CN104445743A - Two-stage catalytic oxidation wastewater treatment system - Google Patents
Two-stage catalytic oxidation wastewater treatment system Download PDFInfo
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- CN104445743A CN104445743A CN201410769624.XA CN201410769624A CN104445743A CN 104445743 A CN104445743 A CN 104445743A CN 201410769624 A CN201410769624 A CN 201410769624A CN 104445743 A CN104445743 A CN 104445743A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
Abstract
The invention discloses a two-stage catalytic oxidation wastewater treatment system and belongs to the field of wastewater treatment. The two-stage catalytic oxidation wastewater treatment system is connected with a pH adjustment tank, an oxidation reactor, a neutralization tank, and a flocculation-sedimentation tank by virtue of inlet water pipelines, wherein the oxidation reactor comprises a first-stage oxidation reactor and a second-stage oxidation reactor, the water inlet of the first-stage oxidation reactor is connected with the water inlet of the second-stage oxidation reactor by virtue of a pipeline, the first-stage oxidation reactor is a homogeneous oxidation reactor and the second-stage oxidation reactor is a fixed bed oxidation reactor. Compare with the traditional homogeneous reaction and fluidized bed technology, by the two-stage catalytic oxidation wastewater treatment system, the reaction efficiency is increased, the chemical agent addition amount is significantly reduced, the effluent water quality can be significantly improved, the concentration of organic matters in the effluent water is decreased and the two-stage catalytic oxidation wastewater treatment system is applicable to deep treatment of wastewater and has broad practical application prospects.
Description
Technical field
The present invention discloses a kind of Waste Water Treatment, belongs to field of waste water treatment, specifically a kind of two-stage catalytic oxidized waste water treatment system.
Background technology
The development of the high pollution industries such as chemical industry, printing and dyeing, pharmaceutical industry; stern challenge is brought to environment protection; especially the discharge of bio-refractory waste water; the technological difficulties that wastewater treatment faces at present; traditional secondary waste water treatment system is difficult to reach purification object, causes hard-degraded substance to enter natural water and biosphere, badly influences the living environment of the mankind; tradition advanced oxidation generally adopts single-stage homogeneous phase or out-phase reactor, realizes complete hybrid reaction by aeration or stirring.In homogeneous reaction system, rate of mass transfer is high, and speed of reaction is very fast, but molysite consumption is larger, side reaction is more wayward, and it is also large that medicine consumes large sludge output, in engineering, therefore adopt out-phase reactor more, in out-phase reaction system, adopt fluidized-bed, its molysite dosage is low, but it is high to there is fluidisation power consumption more, the problems such as water inlet pollutent easily penetrates bed, and when causing water outlet Pollutant levels are not up to standard.
For the problems referred to above, the invention provides a kind of two-stage catalytic oxidized waste water treatment system, for used water difficult to degradate, traditional high-level oxidation technology basis is improved, be provided with dual-stage oxidation reactor, and improve oxidation reactor emphatically, have employed the mode that one-level homogeneous oxidizing reactors in series secondary fixed-bed oxidation reactor combines, the fixed bed heterocatalysis oxidation technology that secondary oxidation reactor utilizes, setting area layering on a fixed bed, utilize the ferric oxide composite crystal that the filler of packing layer adsorbs generation and hydrogen peroxide to carry out catalyzed reaction and produce free radical, and then mineralising organism, significantly lower molysite dosage, reduce iron mud output, the effect arranging transition metal in filler improves catalytic effect further, make up the deficiency of first order reaction molysite, the present invention is by conventional homogeneous high-level oxidation technology, heterocatalysis oxidation technology, heterocatalysis oxide reduction techniques and grading reactor technique are optimized combination, give full play to respective response feature advantage, improve reaction efficiency, significantly reduce added amount of chemical, facts have proved that two-stage catalytic oxidation is reacted and fluidized-bed class Technical comparing with conventional homogeneous, significantly can improve effluent quality, reduce outlet water organic substance concentration, be applicable to waste water treatment applications, there is wide actual application prospect.
Summary of the invention
The present invention is directed to deficiency and the problem of prior art existence, a kind of two-stage catalytic oxidized waste water treatment system is provided, molysite dosage can be reduced by this system, during process waste water, power consumption also reduces compared with homogeneous catalysis, and water inlet pollutant reaction belongs to pulling flow type oxidizing reaction, is not easy to penetrate bed, during water outlet, compliance rate significantly increases, use when native system is applicable to purifying liquid waste, be especially applicable to the needs meeting industrial waste water purifying, the concrete scheme that the present invention proposes is:
A kind of two-stage catalytic oxidized waste water treatment system, PH equalizing tank is connected by feedwater piping, oxidation reactor, neutralization tank, flocculation sedimentation tank, described oxidation reactor comprises stair oxidation reactor and secondary oxidation reactor, and the water outlet of stair oxidation reactor connects the water-in of secondary oxidation reactor by pipeline, stair oxidation reactor is homogeneous oxidizing reactor, and secondary oxidation reactor is fixed bed form oxidation reactor.Stair oxidation reactor and secondary oxidation reactor can adjust precedence according to sewage quality and processing requirements, or are made into the form of reaction tank.
Described stair oxidation reactor bottom is provided with inlet mouth, and inside arranges air aeration stirring system, and bottom is provided with water-in, and the lower sides that water-in is relative is provided with recirculation water entrance, and top is provided with water outlet.
The multifolded plate of surface irregularity injustice is vertically set in described stair oxidation reactor.
Described secondary oxidation reactor top is provided with water-in, the upper portion side wall relative with water-in is provided with backwash water outlet, bottom is provided with inlet mouth, backwash water, backwash gas entrance is provided with below inlet mouth, be provided with water outlet with backwash water, lower sides that backwash gas entrance is relative, water outlet is connected with the recirculation water entrance of stair oxidation reactor with water pump by pipeline.Can according to the regular backwash of the head loss of packing layer, backwash adopts air water backwash simultaneously form.
Establish packing layer in described secondary oxidation reactor, below packing layer, above inlet mouth, establish supporting layer; Below inlet mouth, above backwash water, backwash gas entrance and water outlet, filter plate is set.Supporting layer adopts coarse sand or gravel, can also be the porous plate of upper berth nylon wire or aperture by the porous plate contacting filler aspect and broaden gradually to supporting layer bottom surface.
The filler of described packing layer comprises inert support, transition metal, or inert support, transition-metals and their oxides; Filler mixed-stacking composition packing layer.
A method for two-stage catalytic sewage oxidation treatment, utilize a kind of two-stage catalytic oxidized waste water treatment system described in claim 6, waste water enters pH regulator pond by feedwater piping, and acid supplemented solution control ph enters stair oxidation reactor between 3 and 6 afterwards; Add molysite and hydrogen peroxide in stair oxidation reactor, add the mol ratio 1-6:1 of hydrogen peroxide and molysite, after question response 0.5-2 hour, enter secondary oxidation reactor; Continue to add hydrogen peroxide in secondary oxidation reactor, make to purify further in packing layer into water, the hydrogen peroxide added and the molysite mol ratio 1-4:1 initially added, entered neutralization tank after question response 0.5-2 hour, adds alkali and regulate pH at 7-8; Then treated water enters flocculation sedimentation tank by neutralization tank and carries out flocculation sediment, detects qualified rear water outlet.
In the filler of described secondary oxidation reactor, inert support adopts one or more combination in haydite, grain active carbon, quartz sand; Transition metal is one or more combination in iron, manganese, copper metal simple-substance; Or inert support adopts one or more combination in haydite, grain active carbon, quartz sand in filler; Transition metal be in iron, manganese, copper metal simple-substance one or more and with the one or more combination of its oxide compound.
In the filler of described secondary oxidation reactor, inert support and metal quality are than being 1-10:1.Metal quality is wherein known by summary of the invention on it is metallic element quality sum in metal simple-substance or metal simple-substance and oxide compound.
The water outlet of described secondary oxidation reactor returns to stair oxidation reactor by pipeline through water pump pressurization and proceeds circularly purifying.
Filter plate can adopt common slight drag filter plate or large resistance perforated pipe system, and aeration also can adopt perforated pipe or single-hole membrane aerator, and all reactors can adopt steel, macromolecular material or Steel Concrete to build.Medicament addition device, electrically and instrument etc. be conventional equipment.
Usefulness of the present invention is: the invention provides a kind of two-stage catalytic oxidized waste water treatment system, for used water difficult to degradate, traditional high-level oxidation technology basis is improved, is provided with dual-stage oxidation reactor, and improves oxidation reactor emphatically;
Have employed the mode that one-level homogeneous oxidizing reactors in series secondary fixed-bed oxidation reactor combines, stair oxidation reactor is homogeneous catalytic oxidation form, inside establishes coarse multifolded plate, not only can increase reaction contact area, also play the effect of water conservancy diversion, improve mass-transfer efficiency and reaction efficiency;
Secondary oxidation reactor is fixed bed form, utilize fixed bed heterocatalysis oxidation technology, the filler of packing layer adsorbs the ferric oxide composite crystal of generation and hydrogen peroxide carry out catalyzed reaction and produce free radical, and then mineralising organism, significantly lower molysite dosage, reduce iron mud output, in packing layer, filler arranges the effect of transition metal is improve catalytic effect further, make up the deficiency of first order reaction molysite, the supporting layer arranged under packing layer, while preventing inert support to run off, be conducive to uniform wash-down water;
The present invention is by conventional homogeneous high-level oxidation technology, heterocatalysis oxidation technology, heterocatalysis oxide reduction techniques and fractional order reaction technique are optimized combination, give full play to respective response feature advantage, improve reaction efficiency, significantly reduce added amount of chemical, facts have proved that two-stage catalytic oxidation is reacted and fluidized-bed class Technical comparing with conventional homogeneous, significantly can improve effluent quality, reduce outlet water organic substance concentration, be applicable to waste water treatment applications, there is wide actual application prospect.
Accompanying drawing explanation
Fig. 1 is stair oxidation reactor and secondary oxidation structure of reactor connection diagram;
Fig. 2 is a kind of schematic flow sheet of method of two-stage catalytic sewage oxidation treatment.
Reference numeral: 1 stair oxidation reactor water-in, 2 multifolded plates, 3 stair oxidation reactor water outlets, 4 stair oxidation reactor inlet mouths, 5 recirculation water entrances, 6 secondary oxidation reactor water-ins, 7 backwash water outlets, 8 secondary oxidation reactor inlet mouths, 9 packing layers, 10 supporting layers, 11 backwash water, backwash gas entrance, 12 filter plates, 13 secondary oxidation reactor water outlets.
Embodiment
Embodiment 1
A kind of two-stage catalytic oxidized waste water treatment system, PH equalizing tank is connected by feedwater piping, oxidation reactor, neutralization tank, flocculation sedimentation tank, oxidation reactor comprises stair oxidation reactor and secondary oxidation reactor, and the water outlet 1 of stair oxidation reactor connects the water-in 6 of secondary oxidation reactor by pipeline, stair oxidation reactor is homogeneous oxidizing reactor, and secondary oxidation reactor is fixed bed form oxidation reactor;
Stair oxidation reactor bottom is provided with inlet mouth 4, and bottom is provided with water-in 1, and top is provided with water outlet 3, and water outlet 3 connects go back to the bottom of stair oxidation reactor by pipeline, is set to recirculation water entrance 5; Secondary oxidation reactor top is provided with water-in 6, the upper portion side wall relative with water-in 6 is provided with backwash water and exports 7, bottom is provided with inlet mouth 8, backwash water, backwash gas entrance 11 is provided with below inlet mouth 8, be provided with water outlet 13 with backwash water, lower sides that backwash gas entrance 11 is relative, water outlet 13 is connected with backwash water, backwash gas entrance 11 by pipeline.
Embodiment 2
A kind of two-stage catalytic oxidized waste water treatment system, PH equalizing tank is connected by feedwater piping, oxidation reactor, neutralization tank, flocculation sedimentation tank, oxidation reactor comprises stair oxidation reactor and secondary oxidation reactor, and the water outlet 1 of stair oxidation reactor connects the water-in 6 of secondary oxidation reactor by pipeline, stair oxidation reactor is homogeneous oxidizing reactor, and secondary oxidation reactor is fixed bed form oxidation reactor;
Stair oxidation reactor bottom is provided with inlet mouth 4, and bottom is provided with water-in 1, and top is provided with water outlet 3, and water outlet 3 connects go back to the bottom of stair oxidation reactor by pipeline, is set to recirculation water entrance 5; Secondary oxidation reactor top is provided with water-in 6, the upper portion side wall relative with water-in 6 is provided with backwash water and exports 7, bottom is provided with inlet mouth 8, backwash water, backwash gas entrance 11 is provided with below inlet mouth 8, water outlet 13 is provided with backwash water, lower sides that backwash gas entrance 11 is relative, water outlet 13 is connected with the recirculation water entrance 5 of stair oxidation reactor with water pump by pipeline, packing layer 9 is established in secondary oxidation reactor, below packing layer 9, establish supporting layer 10 above inlet mouth 8, supporting layer 10 comprises the porous plate of upper berth nylon wire.
Adopt the two-stage catalytic oxidized waste water treatment system process straw pulp paper waste of embodiment 2, water yield 2000M
3/ h, after biochemical treatment, COD concentration is at 250-300mg/L, first water inlet enters pH regulator pond, adding dilute sulphuric acid regulates pH to be 3-4, enter stair oxidation reactor, calculate with flooding quantity and add ferrous sulfate 560mg/L, hydrogen peroxide 100 mg/L, in stair oxidation reactor, air is entered by bottom, intake because feed pressure upwards sprays, enter after Organic substance in water and hydrogen peroxide and molysite react, aerated reaction 1.5 hours, secondary oxidation reactor is entered again by water outlet 3, the water inlet of secondary oxidation reactor is flowed into downwards through packing layer 9 by stair oxidation reactor, second reactor adds hydrogen peroxide 70 mg/L, aerated reaction 1 hour, flowed out by water outlet 13 downwards through supporting layer 10, enter neutralization tank and add sodium hydroxide adjustment pH=7-8, finally enter flocculation sedimentation tank precipitate and separate, during water outlet, COD is down to 40 below mg/L.
In secondary oxidation reactor, packing layer 9 is made up of inert support and transition metal and suboxide mixed-stacking thereof, and inert support adopts haydite, quartz sand, and transition metal adopts iron, manganese and iron protoxide, and wherein inert support and metal quality are than being 1-3:1.
Embodiment 3
A kind of two-stage catalytic oxidized waste water treatment system, PH equalizing tank is connected by feedwater piping, oxidation reactor, neutralization tank, flocculation sedimentation tank, oxidation reactor comprises stair oxidation reactor and secondary oxidation reactor, and the water outlet 1 of stair oxidation reactor connects the water-in 6 of secondary oxidation reactor by pipeline, stair oxidation reactor is homogeneous oxidizing reactor, and secondary oxidation reactor is fixed bed form oxidation reactor;
Stair oxidation reactor bottom is provided with inlet mouth 4, and bottom is provided with water-in 1, and top is provided with water outlet 3, and water outlet 3 connects go back to the bottom of stair oxidation reactor by pipeline, is set to recirculation water entrance 5, secondary oxidation reactor top is provided with water-in 6, the upper portion side wall relative with water-in 6 is provided with backwash water and exports 7, bottom is provided with inlet mouth 8, backwash water is provided with below inlet mouth 8, backwash gas entrance 11, with backwash water, the lower sides that backwash gas entrance 11 is relative is provided with water outlet 13, water outlet 13 is connected with the recirculation water entrance 5 of stair oxidation reactor with water pump by pipeline, packing layer 9 is established in secondary oxidation reactor, below packing layer 9, supporting layer 10 is established above inlet mouth 8, supporting layer 10 comprises aperture by the porous plate contacting filler aspect and broaden gradually to supporting layer bottom surface, in secondary oxidation reactor below inlet mouth 8, backwash water, above backwash gas entrance 11 and water outlet 13, filter plate 12 is set.
Adopt the two-stage catalytic oxidized waste water treatment system process industry park wastewater from chemical industry of embodiment 3, water yield 1000M
3/ h, after biochemical treatment, COD concentration is at 150mg/L, first water inlet enters pH regulator pond, adding dilute sulphuric acid regulates pH to be 4-5, enter stair oxidation reactor, calculate with flooding quantity and add ferrous sulfate 250 mg/L, hydrogen peroxide 100 mg/L, in stair oxidation reactor, air is entered by bottom, intake because feed pressure upwards sprays, enter after Organic substance in water and hydrogen peroxide and molysite react, aerated reaction 1 hour, secondary oxidation reactor is entered again by water outlet 3, packing layer 9 was sprayed in the water inlet being flowed into secondary oxidation reactor by stair oxidation reactor downwards, secondary oxidation reactor adds hydrogen peroxide 70 mg/L, aerated reaction half an hour, being flowed out by water outlet 13 downwards through supporting layer 10 refluxes into stair oxidation reactor again, proceed purifying treatment 1 hour, neutralization tank is entered again through secondary oxidation reactor water outlet, add sodium hydroxide in neutralization tank and regulate pH=7-8, finally enter flocculation sedimentation tank precipitate and separate, during water outlet, COD is down to 50 below mg/L.
In secondary oxidation reactor, packing layer 9 is made up of inert support and transition metal mixed-stacking, and inert support adopts haydite, grain active carbon, quartz sand, and transition metal adopts iron, copper; Wherein inert support and metal quality are than being 3-5:1.
Adopt the two-stage catalytic oxidized waste water treatment system process industry park wastewater from chemical industry of embodiment 3, water yield 1000M
3/ h, after biochemical treatment, COD concentration is at 100mg/L, first water inlet enters pH regulator pond, adding dilute sulphuric acid regulates pH to be 3-5, enter stair oxidation reactor, calculate with flooding quantity and add ferrous sulfate 150 mg/L, hydrogen peroxide 35 mg/L, in stair oxidation reactor, air is entered by bottom, intake because feed pressure upwards sprays, enter after Organic substance in water and hydrogen peroxide and molysite react, flowing out from water outlet 3 is back to stair oxidation reactor again, aerated reaction 2 hours, secondary oxidation reactor is entered again by water outlet 3, packing layer 9 was sprayed in the water inlet being flowed into secondary oxidation reactor by stair oxidation reactor downwards, second reactor adds hydrogen peroxide 65mg/L, react 2 hours, being flowed out by water outlet 13 downwards through supporting layer 10 refluxes into stair oxidation reactor again, proceed purifying treatment 1 hour, neutralization tank is entered again through secondary oxidation reactor water outlet, add sodium hydroxide in neutralization tank and regulate pH=7-8, finally enter flocculation sedimentation tank precipitate and separate, during water outlet, COD is down to 50 below mg/L.
In secondary oxidation reactor, packing layer 9 is made up of inert support and transition metal and suboxide mixed-stacking thereof, and inert support adopts grain active carbon, quartz sand according to weight ratio, and transition metal adopts manganese, copper and Manganse Dioxide; Wherein inert support and metal quality are than being 6-10:1.
Claims (10)
1. a two-stage catalytic oxidized waste water treatment system, PH equalizing tank is connected by feedwater piping, oxidation reactor, neutralization tank, flocculation sedimentation tank, is characterized in that described oxidation reactor comprises stair oxidation reactor and secondary oxidation reactor, and the water outlet of stair oxidation reactor connects the water-in of secondary oxidation reactor by pipeline, stair oxidation reactor is homogeneous oxidizing reactor, and secondary oxidation reactor is fixed bed form oxidation reactor.
2. a kind of two-stage catalytic oxidized waste water treatment system according to claim 1, it is characterized in that described stair oxidation reactor bottom is provided with inlet mouth, inside arranges air aeration stirring system, bottom is provided with water-in, the lower sides that water-in is relative is provided with recirculation water entrance, and top is provided with water outlet.
3. a kind of two-stage catalytic oxidized waste water treatment system according to claim 1 and 2, is characterized in that the multifolded plate vertically arranging surface irregularity injustice in described stair oxidation reactor.
4. a kind of two-stage catalytic oxidized waste water treatment system according to claim 3, it is characterized in that secondary oxidation reactor top is provided with water-in, the upper portion side wall relative with water-in is provided with backwash water outlet, bottom is provided with inlet mouth, backwash water, backwash gas entrance is provided with below inlet mouth, be provided with water outlet with backwash water, lower sides that backwash gas entrance is relative, water outlet is connected with the recirculation water entrance of stair oxidation reactor with water pump by pipeline.
5. a kind of two-stage catalytic oxidized waste water treatment system according to claim 4, is characterized in that establishing packing layer in described secondary oxidation reactor, below packing layer, establishes supporting layer above inlet mouth; Below inlet mouth, above backwash water, backwash gas entrance and water outlet, filter plate is set.
6. a kind of two-stage catalytic oxidized waste water treatment system according to claim 4 or 5, is characterized in that the filler of described packing layer comprises inert support, transition metal, or inert support, transition-metals and their oxides; Filler mixed-stacking composition packing layer.
7. the method for a two-stage catalytic sewage oxidation treatment, utilize a kind of two-stage catalytic oxidized waste water treatment system described in claim 6, it is characterized in that waste water enters pH regulator pond by feedwater piping, acid supplemented solution control ph enters stair oxidation reactor between 3 and 6 afterwards; Add molysite and hydrogen peroxide in stair oxidation reactor, add the mol ratio 1-6:1 of hydrogen peroxide and molysite, after question response 0.5-2 hour, enter secondary oxidation reactor; Continue to add hydrogen peroxide in secondary oxidation reactor, make to purify further in packing layer into water, the hydrogen peroxide added and the molysite mol ratio 1-4:1 initially added, entered neutralization tank after question response 0.5-2 hour, adds alkali and regulate pH at 7-8; Then processed water enters flocculation sedimentation tank by neutralization tank and carries out flocculation sediment, detects qualified rear water outlet.
8. the method for a kind of two-stage catalytic sewage oxidation treatment according to claim 7, is characterized in that in the filler of described secondary oxidation reactor, inert support adopts one or more combination in haydite, grain active carbon, quartz sand; Transition metal is one or more combination in iron, manganese, copper metal simple-substance; Or inert support adopts one or more combination in haydite, grain active carbon, quartz sand in filler; Transition metal is the one or more combination of one or more combination and oxide compound thereof in iron, manganese, copper metal simple-substance.
9. the method for a kind of two-stage catalytic sewage oxidation treatment according to claim 7 or 8, is characterized in that in the filler of described secondary oxidation reactor, inert support and metal quality are than being 1-10:1.
10. the method for a kind of two-stage catalytic sewage oxidation treatment according to claim 9, is characterized in that the water outlet of described secondary oxidation reactor returns to stair oxidation reactor by pipeline through water pump pressurization and proceeds circularly purifying.
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| CN105018744A (en) * | 2015-07-27 | 2015-11-04 | 昆明理工大学 | Method for removing organic matter in zinc hydrometallurgy raffinate |
| CN105502759A (en) * | 2015-12-14 | 2016-04-20 | 武汉钢铁(集团)公司 | Cold rolling electrotinning wastewater treatment technology |
| CN106145461A (en) * | 2015-04-11 | 2016-11-23 | 上虞华杰环保有限公司 | A kind of wet oxidation catalysis and Inner electrolysis reaction unit equipment |
| CN106186276A (en) * | 2016-09-05 | 2016-12-07 | 苏州清然环保科技有限公司 | A kind of Fenton oxidation device |
| CN106800342A (en) * | 2015-11-25 | 2017-06-06 | 湖南恒光化工有限公司 | A kind of sewage-treatment plant |
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| CN108585164A (en) * | 2018-03-23 | 2018-09-28 | 华夏碧水环保科技有限公司 | A kind of processing method of Fenton catalyst oxidation reactor and its highly difficult industrial wastewater |
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