CN105819567A - Self-circulation anaerobic reactor - Google Patents

Self-circulation anaerobic reactor Download PDF

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Publication number
CN105819567A
CN105819567A CN201610309620.2A CN201610309620A CN105819567A CN 105819567 A CN105819567 A CN 105819567A CN 201610309620 A CN201610309620 A CN 201610309620A CN 105819567 A CN105819567 A CN 105819567A
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Prior art keywords
self
reactor
water
anaerobic
circulation
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CN201610309620.2A
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Chinese (zh)
Inventor
王金利
龚丽军
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Beijing Xunshida Environmental Protection Technology Co Ltd
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Beijing Xunshida Environmental Protection Technology Co Ltd
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Priority to CN201610309620.2A priority Critical patent/CN105819567A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/2846Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/2866Particular arrangements for anaerobic reactors
    • C02F3/2873Particular arrangements for anaerobic reactors with internal draft tube circulation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/2866Particular arrangements for anaerobic reactors
    • C02F3/2893Particular arrangements for anaerobic reactors with biogas recycling
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/08Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/04Flow arrangements
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The invention discloses a self-circulation anaerobic reactor. The self-circulation anaerobic reactor comprises a tank body, a water distributor, a sewage return pipe, a marsh gas flow guide device, an isolating inner cylinder, a three-phase separator and the like. The tank body is internally divided into several regions which are a mixing region, a main reaction region, a main marsh gas separating region, an auxiliary reaction region and a solid, liquid and gas three-phase separating region (containing a setting region) through the devices. Inner circulation is automatically formed by sewage in the regions under the raising action of marsh gas. As inner circulation is formed, rising flow speed of the main reaction region is increased, the contact area between organic matter in the main reaction region and anaerobic biological bacteria is increased, and water quality purification speed is increased. The concentration of input water is reduced by the self circulation, the concentration gradient of organic acid in a reactor is reduced, the living environment of the anaerobic biological bacteria is improved, and the degradation rate of the anaerobic biological bacteria is increased. As the self-circulation reactor is ingenious in structure, the self-circulation amount can be several times that of an existing anaerobic reactor. Output water is high and stable in quality, the requirement for designing anaerobic water output can be met without multi-level arrangement.

Description

Self-circulating anaerobic reactor
Technical field
The present invention relates to a kind of wastewater processing technology, be specifically related to oneSelf-circulating anaerobic reactor
Background technology
Organic waste in sewage is to cause the most important pollutant of environmental pollution, it be make waters go bad, smelly main cause of turning black.Organic waste can exist in waste water in the way of float, jelly or dissolved organic matter, main using TS (solid contents), COD (COD) and Biochemical oxygen demand (BOD) as monitoring objective in water pollution control.
It is said that in general, biological method is to remove the useless most economical effective method of Organic substance in water, particularly the most suitable to the organic wastewater that BOD content in waste water is higher.Biological method is to utilize the metabolic activity during microbial life, organic waste is decomposed into simple inorganic matter thus the process of organics removal pollution, according to conditions of demand to oxygen in metabolic process, microorganism can be divided into aerobic microbiological, anaerobe and aerobic-anaerobic microbe therebetween, therefore, corresponding sewage treatment process can also be divided into three major types: Aerobic biological process makes good use of the metabolic activity of oxygen animalcule to process waste water, it needs constantly to supplement in waste water large quantity of air or oxygen, to maintain the enough dissolved oxygen concentrations required for wherein aerobic microbiological, under aerobic condition, Organic substance is finally oxidised to water and carbon dioxide etc., partial organic substances by microbial assimilation to produce new microbial cell;Anaerobic bio-treated then utilizes the metabolic process of anaerobe, and without Organic substance being converted into inorganic matter and a small amount of cellular material in the case of providing oxygen, these inorganic matters mainly include substantial amounts of biogas (i.e. biogas) and water.The main component of biogas is methane and the carbon dioxide of 1/3 of about 2/3, is a kind of callable energy;Aerobic-anaerobic microbe has the characteristic of anaerobic and aerobic, i.e. can be in aerobic lower existence, it is also possible under anaerobic survive.
Waste water fermentation process is the wastewater processing technology of a kind of low cost, and it is again waste water to be processed utilize, with energy recovery, a kind of technology combined.In great majority development including ChinaCountryFace serious insufficient funds, theseCountryNeed not only effectively, the simple but also technology of low cost, anaerobic technology thus be particularly suitable for meState of stateA kind of technology of feelings, waste water fermentation treatment technology can simultaneously serve as a core of production of energy and Environment Protection System, and its product can actively be utilized and produce economic worth.Such as, the clean water processed can be used for fish pond and breed fish, irrigates and apply fertilizer;The biogas produced can be as the energy;Excess sludge can be as fertilizer and for soil improvement.Anaerobic bio-treated is as utilizing the metabolic characteristic of anerobe, under conditions of not needing to provide external source energy, to be reduced Organic substance as hydrogen acceptor, has the methane gas of energy value simultaneously.Anaerobic biotreatment method is applicable not only to high concentrated organic wastewater, and water inlet BOD maximum concentration is up to tens thousand of mg/l, it is possible to be applicable to low-concentration organic waste water, such as municipal sewage etc..
Anaerobic Methods in Treating develops quickly in recent years in sewage treatment area, is abatement organic pollution, reduces the effective way of operating cost.Anaerobic bio-treated process energy consumption is low;Organic volumetric loading is high, generally 5-10kgCOD/m3.d, the highest up to 30-50kgCOD/m3.d;Surplus sludge volume is few;Anaerobe is low to nutritional need, resistance to poison is strong, degradable organic matter molecular mass high;Anti impulsion load ability is strong;The biogas of output is a kind of clean energy resource.
Advocating recycling economy in the whole society, pay close attention to trade waste and implement today of resource recycling, anaerobic bio-treated clearly can make the selection process of sewage recycling.In recent years, anerobic sowage treatment technology development is the rapidest, various new technologies, new method constantly occur, include anaerobic contact method, upflow anaerobic sludge blanket process, baffle-type anaerobic process, anaerobic biofilter, anaerobic expanded bed and fluid bed, and third generation anaerobic technique EGSB and IC anaerobic reactor, develop the rapidest.
Applying most anaerobic biological reactors in the world at present is UASB anaerobic biological reactor.This reactor is referred to as second filial generation anaerobic biological reactor.It is characterized in technology maturation, manufactures simplicity.Along with the utilization that fluidized reaction is theoretical, the UASB reactor with metastable Anaerobe bed as feature demonstrates the inferior position that reaction efficiency is low.And the anaerobic biological reactors such as main flow third generation reactor such as EGSB, IC use fluidized reaction theoretical, the most significantly pushing away further by application and the reaction efficiency of anaerobic biological reactor, market share also rises year by year.
But UASB, EGSB and IC reactor all has some shortcomings, UASB floor space is big, and uniformity of water distribution is poor, and water conservancy load is less;EGSB takes up an area little, but EGSB typically has one huge " skull ", the effect of this " skull " is used to carry out gas, solid, liquid three phase separation, if this " skull " is big not, gas, the effect of solid, liquid three phase separation just do not reach, this situation brings the biggest burden to the construction of EGSB, and additionally EGSB also has an exteenal reflux system, relies on this system, Anaerobe in reactor is fluidized, but too increases substantial amounts of power consumption;IC need not huge " skull ", also without exteenal reflux system, but need higher " head ", the effect of this " head " of exceeding is in addition to providing gas, solid, liquid three phase separation, main effect is that the biogas realizing relying on reactor self to produce carries out reactor internal reflux, but this " head " exceeded is not involved in Anaerobe fluidized reaction, therefore consumes partial reaction device dischargeable capacity, and construction cost is greatly improved.
Present invention employs special internal structure, use the amount difference waste water density containing biogas different cleverly and produce the principle of convection current, it is made to need not huge " skull ", need not exteenal reflux system, also without " head " that additionally exceed, but can obtain more preferable fluid effect, suitable application area is the most wide.
Summary of the invention:
The present invention provide a kind of control simple, invest anaerobic reactor less, that processing cost low energy consumption is low, available floc sludge starts and sewage can circulate voluntarily.
The technology of the present invention is: include tank body, water-locator, sewage backflow pipe, biogas guiding device, the isolation part composition such as inner core and three phase separator;By said apparatus, tank interior is divided into several region, is mixed zone, main reaction region, main biogas Disengagement zone, side reaction district and solid-liquid-gas three phase Disengagement zone (containing settling zone) respectively.
Mixed zone: waste water is intake from reactor bottom, the mud mixture refluxed with granule sludge and side reaction district mixes in this district effectively.
Main reaction chamber: the mud mixture that mixed zone is formed enters this district, under high concentration sludge effect, major part Organic substance is degraded and is converted into biogas.The violent disturbance of mixed liquor height upflow velocity and biogas makes mud in this reaction zone in expanding completely and fluidized state, strengthen the contact of muddy water surface, enhance muddy water mass transfer effect, and mud remains high activity therefrom.
Main biogas Disengagement zone: along with increasing of biogas output, a part of mud mixture rises along passage between biogas guiding device and tank body with biogas, and the biogas mixed liquor of rising separates in main biogas Disengagement zone, and biogas enters abhiseca and stores, and mixed liquor enters side reaction district.
Side reaction district: the waste water after the anaerobic treatment of main reaction region, after main biogas Disengagement zone separates, lowers into side reaction district by biogas guiding device with isolation inner core direct channel.This district's sludge concentration is relatively low, and in waste water, major part Organic substance is degraded in main reaction region, and therefore biogas generation amount is less.
Self-circulation system is set up: in side reaction district and biogas return duct, air water is smaller, density is big compared with main reaction region and biogas guiding device outer tunnel, according to convective principles, mud mixture then returns to the mixed zone of bottom along return duct, mud and water inlet with reactor bottom are sufficiently mixed, it is achieved that the inside self-loopa of mixed liquor.
Solid-liquid-gas three phase Disengagement zone (containing settling zone): the mud mixture major part in side reaction district returns to the mixed zone of bottom along return duct, another part carries out solid-liquid separation in three phase separator settling zone, supernatant is drained by outlet pipe, and the granule sludge of precipitation returns to side reaction district.
The formation of self-loopa increases the upflow velocity in main reactor district, makes the Organic substance of main reaction region increase with Anaerobe bacterium contact area, accelerates purification of water quality speed;Self-loopa simultaneously dilutes influent concentration, reduces organic acid concentration gradient in reactor, improves the living environment of Anaerobe bacterium, improves the degradation rate of Anaerobe bacterium.Owing to self-loopa reactor structure is ingenious, its self-loopa amount can be several times as much as existing anaerobic reactor, effluent quality is high and stable simultaneously, need not multistage setting can once reach to design anaerobic effluent requirement, treatment effeciency is hence above existing anaerobic biological reactor more than one times, and investment can reduce more than 50%.
Compared with prior art, the remarkable result of the present invention is:
1) processing cost is low, recoverable biogas, occupation area of equipment are little
2) floor space is little, self-circulation sewage, it is not necessary to any power, and energy consumption is low;
3) volumetric loading is high, can reach 8~40kgCOD/m3.d;
4) inlet COD concentration scope is wide, can reach 2000~30000mg/L,
5) applied range, can be applicable to high organic concentration waste water in wine brewing, starch processing, bio-pharmaceuticals, organic chemical industry, livestock and poultry cultivation, papermaking etc. and processes.
Accompanying drawing explanation
Fig. 1It it is structural representation of the present inventionFigure
Fig. 2It it is water-locator of the present inventionFigure
In figureLabelling: 101-mixed zone;102-main reaction region;103-side reaction district;104-main biogas Disengagement zone;105-solid-liquid-gas three phase Disengagement zone;1-water inlet pipe;2-mixing water-locator;3-tank body;4-self-loopa pipe;5-biogas gas operated device;6-isolates inner core;7-three phase separator;8-water outlet weir plate;9-water-locator shower nozzle
It is embodied as
Below in conjunction with detailed description of the invention, the present invention is described in further detail, but should not invention is construed as being only limitted to examples described below, and all technology realized based on present invention belong to the scope of the invention.
Embodiment one
Jiangsu biomass energy company limited biodiesel wastewater, including plant effluent, major pollutants are ethanol, isopropanol etc.;Feed reservoir waste water, major pollutants are alcohol, ketone etc.;Boiler room waste water, cleaning waste water and sanitary wastewater, after the mixing of above waste water, the waste water water yield is that 15m3/h, CODcr are about 100000mg/L, and sulfate is 50000mg/L, ammonia nitrogen 50mg/L, SS2000mg/L;Using pretreatment+two-stage anaerobic+two grades aerobic+MBR PROCESS FOR TREATMENT, wherein first order anaerobism uses thisSelf-circulating anaerobic reactor, after preprocessed and backflow, to enter this anaerobic reactor water quality be that CODcr is about 30000mg/L, and sulfate is 10000mg/L, ammonia nitrogen 50mg/L, SS1000mg/L.
Technological parameter when this reactor runs:
Volumetric loading: 15kgCOD/m3.d;Inlet COD concentration: 30000mg/L;COD clearance: 70%;Height for reactor 22m.
Circulation anaerobic reactor of the present invention: include water inlet pipe 1;Mixing water-locator 2;Tank body 3;Self-loopa pipe 4;Biogas gas operated device 5;Isolation inner core 6;Three phase separator 7;Water outlet weir plate 8;Water-locator shower nozzle 9 parts such as grade form;Tank body uses cylinder of steel body, and ratio of height to diameter is 2-3, and top is provided with sealing biogas air chamber;Water inlet pipe is arranged in tank base, is formed by organizing perforated pipe more, and every perforated pipe is imported and exported and is equipped with valve, it is simple to cleaning during water inlet pipe blocking during operation;Water inlet pipe bottom is discharge pipeline, lower 100mm than water inlet pipe, and water inlet pipe top is recirculated water water-locator, and water-locator is that radioactivity is arranged, every pipe is radially provided with shower nozzle, and such shower nozzle is sprayed water to side, and during operation, sewage can rotate rising in tank body;Being connected with water-locator bottom self-loopa pipe, top is connected bottom biogas gas operated device;Biogas gas operated device structure be bottom be cone structure, top is cylinder, and cylinder and cone use and weld, and is 50-100mm with tank body spacing outside this cylinder;Isolation inner core top forms biogas air chamber with tank body welding, and lower support is inside biogas gas operated device, and formation rigidly fixes, the internally installed three phase separator of inner core, and inner core top is provided with water outlet weir plate.Additionally tank base is provided with discharge pipeline, and outside is provided with cat ladder and platform.
Arrange through said structure, reactor is separated into several region, including mixed zone, main reaction region, side reaction district, main biogas Disengagement zone, solid-liquid-gas three phase Disengagement zone and biogas storage district.
The present invention is achieved by operation, and waste water enters mixed zone from reactor bottom, and the mud mixture refluxed with granule sludge and side reaction district mixes in this district effectively;The mud mixture being mixed to form chooses to install entrance main reactor district, under the high concentration sludge effect of main reaction region, major part Organic substance is degraded and is converted into biogas, the violent disturbance of mixed liquor height upflow velocity and biogas makes in this reaction zone mud in expanding completely and fluidized state, strengthen the contact of muddy water surface, enhancing muddy water mass transfer effect, mud remains high activity therefrom;Along with biogas rises, mud mixture rises along passage between biogas guiding device and tank body with biogas, and the biogas mixed liquor of rising separates in main biogas Disengagement zone, and biogas enters abhiseca and stores, and mixed liquor enters side reaction district;Side reaction district sludge concentration is relatively low, and in waste water, major part Organic substance is degraded in main reaction region, and therefore biogas generation amount is less.
Such as Fig. 1Shown in, main reaction region and biogas Disengagement zone, biogas Disengagement zone and side reaction district, a vertical passageway is had respectively between side reaction district and main reaction region, in three passages, main reaction region is significantly larger than remaining two passage with the methane content in the passage of biogas Disengagement zone, thus main reaction region is also far smaller than remaining two passage with the mixed liquor proportion in the channel region of biogas Disengagement zone, thus make to create pressure differential between main reaction region and side reaction district, side reaction district pressure is much larger than main reaction region, therefore Anaerobe bacterium and the water in side reaction district just comes back to main reaction region, thus create by main reaction region to biogas Disengagement zone, biogas Disengagement zone is to side reaction district, side reaction district returns the Automatic Cycle of main reaction region.
Automatically in, circulation increases the upflow velocity of main reaction region, makes the Organic substance of main reaction region increase with Anaerobe bacterium contact area, accelerates purification of water quality speed;Interior circulation dilutes influent concentration, reduces organic acid concentration gradient in reactor, improves the living environment of Anaerobe bacterium, improves the degradation rate of Anaerobe bacterium.Owing to this reactor structure is ingenious, in it, circulating load can be several times as much as existing anaerobic reactor, effluent quality is high and stable simultaneously, it is not necessary to multistage setting can once reach to design anaerobic effluent requirement, and therefore treatment effeciency can be higher than existing anaerobic biological reactor more than one times.

Claims (5)

1. self-circulating anaerobic reactor, including water inlet pipe 1, mixes water-locator 2, tank body 3, self-loopa pipe 4, biogas gas operated device 5, isolates inner core 6, three phase separator 7, water outlet weir plate 8, water-locator shower nozzle 9;By said apparatus, tank interior is divided into several region, is mixed zone, main reaction region, main biogas Disengagement zone, side reaction district and solid-liquid-gas three phase Disengagement zone respectively.
2. self-circulating anaerobic reactor as claimed in claim 1, it is characterised in that reactor is provided with backflow water distributor, and the Water outlet spray head of water distributor radially vertical distribution and direction are identical.
3. self-circulating anaerobic reactor as claimed in claim 1, it is characterised in that reactor center is provided with mixed-liquor return pipe.
4. self-circulating anaerobic reactor as claimed in claim 1, it is characterised in that gas operated device cylindrical is 50-100mm with the spacing of tank body.
5. self-circulating anaerobic reactor as claimed in claim 1, it is characterised in that reactor top is provided with three phase separator.
CN201610309620.2A 2016-05-11 2016-05-11 Self-circulation anaerobic reactor Pending CN105819567A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106277311A (en) * 2016-10-21 2017-01-04 大连碧蓝节能环保科技有限公司 Water conservancy diversion impeller up flow anaerobic sludge blanket reactor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106277311A (en) * 2016-10-21 2017-01-04 大连碧蓝节能环保科技有限公司 Water conservancy diversion impeller up flow anaerobic sludge blanket reactor
CN106277311B (en) * 2016-10-21 2019-04-23 佛山市禅城区污泥处理有限公司 Water conservancy diversion impeller up flow anaerobic sludge blanket reactor

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