CN104649522B - The treating apparatus of brown coal low temperature distillation waste water - Google Patents
The treating apparatus of brown coal low temperature distillation waste water Download PDFInfo
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- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
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Abstract
The invention discloses a kind for the treatment of apparatus of brown coal low temperature distillation waste water, comprise pretreatment system, biochemical treatment system, chemical electrolysis system and advanced oxidation system. The invention also discloses a kind of processing method of brown coal low temperature distillation waste water, comprise the group technology of pretreatment, biochemical treatment, chemical electrolysis and advanced oxidation. The present invention is according to the water quality characteristics of brown coal low temperature distillation waste water, waste water first carries out the pretreatment such as oil removal, air supporting, after pretreatment, waste water is by the multiplex biochemistry group technology of anaerobism, hydrolysis and aerobic aeration, the last advanced oxidation that passes through again O3 contacted oxidation, complex biological filter, water outlet gets final product qualified discharge.
Description
Technical field
The present invention relates to the technical field of brown coal wastewater treatment, the treating apparatus of specifically brown coal low temperature distillation waste water.
Background technology
In brown coal Low Temperature Pyrolysis Process, in the waste water producing, contain a large amount of harmful substances, as phenol, NH3-N and tar etc., its water quality is as shown in the table:
| Project | Influent quality | Project | Influent quality |
| pH | 10 | NH3-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 poisonous and harmful substances will suppress the breeding of microorganism. Cannot use general wastewater processing technology; According to analytical calculation, in waste water, more than 60% of COD be the contribution of aldehydes matter, wherein volatile phenol accounts for 40%. Adopt burning method processing will consume a large amount of coal gas, energy consumption is high, and water cannot be recycled. The sewage that brown coal low temperature pyrogenation is produced is a technical barrier being badly in need of at present solution.
Conventionally, solvent dephenolize and steaming stripping ammonia are the effective ways of removing brown coal low temperature pyrogenation Phenol for Waste Water and ammonia, and after dephenolize and ammonia still process, Determination of Volatile Phenol in Refinery Wastewater and volatilization ammonia major part are removed, and COD is corresponding minimizing 90% left and right also. And fixing phenol is only removed 50% left and right, 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 poisonous and harmful substance, the biodegradability that simultaneously ensures sewage is the key problem in technology of this wastewater treatment.
Summary of the invention
The invention provides a kind for the treatment of apparatus of brown coal low temperature distillation waste water, its object be to overcome existing brown coal low temperature distillation wastewater biochemical intractability large, cannot use the shortcomings such as general wastewater processing technology.
The present invention adopts following technical scheme:
The treating apparatus of brown coal low temperature distillation waste water, comprises pretreatment system, biochemical treatment system, chemical electrolysis system and advanced oxidation system.
Above-mentioned pretreatment system comprises that regulating reservoir, pH adjust pond one, oil interceptor, oil storage pool, coagulating basin one, flotation tank, scum silica frost pond and Buffer Pool, the delivery port of described regulating reservoir connects the water inlet in pH adjustment pond one, pH adjusts the water inlet of the delivery port connection oil interceptor in pond one, the oil-out of oil interceptor connects oil storage pool, the delivery port of oil interceptor connects the water inlet of coagulating basin one, the delivery port of coagulating basin one connects the water inlet of flotation tank, and the delivery port of flotation tank connects the water inlet of Buffer Pool;
Above-mentioned biochemical treatment system comprises EGSB pond, sludge-tank, hydrolytic tank one, Aerobic Pond one, coagulating basin two, flocculation basin one, sedimentation basin one, pH adjusts pond two and pH adjusts pond three, the water inlet in described EGSB pond connects the delivery port of Buffer Pool, the delivery port in EGSB pond connects the water inlet of hydrolytic tank one, in hydrolytic tank one, be provided with a plurality of pH and adjust pond two, the delivery port of hydrolytic tank one connects the water inlet of Aerobic Pond one, in Aerobic Pond one, be provided with a plurality of pH and adjust pond three, the delivery port of Aerobic Pond one connects the water inlet of coagulating basin two, the delivery port of coagulating basin two connects the water inlet of flocculation basin one, the delivery port of flocculation basin one connects the water inlet of sedimentation basin one,
Above-mentioned chemical electrolysis system comprises nano-catalytic electrolysis machine, hydrolytic tank two, Aerobic Pond two, coagulating basin three, flocculation basin two and sedimentation basin two, the water inlet of nano-catalytic electrolysis machine connects the delivery port of sedimentation basin one, the delivery port of nano-catalytic electrolysis machine connects the water inlet of hydrolytic tank two, the delivery port of hydrolytic tank two connects the water inlet of Aerobic Pond two, the delivery port of Aerobic Pond two connects the water inlet of coagulating basin three, the delivery port of coagulating basin three connects the water inlet of flocculation basin two, and the delivery port of flocculation basin two connects the water inlet of sedimentation basin two;
Above-mentioned advanced oxidation system comprises O3 contacted oxidation pond, complex biological filter and clear water reserviors, the water inlet in O3 contacted oxidation pond connects the delivery port of sedimentation basin two, the delivery port in O3 contacted oxidation pond connects the water inlet of complex biological filter, the delivery port of complex biological filter connects the water inlet of clear water reserviors, the delivery port qualified discharge of clear water reserviors.
Further, the sludge outlet of the sludge outlet of above-mentioned sedimentation basin one and sedimentation basin two is all attached to described sludge-tank, and the supernatant outlet of sludge-tank is attached to described regulating reservoir, and the concentrated solution outlet of sludge-tank connects a filter press.
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 sparge pipe, and this middle and upper part, EGSB pond is also provided with three phase separator.
Further, the adjacent two interelectrode voltages of above-mentioned nano-catalytic electrolysis machine are 2～12V, and current density is 10～320mA/cm2。
Further, above-mentioned nano-catalytic electrolysis machine comprises power supply and electrolytic cell, electrode in electrolytic cell is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic inert electrode, the top layer of nano-catalytic inert electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of nano-catalytic inert electrode is titanium plate or plastic plate.
The processing method that adopts the treating apparatus of above-mentioned brown coal low temperature distillation waste water, comprises the steps:
(1) pretreatment
1. brown coal low temperature distillation waste water, from flowing into regulating reservoir regulating pondage and water quality, is then promoted to pH by elevator pump and adjusts pond one, adds sulfuric acid, and pH value is adjusted to 7 left and right;
2. one water outlet of pH regulating reservoir is carried out oil removal processing from flowing into oil interceptor, carries out water surface frizing by Oil scraper, and oil slick enters oil storage pool, and regularly outward transport is disposed;
3. oil interceptor water outlet, from flowing into coagulating basin one, quantitatively adds calcium chloride in coagulating basin one, and oil emulsion is carried out to breakdown of emulsion, and it is 26min that coagulating basin one is controlled the time of staying;
4. coagulating basin one water outlet enters flotation tank and removes SS, oil slick and COD, and air supporting scum silica frost enters scum silica frost pond by skimmer device;
5. flotation tank water outlet from flow into Buffer Pool, add potassium dihydrogen phosphate at Buffer Pool, and by steam-heating system control temperature at 35～38 DEG C, the Buffer Pool control time of staying is 4.5h;
(2) biochemical treatment
1. Buffer Pool waste water lifting, to EGSB pond, makes microorganism and organic fully contacting, and it is 59h that the time of staying is controlled in this EGSB pond;
2. EGSB pond is from flowing into hydrolytic tank one, the larger molecular organics in waste water is decomposed into small organic molecule by effect by enzyme in hydrolytic tank one, and a plurality of pH are set in hydrolytic tank one adjust pond two, add the basicity producing with anti-nitration reaction in sulfuric acid, it is 19.5h that hydrolytic tank one is controlled the time of staying, and the time of staying that pH adjusts pond two is all 1h;
3. hydrolytic tank one water outlet enters Aerobic Pond one, and a plurality of pH adjustment pond three is set in Aerobic Pond one, adds respectively sodium carbonate, and it is 42.4h that Aerobic Pond one is controlled the time of staying, and the time of staying that pH adjusts pond three is all 1.43h;
4. Aerobic Pond one water outlet is from flowing into coagulating basin two, further supplements in basicity adding sodium carbonate, quantitatively adds coagulant PAC, and most of sediment in Aerobic Pond one is enlisted the services of, and it is 24min that coagulating basin two is controlled the time of staying;
5. coagulating basin two water outlets, from flowing to flocculation basin one, add PAM in flocculation basin one, make the integrated bulky grain polymer of granule polymer poly of coagulating basin two, and it is 24min that flocculation basin one is controlled the time of staying;
6. flocculation basin one water outlet, from flowing to sedimentation basin one, is carried out Separation of Solid and Liquid in sedimentation basin one;
(3) chemical electrolysis
1. sedimentation basin one water outlet is from flowing to nano-catalytic electrolysis machine, organic matter in nascent oxygen and the nascent state hydroxyl oxidize Decomposition Wastewater producing by the electrolysis of nano-catalytic electrolysis machine, the biodegradability that further improves waste water, the nano-catalytic electrolysis machine control time of staying is 45h;
2. the water outlet of nano-catalytic electrolysis machine is from flowing to hydrolytic tank two, and in hydrolytic tank two, by the small organic molecule such as larger molecular organics breaks down into amino acids, carbohydrate in the effect waste water of enzyme, it is 5.8h that hydrolytic tank two is controlled the time of staying;
3. hydrolytic tank two water outlets enter Aerobic Pond two, further organic matter in degrading waste water, and it is 8.3h that Aerobic Pond two is controlled the time of staying;
4. Aerobic Pond two water outlets are from flowing into coagulating basin three, further supplement in basicity adding sodium carbonate, quantitatively add coagulant PAC, and most of sediment in Aerobic Pond two is enlisted the services of, and it is 24min that coagulating basin three is controlled the time of staying;
5. coagulating basin three water outlets, from flowing to flocculation basin two, add PAM in flocculation basin two, make the integrated bulky grain polymer of granule polymer poly of coagulating basin three, and flocculation basin two time of staying processed is 24min;
6. flocculation basin two water outlets, from flowing to sedimentation basin two, are carried out Separation of Solid and Liquid in sedimentation basin two;
(4) advanced oxidation
1. sedimentation basin two water outlets flow to O3 contacted oxidation pond certainly, remaining hardly degraded organic substance in oxidation Decomposition waste water, and it is 3.6h that the time of staying is controlled in O3 contacted oxidation pond;
2. the water outlet of O3 contacted oxidation pond, from flowing to complex biological filter, ensures organic matter, the SS qualified discharge of water outlet, and the complex biological filter control time of staying is 3.6h;
3. complex biological filter water outlet can be up to standard, is temporary in clear water reserviors;
The mud of above-mentioned sedimentation basin one, sedimentation basin two utilizes high difference pressure regularly to enter described sludge-tank, it is concentrated that sludge-tank carries out mud, supernatant is got back to regulating reservoir processing, 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 to regulating reservoir.
From the above-mentioned description of this invention, the invention has the advantages that:
The present invention is according to the water quality characteristics of brown coal low temperature distillation waste water, select the group technology of pretreatment, biochemistry, chemical electrolysis and advanced oxidation, waste water first carries out the pretreatment such as oil removal, air supporting, after pretreatment, waste water is by the multiplex biochemistry group technology of anaerobism, hydrolysis and aerobic aeration, the last advanced oxidation that passes through again O3 contacted oxidation, complex biological filter, water outlet gets final product qualified discharge.
Brief description of the drawings
Fig. 1 is structured flowchart of the present invention.
Detailed description of the invention
The specific embodiment of the present invention is described with reference to the accompanying drawings.
The treating apparatus of brown coal low temperature distillation waste water, with reference to Fig. 1, comprises pretreatment system, biochemical treatment system, chemical electrolysis system and advanced oxidation system.
Pretreatment system comprises that regulating reservoir 11, pH adjust pond 1, oil interceptor 13, oil storage pool 14, coagulating basin 1, flotation tank 16, scum silica frost pond 17 and Buffer Pool 18, the delivery port of regulating reservoir 11 connects the water inlet in pH adjustment pond 1, pH adjusts the water inlet of the delivery port connection oil interceptor 13 in pond 1, the oil-out of oil interceptor 13 connects oil storage pool 14, the delivery port of oil interceptor 13 connects the water inlet of coagulating basin 1, the delivery port of coagulating basin 1 connects the water inlet of flotation tank 16, and the delivery port of flotation tank 17 connects the water inlet of Buffer Pool 18.
Biochemical treatment system comprises EGSB pond 21, sludge-tank 22, hydrolytic tank 1, Aerobic Pond 1, coagulating basin 2 25, flocculation basin 1, sedimentation basin 1, pH adjusts pond 2 28 and pH adjusts pond 3 29, the water inlet in EGSB pond 21 connects the delivery port of above-mentioned Buffer Pool 18, the delivery port in EGSB pond 21 connects the water inlet of hydrolytic tank 1, in hydrolytic tank 1, be provided with a plurality of pH and adjust pond 2 28, the delivery port of hydrolytic tank 1 connects the water inlet of Aerobic Pond 1, in Aerobic Pond 1, be provided with a plurality of pH and adjust pond 3 29, the delivery port of Aerobic Pond 1 connects the water inlet of coagulating basin 2 25, the delivery port of coagulating basin 2 25 connects the water inlet of flocculation basin 1, the delivery port of flocculation basin 1 connects the water inlet of sedimentation basin 1.
Chemical electrolysis system comprises nano-catalytic electrolysis machine 31, hydrolytic tank 2 32, Aerobic Pond 2 33, coagulating basin 3 34, flocculation basin 2 35 and sedimentation basin 2 36, the water inlet of nano-catalytic electrolysis machine 31 connects the delivery port of sedimentation basin 1, the delivery port of nano-catalytic electrolysis machine 31 connects the water inlet of hydrolytic tank 2 32, the delivery port of hydrolytic tank 2 32 connects the water inlet of Aerobic Pond 2 33, the delivery port of Aerobic Pond 2 33 connects the water inlet of coagulating basin 3 34, the delivery port of coagulating basin 3 34 connects the water inlet of flocculation basin 2 35, the delivery port of flocculation basin 2 35 connects the water inlet of sedimentation basin 2 36.
Advanced oxidation system comprises O3 contacted oxidation pond 41, complex biological filter 42 and clear water reserviors 43, the water inlet in O3 contacted oxidation pond 41 connects the delivery port of sedimentation basin 2 36, the delivery port in O3 contacted oxidation pond 41 connects the water inlet of complex biological filter 42, the delivery port of complex biological filter 42 connects the water inlet of clear water reserviors 43, the delivery port qualified discharge of clear water reserviors 43.
The sludge outlet of the sludge outlet of above-mentioned sedimentation basin 1 and sedimentation basin 2 36 is all attached to sludge-tank 22, and the supernatant outlet of sludge-tank 22 is attached to regulating reservoir 11, and the concentrated solution outlet of sludge-tank 22 connects a filter press 51. Above-mentioned Aerobic Pond 1 is provided with a mixture export, and this mixture export is connected in hydrolytic tank 1. 21 bottoms, above-mentioned EGSB pond are provided with sparge pipe, by water uniform distribution, in water inlet, take into account the effect that mixes and stir, and make microorganism and organic fully contacting, and have ensured good pollutant removal; These 21 middle and upper parts, EGSB pond are also provided with three phase separator, and gas, liquid, solid three-phase is separated.
The adjacent two interelectrode voltages of above-mentioned nano-catalytic electrolysis machine 31 are 2～12V, and current density is 10～320mA/cm2. Nano-catalytic electrolysis machine 31 comprises power supply and electrolytic cell, electrode in electrolytic cell is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic inert electrode, wherein, the top layer of nano-catalytic inert electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of nano-catalytic inert electrode is titanium plate or plastic plate.
The processing method of the treating apparatus of above-mentioned brown coal low temperature distillation waste water, comprises the steps:
(1) pretreatment
1. brown coal low temperature distillation waste water, from flowing into regulating reservoir 11 regulating pondages and water quality, is then promoted to pH by elevator pump and adjusts pond 1, adds sulfuric acid, and pH value is adjusted to 7 left and right.
The discharge of waste water is intermittence and unsettled, therefore, the waste water water yield, change of water quality are larger round the clock, as directly entered treatment system, follow-up each treatment facility are normally brought into play to its purification function unfavorable, even may be destroyed, each parameter is also difficult to control, and treatment effect is unstable, therefore regulating reservoir is set before waste water enters treatment system, in order to carry out the adjusting of the water yield and the homogenizing of water quality, to ensure normally carrying out of waste water. The object that regulating reservoir is set in waste water disposal facility is: the first, fully composite waste, and balanced water quality and quantity, prevents the sharply variation for the treatment of system load; The second, store the water yield, be convenient to the processing of systematic quantification continous-stable; Three,, when not having wastewater streams fashionable, still can continue input waste water to biological treatment system; Four, prevent that high concentration noxious material from entering biological treatment system; Five,, in the time there are abnormal conditions, regulating reservoir can store waste water temporarily.
2. one 12 water outlets of pH regulating reservoir are carried out oil removal processing from flowing into oil interceptor 13, carry out water surface frizing by Oil scraper, and oil slick enters oil storage pool 14, and regularly outward transport is disposed.
Oil removal is unit operations important in Wastewater Pretreatment. Phenol for Waste Water class, petroleum-type and coal tar after pH adjusts etc. noxious material is separated out in a large number, oil interceptor 13 major functions are to separate Phenol for Waste Water class, petroleum-type and coal tar wet goods noxious material, oil removal of the present invention adopts parallel flow intercepter, supporting rail mounted Oil scraper, and oil removal is effective.
3. oil interceptor 13 water outlets, from flowing into coagulating basin 1, quantitatively add calcium chloride in coagulating basin one, and oil emulsion is carried out to breakdown of emulsion, and it is 26min that coagulating basin 1 is controlled the time of staying;
4. coagulating basin one 15 water outlets enter flotation tank 16 and remove SS, oil slick and COD, and air supporting scum silica frost enters scum silica frost pond 17 by skimmer device;
5. flotation tank 16 water outlets from flow into Buffer Pool 18, add potassium dihydrogen 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 is controlled the time of staying.
Petroleum Wastewater material of the present invention 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 interceptor, then remove the dispersion oils in waste water by air supporting, also insoluble phenol calcium salt is removed simultaneously, also alleviated biochemical pollutional load.
By Bubble-floating Method is to utilize the micro-bubble of high degree of dispersion as carrier, sticks the pollutant in waste water by these small carriers, its density is reduced and float to the water surface, thereby realizing the Separation of Solid and Liquid of waste water or the operating process that liquid liquid separates.
Compare with gravitational separation process, By Bubble-floating Method tool has the following advantages:
1. By Bubble-floating Method has higher surface loading, makes retention time of sewage short, and therefore the common small volume of flotation tank, more less than precipitation method floor space, and investment reduces.
2. By Bubble-floating Method operation can be removed and in the low turbid pollutant not removed in the precipitation method and waste water, is difficult for the organic pollution of degrading, and effluent quality is improved.
3. waste water adopts By Bubble-floating Method operation can effectively remove dispersed oil in waste water, oil emulsion and dissolved oil, makes above-mentioned grease contamination in air supporting operation food wastewater, pay the water surface and be removed, thereby reduces grease contamination in waste water.
4. scum silica frost moisture content is low.
The present invention adopts flat flow combined air flotation, is applicable to the waste water that SS is many, oil-containing is many, and the time of staying is longer, and regulating power is strong, and removal effect is good.
(2) biochemical treatment
1. Buffer Pool 18 waste water liftings, to EGSB pond 21, make microorganism and organic fully contacting, and it is 59h that the time of staying is controlled in this EGSB pond 21;
2. EGSB pond 21 is from flowing into hydrolytic tank 1, the larger molecular organics in waste water is decomposed into small organic molecule by effect by enzyme in hydrolytic tank 1, and a plurality of pH are set in hydrolytic tank 1 adjust pond 2 28, add the basicity producing with anti-nitration reaction in sulfuric acid, it is 19.5h that hydrolytic tank 1 is controlled the time of staying, and the time of staying that pH adjusts 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 inflow, all can cause load impact to anaerobic reactor. The effect of EGSB because circulating in it, the waste water of the high concentration of moment enters after reactor, and gas production increases, air lift amount also can increase, thereby interior internal circulating load is large, large interior circulation can be diluted the waste water of high concentration rapidly, changes the impact to reactor thereby reduced organic loading.
C. stable
What EGSB anaerobic reactor adopted is anaerobic grain sludge, and the sinking speed of mud is greater than the rate of climb of sewage, and therefore EGSB anaerobic reactor seldom can run mud, therefore stable.
D. save capital expenditure and floor space
Because EGSB organic loading is higher than UASB, EGSB ratio of height to diameter > UASB ratio of height to diameter, therefore process the organic wastewater of same scale, the shared floor area of EGSB is far less than the floor space of UASB anaerobic reactor.
E. water distribution is even
High hydraulic load and the unique water-locator in EGSB bottom can at utmost guarantee that water distribution is even.
F. operating cost is low
EGSB reactor in the time normally moving, can allocate pH value with recirculation water, need little allotment medicament, therefore saved operating cost.
3. hydrolytic tank one 23 water outlets enter Aerobic Pond 1, and a plurality of pH adjustment pond 3 29 is set in Aerobic Pond 1, add respectively sodium carbonate, and it is 42.4h that Aerobic Pond 1 is controlled the time of staying, and the time of staying that pH adjusts pond 3 29 is all 1.43h;
Aerobic Pond of the present invention adopts contact oxidation method, increase microbial biomass by biofilm, have that volumetric loading is high, anti impulsion load ability is strong, the processing time is short, save floor occupying area, biologically active is high, have the advantages such as higher microorganism concn, be conducive to the cultivation of microorganism under high salinity environment; Be applicable to high salinity waste water processing.
4. Aerobic Pond one 24 water outlets are from flowing into coagulating basin 2 25, further supplement in basicity adding sodium carbonate, quantitatively add coagulant PAC, and most of sediment in Aerobic Pond 1 is enlisted the services of, and it is 24min that coagulating basin 2 25 is controlled the time of staying;
5. coagulating basin 2 25 water outlets, from flowing to flocculation basin 1, add PAM in flocculation basin 1, make the integrated bulky grain polymer of granule polymer poly of coagulating basin 2 25, and it is 24min that flocculation basin 1 is controlled the time of staying;
6. flocculation basin one 26 water outlets, from flowing to sedimentation basin 1, are carried out Separation of Solid and Liquid in sedimentation basin 1;
(3) chemical electrolysis
1. sedimentation basin one 27 water outlets are from flowing to nano-catalytic electrolysis machine 31, organic matter in nascent oxygen and the nascent state hydroxyl oxidize Decomposition Wastewater producing by 31 electrolysis of nano-catalytic electrolysis machine, the biodegradability that further improves waste water, it is 45h that nano-catalytic electrolysis machine 31 is controlled the time of staying.
Catalytic electrolysis technology is the new type water treatment technology that integrates catalysis technique and electrochemical techniques, its nano-electrode has higher electro catalytic activity, in electrolytic process, can produce the free radical in a large number with strong oxidizing property, fast the reducing substances in the efficient oxidation decomposition water. 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 solid suspensions out of, reaches the effect of Separation of Solid and Liquid, thereby further reduces the pollution indexs such as COD in waste water, colourity, turbidity. 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, alternative its original physicochemical techniques, without the amount that adds chemicals or minimizing and add chemicals. In addition, by micro-catalysis solution technology and traditional biochemical processing and the combination of filtering technique, form catalytic electrolysis-AO-and filter group technology, water quality after treatment can reach reuse standard.
Nano-catalytic electrolysis tech has following characteristics:
A. the ability that efficiently removes of very strong COD
Electrolysis has very strong COD degradation capability; The special structure and material of nano-electrode, has increased the degradation property to hardly degraded organic substance simultaneously, has improved 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 the micro-electrolysis of core process-nano-catalytic. Electrolyzer is keeping efficient stable performance always, and the fluctuation of water water quality can be decomposed rapidly, and this characteristic is highly suitable for the industry waste water quality water yields such as dyeing, petrochemical industry, Coal Chemical Industry, the fine chemistry industry large feature that fluctuates.
C. lower operation energy consumption
The introducing of catalytic electrolysis special process can greatly reduce decomposition voltage, thereby 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 electrolysis tech, does not have the problem such as electrode corrosion, frequent replacing of tradition electrolysis alive, therefore needn't change frequently electrode and conversion operational factor, makes daily operational management simpler and more direct.
2. 31 water outlets of nano-catalytic electrolysis machine are from flowing to hydrolytic tank 2 32, and in hydrolytic tank 2 32, by the small organic molecule such as larger molecular organics breaks down into amino acids, carbohydrate in the effect waste water of enzyme, it is 5.8h that hydrolytic tank 2 32 is controlled the time of staying;
3. hydrolytic tank 2 32 water outlets enter Aerobic Pond 2 33, further organic matter in degrading waste water, and it is 8.3h that Aerobic Pond 2 33 is controlled the time of staying;
4. Aerobic Pond 2 33 water outlets are from flowing into coagulating basin 3 34, further supplement in basicity adding sodium carbonate, quantitatively add coagulant PAC, and most of sediment in Aerobic Pond 2 33 is enlisted the services of, and it is 24min that coagulating basin 3 34 is controlled the time of staying;
5. coagulating basin 3 34 water outlets, from flowing to flocculation basin 2 35, add PAM in flocculation basin 2 35, make the integrated bulky grain polymer of granule polymer poly of coagulating basin 3 34, and flocculation basin 2 35 time of staying processed is 24min;
6. flocculation basin 2 35 water outlets, from flowing to sedimentation basin 2 36, are carried out Separation of Solid and Liquid in sedimentation basin 2 36;
(4) advanced oxidation
1. sedimentation basin two goes out 36 water from flowing to O3 contacted oxidation pond 41, remaining hardly degraded organic substance in oxidation Decomposition waste water, and it is 3.6h that the time of staying is controlled in O3 contacted oxidation pond 41;
2. 41 water outlets of O3 contacted oxidation pond, from flowing to complex biological filter 42, ensure organic matter, the SS qualified discharge of water outlet, and it is 3.6h that complex biological filter 42 is controlled the time of staying;
3. complex biological filter 42 water outlets can be up to standard, is temporary in clear water reserviors 43;
Advanced oxidation processes of the present invention is the technique that ozone chemistry oxidation, ozone sterilization sterilization, charcoal physical and chemical adsorption and 4 kinds of technology of oxidation degradation are integrated. Utilize the pre-oxidation effect of ozone, organic matter and other reducing substanceses in preliminary oxidation Decomposition water, to reduce the organic loading of biological carbon filter, ozone oxidation can make organic matter chain rupture, the open loop of hard degradation in water simultaneously, larger molecular organics is oxidized to small organic molecule, increase organic biodegradability (biological carbon filter section) and adsorbability in sewage, thereby reduce the organic loading of charcoal bed; In addition, because ozone is decomposed into voluntarily oxygen in water, the biological carbon filter dissolved oxygen that contains higher concentration of intaking, therefore impel aerobic microbiological to carry out biological metabolism in charcoal surface breeding, aerobic microbiological taking the organic matter of charcoal adsorption as nutriment, thereby not only remove the organic matter in sewage, and make to a certain extent regenerating active carbon, thus there is the ability that continues adsorb organic compound, thus service life and the regeneration period of charcoal extended widely.
After ozone treatment, carry out charcoal and process three kinds of effects of main performance:
A. destroy residual ozone in water, generally occur in several centimeters of initial charcoal layer;
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 disposal process, the effect of ozone and charcoal shows complementarity. Can effectively reduce in actual applications organic matter and the turbidity of water outlet, ensure stable effluent quality, up to standard.
The mud of above-mentioned sedimentation basin 1, sedimentation basin 2 36 utilizes high difference pressure regularly to enter sludge-tank 22, it is concentrated that sludge-tank 22 carries out mud, supernatant is got back to regulating reservoir 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 to regulating reservoir 11.
Above are only the specific embodiment of the present invention, but design concept of the present invention is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the present invention, all should belong to the behavior of invading protection domain of the present invention.
Claims (6)
1. the treating apparatus of brown coal low temperature distillation waste water, is characterized in that: comprise pretreatment system, biochemical treatment system, chemical electrolysis system and advanced oxidation system;
Described pretreatment system comprises that regulating reservoir, pH adjust pond one, oil interceptor, oil storage pool, coagulating basin one, flotation tank, scum silica frost pond and Buffer Pool, the delivery port of described regulating reservoir connects the water inlet in pH adjustment pond one, pH adjusts the water inlet of the delivery port connection oil interceptor in pond one, the oil-out of oil interceptor connects oil storage pool, the delivery port of oil interceptor connects the water inlet of coagulating basin one, the delivery port of coagulating basin one connects the water inlet of flotation tank, and the delivery port of flotation tank connects the water inlet of Buffer Pool;
Described biochemical treatment system comprises EGSB pond, sludge-tank, hydrolytic tank one, Aerobic Pond one, coagulating basin two, flocculation basin one, sedimentation basin one, pH adjusts pond two and pH adjusts pond three, the water inlet in described EGSB pond connects the delivery port of Buffer Pool, the delivery port in EGSB pond connects the water inlet of hydrolytic tank one, in hydrolytic tank one, be provided with a plurality of pH and adjust pond two, the delivery port of hydrolytic tank one connects the water inlet of Aerobic Pond one, in Aerobic Pond one, be provided with a plurality of pH and adjust pond three, the delivery port of Aerobic Pond one connects the water inlet of coagulating basin two, the delivery port of coagulating basin two connects the water inlet of flocculation basin one, the delivery port of flocculation basin one connects the water inlet of sedimentation basin one,
Described chemical electrolysis system comprises nano-catalytic electrolysis machine, hydrolytic tank two, Aerobic Pond two, coagulating basin three, flocculation basin two and sedimentation basin two, the water inlet of nano-catalytic electrolysis machine connects the delivery port of sedimentation basin one, the delivery port of nano-catalytic electrolysis machine connects the water inlet of hydrolytic tank two, the delivery port of hydrolytic tank two connects the water inlet of Aerobic Pond two, the delivery port of Aerobic Pond two connects the water inlet of coagulating basin three, the delivery port of coagulating basin three connects the water inlet of flocculation basin two, and the delivery port of flocculation basin two connects the water inlet of sedimentation basin two;
Described advanced oxidation system comprises O3 contacted oxidation pond, complex biological filter and clear water reserviors, the water inlet in O3 contacted oxidation pond connects the delivery port of sedimentation basin two, the delivery port in O3 contacted oxidation pond connects the water inlet of complex biological filter, the delivery port of complex biological filter connects the water inlet of clear water reserviors, the delivery port qualified discharge of clear water reserviors.
2. the treating apparatus of brown coal low temperature distillation waste water as claimed in claim 1, it is characterized in that: the sludge outlet of the sludge outlet of described sedimentation basin one and sedimentation basin two is all attached to described sludge-tank, the supernatant outlet of sludge-tank is attached to described regulating reservoir, and the concentrated solution outlet of sludge-tank connects a filter press.
3. the treating apparatus of brown coal low temperature distillation waste water as claimed in claim 1, is characterized in that: described Aerobic Pond one is provided with a mixture export, and this mixture export is connected in described hydrolytic tank one.
4. the treating apparatus of brown coal low temperature distillation waste water as claimed in claim 1, is characterized in that: bottom, described EGSB pond is provided with sparge pipe, and this middle and upper part, EGSB pond is also provided with three phase separator.
5. the treating apparatus of brown coal low temperature distillation 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/cm2。
6. the treating apparatus of brown coal low temperature distillation waste water as claimed in claim 5, it is characterized in that: described nano-catalytic electrolysis machine comprises power supply and electrolytic cell, electrode in described electrolytic cell is nano-catalytic inert electrode, the top layer of nano-catalytic inert electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of nano-catalytic inert electrode is titanium plate or plastic plate.
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| CN201510099447.3A CN104649522B (en) | 2015-03-06 | 2015-03-06 | The treating apparatus of brown coal low temperature distillation waste water |
| CN201610057818.6A CN105712574B (en) | 2015-03-06 | 2015-03-06 | The processing method of lignite low temperature distillation waste water |
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