CN107399805A

CN107399805A - The homogeneous ozonation technology of upward flow fixed bed

Info

Publication number: CN107399805A
Application number: CN201710323384.4A
Authority: CN
Inventors: 王兴文; 王金
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-05-10
Filing date: 2017-05-10
Publication date: 2017-11-28

Abstract

The present invention is the homogeneous ozone of upward flow fixed bed (catalysis) oxidation technology, primarily directed to ozone homogeneous catalytic oxidation technique, ozone heterogeneous catalytic oxidation technique and ozone high grade oxidation technique (O₃/H₂O₂) the defects of and the further raising effluent characteristics that propose and the solution for improving ozone utilization ratio.Used scheme is：1) haptoreaction pond is UBAF structure；2) water outlet of haptoreaction pond enters stabilization pond through drop, and stabilization pond is filter tank structure；3) stabilization pond water outlet enters quenched pond, and pond origin or beginning sets water quality monitoring instrument to be interlocked with medicine system, and chemicals addition control is carried out according to the requirement of Monitoring Data and lower sequence processing unit to water inlet.The present invention's is mainly used for：1) used as sewage treatment unit complete set technology；2) technique as wastewater advanced treatment and reclamation water process uses；3) used for being difficult to biodegradable sewage treatment process；4) decolorizing process technique as water uses.

Description

The homogeneous ozonation technology of upward flow fixed bed

1 art

The present invention relates to a kind of homogeneous ozonation technology of upward flow fixed bed, especially for：1) traditional ozone oxidation The defects of technique Ozone Gas Mass Transfer Efficiency is low and take solution, 2) promote ozone efficiently quickly produce hydroxyl radical free radical ( OH the solution) taken and 3) residual ozone and quick hydroxyl radical free radical (OH) in the water outlet of ozone contact reaction pond Clearing up and using water pollutant further reduces taken solution.

2 background technologies

Ozone is one of oxidant most strong known to the mankind, as the oxidant of sewage disposal, the main purpose of processing It is：1) Organic substance in water and some inorganic pollutions are removed；2) biodegradability of sewage is improved；3) colourity of water is removed；4) kill Bacterium sterilization etc..

The widely used ozonation technology of present water treatment field is the strong oxidizing property using ozone to being polluted in water Thing carries out the technology of oxidative degradation.In order to improve the oxidation efficiency of ozone, combined type high-level oxidation technology is employed mostly (such as O3/H2O2 etc.) or catalysis technique, here it is so-called ozone high grade oxidation or catalytic ozonation technique.In practical application In, according to the form of the catalyst used, homogenous process and heterogeneous process can be divided into.Homogeneous catalytic ozonation technique is adopted Catalyst is generally transition metal ions, and the catalyst that heterogeneous catalytic ozonation technique uses is solid metallic, gold Category oxide or the metal or metal oxide being supported on carrier.The homogeneous ozone oxidation of upward flow fixed bed that we use Technique is directed in the problem of catalyst loss in homogeneous catalytic ozonation technique and heterogeneous catalytic ozonation technique and urged The problem of agent fails, take the solution of uniqueness, it is ensured that effluent quality index and consumption indicators are comprehensively better than above-mentioned Two kinds of techniques.The ozonation technology that I takes charge of is unique homogeneous ozonation technology of upward flow fixed bed, so-called upward flow The flow direction for referring to current through haptoreaction pond packing layer is to flow upwardly through；So-called fixed bed refers to most ozone occur The place of oxidation reaction is the packed bed for having adsorptivity, so-called homogeneously to refer to that catalyst or reaction promoter etc. are entered in water It is just scattered before packing layer to be added in water, it is not to be fixed on filler surface in advance.

3 content of the invention

In order to efficiently solve the defects of 1) traditional ozonation technology Ozone Gas Mass Transfer Efficiency is low, 2) promote ozone efficient Quick the problem of producing hydroxyl radical free radical (OH) and 3) residual ozone rapid-digestion and make in the water outlet of ozone contact reaction pond Go out the problem of water pollutant further reduces, the invention provides：1) a kind of upward flow filter type O3 contacted oxidation reaction Pond, ozone gas are mixed into packing layer with water and reaction promoter (H2O2, NaOH or catalyst etc.) and (included but is not limited to：It is living Property charcoal particle, quartz sand, volcanic rock, ceramic aggregate biological filler or other fillers for having filtering function), sufficiently mixed, connect Touch, mass transfer, reaction and a kind of 2) process operation, i.e., by adding reaction promoter or catalyst in water inlet (including but not It is limited to H2O2, NaOH, transition metal ion catalyst, etc.), make to produce substantial amounts of hydroxyl within the ozone short time of packing area Base free radical (OH), so as to further improve reaction efficiency and 3) a kind of novel ozone resolution stabilization pond, meet water outlet The inflow requirement of lower sequence PROCESS FOR TREATMENT unit.

Scheme is used by the present invention solves its problem：1) ozone contact reaction pond, which uses, is similar to upward flow aeration The pool-type structure of biofilter, water, ozone, catalyst or reaction promoter are sufficiently mixed in packing layer, are contacted, be mass transfer, anti- Should；2) added in water inlet reaction promoter or catalyst (include but is not limited to H2O2, NaOH, transition metal ion catalyst, Deng), make to produce substantial amounts of hydroxyl radical free radical (OH) within the ozone short time of packing area, so as to further improve reaction Efficiency；3) stable tank main body is remaining in residual ozone and hydroxyl radical free radical (OH) and water for providing using filter pool-type structure Pollutant continues the place of reaction resolution, and filtrate includes but is not limited to：Activated carbon granule, quartz sand, volcanic rock, haydite Biologic packing material or other fillers and filler combination for having filtering function, and using ozone coagulation effect retained in filtering layer it is residual Remaining pollutant；4) instrument and meter for automation is set in the subsidiary quenched pond of stabilization pond, interlocked with chemicals dosing plant, according to actual measurement number Dosing adjustment processing is carried out to water quality according to the inflow requirement with lower sequence handling process unit.

The beneficial effects of the invention are as follows：1) on the premise of enough effective haptoreaction time is ensured, ozone contact is anti- Ying Chi hydraulic detention time is greatly reduced, typically not over 40min；2) ozone oxidation efficiency increases substantially, COD Removal efficiency reach as high as more than 90%.3) disappearing as a result of unique residual ozone and hydroxyl radical free radical (OH) Solution technology, thoroughly solve the problems, such as that they are formed to lower sequence biological processing unit and impact, reach for lower sequence biological processing unit Predetermined treatment effect provides support.

4 brief description of the drawings

Refer to Fig. 1.Fig. 1 is haptoreaction pond, stabilization pond, quenched pond and discharge bay structure principle chart.

In figure：1 --- water inlet control valve；2 --- backwash water inlet control valve；3 --- backwash air intake control valve；4 --- it is smelly Oxygen air intake control valve；5 --- haptoreaction pond atmospheric valve；6 --- haptoreaction pond backwash draining valve；7 --- haptoreaction pond Water distributing area；8 --- haptoreaction pond filter plate and filter；9 --- haptoreaction pond filler；10 --- haptoreaction pond exhalant region； 11 --- haptoreaction pond working water level；12 --- haptoreaction pond effluent weir；13 --- haptoreaction pond backwash water level； 14 --- haptoreaction pond backwash waste effluent weir；15 --- haptoreaction pond seal cover board；16 --- stabilization pond V-type water distribution Groove, 17 --- stable region working water level；18 --- stabilization pond filler；19 --- stabilization pond filter plate and filter；20 --- stabilization pond Exhalant region/backwash water distributing area；21 --- stabilization pond backwash rhone；22 --- stabilization pond atmospheric valve；23 --- stabilization pond water outlet Regulating valve；24 --- stabilization pond backwash intake valve；25 --- stabilization pond backwash water intaking valve；26 --- stabilization pond backwash waste is arranged Water valve；27 --- quenched pond；28 --- drop weir；29 --- discharge bay；30 --- flowing water Valve；31 --- haptoreaction Pond distribution device

5 embodiments

The present invention is described in further detail below in conjunction with accompanying drawing：

Sewage (adding reaction promoter or catalyst etc.) first passes around water inlet control valve (1) and enters the water distribution of haptoreaction pond Area (7), while rich gas ozoniferous enters the haptoreaction pond water distributing area (7) through ozone air intake control valve (4), herein Preliminary mixing contact is carried out, then enters packing area (9) commonly through the filter (8) on the filter plate of haptoreaction pond, Here depth mixing, contact, mass transfer, reaction are carried out.Sewage enters haptoreaction pond exhalant region (10) behind packing area, warp V-type distribution channel (16) of haptoreaction pond effluent weir (12) drop into stabilization pond.Then it is assigned to through V-type distribution channel (16) Stabilization pond filter material surface, into stabilization pond packing layer (18), ozone and hydroxyl radical free radical remaining in water are consumed herein, COD is further reduced, enter stabilization pond exhalant region/backwash water distributing area through the filter (19) on stabilization pond filter plate (20), go out water regulating valve (23) through stabilization pond and enter quenched pond (27), herein, handled according to water quality data and lower sequence single The inflow requirement progress of member is quenched, and the water to meet the requirements enters discharge bay by drop weir (28) again, passes through flowing water Valve (30) Gravity flow lifts submitting through pump.

Due to suspended material (SS) in sewage unavoidably be present, when work a period of time after, it is necessary to contact reaction tank filler Carry out backwash.When backwash starts, water inlet control valve (1) and ozone air intake control valve (4) are first closed；It is then turned on haptoreaction Water level is dropped to haptoreaction pond backwash water level (13) following certain distance by pond atmospheric valve (5), is then shut off haptoreaction pond and is put Empty valve (5), backwash air intake control valve (3) is opened, air purge is carried out to contact reaction tank filler (9), air purge is opened afterwards for a period of time Backwash water inlet control valve (2) and haptoreaction pond backwash draining valve (6), air-water joint is carried out to contact reaction tank filler (9) Backwash, after joint backwash for a period of time, backwash air intake control valve (3) is closed, when carrying out one section to contact reaction tank filler (9) Between independent washing.When the backwash of air-water joint and individually washing, backwash waste is through haptoreaction pond backwash waste effluent weir (14) backwash waste pond (otherwise designed) is drained into by haptoreaction pond backwash draining valve (6).Backwash process terminates, and closes simultaneously After closing backwash water inlet control valve (2) and haptoreaction pond backwash draining valve (6), open water inlet control valve (1) and ozone enters gas control Valve (4) processed, new processing cycle start again at.

When stabilization pond packing layer (18), which works, to be needed to be backwashed for a period of time, stabilization pond water outlet tune is first shut off Save valve (23), water inlet control valve (1) and ozone air intake control valve (4)；Stabilization pond atmospheric valve (22) is then turned on by pool inner water position Reduce to a certain extent, be then turned on stabilization pond backwash intake valve (24) and stabilization pond backwash waste draining valve (26), start pair Stabilization pond packing layer (18) carries out air purge, through after a period of time, opening stabilization pond backwash water intaking valve (25), water inlet control valve (1) and ozone air intake control valve (4), start to carry out air-water backwash to stabilization pond packing layer (18), while to stabilization pond filler Layer (18) carries out surface sweep washing, through after a period of time, stabilization pond backwash intake valve (24) being closed, to stabilization pond packing layer (18) individually washed, through closing stabilization pond backwash water intaking valve (25) and stabilization pond backwash waste draining after a period of time Valve (26), backwash process terminates.Open stabilization pond and go out water regulating valve (23), stabilization pond restarts work.

Anti- scouring water comes from quenched pond (27).

Claims

1. a kind of homogeneous ozonation technology of upward flow fixed bed for water process, it is characterised in that its composition is divided into 5 Part：1) ozone generating unit；2) haptoreaction pond；3) stabilization pond；4) quenched pond (containing discharge bay)；5) adding of agent is set Apply.

2. the upward flow fixed bed homogeneous ozonation technology according to claim 1 for water process, it is characterized in that it Haptoreaction pond be similar with closure plate BAF structure, gas, water and reaction promoter are (including but unlimited In H₂O₂, NaOH, transition metal ion catalyst etc.) be sufficiently mixed, contact in packing layer, mass transfer, reaction, by 6 portions in pond It is grouped into：1) backwash water distributing area；2) packing layer (include but is not limited to activated carbon, quartz sand, volcanic rock, ceramic aggregate biological filler or Other fillers for having filtering or adsorption function)；3) clear water zone；4) effluent weir (groove), 5) backwash drainage weir (groove) and 6) contact is instead Answer pond distribution device.

3. the upward flow fixed bed homogeneous ozonation technology according to claim 1 for water process, it is characterized in that surely Pond is determined in haptoreaction pond downstream, is similar V-type filter tank structure, and water outlet drop in haptoreaction pond enters water inlet V-type distribution channel, should Stock water enters packing layer, and amounts of residual contamination continues to react, disappeared in residual ozone and hydroxyl radical free radical (OH) and water in water Solve, be made up of in the pond of stabilization pond 6 parts：1) water inlet V-type distribution channel, 2) packing layer (including but not limited to activated carbon, quartz Sand, volcanic rock, ceramic aggregate biological filler or other filler combinations for having filtering or adsorption function), 3) filter plate and filter tip, 4) gathering ground (and backwash water and air distributing area), 5) outlet water control valve door (is slowly opened to ensure the water level base on stabilization pond packing layer during operation This holding is constant), 6) located at the backwash draining effluent trough in packing area side or packing area centre position.

4. the upward flow fixed bed homogeneous ozonation technology according to claim 1 for water process, it is characterized in that connecing Touch technique water distribution, technique gas distribution, backwash water distribution, backwash gas distribution in reaction tank for packing layer and use same set of filter.

5. the upward flow fixed bed homogeneous ozonation technology according to claim 1 for water process, it is characterized in that adjusting In stabilization pond downstream, it has following feature in matter pond：1) it is revolution gallery structure, it is therefore an objective to current are guided using gallery is turned round, Dead angle (or slough) is avoided, makes full use of pond internal volume；2) line instrumentation is located in the head end of revolution gallery, is set with dosing Apply it is chain, according to detection data and downstream processing unit inflow requirement automatic feeding medicament, to water carry out it is quenched, make its satisfaction The influent quality requirement of downstream processing unit.

6. the upward flow fixed bed homogeneous ozonation technology according to claim 1 for water process, it is characterized in that Haptoreaction Chi, which is always intake, adds NaOH or the like, make accessing pending water pH reach 8 and more than, in quenched pond under The inflow requirement of sequence processing unit, which adds acid or the like, makes pH be adjusted downward within the scope of 6~9.