CN103896451B - A kind of paper waste advanced treatment apparatus and method - Google Patents
A kind of paper waste advanced treatment apparatus and method Download PDFInfo
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- CN103896451B CN103896451B CN201410082172.8A CN201410082172A CN103896451B CN 103896451 B CN103896451 B CN 103896451B CN 201410082172 A CN201410082172 A CN 201410082172A CN 103896451 B CN103896451 B CN 103896451B
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Abstract
The invention discloses a kind of paper waste advanced treatment apparatus, comprising: filter pretreatment system, ozone generation system, ozone contact advanced oxidation Tower System, residual ozone degraded cell system and flow-raising aeration biological filtering pool system; Described filtration pretreatment system, ozone contact advanced oxidation Tower System, residual ozone degraded cell system, flow-raising aeration biological filtering pool system are connected successively, and described ozone generation system is connected with ozone contact advanced oxidation Tower System.The invention also discloses a kind of paper waste advanced treatment apparatus method.Adopt the present invention, filtration pretreatment system, ozone contact advanced oxidation Tower System, residual ozone degraded cell system and flow-raising aeration biological filtering pool system are combined, Papermaking Wastewater Advanced Treatment, guarantees wastewater to reach standard after treatment.
Description
Technical field
The present invention relates to water treatment field, particularly relate to a kind of paper waste advanced treatment apparatus and a kind of advanced treatment method for papermaking waste water.
Background technology
According to the requirement of " pulp and paper industry pollution discharge standard " (GB3544-2008), from 2008, new organizational system oar papermaking enterprise performs this standard " table 2 newly-built enterprise Sewage Water Emissions limit value ", as paper industry discharge of wastewater COD execution≤80mg/L, ammonia nitrogen≤8mg/.
Along with rapid development of economy; territorial development density rises; and increasingly the weakening of environmental bearing capacity; as the paper industry polluting key industry; Environmental protection requires increasingly strict; the requirement that paper industry performs " the special emission limit of table 3 water pollutant " is inexorable trend, namely as paper industry discharge of wastewater COD execution≤50mg/L, ammonia nitrogen≤5mg/.
Environmental Protection Department issue on November 27th, 2013 ring does No. 110 files " notice about strengthening papermaking and dyeing total amount reduction of discharging verification calculation work further ".Notice request, papermaking, dyeing construction item environmental management will be strengthened in various places, implement total emissions of major pollutants control overflow, using the precondition that gross contamination emission index and characteristic contamination qualified discharge manage as examined and approved environment evaluation and pollutant discharging license, newly-built, renovating and enlarging papermaking and printing and dyeing project all need clear and definite total quantity index and source.Supervise papermaking, printing and dyeing enterprise construction Sewage advanced treatment facility, implementing process technological transformation, eight contents such as stably reaching standard discharge.
" oar pulp and paper waste_water engineering legislation processed " HJ2011-2012 that in June, 2012 implements specifies, perform the employing tertiary treatment process of " the special emission limit of table 3 water pollutant " of GB3544-2008 standard, as flocculation sediment (air supporting), advanced oxidation etc.
Therefore, along with the enforcement of new standard, existing paper waste advanced treatment apparatus, method can not meet the demand of production.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of paper waste advanced treatment apparatus and advanced treatment method for papermaking waste water, can realize the advanced treatment of waste water, qualified discharge.
In order to solve the problems of the technologies described above, the invention provides a kind of paper waste advanced treatment apparatus, comprising: comprise and filter pretreatment system, ozone generation system, ozone contact advanced oxidation Tower System, residual ozone degraded cell system and flow-raising aeration biological filtering pool system; Described filtration pretreatment system, ozone contact advanced oxidation Tower System, residual ozone degraded cell system, flow-raising aeration biological filtering pool system are connected successively, and described ozone generation system is connected with ozone contact advanced oxidation Tower System; Described ozone contact advanced oxidation Tower System comprises tower body, be located at the water-distributing device at described tower body top, be located at support water distribution filter plate in the middle part of described tower body, be located at porous absorption contact packing layer above described support water distribution filter plate, be located at exposure chamber below described support water distribution filter plate, be located at many covers micro-hole aerator bottom described tower body and discharging device, be provided with the contact filler that suspends in described exposure chamber, described micro-hole aerator is connected with ozone generation system; Described residual ozone degraded cell system comprises degraded pond, the water-level control apparatus being located at described degraded pond feed-water end, the gallery type be located in described degraded pond are crossed chute and be located at the air stripping device bottom described degraded pond; Described flow-raising aeration biological filtering pool system comprises filter tank, and inside, described filter tank is provided with mixing wastewater with air layer from down to up successively, strengthens filter plate layer, sand bedding course, biologic packing material layer.
As the improvement of such scheme, described water-distributing device is casing water-distributing device; Filler in described porous absorption contact packing layer, biologic packing material layer comprises any one or combination in gac, biological ceramic particle, zeolite, hard coal, volcanics particle; Described suspension contact filler is polyhedron empty ball.
As the improvement of such scheme, described water-level control apparatus comprises cell body; Described cell body is the first cell body and the second cell body by separator lined, and described first cell body receives the waste water that ozone contact advanced oxidation Tower System exports, and the waste water gravity flow in described second cell body enters in degraded pond; Described dividing plate comprises the retaining plate be located at bottom described cell body and the portable plate being located at described cell body top, and described portable plate is for regulating elevation of water surface.
As the improvement of such scheme, inside, described filter tank is also provided with hole membranes aeration layer, and described hole membranes aeration layer is located between described sand bedding course and biologic packing material layer.
As the improvement of such scheme, described paper waste advanced treatment apparatus also comprises back-purge system, and described back-purge system is connected with flow-raising aeration biological filtering pool system; Be provided with backwash gas entrance and backwash water entrance in the mixing wastewater with air layer of described flow-raising aeration biological filtering pool system, described biologic packing material layer top is provided with effluent weir; Described back-purge system comprises back flushing Root's blower, backwash pump and back flushing discharging device, described back flushing Root's blower is connected with described backwash gas entrance, described backwash pump is connected with backwash water entrance respectively, and described back flushing discharging device is connected with described effluent weir.
As the improvement of such scheme, described paper waste advanced treatment apparatus also comprises anti-backflow device, and described anti-backflow device is located between described ozone contact advanced oxidation Tower System and ozone generation system; Described anti-backflow device is hollow cylinder, and the top of described anti-backflow device is provided with inlet pipe and escape pipe, and bottom is provided with blow-off valve, and sidewall is provided with visor; Described inlet pipe and escape pipe are equipped with vacuum breaker.
As the improvement of such scheme, described paper waste advanced treatment apparatus also comprises the gas and water separator and ozone tail gas treater that connect successively; Described gas and water separator is hollow cylinder, and the top of described gas and water separator is provided with inlet mouth, and middle part is provided with air outlet, and bottom is provided with blow-off valve; Described inlet mouth is connected with described ozone contact advanced oxidation Tower System; Silk screen dehydration layer is provided with in described air outlet.
As the improvement of such scheme, the influent waste water pipeline of described filtration pretreatment system is provided with valve, under meter, PH take into account booster water pump; Described filtration pretreatment system is any one in quartz sand filtration system, multi-medium filtering system, fibre bundle filtration system, bag type filtering system.
Correspondingly, present invention also offers a kind of advanced treatment method for papermaking waste water, comprising: waste water enters filtration pretreatment system and carries out filtration treatment; Waste water after filtration after pretreatment system process enters ozone contact advanced oxidation Tower System and carries out disaggregating treatment, waste water contacts packing layer, support water distribution filter plate, exposure chamber through water-distributing device, porous absorption, overlaps micro-hole aerator, discharging device more successively, and in tower body, the reaction times is 30 ~ 60 minutes; Waste water after the process of ozone contact advanced oxidation Tower System enters residual ozone degraded cell system and carries out degradation treatment, and the gallery type that waste water is entered in degraded pond by water monitor crosses chute, and the residence time is 60 ~ 90 minutes; Waste water after the process of residual ozone degraded cell system enters flow-raising aeration biological filtering pool system and carries out filtration treatment, waste water enters mixing wastewater with air layer successively, strengthens filter plate layer, sand bedding course, biologic packing material layer, in filter tank, the residence time is 2.5 ~ 4.0 hours, filter tank inner filtration speed is 1 ~ 4 m/h, and the gas-water ratio in mixing wastewater with air layer is 2:1 ~ 4:1; Water up to standard is discharged after the process of flow-raising aeration biological filtering pool system.
As the improvement of such scheme, the waste water after the process of residual ozone degraded cell system enters flow-raising aeration biological filtering pool system by high head gravity flow mode or pump supercharging hoisting way and carries out degradation treatment; In described high head gravity flow mode, waterhead is 0.5 ~ 1.0 meter.
Implement the present invention, there is following beneficial effect:
Filtration pretreatment system, ozone contact advanced oxidation Tower System, residual ozone degraded cell system and flow-raising aeration biological filtering pool system are combined, realizes the advanced treatment of waste water.
Retained the suspended substance in waste water by filtration pretreatment system, stabilizing water quality, avoids suspended substance and enters ozone contact advanced oxidation Tower System and consume ozone.
By ozone contact advanced oxidation Tower System, waste water is made to contact packing layer, support water distribution filter plate, exposure chamber through water-distributing device, porous absorption, overlap micro-hole aerator, discharging device more successively, the strong oxidizing property of ozone is utilized effectively the organic substance decomposing not yet can degraded to be become small organic molecule, improve the biodegradability of waste water, be stripped of the chromophoric group in waste water, given full play to the organic low operating cost of microbiological deterioration, the advantage that treatment effect is stable simultaneously.
To be degraded cell system by residual ozone, residual ozone self in waste water is decomposed gradually, avoids the interference of ozone to microorganism in flow-raising aeration biological filtering pool system.
By flow-raising aeration biological filtering pool system, waste water is made to enter mixing wastewater with air layer successively, strengthen filter plate layer, sand bedding course, hole membranes aeration layer, biologic packing material layer, utilize bio-oxidation and the feature retaining suspended substance, remove by the small organic molecule generated after ozone Oxidation Treatment.
In addition, anti-backflow device is set, can effectively prevents waste water from flowing backwards; Gas and water separator and ozone tail gas treater are set, effectively can realize the separate discharge of air water.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of paper waste advanced treatment apparatus of the present invention;
Fig. 2 is the structural representation of ozone contact advanced oxidation Tower System in a kind of paper waste advanced treatment apparatus of the present invention;
Fig. 3 is the structural representation of flow-raising aeration biological filtering pool system in a kind of paper waste advanced treatment apparatus of the present invention;
Fig. 4 is the schema of a kind of advanced treatment method for papermaking waste water of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
Shown in composition graphs 1, Fig. 2 and Fig. 3, paper waste advanced treatment apparatus comprises: filter pretreatment system 1, ozone generation system 2, ozone contact advanced oxidation Tower System 3, residual ozone degraded cell system 4 and flow-raising aeration biological filtering pool system 5.
Described filtration pretreatment system 1, ozone contact advanced oxidation Tower System 3, residual ozone degraded cell system 4, flow-raising aeration biological filtering pool system 5 are connected successively, and described ozone generation system 2 is connected with ozone contact advanced oxidation Tower System 3.Particularly, the outlet of filtering pretreatment system 1 is connected with the import at ozone contact advanced oxidation Tower System 3 top, the degrade import of cell system 4 of outlet bottom ozone contact advanced oxidation Tower System 3 and residual ozone is connected, and the outlet of residual ozone degraded cell system 4 is connected with the import bottom flow-raising aeration biological filtering pool system 5.
Wherein:
Described filtration pretreatment system 1 comprises the transportation water pump, strainer, backwash water pump and the Root's blower that connect successively.Described filtration pretreatment system 1 can dam the suspended substance in waste water get off, and makes the suspended substance≤10mg/L in waste water.Preferably, described filtration pretreatment system 1 is any one in quartz sand filtration system, multi-medium filtering system, fibre bundle filtration system, bag type filtering system, filtering accuracy≤100 μm.
Described ozone generation system 2 comprises without (micro-) oily screw air compressor, instrument air dryer, pure oxygen maker (or outsourcing liquid oxygen), ozonizer (source of oxygen) and exhaust gas processing device.
Described ozone contact advanced oxidation Tower System 3 comprises tower body 31, be located at the water-distributing device 32 at described tower body 31 top, be located at support water distribution filter plate 33 in the middle part of described tower body 31, be located at porous absorption contact packing layer 34 above described support water distribution filter plate 33, be located at exposure chamber 35 below described support water distribution filter plate 33, be located at many covers micro-hole aerator 36 bottom described tower body 31 and discharging device 37, be provided with the contact filler that suspends in described exposure chamber 35, described micro-hole aerator 36 is connected with ozone generation system 2.
It should be noted that, described ozone generation system 2 passes into ozone by micro-hole aerator 36 in ozone contact advanced oxidation Tower System 3, ozone contact advanced oxidation Tower System 3 utilizes the strong oxidizing property of ozone that the macromolecule organic in waste water is resolved into low molecule organic matter, thus reach the biodegradability improving waste water, remove the chromophoric group in waste water, running cost is low, effect stability.Meanwhile, carry out mixing wastewater with air by micro-hole aerator 36, effectively can increase the duration of contact of ozone and waste water, also can make full use of the overbottom pressure of ozone generation system 2, realize mixing wastewater with air, reduce energy consumption.
The air stripping device 44 that described residual ozone degraded cell system 4 comprises degraded pond 41, the water-level control apparatus 42 being located at described degraded pond 41 feed-water end, the gallery type be located in described degraded pond 41 are crossed chute 43 and be located at bottom described degraded pond 41.
Described flow-raising aeration biological filtering pool system 5 comprises filter tank 51, and inside, described filter tank 51 is provided with mixing wastewater with air layer 52 from down to up successively, strengthens filter plate layer 53, sand bedding course 54, biologic packing material layer 55.
It should be noted that, the mixing wastewater with air layer 52 of flow-raising aeration biological filtering pool system 5 is located at bottom, adopts the parallel upward flow of air water, can prevent the condensation of bubble, provide ozone utilization rate, reduces energy consumption.Upward flow is continuously inside, filter tank and provides positive pressure, channel or short stream can be avoided better, even if adopt high filtering velocity and high loading, still can ensure lasting stability and the validity of technique, and spatial filtering is used better, keep high loading, balanced operation, extend backwashing period, when reducing scavenging period and cleaning with water, gas consumption.Simultaneously, flow-raising aeration biological filtering pool system 5 collects bio-oxidation and suspended substance is retained in one, by being attached to the effect such as absorption, degraded, oxidation, synthesis of the microorganism in biologic packing material layer 55, give full play to the advantage that the organic low operating cost of microbiological deterioration, treatment effect are stable, compensate for the shortcoming of ozone high grade oxidation.
Fig. 4 is the schema of a kind of advanced treatment method for papermaking waste water of the present invention, comprising:
S1, waste water enters filtration pretreatment system 1 and carries out filtration treatment, removes the suspended substance of waste water, reduces suspended substance to the consumption of ozone, stabilizing water quality;
S2, the waste water after filtration after pretreatment system 1 process enters ozone contact advanced oxidation Tower System 3 and carries out disaggregating treatment;
It should be noted that, after waste water enters ozone contact advanced oxidation Tower System 3, successively through water-distributing device 32, porous absorption contact packing layer 34, support water distribution filter plate 33, exposure chamber 35, many cover micro-hole aerator 36, discharging device 37, in tower body 31, the reaction times is 30 ~ 60 minutes.Wherein, water-distributing device 32 can realize the water distribution uniformity of sectional layer; Ozone enters in the tower body 31 of ozone contact advanced oxidation Tower System 3 and waste water by many cover micro-hole aerators 36; First, waste water enters porous absorption contact packing layer 34 and carries out contact reacts with ozone, the macromolecule organic of difficult for biological degradation is degraded to low molecule organic matter, improves biodegradability; Then, enter exposure chamber 35 by support water distribution filter plate 33, under the effect of the suspension contact filler in exposure chamber 35, strengthen the contact reacts of waste water and ozone further, degradation of organic substances; Finally, waste water discharges ozone contact advanced oxidation Tower System 3 along discharging device 37.
S3, the waste water after the process of ozone contact advanced oxidation Tower System 3 enters residual ozone degraded cell system 4 and carries out degradation treatment, eliminates ozone and remains;
It should be noted that, the gallery type that waste water is entered in degraded pond 41 by water monitor 42 crosses chute 43, and the residence time is 60 ~ 90 minutes.Correspondingly, the air stripping device 44 bottom degraded pond 41 can reduce the impact of residual ozone on the microorganism in degraded pond 41 as far as possible.Preferably, described air stripping device 44 carries out stripping according to air water ratio 1:1 ~ 2:1.
S4, the waste water after residual ozone degraded cell system 4 processes enters flow-raising aeration biological filtering pool system 5 and carries out filtration treatment;
It should be noted that, after waste water enters flow-raising aeration biological filtering pool system 5, enter mixing wastewater with air layer 52 successively, strengthen filter plate layer 53, sand bedding course 54, biologic packing material layer 55, in filter tank 51, the residence time is 2.5 ~ 4 hours, filter tank 51 inner filtration speed is 1 ~ 4 m/h, and the gas-water ratio in mixing wastewater with air layer 52 is 2:1 ~ 4:1.Wherein, mixing wastewater with air layer 52 can homogenizing water quality, cuts down residual ozone concentration further; Then, waste water enters sand bedding course 54 by strengthening filter plate layer 53, strengthens filter plate layer 53 and can realize water distribution uniformity and gas distribution; Then, waste water enters biological ceramic particle layer 55, carries out aerobic biodegradation, deviates from the organism in waste water, simultaneously filter and remove suspended substances.
S5, discharges water up to standard after flow-raising aeration biological filtering pool system 5 processes.
More preferably, the waste water after residual ozone degraded cell system 4 processes enters flow-raising aeration biological filtering pool system 5 by high head gravity flow mode or pump supercharging hoisting way and carries out degradation treatment.
When the waste water after residual ozone degraded cell system 4 processes adopts high head gravity flow mode to enter flow-raising aeration biological filtering pool system 5, residual ozone degraded cell system 4 is 0.5 ~ 1.0 meter with the waterhead of flow-raising aeration biological filtering pool system 5, and the direct overflow of water reuse waterhead enters flow-raising aeration biological filtering pool system 5.
When the waste water after residual ozone degraded cell system 4 processes adopts pump supercharging hoisting way to enter flow-raising aeration biological filtering pool system 5, need booster water pump be set up, utilize booster water pump by waste water lifting to flow-raising aeration biological filtering pool system 5.
Therefore, the suspended substance in waste water can be retained down by filtering pretreatment system 1, be conducive to stabilizing water quality, avoiding suspended substance and enter ozone contact advanced oxidation Tower System 3 and consume ozone; By ozone contact advanced oxidation Tower System 3, the strong oxidizing property of ozone is utilized effectively the organic substance decomposing not yet can degraded to be become small organic molecule, improve the biodegradability of waste water, be stripped of the chromophoric group in waste water, given full play to the organic low operating cost of microbiological deterioration, the advantage that treatment effect is stable simultaneously; By the process of residual ozone degraded cell system 4, residual ozone self in waste water is decomposed gradually, avoids the interference of ozone to microorganism in flow-raising aeration biological filtering pool system 5; Then, enter flow-raising aeration biological filtering pool system 5 by waste water outflow (or pump is carried), remove by the small organic molecule generated after ozone Oxidation Treatment.Achieve the advanced treatment of waste water, Treated sewage reusing, discharge water extraction mark.
As shown in Figure 1, the influent waste water pipeline of described filtration pretreatment system 1 is provided with valve 11, under meter 12, PH take into account booster water pump 13.
During work, waste water pumps into through booster water pump 13 and filters pretreatment system 1, and is entered the import at ozone contact advanced oxidation system 3 top by overbottom pressure.
As shown in Figure 2, the water-distributing device 32 in described ozone contact advanced oxidation Tower System 3 is casing water-distributing device.
More preferably, the filler in described porous absorption contact packing layer 34 comprises any one or combination in gac, biological ceramic particle, zeolite, hard coal, volcanics particle.Preferably, the thickness of described porous absorption contact packing layer 34 is 0.8 ~ 20m, and described packing material size is 4 ~ 8 Φ.
More preferably, the suspension contact filler in described exposure chamber 35 is polyhedron empty ball, and resistance is little, fully can solve air water and exchange.Preferably, the described particle diameter suspending contact filler is 50 Φ, and filling ratio is 15-30%.
Preferably, the diameter≤3600mm of described tower body 31, be highly 8.5m, material is SS304 or steel lining epoxy micaceous iron, and coats chlorosulfonated polyethylene paint, and erosion resistance is strong.
Preferably, the material of described support water distribution filter plate 33 is SS304, and described support water distribution filter plate 33 is provided with filter cap, and described filter cap specification is 0.5m
3/ h or 1.0m
3/ h, material is ABS resin or SS304, selects the quantity of filter cap, realize water distribution uniformity according to 1.5 ~ 2.0 times of the process water yield.
Preferably, described micro-hole aerator 36 is titanium plate or corundum material, and the material of the connecting tube between each micro-hole aerator 36 is SS304, and intensity is high, corrosion resistance is strong.
It should be noted that, waste water enters ozone contact advanced oxidation Tower System 3, ozone contact is adopted to carry out advanced oxidation, the porous absorption contact packing layer 34(filled in tower body 31 is as gac, biological ceramic particle, zeolite, hard coal, volcanics particle) can dissolved organic matter promptly in planar water, simultaneously also can the oxidizing substance such as adsorb ozone, thus substantially increase the oxidation efficiency of ozone, reduce cost for wastewater treatment.Ozone superpower oxidation capacity preoxidation effect, the organism in preliminary oxidation water of decomposition and other reducing substances, ozone oxidation can make to be difficult to biodegradable organism chain rupture, open loop in water simultaneously, changes into simple aliphatic hydrocarbon, changes its biochemical characteristic.The oxidation of some harmful organic substance can become except harmless object except self by ozone, objectively can also increase micromolecular organism, the adsorption function of filler is better played.
As shown in Figure 1 and Figure 2 above, the water-level control apparatus 42 of described residual ozone degraded cell system 4 comprises cell body.Described cell body is divided into the first cell body and the second cell body by dividing plate 45, and described first cell body receives the waste water that ozone contact advanced oxidation Tower System 3 exports, and the waste water gravity flow in described second cell body enters in degraded pond 41.Described dividing plate 45 comprises the retaining plate be located at bottom described cell body and the portable plate being located at described cell body top, and described portable plate is for regulating elevation of water surface.
As shown in Figure 3, the inside, filter tank 51 of described flow-raising aeration biological filtering pool system 5 is also provided with hole membranes aeration layer 56, and described hole membranes aeration layer 56 is located between described sand bedding course 54 and biologic packing material layer 55.Aeration effect can be effectively strengthened by hole membranes aeration layer 56.
More preferably, the filler in described biologic packing material layer 55 comprises any one or combination in gac, biological ceramic particle, zeolite, hard coal, volcanics particle.The degraded of aerobe effectively can be carried out, simultaneously filter and remove suspended substances by biologic packing material layer 55.Preferably, the thickness of described biologic packing material layer 55 is 2.0 ~ 3.0m, and described packing material size is 2 ~ 6 Φ.
Preferably, described sand bedding course 54 is quartz sand thickness, effectively can remove suspended substance, high adsorption capacity in waste water, and the particle diameter of quartz is 1 ~ 2 Φ or 2 ~ 4 Φ, and the thickness of described sand bedding course is 300 ~ 400mm.
Preferably, the filter plate in described reinforcement filter plate layer 53 is steel plate or strengthens cement plate, and described filter plate is provided with long handle filter cap, and the material of described long handle filter cap is ABS resin or SS304.Water distribution uniformity and gas distribution is realized by long handle filter cap.
As shown in Figure 3, described paper waste advanced treatment apparatus also comprises back-purge system 6, and described back-purge system 6 is connected with flow-raising aeration biological filtering pool system 5.
Be provided with backwash gas entrance and backwash water entrance in the mixing wastewater with air layer 52 of described flow-raising aeration biological filtering pool system 5, described biologic packing material layer 55 top is provided with effluent weir.
Described back-purge system 6 comprises back flushing Root's blower, backwash pump and back flushing discharging device, described back flushing Root's blower is connected with described backwash gas entrance, described backwash pump is connected with backwash water entrance respectively, and described back flushing discharging device is connected with described effluent weir.
Described effluent weir comprises water water outlet 57 up to standard and the back flushing mouth of a river 58.Wherein, mark water water outlet 57 is for the discharge of water up to standard or Treated sewage reusing, and the back flushing mouth of a river 58 enters mixing wastewater with air layer 52 again for backwashing water.
As shown in Figures 1 and 2, described paper waste advanced treatment apparatus also comprises anti-backflow device 7, and described anti-backflow device 7 is located between described ozone contact advanced oxidation Tower System 3 and ozone generation system 2.
Described anti-backflow device 7 is hollow cylinder, and the top of described anti-backflow device 7 is provided with inlet pipe and escape pipe, and bottom is provided with blow-off valve, and sidewall is provided with visor.Preferably, the material of described hollow cylinder is SS304, and volumetric quantity is 50L, and described sidewall is provided with upper, middle and lower three visors along vertically distribution.
Described inlet pipe and escape pipe are equipped with vacuum breaker 71.Preferably, the material of described vacuum breaker 71 is SS304.
During work, the ozone that ozone generation system 2 produces enters anti-backflow device 7 along inlet pipe, and enter ozone contact advanced oxidation Tower System 3 by escape pipe discharge anti-backflow device 7, if when waste water occurs to flow backwards, can be stored in the hollow cylinder of anti-backflow device 7, and observe water situation, when needing, by blow-off valve waste discharge by visor.
As shown in Figure 1, described paper waste advanced treatment apparatus also comprises the gas and water separator 8 and ozone tail gas treater 9 that connect successively.
Described gas and water separator 8 is hollow cylinder, and the top of described gas and water separator 8 is provided with inlet mouth, and middle part is provided with air outlet, and bottom is provided with blow-off valve.
Described inlet mouth is connected with the offgas outlet 38 on described ozone contact advanced oxidation Tower System 3;
Silk screen dehydration layer is provided with in described air outlet.
Preferably, the material of described gas and water separator 8 and silk screen dehydration layer is SS304.
During work, tail gas is expelled to gas and water separator 8 by the offgas outlet 38 of ozone contact advanced oxidation Tower System 3, after gas and water separator 8 is separated, the gas be separated transfers to ozone tail gas treater 9 and discharges through air outlet, be separated waste water and blow-off valve can be utilized to discharge.
As from the foregoing, filtration pretreatment system 1, ozone contact advanced oxidation Tower System 3, residual ozone degraded cell system 4 and flow-raising aeration biological filtering pool system 5 are combined.Retained the suspended substance in waste water by filtration pretreatment system 1, stabilizing water quality, avoids suspended substance and enters ozone contact advanced oxidation Tower System 3 and consume ozone; By ozone contact advanced oxidation Tower System 3, make waste water successively through water-distributing device 32, porous absorption contact packing layer 34, support water distribution filter plate 33, exposure chamber 35, many cover micro-hole aerator 36, discharging device 37, the strong oxidizing property of ozone is utilized effectively the organic substance decomposing not yet can degraded to be become small organic molecule, improve the biodegradability of waste water, be stripped of the chromophoric group in waste water, given full play to the organic low operating cost of microbiological deterioration, the advantage that treatment effect is stable simultaneously; By residual ozone degraded cell system 4, residual ozone self in waste water is decomposed gradually, avoids the interference of ozone to microorganism in flow-raising aeration biological filtering pool system 5; By flow-raising aeration biological filtering pool system 5, waste water enters mixing wastewater with air layer 52 successively, strengthens filter plate layer 53, sand bedding course 54, hole membranes aeration layer 56, biologic packing material layer 55, utilize bio-oxidation and the feature retaining suspended substance, remove by the small organic molecule generated after ozone Oxidation Treatment.The waste water achieve the advanced treatment of waste water, guaranteeing after treatment reaches the requirement of " pulp and paper industry pollution discharge standard " (GB3544-2008) " the special emission limit of table 3 water pollutant ".
In addition, the present invention can carry out advanced treatment to paper waste, also can carry out advanced treatment to the waste water of other industry, or combine with other technique, as the technique such as ultrafiltration, reverse osmosis, realizes the object of Treated sewage reusing.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (8)
1. a paper waste advanced treatment apparatus, it is characterized in that, described paper waste advanced treatment apparatus comprises filtration pretreatment system, ozone generation system, ozone contact advanced oxidation Tower System, residual ozone degraded cell system and flow-raising aeration biological filtering pool system;
Described filtration pretreatment system, ozone contact advanced oxidation Tower System, residual ozone degraded cell system, flow-raising aeration biological filtering pool system are connected successively, and described ozone generation system is connected with ozone contact advanced oxidation Tower System;
Described ozone contact advanced oxidation Tower System comprises tower body, be located at the water-distributing device at described tower body top, be located at support water distribution filter plate in the middle part of described tower body, be located at porous absorption contact packing layer above described support water distribution filter plate, be located at exposure chamber below described support water distribution filter plate, be located at many covers micro-hole aerator bottom described tower body and discharging device, be provided with the contact filler that suspends in described exposure chamber, described micro-hole aerator is connected with ozone generation system;
Described residual ozone degraded cell system comprises degraded pond, the water-level control apparatus being located at described degraded pond feed-water end, the gallery type be located in described degraded pond are crossed chute and be located at the air stripping device bottom described degraded pond; Described water-level control apparatus comprises cell body; Described cell body is the first cell body and the second cell body by separator lined, and described first cell body receives the waste water that ozone contact advanced oxidation Tower System exports, and the waste water gravity flow in described second cell body enters in degraded pond; Described dividing plate comprises the retaining plate be located at bottom described cell body and the portable plate being located at described cell body top, and described portable plate is for regulating elevation of water surface;
Described flow-raising aeration biological filtering pool system comprises filter tank, and inside, described filter tank is provided with mixing wastewater with air layer from down to up successively, strengthens filter plate layer, sand bedding course, biologic packing material layer; Inside, described filter tank is also provided with hole membranes aeration layer, and described hole membranes aeration layer is located between described sand bedding course and biologic packing material layer.
2. paper waste advanced treatment apparatus as claimed in claim 1, is characterized in that,
Described water-distributing device is casing water-distributing device;
Filler in described porous absorption contact packing layer, biologic packing material layer comprises any one or combination in gac, biological ceramic particle, zeolite, hard coal, volcanics particle;
Described suspension contact filler is polyhedron empty ball.
3. paper waste advanced treatment apparatus as claimed in claim 1, is characterized in that,
Described paper waste advanced treatment apparatus also comprises back-purge system, and described back-purge system is connected with flow-raising aeration biological filtering pool system;
Be provided with backwash gas entrance and backwash water entrance in the mixing wastewater with air layer of described flow-raising aeration biological filtering pool system, described biologic packing material layer top is provided with effluent weir;
Described back-purge system comprises back flushing Root's blower, backwash pump and back flushing discharging device, described back flushing Root's blower is connected with described backwash gas entrance, described backwash pump is connected with backwash water entrance, and described back flushing discharging device is connected with described effluent weir.
4. paper waste advanced treatment apparatus as claimed in claim 1, is characterized in that,
Described paper waste advanced treatment apparatus also comprises anti-backflow device, and described anti-backflow device is located between described ozone contact advanced oxidation Tower System and ozone generation system;
Described anti-backflow device is hollow cylinder, and the top of described anti-backflow device is provided with inlet pipe and escape pipe, and bottom is provided with blow-off valve, and sidewall is provided with visor;
Described inlet pipe and escape pipe are equipped with vacuum breaker.
5. paper waste advanced treatment apparatus as claimed in claim 1, is characterized in that,
Described paper waste advanced treatment apparatus also comprises the gas and water separator and ozone tail gas treater that connect successively;
Described gas and water separator is hollow cylinder, and the top of described gas and water separator is provided with inlet mouth, and middle part is provided with air outlet, and bottom is provided with blow-off valve;
Described inlet mouth is connected with described ozone contact advanced oxidation Tower System;
Silk screen dehydration layer is provided with in described air outlet.
6. paper waste advanced treatment apparatus as claimed in claim 1, is characterized in that, the influent waste water pipeline of described filtration pretreatment system is provided with valve, under meter, PH take into account booster water pump;
Described filtration pretreatment system is any one in quartz sand filtration system, multi-medium filtering system, fibre bundle filtration system, bag type filtering system.
7. an advanced treatment method for papermaking waste water, is characterized in that, comprising:
Waste water enters filtration pretreatment system and carries out filtration treatment;
Waste water after filtration after pretreatment system process enters ozone contact advanced oxidation Tower System and carries out disaggregating treatment, waste water contacts packing layer, support water distribution filter plate, exposure chamber through water-distributing device, porous absorption, overlaps micro-hole aerator, discharging device more successively, and in tower body, the reaction times is 30 ~ 60 minutes;
Waste water after the process of ozone contact advanced oxidation Tower System enters residual ozone degraded cell system and carries out degradation treatment, and the gallery type that waste water is entered in degraded pond by water monitor crosses chute, and the residence time is 60 ~ 90 minutes;
Waste water after the process of residual ozone degraded cell system enters flow-raising aeration biological filtering pool system and carries out filtration treatment, waste water enters mixing wastewater with air layer successively, strengthens filter plate layer, sand bedding course, biologic packing material layer, in filter tank, the residence time is 2.5 ~ 4.0 hours, filter tank inner filtration speed is 1 ~ 4 m/h, and the gas-water ratio in mixing wastewater with air layer is 2:1 ~ 4:1;
Water up to standard is discharged after the process of flow-raising aeration biological filtering pool system.
8. advanced treatment method for papermaking waste water as claimed in claim 7, is characterized in that,
Waste water after the process of residual ozone degraded cell system enters flow-raising aeration biological filtering pool system by high head gravity flow mode or pump supercharging hoisting way and carries out degradation treatment;
In described high head gravity flow mode, waterhead is 0.5 ~ 1.0 meter.
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| CN104150683A (en) * | 2014-07-10 | 2014-11-19 | 唐国民 | Advanced treatment device for traditional Chinese medicine wastewater and treatment method thereof |
| CN104058499B (en) * | 2014-07-15 | 2016-01-20 | 许建民 | A kind of BAF and technique |
| CN104370359B (en) * | 2014-11-13 | 2016-04-27 | 南京科技职业学院 | A kind of method of O3 contacted oxidation pond and advanced treatment refinery water thereof |
| CN106629970A (en) * | 2016-11-22 | 2017-05-10 | 河南师范大学 | Recycling treatment method of papermaking white water |
| CN107215946B (en) * | 2017-05-23 | 2020-03-20 | 江苏和顺环保有限公司 | Miniature water treatment ozone reaction unit |
| CN109354181A (en) * | 2018-11-29 | 2019-02-19 | 华南理工大学 | It is thoroughly mixed the biological reinforced hydrolytic tank of formula, carbonless paper coating waste water treatment system and method |
| CN111573962B (en) * | 2020-03-24 | 2021-04-30 | 南京延长反应技术研究院有限公司 | External micro-interface papermaking sewage treatment system and treatment method |
| CN114873679B (en) * | 2021-02-05 | 2023-10-27 | 陕西青朗万城环保科技有限公司 | Industrial waste stripping treatment method and control system thereof |
| CN116102216B (en) * | 2023-03-09 | 2024-08-16 | 南京理工大学泰州科技学院 | Integrated advanced oxidation-aeration biological filter and advanced wastewater treatment method |
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