CN206232466U - Two-stage multiphase Fenton fluidized system - Google Patents
Two-stage multiphase Fenton fluidized system Download PDFInfo
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- CN206232466U CN206232466U CN201621343441.2U CN201621343441U CN206232466U CN 206232466 U CN206232466 U CN 206232466U CN 201621343441 U CN201621343441 U CN 201621343441U CN 206232466 U CN206232466 U CN 206232466U
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Abstract
The utility model provides two-stage multiphase Fenton fluidized system, and it includes：One-level, second reactor and hydrogen peroxide, ferrous sulfate, NaOH throwing device；First-stage reactor or second reactor：Inner bottom side sets water-locator, and water-locator lower section is water distributing area, and water distributing area sets water inlet and circulating water outlet；Water-locator top is the cavity for forming fluidized-bed layer, and reactor head periphery sets receipts mill weir, and it is solid-liquid displacement zone to receive mill weir lower section, and it sets receipts water pipe between cavity；Dosing mouth, delivery port and circulation water inlet are set on the wall of side；Recirculated water gateway is connected to circulating pump gateway by pipeline；Hydrogen peroxide, ferrous sulfate throwing device are connected with first-stage reactor, and NaOH throwing device is connected with second reactor；The delivery port of first-stage reactor is connected by pipeline with the water inlet of second reactor.The system architecture is simple, and structure of reactor is simple, both for chemicrystallization creates suitable fluid dynamics condition and easy to maintenance, is adapted to industrial applications.
Description
Technical field
The utility model is related to two-stage multiphase Fenton fluidized system, belongs to field of waste water treatment.
Background technology
Fenton fluidized bed applications are in the advanced treating stage of bio-refractory waste water.For the discharge of wastewater mark for improving constantly
Standard, for the waste water of bio-refractory, it is necessary to COD, colourity in waste water etc. are further removed using high-level oxidation technology.Fenton
Fluid bed passes through additional H2O2Oxidant and ferrous sulfate, i.e., so-called Fenton reagent, both react product under appropriate pH
Raw hydroxyl free radical (OH), is reacted, decomposable asymmetric choice net oxidation using the high oxidative capacity and the organic matter in waste water of hydroxyl free radical
It is H2O and CO2, the COD of bio-refractory in waste water is carried out into oxidation Decomposition.
Existing Fenton fluid bed chemical feeding quantity is big, sludge quantity is also big, produces a large amount of secondary pollutions, does not have the circulatory system, contacts
It is insufficient, poor processing effect, and special carrier overlay film is generally required, the uncrystallizable recovery of molysite, regarding to the issue above, this
Need a kind of low consumption dose of exploitation, low energy consumption, fluidization and system from crystallization badly in field.
Utility model content
Main purpose of the present utility model is to provide a kind of two-stage multiphase Fenton fluidized system, and the system is amount of consumption of drugs
It is low, the low fluidized system from crystallization of energy consumption, it need not add carrier or nucleus, and recyclable high purity iron salt.
Therefore, the utility model provides a kind of two-stage multiphase Fenton fluidized system, the system includes：First-stage reactor,
Second reactor, hydrogen peroxide throwing device, ferrous sulfate throwing device and NaOH throwing device；
The first-stage reactor or second reactor are independently of one another：Inner bottom side is provided with water-locator, under the water-locator
Portion is water distributing area, and the reactor cylinder side wall of the water distributing area is provided with water inlet and circulating water outlet；The water-locator top
It is the cavity for forming fluidized-bed layer, reactor head periphery is provided with receipts mill weir, and the receipts mill weir lower section is solid-liquid displacement zone,
Receipts water pipe is provided between the solid-liquid displacement zone and the cavity for forming fluidized-bed layer；Reaction above the water-locator
Device cylinder lateral wall is provided with dosing mouth, delivery port and circulation water inlet, and the delivery port is located at the crest of weir of the receipts mill weir；It is described
Receive water pipe to be connected with the circulation water inlet, the circulation water inlet is connected to the entrance of circulating pump, the circulation by pipeline
Water out is connected to the outlet of the circulating pump by pipeline；
The hydrogen peroxide throwing device and the ferrous sulfate throwing device by pipeline respectively with the first-stage reactor
Independent dosing mouth be connected, the NaOH throwing device is connected by pipeline with the dosing mouth of the second reactor；
The delivery port of the first-stage reactor is connected by pipeline with the water inlet of the second reactor.
Water-locator in the utility model first-stage reactor or second reactor is used to ensure that water distribution is uniform, receives water pipe and be used to
Ensure to receive water uniformly, the two is most important to forming the necessary hydraulics of crystallization fluid bed, to the stabilization of fluidized needed for crystallization
Play an important role.Circulation water inlet, outlet above the cylinder lateral wall of the utility model first-stage reactor or second reactor
It is anti-for being formed and circulating pump forms circulation (circulating pump and outlet pipeline, water return pipeline) by corresponding pipeline
Upflow velocity higher in device is answered, and for " large quantities of crystallizations " provides suitable fluidised form.
According to specific embodiment of the present utility model, in described two-stage multiphase Fenton fluidized system, the receipts
Water pipe is that ring-type receives water pipe.This kind is set can not influence that in the case of maintenance optimal receipts water effect, anti-water-stop body turbulent flow can be reached.
According to specific embodiment of the present utility model, in described two-stage multiphase Fenton fluidized system, the system
System also includes acid dip pickle, the first-stage reactor or second reactor reactor independently of one another above the water-locator
Pickling feeding opening is additionally provided with cylinder lateral wall, the acid dip pickle passes through pipeline and the first-stage reactor and/or second order reaction
The pickling feeding opening of device is connected.The adapter constitute the pickling circulatory system (circulating pump and outlet pipeline, water return pipeline), for
After reactor is out of service, pickling is carried out specifically designed for water-locator.
According to specific embodiment of the present utility model, in described two-stage multiphase Fenton fluidized system, it is described enter
The mouth of a river is located at circulating water outlet top, and the dosing mouth is located at water inlet top, and the circulation water inlet is located at institute
Dosing mouth top is stated, the delivery port is located at the recirculated water entrance top.Preferably, the dosing mouth is located at reactor shell
Middle part.
According to specific embodiment of the present utility model, in described two-stage multiphase Fenton fluidized system, described one
Slag-drip opening is additionally provided with stage reactor or second reactor reactor cylinder side wall independently of one another above the water-locator.
According to specific embodiment of the present utility model, in described two-stage multiphase Fenton fluidized system, the system
System also includes one-level material pond and two grades of material ponds, and the slag-drip opening of the first-stage reactor passes through pipeline and the one-level material pond
It is connected, the slag-drip opening of the second reactor is connected by pipeline with two grades of material ponds.
According to specific embodiment of the present utility model, in described two-stage multiphase Fenton fluidized system, described one
Sample tap is additionally provided with stage reactor or second reactor reactor cylinder side wall independently of one another above the water-locator,
The sample tap is connected with probe tube.
According to specific embodiment of the present utility model, in described two-stage multiphase Fenton fluidized system, with sampling
The connected sample tap of pipe is 3~4, and it is distributed between the circulation water inlet and the water-locator in vertical direction.If
The purpose for putting sample tap and probe tube is for sampling the granule content in observation water sample, with this determination fluidized-bed layer highly.
According to specific embodiment of the present utility model, in described two-stage multiphase Fenton fluidized system, described one
Stage reactor or second reactor set up dismountable inclined tube filler in the solid-liquid displacement zone independently of one another.Set up detachable
Inclined tube filler can strengthen solid-liquid separation effect.
According to specific embodiment of the present utility model, in described two-stage multiphase Fenton fluidized system, described one
The water inlet of stage reactor is connected with water inlet pipe, and pump is set on the water inlet pipe.
The above-mentioned technical characteristic of the utility model can be mutually combined, to reach more preferably technique effect.As preferred mode,
The utility model system includes the technical characteristic in terms of the structure and/or construction of all of the above.Using the difficult drop of the treatment of the system
Solving the method for waste water includes startup, the operation of reactor, the stopping three phases of reactor of reactor：
(1) startup stage of reactor：In startup stage, not for the purpose of crystallization, but with configurational ion in water simultaneously
It is a large amount of to form crystalline precipitate, crystal growth, form crystal grain fluid bed for target, former pond need to be back to, participate in anti-again
Should；
Raw water is calculated by hydraulic detention time minimum discharge injecting reactor first, to reactor in liquid level flood
Circulatory system outlet pipe, then starts backflow water circulation system, waste water upflow velocity in reactor is reached minimal design and rises
Flow velocity, while pressing maximum [H2O2]/[COD] than and [Fe3+]/[COD] add in medicament to reactor；In reactor inner recirculation flow
During dynamic, fully reaction, degradation of organic substances；
There is following course of reaction in reactor：During reactor internal circulation flow, medicament is sufficiently mixed with raw water,
Crystalline material forms supersaturated solution, and in first-stage reactor (solid-liquid two-phase flow fluidized bed reactor), hydraulic mixing causes current
In strong turbulence state, solid-liquid two-phase contact interface is constantly updated, and two alternate speed differences are larger, enhance two alternate biographies
Matter is acted on, and a large amount of crystal settlings are generated simultaneously in reactor；Under hydraulic shear effect, the molysite fine crystals particle for having generated
Bulky grain can't be each other gathered into, but the crystalline material in aqueous solution body stably expands to tiny molysite plane of crystal
It is scattered, mobile, lattice is then embedded in some way, so that single crystal particle diameter increases, and form uniform and fine and close crystallization
Particle；Extension over time, reactor bottom is formed the fluidized particles bed of certain altitude, and now startup stage is complete
Into.
(2) operation phase of reactor：In the operation phase, crystal grain fluid bed has been formed, each according to water outlet COD adjustment
The operational factor of stage reactor, the discharge of reactor standard water discharge.
Step i：Raw water and first-stage reactor recirculation water mix from first-stage reactor bottom into water distributing area, by water-locator
After water distribution uniformity, in uniformly rising to first-stage reactor cavity with certain upflow velocity, hydrogen peroxide and ferrous sulfate are also with one
Fixed [H2O2]/[COD] than and [Fe3+]/[COD] ratio flows into this；In first-stage reactor cavity, the original for continually entering
Water and hydrogen peroxide and ferrous sulfate form supersaturated solution, and under the specific hydraulics of fluidized-bed reactor, configurational ion is " big
Batch crystallization ", and the crystal grain of certain particle diameter is grown into, the crystalline particle bed of fluidisation state is gradually formed inside reactor cavity
Layer, raw water is from bottom to top by the way that during fluidized-bed layer, the COD in raw water is able to be removed from water；Raw water is further up
To solid-liquid displacement zone, crystal grain retains in the reactor in the presence of gravity or separator for mud and water, and supernatant is via top
Receive mill weir to collect, gravity flow enters second reactor bottom water distributing area；
Step ii：Primary effluent mixes with second reactor recirculation water in second reactor water distributing area, equal by water-locator
After even water distribution, second reactor cavity inside is uniformly risen to certain upflow velocity, NaOH is also with certain
[OH-]/[Fe3+] ratio flows into this；In second reactor cavity, primary effluent, the second reactor time for continually entering
Flowing water and ferrous sulfate form supersaturated solution, under the specific hydraulics of fluidized-bed reactor, configurational ion " large quantities of knots
Crystalline substance ", and the crystal grain of certain particle diameter is grown into, the crystalline particle bed of fluidisation state, one are gradually formed inside reactor cavity
During level water outlet passes through fluidized-bed layer from bottom to top, the Fe in water2+Removed；Primary effluent is further up to solid-liquid
Disengagement zone, crystal grain retains in the reactor in the presence of gravity or separator for mud and water, and supernatant receives mill weir via top
Collect, finally by secondary effluent pipe discharge system；
Step iii：Being continuously generated and grow with crystal, the highly stable growth of fluidized-bed layer is simultaneously layered, particle diameter is small,
On bed top, the particle that particle diameter is big, quality is big periodically discharges bottom particles to the particle of light weight in bed bottom, to ensure
Reactor runs under suitable hydraulics always；Sample tap can be provided with sidewall of reactor different height, by observation not
With granule content and size in height water sample, fluidized-bed layer height and the deslagging frequency are determined；One-level, second reactor bottom,
Water-locator top, can be provided with scum pipe, by the regular deslagging of discharge pipeline, the fluidized-bed layer kept certain height, and obtain compared with
The Fe (OH) of high-purity3Particle.
In step iii, the determination method of one-level, the spoil disposal frequency of second reactor and bed height：It is true by bed height
Determine spoil disposal frequency, keep bed height account for the 3/4 of reactor cavity part (part more than water-locator, between backflow water out) with
Under be advisable；The judgement of bed height：On the side wall of reactor cavity part, can uniform 3~4 sample taps, periodically sampling, examine
Crystalline particle content in water sample is seen, with the height of this determination fluidized-bed layer aspect；Also can be online according to level meter in robot control system(RCS)
Monitoring fluidized-bed layer Plane Location；
(3) stop phase of reactor：For industrial wastewater, wastewater flow rate is influenceed by the production cycle, usually occur stop production, again
The situation of startup；When the system is restarted for crystallization reactor long-play or after stopping transport, each pipeline, pipe fitting easily block,
The characteristics of hardly possible cleaning, there is provided following solution：
1. after reactor is stopped transport, whole waste water and particle to material one-level, two grades of material ponds are vented in reactor immediately；One
Level, two grades of material ponds are not common storage slag bath, its pond hold can accommodate it is full when reactor reaches maximum height fluidized-bed layer
Portion's particle, and aperture plate is provided with pond inner bottom part, bulky grain is trapped to aperture plate, and return of waste water to former pond, fine particle is deposited
In bottom of pond；
2. acid dip pickle is opened, acid solution is injected to reactor, after liquid level of solution does not have overpickling outlet pipeline, open pickling
The circulatory system, pickling is carried out specifically designed for water-locator, and pickle liquor is emptied after 6~12h；
3. after reactor emptying, pickling, you can long-term to stop transport；Because inside reactor is cavity, complex component is had no, must
When wanting, can be manually entered inside reactor carries out more thoroughly cleaning；
The beneficial effects of the utility model are：
(1) the utility model system can be applied to chemicrystallization technique is organic with up-flow multiphase Fenton fluidized-bed process
With reference to method, without adding carrier or nucleus, you can realize insoluble compound Fe (OH)3" large quantities of crystallizations ", and in waterpower
Under shear action, uniform and fine and close crystalline particle is formed.
(2) the utility model system can also obtain the Fe (OH) of higher degree on the basis of efficiently except hardly degraded organic substance3
Crystal grain, realizes recycling sludge, is a kind of environmentally friendly technology, with preferable application prospect.
(3) the utility model system architecture is simple, crystallization reactor simple structure used, and its key reaction segment structure is sky
Chamber, it is both for chemicrystallization creates suitable fluid dynamics condition and easy to maintenance, it is adapted to industrial applications.
Brief description of the drawings
The schematic diagram of the two-stage multiphase Fenton fluidized system that Fig. 1 is used by the utility model embodiment 1.
Fig. 2 is the structural representation of first-stage reactor or second reactor in Fig. 1.
Specific embodiment
In order to be more clearly understood to technical characteristic of the present utility model, purpose and beneficial effect, in conjunction with specific
Embodiment carries out described further below to the technical solution of the utility model, it should be understood that it is new that these examples are merely to illustrate this practicality
Type rather than limitation scope of the present utility model.
Embodiment 1
As shown in figure 1, the utility model provides a kind of two-stage multiphase Fenton fluidized system, wherein：The system includes：One
Stage reactor 1, second reactor 2, hydrogen peroxide throwing device 3 and its dosing pipe 13, ferrous sulfate throwing device 7 and its dosing
Pipeline 17, NaOH throwing device 4 and its dosing pipe 14；The water inlet pipe 15 at intake pump 5 and its place；First-stage reactor
The return line 16 at circulating pump 6 and its place；Connect the delivery port of first-stage reactor and the outlet pipe of second reactor water inlet
Road 11；The circulating pump 8 of second reactor and the return line 18 at place；Second reactor discharge pipeline where two grades of material ponds 9
19；The outlet pipe 12 of second reactor, acid dip pickle 10 and one-level pickling pipeline 20 and two grades of pickling pipelines 21；
As shown in Fig. 2 the first-stage reactor 1 or second reactor 2 are independently of one another：Inner bottom side is provided with water-locator
22, the bottom of the water-locator 22 is water distributing area 23, and the reactor cylinder side wall of the water distributing area is provided with water inlet 30 and circulation
Water out；The top of the water-locator 22 is the cavity 24 for forming fluidized-bed layer, and reactor head periphery is provided with receipts mill weir 26,
The lower section of receipts mill weir 26 is solid-liquid displacement zone 25, the solid-liquid displacement zone 25 and the cavity 24 for forming fluidized-bed layer
Between be provided with ring-type receive water pipe 27；The reactor cylinder side wall of the top of the water-locator 22 is provided with dosing mouth 32 and (only shows in figure
Gone out one), delivery port 33, slag-drip opening 31, pickling feeding opening 34 and circulation water inlet, the delivery port 33 be located at the receipts water
The crest of weir on weir 26；The ring-type is received water pipe 27 and is connected with the circulation water inlet, and the circulation water inlet passes through pipeline 16 or 18
The entrance of circulating pump 6 or 8 is connected to, the circulating water outlet is connected to the outlet of the circulating pump by pipeline 16 or 18；It is described
Water inlet 30 is located at circulating water outlet top, and the dosing mouth 32 is located at the top of the water inlet 30, and the recirculated water enters
Mouth is located at the top of the dosing mouth 32, and the delivery port 33 is located at the recirculated water entrance top；The first-stage reactor 1 or two
Stage reactor 2 is additionally provided with sample tap, the sampling on the reactor cylinder side wall of the top of the water-locator 22 independently of one another
Mouth is connected with probe tube 35, and the sample tap being connected with probe tube 35 is 3, and it is distributed on the recirculated water and enters in vertical direction
Between mouth and the water-locator 22；Reactor solid-liquid displacement zone 25 is additionally provided with dismountable inclined tube (plate) filler 36；The one-level
The water inlet 30 of reactor 1 is connected with water inlet pipe 15, and intake pump 5 is set on the water inlet pipe 15；Circulation water inlet, recirculated water
The pump 6 or 8 for exporting and being connected to the pipeline 16 or 18 between gateway and be arranged on the pipeline constitutes circulation
28；The reactor can also set pickle circulation gateway and connect this in water-locator on the reactor shell of both sides about 22
The connecting line of entrance and the pump being arranged on the pipeline, which constitute the pickling circulatory system 29.
The hydrogen peroxide throwing device 3 and the ferrous sulfate throwing device 7 by pipeline 13,17 respectively with the one-level
The independent dosing mouth of reactor 1 is connected, and the NaOH throwing device 4 passes through pipeline 14 and the second reactor 2
Dosing mouth is connected；The delivery port 33 of the first-stage reactor 1 passes through the water inlet phase of outlet pipeline 11 and the second reactor
Even；
The acid dip pickle 10 is connected by one-level pickling pipeline 20 with the pickling feeding opening of the first-stage reactor, is passed through
Two grades of pickling pipelines 21 are connected with the pickling feeding opening of the second reactor；
The system also includes one-level material pond (not shown) and two grades of material ponds 9, the row of the first-stage reactor 1
Cinder notch is connected (not shown) by discharge pipeline with the one-level material pond, and the slag-drip opening of the second reactor 2 is by row
Mud pipe 19 is connected with two grades of material ponds 9.
The occupation mode of the utility model system can be as described above.
What is finally illustrated is：Above example is merely to illustrate implementation process of the present utility model and feature, and unrestricted
The technical solution of the utility model, although being described in detail to the utility model with reference to above-described embodiment, this area it is general
Logical technical staff should be understood：The utility model can still be modified or equivalent, it is new without deviating from this practicality
Any modification or partial replacement of the spirit and scope of type, all should cover in the middle of protection domain of the present utility model.
Claims (10)
1. a kind of two-stage multiphase Fenton fluidized system, it is characterised in that：The system includes：First-stage reactor, second reactor,
Hydrogen peroxide throwing device, ferrous sulfate throwing device and NaOH throwing device；
The first-stage reactor or second reactor are independently of one another：Inner bottom side is provided with water-locator, and the water-locator bottom is
Water distributing area, the reactor cylinder side wall of the water distributing area is provided with water inlet and circulating water outlet；The water-locator top is use
In the cavity for forming fluidized-bed layer, reactor head periphery is provided with receipts mill weir, and the receipts mill weir lower section is solid-liquid displacement zone, described
Receipts water pipe is provided between solid-liquid displacement zone and the cavity for forming fluidized-bed layer；Reactor cylinder above the water-locator
Body sidewall is provided with dosing mouth, delivery port and circulation water inlet, and the delivery port is located at the crest of weir of the receipts mill weir；The receipts water
Pipe is connected with the circulation water inlet, and the circulation water inlet is connected to the entrance of circulating pump by pipeline, and the recirculated water goes out
Mouth is connected to the outlet of the circulating pump by pipeline；
The hydrogen peroxide throwing device and the ferrous sulfate throwing device are only with the first-stage reactor respectively by pipeline
Vertical dosing mouth is connected, and the NaOH throwing device is connected by pipeline with the dosing mouth of the second reactor；It is described
The delivery port of first-stage reactor is connected by pipeline with the water inlet of the second reactor.
2. two-stage multiphase Fenton fluidized system according to claim 1, it is characterised in that：The receipts water pipe is received for ring-type
Water pipe.
3. two-stage multiphase Fenton fluidized system according to claim 1, it is characterised in that：The system also includes pickling
On device, the first-stage reactor or second reactor reactor cylinder side wall independently of one another above the water-locator also
Pickling feeding opening is provided with, the acid dip pickle enters medicine by pipeline with the pickling of the first-stage reactor and/or second reactor
Mouth is connected.
4. two-stage multiphase Fenton fluidized system according to claim 1, it is characterised in that：The water inlet is located at described
Circulating water outlet top, the dosing mouth is located at water inlet top, and the circulation water inlet is located at dosing mouth top,
The delivery port is located at the recirculated water entrance top.
5. two-stage multiphase Fenton fluidized system according to claim 1, it is characterised in that：The first-stage reactor or two
Slag-drip opening is additionally provided with stage reactor reactor cylinder side wall independently of one another above the water-locator.
6. two-stage multiphase Fenton fluidized system according to claim 5, it is characterised in that：The system also includes one-level
Material pond and two grades of material ponds, the slag-drip opening of the first-stage reactor are connected by pipeline with the one-level material pond, and described two
The slag-drip opening of stage reactor is connected by pipeline with two grades of material ponds.
7. the two-stage multiphase Fenton fluidized system according to any one of claim 1~6, it is characterised in that：Described one
Sampling is additionally provided with stage reactor or second reactor reactor cylinder side wall independently of one another above the water-locator
Mouthful, the sample tap is connected with probe tube.
8. two-stage multiphase Fenton fluidized system according to claim 7, it is characterised in that：The sampling being connected with probe tube
Mouth is 3~4, and it is distributed between the circulation water inlet and the water-locator in vertical direction.
9. two-stage multiphase Fenton fluidized system according to claim 1, it is characterised in that：The first-stage reactor or two
Stage reactor sets up dismountable inclined tube filler in the solid-liquid displacement zone independently of one another.
10. two-stage multiphase Fenton fluidized system according to claim 1, it is characterised in that：The first-stage reactor
Water inlet is connected with water inlet pipe, and pump is set on the water inlet pipe.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115367855A (en) * | 2022-09-14 | 2022-11-22 | 中南大学 | Process for treating fluorine-containing wastewater and recovering high-purity calcium fluoride |
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2016
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115367855A (en) * | 2022-09-14 | 2022-11-22 | 中南大学 | Process for treating fluorine-containing wastewater and recovering high-purity calcium fluoride |
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