CN104478066A - Catalytic ozonation reactor for treatment of external circulating wastewater and wastewater treatment method - Google Patents
Catalytic ozonation reactor for treatment of external circulating wastewater and wastewater treatment method Download PDFInfo
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- CN104478066A CN104478066A CN201410775121.3A CN201410775121A CN104478066A CN 104478066 A CN104478066 A CN 104478066A CN 201410775121 A CN201410775121 A CN 201410775121A CN 104478066 A CN104478066 A CN 104478066A
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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
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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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
- 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
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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
- C02F2305/00—Use of specific compounds during water treatment
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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
- 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 catalytic ozonation reactor for treatment of external circulating wastewater. A tail gas pipe and a wastewater outlet pipe are arranged on a reactor, and are provided with reflux pipes; a tail gas reflux pipe and a wastewater reflux pipe are respectively communicated to a gas-phase inlet and a water-phase inlet of a water ejector; and an outlet of the water ejector is communicated with the inside of a reactor through a pipeline. The invention also discloses a wastewater treatment method. By virtue of the catalytic ozonation reactor for treatment of the external circulating wastewater, processed wastewater and tail gas are refluxed; and the ozone dissolved in the wastewater and the residual ozone in the tail gas are fully utilized to carry out catalytic oxidization reaction again, so that the wastewater treatment depth is improved; the ozone utilization rate is greatly improved; and the wastewater treatment depth is improved.
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 ecotope gone from bad to worse, country constantly promulgates more strict environmental protection standard, to the requirement of sewage disposal also in continuous raising.When, water scarcity serious at current water pollutions, energy-saving and emission-reduction, sewage qualified discharge and reusing sewage become an important process of manufacturing enterprise.In the past traditional sewage disposal technology has been difficult to meet the sewage drainage standard of increasingly stringent and the requirement of reusing sewage, thus proposes the technical need of advanced treatment of wastewater.
High-level oxidation technology is an emerging water technology, can produce the strong oxidative free radical groups such as hydroxyl radical free radical, substantially increase oxidation capacity in reaction process, effectively degrades the pollutent in water.As one of high-level oxidation technology, ozone oxidation or catalytic ozonation concept obtain and develop faster after last century, the nineties was suggested, no matter ozone oxidation or catalytic ozonation, all have industrialization case in operation.
Catalytic ozonation mainly adopts the mode of perforated pipe or micro-pore aeration to pass in water by ozone at present, and the bubble formed in sewage due to ozone is comparatively large, and dissolution rate is lower, thus causes ozone utilization rate low, more containing ozone content in outer last person's gas.
For improving ozone utilization rate and sewage treating efficiency, the mode of catalytic ozonation is generally adopted to carry out sewage disposal at present.Catalytic ozonation has been successfully applied to the aspects such as the difficult biochemical sewage pre-treatment of advanced treatment of wastewater, reusing sewage and high density, and its ozone utilization rate and the more independent ozone oxidation of sewage treating efficiency improve a lot.But at present the research of catalytic ozonation mainly concentrates on catalyzer research and development aspect, have developed the catalyzer of different carriers and load different activities component, as with gac, activated alumina or molecular sieve etc. for carrier, load MnO, CuO, ZnO, TiO
2, CeO
2, SeO
2more than ten plant active ingredient Deng nearly, carry out the catalyzer that various combination is developed; The catalyzer developed is different, and treatment effect is each variant.Research Emphasis is placed on exploitation effective catalyst to improve in ozone utilization rate and sewage treating efficiency by current each research institution, and seldom has and improve ozone utilization rate and sewage treating efficiency by studying, designing and developing high efficiency reactor.The reactor of current investigation and application is mainly two kinds, one be sewage ozone coflow, by reactor bottom from bottom to top by reactor catalyst bed, there is catalytic oxidation; Another kind be sewage ozone countercurrent flow, sewage from top to bottom, ozone from bottom to top by reactor bed, there is catalytic oxidation.
The subject matter that existing catalytic ozonation reactor exists has:
(1) ozone do not dissolve in tail gas after sewage reaction, reacted does not reclaim, and discharges, cause the waste of ozone after the process of ozone decomposed device;
(2) the solvability ozone not having enough time in sewage to react directly is discharged, if follow-up sewage disposal is connected to biological processing unit, also need to carry out the process such as aeration to sewage, by ozone stripping, add treatment process on the one hand, cause the waste of ozone on the other hand;
(3) sewage residence time in reactor is generally 0.5 ~ 1.0 hour, and in sewage, the difficult oxidizing substance of part is following and oxidized is just discharged, and reaction depth is inadequate, causes sewage treating efficiency not high.
A kind of oil refining sewerage catalytic ozonation advanced treatment apparatus disclosed in Chinese patent literature CN203625104U, employing two ozone catalytic tower series connection, high pressure is adopted by waste water processes first catalytic ozonation tower, second catalytic ozonation tower adopts normal pressure, its principle is by first high-pressure ozone catalyzed oxidation tower, utilize high pressure, macromolecule contaminant is first degraded to small molecule contaminants, then uses low pressure, low concentration ozone degradation of small molecular pollutent by high-concentrated ozone.Its essence is actual is by adopting two catalytic ozonation towers raising ozone and waste water time to improve pollutent catalyzed oxidation degree, and initial oxidation passes through high pressure, high-concentrated ozone has come, namely the ratio of ozone and sewage or pollutent is improved, and ozone content determines by the processing condition of normal pressure catalytic ozonation tower in tail gas in final normal pressure catalytic ozonation tower, therefore this mode can improve the degree for the treatment of of dirty water pollutant, but really can not reduce ozone concn and ozone discharge amount in tail gas, namely ozone utilization rate does not really improve.Meanwhile, due to adopt two towers particularly first for high-pressure tower, facility investment is multiplied, and not easy to operate.
A kind of oil refining sewerage catalytic ozonation pretreatment unit disclosed in Chinese patent literature CN203625105U is also employing two towers and preoxidation tower and the series connection of catalyzed oxidation tower, time different from CN203625105U, its sewage and ozone are counter current contact, be included in adverse current in tower, and be also adverse current between the two towers, namely sewage is from preoxidation tower to catalyzed oxidation tower, and ozone is from catalyzed oxidation tower to preoxidation tower.Its deficiency remains and adds facility investment and operation easier, and from catalyzed oxidation tower tail gas out ozone concn (content) reduce after at preoxidation tower internal oxidition declines, therefore its preoxidation column efficiency is lower, improves ozone utilization rate do not preponderate economically compared with its investment by increasing this tower.
Summary of the invention
In sum, the object of the invention is to for above-mentioned existing catalyst oxidation reactor Problems existing, there is provided a kind of sewage tail gas outer circulation catalytic ozonation reactor, for fields such as the difficult biochemical sewage pre-treatment of the advanced treatment of sewage, reusing sewage and high density, than traditional catalytic ozonation reactor, increase substantially ozone utilization rate, increase reaction depth, improve 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 rising pipe, it is characterized in that: offgas duct and rising pipe are equipped with return line, and tail gas return line and sewage backflow pipe are communicated to gas phase import and the aqueous phase import of water sprayer respectively, water sprayer exports by pipeline connection in reactor.
Further, be provided with in reactor recirculation water gas sparger, the outlet of described water sprayer by pipeline connection to recirculation water gas sparger; Be provided with tail gas control valve between offgas duct relief outlet and tail gas return line, tail gas return line is provided with backflow tail gas control valve; Be provided with sewage control valve between rising pipe relief outlet and sewage backflow pipe, sewage backflow pipe is provided with backflow sewage control valve and recirculation water topping-up pump.
Further, inside reactor is upwards disposed with ozone sparger, inlet distribution device, described Hui Liushui gas sparger, catalyst support grid, catalyzer bed course and beds from bottom, reactor head is provided with exhaust collection cover, exhaust collection cover top is communicated with described offgas duct, is communicated with ozone decomposed device between offgas duct relief outlet and tail gas control valve; Ozone sparger is communicated with ozone inlet pipe, and inlet distribution device is communicated with water inlet pipe, and water inlet pipe is provided with into water topping-up pump.
Further, be also provided with back flushing water inlet pipe and back flushing inlet pipe below catalyst in reactor supportive grid, position reactor is positioned at above beds is provided with back flushing water shoot.
Further, the exhaust collection cover of described reactor and reactor shell convergence part are provided with a circle overflow weir, and overflow weir is connected with described rising pipe.
Utilize a sewage water treatment method for above-mentioned outer circulation sewage disposal catalytic ozonation reactor for treatment sewage, it is characterized in that comprising the following steps:
(1) treatment sewage is evenly distributed in outer circulation sewage disposal catalytic ozonation reactor lower part by water inlet distributor after water inlet pipe, ozone is evenly distributed in reactor bottom by ozone sparger after ozone inlet pipe, treatment sewage and ozone flow through beds, catalytic ozonation reaction occurs in beds;
(2) sewage overflow processed through step (1) enters rising pipe, and a sewage part is discharged to the outside through rising pipe relief outlet, and another part enters water sprayer through sewage backflow pipe; The tail gas produced in step (1) reaction process enters offgas duct after exhaust collection cover is collected, and a tail gas part is through tail gas pipeline is expelled to outside after the process of ozone decomposed device, and another part tail gas enters water sprayer through tail gas return line;
(3) sewage refluxed and tail gas in water sprayer, be mixed to form air-water mixture and by pipeline be back to recirculation water in reactor again participate in catalytic oxidation in gas sparger.
In sewage water treatment method of the present invention, also comprise the steps:
(4) after catalytic oxidation runs 6 ~ 7 days, first to air inlet below catalytic ozonation catalyst in reactor bed, independent air purge is carried out to beds by back flushing inlet pipe, while not stopping air purge again by back flushing water inlet pipe water inlet to beds carry out gas water associating backwash, finally stop air inlet, by the water inlet of back flushing water inlet pipe, beds is washed separately;
(5) backwash water that step (4) produces discharged by back flushing water shoot, 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, and air purge intensity is 12 ~ 25L/ (m
2s); Gas the water associating backwash time be 3 ~ 5 minutes, air purge intensity 10 ~ 15L/ (m
2s) intensity 4 ~ 6L/ (m, is washed
2s); Independent washing time is 3 ~ 10 minutes, washing intensity 8 ~ 16L/ (m
2s).
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 effect of the present invention is provide a kind of outer circulation sewage disposal catalytic ozonation reactor and utilize this reactor to carry out the method for sewage disposal, 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, tail gas qualified discharge can be met, environmental protection, economize on resources; Beds easy to clean, extending catalyst work-ing life, and fast cleaning removes suspended substance in time, improves catalytic oxidation efficiency; Device structure is simple, easy to operate, and utilization ratio is high, invests low.
Accompanying drawing explanation
Fig. 1 is outer circulation sewage disposal catalytic ozonation structure of reactor schematic diagram provided by the invention;
In figure:
1. reactor; 2. ozone sparger; 3. water inlet distributor; 4. beds; 5. ozone inlet pipe; 6. water inlet pipe; 7. water inlet topping-up pump; 8. catalyst support grid; 9. catalyzer bed course; 10. exhaust collection cover; 11. offgas duct; 12. overflow weirs; 13. rising pipes; 14. tail gas return lines; 15. sewage backflow pipes; 16. water sprayers; 17. recirculation waters gas sparger; 18. offgas duct relief outlets; 19. tail gas control valves; 20. ozone decomposed devices; 21. backflow tail gas control valves; 22. rising pipe relief outlets; 23. sewage control valves; 24. backflow sewage control valves; 25. recirculation water topping-up pumps; 26. back flushing water inlet pipes; 27. back flushing inlet pipe; 28. back flushing water shoots; 29. back flushing air inlets; 30. back flushing water inlets.
Embodiment
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, 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 circular or rectangle, comprise ozone sparger 2, water inlet distributor 3, beds 4, described ozone sparger 2, water inlet distributor 3 and beds 4 is upwards set gradually from bottom in reactor 1 inside, ozone sparger 2 connects ozone inlet pipe 5, and water inlet distributor 3 connects water inlet pipe 6, and water inlet pipe 6 is provided with into water topping-up pump 7; Be provided with catalyzer bed course 9 below beds 4, below catalyzer bed course 9, be provided with catalyst support grid 8; Reactor 1 top is provided with exhaust collection cover 10, and the cylindrical shell convergence part of exhaust collection cover 10 and reactor is provided with a circle overflow weir 12, and being positioned at above beds 4 and being positioned at below exhaust collection cover 10, overflow weir 12 is communicated with rising pipe 13.
Exhaust collection cover 10 top is communicated with offgas duct 11, offgas duct 11 and rising pipe 13 all there is relief outlet, offgas duct is provided with as tail gas return line 14, rising pipe is provided with sewage backflow pipe 15, and tail gas return line 14 and sewage backflow pipe 15 are communicated to gas phase import and the aqueous phase import of water sprayer 16 respectively, water sprayer 16 export by pipeline connection to recirculation water gas sparger 17, described recirculation water gas sparger 17 to be arranged in reactor 1 and to be positioned at below catalyst support grid 8 and above water inlet distributor 3.Water sprayer also claims ejector, can by backflow sewage and tail gas Returning reactor bottom, make the tail gas that refluxes can when normal pressure even negative pressure, form air-water mixture with the sewage of backflow and get back to reactor and again participate in catalytic oxidation.
Offgas duct between offgas duct relief outlet 18 and tail gas return line 14 is provided with tail gas control valve 19, is provided with ozone decomposed device 20 between tail gas control valve 19 and relief outlet 18, and tail gas return line 14 is provided with backflow tail gas control valve 21; Pipeline between sewage backflow pipe 15 and rising pipe relief outlet 22 is provided with sewage control valve 23, and sewage backflow pipe 15 is provided with backflow sewage control valve 24 and recirculation water topping-up pump 25.
Also be provided with back flushing water inlet pipe 26 and back flushing inlet pipe 27 below reactor 1 inner catalyst supportive grid 8, reactor top is provided with back flushing water shoot 28.
The method steps utilizing outer circulation sewage disposal catalytic ozonation reactor provided by the invention to carry out sewage disposal is as follows:
(1) treatment sewage enters water inlet pipe 6 after the supercharging of water inlet topping-up pump 7, outer circulation sewage disposal catalytic ozonation reactor 1 bottom is evenly distributed in by water inlet distributor 3, ozone is evenly distributed in bottom reactor 1 by ozone sparger 2 after ozone inlet pipe 5, treatment sewage and ozone are to upper reaches, enter beds 4, in beds 4, there is catalytic ozonation reaction, remove the pollutent in sewage; Use catalyzer in catalytic ozonation reaction process, catalyzer is particulate state, and particle diameter is 2 ~ 8mm;
(2) sewage after step (1) process enters rising pipe 13 after being collected by overflow weir 12, a sewage part after process is discharged to the outside through rising pipe relief outlet 22, another part enters sewage backflow pipe 15, and sewage backflow is than controlling between 200 ~ 400% by sewage backflow control valve 24 and backflow boosting pump 25; Backflow sewage enters the aqueous phase import of water sprayer 16 after topping-up pump 25 supercharging; What produce in step (1) reaction process enters offgas duct 11 containing ozone tail gas after exhaust collection cover 10 is collected, a tail gas part forms tail gas up to standard and is expelled to outside after ozone decomposed device 20 processes, and another part tail gas enters the import of water sprayer 16 gas phase through tail gas return line 14; Tail gas reflux ratio controls between 200 ~ 400% by tail gas recycle control valve 21;
(3) sewage refluxed and tail gas in water sprayer 16, be mixed to form air-water mixture and by pipeline be back to recirculation water in reactor 1 in gas sparger 17, upper reaches enters beds 4, again participates in catalytic oxidation;
(4) after catalytic oxidation runs 6 ~ 7 days, beds 4 space and catalyst surface can by bring in sewage or suspended substance, colloid blocking that reaction produces or pollute, need regularly to carry out back flushing to beds, first to be recoiled separately air purge by back flushing inlet pipe 27 air inlet during back flushing, time is 3 ~ 10 minutes, and air purge intensity is 12 ~ 25L/ (m
2s); While not stopping air purge afterwards again by back flushing water inlet pipe 26 carry out gas water associating backwash, the time is 3 ~ 5 minutes, air purge intensity 10 ~ 15L/ (m
2s) intensity 4 ~ 6L/ (m, is washed
2s); Finally stop air purge, washed separately by back flushing water inlet pipe 26 water inlet, the time is 3 ~ 10 minutes, washing intensity 8 ~ 16L/ (m
2s);
(5) backwash water that step (4) produces discharged by back flushing water shoot 28, backwash waste gas is discharged by offgas duct 11.
The present invention's effective hydraulic detention time of reactor when carrying out catalytic oxidation is 0.5 ~ 1.0 hour.
Outer circulation sewage disposal catalytic ozonation reactor described in the present invention is fixed-bed reactor.
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 emission standard is for being less than 50mg/l.Because this sewage is after biochemical treatment, secondary clarifier effluent BOD
5be less than 8mg/l, B/C value is less than 0.1, belongs to difficult biochemical treatment sewage.By investigating and being expounded through peer review, intend adopting flocculation sand filtration+catalytic ozonation treatment process, and carried out checking and simultaneous test.Test-results shows, sewage is after flocculation sand filtration process, and CODcr is at about 80mg/l, and flocculation sand filtration water outlet is after catalytic ozonation process, and COD of sewage cr can reach below 50mg/l.For catalytic ozonation, carry out the simultaneous test of different reactor type, simultaneous test is carried out between outer circulation sewage disposal catalytic ozonation reactor provided by the invention and conventional concurrent catalytic ozonation reactor (sewage, ozone pass through beds all from bottom to top), the catalyzer that two cover reactors load is activated alumina loaded catalyst, and comparative test result is in table 1.
Table 1
As can be seen from table 1 test-results, the more conventional catalytic ozonation reactor of outer circulation sewage disposal catalytic ozonation reactor provided by the invention, 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 adopts two membrane process, and the reverse osmosis concentrated water CODcr produced, between 110 ~ 130mg/l, does not reach CODcr and is less than 50mg/l emission standard.Enterprise, according to waste water quality situation, in conjunction with domestic and international similar projects situation, intends adopting catalytic ozonation+BAF (BAF) technique.Wherein catalytic ozonation act as and removes part CODcr, and improves sewage B/C value, is beneficial to subsequent biochemical process.For guaranteeing treatment effect, carry out on-site verification test, outer circulation sewage disposal catalytic ozonation reactor provided by the invention and conventional concurrent catalytic ozonation reactor (sewage, ozone pass through beds all from bottom to top) operating performance have been investigated in duration of test contrast, the catalyzer that two cover reactors load is activated alumina loaded catalyst, and comparative test result is in table 2.
Table 2
As can be seen from table 2 test-results, the more conventional catalytic ozonation reactor of outer circulation sewage disposal catalytic ozonation reactor provided by the invention, ozone utilization rate improves about 30%, and improves the sewage disposal degree of depth and sewage B/C value, is conducive to the further biochemical process up to standard of sewage.
Above to invention has been detailed introduction.Set forth principle of the present invention and embodiment herein, above explanation just understands core concept of the present invention for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. an outer circulation sewage disposal catalytic ozonation reactor, reactor is provided with offgas duct and sewage rising pipe, it is characterized in that: offgas duct and rising pipe are equipped with return line, and tail gas return line and sewage backflow pipe are communicated to gas phase import and the aqueous phase import of water sprayer respectively, water sprayer exports by pipeline connection in reactor.
2. outer circulation sewage disposal catalytic ozonation reactor according to claim 1, is characterized in that: be provided with in reactor recirculation water gas sparger, the outlet of described water sprayer by pipeline connection to recirculation water gas sparger; Be provided with tail gas control valve between offgas duct relief outlet and tail gas return line, tail gas return line is provided with backflow tail gas control valve; Be provided with sewage control valve between rising pipe relief outlet and sewage backflow pipe, sewage backflow pipe is provided with backflow sewage control valve and recirculation water topping-up pump.
3. outer circulation sewage disposal catalytic ozonation reactor according to claim 2, it is characterized in that: inside reactor is upwards disposed with ozone sparger, inlet distribution device, described Hui Liushui gas sparger, catalyst support grid, catalyzer bed course and beds from bottom, reactor head is provided with exhaust collection cover, exhaust collection cover top is communicated with described offgas duct, is communicated with ozone decomposed device between offgas duct relief outlet and tail gas control valve; Ozone sparger is communicated with ozone inlet pipe, and inlet distribution device is communicated with water inlet pipe, and water inlet pipe is provided with into water topping-up pump.
4. outer circulation sewage disposal catalytic ozonation reactor according to claim 3, it is characterized in that: be also provided with back flushing water inlet pipe and back flushing inlet pipe below catalyst in reactor supportive grid, position reactor is positioned at above beds is provided with back flushing water shoot.
5. the outer circulation sewage disposal catalytic ozonation reactor according to any one of claim 1-4, it is characterized in that: the exhaust collection cover of described reactor and reactor shell convergence part are provided with a circle overflow weir, and overflow weir is connected with described rising pipe.
6. a sewage water treatment method, is characterized in that comprising the following steps:
(1) treatment sewage is evenly distributed in outer circulation sewage disposal catalytic ozonation reactor lower part by water inlet distributor after water inlet pipe, ozone is evenly distributed in reactor bottom by ozone sparger after ozone inlet pipe, treatment sewage and ozone upwards flow through beds, and catalytic ozonation reaction occurs in beds;
(2) sewage overflow processed through step (1) enters rising pipe, and a sewage part is discharged to the outside through rising pipe relief outlet, and another part enters water sprayer through sewage backflow pipe; The tail gas produced in step (1) reaction process enters offgas duct after exhaust collection cover is collected, and a tail gas part is expelled to outside, and another part tail gas enters water sprayer through tail gas return line;
(3) sewage refluxed and tail gas in water sprayer, be mixed to form air-water mixture and by pipeline be back to recirculation water in reactor again participate in catalytic oxidation in gas sparger.
7. sewage water treatment method according to claim 6, characterized by further comprising following steps:
(4) after catalytic oxidation runs 6 ~ 7 days, first to air inlet below catalytic ozonation catalyst in reactor bed, independent air purge is carried out to beds by back flushing inlet pipe, while not stopping air purge afterwards again by back flushing water inlet pipe water inlet to beds carry out gas water associating backwash, finally stop air inlet, by the water inlet of back flushing water inlet pipe, beds is washed separately;
(5) backwash water that step (4) produces discharged by back flushing water shoot, backwash waste gas is discharged by offgas duct.
8. sewage water treatment method according to claim 7, is characterized in that: in step (4), the independent air purge time is 3 ~ 10 minutes, and air purge intensity is 12 ~ 25L/ (m
2s); Gas the water associating backwash time be 3 ~ 5 minutes, air purge intensity 10 ~ 15L/ (m
2s) intensity 4 ~ 6L/ (m, is washed
2s); Independent washing time is 3 ~ 10 minutes, washing intensity 8 ~ 16L/ (m
2s).
9. sewage water treatment method according to claim 7, is characterized in that: reactor tail gas reflux ratio is 200 ~ 400%: sewage backflow ratio is 200 ~ 400%.
10. sewage water treatment method according to claim 7, is characterized in that: the effective hydraulic detention time of reactor is 0.5 ~ 1.0 hour.
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| CN109437390A (en) * | 2018-12-19 | 2019-03-08 | 南京大学盐城环保技术与工程研究院 | A kind of reactor and its application method of catalytic ozonation waste water |
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| CN110304707A (en) * | 2019-07-04 | 2019-10-08 | 江苏五水环境工程有限公司 | A kind of sewage waste gas treatment equipment and its application method with medicine charging function |
| CN110606540A (en) * | 2019-11-05 | 2019-12-24 | 博天环境集团股份有限公司 | Ozone catalytic oxidation reactor and process thereof |
| CN110818064A (en) * | 2019-11-19 | 2020-02-21 | 云南城投碧水源膜科技有限责任公司 | Fluidized bed type ozone catalytic oxidation three-phase separation reaction device and system |
| CN110980918A (en) * | 2019-11-25 | 2020-04-10 | 哈尔滨工创环保科技有限公司 | Multistage ozone catalytic oxidation internal circulation device and use method |
| CN112047455A (en) * | 2020-09-25 | 2020-12-08 | 北京首创股份有限公司 | Advanced treatment system and method for sewage through catalytic ozonation |
| CN112919612A (en) * | 2021-01-22 | 2021-06-08 | 北创清源(北京)科技有限公司 | Rotational flow gas-liquid uniform distribution type sewage treatment device, sewage treatment system and sewage treatment method |
| CN113735245A (en) * | 2021-04-30 | 2021-12-03 | 清华苏州环境创新研究院 | Method for catalytic oxidation of sewage by ozone |
| CN113620466A (en) * | 2021-08-16 | 2021-11-09 | 华夏碧水环保科技有限公司 | Novel ozone catalytic oxidation reactor |
| CN114433105A (en) * | 2022-01-20 | 2022-05-06 | 南京大学 | Preparation method and application of supported bimetal ceramsite catalyst |
| CN114433105B (en) * | 2022-01-20 | 2023-09-12 | 南京大学 | Preparation method and application of supported bimetallic ceramsite catalyst |
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Denomination of invention: External circulation sewage treatment ozone catalytic oxidation reactor and sewage treatment method Effective date of registration: 20211015 Granted publication date: 20161130 Pledgee: South Taihu New Area sub branch of Huzhou Wuxing Rural Commercial Bank Co.,Ltd. Pledgor: ZHEJIANG CATHAYRIPE ENVIRONMENTAL ENGINEERING Co.,Ltd. Registration number: Y2021330001922 |
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