CN103896451A - Deep papermaking wastewater treatment device and method - Google Patents
Deep papermaking wastewater treatment device and method Download PDFInfo
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- CN103896451A CN103896451A CN201410082172.8A CN201410082172A CN103896451A CN 103896451 A CN103896451 A CN 103896451A CN 201410082172 A CN201410082172 A CN 201410082172A CN 103896451 A CN103896451 A CN 103896451A
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Abstract
The invention discloses a deep papermaking wastewater treatment device. The device comprises a filtering pretreatment system, an ozone generation system, an ozone contact advanced oxidation tower system, a residual ozone degradation pond system and an upflow biologic aerated filter system, wherein the filtering pretreatment system, the ozone contact advanced oxidation tower system, the residual ozone degradation pond system and the upflow biologic aerated filter system are connected in sequence, and the ozone generation system is connected with the ozone contact advanced oxidation tower system. The invention further discloses a deep papermaking wastewater treatment method. According to the device, the filtering pretreatment system, the ozone contact advanced oxidation tower system, the residual ozone degradation pond system and the upflow biologic aerated filter system are combined, so that papermaking wastewater can be deeply treated, and the treated wastewater meets the standards.
Description
Technical field
The present invention relates to water treatment field, relate in particular to a kind of paper waste advanced treatment apparatus and a kind of advanced treatment method for papermaking waste water.
Background technology
According to " pulp and paper industry pollution discharge standard " requirement (GB3544-2008), from 2008, new organizational system oar papermaking enterprise is carried out this standard " the newly-built enterprise of table 2 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 that pollutes key industry; country is increasingly strict to environmental protection requirement; the requirement that paper industry is carried out " the special emission limit of table 3 water pollutant " is inexorable trend, as paper industry discharge of wastewater COD execution≤50mg/L, ammonia nitrogen≤5mg/.
Environmental Protection Department issue on November 27th, 2013 ring is done No. 110 files " reducing discharging the notice of verifying calculation work about further reinforcement papermaking and dyeing total amount ".Notice request, papermaking, the environmental management of dyeing construction project will be strengthened in various places, implement total emissions of major pollutants control requirement, using gross contamination emission index and feature pollutant discharge in compliance with the standard as examined and approved environment evaluation with the precondition of pollutant discharging license management, 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 to build waste water 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 regulation of implementing in June, 2012, carry out 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, a kind of paper waste advanced treatment apparatus and advanced treatment method for papermaking waste water are provided, and can realize advanced treatment, the qualified discharge of waste water.
In order to solve the problems of the technologies described above, the invention provides a kind of paper waste advanced treatment apparatus, comprising: comprise pretreatment system, ozone generation system, ozone contact advanced oxidation Tower System, residual ozone degraded cell system and the flow-raising aeration biological filtering pool system of filtering; 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 described tower body middle part support water distribution filter plate, be located at described support water distribution filter plate top porous absorption contact packing layer, be located at described support water distribution filter plate below exposure chamber, be located at many covers micro-hole aerator and the discharging device of described tower body bottom, in described exposure chamber, be provided with the contact filler that suspends, described micro-hole aerator is connected with ozone generation system; Described residual ozone degraded cell system comprises degraded pond, be located at the water-level control apparatus of described degraded pond feed-water end, be located at the air stripping device that gallery type in described degraded pond is crossed chute and is located at bottom, described degraded pond; Described flow-raising aeration biological filtering pool system comprises filter tank, and inside, described filter tank is provided with successively from down to up mixing wastewater with air layer, 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 the 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 the first cell body receives the waste water of ozone contact advanced oxidation Tower System output, and the waste water gravity flow in described the second cell body enters in degraded pond; Described dividing plate comprises the retaining plate of being located at described cell body bottom and the portable plate of being located at described cell body top, and described portable plate is used 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; In the mixing wastewater with air layer of described flow-raising aeration biological filtering pool system, be provided with backwash gas entrance and backwash water entrance, 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; On described inlet pipe and escape pipe, be equipped with vacuum breaker.
As the improvement of such scheme, described paper waste advanced treatment apparatus also comprises the gas and water separator and the 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; In described air outlet, be provided with silk screen dehydration layer.
As the improvement of such scheme, the influent waste water pipeline of described filtration pretreatment system is provided with valve, under meter, PH and takes 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, the present invention also provides a kind of advanced treatment method for papermaking waste water, comprising: waste water enters filtration pretreatment system and carries out filtration treatment; Pretreatment system waste water after treatment enters ozone contact advanced oxidation Tower System and carries out disaggregating treatment after filtration, waste water contacts packing layer, support water distribution filter plate, exposure chamber, overlaps micro-hole aerator, discharging device more through water-distributing device, porous absorption successively, and in tower body, the reaction times is 30 ~ 60 minutes; Enter residual ozone degraded cell system through ozone contact advanced oxidation Tower System waste water after treatment and carry out degradation treatment, the gallery type that waste water enters in degraded pond by water monitor is crossed chute, and the residence time is 60 ~ 90 minutes; Enter flow-raising aeration biological filtering pool system through residual ozone degraded cell system waste water after treatment and carry out filtration treatment, waste water enters successively mixing wastewater with air layer, 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; After processing, flow-raising aeration biological filtering pool system discharges water up to standard.
As the improvement of such scheme, enter flow-raising aeration biological filtering pool system by a high position from stream mode or pump supercharging hoisting way through residual ozone degraded cell system waste water after treatment and carry out degradation treatment; A described high position is in stream mode, and 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, realize the advanced treatment of waste water.
Hold back the suspended substance in waste water by filtering pretreatment system, stabilizing water quality, has avoided suspended substance to enter ozone contact advanced oxidation Tower System and has consumed ozone.
By ozone contact advanced oxidation Tower System, make waste water contact packing layer, support water distribution filter plate, exposure chamber, overlap micro-hole aerator, discharging device more through water-distributing device, porous absorption successively, utilize the strong oxidizing property of ozone effectively the organic substance decomposing that not yet can degrade to be become to small organic molecule, improve the biodegradability of waste water, remove 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 residual ozone cell system of degrading, residual ozone self in waste water is decomposed gradually, avoid the interference of ozone to microorganism in flow-raising aeration biological filtering pool system.
By flow-raising aeration biological filtering pool system, make waste water enter successively mixing wastewater with air layer, strengthen filter plate layer, sand bedding course, hole membranes aeration layer, biologic packing material layer, utilize bio-oxidation and the feature of holding back suspended substance, the small organic molecule being generated after ozone Oxidation Treatment is removed.
In addition, anti-backflow device is set, can effectively prevents that waste water from flowing backwards; Gas and water separator and ozone tail gas treater are set, can effectively 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 clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
Shown in Fig. 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 tops, the outlet of ozone contact advanced oxidation Tower System 3 bottoms is connected with the import of residual ozone degraded cell system 4, and the outlet of residual ozone degraded cell system 4 is connected with the import of flow-raising aeration biological filtering pool system 5 bottoms.
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 μ m.
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 tops, be located at described tower body 31 middle parts support water distribution filter plate 33, be located at described support water distribution filter plate 33 tops porous absorption contact packing layer 34, be located at described support water distribution filter plate 33 belows exposure chamber 35, be located at many covers micro-hole aerator 36 and the discharging device 37 of described tower body 31 bottoms, in described exposure chamber 35, be provided with the contact filler that suspends, 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, thereby reach the biodegradability that improves 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, can effectively 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.
Described residual ozone degraded cell system 4 comprises degraded pond 41, be located at the water-level control apparatus 42 of described degraded pond 41 feed-water ends, be located at the air stripping device 44 that gallery type in described degraded pond 41 is crossed chute 43 and is located at 41 bottoms, described degraded pond.
Described flow-raising aeration biological filtering pool system 5 comprises filter tank 51, and 51 inside, described filter tank are provided with successively from down to up mixing wastewater with air layer 52, strengthen 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 condensing of bubble, and ozone utilization rate is provided, and reduces energy consumption.Upward flow is continuously inside, filter tank positive pressure is provided, can avoid better channel or short stream, even if adopt high filtering velocity and high loading, still can guarantee lasting stability and the validity of technique, and spatial filtering is used better, the operation that keeps high loading, equilibrium, extends backwashing period, water, gas consumption when reducing scavenging period and cleaning.Simultaneously, flow-raising aeration biological filtering pool system 5 collects bio-oxidation and suspended substance is retained in one, by being attached to the absorption, degraded, oxidation of the microorganism in biologic packing material layer 55, the effect such as synthetic, give full play to the organic low operating cost of microbiological deterioration, the stable advantage for the treatment of effect, made up 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 the consumption of suspended substance to ozone, stabilizing water quality;
S2, pretreatment system 1 waste water after treatment enters ozone contact advanced oxidation Tower System 3 and carries out disaggregating treatment after filtration;
It should be noted that, waste water enters after ozone contact advanced oxidation Tower System 3, contact packing layer 34, support water distribution filter plate 33, exposure chamber 35, overlap micro-hole aerator 36, discharging device 37 more through water-distributing device 32, porous absorption successively, the interior reaction times of tower body 31 is 30 ~ 60 minutes.Wherein, water-distributing device 32 can be realized the water distribution uniformity of sectional layer; Ozone enters by many covers micro-hole aerator 36 in the tower body 31 of ozone contact advanced oxidation Tower System 3 and contacts with waste water; First, waste water enters porous absorption contact packing layer 34 and carries out contact reacts with ozone, and 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, further strengthen the contact reacts of waste water and ozone, degradation of organic substances; Finally, waste water is discharged ozone contact advanced oxidation Tower System 3 along discharging device 37.
S3, enters residual ozone degraded cell system 4 through ozone contact advanced oxidation Tower System 3 waste water after treatment and carries out degradation treatment, eliminates ozone residual;
It should be noted that, the gallery type that waste water enters in degraded pond 41 by water monitor 42 is crossed chute 43, and the residence time is 60 ~ 90 minutes.Correspondingly, the air stripping device 44 of degraded 41 bottoms, pond 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, enters flow-raising aeration biological filtering pool system 5 through residual ozone degraded cell system 4 waste water after treatment and carries out filtration treatment;
It should be noted that, waste water enters after flow-raising aeration biological filtering pool system 5, enter successively mixing wastewater with air layer 52, strengthen filter plate layer 53, sand bedding course 54, biologic packing material layer 55, the interior residence time of filter tank 51 is 2.5 ~ 4 hours, filter tank 51 inner filtration speed are 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, further cuts down residual ozone concentration; 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 is processed.
More preferably, enter flow-raising aeration biological filtering pool system 5 by a high position from stream mode or pump supercharging hoisting way through residual ozone degraded cell system 4 waste water after treatment and carry out degradation treatment.
When residual ozone degraded cell system 4 waste water after treatment adopts high-order in the time that stream mode enters 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.
In the time that residual ozone degraded cell system 4 waste water after treatment adopts pump supercharging hoisting way to enter flow-raising aeration biological filtering pool system 5, need set up booster water pump, 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, avoid suspended substance to enter ozone contact advanced oxidation Tower System 3 and consumption ozone; By ozone contact advanced oxidation Tower System 3, utilize the strong oxidizing property of ozone effectively the organic substance decomposing that not yet can degrade to be become to small organic molecule, improve the biodegradability of waste water, remove 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 degrade processing of cell system 4 of residual ozone, residual ozone self in waste water is decomposed gradually, avoid the interference of ozone to flow-raising aeration biological filtering pool system 5 interior microorganisms; Then, enter flow-raising aeration biological filtering pool system 5 by waste water outflow (or pump is carried), the small organic molecule being generated after ozone Oxidation Treatment is removed.The advanced treatment of waste water, middle water reuse, discharge water extraction mark are realized.
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 and takes into account booster water pump 13.
When work, waste water pumps into and filters pretreatment system 1 through booster water pump 13, and the import that enters ozone contact advanced oxidation system 3 tops 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 the 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, can fully solve air water exchange.Preferably, the particle diameter of described suspension contact filler is 50 Φ, and filling ratio is 15-30%.
Preferably, the diameter≤3600mm of described tower body 31, is highly 8.5m, and 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 0.5 m
3/ h or 1.0m
3/ h, material is ABS resin or SS304, according to the quantity of processing 1.5 ~ 2.0 times of the water yield and select filter cap, realizes water distribution uniformity.
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, adopt ozone contact to carry out advanced oxidation, at the porous absorption contact packing layer 34(of tower body 31 interior fillings as gac, biological ceramic particle, zeolite, hard coal, volcanics particle) dissolved organic matter in planar water promptly, also can adsorb the oxidizing substances such as ozone simultaneously, thereby the oxidation efficiency that has greatly improved ozone, has reduced cost for wastewater treatment.The superpower oxidation capacity preoxidation of ozone effect, organism and other reducing substances in preliminary oxygenolysis water, 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.Ozone, except self can become some harmful organic substance oxidation harmless object, objectively can also increase micromolecular organism, and the adsorption function of filler is better brought into play.
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 the first cell body receives the waste water that ozone contact advanced oxidation Tower System 3 is exported, and the waste water gravity flow in described the second cell body enters in degraded pond 41.Described dividing plate 45 comprises the retaining plate of being located at described cell body bottom and the portable plate of being located at described cell body top, and described portable plate is used for regulating elevation of water surface.
As shown in Figure 3,51 inside, filter tank of described flow-raising aeration biological filtering pool system 5 are 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.Can effectively strengthen aeration effect by hole membranes aeration layer 56.
More preferably, the filler in described biologic packing material layer 55 comprises any one or the combination in gac, biological ceramic particle, zeolite, hard coal, volcanics particle.Can effectively carry out the degraded of aerobe by biologic packing material layer 55, simultaneously filter and remove suspended substances.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, can effectively 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 reinforcement 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.Can realize water distribution uniformity and gas distribution 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.
In the mixing wastewater with air layer 52 of described flow-raising aeration biological filtering pool system 5, be provided with backwash gas entrance and backwash water entrance, described biologic packing material layer 55 top are 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 discharge or the water reuse of water up to standard, 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 three visors of upper, middle and lower that distribute along vertically.
On described inlet pipe and escape pipe, be equipped with vacuum breaker 71.Preferably, the material of described vacuum breaker 71 is SS304.
When 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 can observe water situation by visor, while needs, by blow-off valve waste discharge.
As shown in Figure 1, described paper waste advanced treatment apparatus also comprises the gas and water separator 8 and the 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 tail gas outlet 38 on described ozone contact advanced oxidation Tower System 3;
In described air outlet, be provided with silk screen dehydration layer.
Preferably, the material of described gas and water separator 8 and silk screen dehydration layer is SS304.
When work, tail gas is expelled to gas and water separator 8 by the tail gas outlet 38 of ozone contact advanced oxidation Tower System 3, after gas and water separator 8 separates, the gas being separated transfers to ozone tail gas treater 9 and discharges through air outlet, be separated waste water and can utilize blow-off valve 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.Hold back the suspended substance in waste water by filtering pretreatment system 1, stabilizing water quality, has avoided suspended substance to enter ozone contact advanced oxidation Tower System 3 and consumption ozone; By ozone contact advanced oxidation Tower System 3, make waste water contact packing layer 34, support water distribution filter plate 33, exposure chamber 35, overlap micro-hole aerator 36, discharging device 37 more through water-distributing device 32, porous absorption successively, utilize the strong oxidizing property of ozone effectively the organic substance decomposing that not yet can degrade to be become to small organic molecule, improve the biodegradability of waste water, remove 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 residual ozone cell system 4 of degrading, residual ozone self in waste water is decomposed gradually, avoid the interference of ozone to flow-raising aeration biological filtering pool system 5 interior microorganisms; By flow-raising aeration biological filtering pool system 5, waste water enters successively mixing wastewater with air layer 52, 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 of holding back suspended substance, the small organic molecule being generated after ozone Oxidation Treatment is removed.Realized waste water advanced treatment, guarantee that waste water after treatment reaches " pulp and paper industry pollution discharge standard " (GB3544-2008) requirement of " 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 combines with other technique, as the technique such as ultrafiltration, reverse osmosis, and the object of water reuse in realization.
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 (10)
1. a paper waste advanced treatment apparatus, it is characterized in that, described paper waste advanced treatment apparatus comprises pretreatment system, ozone generation system, ozone contact advanced oxidation Tower System, residual ozone degraded cell system and the flow-raising aeration biological filtering pool system of filtering;
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 described tower body middle part support water distribution filter plate, be located at described support water distribution filter plate top porous absorption contact packing layer, be located at described support water distribution filter plate below exposure chamber, be located at many covers micro-hole aerator and the discharging device of described tower body bottom, in described exposure chamber, be provided with the contact filler that suspends, described micro-hole aerator is connected with ozone generation system;
Described residual ozone degraded cell system comprises degraded pond, be located at the water-level control apparatus of described degraded pond feed-water end, be located at the air stripping device that gallery type in described degraded pond is crossed chute and is located at bottom, described degraded pond;
Described flow-raising aeration biological filtering pool system comprises filter tank, and inside, described filter tank is provided with successively from down to up mixing wastewater with air layer, strengthens filter plate layer, sand bedding course, 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 the 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 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 the first cell body receives the waste water of ozone contact advanced oxidation Tower System output, and the waste water gravity flow in described the second cell body enters in degraded pond;
Described dividing plate comprises the retaining plate of being located at described cell body bottom and the portable plate of being located at described cell body top, and described portable plate is used for regulating elevation of water surface.
4. paper waste advanced treatment apparatus as claimed in claim 1, is characterized in that, 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.
5. 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;
In the mixing wastewater with air layer of described flow-raising aeration biological filtering pool system, be provided with backwash gas entrance and backwash water entrance, 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.
6. 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;
On described inlet pipe and escape pipe, be equipped with vacuum breaker.
7. 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 the 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;
In described air outlet, be provided with silk screen dehydration layer.
8. 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 and takes 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.
9. an advanced treatment method for papermaking waste water, is characterized in that, comprising:
Waste water enters filtration pretreatment system and carries out filtration treatment;
Pretreatment system waste water after treatment enters ozone contact advanced oxidation Tower System and carries out disaggregating treatment after filtration, waste water contacts packing layer, support water distribution filter plate, exposure chamber, overlaps micro-hole aerator, discharging device more through water-distributing device, porous absorption successively, and in tower body, the reaction times is 30 ~ 60 minutes;
Enter residual ozone degraded cell system through ozone contact advanced oxidation Tower System waste water after treatment and carry out degradation treatment, the gallery type that waste water enters in degraded pond by water monitor is crossed chute, and the residence time is 60 ~ 90 minutes;
Enter flow-raising aeration biological filtering pool system through residual ozone degraded cell system waste water after treatment and carry out filtration treatment, waste water enters successively mixing wastewater with air layer, 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;
After processing, flow-raising aeration biological filtering pool system discharges water up to standard.
10. advanced treatment method for papermaking waste water as claimed in claim 9, is characterized in that,
Enter flow-raising aeration biological filtering pool system by a high position from stream mode or pump supercharging hoisting way through residual ozone degraded cell system waste water after treatment and carry out degradation treatment;
A described high position is in stream mode, and waterhead is 0.5 ~ 1.0 meter.
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