CN202558668U - Vortex rapid rotation separation system - Google Patents

Abstract

The utility model discloses a vortex rapid rotation separation system. In the system, oil-containing sewage together with prepared chemicals and compressed air enter a multi-stage vortex differential speed three-phase mixer through a pressurizing pump; the mixer allows sufficient contact between the chemicals and pollutants to form floccules, makes compressed air sufficiently dissolved in sewage, then sends the sewage into a release cavity; in the release cavity, along with pressure reduction, dissolved air in the floccules gradually releases and grows to extrude out water inside the floccules, air and the solid floccules form a porous hollow state, along with significant reduction of water content and self specific gravity, the floccules form scum and enter a separation tank; a scraper above the separation tank scrapes away the scum; the scraped scum is discharged by a subsequently connected scum bucket for subsequent dewatering treatment; the separated water overflows into a water outlet tank through a water outlet weir plate, and is discharged through a water outlet pipe. The utility model has the advantages of good treatment effect, saved chemicals, little sludge generation, saved investment, simple control, and low maintenance cost.

Description

Separation system can speed be revolved in a kind of whirlpool

Technical field

The utility model belongs to sewage treatment area, be particularly useful for oil field reinjection water, emulsified oil-containing waste water,

Separation system can speed be revolved in a kind of whirlpool of oily water treatments such as meal kitchen class waste water.

Background technology

Along with the development of economic society, contaminated wastewater grows with each passing day, and environmental pollution more and more receives the people's attention; And oily(waste)water is common in numerous waste water; Be easy to bring the industry and the sanitary wastewater of environmental pollution, harm is serious, and its processing at home and abroad all attracts great attention.In processes such as oil production, refining of petroleum, petrochemical complex, vehicle cleaning, machinofacture, food-processing, all can produce oily(waste)water at present.In a single day oil pollutant gets into water body and diffuses to form oil film at the water surface at once, stops water body reoxygenation from atmosphere.The oils migration circle is wide, degradation speed is slow, finally influences human health.Source according to oily(waste)water is different with the existence form of oils in water, can be divided into: oil slick, dispersed oil, oil in water emulsion and dissolving oil four big classes.These oils complicated components contain a large amount of MO or vegetables oil, emulsifying agent and other organism, and emulsification degree height, stable in properties, removal difficulty are big.Therefore, how efficiently to carry out oily water separation and be still a difficult problem to reach emission standard.

The method of processing oily(waste)water commonly used has gravitational separation process, centrifugal separation, air supporting method, ultrafiltration process, filtration method, absorption method etc. at present.Each facture all has the relative merits of oneself.

Gravitational separation process and centrifugal separation can only be divided the oil slick and a small amount of bigger dispersed oil of particle diameter in dried up, originally do not have removal effect for dispersion, emulsification, dissolved oil base.Therefore common pretreatment unit as oily(waste)water.

The air supporting method is according to the buoyancy function principle, and the oil droplet of oil in water emulsion and dispersed oil is sticked on a large amount of microbubbles, and bubble is because the buoyancy of self is taken oil droplet out of the water surface, to realize the solid-liquid separation process.In practical application, because waste water quality is different, take all factors into consideration treatment effect and factors such as capital construction, working cost, selected air-float technology is also different.More commonly vacuum dissolved air flotation and pressurized dissolved air flotation method, the former is used seldom by the various factors restriction at present, and the latter is the most normal air supporting method of employing.The air supporting method is general to combine with coagulation technology, can remove most of dispersed oil in the water, and emulsification and dissolved oil are also had certain clearance, so is the maximum oily wastewater treatment method of employing.But existing traditional air supporting method is handled oily(waste)water and had several big shortcomings: oil slick is hard to manage, and flotation time stops longer; Mud is prone to be deposited at the bottom of the air flotation pool, the reliever frequent jams; When treatment capacity was big, the airfloat equipment floor space was big, and investment cost is high; Equipment integral property is imperfect, installs loaded down with trivial details; To being master's oily(waste)water with oil in water emulsion and dissolving oil, traditional pneumatically supported removal effect is not good.

Ultrafiltration process was mainly used in condensed emulsified MO in the last few years.Although ultra-filtration technique can effectively separate profit under certain condition, the film pollution that produces in the concentration process can cause membrane flux seriously to be decayed, and transmembrane pressure significantly rises, and membrane lifetime shortens, the membrane sepn decrease in efficiency, and energy consumption increases.Most of ultra-filtration membrane just gets into the frequent cleaning phase after moving half a year, not only consume a large amount of clean-out systems, and produces the secondary pollution problem of oil-containing scavenging solution.Seldom there is the work-ing life of ultra-filtration membrane can be above 2 years.Because the investment of film is bigger usually, initial investment and running cost that ultrafiltration removes oil system are all very high.Ultrafiltration is extremely low to the tolerance of oil slick in addition, in case in the system owing to pre-treatment is not good at, is concentrated and reason such as to separate out and produce oil slick, can bring irreversible destruction to ultra-filtration membrane.

Filtration and absorption method mainly are to wait the oil of trace in the planar water with special filtrate (nut-shell, oil suction plastics).This method is only applicable to the very low situation of oleaginousness in the waste water, otherwise can cause filtrate saturated very soon.Frequent cleaning and regeneration can cause the physical abuse of filtrate, and can lose efficacy gradually owing to being difficult to thorough backwash filtrate, need often replenish, and working cost is higher.And the removal effect of this method is not good when oil droplet emulsification.The disclosed egg Shape Plate Separator of Chinese patent CN201342267Y is achieved in that and comprises separation vessel and dividing plate; Separation vessel top one side is provided with water pump; The separation vessel top is provided with cover plate, and cover plate is provided with water-in, and container bottom sets out water pipe; Water-stop sheet, oil separating plate and strongback that the separation vessel bottom is provided with are divided into oil, separation cell and pond successively with separation vessel, and the oil sump top sets out oil pipe; Connected entrance is left in oil separating plate lower end and separation cell bottom; The separation cell bottom is provided with air supporting pipe, air supporting pipe coupling Airfloat pump.This tripping device only is applicable to the oily(waste)water that the water yield is smaller, and treatment scheme is longer, and wastewater flow and operation can not better controlled.

The oil field reinjection water embrane method of Chinese patent CN102225812A is handled; Its basic procedure comprises: oily(waste)water gets into the slurry tank sedimentation; Remove big suspended solids of part and oil slick, the water after the sedimentation gets into ceramic membrane ultrafitration equipment, at ceramic membrane device interior circulating filtration; See through the direct re-injection of penetrating fluid of film, the continuation sedimentation circulating filtration that does not see through.Though this technology is simple, filtering accuracy is high, move for some time after, the wet goods dirt can stop up the film pipe, causes membrane flux to be decayed significantly, the difficult result who reaches oily water separation smoothly.

Based on the widespread use of cyclone separation process in oily(waste)water is handled, recently a lot of water treatment manufacturers all propose viewpoint that traditional air supporting and cyclone technique are combined, have obtained some achievements in research.

Set forth a kind of oil, gas, water three-phase separating device in the U.S. Pat 7157007, this device is a vertical-type air-flotation separating tank, mainly is divided into upper, middle and lower-ranking, has utilized rotational flow separation, coarse and air supporting stripping technique respectively.The mid-way that is positioned at jar top is equipped with an inner core, and oily(waste)water enters into inner core from tangential inlet and produces eddy flow, in inner core, carries out oily water separation, and oil phase directly gets into the oil skimming bucket.When being positioned at the coalescence layer at jar middle part, the dispersive oil droplet is grown up in this gathering from the effusive current of interior tube bottom.Part macrobead oil droplet can be under buoyancy, overcome self gravitation and the main body following upwards buoyance lift that begins to flowing mutually, from and removed a part of oil.In the jar bottom injector is installed, the gas of utilization jar inner top and backflow are purified waste water and in injector, after the shear-mixed, are produced micro-bubble, the oily(waste)water that gets off from the coalescence laminar flow is carried out air supporting handle.But the periodic cleaning problem of coalescence layer bothers very much, and the internal structure of whole plant is very complicated simultaneously, and the cost of processing and manufacturing is higher.

Set forth a kind of combined degassing and flotation tank in the U.S. Pat 7144503, a cylindric inner core and a spirrillum inlet guide card are arranged in jar, oily(waste)water forms eddy flow from the tangential inlet entering jar on jar top, and bubble is separated out from water simultaneously.Bubble and oil droplet are depressed into inner tube wall under the effect of eddy flow, the two rises to tank deck after combining to adhere to, and discharge through the oil gas vent of tank deck.According to the patentee, this device is better to the treatment effect of oily(waste)water, and cost and maintenance cost are very low, is applicable to that relatively the oil production platforms of offshore operation or Floating Production storage unload relatively stricter field use such as oil tanker (FPSO) space requirement of etc.ing.But from the appended structure iron of this patent, rise to jar inner top oil and bubble scum silica frost efflux some problems that exist.Especially the oil production platforms of offshore operation or FPSO can be in vibrating state because of the effect of ripple, wave, stream; This moment, a jar inner liquid level was difficult to keep stable; Thereby cause the water cut in the outer gentle bubble scum silica frost of oil extraction of this device too high, thereby had a strong impact on separating effect.

By above-mentioned visible, existing treatment technology is difficult to oily(waste)water is obtained good treatment effect at present, and particularly when the component of oily(waste)water became increasingly complex, intractability was increasing.

The utility model content

To the deficiency that prior art exists, the purpose of the utility model is to provide a kind of whirlpool ability speed that can realize that high-pressure air dissolves, effect is put forward in the agent molecule stretching, coagulation-flocculation stirs (contaminant trapping), flco formation, the bubble nucleus generates revolve separation system.

The utility model is realized through following technical scheme.

Separation system can speed be revolved in a kind of whirlpool, comprises automated dispensing medicine system, high pressure intake pump, revolves current difference three-phase mixing tank, discharges chamber, separation cell, slag bucket, effluent trough, and said medicament is realized the accurate dosing of system through dispensing system; The high pressure intake pump is squeezed into the multistage current difference three-phase mixing tank that revolves with sewage, and medicament and pressurized air also get into the multistage current difference three-phase mixing tank that revolves, and fully contacts the back with pollutent and gets in the release chamber; In discharging the chamber, reduce with pressure, the molten gas slow release in the flco is grown up; Moisture in the flco is extruded, and gas and solid flco form porous hollow form, and it is more and more lighter that water ratio significantly reduces while self proportion; Can not float voluntarily by external force; Get into separation cell behind the final formation scum silica frost, strike off scum silica frost through the slag scraper above the separation cell, the slag bucket that the scum silica frost that strikes off is connected by the back is discharged and is made follow-up processed; Isolating water gets into effluent trough through the water outlet weir plate, discharges through rising pipe.

The said current difference three-phase mixing tank that revolves is the multistage current difference three-phase mixing tank that revolves.

The utility model beneficial effect: the medicament that (1) adds almost 100% is utilized, and therefore only needs few reagent consumption; (2) system produces few mud (scum silica frost), have only traditional technology 1/3 less than; (3) treatment effect is fabulous, can settle at one go for oil field reinjection water oil is handled below the 3-5mg/L from hundreds of mg/L (even higher); Can realize complete breakdown of emulsion and separation for oil in water emulsion; (4) to the clearance of suspended substance up to more than 99%; (5) few volume, compact equipment is saved initial cost; (6) control is simple, does not have any easily worn part, need not to worry blockage problem, and maintenance cost is extremely low.

Compared with prior art; The core of the utility model is " revolving current difference three-phase mixing tank "; And phase deutero-" bubble nucleus growth technology ", the former can effectively control soup mixing, flco formation and grow up, and same machine can be handled the waste water of different qualities; Changing the line of production or sewage need not the replacing system when changing, only need regulate medicament and mix and flco formation; The latter is that gas is filled with whole flco under dissolved state, and countless micro bubbles generates nucleus growth in flco inside with periphery, in case pressure reduces, bubble can expand rapidly in flco inside, and effectively attached to the flco periphery.And in traditional coagulation air-float; Coagulating agent and flocculation agent are owing to invalid flco bridge joint, and the flco water ratio is high, and its inadequate stirring causes many PM for particulate matters not caught by medicament; Floc particle contacts with the instability of bubble and causes often taking place the desorption phenomenon simultaneously, and water outlet is difficult to control.Therefore a kind of brand-new dissolved air floatation technology can have been represented by fast rotary separator (Hai Ensi) in the utility model whirlpool, and its each item characteristic has all surmounted traditional air-dissolving air-float.

Description of drawings

Fig. 1 can speed revolve the structural representation of separation system for the utility model whirlpool;

Fig. 2 is the process flow sheet of the utility model oily wastewater treatment method.

Label declaration among the figure

1-loading hopper, 2-steel basin, 3-stirrer, 4-volume pump

5-high pressure intake pump 6-revolve current difference three-phase mixing tank 7-release chamber 8-slag scraper

9-separation cell, 10-slag bucket, 11-water outlet weir plate, 12-effluent trough

A-automated dispensing medicine system B-multistage current difference three-phase the mixing tank that revolves.

Embodiment

How further specify the utility model below in conjunction with accompanying drawing 1-Fig. 2 realizes.

Embodiment 1

Certain factory's emulsifying greasy dirt water is handled

Former regimen condition: discharge of sewage 5m ³/ hr.Former water-emulsified oil 5,000～8,000mg/L, and contain the aluminium bits, aluminum ion, pH are 8～9.

As depicted in figs. 1 and 2, medicament SEPIGEL 305 powder quantitatively added steel basin 2 through loading hopper 1 after, open stirrer 3 and the tap water that quantitatively adds evenly stirs, be made into certain density solution;

With high pressure intake pump 5 above-mentioned former (dirt) water input is revolved in the current difference three-phase mixing tank 6 and to form eddy current; With dosing volume pump 4 medicament for preparing is got into pressurized air then and revolve current difference three-phase mixing tank 6 and be dissolved in the incoming waste water,, produce sufficiently long streamline because sewage forms repeatedly eddy current in revolving current difference three-phase mixing tank 6; Strengthened chance with the medicament collision; And because the shearing force that does not exist mechanical stirring to produce, the agent molecule chain can not interrupted, and micelle shape polymer fully is drawn into the long chain molecule shape under the speed difference; The electrically charged utilization ratio of medicament increases greatly; Cut the waste, and the high-pressure aerated chamber of whirlpool central authorities fully is dissolved into air in the waste water owing to the restriction of mass transfer in liquid phase speed.Multistage three-phase mixing tank makes above-mentioned phase reaction carry out more fully.

With revolve the release chamber 7 that current difference three-phase mixing tank 6 is connected, reduce with pressure, The dissolved gas forms countless bubble nucleus by the pollutent flco; These nucleus are grown directly upon among the mud flco, promptly produce spongy flco when pressure reduces air bubble expansion, in the flco floating-upward process; Tiny flco merges rapidly grows up, and bubble also sharply expands simultaneously, ties up the space of flco inside clearance water; Flco water ratio and proportion further reduce, and flco is solid and reach the very strong i of going up voluntarily;

Flco gets into separation cell 9 from discharging after coming out in chamber 7, is provided with a slag scraper 8 above the separation cell 9, scum silica frost

Concentrate at Chi Mianshang; Pile up each other, be bonded to the scum silica frost blanket, formation integral body floats and strikes off through slag scraper 8; The poor slightly floc particle of last i is poured repeatedly contact reacts of release area and fresh come-up flco and unnecessary thin bubble, finally forms good scum silica frost again and strikes off through slag scraper 8;

The slag bucket 10 that the scum silica frost that strikes off is connected by the back is discharged and is made follow-up processed, and isolating water is through water outlet

Weir plate 11 overflows get into effluent trough 12, discharge through rising pipe.

Original place science and engineering skill: adopt the ultra-filtration membrane of U.S. KOCH to concentrate.

Former technological problems: 1. blockage problem is serious, and organism stops up, and salt crust stops up, and every operation just needs to clean half a day; 2. control is complicated, and operation easier is big; 3. investment is expensive, 20 yuan of/ton water of working cost very high (>); 4. the dope that contains oil in water emulsion 20% after concentrating can't be disposed, and a large amount of ultrafiltration rinse water are difficult to handle; 5. because oil slick is separated out the irreversible pollution to film, the work-ing life of film was less than 1 year.

Handle back water outlet: COD 3, about 000mg/L

The utility model is through utilizing the result after the whirlpool fast rotary separator of ability (Hai Ensi) is handled:

Only add zwitterion PAM and just remove 95% COD and 99% oil in water emulsion, water outlet COD 1,000mg/L, oil in water emulsion < 100mg/>L; Investment is 1/3 of ultrafiltration; Control and simple; Ultralow working cost only consumes electricity and medicament, about 4 yuan of/ton water; Sludge yield is few, less than 1/10 of original system; Do not have any easily worn part, only need raw water pump machine envelope of replacing in 3 years.

Embodiment 2

Certain airport kitchen waste water pre-treatment, flow 20m ³/ hr

Former regimen condition: former water BOD=3,000mg/L, COD=4,000-8,000mg/L, grease 1,500mg/L and be oil in water emulsion basically contains a large amount of tensio-active agents, TSS=2,500mg/ L, pH=4～13

Original place science and engineering skill: adopt traditional air supporting to carry out pre-treatment.

Former technological problems: coagulation demulsification often lost efficacy, and water outlet oil-containing severe overweight causes follow-up biochemical system normally to move.The oily sludge difficult treatment, foam is serious.

The utility model whirlpool ability fast rotary separator (Hai Ensi) result:

Up to 98%, the water outlet oil-containing is 20-30 mg/L only, and has saved occupation of land greatly to the clearance of oil.The mud that produces is less than 1/3 of original system, and ten minutes is easy to dehydration.

Embodiment 3

Certain oil field reinjection water is handled, flow 5m ³/ hr

Original place science and engineering skill: the re-injection water treatment station is divided into secondary.First step technology is: the slurry tank → secondary settlement jar → surge tank that a boosts → coarse sand hay tank, the first step are handled back water outlet oil-containing at 30mg/L, and suspended substance is about 20mg/L; Water outlet gets into second stage technology, and secondary process is: a slurry tank → secondary settlement jar → more medium filter → walnut shell filter → outer infusion water.

Former technological problems: because this Oilfield using Sanyuan District oil, oil removal+filtration treatment is adopted in part oil emulsification in the re-injection water, can't remove oil in water emulsion.Therefore through second-stage treatment technology, water outlet only reaches: < 30mg/>L, < 30mg/>L, severe overweight do not reach the index of " petroclastic rock reservoir water water quality standard " defined to oil to suspended substance.This system's control is complicated, and sand-bed filter produces a large amount of backwash waste, and producing water ratio is low, and secondary pollution is serious.

The utility model whirlpool ability fast rotary separator (Hai Ensi) result:

Use whirlpool ability fast rotary separator (Hai Ensi), need not to do pre-treatment, water outlet: suspended substance < 3mg/>L, oil < 3mg/>L.Reach " petroclastic rock reservoir water water quality standard " B1 standard.

Claims (2)

1. separation system can speed be revolved in a whirlpool, comprises automated dispensing medicine system, high pressure intake pump, revolves current difference three-phase mixing tank, discharges chamber, separation cell, slag bucket, effluent trough, and it is characterized in that: said medicament is realized accurate dosing through the automated dispensing medicine system; The high pressure intake pump is squeezed into sewage and is revolved current difference three-phase mixing tank, and medicament and pressurized air also get into and revolves current difference three-phase mixing tank, fully contacts the back with pollutent and gets in the release chamber; In discharging the chamber, reduce with pressure, the molten gas slow release in the flco is grown up; Moisture in the flco is extruded, and gas and solid flco form porous hollow form, and it is more and more lighter that water ratio significantly reduces while self proportion; Can not float voluntarily by external force; Get into separation cell behind the final formation scum silica frost, strike off scum silica frost through the slag scraper above the separation cell, the slag bucket that the scum silica frost that strikes off is connected by the back is discharged and is made follow-up processed; Isolating water gets into effluent trough through the water outlet weir plate, discharges through rising pipe again.

2. separation system can speed be revolved in a kind of whirlpool according to claim 1, and it is characterized in that: the said current difference three-phase mixing tank that revolves is the multistage current difference three-phase mixing tank that revolves.

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