CN107311345A - A kind of waste acidity recovery method and apparatus - Google Patents
A kind of waste acidity recovery method and apparatus Download PDFInfo
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- CN107311345A CN107311345A CN201710629752.8A CN201710629752A CN107311345A CN 107311345 A CN107311345 A CN 107311345A CN 201710629752 A CN201710629752 A CN 201710629752A CN 107311345 A CN107311345 A CN 107311345A
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- 238000011084 recovery Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000002699 waste material Substances 0.000 title claims abstract description 35
- 239000011347 resin Substances 0.000 claims abstract description 152
- 229920005989 resin Polymers 0.000 claims abstract description 152
- 239000002253 acid Substances 0.000 claims abstract description 141
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 239000002351 wastewater Substances 0.000 claims abstract description 15
- 239000012798 spherical particle Substances 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 150000007522 mineralic acids Chemical class 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 230000008929 regeneration Effects 0.000 claims description 5
- 238000011069 regeneration method Methods 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 230000002411 adverse Effects 0.000 claims description 3
- 239000008237 rinsing water Substances 0.000 claims description 3
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims description 2
- 239000010962 carbon steel Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 238000004132 cross linking Methods 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims description 2
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 16
- 239000002184 metal Substances 0.000 abstract description 16
- 150000003839 salts Chemical class 0.000 abstract description 16
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000002245 particle Substances 0.000 description 20
- 239000000243 solution Substances 0.000 description 17
- 238000007789 sealing Methods 0.000 description 4
- 239000003957 anion exchange resin Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000021110 pickles Nutrition 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000004965 peroxy acids Chemical class 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The present invention relates to waste acidity recovery reutilization technology field, in particular to a kind of waste acidity recovery method and apparatus.Methods described enters spent acid equipped with sour absorption is carried out in the resin tank body for inhaling acid resin through entering sour pump supercharging after filtering, and the waste water of saliferous not to be adsorbed drains into wastewater collection pond through delivery port；The resin tank body height≤500mm, the resin filled is spherical particle resin.The method that the present invention is provided is with the obvious advantage in terms of waste acidity recovery, it is small with floor space, it is easy to operate, acid recovering rate is 95%, recovery acid concentrations versus has a certain degree of concentration in former spent acid free acid concentration, spent acid free acid concentration can be concentrated to 20%~30% in 10%~15% obtained pure acid of concentration, and the pure sour metal salt residual quantity of gained can meet the application of enterprise below 1 g/l.
Description
Technical field
The present invention relates to waste acidity recovery reutilization technology field, in particular to a kind of waste acidity recovery method and apparatus.
Background technology
Because metallic article has the advantages that a lot in use, the metallic article of difference in functionality is largely manufactured, and should
In life for industrial production and people, and often made a return journey in metal finish industry with strong inorganic acid (sulfuric acid, nitric acid, hydrochloric acid)
Except the oxide on surface with reduce to subsequent production operate influence.Largely these oxides are dissolved by acid,
And as the concentration of the increase free acid of the metal concentration of dissolving is also accordingly reduced.Although can by way of adding eo-acid come
Increase the concentration of acid, but when metal concentration increase, oxide removal efficiency would generally be reduced, when oxide skin is no longer filled
When dividing removal, these acid solutions, which must just be done, scraps processing.If directly discharged spent acid, serious environment can be caused dirty
Dye, wastes resource, so typically can all be recycled to spent acid.Traditional waste acidity recovery method has：Neutralisation, spray
Mist roasting method, diffusive dialysis method, extraction and condensing crystallizing method, in recent years, recent studies on have gone out a kind of environmental protection, the spent acid of energy-conservation
Recovery method, i.e. acid block technique.Acid block technique is a kind of based on strong-base anion-exchange resin nonionic exchange adsorption
Strong acid, without adsorbing corresponding salt, so as to realize the technology that the purpose for reaching waste acid recovery is separated between acid and salt.Acid retardance skill
Art waste acid recovery is in addition to water, it is not necessary to any chemical reagent, has adsorbed the resin bed of strong acid, it is only necessary to which being rinsed with water can be real
The elution and resin regeneration of existing acid.
The existing apparatus structure for acid block technique is more complicated, and floor space is big, also exist resin easily by
Pollute and scrap, the rate of recovery of acid is low, recovery acid impurity is more, the recovery low problem of acid concentration, the recycling effect of spent acid compared with
Difference.
In view of this, it is special to propose the present invention.
The content of the invention
It is above-mentioned to solve it is an object of the invention to provide a kind of waste acidity recovery method and the equipment of implementation methods described
Problem.
In order to realize the above-mentioned purpose of the present invention, spy uses following technical scheme：
According to an aspect of the present invention, the present invention relates to a kind of waste acidity recovery method, by spent acid after filtering through entering sour pump
Supercharging drains into useless into the waste water equipped with the sour absorption of progress in the resin tank body for inhaling acid resin, saliferous not to be adsorbed through delivery port
Water collecting pit；
The resin tank body height≤500mm, the suction acid resin is spherical particle resin.
The method that the present invention is provided is with the obvious advantage in terms of waste acidity recovery, small with floor space, easy to operate, acid recovering rate
95%, recovery acid concentrations versus has a certain degree of concentration in former spent acid free acid concentration, and spent acid free acid concentration is 10%
The pure acid that~15% concentration is obtained can be concentrated to 20%~30%, the pure sour metal salt residual quantity of gained 1 g/l with
Under, the application of enterprise can be met.
The invention further relates to implement the acid recovery plant of method as described above,
Including the coarse filtration pump being sequentially connected with, coarse filter, fine filter, raw material acid tank, enter sour pump, filled with described
Inhale the resin tank body and wastewater collection pond of acid resin；
The feed end of the resin tank body is also associated with recovery acid tank；
The discharge end of the resin tank body is also associated with rinsing water pot.
Compared with prior art, beneficial effects of the present invention are：
1), the application of fine resin particles, adds the specific surface area of unit volume, improves kinetics；And it is right
Resin particle has done the pretreatment work of salt bubble compacting, greatly reduces the space between resin and tank body between resin particle,
Spent acid residual quantity is extremely low, it is ensured that the degree of purity of cleaning acid；
2), the application of short resin bed, reduces pressure drop and equipment size；Optimize the water distributor structure of resin container, very big
Cross-sectional area under meet water distribution uniformity, to solve the problem of trundle bed resin water distribution is uneven, realize high efficiente callback；
3), the design of fixing resin bed, reduces raffinate amount as far as possible, reduces the recovery time, improves recovery acid purity and concentration；
4), the mode of adverse current water inlet, improves the chemical efficiency of charging and regeneration step to greatest extent.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
The schematic diagram for the acid recovery plant that Fig. 1 provides for the present invention；
Fig. 2 is the resin tank body structural representation of flange sealing structure of the present invention.
Reference：
Coarse filtration pump 1., coarse filter 2., fine filter 3., raw material acid tank 4., enter sour pump 5., acid inlet valve 6., recovery acid
Valve 7., recovery acid tank 8., resin tank body 9., waste liquid blowoff valve 10., water intaking valveRinse water potFlushing pumpWastewater collection
Pond
Embodiment
Often the oxide on surface is removed in metal finish industry with strong inorganic acid (sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid)
To reduce the influence operated to subsequent production.Largely these oxides are dissolved by acid, and with dissolving
The concentration of the increase free acid of metal concentration is also accordingly reduced.Although the concentration of acid can be increased by way of adding eo-acid,
But when metal concentration increase, oxide removal efficiency would generally be reduced, when oxide skin is no longer sufficiently removed,
These acid solutions, which must just be done, scraps processing.The present invention can reach free acid and metal using the free acid in resin waste acid recovery
The purpose of salt separation, and can slightly be lifted in the concentration of former spent acid, increase the benefit of enterprise, reduction sewage disposal into
This.
Specifically, the present invention relates to a kind of waste acidity recovery method, spent acid is equipped with through entering sour pump supercharging entrance after filtering
Inhale and sour absorption is carried out in the resin tank body of acid resin, the waste water of saliferous not to be adsorbed drains into wastewater collection pond through delivery port；
The resin tank body height≤500mm, the resin filled is spherical particle resin.
It is preferred that, the resin tank body is highly 100mm~450mm；Or 200mm~400mm；300mm can also be selected.
In the prior art, resin tank body is too high, and 1000mm resin tank body can cause spent acid during acid retardance
The rate of recovery declines, and the rate of recovery is 80% or so.The present invention uses trundle bed technology and realizes high efficiente callback.
It is preferred that, waste acidity recovery method as described above, the method that the resin tank body is filled in the resin tank body
Including：
After the full resin tank body of particulate resin filling, 2h is soaked with 8wt%~12wt% sodium chloride solution
Then~3h, resin fills up resin tank body again in tank body contract with new resin, then cleans with clear water resin tank body.
Current this area resin process does spent acid processing and uses strong-base anion-exchange resin, the particle diameter model of resin
Enclose space between 0.3mm~1.2mm, resin particle bigger than normal, and resin is all directly to fill up, after spent acid enters resin system
Due to the environment of peracid high metal salt, resin particle has contraction, and it is residual to have substantial amounts of spent acid in resin container body before washing
Liquid, this causes to clean obtained acid solution degree of purity not enough, and metal salt concentration is at 10 g/l.This technique uses fine granular resin,
Particle size range has done the pretreatment work of salt bubble compacting in 0.1mm~0.3mm, greatly reduce between resin particle and
Space between resin and tank body, spent acid residual quantity is extremely low, it is ensured that the degree of purity of cleaning acid；
It is preferred that, waste acidity recovery method as described above, the spherical particle resin is crosslinked polystyrene.
It is preferred that, waste acidity recovery method as described above, the granularity of the spherical particle resin is 0.1mm~0.3mm, more
Preferably 0.15mm~0.25mm, or 0.2mm.
It is preferred that, waste acidity recovery method as described above, the resin tank body is counter fixed bed；
It is furthermore preferred that spent acid is entered equipped with progress acid in the resin tank body for inhaling acid resin through entering sour pump supercharging after filtering
During absorption, spent acid adverse current is pumped into the resin tank body；When cleaning resin progress resin regeneration, water enters in the way of following current is intake
Enter the resin tank body.
It is preferred that, waste acidity recovery method as described above, precision≤1 μm of the filtering, more preferably 0.1 μm~1 μm,
Or 0.5 μm.
Technique front end uses high-efficiency filtration systems, and filtering accuracy maintains less than 1 micron, it is ensured that resin system it is efficient
Operation, resin type selecting is preferably Tulsion A-853E, and particle size range 0.1nm~0.3mm, resin framework is crosslinking polyphenyl second
The resin particle diameter of alkene, far smaller than home equipment, and the applicable hydrochloric acid of application of this resin balls, sulfuric acid, nitric acid, hydrofluoric acid or
The recovery of its nitration mixture.Resin parameter is as follows：
| Type | Strong basic type anion-exchange resin |
| Framework | Crosslinked polystyrene |
| Ionic formses | Chlorine type |
| Physics pattern | Moisten spherical particle |
| Granularity | 0.1-0.3mm |
| Exchange capacity | 1.3meq/ml |
| Backwash stable density | 690-720g/l |
| Maximum operating temp | 60℃ |
| Dissolubility | Insoluble in any organic solvent |
The processing request of resin tank body is highly less than 500mm, is processed in acid recovery resin tank body, and resin is filled into full
Afterwards, resin is soaked with 10% sodium chloride solution, then soak time 2~3 hours, resin uses new resin in tank body contract
Again resin tank body is filled up.The principle of this technique for applying is, resin balls retardance free acid, will not adsorbing metal ions, but by
Gap is had between resin balls and ball and between resin balls and tank body, clearance space can remain acid pickle, and in acid pickle
Metal salt concentration is very high, can so influence the sour degree of purity for washing, and it is to obtain acid solution to improve that gap is reduced as far as possible
Degree of purity, just can farthest reduce resin balls and ball and resin balls by way of saline sook and again supplemental tree fat
Gap between tank body.Such result can ensure not have a large amount of residuals of spent acid during spent acid is entered, in resin
The acid solution degree of purity obtained during the saturation cleaning of absorption acid solution is very high, and acid solution metal salt residual quantity is below 1 g/l, punching
Wash water is less, and acid solution has concentrated effect, it is ensured that acid solution will not excessive buildup.
It is preferred that, waste acidity recovery method as described above, the resin tank body uses flange sealing structure；It is furthermore preferred that
Water distribution through hole is provided with the upper lower flange of the resin tank body；Water distribution through hole be provided with it is multiple, for spent acid processing and
Water distribution uniformity during resin regeneration, it is contemplated that technology difficulty and water distribution efficiency, the aperture of through hole preferably is 2mm~3mm；Due to logical
The aperture in hole is more than the particle diameter of the spherical resin particle, therefore it is furthermore preferred that the upper and lower surface of the ring flange is additionally provided with
Filter plate and/or filter cloth, the aperture of the filter plate and/or filter cloth are less than the particle diameter of resin particle, more preferably≤0.08mm；It is more excellent
Choosing, filter plate and/or the selection of filter cloth material of resistance to sour.
It is furthermore preferred that the flange sealing structure be selected from slip-on-welding plate flange, hubbed clip-on-welding flange, band neck W.N flange,
Integral (type) flange, socket welding flange, screwed flange, blank flange.
Flange, or ring flange, it is intended that the symmetrical plate-like knot used in connecting pipe, container or fixing axle class mechanical part
Structure, generally has bolt, helicitic texture as a means of fixation.
This technique uses flange sealing structure (its schematic diagram is as shown in Figure 2), and resin is close by resin tank body after filling up again
Envelope, the salt solution then entered by cleaning pump in pure water cleaning resin bed, resin is washed away rear resin particle and loses salt expansion to resin
Tank body shell wall and up and down top cover have a certain pressure, and such resin is at highly desirable filling up compaction state in tank body.By
The resin particle diameter used in this technique is far smaller than the resin particle diameter that prior art acid recovery system is used, and has cooked salt bubble
The space filled up between the processing of compacting, resin particle can be minimum, and resin particle does not have unfilled in resin container body
Clearance spaces, such result can ensure not have a large amount of residuals of spent acid during spent acid is entered, in resin adsorption acid solution
Obtained acid solution degree of purity is very high during saturation is cleaned, acid solution metal salt residual quantity below 1 g/l,
It is preferred that, waste acidity recovery method as described above, the spent acid is the waste liquid containing strong inorganic acid；
It is furthermore preferred that the strong inorganic acid includes the one or more in sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid.
Technical scheme is clearly and completely described below in conjunction with the drawings and specific embodiments, but
Be it will be understood to those of skill in the art that following described embodiment is a part of embodiment of the invention, it is rather than whole
Embodiment, is merely to illustrate the present invention, and is not construed as limiting the scope of the present invention.Based on the embodiment in the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained under the premise of creative work is not made, belongs to guarantor of the present invention
The scope of shield.Unreceipted actual conditions person in embodiment, the condition advised according to normal condition or manufacturer is carried out.Agents useful for same
Or the unreceipted production firm person of instrument, it is the conventional products that can be obtained by commercially available purchase.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
As shown in figure 1, the acid recovery plant for the implementation method as described above that the present invention is provided, including be sequentially connected with it is thick
Filter pump 1., coarse filter 2., fine filter 3., raw material acid tank 4., enter the resin of sour pump 5., filled with described suction acid resin
9. and wastewater collection pond tank body
8. the feed end of the resin tank body 9. is also associated with recovery acid tank；
The discharge end of the resin tank body 9. is also associated with rinsing water pot
It is preferred that, acid recovery plant as described above, it is described enter sour pump 5. with the resin tank body 9. between be provided with
Acid inlet valve is 6.；
The resin tank body 9. with the wastewater collection pondBetween be provided with waste liquid blowoff valve 10.；
The resin tank body 9. with the recovery acid tank 8. between be provided with recovery acid valve 7.；
The resin tank body 9. with the flushing water potBetween be provided with water intaking valve
It is preferred that, acid recovery plant as described above, the coarse filter 2., fine filter 3., raw material acid tank 4., tree
Fat tank body 9., recovery acid tank 8. in one or more devices case material be the acidproof material of anti-corrosion；More preferably carbon steel adds
The material of corrosion-proof lining, and/or fiberglass.
It is preferred that, acid recovery plant as described above, the flushing water potWith the resin tank body 9. between also set up
There is flushing pump
As shown in figure 1, the equipment that provides of the present invention operationally the step of it is as follows：Open acid inlet valve 6. with blowoff valve 10.
Valve, recovery acid valve 7. and water intaking valveValve close after, spent acid after 1. coarse filtration pump is pressurized enter coarse filter 2.
Filtration treatment is 3. done with fine filter, the filtering accuracy of fine filter 3. is at 1 μm or so, and 3. water outlet enters raw material acid to fine filter
4., 4. middle spent acid spent acid after entering sour pump and being 5. pressurized enters resin tank body 9. resin to raw material acid tank to tank in the way of countercurrently intaking
9. the system of subject of recovery acid, resin tank body is adsorbed onto free acid on resin, and the waste water containing metal salt is drained into through delivery port
Wastewater collection pond6. and 10. 1. and 5. this process cut off within 10~20 minutes and close valve, then opens recovery acid valve 7.
And water intaking valveStart flushing pumpWater pot will be rinsedIn clear water be delivered to by increase in resin tank body, entered with following current
The mode of water cleans resin bed, and 8. 7. pure acid solution be delivered to recovery acid tank by valve, this process progress 3~7 minutes, then
Process before repeating continues into spent acid.
This technique is using the full bed technique of trundle bed, and height of bed maximum control is in 500mm, and resin uses fine granular resin particle
Footpath farthest reduces raffinate amount in 0.1~0.3mm, the application of this technique, it is ensured that the pure sour degree of purity (metal of cleaning gained
Salt remains less than 1 g/l), and free acid the rate of recovery (95%), the pre-filtering technique of front end reached that high filtering is smart
Degree, can meet the permanently effective operation of resin system, and the size of equipment can be determined according to specific spent acid amount, meet enterprise
The application of industry.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, but it will be understood by those within the art that：Its
The technical scheme described in foregoing embodiments can still be modified, or to which part or all technical characteristic
Carry out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention skill
The scope of art scheme.
Claims (10)
1. a kind of waste acidity recovery method, it is characterised in that enter spent acid equipped with suction acid resin through entering sour pump supercharging after filtering
Resin tank body in carry out sour absorption, the waste water of saliferous not to be adsorbed drains into wastewater collection pond through delivery port；
The resin tank body height≤500mm, the suction acid resin is spherical particle resin.
2. waste acidity recovery method according to claim 1, it is characterised in that the suction acid resin is filled in the resin
The method of tank body includes：
After the full resin tank body of particulate resin filling, 2h~3h is soaked with 8wt%~12wt% sodium chloride solution,
Then resin fills up resin tank body again in tank body contract with new resin, then cleans with clear water suction acid resin.
3. waste acidity recovery method according to claim 1, it is characterised in that the spherical particle resin is crosslinking polyphenyl second
Alkene.
4. waste acidity recovery method according to claim 1, it is characterised in that the granularity of the spherical particle resin is
0.1mm~0.3mm.
5. waste acidity recovery method according to claim 1, it is characterised in that the resin tank body is fixed for counter
Bed；
It is preferred that, spent acid is entered equipped with the sour absorption of progress in the resin tank body for inhaling acid resin through entering sour pump supercharging after filtering
When, spent acid adverse current is pumped into the resin tank body；When cleaning resin progress resin regeneration, water enters institute in the way of following current is intake
State resin tank body.
6. waste acidity recovery method according to claim 1, it is characterised in that precision≤1 μm of the filtering.
7. waste acidity recovery method according to claim 1, it is characterised in that the resin tank body uses flange seal knot
Structure；
It is preferred that, it is provided with water distribution through hole on the upper lower flange of the resin tank body；
It is furthermore preferred that the upper and lower surface of the ring flange is additionally provided with filter plate and/or filter cloth.
8. waste acidity recovery method according to claim 1, it is characterised in that the spent acid is useless containing strong inorganic acid
Liquid；
It is preferred that, the strong inorganic acid includes the one or more in sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid.
9. implement the acid recovery plant of any one of claim 1~8 methods described, it is characterised in that including what is be sequentially connected with
Coarse filtration pump, coarse filter, fine filter, raw material acid tank, enter sour pump, the resin tank body filled with described suction acid resin and
Wastewater collection pond；
The feed end of the resin tank body is also associated with recovery acid tank；
The discharge end of the resin tank body is also associated with rinsing water pot；
It is preferred that, it is described to enter to be provided with acid inlet valve between sour pump and the resin tank body；
Waste liquid blowoff valve is provided between the resin tank body and the wastewater collection pond；
Recovery acid valve is provided between the resin tank body and the recovery acid tank；
Water intaking valve is provided between the resin tank body and the flushing water pot；
It is furthermore preferred that being additionally provided with flushing pump between the flushing water pot and the resin tank body.
10. acid recovery plant according to claim 9, it is characterised in that the coarse filter, fine filter, raw material
The case material of one or more devices in sour tank, resin tank body, recovery acid tank is the acidproof material of anti-corrosion；More preferably carbon steel
Plus the material of corrosion-proof lining, and/or fiberglass.
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| CN116655191A (en) * | 2023-07-26 | 2023-08-29 | 杭州永洁达净化科技有限公司 | Zero-emission recovery method and recovery system for aluminum foil waste acid |
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Application publication date: 20171103 |