CN2839261Y - Arrangement for aerating biological filtering tank coupling ozone oxidation treating petrochemical sewage - Google Patents
Arrangement for aerating biological filtering tank coupling ozone oxidation treating petrochemical sewage Download PDFInfo
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- CN2839261Y CN2839261Y CNU2005200664969U CN200520066496U CN2839261Y CN 2839261 Y CN2839261 Y CN 2839261Y CN U2005200664969 U CNU2005200664969 U CN U2005200664969U CN 200520066496 U CN200520066496 U CN 200520066496U CN 2839261 Y CN2839261 Y CN 2839261Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The utility model relates to a petrochemical organic sewage treating device by the biological oxidation coupled ozone oxidation method for an isolated type aeration biological filtering tank. The device comprises a biological filtering tank treating device and an ozone oxidation treating device, wherein the biological filtering tank treating device comprises a filler layer, the ozone oxidation treating device comprises an ozone inlet device and an air inlet device, the ozone oxidation treating device is an isolated aeration barrel of which the periphery is isolated from the biological filtering tank treating device, the upper end and the lower end of the ozone oxidation treating device are respectively communicated with the biological filtering tank treating device, and the upper end of an outer shell of an aeration biological filtering tank reaction device is provided with an inlet of petrochemical sewage and an outlet of petrochemical sewage respectively. The utility model realizes the simultaneous implementation of biological and advanced oxidation sewage treatment processes in one reactor; thereby, the utility model has the advantages of simple technique of waste water treatment and reduced treatment cost. The combination between an isolated type aeration biological filtering tank and the ozone oxidation technology effectively solves the problems of the advanced treatment and the reuse of high concentration difficult degradation sewage or water in petrochemical enterprises.
Description
Technical field
The utility model relates to sewage treatment area, particularly the bio-oxidation lotus root is closed ozonation technology and handles petrochemical enterprise organic sewage device, specifically is the biological aerated filter process of sewage and ozone oxidation process lotus root to be combined in the reaction unit realize sewage disposal.
Background technology
China is the country of a water resources shortage, and 2500 cubic metres of water resources ownership per capitas are 1/5th of world's per capita share, and urban water shortage is on the rise, existing more than 300 city serious water shortage.China's year discharging industrial sewage is about 210 billion cubic meters, processing rate less than 80% wherein, and compliance rate is lower than 60%, and the service water reclamation rate is lower than 30%, and water treatment and water use efficiency technology all fail to reach the level of medium-developed country.So development is gone down, and the achievement that has obtained since the reform and opening-up is subjected to probably comprising the restriction of resource aspects such as water and can't advances, even can have a strong impact on the realization of goal of constructing well-off society.Along with the proposition of Sustainable development and recycling economy, the Chinese government and environmental administration develop comprehensive utilization of water resources, water treatment and reuse pay attention to day by day thereof.At features such as pollutent structure, form, content in the sewage, the green technology of exploitation and employing novel practical, industrial sewage is implemented efficient the processing, realize the sludge reduction target when reducing the industrial sewage discharging, the new way of pollutent conversion process in the research sewage treatment process, influencing each other and the interaction in efficient control process of different pollution substances is to solve China's ambient water pollution problem.
China's rapid economic development is growing to the demand of the energy, and is following, to the ratio of low-quality high-sulpur crude processing and utilization also with increasing.Thereby cause the high sulfur-bearing of petrochemical enterprise, nitrogenous, the quantity discharged that contains the phenol high concentration organic sewage to increase, this will make petroleum chemical plant especially the pressure of refinery water pollution control strengthen day by day.The refinery high-concentration sewage mainly comes from the distillate soda finishing workshop section in the processing of normal decompression, hydrogenation, catalytic reforming and cracking, crude oil and the washing water of processed oil, its COD
Cr～2000mg/l, BOD
5～600mg/l, sulfide＞100mg/l, phenol＞50mg/l, ammonia nitrogen＞40mg/l, quantity discharged is bigger, and the Pollutant levels fluctuation is also big.Handle if after neutralizing, directly enter biochemical system, or enter traditional biological activity sludge sump processing, to the impact of biosystem, especially high sulfur-bearing, phenol-containing wastewater destroy biosystem, though make processing can't carry out or can handle, can't qualified discharge.At present domesticly enter biochemical system again after having minority producer to adopt separately to relax the pre-treatment of air wet oxidation (WAO) technology, external then enter follow-up biochemical system again after the pre-treatment of employing advanced oxidation processes earlier.High-level oxidation technology comprises ozone oxidation and hydrogen peroxide oxidation, and the device of ozone oxidation comprises ozone access to plant and air admission device.The ozone oxidation method is because current consumption is big, especially at present China with abroad compare, the electricity charge higher (U.S. 1kw.hr/$0.06, China 1kw.hr/0.69 unit), the energy shortage epoch, single ozonation technology was to be not suitable for China's national situation; Peroxide oxidizing method causes dosing very big because sewage load is big, and the expense height can't be accepted enterprise.Adopt WAO technology pre-treating high concentration organic sewage, can cut down sulphur and phenol content in the sewage significantly, but, make this technology one-time investment expense and working cost very high because quantity of wastewater effluent is big.Obviously, a large amount of organic sewages is unfavorable to the present oil refining enterprise of China to adopt the WAO technology to handle so.
The utility model content
The purpose of this utility model is to overcome prior art and carries out the high shortcoming of complex process, processing cost that biology and advanced oxidation bring in two different system, and the device of a kind of aeration and biological oxidation filter tank treating petrochemical sewage by coupling ozone oxidation is provided.
The purpose of this utility model is achieved through the following technical solutions:
The device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool, this device comprises biological filter treatment unit and ozone Oxidation Treatment device, the biological filter treatment unit comprises packing layer, the ozone Oxidation Treatment device comprises ozone access to plant and air admission device, the ozone Oxidation Treatment device is isolated with the biological filter treatment unit around being, the isolated aeration tube that its top and bottom are communicated with the biological filter treatment unit respectively, BAF reaction unit shell upper end has petrifaction sewage import and outlet.
For further realizing the purpose of this utility model:
The filler of packing layer can adopt the general biologic packing material of such technology, the utility model preferably adopt high-density, high-ratio surface, diameter is the biologic packing material of 6～8mm, filler is formed by high temperature sintering by the porous ceramic bead.BAF reaction unit shell is prepared from by etch-proof nickel steel materials processing.The device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool also comprises back-purge system, and back flushing comprises back flushing tracheae and back flushing coil pipe; The back flushing coil pipe is positioned at the packing layer bottom, and with the backwash gas pipe coupling, the back flushing tracheae is connected with outer air duct.
The air admission device of the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool preferably adopts aeration head, aeration tube and outer air duct to connect and compose, and aeration head is positioned at isolated aeration tube bottom, is connected with aeration tube, and aeration tube is connected with outer air duct.The ozone access to plant preferably adopts ozone mixed gas sparger and ozone gas mixture inlet tube to connect and compose.
The treating petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool device also preferably includes back-purge system, and described back-purge system comprises back flushing tracheae, back flushing water-in, top blowdown and backwashing water outlet, bottom mud discharging mouth and back flushing coil pipe; Described back flushing water-in and top blowdown and backwashing water outlet are positioned at BAF reaction unit shell upper end, and top blowdown and backwashing water outlet are preferably placed at 20mm place, water outlet bottom; The bottom mud discharging mouth be positioned at BAF reaction unit shell lower end, described back flushing coil pipe is positioned at the packing layer bottom, and with the backwash gas pipe coupling, the back flushing tracheae is connected with outer air duct.
The biological filter treatment unit also preferably includes porous support plate and stone riprap layer, stacks the stone riprap layer on the described porous support plate, and described stone riprap layer is positioned at the lower end of packing layer.
The device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool also preferably includes the hand hole that is used to keep in repair, and described hand hole is positioned at the lower end of BAF reaction unit shell.
The packing layer filler of the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool preferably adopt high-density, high-ratio surface, diameter is the biologic packing material of 6～8mm.
The device of aeration and biological oxidation of the present utility model filter tank treating petrochemical sewage by coupling ozone oxidation comprises the technology of two aspects.
(1) isolated aeration biological filtering tank process: replace traditional activated sludge process with biological aerated filter process, biology filter (filling out) material with high-density, high-ratio surface, diameter is 6～8mm, replace traditional low density, low specific surface elasticity of plastics filler, the biofilter material upper layer is a vesicular structure, surface irregularity, its biological attachment performance has obtained large increase, and biomembranous formation becomes very easy; The filtrate gap is little, and formed microbial film is thin, when current pass packing layer, is disperseed by packed height, and fully contacts with microbial film, and the biomass active in the filler is given full play to, and the mass transfer velocity in the packing layer improves greatly.In BAF, adopt novel isolated aeration process, air enters inner core (isolated aeration tube) system from the aeration cylinder bottom, the biological filter top of sewage outside aeration cylinder enters, and biological filter (reactor) is made of reaction zone and aeration zone two portions.Gas (aeration flow rate) water (sewage flow rate) is than being 6～12: 1, fluid flow in the aeration cylinder is a complete mixing flow, tube inner fluid density less (because of fluid contains a large amount of gases) rises along aeration cylinder, and the biological filter fluid descends along the filter tank greatly because of density, and fluid flow is a piston flow.In aeration zone and reaction zone, formed big working cycle by the isolated aeration technology.
(2) ozonation technology: directly the mixed gas with ozonize sprays into isolated aeration district, ozone mixed gas flow rate is about 10%～20% of aeration rate (flow rate), the voltage of ozone concn and operational condition such as ozonizer, the specific gas flow rate that enters ozonizer is relevant, can regulate according to the kind and the concentration of pollutent in the sewage, to Pollutant levels height or difficult degradation pollutent, improve the operating voltage of ozonizer, thereby the ozone concn in the mixed gas is improved, to light polluted water advanced treatment, then reduce operating voltage, ozone concn is reduced.The mixed gas that big internal circulating load and aeration rate make ozonize in the system is dispersed in the water body rapidly, ozone oxidation is mainly carried out in the aeration zone, after arriving the living oxidizing reaction of aeration cylinder top and sewage water inlet hybrid concurrency, concentration further reduces, and enters biological filter 90% above ozone and decomposes.
Lotus root described in the utility model is closed technology and refers to finish bio-oxidation and ozone oxidation process in a reactor.
Compared with prior art, the utility model not only can make the operating procedure process simple, and processing cost reduces, and has following advantage:
1, traditional BAF is improved, it is divided into reaction zone and aeration zone, gas was evenly distributed in the liquid better after isolated aeration made aeration, help the mass transfer between the gas-liquid, reduce the diffusional resistance of pollutent at reaction zone, prevent that bubble from washing away the loss that causes because of under-nutrition or long and poky biomass of microbial metabolism phase, make the filler in the whole oxidation pond can both form the high-activity biological film, reach the purpose that pollutent is efficiently handled.
2, the isolated aeration technological process forms big water circulation mixing effect, dilute the Pollutant levels of water inlet rapidly, prevent the too high detrimentally affect that causes of local pollution substrate concentration, the opposing of raising system is because of the impact of water inlet Pollutant levels fluctuation to biological oxidation process.
3, solved the problem that prior biological oxidation and advanced oxidation must carry out respectively in different reaction units, make technological process compacter and simple, the utilization ratio of ozone further improves, ozone decomposes the oxygen that produces also can improve the system dissolves oxygen concn, the one-time investment and the working cost of system further reduce, and promote bio-oxidation and advanced oxidation and use in wastewater treatment.
4, adopt the combined water and air backwash technology, not only backwash effect is good, prolongs backwashing period, and saves the back flushing water yield 40～60% than existing simple water flushing, reduces operational cost.
5, this technology has that to produce mud few, realizes sludge reduction, for light polluted water advanced treatment and reuse process, need not to carry out the back flushing characteristics.
Description of drawings
Fig. 1 is that the isolated BAF lotus root of the utility model is closed ozone oxidation method processing petrochemical effluent device synoptic diagram;
Fig. 2 is a porous support plate horizontal sectional view among Fig. 1;
Fig. 3 is an ozone mixed gas sparger vertical view among Fig. 1;
Fig. 4 is an aeration head vertical view among Fig. 1.
Shown in the figure: 1-bottom mud discharging mouth 2-stone riprap floor 3-aeration head 4-ozone mixed gas sparger 5-ozone gas mixture inlet tube 6-back flushing tracheae 7-top blowdown and outer air duct 10-aeration tube 11-sewage import 12-packing layer (bio-oxidation district) the 13-back flushing water-in 14-nickel steel treater shell 15-isolated aeration tube 16-hand hole 17-back flushing coil pipe 18-porous support plate of backwashing water outlet 8-water outlet 9-
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail, but the claimed scope of the utility model is not limited to the scope that embodiment represents.
High density oil refining sewerage (buck alkaline residue) pre-treatment.
As shown in Figure 1, the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool comprises biological filter treatment unit and ozone Oxidation Treatment device, the biological filter treatment unit comprises packing layer 12, the ozone Oxidation Treatment device comprises ozone access to plant and air admission device, the ozone Oxidation Treatment device is isolated the isolated aeration tube 15 that its top and bottom are communicated with the biological filter treatment unit respectively with the biological filter treatment unit around being.The air admission device adopts aeration head 3, aeration tube 10 and outer air duct 9 to connect and compose.Aeration head 3 is positioned at isolated aeration tube 15 bottoms, is connected with aeration tube 10, and aeration tube 10 is connected with outer air duct 9.As shown in Figure 4, aeration head 3 is a porous coil pipe.The ozone access to plant is connected and composed by ozone mixed gas sparger 4 and ozone gas mixture inlet tube 5.As shown in Figure 3, ozone mixed gas sparger 4 makes the ozone-air mixture that injects by ozone gas mixture inlet tube 5 be evenly distributed on liquid for having porous U-shaped pipe.BAF reaction unit shell 14 is prepared from by bilge water resisting especially buck corrosive nickel steel materials processing.Water out 8 after the upper end of BAF reaction unit shell 14 has petrifaction sewage import 11, processing, top blowdown and backwashing water outlet 7 and backwashing water import 13, have the hand hole 16 of bottom mud discharging mouth 1 and maintenance usefulness in its lower end, top blowdown and backwashing water outlet 7 are positioned at 20mm place, water outlet 8 bottom.In BAF reaction unit shell, packing layer 12 is housed, filler employing high-density, high-ratio surface, diameter is the biologic packing material of 6～8mm, filler is formed by high temperature sintering by the porous ceramic bead.Stack stone layer 2 below packing layer 12, stone layer 2 is deposited on the porous support plate 18, and as shown in Figure 2, porous support plate 18 is a water-permeable good metal reticulated structure.The device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool also is provided with back-purge system, and back-purge system comprises back flushing water-in 13, back flushing tracheae 6, mud discharging mouth 1 and back flushing coil pipe 17; Back flushing coil pipe 17 is positioned at packing layer 12 bottoms, and is connected with back flushing tracheae 6, and back flushing tracheae 6 is connected 9 with outer air duct.Back flushing coil pipe 17 makes the backwash gas (air) that enters system by backwash tube 6 can be evenly distributed in the backwashing water similar aeration head 3., mud is discharged outside the reaction unit from bottom mud discharging mouth 1 just in case stop up when system then water washes.
Sewage enters the packing layer 12 in bio-oxidation district by water inlet 11, biooxidation reactions mainly carries out in this district, and then enter isolated aeration device 15 aeration aeratings and carry out ozone oxidation, after the isolated aeration district carries out ozone and ozone oxidation, the air-water mixture that rises from isolated aeration tube 15 enters packing layer 12 again, form circulation, subsequently, the treated sewage part of coming out from isolated aeration device 15 upper ends is discharged from water outlet 8, major part is mixed (internal circulating load is about 6 times of flooding quantity) with the sewage of sewage import, carries out circular treatment again.
When using this device, high density oil refining sewerage (as the buck alkaline residue) is pumped into the packing layer 12 in bio-oxidation district by sewage import 11, and contact, filter and preliminary bio-oxidation is handled with the filling surface microorganism; Enter with in bottom, bio-oxidation district is communicated with and has the isolated aeration tube 15 of ozone and air admission device through stone riprap floor 2 and porous support plate 18 through sewage that preliminary bio-oxidation is handled.At this moment, air enters isolated aeration tube 15 by aeration tube 10 through aeration head 3 by air compressor, carry out oxygenation by 3 pairs of isolated aeration tube 15 liquid of aeration head, gas is evenly distributed in the liquid, and thorough mixing, gas-water ratio is 6～12: 1 (ratio of aeration rate and flooding quantity, volumetric flow rate than); Simultaneously, ozone and Air mixing gas (ozonized air) inject the isolated aeration district by ozone gas mixture inlet tube 5 through ozone mixed gas sparger 4, are evenly distributed in the fluid rapidly.By gas lift in the isolated aeration tube 15, the interior sewage of aeration cylinder is risen from bottom to top, mass transfer and ozone oxidation process between this process generation gas-liquid, ozone is along with uphill process concentration progressively reduces, decomposing the oxygen that produces has increased the system dissolves oxygen concn, flows in the aeration cylinder 15 to be complete mixing flow.Sewage in the aeration cylinder 15 enters packing layer 12 again from the open top of aeration cylinder 15 subsequently, forms circulation, and water inlet (untreated sewage) is diluted, and effectively resists the impact of influent concentration variation to system.At this moment, diluted sewage is bigger than air-water mixture density in the isolated aeration tube because of density, 12 declines from the bio-oxidation district from top to bottom, similar piston flow flows, and then enter the isolated aeration tube, thus forming big internal recycle, quantity of circulating water is about 6 times of flooding quantity.Effluent stream fully contacts with the filling surface microorganism when packing layer 12, and the microbial film of filling surface utilizes the every index in the nutrition and dissolved oxygen degradation of sewage in the water, as COD
Cr, sulfide, oil and phenols etc.Simultaneously, suspended substance also is trapped in the packing layer 12 by the absorption of the microbial film of filling surface by the materializing procedure of a series of complexity.After system moved for some time, part was discharged the subsequent disposal system that enters through pretreated sewage by water outlet 8.When the water outlet Pollutant levels do not reach design requirements, or water outlet is muddy, then needs carry out back flushing to packing layer.Stop into water earlier, allow backwashing water enter packing layer 12 by back flushing water-in 13, allowing outer welding system wind enter back flushing coil pipe 17 by back flushing tracheae 6 simultaneously is distributed in the backwashing water even air, carry out combined water and air backwash, the gas-water ratio of backwash process is 3～5: 1, and general backwashing time is about 20 minutes, and backwashing water and mud are discharged to outside the system by top blowdown and backwashing water relief outlet 7, if water outlet does not become clearly yet or muddy, but the proper extension backwashing time.After back flushing is finished, continue aforesaid processing operating process.
Use this invention and handle the high density oil refining sewerage, compare with traditional biological oxidation filter tank technique or activated sludge process, owing to adopted novel isolated aeration mode, big internal circulating load makes system have strong shock resistance in the reactor, the advantage that processing efficiency is high, especially be hit when causing upset operation when system, very short time can recover normal.Adding ozonation technology with traditional bio-oxidation filter tank compares, the utility model is combined in both lotus roots in the reactor and carries out, equipment and technology are compact more, reduced by a reactor, ozone decomposes the oxygen that produces and is also made full use of (decomposing the dissolved oxygen concentration that the oxygen that produces can further improve system) behind the oxidation sewage in aeration cylinder.In addition, the utility model adopts the combined water and air backwash technology, the back flushing water yield only be the simple usefulness of tradition water backwashing water consumption 40%.
Table 1 provides the utility model and traditional activated sludge process pre-treatment refinery high-concentration sewage experimental result contrast.Table 1 shows that present embodiment compares with the method for traditional activated sludge process pre-treatment refinery high-concentration sewage, at COD
Cr, oils, volatile phenol and sulfide treatment effect on be significantly improved.
Table 1 activated sludge process and the utility model are handled high-concentration sewage experimental result contrast (Pollutant levels unit: mg/l)
| Project | COD Cr | Oils | Volatile phenol | Sulfide |
| Water inlet | 1720 | 396 | 120 | 258 |
| Water outlet after the Wastewater Treated by Activated Sludge Process | 420 | 30 | 25 | 32 |
| Water outlet after present embodiment is handled | 258 | 12.2 | 6.52 | 2.10 |
Light polluted water advanced treatment and reuse.The device of the treating petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool that uses as shown in Figure 1, its structure is identical with embodiment 1.
When using this device, light polluted water (sewage of low concentration) is pumped into the packing layer 12 in bio-oxidation district by sewage import 11, and contact, filter and preliminary bio-oxidation is handled with the filling surface microorganism; After filtration and the sewage handled of preliminary bio-oxidation enter with in bottom, bio-oxidation district is communicated with and has the isolated aeration tube 15 of ozone and air admission device through stone riprap floor 2 and porous support plate 18.At this moment, air enters isolated aeration tube 15 by aeration tube 10 through aeration head 3 by air compressor, carry out oxygenation by 3 pairs of isolated aeration tube 15 liquid of aeration head, gas is evenly distributed in the liquid, and thorough mixing, gas-water ratio is 3～6: 1 (ratio of aeration rate and flooding quantity, volumetric flow rate than); Simultaneously, ozone and Air mixing gas (ozonized air) inject the isolated aeration district by ozone gas mixture inlet tube 5 through ozone mixed gas sparger 4, are evenly distributed in the fluid rapidly.By gas lift in the isolated aeration tube 15, the interior sewage of aeration cylinder is risen from bottom to top, mass transfer and ozone oxidation process between this process generation gas-liquid, ozone is along with uphill process concentration progressively reduces, decomposing the oxygen that produces has increased the system dissolves oxygen concn, flows in the aeration cylinder 15 to be complete mixing flow.Sewage in the aeration cylinder 15 enters packing layer 12 again from the open top of aeration cylinder 15 subsequently, forms circulation, and water inlet (untreated sewage) is diluted, and effectively resists the impact of influent concentration variation to system.At this moment, diluted sewage is bigger than air-water mixture density in the isolated aeration tube because of density, 12 declines from the bio-oxidation district from top to bottom, similar piston flow flows, and then enter the isolated aeration tube, thus forming big internal recycle, quantity of circulating water is about 4 times of flooding quantity.Effluent stream fully contacts with the filling surface microorganism when packing layer 12, and the microbial film of filling surface utilizes the every index in the nutrition and dissolved oxygen degradation of sewage in the water, as COD
Cr, sulfide, oil, phenol, ammonia nitrogen class etc.Simultaneously, suspended substance also is trapped in the packing layer 12 by the absorption of the microbial film of filling surface by the materializing procedure of a series of complexity.By as embodiment 1 described mode to the dilution of sewage, filter hold back, microbiological deterioration and advanced oxidation process reach the bio-oxidation processing intent to light polluted water.After system operation for some time, the water of part after biological and ozone oxidation advanced treatment is discharged by water outlet 8, directly enters rivers or handle through follow-up sterilization and disinfection to carry out reuse.Usually, the light polluted water of this system handles does not almost have mud to produce, and need not carry out backwash operation.Remove nonsystematic operation back (as some months) for a long time, or system is unstable or the water inlet Pollutant levels increase suddenly, uses water pollutant concentration and does not reach design requirements, just needs packing layer is carried out back flushing.At this moment, stop into water earlier, allow backwashing water enter packing layer 12 by back flushing water-in 13, allowing outer welding system wind enter back flushing coil pipe 17 by back flushing tracheae 6 simultaneously is distributed in the backwashing water even air, carry out combined water and air backwash, the gas-water ratio of backwash process is 3～5: 1, general backwashing time is about 10 minutes, backwashing water and mud are discharged to outside the system by top blowdown and backwashing water outlet 7, if water outlet does not become clearly yet or muddy, but the proper extension backwashing time.After back flushing is finished, continue aforesaid processing operating process.
Compare with traditional biological oxidation filter tank technique or activated sludge process, present embodiment is to the advanced treatment of light polluted water and water, owing to adopted novel isolated aeration mode, big internal circulating load makes system have strong shock resistance in the reactor, especially ought enter the light polluted water Pollutant levels of system increases suddenly, big internal circulating load makes into that the water Pollutant levels reduce rapidly, can not produce big influence to handling; Big internal circulating load improves the rate of mass transfer between the gas-liquid, thereby improves the speed of oxidising process, makes system keep high processing efficiency.Adding ozonation technology with traditional bio-oxidation filter tank compares, the utility model is combined in both lotus roots in the reactor and carries out, equipment and technology are compact more, reduced by a reactor, ozone decomposes the oxygen that produces and is also made full use of (decomposing the dissolved oxygen concentration that the oxygen that produces can further improve system) behind the oxidation sewage in aeration cylinder.In addition, application the utility model is handled light polluted water and is produced mud hardly, and system can need not to carry out back flushing.Table 2 is the light polluted water of ethene of present embodiment and traditional biology+activated carbon treatment petrochemical plant and the contrast situation of reuse experimental result.As known from Table 2, the water outlet after the utility model is handled is at COD
Cr, oils, volatile phenol, ammonia nitrogen, colourity and sulfide treatment effect on all be significantly improved.
Table 2 biology+activated carbon method and the utility model are handled light polluted water experimental result contrast table (Pollutant levels unit: mg/l)
| Project | COD Cr | Oils | Volatile phenol | Ammonia nitrogen | Sulfide | Colourity | pH |
| Water inlet | 80.8 | 1.18 | 0.212 | 2.1 | 0.024 | 55 | 6～8 |
| Water outlet after biology and the activated carbon treatment | 44.2 | 0.42 | 0.026 | 1.0 | 0.008 | 20 | 7.5 |
| Water outlet after present embodiment is handled | 30.2 | 0.38 | 0.006 | 0.1 | 0.006 | ＜5 | 7.6 |
Claims (9)
1, the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool, comprise biological filter treatment unit and ozone Oxidation Treatment device, the biological filter treatment unit comprises packing layer, the ozone Oxidation Treatment device comprises ozone access to plant and air admission device, it is characterized in that, described ozone Oxidation Treatment device is isolated with the biological filter treatment unit around being, the isolated aeration tube that its top and bottom are communicated with the biological filter treatment unit respectively, described BAF reaction unit shell upper end has petrifaction sewage import and outlet.
2, the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool according to claim 1, it is characterized in that, described air admission device comprises aeration head, aeration tube and outer air duct, aeration head is positioned at isolated aeration tube lower end, and be connected with aeration tube, aeration tube is connected with outer air duct.
3, the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool according to claim 1, it is characterized in that, described ozone access to plant comprises ozone mixed gas sparger and ozone gas mixture inlet tube, described ozone mixed gas sparger is positioned at isolated aeration tube lower end, and is connected with ozone gas mixture inlet tube.
4, the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool according to claim 1, it is characterized in that, described device also comprises back-purge system, and described back-purge system comprises back flushing tracheae, back flushing water-in, top blowdown and backwashing water outlet, bottom mud discharging mouth and back flushing coil pipe; Described back flushing water-in and top blowdown and backwashing water outlet are positioned at the upper end of BAF reaction unit shell, the bottom mud discharging mouth is positioned at BAF reaction unit shell lower end, described back flushing coil pipe is positioned at the packing layer bottom, and with the backwash gas pipe coupling, the back flushing tracheae is connected with outer air duct.
5, the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool according to claim 4 is characterized in that, blowdown of described top and backwashing water outlet are positioned at 20mm place, water outlet bottom.
6, the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool according to claim 1 is characterized in that, described BAF reaction unit shell is prepared from by nickel steel materials processing.
7, the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool according to claim 1, it is characterized in that, described biological filter treatment unit also comprises porous support plate and stone riprap layer, stacks the stone riprap layer on the described porous support plate, and described stone riprap layer is positioned at the lower end of packing layer.
8, the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool according to claim 1 is characterized in that, described device also comprises the hand hole that is used to keep in repair, and described hand hole is positioned at the lower end of BAF reaction unit shell.
9, the device for the treatment of petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool according to claim 1 is characterized in that, the filler of described packing layer adopt high-density, high-ratio surface, diameter is the biologic packing material of 6～8mm.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102311200A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Reactor for treating high concentration sewage and sewage treatment method |
| CN104386801A (en) * | 2014-12-12 | 2015-03-04 | 北京格兰特膜分离设备有限公司 | Gas-stripping circulating catalytic ozonation reaction device and advanced wastewater treatment method |
| CN106865790A (en) * | 2017-05-02 | 2017-06-20 | 广东工业大学 | A kind of sewage disposal device |
| CN111908650A (en) * | 2020-06-28 | 2020-11-10 | 中船第九设计研究院工程有限公司 | Novel marine sewage treatment device |
| CN114702198A (en) * | 2022-03-16 | 2022-07-05 | 中国环境科学研究院 | Sewage advanced treatment device and manufacturing process and treatment method thereof |
-
2005
- 2005-10-28 CN CNU2005200664969U patent/CN2839261Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102311200A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Reactor for treating high concentration sewage and sewage treatment method |
| CN104386801A (en) * | 2014-12-12 | 2015-03-04 | 北京格兰特膜分离设备有限公司 | Gas-stripping circulating catalytic ozonation reaction device and advanced wastewater treatment method |
| CN106865790A (en) * | 2017-05-02 | 2017-06-20 | 广东工业大学 | A kind of sewage disposal device |
| CN111908650A (en) * | 2020-06-28 | 2020-11-10 | 中船第九设计研究院工程有限公司 | Novel marine sewage treatment device |
| CN111908650B (en) * | 2020-06-28 | 2023-09-05 | 中船第九设计研究院工程有限公司 | Novel marine sewage treatment device |
| CN114702198A (en) * | 2022-03-16 | 2022-07-05 | 中国环境科学研究院 | Sewage advanced treatment device and manufacturing process and treatment method thereof |
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