CN105347464A - Integrated reactor based on electrode-supergravity biological rotating discs and treatment method therefor - Google Patents
Integrated reactor based on electrode-supergravity biological rotating discs and treatment method therefor Download PDFInfo
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- CN105347464A CN105347464A CN201510842981.9A CN201510842981A CN105347464A CN 105347464 A CN105347464 A CN 105347464A CN 201510842981 A CN201510842981 A CN 201510842981A CN 105347464 A CN105347464 A CN 105347464A
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- blodisc
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- 239000002912 waste gas Substances 0.000 claims abstract description 26
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 239000001301 oxygen Substances 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 13
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 238000010992 reflux Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000009987 spinning Methods 0.000 claims description 9
- 230000000813 microbial effect Effects 0.000 claims description 8
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
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- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 238000010792 warming Methods 0.000 claims description 7
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- 238000011049 filling Methods 0.000 claims description 6
- YPJKMVATUPSWOH-UHFFFAOYSA-N nitrooxidanyl Chemical compound [O][N+]([O-])=O YPJKMVATUPSWOH-UHFFFAOYSA-N 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 5
- 238000011068 loading method Methods 0.000 claims description 5
- 229920002492 poly(sulfone) Polymers 0.000 claims description 5
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 5
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 5
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000003411 electrode reaction Methods 0.000 claims description 4
- 230000001131 transforming effect Effects 0.000 claims description 4
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
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- 238000005345 coagulation Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000012258 culturing Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 3
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- 239000002904 solvent Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000002166 wet spinning Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000032770 biofilm formation Effects 0.000 abstract 1
- 239000000969 carrier Substances 0.000 abstract 1
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- 238000006243 chemical reaction Methods 0.000 description 7
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- 239000010865 sewage Substances 0.000 description 4
- 102000004190 Enzymes Human genes 0.000 description 3
- 108090000790 Enzymes Proteins 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- -1 nitrite anions Chemical class 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
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- YBVAXJOZZAJCLA-UHFFFAOYSA-N nitric acid nitrous acid Chemical compound ON=O.O[N+]([O-])=O YBVAXJOZZAJCLA-UHFFFAOYSA-N 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
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- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/005—Combined electrochemical biological processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/95—Specific microorganisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/10—Gas phase, e.g. by using aerosols
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Molecular Biology (AREA)
- Dispersion Chemistry (AREA)
- Electrochemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses an integrated reactor based on electrode-supergravity biological rotating discs and a treatment method therefor. A center shaft is arranged inside the reactor, the shaft body structure of the center shaft is a coaxial double-layer sleeve, two parts namely an air passage and a liquid passage are formed, and a through hole is formed in the outer wall of the air passage. The interior of a shell is partitioned into a plurality of communicated cavities by partition boards, each cavity is internally provided with two biological rotating discs which are fixed on the center shaft and are connected to a cathode and an anode of a power supply respectively, and the biological rotating discs serve as pairing electrodes while being taken as biofilm formation carriers. A plurality of hollow fibrous membranes are densely arranged in the middle of each disc body. According to the reactor disclosed by the invention, three technologies of electrodes, supergravity and biological rotating discs are organically combined into one reactor, so that the reactor can utilize the supergravity to carry out high efficiency mass transfer on nitrogen-containing waste gas; the nitrogen-containing waste gas is quickly dissolved in waste water; and then the biological rotating discs serve as the electrodes, so that the denitrification of microorganisms is promoted. The reactor is suitable for synchronously removing the nitrogen-containing waste gas and waste water with high concentration, and the treatment effect is greatly superior to that of an ordinary reactor.
Description
Technical field
The invention belongs to field of environment protection equipment, be specifically related to a kind of integrated reactor based on electrode-hypergravity blodisc and treatment process thereof.
Background technology
The existence of pollutent is the left significant problem of human production activity, and its treatment process should have reaction conditions gentleness, non-secondary pollution, environmental friendliness and be easy to the features such as control.Electrochemical process, with feature that is efficient and environmental protection, has certain advantage in harmless treatment organic pollutants.
Biological denitrification removes NO in water
3-a kind of very effective method, it by the effect of microorganism by NO
3-be reduced to free of contamination N
2, wherein used electron donor is generally organism.But because organic content is low in some trade effluents and sanitary sewage, denitrification process cannot carry out smoothly.For this problem, the nineties in last century, the concepts such as Mellor, are fixed in cathode surface for the enzyme of denitrification and electron mediator (dyestuff), find electrode on it the enzyme fixed provide reducing power.Afterwards, Sakakibara etc. replace denitrification enzyme with denitrifying bacteria, develop microbial film. electrode reactor BER, and for denitrogenation research, pulled open the prelude of BER denitrification process.Be improved to cartridge type reactor from initial separation type reactor, they establish the stable state living model of electrode biomembrane denilrification system, and summarize the positive impact of carbon-point anodic reaction on denitrogenation.2002, Prosnansky etc. improved reactor types, and negative electrode uses activated carbon granule as electrode materials, separates between anode and negative electrode with silicon rubber sponge layer, thus effectively stops the mixing of oxygen and hydrogen.But current biofilm-electrode, when processing higher concentration NO waste gas, still exists that mass-transfer efficiency is not high, the problem of processing rate, awaits further improving electrode materials, structure of reactor.
Summary of the invention
The object of the invention is to solve problems of the prior art, and a kind of integrated reactor based on electrode-hypergravity blodisc and treatment process thereof are provided.Concrete technical scheme:
Based on an integrated reactor for electrode-hypergravity blodisc, comprise housing, central shaft, swivel joint, liquid absorbing pump, blodisc, hollow-fibre membrane, motor, return line, liquid-inlet pipe, ozonizer, dividing plate, reflux pump, intake chamber, liquid outtake chamber, vapor pipe, off-gas pump, drain pipe, inlet pipe;
Central shaft arranges along the axle center of housing and runs through housing, and axis body is made up of coaxial double-layer sleeve pipe and is divided into two portions, and outer annular chamber is air flue, and center is fluid passage; Enclosure interior is the chamber that several communicate by baffle for separating, each chamber roof is all communicated with vapor pipe, vapor pipe is provided with off-gas pump, the leftmost side and the rightmost side are respectively intake chamber and liquid outtake chamber, intake chamber, liquid outtake chamber are connected by return line, return line is provided with the reflux pump for providing backflow power, and intake chamber also communicates with liquid-inlet pipe; Be provided with two panels in all the other each chambers to be fixed on central shaft and the blodisc connecting power positive cathode respectively, be used as counter-electrodes as while biofilm carrier; Be provided with some the hollow-fibre membranes arranged around central shaft in the middle of two panels blodisc, hollow-fibre membrane one end is closed, and the other end communicates with fluid passage through central shaft outer wall, and liquid in housing is discharged by fluid passage after tubular fibre membrane filtration; Air flue outer wall in the middle of two panels blodisc has through hole, makes gas in pipe enter between two panels blodisc; Motor is arranged at central shaft one end, rotates with central shaft for driving blodisc and hollow-fibre membrane; Inlet pipe one end is connected with fluid passage with the air flue of central shaft by swivel joint respectively with drain pipe one end, and the drain pipe the other end connects liquid absorbing pump, and the inlet pipe the other end connects ozonizer.
As preferably, described blodisc adopts graphite cake as material, and the blodisc wherein as negative electrode plates activated carbon fiber outward at graphite cake.
As preferably, described blodisc is also provided with the constant temp. warming layer for maintaining blodisc surface temperature between graphite cake and activated carbon fiber.
As preferably, be coaxially arranged with several radiuses between two panels blodisc to differ and the annular mounting block insulated, hollow-fibre membrane is through the annular mounting block of inner ring, and one end is fixed on the annular mounting block of outmost turns, hollow-fibre membrane can not be subjected to displacement relative to blodisc when rotating.
As preferably, the blodisc in a chamber is provided with contrarotation device, makes the blodisc being positioned at adjacent two chambers be that reverse direction rotates.
As preferably, blodisc is fixed on central shaft by bearing, and the central shaft outer wall of bearing side is provided with the gear teeth in one week, and blodisc is provided with the internal wheel with central axis, is connected between the gear teeth of internal wheel and central shaft outer wall by transmitting gear; In two chambers of its median septum both sides, the transmitting gear in a chamber is 2, and the transmitting gear in another chamber is 3, and transmitting gear is all identical, by the gear teeth of central shaft outer wall successively to internal gear transmission.
As preferably, described dividing plate is telescopic dividing plate, comprises retaining plate and extension plate, and retaining plate arranges along cross section and is fixed on housing, and leaves space between retaining plate one end and housing; Extension plate is nested in retaining plate, and is connected with thrust unit, and thrust unit is used for being released by extension plate and filling up the space between retaining plate one end and housing, makes the chamber of dividing plate both sides mutually isolated.
As preferably, some exhausting holes evenly being offered by described dividing plate, while counter-electrodes being formed for making the blodisc of dividing plate both sides, reducing the hydraulic loading cycle of waste water in blodisc rotary course in dividing plate two side cavity.
As preferably, described hollow-fibre membrane adopts dry-jet wet-spinning silk method, and its concrete steps are as follows:
The raw material of film-casting liquid is:
Polymkeric substance: polysulfones (PES)/polyvinylidene difluoride (PVDF) (PVDF) 20 ~ 30%
Solvent: N-Methyl pyrrolidone (NMP) 60% ~ 80%
Additive: polyvinylpyrrolidone (PVP)/polyoxyethylene glycol (PEG) 1 ~ 5%
Above-mentioned raw materials is mixed with film-casting liquid, in oil bath 65 DEG C, stirs 24h, vacuumize, leave standstill 12h deaeration;
Be core liquid with deionized water and carry out precipitation bath, then carrying out spinning, obtain hollow-fibre membrane, spinning process condition is:
Film-casting liquid temperature: 35 ~ 55 DEG C
Coagulation bath temperature: 20 ~ 30 DEG C
The clearance of spinning nozzle and precipitation bath liquid level: 10 ~ 20cm
Material liquid tank pressure: 0.01 ~ 0.05MPa
Core flow velocity: 20 ~ 25mL/min.
Use described reactor synchronously to remove a method for nitrogenous effluent waste gas, comprise the steps:
1) in reactor, inject pending waste water and mud, carry out culturing sludge, enrichment, domestication, and make blodisc, hollow-fibre membrane biofilm;
2) water inlet is stopped after filling nitrogenous effluent by liquid-inlet pipe in reactor;
3) nitrogenous waste gas is passed into be connected to ozonizer, NO is oxidized to NO
2, produce oxygen simultaneously;
4) extension plate in dividing plate stretches out, and adjacent chamber is separated; Control blodisc again and carry out rotation formation hypergravity current, simultaneously by step 3) oxidation after mixed gas enter in reactor from inlet pipe by the air flue of central shaft, and by ventilating pit, waste gas is discharged between two panels blodisc, broken up as micro-bubble by hollow-fibre membrane, utilize hypergravity current to extend gas-liquid contact time and accelerate the rate of mass transfer of oxynitride, making the nitrogenous substances in waste gas be converted to NO
3 -, utilize the nitrification oxygen supply that the oxygen in waste gas is microorganism on microbial film, purified gas is discharged by top vent pipe simultaneously, and off-gas pump pumping speed is consistent with inlet pipe feed rate;
5) as NO in waste water
3 -when content reaches preset value, reduce central axis speed to 10 ~ 50rpm, extension plate is regained in dividing plate simultaneously, adjacent chamber is connected; Utilize contrarotation device that the blodisc in adjacent different chamber is rotated in the opposite direction, the water flow energy in different chamber forms chordwise solid stream of water, and is again evacuated to first chamber by return line and reflux pump when arriving last chamber; Utilize simultaneously constant temp. warming layer regulate blodisc surface and reactor in temperature to preset value;
6) stop by step 3) oxidation after mixed gas pass into reactor, useless content of oxygen dissolved in water is reduced; To the two panels blodisc energising in same chamber, it is made to form counter-electrodes, the electronics that the microbial film that hollow-fibre membrane is formed utilizes electrode reaction to provide carries out denitrification, and nitrate radical is become nitrogen with transforming nitrite, and the nitrogen of generation is discharged by vapor pipe;
7) waste water after process, under the effect of liquid absorbing pump, through tubular fibre membrane filtration, is discharged by drain pipe, is more again passed into the process in new waste water circulation abovementioned steps.
The present invention is relative to rotating bio-disc reactor of the prior art, and tool has the following advantages:
1) electrode, hypergravity, blodisc three kinds of technology are organically combined in a reactor, make this reactor can utilize hypergravity that nitrogenous waste gas is carried out efficient mass transfer, rapid solution is in waste water, and recycling blodisc, as electrode, promotes the denitrification of microorganism.
2) anode blodisc adopts graphite cake as material, and negative electrode blodisc plates activated carbon fiber outward at graphite cake, can make full use of the huge specific surface area of activated carbon fiber to increase the biomass of negative electrode, improves clearance.
3) hollow-fibre membrane is set two pieces of blodisc intermediate annular, while playing out water filtration, also with driving body when rotating, enables the water in chamber follow rotation.
4) through the central shaft of particular design, the input that can simultaneously realize gas and the waste liquid be disposed export;
5) constant temp. warming layer is set between graphite cake and activated carbon fiber, in order to regulate the optimal temperature of microorganism in reaction process, can better carries out the process of sewage.
6) contrarotation device can make the blodisc being positioned at adjacent two chambers be that reverse direction rotates, and is conducive to the waste water flowing promoted in denitrification process, creates hydraulics and make mass transfer even.
7) dividing plate described in adopts telescopic design, and when hypergravity can be made to rotate again, the chamber of dividing plate both sides is mutually isolated, can not produce hydraulic loading cycle.
8) can adapt to through the hollow-fibre membrane of special process the stress that hypergravity brings preferably, improve work-ing life.
9) method of synchronous removal nitrogenous effluent waste gas of the present invention, can be applicable to nitrogenous waste gas and the waste water of Fast synchronization process high density, and treatment effect is higher than common response device.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the nitrogenous effluent exhaust gas integration reactor based on electrode-hypergravity blodisc;
Fig. 2 is the sectional view of the nitrogenous effluent exhaust gas integration reactor based on electrode-hypergravity blodisc;
Fig. 3 position swivel joint of the present invention arranges schematic diagram;
Fig. 4 is center spindle structure schematic diagram of the present invention;
Fig. 5 is blodisc of the present invention and hollow-fibre membrane whole installation schematic diagram;
Fig. 6 is that blodisc of the present invention arranges schematic diagram;
Fig. 7 is that annular mounting block of the present invention arranges schematic diagram;
Fig. 8 is telescopic septum plane schematic diagram of the present invention;
Fig. 9 is telescopic diaphragm internal structural representation of the present invention;
In figure: housing 1, central shaft 2, swivel joint 3, liquid absorbing pump 4, blodisc 5, hollow-fibre membrane 6, motor 7, return line 8, liquid-inlet pipe 9, ozonizer 10, dividing plate 11, reflux pump 12, intake chamber 13, liquid outtake chamber 14, vapor pipe 15, off-gas pump 16, drain pipe 17, inlet pipe 18, annular mounting block 19, retaining plate 111 and extension plate 112.
Embodiment
Below in conjunction with accompanying drawing the present invention be further elaborated and illustrate.In the present invention, the technical characteristic of each embodiment is not having under conflicting prerequisite, all can carry out respective combination.
As illustrated in fig. 1 and 2, based on an integrated reactor for electrode-hypergravity blodisc, comprise housing 1, central shaft 2, swivel joint 3, liquid absorbing pump 4, blodisc 5, hollow-fibre membrane 6, motor 7, return line 8, liquid-inlet pipe 9, ozonizer 10, dividing plate 11, reflux pump 12, intake chamber 13, liquid outtake chamber 14, vapor pipe 15, off-gas pump 16, drain pipe 17, inlet pipe 18, air flue 201, fluid passage 202;
Central shaft 2 arranges along the axle center of housing 1 and runs through housing 1, is driven rotate by motor 7.Central shaft 2, can also simultaneously for delivering gas and liquid except playing gearing.As shown in Figure 4, its axis structure is coaxial double-layer sleeve pipe, and is divided into two portions by this coaxial double-layer sleeve pipe, and the outer annular chamber of outer tube and inner sleeve centre is the air flue 201 for delivering gas, and in inner sleeve is the fluid passage 202 for carrying liquid.Housing 1 inside is divided into several chambers communicated by dividing plate 11, and the bulkhead apertures direction of adjacent chamber is contrary, and the wastewater streams making formation longer passes through journey.Each chamber roof is all communicated with vapor pipe 15, and vapor pipe 15 is provided with off-gas pump 16.In order to prevent waste water in rotary course from also entering vapor pipe, arrange valve at vapor pipe and shell of reactor connecting place, making it must reach certain pressure can Exhaust Gas.When the gas in chamber is saved bit by bit to a certain extent, open off-gas pump with constant speed extracting gases.During actual use, have liquid unavoidably and be drawn out of, therefore can arrange container for storing liquid in subsequent pipeline, collected by this effluent part, next time refills in reactor.The reactor leftmost side and the rightmost side are respectively intake chamber 13 and liquid outtake chamber 14, and intake chamber 13, liquid outtake chamber 14 are connected by return line 8, and return line 8 is provided with the reflux pump 12 for providing backflow power, and intake chamber 13 also communicates with liquid-inlet pipe 9; Be provided with two panels in all the other each chambers to be fixed on central shaft 2 and the blodisc 5 connecting power positive cathode respectively, be used as counter-electrodes as while biofilm carrier.As illustrated in Figures 5 and 6, many the hollow-fibre membranes 6 arranged around central shaft 2 are densely covered with in the middle of two panels blodisc 5, hollow-fibre membrane 6 one end is closed, the other end communicates with fluid passage 202 through central shaft 2 outer wall, liquid in housing 1 is discharged by fluid passage 202 after hollow-fibre membrane 6 filters, waste water is obtained in reactor close-coupled processing, can directly discharge.Hollow-fibre membrane 6 is mutually isolated with air flue 201.Air flue 201 outer wall in the middle of two panels blodisc 5 has through hole, enables gas in pipe enter between two panels blodisc 5 by through hole; Motor 7 is arranged at central shaft 2 one end, rotates with central shaft 2 for driving blodisc 5 and hollow-fibre membrane 6.During rotation, just can not beaten rapidly by through hole expellant gas and spread as small bubbles, accelerate mass transfer.As shown in Figure 3, due to central shaft high speed rotating, therefore inlet pipe 18 one end is connected with fluid passage 202 with the air flue 201 of central shaft 2 by swivel joint 3 respectively with drain pipe 17 one end, and drain pipe 17 the other end connects liquid absorbing pump 4.Due to implication NO more in nitrogenous waste gas, therefore inlet pipe 18 the other end connects ozonizer 10, for being oxidized NO, provides oxygen simultaneously.Blodisc 5 is powered by brush.This reactor can improve NO greatly
xrate of mass transfer, and do not need to add EDTA.
Compare with the denitrification reaction with organism being only electron donor, after increase electric current, organism and hydrogen can simultaneously as denitrification reaction electron donor and be utilized, speed of response can be improved and reach complete denitrogenation, and denitrogenation speed strengthens with the increasing of electric current.After organism is finished, denitrification reaction depends on the hydrogen that electrolysis produces.
When blodisc 5 is as electrode, reply material carries out special selection.As a kind of optimal way, blodisc 5 adopts graphite cake as material.In order to the advantages of material be used, negative electrode adopts graphite cake to do skeleton, and layer of active carbon fiber is respectively pasted on both sides, the electrode finally made.Activated carbon fiber considerably increases specific surface area, improves the processing efficiency of device simultaneously.
Because the temperature of reaction of microorganism has larger impact to wastewater treatment efficiency and rate of mass transfer, therefore between graphite cake and activated carbon fiber, be also provided with the constant temp. warming layer for maintaining blodisc surface temperature at described blodisc 5, and this temperature maintains between 25 ~ 35 usually.
As shown in Figure 7, because hollow-fibre membrane is comparatively fragile, be therefore coaxially arranged with several radiuses between two panels blodisc 5 and differ and the annular mounting block 19 insulated.The hollow-fibre membrane 6 that annular mounting block 19 is arranged in different radii place stationary annular, and the outer end of hollow-fibre membrane 6 is fixed on the annular mounting block 19 of outmost turns, and hollow-fibre membrane 6 can not be subjected to displacement relative to blodisc 5 when rotating.The annular mounting block 19 of an outmost turns is only shown in Fig. 7, many can be arranged with one heart at radial different positions place.
Hydraulics in electrode reactor is comparatively large on final process result impact, and the waste water in conventional reactor, due to incomplete mixing, can reduce treatment effect.In this reactor, the blodisc 5 in a chamber is provided with contrarotation device, and the blodisc 5 being positioned at adjacent two chambers is rotated in reverse direction.And in actual use, the drainage plate of adjustable position can be loaded onto in chamber, when hypergravity rotates, pack up drainage plate, when denitrification, open drainage plate, by the backflow of return line, the waste water in whole reactor is flowed mixing effectively.Test proves, contrarotation device can improve water treatment effect effectively.
Present invention also offers a kind of implementation of above-mentioned contrarotation device, blodisc 5 is fixed on central shaft 2 by bearing, central shaft 2 outer wall of bearing side is provided with the gear teeth in one week, blodisc 5 is provided with the internal wheel coaxial with central shaft 2, is connected between the gear teeth of internal wheel and central shaft 2 outer wall by transmitting gear; In two chambers of its median septum 11 both sides, transmitting gear in a chamber is 2, transmitting gear in another chamber is 3, and transmitting gear is identical gear, by the gear teeth of central shaft 2 outer wall successively to internal gear transmission, drive first gear by central shaft, then drive second gear (if there be the 3rd by it, also similarly transmission is carried out), and rotated by outermost gear driven internal wheel.Therefore, have the blodisc of 2 transmitting gears and have the blodisc of 3 transmitting gears, its sense of rotation is inevitable different.And due to transmitting gear identical, its rotating speed but can be consistent.
In hypergravity rotary course, because each chamber communicates, but blodisc sense of rotation is contrary, therefore will inevitably cause hydraulic loading cycle.Therefore particular design has been carried out to dividing plate.As a kind of embodiment, as shown in Figure 8, dividing plate 11 adopts telescopic dividing plate, and its body comprises retaining plate 111 and extension plate 112, and retaining plate 111 arranges along cross section and is fixed on housing 1, and leaves space between retaining plate 111 one end and housing 1; Extension plate 112 is nested in retaining plate 111, and is connected with thrust unit 113, and thrust unit 113, for being released by extension plate 112 and filling up the space between retaining plate 111 one end and housing 1, makes the chamber of dividing plate 11 both sides mutually isolated.The setting of thrust unit 113 can be as shown in Figure 9.
In order to make electrode be used more effectively, some exhausting holes evenly being offered by described dividing plate 11, also can form counter-electrodes for making between the two panels blodisc 5 of dividing plate 11 both sides.Meanwhile, owing to being only provided with through hole, the hydraulic loading cycle of waste water in blodisc 5 rotary course in dividing plate 11 liang of side cavity therefore also can be reduced.
In this device, when hypergravity rotates, hollow-fibre membrane 6 need have stronger compressive resistance simultaneously owing to wanting direct filtration water outlet, need have excellent strainability.In the present invention, hollow-fibre membrane adopts dry-jet wet-spinning silk method, and its concrete steps are as follows:
The raw material of film-casting liquid is:
Polymkeric substance: polysulfones (PES)/polyvinylidene difluoride (PVDF) (PVDF) 20 ~ 30%
Solvent: N-Methyl pyrrolidone (NMP) 60% ~ 80%
Additive: polyvinylpyrrolidone (PVP)/polyoxyethylene glycol (PEG) 1 ~ 5%
Above-mentioned raw materials is mixed with film-casting liquid, in oil bath 65 DEG C, stirs 24h, vacuumize, leave standstill 12h deaeration;
Be core liquid with deionized water and carry out precipitation bath, then carrying out spinning, obtain hollow-fibre membrane, spinning process condition is:
Film-casting liquid temperature: 35 ~ 55 DEG C
Coagulation bath temperature: 20 ~ 30 DEG C
The clearance of spinning nozzle and precipitation bath liquid level: 10 ~ 20cm
Material liquid tank pressure: 0.01 ~ 0.05MPa
Core flow velocity: 20 ~ 25mL/min.
Hollow-fibre membrane prepared by present method, its stretching resistance performance is given prominence to, and filter effect is good, and its work-ing life is than long 2 ~ 3 times of the hollow-fibre membrane of certain class commercially available.
Based on said apparatus, the present invention proposes a kind of method using this reactor synchronously to remove nitrogenous effluent waste gas, comprise the steps:
1) in reactor, inject pending waste water and containing the mud of bacterial classification, carry out culturing sludge, enrichment, domestication successively according to relevant waste water quality, blodisc 5 after this process completes, can be made, hollow-fibre membrane 6 all obtains biofilm; After completing biofilm, mud major part can discharge reactor.
2) water inlet is stopped after filling nitrogenous effluent by liquid-inlet pipe 9 in reactor.
3) nitrogenous waste gas is passed into be connected to ozonizer, NO is oxidized to NO
2, produce oxygen simultaneously.
4) extension plate 112 in dividing plate 11 stretches out, and adjacent chamber is separated; Control blodisc 5 again and carry out rotation formation hypergravity current, simultaneously by step 3) oxidation after mixed gas enter in reactor from inlet pipe by the air flue 201 of central shaft 2, and by ventilating pit, waste gas is discharged between two panels blodisc 5, broken up as micro-bubble by hollow-fibre membrane 6, utilize hypergravity current to extend gas-liquid contact time and accelerate the rate of mass transfer of oxynitride, making the nitrogenous substances in waste gas be converted to NO
3 -, utilize the nitrification oxygen supply that the oxygen in waste gas is microorganism on microbial film, purified gas is discharged by top vent pipe 15 simultaneously, and off-gas pump 16 pumping speed is consistent with inlet pipe 18 feed rate, to reduce the possibility that waste water enters vapor pipe as far as possible.
5) as NO in waste water
3 -when content reaches preset value, reduce central shaft 2 slewing rate to 10 ~ 50rpm, extension plate 112 is regained in dividing plate 11 simultaneously, adjacent chamber is connected; Utilize contrarotation device that the blodisc 5 in adjacent different chamber is rotated in the opposite direction, the water flow energy in different chamber forms chordwise solid stream of water, and is again evacuated to first chamber by return line 8 and reflux pump 12 when arriving last chamber; Utilize simultaneously constant temp. warming layer regulate blodisc surface and reactor in temperature to preset value.
6) stop by step 3) oxidation after mixed gas pass into reactor, useless content of oxygen dissolved in water is reduced; Two panels blodisc 5 in same chamber is energized, it is made to form counter-electrodes, the electronics that the microbial film that hollow-fibre membrane is formed utilizes electrode reaction to provide carries out denitrification, and nitrate radical is become nitrogen with transforming nitrite, and the nitrogen of generation is discharged by vapor pipe 15.
7) waste water after process, under the effect of liquid absorbing pump 4, filters through hollow-fibre membrane 6, is discharged by drain pipe 17, more again pass into the process in new waste water circulation abovementioned steps.
During actual use, in order to continuous process can be realized, multiple stage reactor coupling be can be carried out, waste gas ventilation and denitrifying process carried out successively.
Embodiment
Device in multiple optimal way described above is combined, namely with the method for device as illustrated in fig. 1 and 2 and aforesaid synchronous removal nitrogenous effluent waste gas, the flue gas that NO concentration is 1100ppm is processed, flue gas is passed into and is connected to ozonizer (outlet ozone concn is 200mg/L, and outlet mixed gas flow is 0.5m
3/ h) middle gas-holder after, the NO of 60% is become NO soluble in water by ozone oxidation
2, produce oxygen simultaneously.NO, NO
2, O
2pass in the reactor that volume is 10L with 5L/min after mixing in gas-holder, under the hypergravity effect that rotating speed is 300 ~ 700rpm, NO and the flow velocity passed in reactor are that the nitric wastewater of 2.5L/min has good mass transfer effect, sewage quality is COD concentration is that 5000mg/L, BOD concentration is 1500mg/L, ammonia nitrogen concentration is 50mg/L, NO can be dissolved completely and form nitrate radical and nitrite anions, NO
2be dissolved in sewage and form nitrate radical, pass into nitric wastewater in reactor at O
2condition issues raw nitrification and ammonium root is changed into nitrate radical and nitrite anions.The microbial film formed on hollow-fibre membrane and on blodisc utilizes voltage for 3V, and current density is 0.2A/m
2the electronics that provides of electrode reaction carry out denitrification, nitrogen is become to discharge with transforming nitrite nitrate radical, by processing the clearance of rear nitrogen oxides of exhaust gas more than 99.6%, in the waste water of discharging, COD is 10.2mg/L, BOD is 4.7mg/L, and ammonia nitrogen concentration is 0.9mg/L, and nitrate concentration is 0.11mg/L, specific conductivity is 1.0mS/cm, reaches emission standard completely.Surperficial device provided by the invention can process nitrogenous effluent and waste gas effectively simultaneously thus.
Above-described embodiment is one of the present invention preferably scheme, and so it is not intended to limiting the invention, and all technical schemes taking the mode of equivalent replacement or equivalent transformation to obtain, all drop in protection scope of the present invention.
Claims (10)
1. the integrated reactor based on electrode-hypergravity blodisc, it is characterized in that, comprise housing (1), central shaft (2), swivel joint (3), liquid absorbing pump (4), blodisc (5), hollow-fibre membrane (6), motor (7), return line (8), liquid-inlet pipe (9), ozonizer (10), dividing plate (11), reflux pump (12), intake chamber (13), liquid outtake chamber (14), vapor pipe (15), off-gas pump (16), drain pipe (17), inlet pipe (18);
Central shaft (2) arranges along the axle center of housing (1) and runs through housing (1), and axis body is made up of coaxial double-layer sleeve pipe and is divided into two portions, outer annular chamber is air flue (201), and center is fluid passage (202); Housing (1) inside is divided into several chambers communicated by dividing plate (11), each chamber roof is all communicated with vapor pipe (15), vapor pipe is provided with off-gas pump (16), the leftmost side and the rightmost side are respectively intake chamber (13) and liquid outtake chamber (14), intake chamber (13), liquid outtake chamber (14) are connected by return line (8), return line (8) is provided with the reflux pump (12) for providing backflow power, and intake chamber (13) also communicates with liquid-inlet pipe (9); Being provided with two panels in all the other each chambers, to be fixed on central shaft (2) upper and connect the blodisc (5) of power positive cathode respectively, is used as counter-electrodes as while biofilm carrier; Some the hollow-fibre membranes (6) arranged around central shaft (2) are provided with in the middle of two panels blodisc (5), hollow-fibre membrane (6) one end is closed, the other end communicates with fluid passage (202) through central shaft (2) outer wall, and housing (1) interior liquid is discharged by fluid passage (202) after hollow-fibre membrane (6) filters; Air flue (201) outer wall in the middle of two panels blodisc (5) has through hole, makes gas in pipe enter between two panels blodisc (5); Motor (7) is arranged at central shaft (2) one end, rotates with central shaft (2) for driving blodisc (5) and hollow-fibre membrane (6); Inlet pipe (18) one end is connected with fluid passage (202) with the air flue (201) of central shaft (2) by swivel joint (3) respectively with drain pipe (17) one end, drain pipe (17) the other end connects liquid absorbing pump (4), and inlet pipe (18) the other end connects ozonizer (10).
2. as claimed in claim 1 based on the integrated reactor of electrode-hypergravity blodisc, it is characterized in that, described blodisc (5) adopts graphite cake as material, and the blodisc wherein as negative electrode plates activated carbon fiber outward at graphite cake.
3. as claimed in claim 2 based on the integrated reactor of electrode-hypergravity blodisc, it is characterized in that, described blodisc (5) is also provided with the constant temp. warming layer for maintaining blodisc surface temperature between graphite cake and activated carbon fiber.
4. as claimed in claim 3 based on the integrated reactor of electrode-hypergravity blodisc, it is characterized in that, be coaxially arranged with several radiuses between two panels blodisc (5) to differ and the annular mounting block (19) insulated, hollow-fibre membrane (6) is through the annular mounting block (19) of inner ring, and one end is fixed on the annular mounting block (19) of outmost turns, hollow-fibre membrane (6) can not be subjected to displacement relative to blodisc (5) when rotating.
5. as claimed in claim 4 based on the integrated reactor of electrode-hypergravity blodisc, it is characterized in that, blodisc (5) in a chamber is provided with contrarotation device, and the blodisc (5) being positioned at adjacent two chambers is rotated in reverse direction.
6. as claimed in claim 5 based on the integrated reactor of electrode-hypergravity blodisc, it is characterized in that, blodisc (5) is fixed on central shaft (2) by bearing, central shaft (2) outer wall of bearing side is provided with the gear teeth in one week, blodisc (5) is provided with the internal wheel coaxial with central shaft (2), is connected between the gear teeth of internal wheel and central shaft (2) outer wall by transmitting gear; In two chambers of its median septum (11) both sides, the transmitting gear in a chamber is 2, and the transmitting gear in another chamber is 3, and transmitting gear is all identical, by the gear teeth of central shaft (2) outer wall successively to internal gear transmission.
7. as claimed in claim 6 based on the integrated reactor of electrode-hypergravity blodisc, it is characterized in that, described dividing plate (11) is telescopic dividing plate, comprise retaining plate (111) and extension plate (112), retaining plate (111) arranges along cross section and is fixed on housing (1), and leaves space between retaining plate (111) one end and housing (1); Extension plate (112) is nested in retaining plate (111), and be connected with thrust unit (113), thrust unit (113), for being released by extension plate (112) and filling up the space between retaining plate (111) one end and housing (1), makes the chamber of dividing plate (11) both sides mutually isolated.
8. as claimed in claim 1 based on the integrated reactor of electrode-hypergravity blodisc, it is characterized in that, some exhausting holes evenly offered by described dividing plate (11), while counter-electrodes can being formed for making the blodisc (5) of dividing plate (11) both sides, reduce the hydraulic loading cycle of waste water in blodisc (5) rotary course in dividing plate (11) two side cavity.
9. as claimed in claim 1 based on the integrated reactor of electrode-hypergravity blodisc, it is characterized in that, described hollow-fibre membrane (6) adopts dry-jet wet-spinning silk method, and its concrete steps are as follows:
The raw material of film-casting liquid is:
Polymkeric substance: polysulfones/polyvinylidene difluoride (PVDF) 20 ~ 30%
Solvent: N-Methyl pyrrolidone 60% ~ 80%
Additive: polyvinylpyrrolidone/polyoxyethylene glycol 1 ~ 5%
Above-mentioned raw materials is mixed with film-casting liquid, in oil bath 65 DEG C, stirs 24h, vacuumize, leave standstill 12h deaeration;
Be core liquid with deionized water and carry out precipitation bath, then carrying out spinning, obtain hollow-fibre membrane, spinning process condition is:
Film-casting liquid temperature: 35 ~ 55 DEG C
Coagulation bath temperature: 20 ~ 30 DEG C
The clearance of spinning nozzle and precipitation bath liquid level: 10 ~ 20cm
Material liquid tank pressure: 0.01 ~ 0.05MPa
Core flow velocity: 20 ~ 25mL/min.
10. use reactor described in claim 7 synchronously to remove a method for nitrogenous effluent waste gas, it is characterized in that, comprise the steps:
1) in reactor, inject pending nitrogenous effluent and mud, carry out culturing sludge, enrichment, domestication, and make blodisc (5), hollow-fibre membrane (6) biofilm;
2) water inlet is stopped after filling nitrogenous effluent by liquid-inlet pipe (9) in reactor;
3) nitrogenous waste gas is passed into be connected to ozonizer, NO is oxidized to NO
2, produce oxygen simultaneously;
4) extension plate (112) in dividing plate (11) stretches out, and adjacent chamber is separated; Control blodisc (5) again and carry out rotation formation hypergravity current, simultaneously by step 3) mixed gas after oxidation enters in reactor from inlet pipe by the air flue (201) of central shaft (2), and by ventilating pit, waste gas is discharged between two panels blodisc (5), broken up as micro-bubble by hollow-fibre membrane (6), utilize hypergravity current to extend gas-liquid contact time and accelerate the rate of mass transfer of oxynitride, making the nitrogenous substances in waste gas be converted to NO
3 -, utilize the nitrification oxygen supply that the oxygen in waste gas is microorganism on microbial film, purified gas is discharged by top vent pipe (15), and off-gas pump (16) pumping speed is consistent with inlet pipe (18) feed rate simultaneously;
5) as NO in waste water
3 -when content reaches preset value, reduce central shaft (2) slewing rate to 10 ~ 50rpm, extension plate (112) is regained in dividing plate (11) simultaneously, adjacent chamber is connected; Utilize contrarotation device that the blodisc in adjacent different chamber (5) is rotated in the opposite direction, water flow energy in different chamber forms chordwise solid stream of water, and is again evacuated to first chamber by return line (8) and reflux pump (12) when arriving last chamber; Utilize simultaneously constant temp. warming layer regulate blodisc surface and reactor in temperature to preset value;
6) stop by step 3) oxidation after mixed gas pass into reactor, useless content of oxygen dissolved in water is reduced; To two panels blodisc (5) energising in same chamber, it is made to form counter-electrodes, the electronics that the microbial film that hollow-fibre membrane is formed utilizes electrode reaction to provide carries out denitrification, nitrate radical is become nitrogen with transforming nitrite, and the nitrogen of generation is discharged by vapor pipe (15);
7) waste water after process, under the effect of liquid absorbing pump (4), filters through hollow-fibre membrane (6), is discharged, more again pass into the process in new waste water circulation abovementioned steps by drain pipe (17).
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| CN111115581A (en) * | 2020-01-06 | 2020-05-08 | 南京航空航天大学 | High-purity airborne oxygen and nitrogen production system and working method based on membrane separation technology |
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| CN118767674A (en) * | 2024-09-02 | 2024-10-15 | 大连海事大学 | A new type of rotating disk reaction device for absorbing ship exhaust gas |
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