CN204434334U - A kind of pulse electrolysis equipment processing high concentrated organic wastewater RO concentrated solution - Google Patents

Abstract

The utility model relates to a kind of pulse electrolysis equipment processing high concentrated organic wastewater RO concentrated solution.Comprise electrolyzer, electrode 8, the pulse power, oscilloscope, the pulse power connects oscilloscope, it is characterized in that the electrolyzer falling " work " font central hollow that electrolyzer is made up of two ponds 15 and two tanks 16, in two ponds 15, recycle pump 9 is set respectively, be close to installation two groups of positive and negative electrodes 8 respectively at the wall of two tanks 16, each electrode 8 upper end is connected with the pulse power.This pulse electrolysis equipment makes to reduce concentration polarization in electrolytic process and produces, and reduces superpotential, is beneficial to improve electrolytic efficiency, meanwhile, greatly reduces electrolysis time, reduce electrolysis energy consumption.

Description

A kind of pulse electrolysis equipment processing high concentrated organic wastewater RO concentrated solution

Technical field

The utility model relates to a kind of sewage disposal device, is specifically related to a kind of pulse electrolysis equipment processing high concentrated organic wastewater RO concentrated solution.

Background technology

Electrolysis tech is widely applied in the industrial production.In order to improve electrolytic efficiency, reduce working cost, electrochemistry subject is constantly in exploration electrolyzer and efficiency thereof.As the electrolyzer of industrial modal electrolytic saltwater caustic soda, its shape is " beaker type ", and cathode electrode adopts mesh electrode to raise the efficiency.The electrolyzer of electrolytic aluminum is also " beaker type ", and to make negative electrode at the bottom of pond, makes anode relatively to hang less graphite column.Electrolysis tech is also applied in sewage disposal technology and technique, and electrolyzer equipment wherein adopts " beaker type " and U-shaped pipe electrolyzer etc. usually.But dispose of sewage in process in actual electrolysis, surrounding them easily produces concentration polarization, superpotential increases, and causes electrolytic reaction can not be effectively applied to the removal of pollutent, but degraded inorganics salt.

In recent years, the membrane techniquies such as ultrafiltration, nanofiltration, reverse osmosis are obtaining important application in the wastewater treatment or reuse of the industries such as municipal effluent, refuse landfill, plating, printing and dyeing, Iron And Steel Industry, chemical industry, food and pharmacy.If reverse osmosis technology is when acquiring 70% ~ 80% qualified reuse water, also create about 30% concentrated solution.As one of them percolate dope of high concentrated organic wastewater RO concentrated solution, pollutent high enrichment, high (the wherein CL of saltiness ^-be 2400 ~ 2800 mg/L), hardness is large, and COD is about 1800 ~ 2400mg/L, NH ₃-N is between the mg/L of 40mg/L ~ 65, and B/C is less than 0.1, and colourity is much larger than 100 times.Traditional water technology cannot head it off effectively, mostly enters municipal sewage pipe network and enters sewage treatment plants process or return and be sprayed onto refuse landfill, creates very large impact and harm to city planting ductwork and the Sewage treatment systems that produces concentrated solution.

Pulse electrolysis is by constantly reaching the speed promoting redox, mass transfer, adsorption and desorption to the process of electrode repetition " power supply-power-off-power supply ", electrolytic efficiency improves.But during single use pulse electrolysis technical finesse high concentrated organic wastewater membranous system concentrated solution, electrolysing period is long, cost is high, and contaminant removal efficiency is not high, and water outlet can not reach emission standard.

For solving single use pulse electrolysis technical finesse high concentrated organic wastewater membranous system concentrated solution Problems existing, a kind of Apparatus and method for of pulse electrolysis process RO concentrated solution of applicant's earlier application, application number 201410025931.7, this application technical process is RO concentrated solution → Fenton pretreatment pool → first stage precipitation tank → pulse electrolysis pond → second-level settling pond → qualified discharge, and pulse electrolysis adds Fe in pond ₃o ₄powder carries out electrolysis, adopts Fe ₃o ₄the technique of collaborative pulse electrolysis process high concentrated organic wastewater RO concentrated solution process.

Summary of the invention

The utility model is intended at least to solve one of technical problem existed in prior art.The purpose of this utility model is that design is a kind of for the treatment of the pulse electrolysis equipment in high concentrated organic wastewater RO concentrated solution technique, for removing COD, the NH in high concentrated organic wastewater RO concentrated solution ₃-N, colourity etc., with other technical tie-up effect in technique, effective degradation of contaminant, makes effluent quality reach emission standard, and energy consumption significantly reduces simultaneously.

Technical solution of the present utility model is: a kind of pulse electrolysis equipment processing high concentrated organic wastewater RO concentrated solution, comprises electrolyzer, electrode, the pulse power, oscilloscope, and the pulse power connects oscilloscope; The electrolyzer falling " work " font central hollow that electrolyzer is made up of two ponds and two tanks, in two ponds, arrange recycle pump respectively, be close to installation two groups of positive and negative electrodes respectively at the wall of two tanks, each electrode upper end is connected with the pulse power .

Described positive and negative electrode is respectively ruthenium iridium coating layer electrode and Ti electrode.

Fe is added in electrolyzer ₃o ₄powder; Turbidimeter, pH meter, electrical conductivity meter, thermometer are installed around the body of pond.

Fe ₃o ₄the processing condition of collaborative pulse electrolysis are: Fe ₃o ₄add-on is at 1 ~ 3g/L, and battery lead plate spacing is 1.5 ~ 3.0 ㎝, current density 5 ~ 15 mA/㎝ ², frequency 4K ~ 5KHZ, electrolytic reaction time 20 ~ 35min, the water temperature of having reacted rear electrolyzer rises about 15 DEG C than normal temperature, specific conductivity 7 ~ 14 k μ S/cm.Fe in reaction process ₃o ₄small flco in continuous absorption electrolyzer becomes comparatively big flocculating body, and the pollutent in this kind of flco no longer participates in electrolysis, but with Fe ₃o ₄absorption also precipitates under magnetic force attracts, separated in solid form, solids solidification treatment or burning.

The utility model is applied to a kind of technique processing high concentrated organic wastewater RO concentrated solution, and this technical process is that high concentrated organic wastewater RO concentrated solution → chemical Fenton pre-treatment → special membrane sepn → pulse electrolysis system is (containing efficient electrolysis cell system and Fe ₃o ₄synergy) → magnetic settling tank → supernatant liquor qualified discharge.

This technical process is: 1. high concentrated organic wastewater RO concentrated solution enters chemical Fenton pretreatment pool by pipeline; 2. special membranous system separating device floss high efficiency separation that chemical Fenton pretreatment pool is produced; 3. in pulse electrolysis pond, Fe is added ₃o ₄, collaborative pulse electrolysis, Fe in reaction process ₃o ₄small flco in continuous absorption electrolyzer becomes comparatively big flocculating body, and the pollutent in this kind of flco no longer participates in electrolysis, but with Fe ₃o ₄absorption also precipitates under magnetic force attracts, separated in solid form, solids solidification treatment or burning; 4. be energized to the magnetic substance of magnetic settling tank, produce directional magnetic field during energising, need to arrange the coil trapezoidal working hour from top to bottom according to technique, electromagnetic field is by Fe in settling tank ₃o ₄be adsorbed to bottom settling tank, with Fe ₃o ₄the flco of attachment arrives the bottom of settling tank; Magnetic flux>=5.5 Gauss that required coil produces, the ladder working hour is respectively 1,2,3,4,5,6 minute; 5. to the Fe be deposited on bottom settling tank ₃o ₄and mud, in addition extremely short electric current, namely and Fe glaur ₃o ₄be separated, glaur, Fe ₃o ₄discharge successively, Fe isolated by settling tank thus ₃o ₄.

The beneficial effects of the utility model are: this pulse electrolysis equipment makes to reduce concentration polarization in electrolytic process and produces, reduce superpotential, be beneficial to improve electrolytic efficiency, electrolyzer wall is close in electrode side simultaneously, current efficiency is improved, this structure pulse electrolysis pond electrolysis time is less than 30 minutes, greatly reduces electrolysis time, reduces electrolysis energy consumption.

Accompanying drawing explanation

Fig. 1 is a kind of process high concentrated organic wastewater RO concentrated solution process flow sheet.

Fig. 2 is pulse electrolysis pond vertical view.

Fig. 3 is pulse electrolysis pond front view.

1. chemical Fenton pretreatment pools in figure; 2. stirring in slurry device; 3. reflux pump; 4. equalizing tank; 5. membranous system separating device; 6. equalizing tank; 7. pulse electrolysis pond; 8. electrode; 9 recycle pumps; 10, magnetic settling tank; 11. magnetic substances; 12. welding plates and trip switch; 13. sludge sumps; 14. Fe ₃o ₄pond for recovering; 15. ponds; 16. tanks.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described further.

The utility model is used for a kind of process high concentrated organic wastewater RO concentrated solution technique, and technique major equipment comprises: membranous system separating device 5, pulse electrolysis pond 7(are added with Fe3O4) the pulse electrolysis equipment, the magnetic settling tank 10 that form.

As shown in Figure 1: chemical Fenton pretreatment pool 1, in acid adjustment environment, Fenton reagent and organic waste water RO concentrated solution pollutent fully react, and produce a large amount of floss; Stirring in slurry device 2, assists Fenton reaction to raise the efficiency; Reflux pump 3, assists Fenton reaction to raise the efficiency; The water outlet of chemistry Fenton pretreatment pool 1 enters equalizing tank 4, and pond is deposited in water inlet, the concentrated solution circulation of equalizing tank 4 or membranous system separating device 5; Membranous system separating device 5, isolates concentrated solution and output clear water; Equalizing tank 6, deposits the clear water of membrane sepn, is prepared as next step electrolysis; Pulse electrolysis pond 7, and electrode 8 forms pulse electrolysis system; Recycle pump 9, assists to improve electrolytic efficiency; Magnetic settling tank 10, precipitation electrolytic solution; Magnetic substance 11, produces orderly magnetic field; The external welding plate of electromagnetic field and trip switch 12, the trapezoidal working hour of controlling magnetic field; Sludge sump 13, deposits mud; Fe ₃o ₄pond for recovering 14 reclaims Fe ₃o ₄.

A kind of pulse electrolysis equipment processing high concentrated organic wastewater RO concentrated solution, comprise electrolyzer, electrode 8, the pulse power, oscilloscope, the electrolyzer falling " work " font central hollow that electrolyzer is made up of two ponds 15 and two tanks 16, in two ponds 15, recycle pump 9 is set respectively, be close to installation two groups of positive and negative electrodes 8 respectively at the wall of two tanks 16, each electrode 8 upper end is connected with the pulse power .

Described positive and negative electrode 8 is respectively ruthenium iridium coating layer electrode and Ti electrode.

Described positive and negative electrode 8 distance between plates 1.5 ~ 3.0 ㎝.

The combination process of application the utility model pulse electrolysis device processes high concentrated organic wastewater RO concentrated solution is: high concentrated organic wastewater R O concentrated solution → chemical Fenton pre-treatment → membrane sepn → Fe ₃o ₄synergistic pulse electrolysis pond 7 → magnetic settling tank, 10 → supernatant liquor qualified discharge;

Described chemical Fenton pre-treatment, part surface promoting agent, jelly pollutent in high concentrated organic wastewater RO concentrated solution are removed in Fenton reaction, some stubbornnesses are scattered in simultaneously in the aqueous solution organic destruction become cotton-shaped, create a large amount of floss, the sewage of floss enters equalizing tank 4.

Described membrane sepn, the floss produced by chemical Fenton pretreatment pool is separated, and flco is concentrated.

Pulse electrolysis pond 7 is entered through the isolated clear liquid of membranous system separating device 5 (water outlet), pulse electrolysis pond 7 is made up of two tanks 16 and two ponds 15, recycle pump 9 is separately installed with in two ponds 15, recycle pump 9 promotes liquid in electrolytic system and flows fast, surrounding them concentration polarization is reduced, and that reduces inorganics ion obtains electric and electric discharge; Positive and negative electrode 8 be close to tank 16, with improve electric current utilization ratio, reduce energy consumption.Fe ₃o ₄the processing condition of collaborative pulse electrolysis are: Fe ₃o ₄add-on is at 1 ~ 3g/L, and the distance between plates of electrode 8 is 1.5 ~ 3.0 ㎝, current density 5 ~ 15 mA/㎝ ², frequency 4K ~ 5KHZ, electrolytic reaction time 20 ~ 35min, the water temperature of having reacted rear electrolyzer is greater than 15 DEG C than normal temperature ascending temperature, specific conductivity 7 ~ 14 k μ S/cm.

Fe is added in the mixed solution in pulse electrolysis pond 7 ₃o ₄powder, Fe ₃o ₄attract suspended substance extremely small in electrolytic solution, and along with the increase of electrolysis process propelling particle diameter.

Mixture after electrolysis enters magnetic settling tank 10, and the outside installation soft iron of magnetic settling tank 10 and magnetic coil establish the magnetic substance 11 of composition, and coil can be divided into many groups, can generate an electromagnetic field.Fe in the electromagnetic fields attract mixed solution produced during energising ₃o ₄, simultaneously by Fe ₃o ₄the small colloidal suspensions attracted is along with Fe ₃o ₄to the bottom of magnetic settling tank 10.

By magnetic settling tank 10 bottom coil short time current in addition, glaur and Fe ₃o ₄be separated, magnetic settling tank 10 lower end Pai Kou is successively by glaur, Fe ₃o ₄discharge, isolate Fe ₃o ₄.Glaur amount is very little, and by sludge treating method process, supernatant liquor is qualified discharge then.

Said process is controlled by system integration module.

For somewhere, middle part consumer waste filling and embedding factory percolate process engineering RO concentrated solution, this project percolate process water yield 150m ³/ d, produces about 50 m ³the concentrated solution of/d.

Use the Inlet and outlet water parameter list of this technique:

Above-mentioned technical process is: Fenton pretreatment pool 1 initial water temperature 15 DEG C, reaction times 60min; Membranous system separating device 5 working hour 35min, intake pressure 0.095Mpa, top hole pressure 0.025Mpa, flow 18L/min, Water discharge flow speed 90L/h:m ²; Pulse electrolysis time 25min, voltage 15V in pulse electrolysis pond 7, current density 8 mA/㎝ ², frequency 4K ~ 5KHZ, water temperature rises to 38 DEG C from 15 DEG C; Magnetic settling tank 10 comprises electromagnetism and inhales precipitation, spoil disposal, water discharge time 15min, external coil operating voltage 20V altogether.

System integration automatic control program in above-mentioned technical process, plant automation runs, and arranges monitoring management.

Above-mentioned technique adopts membranous system separating device 5 to instead of first stage precipitation tank, and the pollutants removal rate be blocked improves 5 ~ 10%.After being separated by first stage precipitation tank, COD is 410mg/L, after adopting the separation of membranous system separating device 5, COD is 292mg/ L, after membranous system separating device 5 is separated, the difference (118 mg/L) reduced reduces very big load to rear end electrolysis process, because the special difficult degradation of the pollutent being in this stage, the removing of COD difficulty.Membranous system separating device 5 is adopted to make electrolysis time at least shorten 8 ~ 12 minutes, the cost that expend also much less.

State technique in pulse electrolysis system, have employed the use that pulse electrolysis pond 7 replaces general electrolyzer.Adopt pulse electrolysis pond 7 to decrease ion concentration polarization to produce, reduce mineral ion (CL ^-) participating in electrolysis, after electrolysis time 25 minutes, water quality can reach emission standard, and electrolysis time at least shortens 2 ~ 9 minutes, and another the electrolysis cost that makes reduces.

Above-mentioned technique have employed the use that magnetic settling tank 10 instead of general second-level settling pond in pulse electrolysis system.Magnetic settling tank 10 makes the suspended substance of how difficult sedimentation obtain removal, improves water quality, shortens sedimentation time about 20 minutes, again makes holistic cost reduce.

This percolate concentrated solution is after the process of this covering device, and COD clearance can reach more than 97%, NH ₃-N 98%, colourity 94%, stable water outlet reaches " integrated wastewater discharge standard " (GB8978-1996) primary standard.

Claims (3)

1. one kind processes the pulse electrolysis equipment of high concentrated organic wastewater RO concentrated solution, comprise electrolyzer, electrode (8), the pulse power, oscilloscope, the pulse power connects oscilloscope, it is characterized in that the electrolyzer falling " work " font central hollow that electrolyzer is made up of two ponds (15) and two tanks (16), in two ponds (15), recycle pump (9) is set respectively, be close to installation two groups of positive and negative electrodes (8) respectively at the wall of two tanks (16), each electrode (8) upper end is connected with the pulse power .

2. a kind of pulse electrolysis equipment processing high concentrated organic wastewater RO concentrated solution as claimed in claim 1, is characterized in that positive and negative electrode (8) is respectively ruthenium iridium coating layer electrode and Ti electrode.

3. a kind of pulse electrolysis equipment processing high concentrated organic wastewater RO concentrated solution as claimed in claim 1, is characterized in that positive and negative electrode (8) distance between plates 1.5 ~ 3.0 ㎝.