction pipe (82) that seals in termination is provided with the airtight casing of surrounding (83), establish the single or multiple air nozzles (84) that are connected with inlet pipe (81) in the airtight casing of surrounding (83), the airtight casing of surrounding (83) top is connected with an end of standpipe elbow (85); The other end of described standpipe elbow (85) is connected with backflow inclined tube (86) and backflow wall pipe (87) successively, at the bottom of the outlet pipe of described backflow wall pipe (87) a little less than the water surface or and water surface hold the line; Described pond external compression air control unit (88) and inlet pipe (81) are connected.
5. V-type stripping reflux two-stage precipitation integral treatment tank as claimed in claim 1, it is characterized in that: described L-type waterpower has been mixed spigot ⑼, comprise water-in (91), diversion box (92) and attached wall inclined tube (94), described water inlet pipe (91) respectively with two attached wall inclined tubes (94) after diversion box (92) shunting are connected, two attached wall inclined tubes (94) are connected respectively and with two L shaped bend pipes (96) of reducing nozzle (97), and described two L shaped bend pipes (96) are asymmetric arrangement.
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