CN205710331U - A kind of supertension film device - Google Patents

A kind of supertension film device Download PDF

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Publication number
CN205710331U
CN205710331U CN201620523953.0U CN201620523953U CN205710331U CN 205710331 U CN205710331 U CN 205710331U CN 201620523953 U CN201620523953 U CN 201620523953U CN 205710331 U CN205710331 U CN 205710331U
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pressure
unit
supertension
reverse osmosis
water
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权秋红
张建飞
元西方
王志稳
鲍涛
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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

This utility model relates to a kind of supertension film device, described device plastics security personnel's filter, middle pressure reverse osmosis membrane high pressure reverse osmosis membrane, supertension reverse osmosis membrane, water pump and water tank.Plant running of the present utility model is stable, and Water Sproading rate is high, requires relatively low to Wastewater Pretreatment, and equipment investment is little.

Description

A kind of supertension film device
Technical field
This utility model relates to water treatment field, particularly relates to a kind of supertension film 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 divide Attached for physical absorption, chemisorbed and ion-exchange absorption, it is often the case that three kinds of mechanism occur simultaneously.Film desalination process is to utilize to ooze Pressure reduction realizes the technology of desalination as motive force thoroughly.Film desalination process mainly has reverse osmosis (RO), disc tube reverse osmosis (dt-ro) (DTRO), film Distill (MD), just permeate (FO), electrodialysis (ED) etc..It is low that film desalination process has small investment, energy consumption, also is able to reach the degree of depth simultaneously 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 capital cost By shortcomings such as high, floor space is big, power consumption height.
Utility model content
For the deficiency of prior art, this utility model provides a kind of supertension film device, described supertension film device bag Include: middle pressure RO unit, high pressure RO unit and supertension RO unit;Sand filtration unit and medium pressure RO in described supertension film device Unit is connected, and medium pressure RO unit is connected with described high pressure RO unit, described high pressure RO unit and described supertension RO unit Being connected, superelevation RO unit is connected with evaporative crystallization unit;Purging system is connected with medium pressure RO unit, and medium pressure RO is mono- High pressure RO unit first, described is also connected with recycle-water unit with described supertension RO unit.
According to one preferred embodiment, medium pressure RO unit include middle pressure booster pump, middle pressure reverse osmosis membrane structure, The dense water tank of middle pressure;Wherein, described sand filtration unit is connected with medium pressure booster pump, medium pressure booster pump and medium pressure reverse osmosis Permeable membrane structure is connected, and medium pressure reverse osmosis membrane structure water tank dense with medium pressure is connected.
According to one preferred embodiment, described high pressure RO unit include high-pressure booster, high pressure reverse osmosis membrane structure, High-pressure thick water tank;Wherein, the dense water tank of middle pressure is connected with described high-pressure booster, described high-pressure booster and described high pressure reverse osmosis Membrane structure is connected, and described high pressure reverse osmosis membrane structure is connected with described high-pressure thick water tank.
According to one preferred embodiment, described supertension RO unit includes ultrahigh-pressure intensifier, supertension reverse osmosis The dense water tank of membrane structure, supertension;Wherein, high-pressure thick water tank is connected with described ultrahigh-pressure intensifier, described ultrahigh-pressure intensifier with Described supertension reverse osmosis membrane structure is connected, and described supertension reverse osmosis membrane structure water tank dense with described supertension is connected.
According to one preferred embodiment, medium pressure reverse osmosis membrane structure, described high pressure reverse osmosis membrane structure and institute State supertension reverse osmosis membrane structure and all use the open runner wider than standard pollution-resistant membrane.
According to one preferred embodiment, biochemical treatment unit is connected with entering film pretreatment unit, described in enter film and locate in advance Reason unit is connected with described supertension film device.
According to one preferred embodiment, described biochemical treatment unit includes: at sewage collecting box, regulating reservoir, biochemistry Reason pond BAF, Aeration fan, backwashing pump, product water tank;Described sewage collecting box is connected with described regulating reservoir, described regulating reservoir and institute Stating biochemical treatment tank BAF to be connected, described biochemical treatment tank BAF is connected with described product water tank;Described Aeration fan and described backwash Pump is connected with described biochemical treatment tank BAF.
According to one preferred embodiment, enter film pretreatment unit described at least to include: produce water tank, dosing unit, height Mi Chi, pH value regulation unit, sand filtration unit and aerator;Wherein said product water tank is connected with described highly dense pond, described in add prescription First and described highly dense pond is connected, and described highly dense pond is connected with described sand filtration unit, described pH value regulation unit and described sand filtration list Unit is connected;Described highly dense pond is also connected with buffering/concentration basin, and described buffering/concentration basin is connected with described regulating reservoir.
According to one preferred embodiment, sand filtration unit is connected with middle pressure booster pump, medium pressure booster pump and middle pressure Reverse osmosis membrane structure is connected, and medium pressure reverse osmosis membrane structure water tank dense with middle pressure is connected;
The dense water tank of medium pressure is connected with high-pressure booster, and described high-pressure booster is connected with high pressure reverse osmosis membrane structure, Described high pressure reverse osmosis membrane structure is connected with high-pressure thick water tank;
Described high-pressure thick water tank is connected with ultrahigh-pressure intensifier, described ultrahigh-pressure intensifier and supertension reverse osmosis membrane structure Being connected, described supertension reverse osmosis membrane structure water tank dense with supertension is connected;
The dense water tank of described supertension is connected with evaporative crystallization unit;
Medium pressure reverse osmosis membrane structure, described high pressure reverse osmosis membrane structure and supertension reverse osmosis membrane structure also with return Water use sector is connected.
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.This reality Stable with novel plant running, Water Sproading rate is high, requires relatively low to Wastewater Pretreatment, and equipment investment is little.
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 it is shown in figure 1, supertension film device includes: middle pressure RO unit, high pressure RO Unit and supertension RO unit;In described supertension film device, sand filtration unit is connected with middle pressure RO unit, and middle pressure RO unit is with high Pressure RO unit is connected, and high pressure RO unit is connected with supertension RO unit, and superelevation RO unit is connected with evaporative crystallization unit;Clean system System is connected with medium pressure RO unit, medium pressure RO unit, high pressure RO unit and supertension RO unit also with recycle-water unit It is connected.
Medium pressure RO unit includes middle pressure booster pump, middle pressure reverse osmosis membrane structure, the dense water tank of middle pressure;Wherein, described sand Filter unit be connected with middle pressure booster pump, middle pressure booster pump is connected with middle pressure reverse osmosis membrane structure, middle pressure reverse osmosis membrane structure and in Dense water tank is pressed to be connected.Described high pressure RO unit includes high-pressure booster, high pressure reverse osmosis membrane structure, high-pressure thick water tank;Wherein, in Pressing dense water tank to be connected with high-pressure booster, high-pressure booster is connected with high pressure reverse osmosis membrane structure, high pressure reverse osmosis membrane structure with High-pressure thick water tank is connected.Described supertension RO unit includes ultrahigh-pressure intensifier, supertension reverse osmosis membrane structure, the dense water of supertension Case;Wherein, high-pressure thick water tank is connected with ultrahigh-pressure intensifier, and ultrahigh-pressure intensifier is connected with supertension reverse osmosis membrane structure, super High pressure reverse osmosis membrane structure water tank dense with supertension is connected.Medium pressure reverse osmosis membrane, high pressure reverse osmosis membrane and supertension reverse osmosis Permeable membrane all uses the open runner wider than standard pollution-resistant membrane.
Sand filtration unit is connected with middle pressure booster pump, and middle pressure booster pump is connected with middle pressure reverse osmosis membrane structure, middle pressure reverse osmosis Membrane structure water tank dense with middle pressure is connected;The dense water tank of middle pressure is connected with high-pressure booster, and high-pressure booster is tied with high pressure reverse osmosis membrane Structure is connected, and high pressure reverse osmosis membrane structure is connected with high-pressure thick water tank;High-pressure thick water tank is connected with ultrahigh-pressure intensifier, and supertension increases Press pump is connected with supertension reverse osmosis membrane structure, and supertension reverse osmosis membrane structure water tank dense with supertension is connected;The dense water of supertension Case is connected with evaporative crystallization unit;Middle pressure reverse osmosis membrane structure, high pressure reverse osmosis membrane structure are with supertension reverse osmosis membrane structure also It is connected with recycle-water unit.
In water treatment facilities, sewage collecting box is connected with regulating reservoir, and regulating reservoir is connected with biochemical treatment tank BAF, biochemical treatment Pond BAF is 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 with slow Punching/concentration basin is connected, and buffering/concentration basin is connected with regulating reservoir;Sand filtration unit and middle pressure RO unit in described supertension film device Being connected, 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 and evaporation Crystalline element is connected;Purging system is connected with medium pressure RO unit, medium pressure RO unit, high pressure RO unit and supertension 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, enter film pretreatment unit, supertension Film device.
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 film device can stable Except salinity in water, process high-salt wastewater, do super concentration for zero-emission, reduce evaporation capacity and do 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, suspension further The impurity such as thing, 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 is to more than 15000mg/L, high pressure GTR4 film to 45000mg/ More than L, beneficially balance film efficiency and reduction energy consumption.One of core of this technology is extraordinary diaphragm, can hold compared with conventional film By higher operation pressure, the tolerance float of higher concentration, colloid and COD, substantially improve influent quality index is severe Carve requirement;In membrane structure, have employed broader runner, form accessible turbulent flow, significantly slow down the fouling of film, it is ensured that be long Periodic duty.
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, enters film pretreatment unit and supertension film device, and device itself can analyze turbidity, electrical conductivity, TDS, pH, SDI etc. Index, embodiment device is the equipment completely system of advanced person, is furnished with complete on-line monitoring instrument and robot control system(RCS), simultaneously It is scheduled that rational sample tap.Each container is allocated as follows: container one is BAF biochemistry unit;Two, container Enter film pretreatment+supertension film device.
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
This project enter film pretreatment+supertension film device, be positioned in container two, pre-processing device design scale is 5m3/ h, it is 2.1m that this embodiment processes the water yield3/h.Supertension embrane method system uses special antipollution to concentrate reverse osmosis membrane, And middle pressure, high pressure, supertension and auxiliary medicine system, by optimizing the response rate and the operating condition of membranous system, with special side Formula realize strong brine concentration minimizing (concentrated solution TDS can generally achieve 5%~8%, play membranous system superiority While, 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 3-2 BAF 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 film device normal operation, owing to middle pressure reverse osmosis provides the dense water yield limited, therefore, high pressure and supertension are anti- Infiltration operates to periodic running.Carrying out practically data are shown in Table 3-5 and table 3-6.
Table 3-5 supertension film device treating capacity
Table 3-6 middle high-pressure and supertension reverse-osmosis treated data
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%, controls at 4.2MPa entering film pressure, and the response rate is 63.63%.The when of supertension 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 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 (1)

1. a supertension film device, it is characterised in that described supertension film device includes: middle pressure RO unit, high pressure RO unit With supertension RO unit;
In described supertension film device, sand filtration unit is connected with medium pressure RO unit, medium pressure RO unit and described high pressure RO Unit is connected, and described high pressure RO unit is connected with described supertension RO unit, and supertension RO unit is connected with evaporative crystallization unit; Purging system is connected with medium pressure RO unit, medium pressure RO unit, described high pressure RO unit and described supertension RO unit Also it is connected with recycle-water unit;
Medium pressure RO unit includes middle pressure booster pump, middle pressure reverse osmosis membrane structure and the dense water tank of middle pressure;Wherein, described sand filtration list Unit is connected with medium pressure booster pump, and medium pressure booster pump is connected with medium pressure reverse osmosis membrane structure, medium pressure reverse osmosis Permeable membrane structure water tank dense with medium pressure is connected;
Described high pressure RO unit includes high-pressure booster, high pressure reverse osmosis membrane structure and high-pressure thick water tank;Wherein, medium pressure is dense Water tank is connected with described high-pressure booster, and described high-pressure booster is connected with described high pressure reverse osmosis membrane structure, and described high pressure is anti- Permeable membrane structure is connected with described high-pressure thick water tank;
Described supertension RO unit includes ultrahigh-pressure intensifier, supertension reverse osmosis membrane structure and the dense water tank of supertension;Wherein, institute State high-pressure thick water tank to be connected with described ultrahigh-pressure intensifier, described ultrahigh-pressure intensifier and described supertension reverse osmosis membrane structure phase Even, described supertension reverse osmosis membrane structure water tank dense with described supertension is connected;
Medium pressure reverse osmosis membrane structure, described high pressure reverse osmosis membrane structure and described supertension reverse osmosis membrane structure all use ratio The open runner that standard pollution-resistant membrane is wide.
CN201620523953.0U 2016-06-01 2016-06-01 A kind of supertension film device Active CN205710331U (en)

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