CN103910460A - Coal chemical industry high-concentration wastewater treatment method and apparatus - Google Patents
Coal chemical industry high-concentration wastewater treatment method and apparatus Download PDFInfo
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- CN103910460A CN103910460A CN201210594202.4A CN201210594202A CN103910460A CN 103910460 A CN103910460 A CN 103910460A CN 201210594202 A CN201210594202 A CN 201210594202A CN 103910460 A CN103910460 A CN 103910460A
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- Separation Using Semi-Permeable Membranes (AREA)
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Abstract
The invention provides a coal chemical industry high-concentration wastewater treatment method and an apparatus which can solve the problems of low flux and high membrane pollution when an MBR (membrane bioreactor) is used for coal chemical industry wastewater treatment in the prior art. The coal chemical industry high-concentration wastewater treatment apparatus comprises an oil separation device, a flocculation reaction device communicated with the oil separation device, an ultra-micro air flotation device communicated with the flocculation reaction device, an advanced oxidation device communicated with the ultra-micro air flotation device, a hydrolysis and acidification device communicated with the advanced oxidation device, a denitrification device communicated with the hydrolysis and acidification device, an anoxic device communicated with the denitrification device, and an aerobic MBR device which comprises a plurality of MBR membranes arranged in the aerobic MBR device and is communicated with the anoxic device. The coal chemical industry high-concentration wastewater treatment method and the device provided by the invention have the beneficial effects that the pretreatment is complete, the subsequent treatment difficulty is low, and the biochemical treatment effect is ensured so as to be favorable for reducing membrane pollution; in addition, the cleaning frequency of the membranes is low and the service life is long; and furthermore, the MBR outlet water is stable, suspended matters are avoided, and the deep treatment effect can be further ensured.
Description
Technical field
The present invention relates to field of waste water treatment, refer to especially the method and apparatus of a kind of Coal Chemical Industry high-concentration waste water treatment.
Background technology
In global range, coal reserves is than more horn of plenty of oil and natural gas, and price is relatively low, and oil shortage phenomenon is day by day serious.Some rich coals are national as the U.S., Australia, India, Germany etc., all stepping up research or exploitation Coal Chemical Engineering Project.China also researchs and develops New Coal Chemical technique in recent years, sets up multiple Coal Chemical Industry demonstration projects, and builds up the direct liquefaction project of coal the biggest in the world.But for rich coal resources but the Coal Chemical Engineering Project in shortage of water resources area; in the situation that water loss and quantity of wastewater effluent are all large; be badly in need of practicable Coal Chemical Industry high-concentration waste water technology, to guarantee that Coal Chemical Engineering Project is in local economic society steady development and ecological environmental protection.
Burning hot developmental stage of Coal Chemical Industry technique at present, but the treatment process of coal chemical industrial waste water is relatively backward.Coal chemical industrial waste water is divided into DCL/Direct coal liquefaction liquefaction waste water and ICL for Indirect Coal Liquefaction liquefaction waste water according to the difference of technique.Coal Chemical Industry high-concentration waste water refers to through air lift, the water outlet after treatment of dephenolize device, mainly comprises sulfur-bearing, phenolic wastewater that the devices such as gelatin liquefaction, hydrofining, hydrocracking and sulphur recovery are discharged.Coal chemical industrial waste water contains exhibiting high surface promoting agent, has that colourity is large, emulsification degree is high, biodegradability is poor and the water surface easily forms the features such as a large amount of foams, belongs to unmanageable coal chemical industrial waste water.
MBR (Membrane Bio-Reactor, membrane bioreactor) be a kind of new type water treatment technology being combined with biological processing unit by film separation unit, application at sewage treatment area is comparatively general, there is the water suspension of going out and turbidity is low, effluent quality is good, sludge concentration is high, and floor space is little, controls, the advantage such as easy and simple to handle.But in the time that coal chemical industrial waste water is processed, need to be optimized MBR technology, improve MBR flux, reduce MBR film and pollute.
Summary of the invention
The present invention proposes the method and apparatus of a kind of Coal Chemical Industry high-concentration waste water treatment, has solved coal chemical industrial waste water in prior art and has processed while using MBR, and flux is low, and film pollutes high problem.
Technical scheme of the present invention is achieved in that
A kind of Coal Chemical Industry device for high concentration waste water treatment, comprising:
Oil-isolating device, for removing the suspension oil that waste water particle is larger;
Flocculation reaction device, can be flocculated for the waste water of removing described oil-isolating device discharge suspended substance colloid and the discrete particles that precipitation is fallen, and the partial suspended oil of not removing in described oil-isolating device, is communicated with described oil-isolating device;
Ultra micro air-floating apparatus, for removing the suspended substance of the waste water that described flocculation reaction device discharges, reduces subsequent disposal difficulty, is communicated with described flocculation reaction device;
Advanced oxidation device, the waste water difficult degradation pollutent of discharging for being oxidized described ultra micro air-floating apparatus, is communicated with described ultra micro air-floating apparatus;
Hydrolysis acidification device, for by macromolecular substance degraded, make the organism of difficult for biological degradation in waste water that described advanced oxidation device discharges further change the organism of readily biodegradable into, improve the biodegradability of waste water, be beneficial to follow-up aerobic treatment, be communicated with described advanced oxidation device;
Nitrogen rejection facility, for removing a large amount of ammonia nitrogens and the total nitrogen of the waste water that described hydrolysis acidification device discharges, is communicated with described hydrolysis acidification device;
Hypoxia device, for nitric nitrogen and nitrite nitrogen are reacted with organism under biological action, to remove not removed ammonia nitrogen and total nitrogen in the waste water that described nitrogen rejection facility discharges, is communicated with described nitrogen rejection facility;
Aerobic MBR device, carries out aerobic treatment for the waste water that described hypoxia device is discharged, and comprises some MBR films that are arranged in described aerobic MBR device, is communicated with described hypoxia device.
Further, Coal Chemical Industry device for high concentration waste water treatment of the present invention, also comprises:
The first fluidic device, for generation of micro-bubble, improves daf efficiency, is arranged in described ultra micro air-floating apparatus.
Preferably, described advanced oxidation device is any one or a few in senior micro-electrolytic oxidation apparatus, senior electric flocculation oxidation device, senior electrocatalysis oxidation apparatus, senior electrocatalysis oxidation apparatus, senior Fenton oxidation device, senior ozone-oxidizing device, senior photocatalytic oxidation device.
Preferably, described aerobic MBR device is submerged membrane bio-reactor or separate film biological reactor.
Preferably, described MBR film is any one in flat sheet membrane, hollow-fibre membrane, tubular membrane, spiral film.
Preferably, described MBR film is any one in microfiltration membrane, ultra-filtration membrane, nanofiltration membrane, reverse osmosis membrane.
Further, Coal Chemical Industry device for high concentration waste water treatment of the present invention, also comprises:
The second fluidic device, for aeration, and washes away described MBR film surface, reduces described MBR film and pollutes, and is arranged in described aerobic MBR device.
Further, Coal Chemical Industry device for high concentration waste water treatment of the present invention, also comprises:
Return-flow system, for the mud mixture in described aerobic MBR device is back to hypoxia device, is arranged in described aerobic MBR device, is communicated with described hypoxia device.
A method that uses above-mentioned Coal Chemical Industry device for high concentration waste water treatment to carry out water treatment, comprises the following steps:
(A) separate and remove the larger suspension oil of particle in waste water by oil removal technique;
(B) dosing flocculation is carried out in oil removal water outlet, and remove in described oil removal water outlet and can be flocculated suspended substance colloid and the discrete particles that precipitation is fallen, and the partial suspended oil of not removing in described oil removal water outlet;
(C) ultra micro air supporting is carried out in flocculation water outlet, remove in described flocculation water outlet the suspended substances such as remaining grease, fiber, algae, reduce subsequent disposal difficulty, in the time carrying out ultra micro air supporting, carry out jet processing, to produce even, small bubble, strengthen air flotation effect;
(D) advanced oxidation is carried out in ultra micro air supporting water outlet, removes difficult degradation pollutent in described ultra micro air supporting water outlet;
(E) the advanced oxidation water outlet acidifying that is hydrolyzed, macromolecular substance is degraded, make the organism of difficult for biological degradation in described advanced oxidation water outlet further change the organism of readily biodegradable into, improve the biodegradability of described advanced oxidation water outlet, be beneficial to follow-up aerobic treatment;
(F) denitrogenation processing is carried out in acidication water outlet, removes a large amount of ammonia nitrogens and total nitrogen in described acidication water outlet;
(G) anaerobic treatment is carried out in denitrogenation processing water outlet, and nitric nitrogen and nitrite nitrogen in described denitrogenation processing water outlet are reacted with organism under biological action, to remove not removed ammonia nitrogen and total nitrogen in described denitrogenation processing water outlet;
(H) aerobic MBR processing is carried out in anaerobic treatment water outlet, and the muddy water mixed solution in aerobic MBR treating processes is back to the anaerobic treatment stage, and aerobic MBR processes delivery turbidity and suspended substance approaches zero.
Beneficial effect of the present invention is:
1. the method and apparatus of Coal Chemical Industry high-concentration waste of the present invention water treatment, pre-treatment is perfect, reduces subsequent disposal difficulty, its biochemical treatment adopts the combination process of acidication-denitrogenation-anaerobic-aerobic MBR, first improve the biodegradability of waste water, then carry out denitrogenation, finally carry out aerobic treatment, guarantee biochemical treatment effect, pollute thereby be conducive to reduce film, cleaning frequency membrane is low, long service life, and MBR stable water outlet, no suspended substance, can guarantee advanced treatment effect.
2. the method and apparatus of Coal Chemical Industry high-concentration waste of the present invention water treatment, MBR film device can clean once for 3 months, or can within 6 months, clean once, even can within 12 months, clean once, can not only guarantee to produce water water quality high, and running maintenance is simple, system stability is good.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of Coal Chemical Industry device for high concentration waste water treatment of the present invention.
In figure:
1. oil-isolating device; 2. flocculation reaction device; 3. ultra micro air-floating apparatus; 4. advanced oxidation device; 5. hydrolysis acidification device; 6. nitrogen rejection facility; 7. hypoxia device; 8. aerobic MBR device; 9.MBR film.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, in the first embodiment of a kind of Coal Chemical Industry device for high concentration waste water treatment of the present invention, Coal Chemical Industry device for high concentration waste water treatment comprises:
Oil-isolating device 1, for removing the suspension oil that waste water particle is larger;
Flocculation reaction device 2, can be flocculated for removing the waste water that oil-isolating device 1 discharges suspended substance colloid and the discrete particles that precipitation is fallen, and the partial suspended oil of not removing in oil-isolating device 1, is communicated with oil-isolating device 1;
Ultra micro air-floating apparatus 3, for removing the suspended substance of the waste water that flocculation reaction device 2 discharges, reduces subsequent disposal difficulty, is communicated with flocculation reaction device 2;
Advanced oxidation device 4, the waste water difficult degradation pollutent of discharging for being oxidized ultra micro air-floating apparatus 3, is communicated with ultra micro air-floating apparatus 3;
Hydrolysis acidification device 5, for by macromolecular substance degraded, make the organism of difficult for biological degradation in waste water that advanced oxidation device 4 discharges further change the organism of readily biodegradable into, improve the biodegradability of waste water, be beneficial to follow-up aerobic treatment, be communicated with advanced oxidation device 4;
Nitrogen rejection facility 6, for removing a large amount of ammonia nitrogens and the total nitrogen of the waste water that hydrolysis acidification device 5 discharges, is communicated with hydrolysis acidification device 5;
Hypoxia device 7, for nitric nitrogen and nitrite nitrogen are reacted with organism under biological action, to remove not removed ammonia nitrogen and total nitrogen in the waste water that nitrogen rejection facility 6 discharges, is communicated with nitrogen rejection facility 6;
Aerobic MBR device 8, carries out aerobic treatment for the waste water that hypoxia device 7 is discharged, and comprises some MBR films 9 that are arranged in aerobic MBR device 8, is communicated with hypoxia device 7.
Wherein, nitrogen rejection facility 6 can be AO (Anacrobic and Oxic), SBR (Sequencing BatchReactor Activated Sludge Process), sequencing batch reactor denitrogenation, stripping denitrogenation etc., the present invention does not limit this.
In another embodiment of Coal Chemical Industry device for high concentration waste water treatment of the present invention, also comprise:
The first fluidic device, for generation of micro-bubble, improves daf efficiency, is arranged in ultra micro air-floating apparatus 3.
Wherein, preferably, described advanced oxidation device 4 is any one or a few in senior micro-electrolytic oxidation apparatus, senior electric flocculation oxidation device, senior electrocatalysis oxidation apparatus, senior electrocatalysis oxidation apparatus, senior Fenton oxidation device, senior ozone-oxidizing device, senior photocatalytic oxidation device.
Wherein, preferably, described aerobic MBR device 8 is submerged membrane bio-reactor or separate film biological reactor.
Wherein, preferably, described MBR film 9 is any one in flat sheet membrane, hollow-fibre membrane, tubular membrane, spiral film.
Wherein, preferably, described MBR film 9 is any one in microfiltration membrane, ultra-filtration membrane, nanofiltration membrane, reverse osmosis membrane.
Above-mentioned MBR film 9 is any one in flat sheet membrane, hollow-fibre membrane, tubular membrane, spiral film, is to divide according to the membrane structure type of MBR film 9; MBR film 9 is any one in microfiltration membrane, ultra-filtration membrane, nanofiltration membrane, reverse osmosis membrane, is to divide according to membrane pore size.
In another embodiment of Coal Chemical Industry device for high concentration waste water treatment of the present invention, also comprise:
The second fluidic device, for aeration, and washes away described MBR film 9 surfaces, reduces described MBR film 9 and pollutes, and is arranged in described aerobic MBR device 8.
In another embodiment of Coal Chemical Industry device for high concentration waste water treatment of the present invention, also comprise:
Return-flow system, for the mud mixture in aerobic MBR device 8 is back to hypoxia device 7, is arranged in aerobic MBR device 8, is communicated with hypoxia device 7.
The present invention also proposes a kind of method that uses above-mentioned Coal Chemical Industry device for high concentration waste water treatment to carry out water treatment, comprises the following steps:
(A) separate and remove the larger suspension oil of particle in waste water by oil removal technique;
(B) dosing flocculation is carried out in oil removal water outlet, and remove in oil removal water outlet and can be flocculated suspended substance colloid and the discrete particles that precipitation is fallen, and the partial suspended oil of not removing in oil removal water outlet;
(C) ultra micro air supporting is carried out in flocculation water outlet, removes in flocculation water outlet the suspended substances such as remaining grease, fiber, algae, reduces subsequent disposal difficulty, carries out jet processing in the time carrying out ultra micro air supporting, to produce even, small bubble, strengthens air flotation effect;
(D) advanced oxidation is carried out in ultra micro air supporting water outlet, removes difficult degradation pollutent in ultra micro air supporting water outlet;
(E) the advanced oxidation water outlet acidifying that is hydrolyzed, macromolecular substance is degraded, make the organism of difficult for biological degradation in advanced oxidation water outlet further change the organism of readily biodegradable into, improve the biodegradability of advanced oxidation water outlet, be beneficial to follow-up aerobic treatment;
(F) denitrogenation processing is carried out in acidication water outlet, removes a large amount of ammonia nitrogens and total nitrogen in acidication water outlet;
(G) anaerobic treatment is carried out in denitrogenation processing water outlet, and nitric nitrogen and nitrite nitrogen in denitrogenation processing water outlet are reacted with organism under biological action, to remove not removed ammonia nitrogen and total nitrogen in denitrogenation processing water outlet,
(H) aerobic MBR processing is carried out in anaerobic treatment water outlet, and the muddy water mixed solution in aerobic MBR treating processes is back to the anaerobic treatment stage, and aerobic MBR processes delivery turbidity and suspended substance approaches zero.
The method and apparatus of Coal Chemical Industry high-concentration waste of the present invention water treatment, has the following advantages:
1. the method and apparatus of Coal Chemical Industry high-concentration waste of the present invention water treatment, pre-treatment is perfect, reduces subsequent disposal difficulty, its biochemical treatment adopts the combination process of acidication-denitrogenation-anaerobic-aerobic MBR, first improve the biodegradability of waste water, then carry out denitrogenation, finally carry out aerobic treatment, guarantee biochemical treatment effect, pollute thereby be conducive to reduce film, cleaning frequency membrane is low, long service life, and MBR stable water outlet, no suspended substance, can guarantee advanced treatment effect.
2. the method and apparatus of Coal Chemical Industry high-concentration waste of the present invention water treatment, MBR film device can clean once for 3 months, or can within 6 months, clean once, even can within 12 months, clean once, can not only guarantee to produce water water quality high, and running maintenance is simple, system stability is good.
Below enumerate several examples effect of the present invention is described, but protection scope of the present invention is not limited only to this.
Embodiment 1:
Certain Coal Chemical Industry processing wastewater, adopts the method and apparatus of Coal Chemical Industry high-concentration waste of the present invention water treatment to process, and treatment capacity is 1m
3/ h, former water COD>=10000mg/L, ammonia nitrogen>=100mg/L, oils>=100mg/L, phenol>=100mg/L, 30 ℃ ~ 40 ° C of water temperature.Water outlet COD≤5mg/L, ammonia nitrogen≤0.5mg/L, oils≤1mg/L, phenol≤0.5mg/L, pH=6 ~ 9.Wherein aerobic MBR device 8 moves 6 months, and transmembrane pressure (TMP) rises to 15kPa by 2kPa, and the poor rising of mould is steady, and aerobic MBR device 8 continuously operation does not clean for 6 months.
Embodiment 2:
Certain coal liquefaction synthetic oil section waste water, adopts the method and apparatus of Coal Chemical Industry high-concentration waste of the present invention water treatment to process, and treatment capacity is 0.3m
3/ h, former water COD>=8000mg/L, ammonia nitrogen>=120mg/L, oils>=50mg/L, phenol>=100mg/L, 30 ° of C ~ 40 ° C of water temperature.Water outlet COD≤4mg/L, ammonia nitrogen≤0.5mg/L, oils≤1mg/L, phenol≤0.5mg/L, pH=6 ~ 9.Wherein aerobic MBR device 8 moves 6 months, and transmembrane pressure (TMP) rises to 15kPa by 2kPa, and the poor rising of mould is steady, and aerobic MBR device 8 continuously operation does not clean for 6 months.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a Coal Chemical Industry device for high concentration waste water treatment, is characterized in that, comprising:
Oil-isolating device (1), for removing the suspension oil that waste water particle is larger;
Flocculation reaction device (2), be used for removing the waste water that described oil-isolating device (1) discharges and can be flocculated suspended substance colloid and the discrete particles that precipitation is fallen, and the partial suspended oil of not removing in described oil-isolating device (1), be communicated with described oil-isolating device (1);
Ultra micro air-floating apparatus (3), the suspended substance of waste water of discharging for removing described flocculation reaction device (2), reduces subsequent disposal difficulty, is communicated with described flocculation reaction device (2);
Advanced oxidation device (4), the waste water difficult degradation pollutent of discharging for being oxidized described ultra micro air-floating apparatus (3), is communicated with described ultra micro air-floating apparatus (3);
Hydrolysis acidification device (5), for macromolecular substance is degraded, make the organism of difficult for biological degradation in waste water that described advanced oxidation device (4) discharges further change the organism of readily biodegradable into, improve the biodegradability of waste water, be beneficial to follow-up aerobic treatment, be communicated with described advanced oxidation device (4);
Nitrogen rejection facility (6), a large amount of ammonia nitrogens and the total nitrogen of waste water of discharging for removing described hydrolysis acidification device (5), is communicated with described hydrolysis acidification device (5);
Hypoxia device (7), be used for making nitric nitrogen and nitrite nitrogen to react with organism under biological action, with remove described nitrogen rejection facility (6) discharge waste water in not removed ammonia nitrogen and total nitrogen, be communicated with described nitrogen rejection facility (6);
Aerobic MBR device (8), carry out aerobic treatment for the waste water that described hypoxia device (7) is discharged, comprise some MBR films (9) that are arranged in described aerobic MBR device (8), be communicated with described hypoxia device (7).
2. Coal Chemical Industry device for high concentration waste water treatment according to claim 1, is characterized in that, also comprises:
The first fluidic device, for generation of micro-bubble, improves daf efficiency, is arranged in described ultra micro air-floating apparatus (3).
3. Coal Chemical Industry device for high concentration waste water treatment according to claim 2, it is characterized in that, described advanced oxidation device (4) is any one or a few in senior micro-electrolytic oxidation apparatus, senior electric flocculation oxidation device, senior electrocatalysis oxidation apparatus, senior electrocatalysis oxidation apparatus, senior Fenton oxidation device, senior ozone-oxidizing device, senior photocatalytic oxidation device.
4. Coal Chemical Industry device for high concentration waste water treatment according to claim 3, is characterized in that, described aerobic MBR device (8) is submerged membrane bio-reactor or separate film biological reactor.
5. Coal Chemical Industry device for high concentration waste water treatment according to claim 4, is characterized in that, described MBR film (9) is any one in flat sheet membrane, hollow-fibre membrane, tubular membrane, spiral film.
6. Coal Chemical Industry device for high concentration waste water treatment according to claim 4, is characterized in that, described MBR film (9) is any one in microfiltration membrane, ultra-filtration membrane, nanofiltration membrane, reverse osmosis membrane.
7. according to the Coal Chemical Industry device for high concentration waste water treatment described in claim 5 or 6, it is characterized in that, also comprise:
The second fluidic device, for aeration, and washes away described MBR film (9) surface, reduces described MBR film (9) and pollutes, and is arranged in described aerobic MBR device (8).
8. Coal Chemical Industry device for high concentration waste water treatment according to claim 7, is characterized in that, also comprises:
Return-flow system, for the mud mixture in described aerobic MBR device (8) is back to hypoxia device (7), is arranged in described aerobic MBR device (8), is communicated with described hypoxia device (7).
9. a method that uses Coal Chemical Industry device for high concentration waste water treatment as claimed in claim 1 to carry out water treatment, is characterized in that, comprises the following steps:
(A) separate and remove the larger suspension oil of particle in waste water by oil removal technique;
(B) dosing flocculation is carried out in oil removal water outlet, and remove in described oil removal water outlet and can be flocculated suspended substance colloid and the discrete particles that precipitation is fallen, and the partial suspended oil of not removing in described oil removal water outlet;
(C) ultra micro air supporting is carried out in flocculation water outlet, remove in described flocculation water outlet the suspended substances such as remaining grease, fiber, algae, reduce subsequent disposal difficulty, in the time carrying out ultra micro air supporting, carry out jet processing, to produce even, small bubble, strengthen air flotation effect;
(D) advanced oxidation is carried out in ultra micro air supporting water outlet, removes difficult degradation pollutent in described ultra micro air supporting water outlet;
(E) the advanced oxidation water outlet acidifying that is hydrolyzed, macromolecular substance is degraded, make the organism of difficult for biological degradation in described advanced oxidation water outlet further change the organism of readily biodegradable into, improve the biodegradability of described advanced oxidation water outlet, be beneficial to follow-up aerobic treatment;
(F) denitrogenation processing is carried out in acidication water outlet, removes a large amount of ammonia nitrogens and total nitrogen in described acidication water outlet;
(G) anaerobic treatment is carried out in denitrogenation processing water outlet, and nitric nitrogen and nitrite nitrogen in described denitrogenation processing water outlet are reacted with organism under biological action, to remove not removed ammonia nitrogen and total nitrogen in described denitrogenation processing water outlet;
(H) aerobic MBR processing is carried out in anaerobic treatment water outlet, and the muddy water mixed solution in aerobic MBR treating processes is back to the anaerobic treatment stage, and aerobic MBR processes delivery turbidity and suspended substance approaches zero.
Priority Applications (1)
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