CN215102479U - Fenton advanced oxidation device adopting MBBR carrier - Google Patents
Fenton advanced oxidation device adopting MBBR carrier Download PDFInfo
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- CN215102479U CN215102479U CN202121062487.8U CN202121062487U CN215102479U CN 215102479 U CN215102479 U CN 215102479U CN 202121062487 U CN202121062487 U CN 202121062487U CN 215102479 U CN215102479 U CN 215102479U
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Abstract
The utility model relates to an adopt device of fenton advanced oxidation of MBBR carrier belongs to the sewage treatment field, and it includes water inlet, FeSO4Addition tube, FeSO4Inlet, H2O2An inlet, a moving bed Fenton oxidation tank, a carrier cleaning tank, a carrier air stripping pipe, a water outlet screen, a water outlet PH adjusting channel and a blower, wherein, H is arranged2SO4Carrier cleaning H of carrier cleaning control valve2SO4Pipe and H2SO4The inlets of the carrier cleaning pipes are communicated; cleaning carrier tankThe outlet is communicated with the carrier outlet of the cleaning tank through a carrier water outlet pipe after cleaning; the inlet of the stripping carrier is communicated with the outlet of the stripping carrier through a carrier stripping pipe. The utility model discloses with traditional fenton advanced oxidation system and MBBR moving bed reactor fluidized bed coupling, constructed simple, the fenton moving bed advanced oxidation system of efficient waste water treatment.
Description
Technical Field
The utility model relates to an adopt device of fenton advanced oxidation of MBBR carrier belongs to the sewage treatment field.
Background
At present, the conventional Fenton (Fenton) process which is mature in the advanced oxidation process research of high-difficulty organic wastewater treatment in China is an advanced oxidation technology with strong oxidation capacity, but the technology has the defects of reaction in an acid environment and the like, so that the application range is greatly limited, and in a homogeneous Fenton reaction device, the problems of separation and recycling of a catalyst are solved. In addition, the chroma of Fenton effluent is increased due to the existence of iron plasma in the reaction process, and the pH value needs to be adjusted again after the reaction, so that the treatment cost is increased, a large amount of iron-containing sludge is generated, and the inconvenience is brought to the sewage treatment work by all the problems.
Although the fixed bed Fenton heterogeneous catalyst catalytic reactor can immobilize the catalyst and is easy to operate, the contact area of the immobilized catalyst and hydrogen peroxide is often too small, hardening sometimes occurs, wastewater is difficult to fully contact the catalyst, the mass transfer process is too slow, and the large-scale industrial application efficiency of the fixed bed Fenton heterogeneous catalyst catalytic reactor is low.
The main research direction of Fenton technology in recent years is a heterogeneous mixed reaction system, which is built by a heterogeneous catalytic oxidation system
The method is different from the conventional fixed bed catalytic reactor, namely a heterogeneous Fenton fluidized bed system. The principle of the Fenton fluidized bed reactor is that a 0.2-0.5mm quartz sand carrier is used as a crystal nucleus seed in a fluidized bed, wastewater and a medicament to be treated enter from the bottom of the fluidized bed and flow upwards, a backflow water bypass circulation is arranged outside the fluidized bed to ensure the rising flow velocity (40-60 m/h) of water in the fluidized bed, inorganic ions to be treated form stable crystals (FeOOH) on the surface of the quartz sand, and the crystals have a catalytic action, so that the dosage of a ferrous ion catalyst is reduced, and the sludge production is reduced.
The main facilities of the fluidized bed Fenton system comprise a fluidized bed reactor system, the supporting structure facilities before and after the fluidized bed process comprise a pH adjusting tank, a degassing tank, a sedimentation tank, a dosing system and the like, and the fluidized bed reactor system is provided with a water inlet pump, a water inlet distributor, a circulating water pump, supporting pipelines, instrument equipment and the like. The carrier adopted in the fluidized bed reactor has high specific gravity, and the carrier can be fluidized only under the condition of high internal circulation or external circulation water flow rate, so that how to develop an economic and effective fluidized carrier, reduce circulation energy consumption and improve a full mixing treatment method of a Fenton reaction system and wastewater becomes a research hotspot in the field of water treatment. The research of the Fenton fluidized bed focuses on (1) systematic research of characteristic comparison and optimal selection of the carrier; (2) seeking the optimal treatment condition and the optimal crystallization condition of the Fenton fluidized bed on the wastewater; (3) the catalytic performance of the loaded carrier is improved, the consumption of ferrous iron is further reduced to reduce the yield of iron mud, and the utilization efficiency of hydrogen peroxide is improved; (4) the Fenton fluidized bed technology is coupled with other technologies, so that the application range of the Fenton fluidized bed is expanded.
The biomembrane carrier adopted by the Moving Bed Biofilm Reactor (MBBR) is lighter than water, the main component is High Density Polyethylene (HDPE) or other plastic materials with strong corrosion resistance, and the suspension carrier has the advantages of specific gravity lower than that of water, large specific surface area, good hydrophilicity, long service life and the like; in addition, the MBBR suspended carrier is easy to fluidize, and can be fluidized under the condition that the gas-water ratio is less than 1: 1; in addition, the carrier is used as a carrier in a moving bed Fenton pool, on one hand, the iron oxide attached to the surface of the MBBR suspended carrier has heterogeneous catalysis effect on hydrogen peroxide to generate more OH degradation COD organic matters which are difficult to biodegrade, and on the other hand, the violent fluidization in a moving bed reaction system and the collision among the carriers can ensure that the mass transfer and the reaction efficiency between the oxide attached to the carrier and the mixed liquid have good promotion effect.
Disclosure of Invention
The utility model aims at overcoming the not enough of current fenton fluidized bed reaction system to current traditional fenton waste water treatment facility, providing an adopt the device of the fragrant advanced oxidation of MBBR carrier, with traditional fragrant advanced oxidation system and the coupling of MBBR moving bed reactor fluidization technique, constructed simple, efficient waste water treatment fragrant advanced oxidation system of moving bed.
The technical solution of the utility model is that:
a Fenton advanced oxidation device adopting MBBR carrier comprises a water inlet and FeSO4Addition tube, FeSO4Inlet, H2O2An inlet, a moving bed Fenton oxidation tank, a carrier cleaning tank, a carrier gas stripping pipe, a water outlet screen, a water outlet pH adjusting channel and an air blower, wherein the water inlet, the FeSO4Inlet and H2O2The inlets are respectively connected and communicated with the moving bed Fenton oxidation tank on the same water inlet side; is provided with H2SO4Carrier cleaning H of carrier cleaning control valve2SO4Pipe and H2SO4The inlets of the carrier cleaning pipes are communicated; a cleaning tank stirrer is arranged in the carrier cleaning tank; the outlet of the cleaning carrier tank is communicated with the outlet of the cleaning carrier tank through a cleaned carrier water outlet pipe; the gas stripping carrier inlet is communicated with the gas stripping carrier outlet through a carrier gas stripping pipe; the effluent pH adjusting channel is communicated with the effluent screen.
Furthermore, the moving bed Fenton oxidation pond is provided with a perforated pipe aeration system and a suspension carrier.
Further, the air blower is communicated with the perforated pipe aeration system through an aeration air supply pipe provided with an aeration control valve.
Further, the air blower is communicated with the air supply outlet of the air stripping through an air supply pipe provided with an air supply control valve.
Furthermore, a pH adjusting channel stirrer and an alkali liquor feeding port are arranged in the water outlet pH adjusting channel.
The utility model discloses following technological beneficial effect has:
1) the utility model discloses select the suspension carrier that hydrophilicity is strong as the carrier of load fenton catalysis iron oxide in the fenton oxidation pond of moving bed, the density ratio water of suspension carrier is lighter (0.96-0.98 g/cm) before adding3) Suspension carrier in moving bed FentonThe density of the oxidation pond is close to that of water after the oxidation pond is loaded with iron oxide; therefore, the suspended carrier in the Fenton oxidation pond of the moving bed needs a small amount of aeration (generally the ratio of air to water is less than 1: 1) from a perforated pipe aeration system arranged at the inner bottom of the Fenton oxidation pond to realize complete fluidization, and compared with the conventional Fenton fluidized bed with large specific gravity, the kinetic energy required by carrier fluidization is saved.
3) The perforated pipe aeration system can adopt plastic pipe materials such as ABS and the like which are low in price and strong in acid and alkali corrosion resistance, 4-8mm mesopore aeration holes can be uniformly arranged on the perforated pipe aeration system, and the perforated pipe aeration system is not easy to block; and the aeration rate has large upward driving force to the suspended carriers in the moving bed Fenton oxidation pond, and the oxidation mixed liquid and the suspended carriers in the moving bed Fenton oxidation pond can be fully mixed without any internal/external circulating system.
4) The maximum filling rate of the suspension carrier added into the moving bed Fenton oxidation pond can reach 70&, generally ranges from 30 to 60 percent, the specific surface area of the suspension carrier is large, the mass transfer contact area of the mixed solution and the suspension carrier is large, and the feeding amount of the carrier is flexible; the conditions of carrier hardening and short flow of reaction dead zones in the tank can be avoided due to violent fluidization, so that the efficiency of catalyzing advanced oxidation reaction is greatly improved.
5) Generally, as the catalytic reaction proceeds, when the loading amount of the iron oxidation catalyst loaded on the surface of the suspension carrier is too large, the fluidization and air mixture amount from the perforated pipe aeration system can be enough to blow the larger sediment loaded on the suspension carrier off the surface of the suspension carrier, and the suspension carrier can achieve the purpose of self-renewal in the moving bed Fenton oxidation pond.
6) When the sediment on the surface of the suspended carrier is too much to cause the self-cleaning update of the aeration system by the perforated pipe, the gas stripping cleaning system can be started by starting the gas stripping cleaning system, namely, the gas stripping cleaning system is started by opening a gas supply control valve arranged on a gas stripping gas supply pipe, the carrier cleaning tank is arranged at the top part in the moving bed Fenton oxidation pond to supply gas to the carrier gas stripping pipe, the suspended carrier can be moved to the carrier cleaning tank from the moving bed Fenton oxidation pond by the carrier gas stripping pipe, the suspended carrier and muddy water are sucked from a gas stripping carrier inlet, the gas stripping carrier inlet is prolonged to be below the water level of the moving bed Fenton oxidation pond, and the carrier and the moving bed are allowed to be automatically cleanedThe mixed liquid is sucked out or pumped out to a carrier cleaning tank; and simultaneously turn on the setting at H2SO4H on carrier cleaning tube2SO4Carrier cleaning control valve for supplying H to acid-washing suspension carrier2SO4The solution and the wash tank stirrer was turned on. The cleaned suspension carrier and muddy water mixed liquor flows back into the moving bed Fenton oxidation tank again through the cleaned carrier water outlet pipe at the lower part of the carrier cleaning tank and the carrier outlet of the cleaning tank, and meanwhile, the acidic mixed liquor with higher sludge content and relatively lower pH value also flows back into the moving bed Fenton oxidation tank to supplement the acidity required by advanced oxidation, so that the waste of any pickling solution is avoided; the utility model discloses both reached the purpose of wasing the suspension carrier, saved the trouble of extrapond manual cleaning, also need not extra pickling cost, reached the purpose that the carrier was washd to the inner loop mode.
7) In order to intercept the suspended carriers in the moving bed Fenton oxidation pond, the water outlet screen can be made of acid corrosion resistant stainless steel or glass fiber reinforced plastic or plastic materials, the water outlet screen for intercepting the suspended carriers in the pond is arranged at the inner water outlet end, and the reacted mud-water mixture can enter the water outlet pH adjusting channel through the water outlet screen.
Drawings
Fig. 1 is a schematic elevation structure of the present invention.
FIG. 2 is a schematic view of the plane structure of the present invention
Wherein: 1. water inlet, 2, FeSO4Addition tube, 3, FeSO4Inlet, 4, outlet of cleaning carrier tank, 5, H2O2Inlet, 6, H2SO4Carrier cleaning control valve, 7, Carrier cleaning H2SO4Tube, 8, H2SO4Carrier cleaning pipe inlet, 9, carrier cleaning tank, 10, cleaning tank stirrer, 11, gas stripping carrier outlet, 12, cleaning tank carrier outlet, 13, gas stripping carrier inlet, 14, blower, 15, aeration gas supply pipe, 16, gas stripping gas supply pipe, 17, aeration control valve, 18, gas supply control valve, 19, carrier gas stripping pipe, 20, gas stripping gas supply outlet, 21, water outlet screen, 22, water outlet pH adjusting channel, 23, pH adjusting channel stirrer, 24, suspended carrier25, a perforated pipe aeration system, 26, a moving bed Fenton oxidation tank, 27, a carrier water outlet pipe after cleaning, 28 and an alkali liquor feeding port.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2.
A Fenton advanced oxidation device adopting MBBR carriers comprises a water inlet 1 and FeSO4Addition tube 2, FeSO4Inlet 3, H2O2An inlet 5, a moving bed Fenton oxidation pond 26, a carrier cleaning tank 9, a carrier gas stripping pipe 19, a water outlet screen 21, a water outlet pH adjusting channel 22 and a blower 14, wherein the water inlet 1 and the FeSO are arranged in the carrier gas stripping pipe4Inlets 3 and H2O2The inlet 5 is respectively communicated with the moving bed Fenton oxidation tank 26 on the same water inlet side; is provided with H2SO4Carrier cleaning H of carrier cleaning control valve 62SO4Tubes 7 and H2SO4The carrier cleaning pipe inlet 8 is communicated; a cleaning tank stirrer 10 is arranged in the carrier cleaning tank 9; the cleaning carrier tank outlet 4 is communicated with the cleaning tank carrier outlet 12 through a cleaned carrier water outlet pipe 27; the gas stripping carrier inlet 13 is communicated with the gas stripping carrier outlet 11 through a carrier gas stripping pipe 19; the outlet pH adjusting channel 22 is communicated with the outlet screen 21.
Further, the moving bed fenton oxidation tank 26 is provided with a perforated pipe aeration system 25 and a suspension carrier 24.
Further, the blower 14 is communicated with the perforated pipe aeration system 25 through an aeration air supply pipe 15 provided with an aeration control valve 17.
Further, the blower 14 communicates with a gas supply air outlet 20 via a gas supply air pipe 16 provided with an air supply control valve 18.
Further, a pH adjusting channel stirrer 23 and an alkali liquor feeding port 28 are arranged in the outlet water pH adjusting channel 22.
The utility model discloses a work flow does:
1) the wastewater to be treated passes through a water inlet and FeSO4Passing the solution through FeSO4Inlet and H2O2Solution H2O2The inlets respectively flow into the moving bed Fenton oxidation pond at the same water inlet side.
2) In a moving bed Fenton oxidation pond, under the aeration and agitation of a perforated pipe aeration system, the mixed liquid and the suspended carrier are fully mixed and react.
3) When the sediment loaded on the surface of the suspended carrier is too much to cause the aeration system of the perforated pipe to be incapable of self-cleaning and updating, the gas stripping cleaning system can be started by starting the gas stripping cleaning system, namely, the gas supply control valve arranged on the gas stripping gas supply pipe is opened to start the gas stripping cleaning system to supply gas to the carrier gas stripping pipe, and the suspended carrier gas in the moving bed Fenton oxidation pond is lifted to the carrier cleaning tank arranged at the top of the moving bed Fenton oxidation pond; and simultaneously turn on the setting at H2SO4H on carrier cleaning tube2SO4Carrier cleaning control valve for supplying H to acid-washing suspension carrier2SO4Solution, and starting a cleaning tank stirrer; and the cleaned suspension carrier and muddy water mixed liquor flows back into the moving bed Fenton oxidation pond again through a cleaned carrier water outlet pipe at the lower part of the carrier cleaning tank and a carrier outlet of the cleaning tank, and meanwhile, the acidic mixed liquor with higher sludge content and relatively lower pH value also flows back into the moving bed Fenton oxidation pond to supplement the acidity required by advanced oxidation.
4) The mud-water mixture after the oxidation reaction flows through a water outlet screen at the water outlet end in the moving bed Fenton oxidation pond and flows into a water outlet pH adjusting channel; the pH value of the effluent mixed liquid is adjusted back to be neutral in the effluent pH adjusting channel by starting the pH adjusting channel stirrer and adding alkali liquor through an alkali liquor adding port.
Example one.
And (3) carrying out industrial wastewater treatment in 1200 m/day in a certain province, wherein the COD concentration of inlet water entering a Fenton advanced oxidation system of the MBBR carrier after the front-end secondary biochemical treatment is 210mg/L, BOD and 0.3mg/L respectively, and the ammonia nitrogen concentration is 5mg/L, TN and 20mg/L, TP. Adopt the utility model discloses technology, the packing rate of the cylinder type suspension carrier of interpolation is 40%, and the fragrant pond HRT of moving bed =4min, and the suspension carrier characteristics are: carrying out high-density polyethylene (HDPE) high-density polyethylene (0.96 g/cm) high-speed flowering on the purple-flowered material, wherein the diameter is 25mm, the height is 10mm, the porosity is larger than or equal to 90%, the stacking density is larger than or equal to 98kg/m, and the effective specific surface area is larger than or equal to 500 square meters/m; adopting a roller water outlet screen; after the facility is started, the BOD of the effluent is less than or equal to 5mg/L, the COD of the effluent is less than or equal to 50mg/L, the ammonia nitrogen is less than or equal to 4mg/L, the TN is less than or equal to 15mg/L, and the water quality of the effluent reaches the national standard.
It is to be understood that any equivalents, or obvious variations, which may be made by those skilled in the art in light of the teachings herein, are deemed to be within the scope of the present invention.
Claims (5)
1. A Fenton advanced oxidation device adopting MBBR carriers is characterized by comprising a water inlet and FeSO4Addition tube, FeSO4Inlet, H2O2An inlet, a moving bed Fenton oxidation tank, a carrier cleaning tank, a carrier gas stripping pipe, a water outlet screen, a water outlet pH adjusting channel and an air blower, wherein the water inlet, the FeSO4Inlet and H2O2The inlets are respectively connected and communicated with the moving bed Fenton oxidation tank on the same water inlet side; is provided with H2SO4Carrier cleaning H of carrier cleaning control valve2SO4Pipe and H2SO4The inlets of the carrier cleaning pipes are communicated; a cleaning tank stirrer is arranged in the carrier cleaning tank; the outlet of the cleaning carrier tank is communicated with the outlet of the cleaning carrier tank through a cleaned carrier water outlet pipe; the gas stripping carrier inlet is communicated with the gas stripping carrier outlet through a carrier gas stripping pipe; the effluent pH adjusting channel is communicated with the effluent screen.
2. An apparatus for Fenton's advanced oxidation with MBBR carriers according to claim 1, wherein said moving bed Fenton oxidation basin is provided with a perforated tube aeration system and suspended carriers.
3. An apparatus for Fenton's advanced oxidation using MBBR carriers according to claim 1, wherein said blower is connected to the perforated tube aeration system through an aeration gas supply tube provided with an aeration control valve.
4. An apparatus for Fenton's advanced oxidation using MBBR carriers according to claim 1, wherein said blower is connected to the gas supply outlet through a gas supply tube provided with a gas supply control valve.
5. The apparatus of Fenton's advanced oxidation with MBBR carriers of claim 1, wherein a pH adjusting channel stirrer and an alkali liquor feeding port are arranged in the outlet water pH adjusting channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121062487.8U CN215102479U (en) | 2021-05-18 | 2021-05-18 | Fenton advanced oxidation device adopting MBBR carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121062487.8U CN215102479U (en) | 2021-05-18 | 2021-05-18 | Fenton advanced oxidation device adopting MBBR carrier |
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| CN215102479U true CN215102479U (en) | 2021-12-10 |
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| CN202121062487.8U Active CN215102479U (en) | 2021-05-18 | 2021-05-18 | Fenton advanced oxidation device adopting MBBR carrier |
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- 2021-05-18 CN CN202121062487.8U patent/CN215102479U/en active Active
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