CN204474504U - The treatment unit of brown coal low-temperature pyrolysis waste water - Google Patents

The treatment unit of brown coal low-temperature pyrolysis waste water Download PDF

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CN204474504U
CN204474504U CN201520129375.8U CN201520129375U CN204474504U CN 204474504 U CN204474504 U CN 204474504U CN 201520129375 U CN201520129375 U CN 201520129375U CN 204474504 U CN204474504 U CN 204474504U
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water
pond
connects
water outlet
basin
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傅汉文
傅灿煌
黄平
张运虎
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SHOURONG ENVIRONMENTAL TECHNOLOGY Co Ltd
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SHOURONG ENVIRONMENTAL TECHNOLOGY Co Ltd
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Abstract

The utility model discloses a kind for the treatment of unit of brown coal low-temperature pyrolysis waste water, comprise pretreatment system, biochemical treatment system, chemical electrolysis system and advanced oxidation system.The utility model is according to the water quality characteristics of brown coal low-temperature pyrolysis waste water, waste water first carries out the pre-treatment such as oil removal, air supporting, after pre-treatment, waste water is by the multiplex biochemistry combination process of anaerobism, hydrolysis and aerobic aeration, last again through the advanced oxidation of O3 contacted oxidation, complex biological filter, water outlet gets final product qualified discharge.

Description

The treatment unit of brown coal low-temperature pyrolysis waste water
Technical field
The utility model relates to the technical field of brown coal wastewater treatment, the treatment unit of specifically brown coal low-temperature pyrolysis waste water.
Background technology
In brown coal Low Temperature Pyrolysis Process, containing a large amount of objectionable impurities in the waste water produced, as phenol, NH 3-N and tar etc., its water quality is as shown in the table:
Project Influent quality Project Influent quality
pH 10 NH 3-N 850mg/l
CODcr 33400mg/l Volatile phenol 4150mg/l
BOD5 11700mg/l Petroleum-type 100mg/l
SS 500mg/l
This waste water all has the features such as complicated component, Pollutant levels are high, biochemical treatment difficulty is large, toxicity is large, and a large amount of hazardous and noxious substances will suppress the breeding of microorganism.General wastewater processing technology cannot be used; According to analytical calculation, in waste water, more than 60% of COD is the contribution of aldehydes matter, and wherein volatile phenol accounts for 40%.Adopt burning method process will consume a large amount of coal gas, energy consumption is high, and water cannot be recycled.The sewage produced brown coal low temperature pyrogenation is the technical barrier being badly in need of at present solving.
Usually, solvent dephenolize and to steam stripping ammonia be the effective ways removing brown coal low temperature pyrogenation Phenol for Waste Water and ammonia, after dephenolize and ammonia still process, Determination of Volatile Phenol in Refinery Wastewater and ammonia major part of volatilizing are removed, and COD is corresponding minimizing about 90% also.And fixing phenol only removes about 50%, but biodegradability declines greatly, and with regard to biochemical treatment, as not dephenolize ammonia still process, the Biochemical Treatment of waste water is better.Therefore, how effectively to remove hazardous and noxious substances, ensure that the biodegradability of sewage is the key problem in technology of this wastewater treatment simultaneously.
Summary of the invention
The utility model provides a kind for the treatment of unit of brown coal low-temperature pyrolysis waste water, its object is to overcome existing brown coal low-temperature pyrolysis wastewater biochemical intractability large, cannot the shortcomings such as general wastewater processing technology be used.
The utility model adopts following technical scheme:
The treatment unit of brown coal low-temperature pyrolysis waste water, comprises pretreatment system, biochemical treatment system, chemical electrolysis system and advanced oxidation system.
Above-mentioned pretreatment system comprises equalizing tank, pH adjusts pond one, oil trap, oil reservoir, coagulation basin one, air flotation pool, scum silica frost pond and Buffer Pool, the water outlet of described equalizing tank connects the water-in that pH adjusts pond one, pH adjusts the water-in of the water outlet connection oil trap in pond one, the oil outlet of oil trap connects oil reservoir, the water outlet of oil trap connects the water-in of coagulation basin one, the water outlet of coagulation basin one connects the water-in of air flotation pool, and the water outlet of air flotation pool connects the water-in of Buffer Pool;
Above-mentioned biochemical treatment system comprises EGSB pond, sludge sump, hydrolytic tank one, Aerobic Pond one, coagulation basin two, flocculation basin one, settling tank one, pH adjusts pond two and pH adjusts pond three, the water-in in described EGSB pond connects the water outlet of Buffer Pool, the water outlet in EGSB pond connects the water-in of hydrolytic tank one, be provided with a plurality of pH in hydrolytic tank one and adjust pond two, the water outlet of hydrolytic tank one connects the water-in of Aerobic Pond one, be provided with a plurality of pH in Aerobic Pond one and adjust pond three, the water outlet of Aerobic Pond one connects the water-in of coagulation basin two, the water outlet of coagulation basin two connects the water-in of flocculation basin one, the water outlet of flocculation basin one connects the water-in of settling tank one,
Above-mentioned chemical electrolysis system comprises nano-catalytic electrolysis machine, hydrolytic tank two, Aerobic Pond two, coagulation basin three, flocculation basin two and settling tank two, the water-in of nano-catalytic electrolysis machine connects the water outlet of settling tank one, the water outlet of nano-catalytic electrolysis machine connects the water-in of hydrolytic tank two, the water outlet of hydrolytic tank two connects the water-in of Aerobic Pond two, the water outlet of Aerobic Pond two connects the water-in of coagulation basin three, the water outlet of coagulation basin three connects the water-in of flocculation basin two, and the water outlet of flocculation basin two connects the water-in of settling tank two;
Above-mentioned advanced oxidation system comprises O3 contacted oxidation pond, complex biological filter and clean water basin, the water-in in O3 contacted oxidation pond connects the water outlet of settling tank two, the water outlet in O3 contacted oxidation pond connects the water-in of complex biological filter, the water outlet of complex biological filter connects the water-in of clean water basin, the water outlet qualified discharge of clean water basin.
Further, the sludge outlet of above-mentioned settling tank one and the sludge outlet of settling tank two are all attached to described sludge sump, and the supernatant liquor outlet of sludge sump is attached to described equalizing tank, and the concentrated solution outlet of sludge sump then connects a pressure filter.
Further, above-mentioned Aerobic Pond one is provided with a mixture export, and this mixture export is connected in hydrolytic tank one.
Further, bottom, above-mentioned EGSB pond is provided with water distributing pipe, and this middle and upper part, EGSB pond is also provided with triphase separator.
Further, the adjacent two interelectrode voltages of above-mentioned nano-catalytic electrolysis machine are 2 ~ 12V, and current density is 10 ~ 320mA/cm 2.
Further, above-mentioned nano-catalytic electrolysis machine comprises power supply and electrolyzer, electrode in electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode, the top layer of nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10 ~ 35nm, and the substrate of nano-catalytic noble electrode is titanium plate or plastic plate.
Adopt the treatment process of the treatment unit of above-mentioned brown coal low-temperature pyrolysis waste water, comprise the steps:
(1) pre-treatment
1. brown coal low-temperature pyrolysis waste water is from flowing into equalizing tank regulating pondage and water quality, is then promoted to pH by lift pump and adjusts pond one, add sulfuric acid, pH value is adjusted to about 7;
2. pH regulator pond one water outlet carries out oil removal process from flowing into oil trap, and carry out water surface frizing by Oil scraper, oil slick enters oil reservoir, regularly transports outward disposal;
3. oil trap water outlet is from flowing into coagulation basin one, and in coagulation basin one, quantitatively add calcium chloride, carry out breakdown of emulsion to oil in water emulsion, it is 26min that coagulation basin one controls the residence time;
4. coagulation basin one water outlet enters air flotation pool and removes SS, oil slick and COD, and air-flotation scum enters scum silica frost pond by skimmer device;
5. air flotation pool water outlet is from flowing into Buffer Pool, adds potassium primary phosphate at Buffer Pool, and by steam heating system control temperature at 35 ~ 38 DEG C, it is 4.5h that Buffer Pool controls the residence time;
(2) biochemical treatment
1. Buffer Pool waste water lifting is to EGSB pond, and microorganism is fully contacted with organic, and it is 59h that this EGSB pond controls the residence time;
2. EGSB pond is from flowing into hydrolytic tank one, in hydrolytic tank one, by the effect of enzyme, the larger molecular organics in waste water is decomposed into small organic molecule, and a plurality of pH adjustment pond two is set in hydrolytic tank one, add the basicity produced with anti-nitration reaction in sulfuric acid, it is that to adjust residence time in pond two be all 1h for 19.5h, pH that hydrolytic tank one controls the residence time;
3. hydrolytic tank one water outlet enters Aerobic Pond one, and arranges a plurality of pH in Aerobic Pond one and adjust pond three, adds sodium carbonate respectively, and it is that to adjust residence time in pond three be all 1.43h for 42.4h, pH that Aerobic Pond one controls the residence time;
4. Aerobic Pond one water outlet is from flowing into coagulation basin two, and supplement while basicity further adding sodium carbonate, quantitatively add coagulating agent PAC, enlisted the services of by throw out most of in Aerobic Pond one, it is 24min that coagulation basin two controls the residence time;
5. coagulation basin two water outlet is from flowing to flocculation basin one, and in flocculation basin one, add PAM, make the integrated macrobead polymkeric substance of the small-particle polymer poly of coagulation basin two, it is 24min that flocculation basin one controls the residence time;
6. flocculation basin one water outlet is from flowing to settling tank one, in settling tank one, carry out solid-liquid separation;
(3) chemical electrolysis
1. settling tank one water outlet is from flowing to nano-catalytic electrolysis machine, by the electrolysis of nano-catalytic electrolysis machine produce nascent oxygen and status nascendi hydroxyl oxidize Decomposition Wastewater in organism, the biodegradability of further raising waste water, it is 45h that nano-catalytic electrolysis machine controls the residence time;
2. the water outlet of nano-catalytic electrolysis machine is from flowing to hydrolytic tank two, and by the small organic molecule such as larger molecular organics breaks down into amino acids, carbohydrate in the effect waste water of enzyme in hydrolytic tank two, it is 5.8h that hydrolytic tank two controls the residence time;
3. hydrolytic tank two water outlet enters Aerobic Pond two, organism in further degrading waste water, and it is 8.3h that Aerobic Pond two controls the residence time;
4. Aerobic Pond two water outlet is from flowing into coagulation basin three, and supplement while basicity further adding sodium carbonate, quantitatively add coagulating agent PAC, enlisted the services of by throw out most of in Aerobic Pond two, it is 24min that coagulation basin three controls the residence time;
5. coagulation basin three water outlet is from flowing to flocculation basin two, and in flocculation basin two, add PAM, make the integrated macrobead polymkeric substance of the small-particle polymer poly of coagulation basin three, flocculation basin two residence time processed is 24min;
6. flocculation basin two water outlet is from flowing to settling tank two, in settling tank two, carry out solid-liquid separation;
(4) advanced oxidation
1. settling tank two water outlet is from flowing to O3 contacted oxidation pond, remaining hardly degraded organic substance in oxygenolysis waste water, and it is 3.6h that O3 contacted oxidation pond controls the residence time;
2. the water outlet of O3 contacted oxidation pond is from flowing to complex biological filter, ensures organism, the SS qualified discharge of water outlet, and it is 3.6h that complex biological filter controls the residence time;
3. complex biological filter water outlet can be up to standard, is temporary in clean water basin;
The mud of above-mentioned settling tank one, settling tank two utilizes high difference pressure regularly to enter described sludge sump, sludge sump carries out sludge condensation, equalizing tank process got back to by supernatant liquor, mud after concentrated carries out sludge dewatering by pneumatic diaphragm pump suction chamber filter press, mud cake outward transport after processed is disposed, and dehydration mother liquor returns equalizing tank.
From above-mentioned to description of the present utility model, the utility model has the advantage of:
The utility model is according to the water quality characteristics of brown coal low-temperature pyrolysis waste water, select the combination process of pre-treatment, biochemistry, chemical electrolysis and advanced oxidation, waste water first carries out the pre-treatment such as oil removal, air supporting, after pre-treatment, waste water is by the multiplex biochemistry combination process of anaerobism, hydrolysis and aerobic aeration, last again through the advanced oxidation of O3 contacted oxidation, complex biological filter, water outlet gets final product qualified discharge.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model.
Embodiment
Embodiment of the present utility model is described with reference to the accompanying drawings.
The treatment unit of brown coal low-temperature pyrolysis waste water, with reference to Fig. 1, comprises pretreatment system, biochemical treatment system, chemical electrolysis system and advanced oxidation system.
Pretreatment system comprises equalizing tank 11, pH adjusts pond 1, oil trap 13, oil reservoir 14, coagulation basin 1, air flotation pool 16, scum silica frost pond 17 and Buffer Pool 18, the water outlet of equalizing tank 11 connects the water-in that pH adjusts pond 1, pH adjusts the water-in of the water outlet connection oil trap 13 in pond 1, the oil outlet of oil trap 13 connects oil reservoir 14, the water outlet of oil trap 13 connects the water-in of coagulation basin 1, the water outlet of coagulation basin 1 connects the water-in of air flotation pool 16, and the water outlet of air flotation pool 17 connects the water-in of Buffer Pool 18.
Biochemical treatment system comprises EGSB pond 21, sludge sump 22, hydrolytic tank 1, Aerobic Pond 1, coagulation basin 2 25, flocculation basin 1, settling tank 1, pH adjusts pond 2 28 and pH adjusts pond 3 29, the water-in in EGSB pond 21 connects the water outlet of above-mentioned Buffer Pool 18, the water outlet in EGSB pond 21 connects the water-in of hydrolytic tank 1, be provided with a plurality of pH in hydrolytic tank 1 and adjust pond 2 28, the water outlet of hydrolytic tank 1 connects the water-in of Aerobic Pond 1, be provided with a plurality of pH in Aerobic Pond 1 and adjust pond 3 29, the water outlet of Aerobic Pond 1 connects the water-in of coagulation basin 2 25, the water outlet of coagulation basin 2 25 connects the water-in of flocculation basin 1, the water outlet of flocculation basin 1 connects the water-in of settling tank 1.
Chemical electrolysis system comprises nano-catalytic electrolysis machine 31, hydrolytic tank 2 32, Aerobic Pond 2 33, coagulation basin 3 34, flocculation basin 2 35 and settling tank 2 36, the water-in of nano-catalytic electrolysis machine 31 connects the water outlet of settling tank 1, the water outlet of nano-catalytic electrolysis machine 31 connects the water-in of hydrolytic tank 2 32, the water outlet of hydrolytic tank 2 32 connects the water-in of Aerobic Pond 2 33, the water outlet of Aerobic Pond 2 33 connects the water-in of coagulation basin 3 34, the water outlet of coagulation basin 3 34 connects the water-in of flocculation basin 2 35, the water outlet of flocculation basin 2 35 connects the water-in of settling tank 2 36.
Advanced oxidation system comprises O3 contacted oxidation pond 41, complex biological filter 42 and clean water basin 43, the water-in in O3 contacted oxidation pond 41 connects the water outlet of settling tank 2 36, the water outlet in O3 contacted oxidation pond 41 connects the water-in of complex biological filter 42, the water outlet of complex biological filter 42 connects the water-in of clean water basin 43, the water outlet qualified discharge of clean water basin 43.
The sludge outlet of above-mentioned settling tank 1 and the sludge outlet of settling tank 2 36 are all attached to sludge sump 22, and the supernatant liquor outlet of sludge sump 22 is attached to equalizing tank 11, and the concentrated solution outlet of sludge sump 22 then connects a pressure filter 51.Above-mentioned Aerobic Pond 1 is provided with a mixture export, and this mixture export is connected in hydrolytic tank 1.Bottom, above-mentioned EGSB pond 21 is provided with water distributing pipe, and by water uniformly distributing, while water inlet, the effect taking into account mixing and stir, makes microorganism fully contact with organic, ensure that good pollutant removal; This middle and upper part, EGSB pond 21 is also provided with triphase separator, is separated gas, liquid, solid three-phase.
The adjacent two interelectrode voltages of above-mentioned nano-catalytic electrolysis machine 31 are 2 ~ 12V, and current density is 10 ~ 320mA/cm 2.Nano-catalytic electrolysis machine 31 comprises power supply and electrolyzer, electrode in electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode, wherein, the top layer of nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10 ~ 35nm, and the substrate of nano-catalytic noble electrode is titanium plate or plastic plate.
The treatment process of the treatment unit of above-mentioned brown coal low-temperature pyrolysis waste water, comprises the steps:
(1) pre-treatment
1. brown coal low-temperature pyrolysis waste water is from flowing into equalizing tank 11 regulating pondage and water quality, is then promoted to pH by lift pump and adjusts pond 1, add sulfuric acid, pH value is adjusted to about 7.
The discharge of waste water is interval and instability, therefore, the waste water water yield, change of water quality are larger round the clock, as directly entered treatment system, normally play its purification function unfavorable to follow-up each treatment facility, even may be destroyed, each parameter is also difficult to control, and treatment effect is unstable, therefore arranges equalizing tank before waste water enters treatment system, in order to the homogenizing of the adjustment and water quality of carrying out the water yield, to ensure normally carrying out of waste water.The object arranging equalizing tank in waste water disposal facility is: the first, fully composite waste, and balanced water quality and quantity, prevents the sharply change for the treatment of system load; The second, store the water yield, be convenient to the process of systematic quantification continous-stable; Three, when not having wastewater streams fashionable, still input waste water can be continued to biological treatment system; Four, prevent high density toxic substance from entering biological treatment system; Five, when there are abnormal conditions, equalizing tank can temporary reservoir waste water.
2. pH regulator pond 1 water outlet carries out oil removal process from flowing into oil trap 13, and carry out water surface frizing by Oil scraper, oil slick enters oil reservoir 14, regularly transports outward disposal.
Oil removal is unit operation important in Wastewater Pretreatment.Phenol for Waste Water class after pH adjustment, petroleum-type and coal tar etc. toxic substance are separated out in a large number, oil trap 13 major function is separated Phenol for Waste Water class, petroleum-type and coal tar wet goods toxic substance, the utility model oil removal adopts parallel flow intercepter, and supporting rail mounted Oil scraper, oil removal is effective.
3. oil trap 13 water outlet is from flowing into coagulation basin 1, quantitatively adds calcium chloride, carry out breakdown of emulsion to oil in water emulsion in coagulation basin one, and it is 26min that coagulation basin 1 controls the residence time;
4. coagulation basin 1 water outlet enters air flotation pool 16 and removes SS, oil slick and COD, and air-flotation scum enters scum silica frost pond 17 by skimmer device;
5. air flotation pool 16 water outlet is from flowing into Buffer Pool 18, adds potassium primary phosphate at Buffer Pool 18, and by steam heating system control temperature at 35 ~ 38 DEG C, it is 4.5h that Buffer Pool 18 controls the residence time.
The utility model Petroleum Wastewater material is more, remove the effect that thoroughly can not have a strong impact on rear road biochemical process, first remove macromolecular oil slick by oil trap, the dispersion oils in waste water is removed again by air supporting, also insoluble phenol calcium salt is removed simultaneously, also mitigate biochemical pollution load.
By Bubble-floating Method utilizes the micro-bubble of high dispersing as carrier, sticked the pollutent in waste water by these small carriers, makes its density reduce and float to the water surface, thus realize the solid-liquid separation of waste water or the operating process of Liquid liquid Separation.
Compared with gravitational separation process, By Bubble-floating Method tool has the following advantages:
1. By Bubble-floating Method has higher surface load, makes retention time of sewage short, and therefore the usual small volume of air flotation pool, more less than precipitator method floor space, and investment reduces.
2. By Bubble-floating Method operation can remove the organic pollutant of not easily degrading in the low turbid pollutent and waste water do not removed in the precipitator method, and effluent quality is improved.
3. waste water adopts By Bubble-floating Method operation can effectively remove dispersed oil in waste water, oil in water emulsion and dissolving oil, makes above-mentioned grease contamination in air supporting operation food wastewater, pay the water surface and removed, thus reduces grease contamination in waste water.
4. scum silica frost water ratio is low.
The utility model adopts flat flow combined air flotation, and be applicable to the waste water that SS is many, oil-containing is many, the residence time is longer, and regulating power is strong, and removal effect is good.
(2) biochemical treatment
1. Buffer Pool 18 waste water lifting is to EGSB pond 21, and microorganism is fully contacted with organic, and it is 59h that this EGSB pond 21 controls the residence time;
2. EGSB pond 21 is from flowing into hydrolytic tank 1, in hydrolytic tank 1, by the effect of enzyme, the larger molecular organics in waste water is decomposed into small organic molecule, and a plurality of pH adjustment pond 2 28 is set in hydrolytic tank 1, add the basicity produced with anti-nitration reaction in sulfuric acid, the hydrolytic tank 1 control residence time is the residence time in 19.5h, pH adjustment pond 2 28 is all 1h;
EGSB technique has following features:
A. organic loading is high
The organic loading of anaerobic reactor is 2-5 times of UASB organic loading, and the organic loading of UASB is generally 3-8kgCOD/ m3d, and the organic loading of EGSB can reach 6-25kgCOD/ m3d.
B. anti impulsion load
The unexpected increase of influent concentration or the flip-flop of flooding quantity, all can cause load impact to anaerobic reactor.EGSB is because of the effect of its internal recycle, and after the waste water of high density of moment enters reactor, gas production rate increases, air lift amount also can increase, thus internal recycle amount is large, the waste water of high density can dilute by large internal recycle rapidly, thus decreases the impact of organic loading change to reactor.
C. stable
What EGSB anaerobic reactor adopted is anaerobic grain sludge, and the settling velocity of mud is greater than the lift velocity of sewage, and therefore EGSB anaerobic reactor seldom can run mud, therefore stable.
D. initial cost and floor space is saved
Because EGSB organic loading is higher than UASB, EGSB aspect ratio >UASB aspect ratio, therefore process the organic waste water of same scale, the floor area shared by EGSB is far less than the floor space of UASB anaerobic reactor.
E. water distribution is even
Hydraulic load high bottom EGSB and unique water distributor can at utmost guarantee that water distribution is even.
F. running cost is low
EGSB reactor can allocate pH value with recirculation water in time normally running, need little allotment medicament, therefore save running cost.
3. hydrolytic tank 1 water outlet enters Aerobic Pond 1, and arranges a plurality of pH adjustment pond 3 29 in Aerobic Pond 1, adds sodium carbonate respectively, and the Aerobic Pond 1 control residence time is the residence time in 42.4h, pH adjustment pond 3 29 is all 1.43h;
The utility model Aerobic Pond adopts contact oxidation method, microbial biomass is added by biofilm, have that volumetric loading is high, anti impulsion load ability is strong, the treatment time is short, save floor occupying area, biological activity is high, have the advantages such as higher microorganism concn, be conducive to the cultivation of microorganism under high salinity environment; Comparatively be applicable to high salinity waste water process.
4. Aerobic Pond 1 water outlet is from flowing into coagulation basin 2 25, and supplement while basicity further adding sodium carbonate, quantitatively add coagulating agent PAC, enlisted the services of by throw out most of in Aerobic Pond 1, it is 24min that coagulation basin 2 25 controls the residence time;
5. coagulation basin 2 25 water outlet is from flowing to flocculation basin 1, adds PAM, make the integrated macrobead polymkeric substance of the small-particle polymer poly of coagulation basin 2 25 in flocculation basin 1, and it is 24min that flocculation basin 1 controls the residence time;
6. flocculation basin 1 water outlet is from flowing to settling tank 1, in settling tank 1, carry out solid-liquid separation;
(3) chemical electrolysis
1. settling tank 1 water outlet is from flowing to nano-catalytic electrolysis machine 31, by nano-catalytic electrolysis machine 31 electrolysis produce nascent oxygen and status nascendi hydroxyl oxidize Decomposition Wastewater in organism, the biodegradability of further raising waste water, it is 45h that nano-catalytic electrolysis machine 31 controls the residence time.
Catalytic electrolysis technology is the new type water treatment technology integrating catalysis technique and electrochemical techniques, its nano-electrode has higher electro catalytic activity, the free radical in a large number with strong oxidizing property can be produced, the reducing substances in the quick the efficient oxidation water of decomposition of energy in electrolytic process.The nascent state Hydrogen Energy that negative electrode produces forms a large amount of bubbles, along with the floating of gas, can take a large amount of suspended solids out of, reach the effect of solid-liquid separation, thus reduces the pollution index such as COD, colourity, turbidity in waste water further.Catalytic electrolysis technology has that organic matter degradation speed is fast, COD degradation amount is large, suspended substance sedimentation is fast, color removal advantage soon and thoroughly, be combined with traditional waste water treatment process, its original physicochemical techniques alternative, adds the amount of pharmaceutical chemicals without the need to adding pharmaceutical chemicals or minimizing.In addition, by the combination of micro-for catalysis solution technology and traditional biochemical processing and filtering technique, form catalytic electrolysis-AO-filtration combination technique, the water quality after process can reach reuse standard.
Nano-catalytic electrolysis tech has following characteristics:
The efficient removal ability of A. very strong COD
Electrolysis has very strong COD degradation ability; The structure and material that nano-electrode is special simultaneously, adds the degradation property to hardly degraded organic substance, improves the biodegradability energy of water.
B. more stable effluent quality
This system can obtain stable effluent quality and mainly have benefited from the very strong anti-COD impact load ability of core process-nano-catalytic light electrolysis.Electrolyzer remains efficient stable performance always, and the fluctuation of water water quality can be rapidly decomposed, and this characteristic is highly suitable for the industry waste water quality water yields such as dyeing, petrochemical complex, Coal Chemical Industry, fine chemistry industry and fluctuates large feature.
C. lower operation energy consumption
The introducing of catalytic electrolysis special process greatly can reduce electrolysis voltage, thus reduces degraded COD energy consumption; And the more compact process structure of system is also conducive to energy-conservation.
D. simpler and more direct operational management
Catalytic electrolysis belongs to Novel electrolytic technology, there is not the problems such as the electrode corrosion of tradition electrolytic process alive, often replacing, therefore need not change electrode and conversion operating parameter frequently, make daily operational management simpler and more direct.
2. nano-catalytic electrolysis machine 31 water outlet is from flowing to hydrolytic tank 2 32, and by the small organic molecule such as larger molecular organics breaks down into amino acids, carbohydrate in the effect waste water of enzyme in hydrolytic tank 2 32, it is 5.8h that hydrolytic tank 2 32 controls the residence time;
3. hydrolytic tank 2 32 water outlet enters Aerobic Pond 2 33, organism in further degrading waste water, and it is 8.3h that Aerobic Pond 2 33 controls the residence time;
4. Aerobic Pond 2 33 water outlet is from flowing into coagulation basin 3 34, and supplement while basicity further adding sodium carbonate, quantitatively add coagulating agent PAC, enlisted the services of by throw out most of in Aerobic Pond 2 33, it is 24min that coagulation basin 3 34 controls the residence time;
5. coagulation basin 3 34 water outlet is from flowing to flocculation basin 2 35, and in flocculation basin 2 35, add PAM, make the integrated macrobead polymkeric substance of the small-particle polymer poly of coagulation basin 3 34, flocculation basin 2 35 residence time processed is 24min;
6. flocculation basin 2 35 water outlet is from flowing to settling tank 2 36, in settling tank 2 36, carry out solid-liquid separation;
(4) advanced oxidation
1. settling tank two goes out 36 water from flowing to O3 contacted oxidation pond 41, remaining hardly degraded organic substance in oxygenolysis waste water, and it is 3.6h that O3 contacted oxidation pond 41 controls the residence time;
2. O3 contacted oxidation pond 41 water outlet is from flowing to complex biological filter 42, and ensure organism, the SS qualified discharge of water outlet, it is 3.6h that complex biological filter 42 controls the residence time;
3. complex biological filter 42 water outlet can be up to standard, is temporary in clean water basin 43;
The utility model advanced oxidation processes is technique ozone chemistry oxidation, ozone sterilization sterilization, charcoal physical and chemical adsorption and oxidation degradation 4 kinds of technology are integrated.Utilize the preoxidation effect of ozone, organism in preliminary oxidation water of decomposition and other reducing substanceses, to reduce the organic loading of biological carbon filter, ozone oxidation can make the organism chain rupture, the open loop that are difficult to degraded in water simultaneously, larger molecular organics is oxidized to small organic molecule, increase organic biodegradability (biological carbon filter section) and adsorbability in sewage, thus reduce the organic loading of charcoal bed; In addition, because ozone disintegrate in water is oxygen, the dissolved oxygen of biological carbon filter water inlet containing higher concentration, therefore impel aerobic microbiological at charcoal surface colonization, aerobic microbiological with the organism of charcoal surface adsorption for nutriment carries out biological metabolism, thus the organism that not removing only in sewage, and make regeneration of activated carbon to a certain extent, thus there is the ability continuing adsorb organic compound, thus extend work-ing life and the regeneration period of charcoal widely.
After ozonize, carry out charcoal process mainly play three kinds of effects:
A. destroy residual ozone in water, generally occur in several centimeters of initial layer of charcoal;
B. by Adsorption compound or ozonation by-product;
C. by the organic substance in the biological activity degradation of sewage of charcoal surface bacteria.
In sewage treatment process, the effect of ozone and charcoal shows complementarity.Organism and the turbidity of water outlet can be effectively reduced in actual applications, ensure stable effluent quality, up to standard.
The mud of above-mentioned settling tank 1, settling tank 2 36 utilizes high difference pressure regularly to enter sludge sump 22, sludge sump 22 carries out sludge condensation, supernatant liquor is got back to equalizing tank 11 and is processed, mud after concentrated carries out sludge dewatering by pneumatic diaphragm pump suction chamber filter press 51, mud cake outward transport after processed is disposed, and dehydration mother liquor returns equalizing tank 11.
Above are only embodiment of the present utility model, but design concept of the present utility model is not limited thereto, all changes utilizing this design the utility model to be carried out to unsubstantiality, all should belong to the behavior of invading the utility model protection domain.

Claims (6)

1. the treatment unit of brown coal low-temperature pyrolysis waste water, is characterized in that: comprise pretreatment system, biochemical treatment system, chemical electrolysis system and advanced oxidation system;
Described pretreatment system comprises equalizing tank, pH adjusts pond one, oil trap, oil reservoir, coagulation basin one, air flotation pool, scum silica frost pond and Buffer Pool, the water outlet of described equalizing tank connects the water-in that pH adjusts pond one, pH adjusts the water-in of the water outlet connection oil trap in pond one, the oil outlet of oil trap connects oil reservoir, the water outlet of oil trap connects the water-in of coagulation basin one, the water outlet of coagulation basin one connects the water-in of air flotation pool, and the water outlet of air flotation pool connects the water-in of Buffer Pool;
Described biochemical treatment system comprises EGSB pond, sludge sump, hydrolytic tank one, Aerobic Pond one, coagulation basin two, flocculation basin one, settling tank one, pH adjusts pond two and pH adjusts pond three, the water-in in described EGSB pond connects the water outlet of Buffer Pool, the water outlet in EGSB pond connects the water-in of hydrolytic tank one, be provided with a plurality of pH in hydrolytic tank one and adjust pond two, the water outlet of hydrolytic tank one connects the water-in of Aerobic Pond one, be provided with a plurality of pH in Aerobic Pond one and adjust pond three, the water outlet of Aerobic Pond one connects the water-in of coagulation basin two, the water outlet of coagulation basin two connects the water-in of flocculation basin one, the water outlet of flocculation basin one connects the water-in of settling tank one,
Described chemical electrolysis system comprises nano-catalytic electrolysis machine, hydrolytic tank two, Aerobic Pond two, coagulation basin three, flocculation basin two and settling tank two, the water-in of nano-catalytic electrolysis machine connects the water outlet of settling tank one, the water outlet of nano-catalytic electrolysis machine connects the water-in of hydrolytic tank two, the water outlet of hydrolytic tank two connects the water-in of Aerobic Pond two, the water outlet of Aerobic Pond two connects the water-in of coagulation basin three, the water outlet of coagulation basin three connects the water-in of flocculation basin two, and the water outlet of flocculation basin two connects the water-in of settling tank two;
Described advanced oxidation system comprises O3 contacted oxidation pond, complex biological filter and clean water basin, the water-in in O3 contacted oxidation pond connects the water outlet of settling tank two, the water outlet in O3 contacted oxidation pond connects the water-in of complex biological filter, the water outlet of complex biological filter connects the water-in of clean water basin, the water outlet qualified discharge of clean water basin.
2. the treatment unit of brown coal low-temperature pyrolysis waste water as claimed in claim 1, it is characterized in that: the sludge outlet of described settling tank one and the sludge outlet of settling tank two are all attached to described sludge sump, the supernatant liquor outlet of sludge sump is attached to described equalizing tank, and the concentrated solution outlet of sludge sump then connects a pressure filter.
3. the treatment unit of brown coal low-temperature pyrolysis waste water as claimed in claim 1, it is characterized in that: described Aerobic Pond one is provided with a mixture export, this mixture export is connected in described hydrolytic tank one.
4. the treatment unit of brown coal low-temperature pyrolysis waste water as claimed in claim 1, it is characterized in that: bottom, described EGSB pond is provided with water distributing pipe, this middle and upper part, EGSB pond is also provided with triphase separator.
5. the treatment unit of brown coal low-temperature pyrolysis waste water as claimed in claim 1, is characterized in that: the adjacent two interelectrode voltages of described nano-catalytic electrolysis machine are 2 ~ 12V, and current density is 10 ~ 320mA/cm 2.
6. the treatment unit of brown coal low-temperature pyrolysis waste water as claimed in claim 5, it is characterized in that: described nano-catalytic electrolysis machine comprises power supply and electrolyzer, electrode in described electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode, the top layer of nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10 ~ 35nm, and the substrate of nano-catalytic noble electrode is titanium plate or plastic plate.
CN201520129375.8U 2015-03-06 2015-03-06 The treatment unit of brown coal low-temperature pyrolysis waste water Expired - Fee Related CN204474504U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104649522A (en) * 2015-03-06 2015-05-27 福建省首融环境科技有限公司 Treatment device and method of lignite low-temperature carbonization waste water
CN105198156A (en) * 2015-08-21 2015-12-30 中国石油集团东北炼化工程有限公司吉林设计院 Sewage treatment method
CN106800356A (en) * 2016-12-22 2017-06-06 波鹰(厦门)科技有限公司 A kind of advanced treatment of wastewater regeneration device based on biochemical and electrolysis tech

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104649522A (en) * 2015-03-06 2015-05-27 福建省首融环境科技有限公司 Treatment device and method of lignite low-temperature carbonization waste water
CN105198156A (en) * 2015-08-21 2015-12-30 中国石油集团东北炼化工程有限公司吉林设计院 Sewage treatment method
CN106800356A (en) * 2016-12-22 2017-06-06 波鹰(厦门)科技有限公司 A kind of advanced treatment of wastewater regeneration device based on biochemical and electrolysis tech

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