CN205662397U - Useless pretreatment of water device - Google Patents

Useless pretreatment of water device Download PDF

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CN205662397U
CN205662397U CN201620524029.4U CN201620524029U CN205662397U CN 205662397 U CN205662397 U CN 205662397U CN 201620524029 U CN201620524029 U CN 201620524029U CN 205662397 U CN205662397 U CN 205662397U
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water
pretreatment device
sewage
highly dense
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张建飞
权秋红
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Henan Bestter Environmental Protection Technology Co Ltd
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Henan Bestter Environmental Protection Technology Co Ltd
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Abstract

The utility model relates to an useless pretreatment of water device, the device is including having high -density clarification tank and the sand filtration filter unit who thoughtlessly congeals unit, flocculation unit and deposit the clarification unit, wherein the coagulant is thrown and is located with the unit high -density clarification tank's entry, the coagulant is thrown the sewage that produces with the unit and is got into the flocculation unit, the sewage that the flocculation unit produced gets into deposit the clarification unit, the play water that deposits the clarification unit gets into sand filtration filter unit. The utility model discloses can effectively detach the impurity such as tiny granule, suspended solid, colloid of aquatic to reduce basicity and temporary hardness in the sewage, guarantee the safety and the economy of follow -up water.

Description

A kind of sewage pretreatment device
Technical field
This utility model relates to field of waste water treatment, particularly relates to a kind of sewage pretreatment device.
Background technology
High slat-containing wastewater refers to the waste water of total saliferous mass fraction >=1%, typically belongs to used water difficult to degradate.The most industrial dense Saline, its inorganic salinity containing high concentration and substantial amounts of refractory organic or noxious substance, if this type of waste water is not Treated it is directly discharged into natural water body, aqueous bio, Drinking Water and industrial and agricultural production water will necessarily be produced greatly Harm, will cause huge pressure to ecological environment.Processing method be broadly divided into biological treatment and physical chemistry Method.The most relatively common has distillation desalination process, absorption method, embrane method, reverse osmosis, bioanalysis etc..
Biological treatment is that current waste water processes one of most common method, and it has applied range, strong adaptability etc. Feature.But the inorganic salt in high saline sewage has stronger inhibitory action, the Organic substance root of high saline sewage to general microorganism Different according to production process, contained organic kind and chemical property differ greatly, but contained salts substances mostly is Cl-、SO4 2-、 Na+、Ca2+Deng salts substances.Although these ions are all nutrients necessary to growth of microorganism.If but these ions are dense Spend height, microorganism can be produced suppression and toxic action.To this end, the biological treatment of high saline sewage is generally at low salt concn Run under (salinity < 1%).Day however as water resource is becoming tight, the every regulation of water conservation of country's appearance and receipts The enforcement taken, the enterprise processed to high saline sewage brings burden, when salinity is more than 2g/L in sewage, uses bioanalysis Carry out high-salt sewage intractability bigger.
Physical-chemical process includes distilling desalination process, adsorption technology, film desalination process etc..Distillation desalination process be one the most ancient, The most frequently used desalination process, the way of distillation is allowed to explosive evaporation brackish water heating exactly, then steam is condensed into the process of fresh water. The advantage of the way of distillation is that simple in construction, processing ease, gained fresh water water quality are good etc..The way of distillation has a variety of, applies relatively broad Have: multiple-effect evaporation (MED), low temperature multiple-effect distillation (LT-MED), multistage flash evaporation (MSF) etc..Adsorption technology is to utilize adsorbent And the physics chemical action between pollutant be combined with each other, by pollutant removing from water.According to the difference of adsorption mechanism, can It is divided into physical absorption, chemisorbed and ion-exchange absorption attached, it is often the case that three kinds of mechanism occur simultaneously.Film desalination process is to utilize Permeable pressure head realizes the technology of desalination as motive force.Film desalination process mainly have reverse osmosis (RO), disc tube reverse osmosis (dt-ro) (DTRO), Membrane Materials (MD), just permeate (FO), electrodialysis (ED) etc..It is low that film desalination process has small investment, energy consumption, also is able to reach deep simultaneously Degree desalination purpose, producing water can be as recycle-water.Simple in construction, processing ease, gained fresh water water quality are good, but but there is investment The shortcomings such as costly, floor space is big, power consumption is high.
Utility model content
For the deficiency of prior art, this utility model provides a kind of sewage pretreatment device, it is characterised in that described Sewage pretreatment device at least includes: produce water tank, dosing unit, highly dense pond, pH value regulation unit, sand filtration unit and aerator; Wherein said product water tank is connected with described highly dense pond, and described highly dense pond is connected with sand filtration unit, described highly dense pond also with buffering/dense Contracting pond is connected, and described buffering/concentration basin is connected with regulating reservoir.
According to one preferred embodiment, described dosing unit is connected with described highly dense pond.
According to one preferred embodiment, described pH value regulation unit is connected with sand filtration unit.
According to one preferred embodiment, biochemical treatment unit is connected with described sewage pretreatment device, its mesophytization Processing unit includes: sewage collecting box, regulating reservoir, biochemical treatment tank BAF, Aeration fan, backwashing pump, product water tank;Described waste water Collecting box is connected with described regulating reservoir, and described regulating reservoir is connected with described biochemical treatment tank BAF, described biochemical treatment tank BAF with Product water tank is connected;Described Aeration fan is connected with biochemical treatment tank BAF with described backwashing pump.
According to one preferred embodiment, described sewage pretreatment device is connected with supertension membrane method unit, described super High pressure membrane method unit includes middle pressure RO unit, high pressure RO unit and supertension RO unit.
According to one preferred embodiment, the alkaline solution reserve tank of described pH value regulation unit is vertical square tube, institute State a height of 300 × 380 × 550mm of square tube length and width.
According to one preferred embodiment, described highly dense pond is cube shaped frame, its length and width are a height of 5800 × 1200 × 1800mm, wall thickness 10mm.
According to one preferred embodiment, described sand filtration unit is vertical type cylinder shape structure, its a diameter of 380mm, high Degree 380mm, wall thickness 10mm.
According to one preferred embodiment, water tank and described highly dense pond phase are produced described in described sewage pretreatment device Even, described highly dense pond is connected with described sand filtration unit, and described highly dense pond is also connected with buffering/concentration basin, described buffering/concentration basin It is connected with regulating reservoir;Described dosing unit is connected with described highly dense pond, and described pH value regulation unit is connected with described sand filtration unit.
This utility model simple in construction, processing ease, gained fresh water water quality are good, can effectively remove the fine particle in water, The impurity such as float, colloid, and reduce the basicity in sewage and temporary hardness, it is ensured that the safety of follow-up water and economy.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of water treatment facilities;
Fig. 2 is that BAF is to the clearance of COD, SS, ammonia nitrogen in former water;
Fig. 3 is highly dense pond Inlet and outlet water hardness and the change of hardness extrusion rate;
Fig. 4 is middle pressure feed water by reverse osmosis, produces water, the situation of change of dense water conductivity;
Fig. 5 is high pressure feed water by reverse osmosis, produces water, the situation of change of dense water conductivity;
Fig. 6 is supertension feed water by reverse osmosis, produces water, the situation of change of dense water conductivity;
Fig. 7 is the situation of change that supertension reverse osmosis concentrated water TDS leads;
Fig. 8 is the reverse osmosis units removal effect to COD.
Detailed description of the invention
It is described in detail below in conjunction with the accompanying drawings.As described in Figure 1, sewage pretreatment device produces water tank and highly dense pond phase Even, highly dense pond is connected with sand filtration unit, and described highly dense pond is also connected with buffering/concentration basin, described buffering/concentration basin and regulating reservoir It is connected;Described dosing unit is connected with described highly dense pond, and described pH value regulation unit is connected with sand filtration unit.
Wastewater treatment equipment includes being provided with the biochemical treatment unit of BAF, is provided with highly dense pond and sand filtration Pretreatment unit and be provided with middle pressure RO unit, high pressure RO unit and the supertension membrane method unit of supertension RO unit;Wherein give birth to Changing processing unit to be connected with pretreatment unit, described pretreatment unit is connected with supertension membrane method unit.
Described biochemical treatment unit includes: sewage collecting box, regulating reservoir, biochemical treatment tank BAF, Aeration fan, backwashing pump, Produce water tank;Described pretreatment unit at least includes: produce water tank, dosing unit, highly dense pond, pH value regulation unit, sand filtration unit and Aerator.
In described water treatment facilities, sewage collecting box is connected with regulating reservoir, and regulating reservoir is connected with biochemical treatment tank BAF, biochemical Process pond BAF and be connected with producing water tank;Aeration fan is connected with biochemical treatment tank BAF with backwashing pump;Produce water tank to be connected with highly dense pond, Dosing unit is connected with highly dense pond, and highly dense pond is connected with sand filtration unit, and pH value regulation unit is connected with sand filtration unit;Highly dense pond is also Being connected with buffering/concentration basin, buffering/concentration basin is connected with regulating reservoir;Sand filtration unit and middle pressure in described supertension membrane method unit RO unit is connected, and middle pressure RO unit is connected with high pressure RO unit, and high pressure RO unit is connected with supertension RO unit, superelevation RO unit It is connected with evaporative crystallization unit;Purging system is connected with medium pressure RO unit, and medium pressure RO unit, high pressure RO unit are with super High pressure RO unit is also connected with recycle-water unit.
Described regulating reservoir is cubic structure, and its specification is 6000 × 1200 × 1800mm, wall thickness 10mm.Described add prescription The medicine reserve tank of unit is vertical square tube, and described square tube specification is 300 × 380 × 550mm.The alkalescence of described pH value regulation unit Solution reserve tank is vertical square tube, and described square tube specification is 300 × 380 × 550mm.Described highly dense pond is cube shaped frame, its Specification is 5800 × 1200 × 1800mm, wall thickness 10mm.Described sand filtration unit is vertical type cylinder shape structure, its a diameter of 380mm, Highly 380mm, wall thickness 10mm.Described BAF BAF is vertical cylindrical tank, and its specification is φ 1416 × 5510mm. Described sewage collecting box is vertical type cylinder shape water tower shape, and its specification is φ 1320 × 1410mm.Described product water tank is vertical type cylinder Shape water tower shape, its specification is φ 1320 × 1410mm.
Embodiment 1
Water treatment facilities is divided into three unit according to major function: biochemical treatment unit, pretreatment unit, supertension embrane method Unit.
Biochemical treatment unit uses BAF (BAF), is removed SS, COD, BOD, nitrification by biomembrance process, is taken off Nitrogen, dephosphorization, removal AOX etc..Pretreatment section uses high efficiency clarification tank+sand filtration, reduces hardness, COD, glue by physical-chemical reaction Body and turbidity etc., it is ensured that the efficiency of follow-up reverse osmosis advanced processing unit and operation stability.Supertension membrane method unit can be stablized Salinity in removing water, processes high-salt wastewater, does super concentration for zero-emission, reduces evaporation capacity and does technological reserve.
Owing to the MTO waste water of certain embodiment is after anaerobic biochemical treatment, containing higher anaerobe, ammonia in water Nitrogen, COD, SS etc..For ensureing reverse-osmosis treated unit influent quality and the stable operation of equipment, use BAF pair MTO waste water carries out biochemical treatment, and its mechanism is to be organically combined with feedwater rapid filter by biological contact oxidation process, is dropped by biology Solve and be incorporated in same unitary reactor with two kinds of processing procedures of adsorption filtration, with filter tank loads particulate filler (as haydite, Coke, quartz sand, activated carbon etc.) it is carrier, inside filter tank, carry out aeration, make filter material surface grow large number of biological film.Work as dirt When water flows through, utilize the oxygenolysis of the active microorganism of appended biomembrane middle and high concentration on filtrate, give full play to micro-life The physical absorption of the biological metabolism of thing, bioflocculation, biomembrane and filler and retaining and in reactor along water (flow) direction food The classification predation of chain, completes the efficient removal of pollutant.
BAF is using cobblestone and slag haydite as filler.Process though BAF is biomembrane The one of method, but compared with traditional biological filter tank, still has an evident characteristic: the little granular filler of the rough porous that (1) uses As bio-carrier, higher Biomass (up to 10~15g/L) can be kept at filling surface, it is easy to biofilm and stable; (2) biofacies is complicated, and Bacterial community is reasonable, has obvious spatial gradient feature in reactor, be resistant to higher organic and Hydraulic blow load, different pollutant can be removed gradually at same reactor, synchronizes to play biological oxidation, biology Adsorption-flocculation and Physical entrapment effect, effluent quality is good, can meet reuse requirement;(3) it is different from general biofilter and biology Filter tower, need to carry out aeration when removing BOD, ammonia nitrogen, but particulate filler layer has higher oxygen transfer efficiency, and aeration rate is low, fortune Row energy consumption is relatively low, and nitrification and denitrification efficiency is high;(4) filter tank is semiclosed or totally-enclosed structures, and its biochemical reaction is by the external world Temperature impact is less, is suitable for cold district and carries out sewage disposal;(5) microbial biomass of high concentration increase filter tank volume bear Lotus, and then reduce pool volume and floor space, make capital cost be substantially reduced;(6) filter tank running passes through backwash Remove the pollutant retained in filtering layer and the biomembrane come off, it is not necessary to second pond, simplify technological process, use modular construction Design, makes operational management convenient;(7) Sewage Plant abnormal flavour is decreased, without sludge bulking problem, it is not necessary to sludge reflux.
Due to after BAF biochemical treatment, possibly together with the ion of easy fouling in water, part can not be biological The Organic substance of degraded, the dirt easily causing membranous system is blocked up, for ensureing the stable operation of follow-up reverse osmosis units, pretreatment employing carbon Acid sodium and sodium hydroxide softening, PAC coagulation, PAM help solidifying high dense settling pond and sand filtration.Softening process returns at high saline sewage Being widely used in, operating cost is low, can control chemical feeding quantity flexibly according to influent quality;Except removing partial organic substances and micro- Biology, reduces outside float further, and topmost effect is to reduce the basicity in sewage and temporary hardness, it is ensured that follow-up By safety and the economy of water.Coagulation clarification arranges sand filtration filter element after processing, and removes the fine particle in water further, hangs The impurity such as float, colloid.
High dense settling pond by coagulation, flocculating and precipitating three unit of clarification organically combines and forms.Its technological core is Sludge reflux and tube settling application, provided cohesion core by sludge reflux, added reaction zone concentration of suspension, reinforcement Flocculating effect has reclaimed part medicament simultaneously.
High dense settling pond has removal dirty Organic substance in water, colloid, the effect of float.High dense settling pond entrance is Coagulant dosage unit, is sufficiently stirred for making coagulant and sewage be fully contacted by blender and carries out coagulating, formed a large amount of Flocculation group.Sewage by bottom coagulation section water outlet enter sedimentation tank flocculation unit, flocculation unit by add flocculant with And low rate mixing makes above-mentioned a large amount of flocculations group form big and closely knit alumen ustum.Sewage through flocculation section enters high density clarification The precipitation clarification unit in pond, is provided with enough sloping plate deposition areas in this element, makes the current can be with through sloping plate deposition The flow velocity relaxed flows through sloping plate deposition, and the clear water of top overflow is collected by collecting tank and flowed into next treatment facility, and bottom is precipitated The alumen ustum got off, along swash plate slide downward, is deposited in precipitation clarification unit bottom, and the mud part in bucket is by sludge reflux Front end coagulation section backflow squeezed into by pump, in order to giving full play to the effect of medicament, excess sludge is squeezed into mud pit by sludge lifting pump, enters Enter Treatment of Sludge flow processing.
The feature of high dense settling pond: (1) is provided with outside sludge circulation system and mud is risen to instead from sludge condensation district Answer pond water inlet pipe, mix with former water;(2) cohesion-flocculation is carried out in two reaction zones, first passes through the hybrid reaction of stirring District, subsequently enters pulling flow type reaction zone;(3) synthesis organic flocculant PAM is used;(4) from low speed reaction zone to tube settling district Alumen ustum can keep completely, and the alumen ustum matter produced is equal, density is high;(5) efficient tube settling is used, the settling zone rate of climb Up to 20~40m/h, efficient alumen ustum is well precipitated at this;(6) can effectively complete sludge condensation, effluent quality is steady Fixed, anti impulsion load.
Settling zone water outlet is through the filtering layer of sand filtration, it is possible to effectively removes the impurity such as float, colloid in water, works as filtering layer In the impurity that retains too much time, filtering layer mesopore is blocked, and the resistance of current increases, and the rate of filtration diminishes, and crosses filtering velocity for recovering former Degree, can use sand filtration water outlet and compressed air to carry out regular backwash, the impurity accumulated is rinsed out in filtrate hole, recovers to filter Ability.Conventional filtering layer filler is quartz sand, retains the precision of float more than 5~10 μm, and delivery turbidity is at below 3NTU.
Super concentration high-pressure membrane technology with extraordinary diaphragm and the special membrane structure super reverse osmosis concentration technology as core, GTR series membranes is wider than standard pollution-resistant membrane runner, blocks up more resistant to dirt, and diaphragm is more firm, it is ensured that under high pollution, high concentration ratio Stable operation, reduce cleaning frequency, extend film high-performance;It is divided into middle pressure GTR3 series, high pressure GTR4 series and import DTRO series, can realize the concentration segmentation of TDS, and middle pressure GTR3 film arrives to more than 15000mg/L, high pressure GTR4 film More than 45000mg/L, beneficially balance film efficiency and reduction energy consumption.One of core of this technology is extraordinary diaphragm, with conventional film Compare and can bear higher operation pressure, the tolerance float of higher concentration, colloid and COD, substantially improve influent quality The rigors of index;In membrane structure, have employed broader runner, form accessible turbulent flow, significantly slow down the fouling of film, Long-term operation can be ensured.
Super concentration technique refers to select conventional pretreatment facility (such as softening, filtration etc.), use special antipollution dense Contracting reverse osmosis membrane (middle pressure, high pressure, supertension reverse osmosis membrane), by optimizing the response rate and the operating condition of membranous system, with special Mode realize the concentration minimizing (concentrated solution TDS can generally achieve 5%~10%) of strong brine, playing membranous system While superiority, reduce investment and the operating cost of " zero-emission " integrated artistic.The great advantage of this technology is to utilize special type Membrane structure (wide runner, material are special) makes brackish water realize high power concentration under not undergoing phase transition;Open by using Wide runner design, its support flow guiding disc surface particular design, make divided fluid stream uniform, and form more preferably turbulence effects, maximum journey Reduce film surface scale, pollution and the generation of concentration polarization phenomenon on degree, make that there is stronger antifouling property, place pre-to waste water Reason requires relatively low.This technology has realized breakthrough at aspects such as high slat-containing wastewater process, sewage " zero-emission " at present, Possesses industrialized condition.
The large-scale embodiment system that embodiment testing equipment is made up of 2 40 forty equivalent unit 40s, is respectively at biochemical Reason unit, pretreatment unit and supertension membrane method unit, device itself can be analyzed turbidity, electrical conductivity, TDS, pH, SDI etc. and refer to Mark, embodiment device is the equipment completely system of advanced person, is furnished with complete on-line monitoring instrument and robot control system(RCS), pacifies simultaneously Arrange rational sample tap.Each container is allocated as follows: container one is BAF biochemistry unit;Two, container is pre- Process+supertension membrane method unit.
Biological aerated filter process (BAF) unit design water inlet scale is 1m3/ h, filler volume is 5m3, total measurement (volume) is 6.23m3, φ 1416 × 5510mm, filler is cobblestone and slag haydite, and volumetric loading is 0.3kg COD/m3D, if There is 2m3Inlet water tank and each one of water tank, capital equipment and specification or performance parameter such as following table 2-1.
Table 2-1 BAF unit essential equipment (UEE) table
The pretreatment of this project+supertension membrane method unit, is positioned in container two, and pre-processing device design scale is 5m3/ H, it is 2.1m that this embodiment processes the water yield3/h.The antipollution concentration reverse osmosis membrane that the employing of supertension embrane method system is special, and in Pressure, high pressure, supertension and auxiliary medicine system, by optimizing the response rate and the operating condition of membranous system, come in a particular manner (concentrated solution TDS can generally achieve 5%~8%, superiority same playing membranous system to realize the concentration minimizing of strong brine Time, reduce investment and the operating cost of " zero-emission " integrated artistic.Design is pressed aquifer yield 1.8m3/ h, high pressure aquifer yield 0.8m3/ H, supertension aquifer yield 0.1m3/ h, capital equipment and specification or performance parameter such as following table 2-2.
Main Analysis project of the present embodiment is pH, electrical conductivity, CODcr, ammonia nitrogen, SS, total hardness, total alkalinity, The contents such as chloride ion, electrical conductivity, turbidity etc., specific analytical method and detection limit see table 3-1.
Table 3-1 embodiment analyzes method table
BAF is processed as 24 hours running without interruption, supertension membranous system intermittent duty, the micro-life of ozone water outlet Thing limited amount, so embodiment BAF Starting mode uses inocalation method, inocalation method refers in other biological treatment system Mud is added in reactor carry out, as strain, the startup method cultivated.Certain embodiment MTO anaerobic pond mixed liquor 5m3(SV It is 30%, activated sludge concentration: about 4000mg/L), pump in BAF reactor, carry out vexed exposure, hereafter every 24 hours, enter Ozone water outlet about 1m3After, continue vexed exposure, Inlet and outlet water water quality to such as shown in table 3-2 during stable operation.
Table 3-2BAF Inlet and outlet water water quality contrasts
BAF more can be clearly reacted to COD, SS, NH_3-N treating effect by Figure of description 2.
Potassium permanganate composites medicine system is made up of five parts: flocculant PAC dosing part, flocculation aid PAM dosing part, Na2CO3 dosing part, NaOH dosing part, HCl dosing part.The wherein concentration of PAC, PAM, Na2CO3, NaOH, HCl solution It is respectively 5%, 0.2%, 2%, 2%, 35%.First carry out pilot plant test according to water water analysis, determine optimal addition dosage. The dosing of highly dense pond is done lab scale test, and test data is shown in Table 3-3.
Table 3-3 pilot plant test chemical feeding quantity correspondence hardness relation
According to pilot run and the accounting of dosing cost, select PAC, PAM, Na2CO3, NaOH chemical feeding quantity be respectively 30ppm、1.2ppm、20ppm、15ppm.Average hardness extrusion rate is 91.89%, and service data collects as shown in table 3-4:
Table 3-4 highly dense pond Inlet and outlet water hardness data summarization
See Figure of description 3 highly dense pond Inlet and outlet water hardness and the change of hardness extrusion rate.
Supertension membrane method unit normal operation, owing to middle pressure reverse osmosis provides the dense water yield limited, therefore, high pressure and supertension Reverse osmosis operates to periodic running.Carrying out practically data are shown in Table 3-5.
Table 3-5 supertension membrane method unit treating capacity
The middle pressure reverse osmosis response rate is 80%, and film intake pressure is 2.0MPa, upper table data can calculate average salt rejection rate It is 96.3%.The average salt rejection rate of high pressure reverse osmosis is 97.43%, and at Stress control at 4.2MPa, the response rate is 63.63%.Super The when of high pressure reverse osmosis concentrated water pressure 10MPa, the response rate is 50%, and average salt rejection rate is 92.03%.
Pretreatment, middle pressure, high pressure, supertension integrated artistic, former water confluent is 2.4m3/ h, pretreatment efficient sedimentation tank Can run continuously with 24h with middle pressure reverse osmosis, other reverse osmosiss can not run continuously, and high pressure reverse osmosis runs 11h/ days;Superelevation Pressure reverse osmosis runs 7h/ days, and recycled in its entirety rate 95.45%, shown in detailed data table 3-7.
Table 3-7 middle high-pressure and the supertension reverse osmosis response rate and salt rejection rate
Seeing Figure of description 4,5,6,7 four curve chart response situation, middle pressure reverse osmosis runs under stable case, pressure Power controls at 2.0MPa, in order to prevent the dirt of diaphragm from blocking up, at every 2h low-pressure washing about 3min.High pressure reverse osmosis is in stable case Lower operation, pressure is at 4.2MPa, and owing to high pressure feed water by reverse osmosis salinity is high, therefore operating pressure rises very fast, at 50min~ 60min low-pressure washing about 3min, each flushing water is from reverse osmosis produced water.By Figure of description 7 it can be seen that the dense water of supertension TDS meansigma methods is 72100ppm, and dense water can direct follow-up entrance crystallization and evaporation system.
Investigating this technique from COD, former water COD is 105mg/L in meansigma methods, and the middle average COD of pressure reverse osmosis produced water is 6.1mg/L, clearance is 94.2%;The average COD of high pressure reverse osmosis produced water is 16.16mg/L, and clearance is 95.8%;Supertension Reverse osmosis produced water COD meansigma methods is 75mg/L, and clearance is 95.5%.Concrete data are as shown in table 3-8:
In 3-8, pressure produces water, high pressure produces water, supertension produces water COD information slip
Reverse osmosis units sees Figure of description 8 to the removal effect of COD.By this embodiment analysis of experiments table existing Bright:
(1) BAF unit: from the point of view of the data obtained, COD, SS, ammonia nitrogen are put down by BAF All extrusion rates are respectively 62.45%, 55.88%, 64.78%, further increase the biodegradability of waste water, simultaneously for entering height The subsequent treatment of Mi Chi reduces cost.
(2) highly dense pond+sand filtration unit: high efficiency clarification tank device, has effectively played sodium carbonate/sodium hydroxide and has softened, drops The functions such as soft, float colloid and turbidity, determine suitably add dose in the case of (sodium carbonate 20mg/L, hydrogen-oxygen Change sodium 15mg/L, PAC 30mg/L, PAM 1.2mg/L, hydrochloric acid 20mg/L), total hardness clearance 91.89%, it is ensured that follow-up instead The stable operation of penetration equipment.
(3) supertension reverse osmosis units: high dense settling pond, sand filtration, reverse osmosis are properly functioning, middle pressure, high pressure and super The each salt rejection rate of high pressure reverse osmosis is respectively as follows: 96.3%, 97.43% and 92.03%, average salt rejection rate 95.25%, corresponding each instead The permeation unit response rate is respectively as follows: 75%, 63.63% and 50%, flow process recycled in its entirety rate 95.45%.
It can be seen that each unit can be run by complete stability from data above conclusion, it is possible to effectively eliminate in water Most of soluble salt is divided, float, colloid, hardness, basicity, COD, Organic substance and microorganism etc..Original water hardness is low, hard-off By a relatively simple, produce water can directly replenishment cycles sewer or boiler chemical water station processing unit, after the degree of depth softens, benefit Fill boiler feedwater.The crystallizable evaporation of dense water.
It can be seen that each unit can be run by complete stability from data above conclusion, it is possible to effectively eliminate in water Most of soluble salt is divided, float, colloid, hardness, basicity, COD, Organic substance and microorganism etc..Original water hardness is low, hard-off By a relatively simple, produce water can directly replenishment cycles sewer or boiler chemical water station processing unit, after the degree of depth softens, benefit Fill boiler feedwater.The crystallizable evaporation of dense water.
It can be seen that each unit can be run by complete stability from data above conclusion, it is possible to effectively eliminate in water Most of soluble salt is divided, float, colloid, hardness, basicity, COD, Organic substance and microorganism etc..Original water hardness is low, hard-off By a relatively simple, produce water can directly replenishment cycles sewer or boiler chemical water station processing unit, after the degree of depth softens, benefit Fill boiler feedwater.The crystallizable evaporation of dense water.
It should be noted that above-mentioned specific embodiment is exemplary, those skilled in the art can be at this utility model Find out various solution under the inspiration of disclosure, and these solutions also belong to open scope of the present utility model also Within falling into protection domain of the present utility model.It will be understood by those skilled in the art that this utility model description and accompanying drawing thereof It is illustrative and not constitutes limitations on claims.Protection domain of the present utility model is by claim and equivalent thereof Limit.

Claims (9)

1. a sewage pretreatment device, it is characterised in that described sewage pretreatment device at least includes: produce water tank, add prescription Pond first, highly dense, pH value regulation unit, sand filtration unit and aerator;
Wherein said product water tank is connected with described highly dense pond, and described highly dense pond is connected with described sand filtration unit, and described highly dense pond is also Being connected with buffering/concentration basin, described buffering/concentration basin is connected with regulating reservoir.
2. sewage pretreatment device as claimed in claim 1, it is characterised in that described dosing unit and described highly dense pond phase Even.
3. sewage pretreatment device as claimed in claim 1, it is characterised in that described pH value regulation unit and described sand filtration list Unit is connected.
4. sewage pretreatment device as claimed in claim 1, it is characterised in that biochemical treatment unit and described Wastewater Pretreatment Device is connected, and wherein said biochemical treatment unit includes: sewage collecting box, regulating reservoir, biochemical treatment tank BAF, Aeration fan, anti- Wash pump and produce water tank;
Described sewage collecting box is connected with described regulating reservoir, and described regulating reservoir is connected with described biochemical treatment tank BAF, described biochemistry Process pond BAF to be connected with described product water tank;Described Aeration fan is connected with biochemical treatment tank BAF with described backwashing pump.
5. sewage pretreatment device as claimed in claim 1, it is characterised in that described sewage pretreatment device and superelevation press mold Method unit is connected, and described supertension membrane method unit includes middle pressure RO unit, high pressure RO unit and supertension RO unit.
6. sewage pretreatment device as claimed in claim 1, it is characterised in that the alkaline solution storage of described pH value regulation unit Standby case is vertical square tube, described a height of 300 × 380 × 550mm of square tube length and width.
7. sewage pretreatment device as claimed in claim 1, it is characterised in that described highly dense pond is cube shaped frame, and it is long Wide a height of 5800 × 1200 × 1800mm, wall thickness 10mm.
8. sewage pretreatment device as claimed in claim 1, it is characterised in that described sand filtration unit is vertical type cylinder shape knot Structure, its a diameter of 380mm, highly 380mm, wall thickness 10mm.
9. sewage pretreatment device as claimed in claim 1, it is characterised in that produce water described in described sewage pretreatment device Case is connected with described highly dense pond, and described highly dense pond is connected with described sand filtration unit, described highly dense pond also with buffering/concentration basin phase Even, described buffering/concentration basin is connected with regulating reservoir;Described dosing unit is connected with described highly dense pond, described pH value regulation unit It is connected with described sand filtration unit.
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