CN104478066B - Outer circulation sewage disposal catalytic ozonation reactor and sewage water treatment method - Google Patents
Outer circulation sewage disposal catalytic ozonation reactor and sewage water treatment method Download PDFInfo
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- CN104478066B CN104478066B CN201410775121.3A CN201410775121A CN104478066B CN 104478066 B CN104478066 B CN 104478066B CN 201410775121 A CN201410775121 A CN 201410775121A CN 104478066 B CN104478066 B CN 104478066B
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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
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
Abstract
The invention discloses a kind of outer circulation sewage disposal catalytic ozonation reactor, reactor is provided with offgas duct and sewage outlet pipe, it is equipped with return duct in offgas duct and outlet pipe, and tail gas return duct and sewage backflow pipe are respectively communicated to gas phase import and the aqueous phase import of water sprayer, water sprayer exports by pipeline connection to reactor.The invention also discloses a kind of sewage water treatment method, with described outer circulation sewage disposal catalytic ozonation reactor, the sewage processed and tail gas are refluxed, make full use of remaining ozone in the ozone and tail gas dissolved in sewage and again carry out catalytic oxidation, improve the sewage disposal degree of depth, increase substantially ozone utilization rate, improve the sewage disposal degree of depth.
Description
Technical field
The invention belongs to technical field of sewage, relate to a kind of sewage disposal catalytic ozonation reactor, especially
The catalytic ozonation reactor of sewage and circulation of tail gas, is specially a kind of outer circulation sewage disposal catalytic ozonation reactor
And sewage water treatment method.
Background technology
In order to tackle the ecological environment gone from bad to worse, country constantly promulgates the strictest environment protectment protection, to sewage
The requirement processed also constantly is improving.In the case of, water scarcity seriously polluted at current water, energy-saving and emission-reduction, sewage reach
Mark discharge and reusing sewage become an important process of manufacturing enterprise.The most traditional sewage disposal technology has been difficult to full
The sewage drainage standard of foot increasingly stringent and the requirement of reusing sewage, thus propose the technical need of advanced treatment of wastewater.
High-level oxidation technology is an emerging water technology, can produce the strong oxygen such as hydroxyl radical free radical in course of reaction
Change free group, substantially increase oxidability, effectively degrade the pollutant in water.As one of high-level oxidation technology,
Ozone oxidation or catalytic ozonation concept have obtained developing faster after last century, the nineties is suggested, no matter ozone oxygen
Change or catalytic ozonation, all have industrialization case running.
Catalytic ozonation currently mainly uses the mode of perforated pipe or micro-pore aeration to be passed through in water by ozone, due to ozone
The bubble formed in sewage is relatively big, and dissolution rate is relatively low, thus causes ozone utilization rate low, containing ozone content in outer last person's gas
More.
For improving ozone utilization rate and sewage treating efficiency, the mode of current commonly used catalytic ozonation carries out dirt
Water processes.It is pre-that catalytic ozonation has been successfully applied to advanced treatment of wastewater, reusing sewage and high concentration difficulty biochemical sewage
The aspects such as process, its ozone utilization rate and the more independent ozone oxidation of sewage treating efficiency improve a lot.But ozone is urged at present
The research changing oxidation is concentrated mainly on catalyst research and development aspect, have developed different carriers and the catalysis of load different activities component
Agent, as with activated carbon, activated alumina or molecular sieve etc. as carrier, loads MnO, CuO, ZnO, TiO2、CeO2、SeO2Deng up to
More than ten plant active component, carry out the catalyst that various combination is developed；The catalyst developed is different, and treatment effect is respectively arranged with difference
Different.Research Emphasis is placed on exploitation effective catalyst to improve ozone utilization rate and sewage treating efficiency by current each research institution
On, and seldom have by research, design and develop high efficiency reactor and improve ozone utilization rate and sewage treating efficiency.Grind at present
The reactor studied carefully and apply is mainly two kinds, one be sewage ozone co-flow, by reactor bottom from bottom to top by anti-
Answer device beds, catalytic oxidation occurs；Another kind be sewage ozone reverse flow, sewage from top to bottom, ozone from
Lower and upper by reactor bed, generation catalytic oxidation.
The subject matter that existing catalytic ozonation reactor exists has:
(1) after sewage reaction, in tail gas, ozone undissolved, reaction is unrecovered, discharges, make after ozone decomposed device processes
Become the waste of ozone；
(2) the dissolubility ozone having not enough time to reaction in sewage is expelled directly out, if follow-up sewage disposal is connected to biology
Processing unit, also needs that sewage carries out aeration etc. and processes, by ozone stripping, on the one hand add treatment process, on the other hand make
Become the waste of ozone；
(3) sewage time of staying in reactor is generally 0.5～1.0 hour, part difficult oxidation material future in sewage
And oxidized be just discharged, reaction depth is inadequate, causes sewage treating efficiency the highest.
A kind of oil refining sewerage catalytic ozonation advanced treatment apparatus disclosed in Chinese patent literature CN203625104U, be
Use two ozone catalytic tower series connection, use high pressure, second ozone by first catalytic ozonation tower of waste water processes
Catalysis oxidizing tower uses normal pressure, and its principle is by first high-pressure ozone catalysis oxidizing tower, utilizes high pressure, high-concentrated ozone first
Macromolecule contaminant is degraded to small molecule contaminants, then with low pressure, low concentration ozone degradation of small molecular pollutant.Its essence is real
Border is by using two catalytic ozonation towers to improve ozone with the waste water time to improve pollutant catalysis degree of oxidation,
And initial oxidation is to be completed by high pressure, high-concentrated ozone, i.e. improve ozone and sewage or the ratio of pollutant, and the most normal
Pressure catalytic ozonation tower in tail gas in ozone content be to be determined by the process conditions of normal pressure catalytic ozonation tower, therefore this
The mode of kind can improve the degree for the treatment of of dirty water pollutant, but can not really reduce ozone concentration i.e. ozone discharge in tail gas
Amount, i.e. ozone utilization rate the most really improves.Simultaneously as using two particularly first, towers is high-pressure tower, equipment investment
It is multiplied, and is difficult to operation.
Disclosed in Chinese patent literature CN203625105U, a kind of oil refining sewerage catalytic ozonation pretreatment unit is also
Using two towers i.e. to pre-oxidize tower and catalysis oxidizing tower series connection, time its sewage different from CN203625105U is adverse current with ozone
Contact, is included in tower adverse current, and be the most also adverse current, i.e. sewage from pre-oxidation tower to catalysis oxidizing tower, and
Ozone is to pre-oxidation tower from catalysis oxidizing tower.Its deficiency remains and adds equipment investment and operation easier, and from catalysis
At pre-oxidation tower internal oxidition declines after in oxidizing tower tail gas out, ozone concentration (content) reduces, therefore its pre-oxidation tower
Inefficient, by increase this tower improve ozone utilization rate invest with it compared with the most do not preponderate.
Summary of the invention
In sum, present invention aims to the problem that above-mentioned existing catalyst oxidation reactor exists, it is provided that one
Kind of sewage tail gas outer circulation catalytic ozonation reactor, raw for advanced treating, reusing sewage and the high concentration difficulty of sewage
Change the fields such as sewage disinfection treatment, than traditional catalytic ozonation reactor, increase substantially ozone utilization rate, increase reaction
The degree of depth, improves sewage treating efficiency.
The present invention is achieved in that
A kind of outer circulation sewage disposal catalytic ozonation reactor, reactor is provided with offgas duct and sewage outlet pipe,
It is characterized in that: in offgas duct and outlet pipe, be equipped with return duct, and tail gas return duct and sewage backflow pipe are respectively communicated to water
The gas phase import of emitter and aqueous phase import, water sprayer exports by pipeline connection to reactor.
Further, being provided with Hui Liushui gas distributor in reactor, the outlet of described water sprayer is by pipeline connection extremely
Hui Liushui gas distributor；Being provided with tail gas control valve between offgas duct outlet and tail gas return duct, tail gas return duct is provided with back
Stream tail gas control valve；Being provided with sewage control valve between outlet pipe outlet and sewage backflow pipe, sewage backflow pipe is provided with backflow
Sewage control valve and recirculation water booster pump.
Further, inside reactor from bottom up be disposed with ozone distributor, inlet distribution device, described time
Liu Shui gas distributor, catalyst support grid, catalyst bed course and beds, reactor head is provided with exhaust collection
Cover, exhaust collection cover top connects described offgas duct, is communicated with ozone decomposed device between offgas duct outlet and tail gas control valve；
Ozone distributor connection ozone air inlet pipe, inlet distribution device connection water inlet pipe, water inlet pipe is provided with into water booster pump.
Further, backwash water inlet pipe and backwash air inlet it are additionally provided with below catalyst in reactor supportive grid
Pipe, is positioned at the position above beds on reactor and is provided with backwash drain pipe.
Further, the exhaust collection cover at described reactor is provided with a circle overflow with reactor shell convergence part
Weir, downflow weir is connected with described outlet pipe.
A kind of sewage water treatment method utilizing above-mentioned outer circulation sewage disposal catalytic ozonation reactor for treatment sewage, its
It is characterised by comprising the following steps:
(1) treatment sewage is evenly distributed in outer circulation sewage disposal ozone by water inlet distributor after water inlet pipe
Catalyst oxidation reactor bottom, ozone is evenly distributed in reactor bottom by ozone distributor after ozone air inlet pipe,
Flow through beds on treatment sewage and ozone, catalytic ozonation reaction occurs in beds；
(2) sewage overflow processed through step (1) enters outlet pipe, and a sewage part is discharged to through outlet pipe outlet
Outside, another part enters water sprayer through sewage backflow pipe；The tail gas produced in step (1) course of reaction is through exhaust collection cover
Entering offgas duct after collection, a tail gas part is expelled to outside, another part tail after ozone decomposed device on tail gas pipeline processes
Gas enters water sprayer through tail gas return duct；
(3) sewage refluxed and tail gas are mixed to form air-water mixture in water sprayer and are back to reactor by pipeline
Catalytic oxidation is again participated in interior Hui Liushui gas distributor.
In sewage water treatment method of the present invention, also comprise the steps:
(4), after catalytic oxidation runs 6～7 days, backwash air inlet pipe is first passed through in catalytic ozonation reactor
Below beds, air inlet carries out independent air purge to beds, passes through backwash water inlet pipe while not stopping air purge again
Water inlet beds carried out gas water associating backwash, finally stop air inlet, intake to catalyst bed by backwash water inlet pipe
Layer is individually washed；
(5) backwash water produced by step (4) being discharged by backwash drain pipe, backwash waste gas is discharged by offgas duct.
In sewage water treatment method of the present invention, in step (4), the independent air purge time is 3～10 minutes, air purge intensity
It is 12～25L/ (m2·s)；Gas the water associating backwash time be 3～5 minutes, air purge intensity 10～15L/ (m2S), washing intensity
4～6L/ (m2·s)；Individually washing time is 3～10 minutes, washes intensity 8～16L/ (m2·s)。
In sewage water treatment method of the present invention, reactor tail gas reflux ratio is 200～400%: sewage backflow ratio is
200～400%.
In sewage water treatment method of the present invention, the effective hydraulic detention time of reactor is 0.5～1.0 hour.
Beneficial effects of the present invention should for providing a kind of outer circulation sewage disposal catalytic ozonation reactor and utilization
Reactor carries out the method for sewage disposal, the sewage processed and tail gas is refluxed, make full use of the ozone dissolved in sewage and
In tail gas, remaining ozone carries out catalytic oxidation again, improves the sewage disposal degree of depth, increases substantially ozone utilization rate, energy
Enough meet tail gas qualified discharge, environmental protection, economize on resources；Beds is easy to clean, extends catalyst service life, and
And fast cleaning removes oil removal in time, improves catalytic oxidation efficiency；Device structure is simple and convenient to operate, utilization rate
Height, invests low.
Accompanying drawing explanation
Fig. 1 is the outer circulation sewage disposal catalytic ozonation structure of reactor schematic diagram that the present invention provides；
In figure:
1. reactor；2. ozone distributor；3. water inlet distributor；4. beds；5. ozone air inlet pipe；6. water inlet
Pipe；7. water inlet booster pump；8. catalyst support grid；9. catalyst bed course；10. exhaust collection cover；11. offgas duct；12. overflows
Weir；13. outlet pipes；14. tail gas return ducts；15. sewage backflow pipes；16. water sprayers；17. Hui Liushui gas distributors；18. tail gas
Bank of tubes exports；19. tail gas control valves；20. ozone decomposed devices；21. backflow tail gas control valves；22. outlet pipe outlets；23. is dirty
Water control valve；24. backflow sewage control valves；25. recirculation water booster pumps；26. backwash water inlet pipes；27. backwash air inlet pipe；
28. backwash drain pipies；29. backwash air inlets；30. backwash water inlets.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawings and detailed description of the invention
The present invention is described in further detail.
As shown in Figure 1, a kind of outer circulation sewage disposal catalytic ozonation reactor, reactor 1 shape of cross section is
Circle or rectangle, including ozone distributor 2, water inlet distributor 3, beds 4, internal from bottom up at reactor 1
Setting gradually described ozone distributor 2, water inlet distributor 3 and beds 4, ozone distributor 2 connects ozone air inlet pipe 5,
Water inlet distributor 3 connects water inlet pipe 6, and water inlet pipe 6 is provided with into water booster pump 7；It is provided with catalyst pad below beds 4
Layer 9, is provided with catalyst support grid 8 below catalyst bed course 9；Reactor 1 top is provided with exhaust collection cover 10, exhaust collection cover
10 and the cylinder convergence part of reactor be provided with a circle downflow weir 12, be positioned at above beds 4 and be positioned at exhaust collection cover
Below 10, downflow weir 12 connects outlet pipe 13.
Exhaust collection cover 10 top connection offgas duct 11, offgas duct 11 and outlet pipe 13 all have outlet, in offgas duct
Being provided with as tail gas return duct 14, outlet pipe is provided with sewage backflow pipe 15, and tail gas return duct 14 and sewage backflow pipe 15 are respectively
Being communicated to gas phase import and the aqueous phase import of water sprayer 16, water sprayer 16 exports by pipeline connection to Hui Liushui gas distributor
17, in described Hui Liushui gas distributor 17 is arranged on reactor 1 and be positioned at below catalyst support grid 8 and at water inlet water distribution
Above device 3.Water sprayer is also referred to as ejector, it is possible to will reflux sewage and tail gas Returning reactor bottom so that the tail gas of backflow can
With in the case of normal pressure even negative pressure, return to reactor with the sewage formation air-water mixture of backflow and again participate in catalysis oxidation
Reaction.
Offgas duct between offgas duct outlet 18 and tail gas return duct 14 is provided with tail gas control valve 19, tail gas control valve
Being provided with ozone decomposed device 20 between 19 and outlet 18, tail gas return duct 14 is provided with backflow tail gas control valve 21；Sewage backflow
Pipeline between pipe 15 and outlet pipe outlet 22 is provided with sewage control valve 23, and sewage backflow pipe 15 is provided with backflow sewage control
Valve 24 processed and recirculation water booster pump 25.
Backwash water inlet pipe 26 and backwash air inlet pipe 27 it is additionally provided with, instead below reactor 1 inner catalyst supportive grid 8
Device top is answered to be provided with backwash drain pipe 28.
The outer circulation sewage disposal catalytic ozonation reactor utilizing the present invention to provide carries out the method step of sewage disposal
Rapid as follows:
(1) treatment sewage entrance water inlet pipe 6 is after water inlet booster pump 7 supercharging, is distributed uniformly by water inlet distributor 3
Circulating sewage processes catalytic ozonation reactor 1 bottom outside, and ozone passes through ozone distributor 2 after ozone air inlet pipe 5
Being evenly distributed in bottom reactor 1, treatment sewage and ozone, to upstream, enter beds 4, at beds 4
Interior generation catalytic ozonation reacts, and removes the pollutant in sewage；Catalytic ozonation course of reaction uses catalyst, urges
Agent is graininess, and particle diameter is 2～8mm；
(2) outlet pipe 13, the sewage one after process are entered by downflow weir 12 after the sewage after step (1) processes is collected
Part is discharged to the outside through outlet pipe outlet 22, and another part enters sewage backflow pipe 15, and sewage backflow returns than by sewage
Flow control valve 24 and backflow boosting pump 25 control between 200～400%；Enter after backflow sewage intensified pump 25 supercharging
The aqueous phase import of water sprayer 16；Produce in step (1) course of reaction enters after exhaust collection cover 10 is collected containing ozone tail gas
Offgas duct 11, a tail gas part forms tail gas up to standard after ozone decomposed device 20 processes and is expelled to outside, another part tail gas warp
Cross tail gas return duct 14 and enter water sprayer 16 gas phase import；Tail gas reflux ratio controlled 200 by tail gas recycle control valve 21～
Between 400%；
(3) sewage refluxed and tail gas are mixed to form air-water mixture in water sprayer 16 and are back to reaction by pipeline
In Hui Liushui gas distributor in device 1 17, upper enter beds 4, again participate in catalytic oxidation；
(4), after catalytic oxidation runs 6～7 days, beds 4 space and catalyst surface can be brought into by sewage
Or reaction produce float, colloid blocking or pollute, need periodically beds is carried out backwash, during backwash
First passing through backwash air inlet pipe 27 air inlet individually to recoil air purge, the time is 3～10 minutes, and air purge intensity is 12～25L/
(m2·s)；While the most not stopping air purge again by backwash water inlet pipe 26 carry out gas water associating backwash, the time is 3
～5 minutes, air purge intensity 10～15L/ (m2S), washing intensity 4～6L/ (m2·s)；Finally stop air purge, pass through backwash
Water inlet pipe 26 water inlet is individually washed, and the time is 3～10 minutes, washes intensity 8～16L/ (m2·s)；
(5) backwash water produced by step (4) being discharged by backwash drain pipe 28, backwash waste gas is by offgas duct 11 row
Go out.
The present invention effective hydraulic detention time of reactor when carrying out catalytic oxidation is 0.5～1.0 hour.
Heretofore described outer circulation sewage disposal catalytic ozonation reactor is fixed bed reactors.
Embodiment 1
Certain Treatment of Sewage Reservoir of Chemical Plant Treatment stations second pond draining, CODcr is between 85～96mg/l, and local externally discharged waste water
CODcr discharge standard is less than 50mg/l.Owing to this sewage is after biochemical treatment, secondary clarifier effluent BOD5Less than 8mg/l, B/C
Value, less than 0.1, belongs to difficult biochemical treatment sewage.By investigating and being expounded through peer review, intend using flocculation sand filtration+catalytic ozonation to process
Technique, and carried out checking and contrast test.Result of the test shows, sewage is after flocculation sand filtration processes, and CODcr is left at 80mg/l
The right side, flocculation sand filtration water outlet is after catalytic ozonation processes, and COD of sewage cr is up to below 50mg/l.For catalytic ozonation,
Carry out the contrast test of different reactor type, the outer circulation sewage disposal ozone catalytic oxygen that contrast test provides in the present invention
Change between reactor and conventional concurrent catalytic ozonation reactor (sewage, ozone pass through beds the most from bottom to top)
Carrying out, the catalyst that two set reactors are loaded is activated alumina loaded catalyst, and comparative test result is shown in Table 1.
Table 1
By table 1 result of the test it can be seen that the present invention provide outer circulation sewage disposal catalytic ozonation reactor relatively
Conventional catalytic ozonation reactor, ozone utilization rate is improved by a relatively large margin, and improves the sewage disposal degree of depth.
Embodiment 2
Certain Reuse of Waste Water In Refineries device uses double membrane process, and produced reverse osmosis concentrated water CODcr is 110～130mg/
Between l, do not reach CODcr less than 50mg/l discharge standard.Enterprise is according to waste water quality situation, in conjunction with domestic and international similar projects feelings
Condition, intends using catalytic ozonation+BAF (BAF) technique.Wherein catalytic ozonation act as removal part
CODcr, and improve sewage B/C value, it is beneficial to subsequent biochemical and processes.For guaranteeing treatment effect, carry out on-site verification test, examination
Test period contrast and investigate outer circulation sewage disposal catalytic ozonation reactor and the conventional concurrent ozone that the present invention provides
Catalyst oxidation reactor (sewage, ozone pass through beds the most from bottom to top) operational effect, two set reactors are loaded
Catalyst is activated alumina loaded catalyst, and comparative test result is shown in Table 2.
Table 2
By table 2 result of the test it can be seen that the present invention provide outer circulation sewage disposal catalytic ozonation reactor relatively
Conventional catalytic ozonation reactor, ozone utilization rate improves about 30%, and improves the sewage disposal degree of depth and sewage B/C
Value, the beneficially the most biochemical process up to standard of sewage.
Above the present invention is described in detail.Principle and embodiment to the present invention are set forth herein,
The core concept being only intended to help to understand the present invention described above.It should be pointed out that, the ordinary skill people for the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out some improvement and modification, these improve and
Modify in the protection domain also falling into the claims in the present invention.
Claims (3)
1. a sewage water treatment method, it is characterised in that comprise the following steps:
(1) treatment sewage is evenly distributed in outer circulation sewage disposal ozone catalytic by water inlet distributor after water inlet pipe
Oxidation reactor bottom, ozone is evenly distributed in reactor bottom by ozone distributor after ozone air inlet pipe, waits to locate
Reason sewage and ozone flow up through catalyst fixed bed layer, and catalytic ozonation reaction occurs in catalyst fixed bed layer；
(2) sewage overflow processed through step (1) enters outlet pipe, and a sewage part is outside outlet pipe outlet is discharged to
Portion, another part enters water sprayer through sewage backflow pipe；The tail gas produced in step (1) course of reaction is received through exhaust collection cover
Entering offgas duct after collection, a tail gas part is expelled to outside, and another part tail gas enters water sprayer through tail gas return duct；
(3) sewage refluxed and tail gas are mixed to form air-water mixture in water sprayer and are back in reactor by pipeline
Catalytic oxidation is again participated in Hui Liushui gas distributor；
Also comprise the steps:
(4), after catalytic oxidation runs 6～7 days, first pass through backwash air inlet pipe and be catalyzed in catalytic ozonation reactor
Below agent fixed bed, air inlet carries out independent air purge to inside reactor, is entered by backwash while the most not stopping air purge again
Water pipe water inlet inside reactor carried out gas water associating backwash, finally stop air inlet, intake to reaction by backwash water inlet pipe
Individually wash inside device；
(5) backwash water produced by step (4) being discharged by backwash drain pipe, backwash waste gas is discharged by offgas duct；
In step (4), the independent air purge time is 3～10 minutes, and air purge intensity is 12～25L/ (m2·s)；Gas water associating backwash time
Between be 3～5 minutes, air purge intensity 10～15L/ (m2S), washing intensity 4～6L/ (m2·s)；Individually washing time is 3～10
Minute, wash intensity 8～16L/ (m2·s)。
Sewage water treatment method the most according to claim 1, it is characterised in that: reactor tail gas reflux ratio be 200～
400%: sewage backflow ratio is 200～400%.
Sewage water treatment method the most according to claim 1, it is characterised in that: the effective hydraulic detention time of reactor is 0.5
～1.0 hours.
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| CN201410775121.3A CN104478066B (en) | 2014-12-15 | 2014-12-15 | Outer circulation sewage disposal catalytic ozonation reactor and sewage water treatment method |
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