CN105417777A - Sewage coagulation and adsorption sedimentation separation-separator anaerobic bio-gas regeneration treatment method - Google Patents
Sewage coagulation and adsorption sedimentation separation-separator anaerobic bio-gas regeneration treatment method Download PDFInfo
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention belongs to the technical field of sewage treatment in environmental engineering, and relates to the technology of sewage coagulation and adsorption sedimentation separation-separator anaerobic bio-gas regeneration treatment. According to the technology, firstly, sewage is reclaimed, and separated pollutants are delivered to an anaerobic bioreactor and transformed into biogas to reclaim the pollutants. Part of the biogas generated by anaerobic treatment is used for insulating the anaerobic reactor to improve the anaerobic treatment efficiency, and effective treatment in four seasons can be guaranteed. Anaerobic treatment is also a regenerating process of flocculants and adsorbents, and anaerobic biochemical residues can be returned to the adsorption and coagulation sedimentation process and used as adsorption flocculants for the second time. Parts of redundant anaerobic residues losing the adsorption capability are regularly dehydrated and incinerated by partial biogas, and are discharged after the anaerobic residues are completely harmless. Furthermore, durable pollutants adsorbed on the residues are incinerated in the process.
Description
Technical field
The invention belongs to the technical field of sewage in environmental engineering, relate to sewage Coagulation and Adsorption precipitate and separate-isolate anaerobic methane regeneration treating method.
Background technology
At present, the contradiction of Economic development and environmental pollution seriously constrains the tempo of China and world economy, and we face the serious and shortage of water resources two large problems of water pollutions.Biologic treating technique has been widely used more than 100 year as cost-effective environment project, serves very important effect in environment protection.But floor space is large, and working cost is high, remains the deadly defect of biological treatment.It is more efficient that people are devoted to exploitation, more energy-conservation sewage disposal technology.Recently, zero energy consumption resource utilization sewage disposal technology enjoys the concern of people, and endures to the fullest extent and denounce.The core of biological sewage treatment is the biological degradation of dirty water pollutant and innoxious, can be divided into two steps: one is that pollutent transfers to biophase from aqueous phase; Two is pollutent biochemical conversions in biophase.In first process, mainly physical diffusion process, the Pollutant levels around biophase are higher, and its velocity of diffusion is faster, enter biophasic speed also larger, for the sewage disposal of middle and high concentration, former water pollutant is enough high, and diffusion transfer speed and biodegradation rate adapt to substantially, for sewage of low concentration process, need to adopt suitable mode to concentrate Pollutant levels, so that be diffused rapidly to biophase, carry out biological degradation fast.In second process, one is make good use of the aerobic conversion that oxygen animalcule carries out pollutent, carbonic acid gas and water concerning target product contaminant hydrocarbon, although contamination transform is thorough in the process, but consume a large amount of molecular oxygen, become the beta maximum energy consumption of sewage disposal, the heat that biological process produces directly is taken away by waste water, is difficult to reclaim; Two is the conversions utilizing anaerobion to carry out pollutent, the a small amount of carbonic acid gas of methane and hydrogen and water concerning target product contaminant hydrocarbon, key does not need to provide molecular oxygen, decrease energy expenditure, energy output is had in treating processes, and the higher production capacity of Pollutant levels is larger, no matter the more important thing is that anaerobic treatment can adapt to very high organic concentration due to the restriction without oxygen delivery capacity, be original concentration or the concentration after concentrating.Simultaneously, a large amount of research work shows, because anaerobism is different from aerobic biochemical process, ability and the kind of both degradation of contaminant also have very large difference, although the anaerobe speed of growth is slow, contamination transform speed is also slow, but its can the kind of conversion pollutant many and high to the tolerance limit of hazardous contaminant, like this, sufficiently long pollutent-in the biological time, a large amount of pollutent can by anaerobic biotransformation.
Summary of the invention
Based on above-mentioned thinking, for the deficiency existed in existing sewage disposal technology, the present invention adopts Coagulation and Adsorption material to be separated by the enriching pollutants in sewage, and separate targets makes sewage reach discharge and reuse standard.First make sewage recycling, the pollutent separated sends into anaerobic biological reactor, is biogas, then realizes the resource utilization of pollutent by contamination transform.The biogas part that anaerobism produces, for the insulation of anaerobic reactor, improves the processing efficiency of anaerobism, ensures can effectively process throughout the year.Anaerobic treatment is also the regenerative process of flocculation agent sorbent material simultaneously, and anaerobic biological residue just can turn back to adsorption-flocculation settling process, and secondary uses as adhesive flocculant.Regularly by the anaerobism residue dehydration rear part biogas burning disposal losing adsorptive power unnecessary for a part, thorough innoxious rear discharge.This process also will be adsorbed on the persistent pollutant burning disposal on residue simultaneously.
Technical scheme of the present invention is: sewage Coagulation and Adsorption precipitate and separate-isolate anaerobic methane manipulation of regeneration technology, its technical process is: will live and all types of industries wastewater collection in sewage collecting pool, by sewage pump, sewage is delivered to Coagulation and Adsorption combined reaction pond and carry out Coagulation and Adsorption reaction, water pollutant coagulation is become floss, water soluble contaminants is adsorbed onto on sorbent material simultaneously, sewage containing throw out and granule adsorbent enters into settling bowl, supernatant liquor after settlement separate enters chemical precipitation and reclaims compound nitrogen phosphate fertilizer reaction tank, reuse after sewage discharge after precipitation pond for recovering precipitate and separate or sterilization, in settling bowl, the mud sludge pump containing suspended substance and sorbent material of precipitate and separate is transported in anaerobic reactor, carry out the anaerobic methane process of mud, after the biogas that anaerobic reactor produces is discharged from reactor head, enter devulcanizer, after removing hydrogen sulfide, biogas enters methane boiler burner combustion, the hot water produced recycles as the heat source of anaerobic reactor, natural pond slag in anaerobic reactor after biological degradation, contain the sorbent material after regeneration and degrade organic flocculation agent, after this mixing natural pond slag dehydration, major part turns back in Coagulation and Adsorption reaction tank, again be used in absorption and coagulation pollutent, after residue Coagulation and Adsorption agent through repeatedly recycling loses its remove, then after water extracter dehydration, use biogas combustion boiler combustion tail gas, dewater in tail gas drying machine, the second stage solid waste burning zone that dry mud after dehydration enters methane combustion furnace again burns, thoroughly innoxious, the tail gas of drying and dehydrating discharges after exhaust scrubber taste removal, and washing water turn back to Sewage treatment systems secondary treatment.
Anaerobic reactor is by sludge drier, biogas storage district, solid-liquid displacement zone, circulating water outlet, internal circulation pump, circulation fluid import, recycle liquid distributor, slag settling region, natural pond, accumulated slag bucket, letting cinder control valve and slush pump are formed, sludge drier is made up of steel vessel, inside scribbles impregnating material, equipment top is provided with settlement separate district, top, settlement separate district is biogas storage district, bottom is solid-liquid displacement zone, solid-liquid displacement zone Lower Half is provided with internal recycle water out, the two ends of internal circulation pump are connected with circulation fluid import with internal recycle water out respectively, anaerobism device interior is provided with recycle liquid distributor, the bottom of anaerobic reactor is provided with slag settling region, natural pond and accumulated slag bucket, the bottom of slag settling region, natural pond is provided with letting cinder control valve, accumulated slag bucket is connected with slush pump, the concentration of the Wastewater Pollutant handled by the present invention is 50-50000 milli gram/l, described flocculation agent is aluminium salt, molysite, silicon salt, starch base and cellulose base, chitin base, biological flocculant, polyacrylic acid series, polyacrylamide is serial, and sorbent material is gac, flyash, diatomite, zeolite, macroporous resin or ion exchange resin.Coagulation and Adsorption reaction tank can be designed to one-level or multipole.The quantity of settling tank is determined by the quantity in Coagulation and Adsorption pond, and both are corresponding relation.The coagulating agent that the design consideration of the settling tank residence time is selected and sorbent material different in kind and different, to reach good sedimentation effect, being no more than reuse standard when supernatant liquor suspended sediment concentration is no more than sewage drainage standard reuse is foundation.
In order to the discharge of stricter control nutrient nitrogen, phosphorus, sewage through Coagulation and Adsorption removes deliquescent nitrogen phosphorus through chemical precipitation method again, can adopt composite ultrafine fly ash ammonium phosphate magnesium processes, oxidation-precipitation method breakpoint chlorination denitrogenates and precipitate phosphorus and independent inorganic salt such as precipitator method calcium, aluminium, iron simultaneously according to the nitrogen and phosphorus content of sewage and the state of existence.
After the biogas that anaerobic reactor produces is discharged from reactor head, enter desulfurization unit, after removing hydrogen sulfide, biogas enters methane boiler burner combustion, and the hot water of generation recycles as the heat source of anaerobic reactor.Adopt wet method sodium hydroxide to remove hydrogen sulfide, sell as byproduct after the sodium sulphite crystallization of generation, this system is included within desulphurization system.
Drying after the slag dehydration of natural pond adopts the direct combustion tail gas of methane combustion furnace, evaporate the moisture in the slag of natural pond on the one hand, also the objectionable impurities in biogas combustion tail gas has been adsorbed on the other hand, then this natural pond slag enter methane combustion furnace second segment burn innoxious, realize the self-purification process of tail gas, this part is included in methane boiler burner.
The invention has the beneficial effects as follows: the concentration C OD that the present invention can process basic, normal, high concentration pollutent is from the waste water of the inorganic pollutant of 50 to 50000 millis gram/l, wastewater treatment particularly for low, middle concentration has more superiority, the absorption and coagulation agent volume adopting Coagulation and Adsorption to concentrate rear anaerobic treatment greatly reduces, both the volume of biochemical reactor had been saved, add the gas production rate of unit volume, additionally reduce loss amount and the heat loss amount of biogas.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention
Fig. 2 is the structural representation of anaerobic reactor of the present invention
In figure: 1, sewage collecting pool, 2, sewage pump, 3, Coagulation and Adsorption combined reaction pond, 4, settling bowl, 5, reaction tank, 6, precipitation pond for recovering, 7, sludge pump, 8, anaerobic reactor, 9, devulcanizer, 10, methane boiler burner, 11, sludge dewatering equipment, 12, exhaust scrubber, 13, sludge drier, 14, settlement separate district, 15, biogas storage district, 16, solid-liquid displacement zone, 17, circulating water outlet, 18, internal circulation pump, 19, circulation fluid import, 20, recycle liquid distributor, 21, slag settling region, natural pond, 22, accumulated slag bucket, 23, letting cinder control valve, 24, slush pump.
Embodiment
Below in conjunction with Fig. 1, Fig. 2 and embodiment, the invention will be further described:
Technical scheme of the present invention is: sewage Coagulation and Adsorption precipitate and separate-isolate anaerobic methane manipulation of regeneration technology, its technical process is: will live and all types of industries wastewater collection in sewage collecting pool 1, by sewage pump 2, sewage is delivered to Coagulation and Adsorption combined reaction pond 3 and carry out Coagulation and Adsorption reaction, water pollutant coagulation is become floss, water soluble contaminants is adsorbed onto on sorbent material simultaneously, sewage containing throw out and granule adsorbent enters into settling bowl 4, supernatant liquor after settlement separate enters chemical precipitation and reclaims compound nitrogen phosphate fertilizer reaction tank 5, after precipitation pond for recovering 6 precipitate and separate, sewage discharge or the rear reuse of sterilization, in settling bowl 4, the mud sludge pump 7 containing suspended substance and sorbent material of precipitate and separate is transported in anaerobic biological reactor 8, carry out the anaerobic methane process of mud.The biogas that anaerobism produces removes after hydrogen sulfide through devulcanizer 9 delivers to methane boiler burner 10, burn the hot water that produces for the heating of anaerobic reactor 8 and insulation, natural pond slag in anaerobic reactor 8 after biological degradation, containing regeneration after sorbent material and degrade organic flocculation agent, after this mixing natural pond slag dehydration, major part turns back in Coagulation and Adsorption combined reaction pond 3, is again used in absorption and coagulation pollutent; After residue Coagulation and Adsorption agent through repeatedly recycling loses its remove, then dewater through water extracter 11, the combustion tail gas of methane boiler burner 10 dewaters at tail gas drying machine 13, the second stage solid waste burning zone that dry mud after dehydration enters methane boiler burner 10 again burns, thoroughly innoxious, the tail gas of drying and dehydrating discharges after exhaust scrubber 12 taste removal, and washing water turn back to Sewage treatment systems secondary treatment.
Anaerobic reactor 8 is by sludge drier 13, biogas storage district 15, solid-liquid displacement zone 16, circulating water outlet 17, internal circulation pump 18, circulation fluid import 19, recycle liquid distributor 20, slag settling region, natural pond 21, accumulated slag bucket 22, letting cinder control valve 23 and slush pump 24 are formed, sludge drier 13 is made up of steel vessel, inside scribbles impregnating material, equipment top is provided with settlement separate district 14, top, settlement separate district 14 is biogas storage district 15, bottom is solid-liquid displacement zone 16, solid-liquid displacement zone 16 Lower Half is provided with internal recycle water out 17, the two ends of internal circulation pump 18 are connected with circulation fluid import 19 with internal recycle water out 17 respectively, anaerobism equipment 8 inside is provided with recycle liquid distributor 20, the bottom of anaerobic reactor 8 is provided with slag settling region, natural pond 21 and accumulated slag bucket 22, the bottom of slag settling region, natural pond 21 is provided with letting cinder control valve 23, accumulated slag bucket 22 is connected with slush pump 24, mud major part is turned back to Coagulation and Adsorption combined reaction pond 3 second stage employ by slush pump 24, is discharged to sludge dewatering equipment 11 on a small quantity, and entering sludge drier 13, then dried mud enters into methane boiler burner 10, the inorganic residues discharge after burning.Anaerobic reactor 8 is key equipments of this technology, its receive from settling tank 6 flocculating settling product and adsorbed the sorbent material of pollutent, anaerobic reactor 8 is the anaerobic fluidized bed reactor combined with bed of packings of outer circulation, opening for feed at upper middle part, discharge gate in bottom, material enter from upper middle part rear slowly go downwards to bottom, internal recycle power constantly impels material to move up simultaneously, form fluidized state, improve mass transfer effect, the uphill process of biogas also promotes the suspension of material.The collecting methane produced, to the top of reactor, enters into biogas storage tank and follow-up desulfurizing combustion system automatically.
Anaerobic reactor key design parameter volumetric loading and useful volume design variable are in table 1.
Table 1
The concentration C OD that the present invention can process basic, normal, high concentration pollutent is from the waste water of the inorganic pollutant of 50 to 50000 millis gram/l, wastewater treatment particularly for low, middle concentration has more superiority, because now directly adopt the sewage of anaerobic treatment the type, because Pollutant levels are lower, produce methane quantity less, biogas is dissolved in the water to be carried secretly away by water and loses a part again, and heating a large amount of sewage of low concentration needs more energy, and the heat that draining is taken away also is lost in environment and has gone.And the absorption and coagulation agent volume adopting Coagulation and Adsorption to concentrate rear anaerobic treatment greatly reduces, both save the volume of biochemical reactor, added the gas production rate of unit volume, additionally reduce loss amount and the heat loss amount of biogas.
The sewage quality scope that the present invention defines is in table 2.
Table 2
Flocculation agent of the present invention comprises: conventional aluminium salt, molysite, small molecules and the polymeric flocculants such as silicon salt, the organic polymer coargulator of conventional natural and synthetic is as starch base, cellulose base, chitin base, biological flocculant, polyacrylic acid series, polyacrylamide series etc., its fundamental principle selected is the colloid removed in water that can effectively flocculate, the pollutent of macromolecular compound and other types, no matter it has biodegradability or bio-refractory can use, can repeatedly recirculation using of bio-refractory, biodegradable, change biogas into and recycling.Determined by test and Selection when specifically processing the sewage of different sorts and concentration.
The usage quantity of different sorts flocculation agent selected by the present invention and the relation of water quality are in table 3.
Table 3
The sorbent material that the present invention selects comprises: universality sorbent material is as gac, and flyash, diatomite etc., singularity sorbent material is as adsorbed the zeolite of ammonia nitrogen, the macroporous resin of adsorb organic compound, ion exchange resin of Adsorption of Heavy Metals etc.The selection of sorbent material be with can by the dissolved organic matter in sewage and inorganic heavy metal ion and nitrogen and phosphorus thing adsorbing and removing to certain emission standard for target.Determined by test and Selection when specifically processing the sewage of different properties and concentration.
The sorbent material that the present invention is used and the relation between usage quantity and water quality are in table 4.
Table 4
Coagulation and Adsorption reaction tank 3 can be designed to one-level or multipole.Determine according to sewage kind and concentration, high density multicomponent sewage adopts multistage Coagulation and Adsorption, and the simple composition of lower concentration adopts one-level Coagulation and Adsorption.The determination of technology is determined by test.
The relation between the residence time of coagulating and progression and water quality of arranging in the present invention is in table 5.
Table 5
The quantitative design of settling tank 4 is determined according to the quantity in Coagulation and Adsorption pond 3, and both are one-to-one relationships.The coagulating agent that the design consideration of the settling tank residence time is selected and sorbent material different in kind and different, to reach good sedimentation effect, being no more than reuse standard when supernatant liquor suspended solids SS concentration is no more than sewage drainage standard reuse is foundation.
In order to the discharge of stricter control nutrient nitrogen, phosphorus, sewage through Coagulation and Adsorption removes deliquescent nitrogen phosphorus through chemical precipitation method again, can adopt composite ultrafine fly ash ammonium phosphate magnesium processes, oxidation-precipitation method breakpoint chlorination denitrogenates and precipitate phosphorus and independent inorganic salt such as precipitator method calcium, aluminium, iron simultaneously according to the nitrogen and phosphorus content of sewage and the state of existence.
The biogas that anaerobic reactor 8 produces enters devulcanizer 9 after discharging from reactor head, and after removing hydrogen sulfide, biogas enters in methane boiler burner 10 and burns, and the hot water of generation recycles as the heat source of anaerobic reactor 8.Adopt wet method sodium hydroxide to remove hydrogen sulfide, sell as byproduct after the sodium sulphite crystallization of generation, this system is included within desulphurization system.
Drying after the slag dehydration of natural pond adopts the direct combustion tail gas of methane combustion furnace, evaporate the moisture in the slag of natural pond on the one hand, also the objectionable impurities in biogas combustion tail gas has been adsorbed on the other hand, then this natural pond slag enter methane combustion furnace second segment burn innoxious, realize the self-purification process of tail gas, this part is included in methane boiler burner 10.
embodiment 1
When sewage load is 420 tons of/hour about 10,000 ton per days, organic concentration COD represents at 300 millis gram/l, after process, with COD, organic concentration represents that, at 50 millis gram/l, it is 0.25 kilogram that water per ton removes COD amount, and removing COD amount every day is 2500 kilograms.The COD removed in Coagulation and Adsorption process calculates by 0.8 gram COD/ gram flocculation adsorption agent butt, then the consumption of flocculation adsorption agent is: 3.13 tons/day, 1.30 tons/hour; Calculate according to natural pond slag water ratio 95%, the agent of wet basis Coagulation and Adsorption is 26 tons/hour.When time of equilibrium adsorption is designed to 1 hour, Coagulation and Adsorption pond useful volume 420 cubic metres, butt Coagulation and Adsorption dosage 1.30 tons, the concentration of suspension in Coagulation and Adsorption combined reaction pond 3 is 0.3%3000 milli gram/l.The residence time of settling bowl 4 is 3 hours, and useful volume is 1260 cubic metres, and the water ratio of precipitating sludge is 95%, and the cumulative volume of precipitating sludge is 26 tons/hour.The hydraulic detention time of mud after flocculation adsorption in anaerobic reactor 8 is designed to 96 hours, and the useful volume of anaerobic reactor 8 is 26 tons of/hour X96 hour=2496 cubic metres.The volumetric loading that removes of anaerobic reactor 8 is 2500 kilograms of COD/ days/2496 cubic metres=1.00 kilograms COD/ cubic meters, sky.Produce 0.4 cubic metre of biogas calculate according to often removing 1 kilogram of COD, daily output biogas 1000 cubic metres.Methane content of bilogas calculates according to 60%, and the biogas calorific value of every cubic metre is: 21000-25000KJ/ cubic meter, produces energy in theory daily to be: 21-25MJ/ days.The reclamation rate of natural pond slag calculates according to 96.7%, discharges residue natural pond slag 104 kilograms of butts every day, and the water ratio after sludge dewatering equipment 11 dewaters calculates according to 80%, discharges wet slag 520 kilograms every day, wherein moisture 416 kilograms.The moisture removing 30 degree according to evaporation calculates, and removing 416 kilograms of moisture content needs sensible heat 20-100 degree 139110KJ/ days 0.139MJ/ days, and removing 416 kilograms of moisture content needs latent heat 100 degree of 973772.8KJ/ days 0.974MJ/ days.The newly-increased natural pond quantity of slag entering anaerobic reactor 8 every day is: 21 tons of/hour X24 hour=504 tons/day; Heat 520 tons of natural pond slags to be warmed up to 30 degree of heats needed from 20 degree and to be: 21736000KJ/ days 21.736MJ/ days, three needs energy summation to be: 22848882.8KJ/ days 22.848MJ/ days.Heat remains basically stable, and does not consider the residue liberated heat of burning 10% and the heat of loss.
After flocculation adsorption sewage hypothesis containing 20 milli gram/l ammonia nitrogen and 3 milli gram/l phosphoric acid salt, oxidation-the precipitator method are adopted to remove remaining nitrogen phosphorus, reach ammonia nitrogen 8 milli gram/l, phosphoric acid salt 1 milli gram/l target, need removal of ammonia and nitrogen 12 milli gram/l, phosphoric acid salt 2 milli gram/l, adds oxidation precipitation agent 80 milli gram/l.
embodiment 2
When sewage load is 420 tons of/hour about 10,000 ton per days, organic concentration COD represents at 1000 millis gram/l, after process, with COD, organic concentration represents that, at 50 millis gram/l, it is 0.95 kilogram that water per ton removes COD amount, and removing COD amount every day is 9500 kilograms.The COD removed in Coagulation and Adsorption process calculates by 0.8 gram COD/ gram flocculation adsorption agent butt, then the consumption of flocculation adsorption agent is: 11.875 tons/day, 0.5 ton/hour; Calculate according to natural pond slag water ratio 95%, the agent of wet basis Coagulation and Adsorption is 2.5 tons/hour.When time of equilibrium adsorption is designed to 1 hour, the useful volume in Coagulation and Adsorption combined reaction pond 3 420 cubic metres, butt Coagulation and Adsorption dosage 2.5 tons, concentration of suspension 0.6%6000 milli gram/l in Coagulation and Adsorption combined reaction pond 3.Settling tank 4 residence time is 3 hours, and useful volume is 1260 cubic metres, and the water ratio of precipitating sludge is 95%, and the cumulative volume of precipitating sludge is 50 tons/hour.The water retention time of mud after flocculation adsorption in anaerobic reactor 8 is designed to 96 hours, and the useful volume of anaerobic reactor 8 is 50 tons of/hour X96 hour=4800 cubic metres.The volumetric loading that removes of anaerobic reactor 8 is 9500 kilograms of COD/ days/4800 cubic metres=1.98 kilograms COD/ cubic meters, sky.Produce 0.4 cubic metre of biogas calculate according to often removing 1 kilogram of COD, daily output biogas 3800 cubic metres.Methane content of bilogas calculates according to 60%, and the biogas calorific value of every cubic metre is: 21000-25000KJ/ cubic meter, produces energy in theory daily to be: 79.8-95MJ/ days.The reclamation rate of natural pond slag calculates according to 96%, discharges residue natural pond slag 400 kilograms of butts every day, and the water ratio after sludge dewatering equipment 11 dewaters calculates according to 80%, discharges wet slag 2000 kilograms every day, wherein moisture 1600 kilograms.The moisture removing 30 degree according to evaporation calculates, and removing 1600 kilograms of moisture needs sensible heat 20-100 degree 528618KJ/ days 0.529MJ/ days, and removing 1600 kilograms of moisture needs latent heat 100 degree of 3700336.6KJ/ days 3.70MJ/ days.The newly-increased natural pond quantity of slag entering anaerobic reactor 8 every day is: 80 tons of/hour X24 hour=1920 tons/day; Heat 1920 tons of natural pond slags to be warmed up to 30 degree of heats needed from 20 degree and to be: 80055360KJ/ days 80.055MJ/ days, three needs energy summation to be: 84284314.6KJ/ days 84.284MJ/ days.Heat remains basically stable, and does not consider the residue liberated heat of burning 10% and the heat of loss.
After flocculation adsorption sewage hypothesis containing 60 milli gram/l ammonia nitrogen and 10 milli gram/l phosphoric acid salt, oxidation-the precipitator method are adopted to remove remaining nitrogen phosphorus, reach ammonia nitrogen 8 milli gram/l, phosphoric acid salt 1 milli gram/l target, need removal of ammonia and nitrogen 52 milli gram/l, phosphoric acid salt 9 milli gram/l, adds oxidation precipitation agent 400 milli gram/l.
embodiment 3
When sewage load is 420 tons of/hour about 10,000 ton per days, organic concentration COD represents at 10000 millis gram/l, after process, with COD, organic concentration represents that, at 50 millis gram/l, it is 9.95 kilograms that water per ton removes COD amount, and removing COD amount every day is 99500 kilograms.The COD removed in Coagulation and Adsorption process calculates by 0.8 gram COD/ gram flocculation adsorption agent butt, then the consumption of flocculation adsorption agent is: 124 tons/day, 5.18 tons/hour; Calculate according to natural pond slag water ratio 95%, the agent of wet basis Coagulation and Adsorption is 103.6 tons/hour.When time of equilibrium adsorption is designed to 10 hours, the useful volume 4200 cubic metres in Coagulation and Adsorption combined reaction pond 3 (is designed to three stage countercurrent flocculation adsorption, butt Coagulation and Adsorption dosage 51.8 tons, concentration of suspension 1.2%12000 milli gram/l in Coagulation and Adsorption combined reaction pond 3.The residence time of settling bowl 4 is 10 hours, and useful volume is 4200 cubic metres, and the water ratio of precipitating sludge is 95%, and the cumulative volume of precipitating sludge is 103.6 tons/hour.The hydraulic detention time of mud after flocculation adsorption in anaerobic reactor is designed to 96 hours, and the useful volume of anaerobic reactor 8 is 103.6 tons of/hour X96 hour=9945.6 cubic metres.The volumetric loading that removes of anaerobic reactor is 99500 kilograms of COD/ days/9945.6 cubic metres=10.00 kilograms COD/ cubic meters, sky.Produce 0.4 cubic metre of biogas calculate according to often removing 1 kilogram of COD, daily output biogas 39800 cubic metres.Methane content of bilogas calculates according to 60%, and the biogas calorific value of every cubic metre is: 21000-25000KJ/ cubic meter, produces energy in theory daily to be: 835.8-995MJ/ days.The reclamation rate of natural pond slag calculates according to 97%, discharges residue natural pond slag 4150 kilograms of butts every day, and the water ratio after water extracter 11 dewaters calculates according to 80%, discharges wet slag 20750 kilograms every day, wherein moisture 16600 kilograms.The moisture removing 30 degree according to evaporation calculates, and removing 16600 kilograms of moisture needs sensible heat 20-100 degree 5488375KJ/ days 5.49MJ/ days, and removing 16600 kilograms of moisture needs latent heat 100 degree of 142140992.2KJ/ days 14.21MJ/ days.The newly-increased natural pond quantity of slag entering anaerobic reactor 8 every day is: 829 tons of/hour X24 hour=19896 tons/day; Heat 19896 tons of natural pond slags to be warmed up to 30 degree of heats needed from 20 degree and to be: 829573668KJ/ days 829.573MJ/ days, three needs energy summation to be: 977203035.2KJ/ days 977.203MJ/ days.Heat remains basically stable, and does not consider the residue liberated heat of burning 10% and the heat of loss.
After flocculation adsorption sewage hypothesis containing 500 milli gram/l ammonia nitrogen and 100 milli gram/l phosphoric acid salt, oxidation-the precipitator method are adopted to remove remaining nitrogen phosphorus, reach ammonia nitrogen 8 milli gram/l, phosphoric acid salt 1 milli gram/l target, need removal of ammonia and nitrogen 492 milli gram/l, phosphoric acid salt 99 milli gram/l, adds oxidation precipitation agent 4000 milli gram/l.
Claims (7)
1. sewage Coagulation and Adsorption precipitate and separate-isolate anaerobic methane manipulation of regeneration technology, it is characterized in that, its technical process is: will live and all types of industries wastewater collection in sewage collecting pool (1), by sewage pump (2), sewage is delivered to Coagulation and Adsorption combined reaction pond (3) and carry out Coagulation and Adsorption reaction, water pollutant coagulation is become floss, water soluble contaminants is adsorbed onto on sorbent material simultaneously, sewage containing throw out and granule adsorbent enters into settling bowl (4), supernatant liquor after settlement separate enters chemical precipitation and reclaims compound nitrogen phosphate fertilizer reaction tank (5), reuse after sewage discharge after precipitation pond for recovering (6) precipitate and separate or sterilization, in settling bowl (4), the mud sludge pump (7) containing suspended substance and sorbent material of precipitate and separate is transported in anaerobic reactor (8), carry out the anaerobic methane process of mud, after the biogas that anaerobic reactor (8) produces is discharged from reactor head, enter devulcanizer (9), after removing hydrogen sulfide, biogas enters methane boiler burner (10) burning, the hot water produced recycles as the heat source of anaerobic reactor (8), natural pond slag in anaerobic reactor (8) after biological degradation, contain the sorbent material after regeneration and degrade organic flocculation agent, after this mixing natural pond slag dehydration, major part turns back in Coagulation and Adsorption reaction tank (3), again be used in absorption and coagulation pollutent, after residue Coagulation and Adsorption agent through repeatedly recycling loses its remove, then after water extracter (11) dehydration, with methane boiler burner (10) combustion tail gas, dewater at tail gas drying machine (13), the second stage solid waste burning zone that dry mud after dehydration enters methane boiler burner (10) again burns, thoroughly innoxious, the tail gas of drying and dehydrating discharges after exhaust scrubber (12) taste removal, and washing water turn back to Sewage treatment systems secondary treatment.
2. the sewage Coagulation and Adsorption precipitate and separate according to claims 1-isolate anaerobic methane manipulation of regeneration technology, it is characterized in that, described anaerobic reactor (8) is by sludge drier 13, biogas storage district (15), solid-liquid displacement zone (16), circulating water outlet (17), internal circulation pump (18), circulation fluid import (19), recycle liquid distributor (20), slag settling region, natural pond (21), accumulated slag bucket (22), letting cinder control valve (23) and slush pump (24) are formed, equipment body (13) is made up of steel vessel, inside scribbles impregnating material, equipment top is provided with settlement separate district (14), settlement separate district (14) top is biogas storage district (15), bottom is solid-liquid displacement zone (16), solid-liquid displacement zone (16) Lower Half is provided with internal recycle water out (17), the two ends of internal circulation pump (18) are connected with circulation fluid import (19) with internal recycle water out (17) respectively, anaerobism equipment (8) inside is provided with recycle liquid distributor (20), the bottom of anaerobic reactor (8) is provided with slag settling region, natural pond (21) and accumulated slag bucket (22), the bottom of slag settling region, natural pond (21) is provided with letting cinder control valve (23), accumulated slag bucket (22) is connected with slush pump (24).
3. the sewage Coagulation and Adsorption precipitate and separate according to claims 1-isolate anaerobic methane manipulation of regeneration technology, is characterized in that, the concentration of described Wastewater Pollutant is 50-50000 milli gram/l.
4. the sewage Coagulation and Adsorption precipitate and separate according to claims 1-isolate anaerobic methaneization is manipulation of regeneration technology simultaneously, it is characterized in that, described flocculation agent is aluminium salt, molysite, silicon salt, starch base, cellulose base, chitin base, biological flocculant, polyacrylic acid are serial or polyacrylamide is serial.
5. the sewage Coagulation and Adsorption precipitate and separate according to claims 1-isolate anaerobic methane manipulation of regeneration technology, it is characterized in that, described sorbent material is gac, flyash, diatomite, zeolite, macroporous resin or ion exchange resin.
6. the sewage Coagulation and Adsorption precipitate and separate according to claims 1-isolate anaerobic methane manipulation of regeneration technology, is characterized in that, described Coagulation and Adsorption reaction tank (3) can be designed to one-level or multipole.
7. the sewage Coagulation and Adsorption precipitate and separate according to claims 1-isolate anaerobic methane manipulation of regeneration technology, is characterized in that, the quantity of described settling tank (4) is determined by the quantity of Coagulation and Adsorption pond (3), and both are corresponding relation.
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