CN202144469U - Waste acid recovery device - Google Patents
Waste acid recovery device Download PDFInfo
- Publication number
- CN202144469U CN202144469U CN201120273412U CN201120273412U CN202144469U CN 202144469 U CN202144469 U CN 202144469U CN 201120273412 U CN201120273412 U CN 201120273412U CN 201120273412 U CN201120273412 U CN 201120273412U CN 202144469 U CN202144469 U CN 202144469U
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- CN
- China
- Prior art keywords
- waste acid
- acid
- pipe
- membrane assembly
- hyperfiltration membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The utility model discloses a waste acid recovery device which belongs to the technical field of water treatment and comprises a waste acid tank and a pretreatment ultrafiltration membrane module that is vertically installed, wherein the pretreatment ultrafiltration membrane module is connected with a penetrant drain pipe, the lower part of the pretreatment ultrafiltration membrane module is connected with a feeding pipe, the upper part of the pretreatment ultrafiltration membrane module is connected with a concentrated liquid drain pipe, the other end of the pretreatment ultrafiltration membrane module is communicated with the waste acid tank, and the feeding pipe is provided with a gas-liquid mixing power device. The waste acid recovery device has the advantages of extremely low operating cost, low energy consumption, strong maneuverability, good effluent quality, small waste acid recovery volume, high concentration and the like, and the pretreatment and post-treatment ultrafiltration membrane modules and a dialysis membrane all can stably run for a long time, so as to provide guarantee for the service life of the membrane and the working efficiency of a whole recovery system. More importantly, the waste acid recovery device can be used for recovering acid, water and iron ions in waste acid respectively, thus realizing resource utilization of the waste acid, and having broad market prospect.
Description
Technical field
The utility model belongs to water-treatment technology field, is specifically related to a kind of acid-restoring plant.
Background technology
The steel members blank electroplating surface, the spraying last as all will through overpickling with remove the surface oxide compound, produce a large amount of spent pickle liquors simultaneously.The workpiece kind is different with processing request, and the requirement of pickle solution also is not quite similar, and wherein cleans the most common with hydrochloric acid.Hydrochloric acid cleans in the waste liquid and mainly contains Fe
2+, H
+And Cl
-Ion exists a certain amount of greasy dirt and suspended substances such as silica flour, carbon element in addition.Just do not handle directly discharging if these spent pickle liquors do not add, not only waste resource, also can bring serious environmental to pollute.
To the Iron And Steel Industry spent pickle liquor, present processing mode mainly contains crystallisation by cooling method, evaporative crystallization method, torch firing decomposition method, ion exchange method, solvent extration, neutralisation, dialysis etc.But problems such as these processing mode ubiquities are invested and running cost is high, treatment effect is undesirable; Wherein methods such as crystallisation by cooling method, evaporative crystallization method, torch firing decomposition method also have defectives such as energy consumption height, maintenance of the equipment difficulty, also can produce large quantity of exhaust gas and waste residue simultaneously; Ion exchange method and dialysis operation stability are poor, and recovered acid is not thorough; Solvent extration and neutralisation need consume a large amount of chemical reagent, bring secondary pollution easily.
It is thus clear that traditional spent acid processing mode can not satisfy the policy requirements of country's " recycling economy ", market presses for the novel waste s.t. technology that investment is little, the recovery is high, the recovered acid volume is little, working cost is low.
Summary of the invention
The purpose of the utility model aims to provide a kind of acid-restoring plant.
Based on above-mentioned purpose; The utility model has been taked following technical scheme: a kind of acid-restoring plant; Comprise spent acid groove and the vertical pre-treatment hyperfiltration membrane assembly of installing, be connected with the penetrating fluid vent pipe on the pre-treatment hyperfiltration membrane assembly, and the bottom is connected with feed-pipe, top is connected with the liquid concentrator vent pipe; The other end of pre-treatment hyperfiltration membrane assembly feed-pipe is communicated with the spent acid groove, and this feed-pipe is provided with the gas-liquid mixed PWR PLT.
The other end of said pre-treatment hyperfiltration membrane assembly liquid concentrator vent pipe inserts in the spent acid groove.
Said device also comprises buffer memory groove and dialyzer, and the other end of pre-treatment hyperfiltration membrane assembly penetrating fluid vent pipe inserts in the buffer memory groove, and the buffer memory groove is communicated with the opening for feed of dialyzer through pipeline, and this connecting pipe is provided with the gas-liquid mixed PWR PLT.
The raffinate outlet of said dialyzer links to each other with aeration tank, settling tank, solid-liquid separator and aftertreatment hyperfiltration membrane assembly successively, and the water outlet of solid-liquid separator is communicated with the feed-pipe of aftertreatment hyperfiltration membrane assembly, and this feed-pipe is provided with the gas-liquid mixed PWR PLT; The liquid concentrator vent pipe of aftertreatment hyperfiltration membrane assembly returns settling tank and inserts wherein.
The other end of the penetrating fluid vent pipe of aftertreatment hyperfiltration membrane assembly links to each other with the reception liquid of dialyzer inlet.
The acid-restoring plant of the utility model utilizes ultra-filtration membrane air supporting that spent acid is carried out pre-treatment; Can guarantee that hyperfiltration membrane assembly is long-term, effectively remove colloid in the spent acid in the steady running, suspended substances such as greasy dirt and a large amount of silica flour, carbon element: spent acid carries a large amount of microbubbles and gets into hyperfiltration membrane assemblies; Suspended substances such as the greasy dirt in the spent acid, colloid and silica flour, carbon element stick on the microbubble and behind membrane sepn, are taken out of membrane module by microbubble, have effectively prevented the pollution on film surface; Simultaneously, microbubble purges the film surface constantly, has also played the effect on lasting purification membrane surface.Membrane process is introduced in air supporting, thoroughly overcome the defective that membrane module is prone to stop up and clean difficulty, kept that membrane separation technique is efficient, energy-saving and environmental protection, facility compact, process are simple, be easy to advantage such as control, for the later stage recovering waste acid has been paved road.
Utilize the ultra-filtration membrane air-float purification to handle spent acid is carried out pre-treatment; Can the ferrous ion in the spent acid be converted into ferric ion; No matter later stage is to adopt dialysis or adopt traditional heating roasting method to reclaim spent acid, can improve the working efficiency of the clearance and the equipment of iron ion.
Shandong sodium method now has in the world comparatively widely and uses as the representative in the roasting method.The Shandong roughly flow process of sodium method now is: spent acid at the preconcentrator internal heating, is concentrated the back with being pumped into the stoving oven top, make it be vaporific and spray in the stove; Atomizing spent acid decomposes in stove generates hydrogen chloride gas and powdery red stone; Red stone is discharged from furnace bottom; Hydrogenchloride reaches preconcentrator from furnace roof through double-cyclone dust collector with combustion gases, and the gas after double-cyclone dust collector, preconcentrator purify postcooling gets into the bottom, absorption tower from preconcentrator; Hydrogen chloride in gas is absorbed by the washing water from the cat head ejection, at the bottom of tower, forms regenerating acid, and the tail gas of cat head is taken away through chimney by blower fan and discharged.
Though Shandong sodium method principle now is simple; But its road in the popularization of China is not smooth; Investment is big, energy consumption is high, maintenance of the equipment is difficult except that having, be prone to produce in the operational process the shortcoming such as waste gas waste residue, and shower nozzle should stop up in the torch firing process, the treatment effect instability also is the important factor that influences its popularization.In the actual production, spent acid is not the ideal system of a stable homogeneous, except that cl ions, iron ion, also has a large amount of other impurity in the system, such as silica flour, carbon element etc.If spent acid is not carried out suitable pre-treatment, will certainly the frequent jams shower nozzle during torch firing, influence organic efficiency and effect.If adopt ultra-filtration membrane air supporting in advance spent acid to be carried out pre-treatment, not only can remove the stifled impurity that is prone in the spent acid in time, effectively, help Shandong carrying out smoothly of sodium method now.
Dialysis is a kind of in addition spent acid recovery method comparatively commonly used.Dialyzer externally has four interfaces usually; Be opening for feed, reception liquid inlet, dialyzate outlet and raffinate outlet: spent acid and reception liquid (clear water; The general tap water that uses) respectively after opening for feed, acceptable solution inlet get into dialyzer in two side flow of dialyzer, under the promotion of concentration difference, the Cl-in the waste acid water passes dialyzer and gets in the acceptable solution; In order to keep electroneutral, Cl-can carry equimolar positively charged ion and get into acceptable solution together in migration simultaneously.Because Fe in the spent acid
2+Travelling speed in the film inner duct is more than H
+Little, macroscopical result of formation is: HCl is moved to and is formed recovered acid in the acceptable solution, and the pH value of spent acid one side (residue wastewater) constantly raises, and is trapped in the Fe in the spent acid
2+Along with gradating, the rising of pH value is Fe
3+But in the practice, also contain a large amount of greasy dirts and PM for particulate matters such as silica flour, carbon element in the spent acid, if directly that such composition is complicated spent acid feeds dialyzer, have more than is needed dialyzer that how long will make stops up, and makes whole spent acid treatment system paralysis.This has become the major obstacles that hinders existing dialysis industry popularization., spent acid utilize ultra-filtration membrane air supporting that spent acid is carried out pre-treatment before getting into dialyzer; Can play the effect of the following aspects: 1) remove greasy dirt and other PM for particulate matters in the spent acid; Like silica flour, carbon element, bacterium etc.; Improved the influent quality of back segment dialyzer, for dialyzer continues, steady operation provides guarantee; Simultaneously, compare with ultrafiltration, ultra-filtration membrane air supporting can guarantee membrane module operation steady in a long-term, can not influence the working efficiency of whole waste acid recovery system because of pre-treatment.Dissolve in a large amount of air in the spent acid when 2) the ultra-filtration membrane air-float purification is handled, be equivalent to spent acid has been carried out the aeration processing, can impel the Fe in the spent acid
2+Be converted into Fe
3+, hydrated radius improves, and is trapped more easily and separates with HCl in the dialysis stage, even be converted into Fe (OH)
3From spent acid, separate out.3) spent acid is played certain inspissated, helped to improve the concentration of dialysis recovered acid.
The utility model adopts dialysis to come recovered acid, and has also added air supporting in the dialysis stage after utilizing the ultra-filtration membrane air-float purification that spent acid is carried out pre-treatment, and this more helps Fe
2+To Fe
3+Transform.In addition, air supporting can prevent that equally pollutent from the dialyzer surface attachment, keep clean the dialyzer surface, has guaranteed the operation stability of dialyzer.Dialysis constantly reduces the acid in the residue wastewater, and the pH value raises; When pH value reaches 3 when above, just have lot of F e (OH)
3Separate out.And in the utility model, the pH value of residue wastewater can reach about 6, near neutral, has reduced the alkali number that adds in later stage significantly.And the concentration of recovered acid reaches as high as 17%, and volume is also very little, can directly return to be made into pickle solution in the complex acid groove and to recycle.
Further residue wastewater is carried out aeration after the dialysis, impel Fe
2+Be converted into Fe
3+, residue wastewater finally is converted into the yellow mud water that is dispersed with a large amount of ironic hydroxides.For making Fe
2+Oxidation to carry out ground more thorough, can in the aeration tank, add small amounts of sodium hydroxide and regulate pH value to 7-8.Behind the aeration residue wastewater squeezed in the settling tank and precipitate, be oxidizing reaction and Fe (OH)
3Crystalline is grown, is separated out the competent time that provides.Thereafter through solid-liquid separation, isolated body refuse composition nearly all is Fe (OH)
3, purity can reach 99%, is fed in the market and can increases extra income for enterprise as sub product.After the solid-liquid separation, also can contain a spot of Fe (OH) in the liquid phase
3, utilize ultra-filtration membrane air supporting once more it to be carried out purifying treatment, water outlet (penetrating fluid) is qualified discharge directly, or uses as the reception liquid of dialyzer, and liquid concentrator (air water mixed solution) then returns makes circular treatment in the settling tank.
Generally speaking; The acid-restoring plant of the utility model has that working cost is extremely low, energy consumption is low, workable, advantages such as effluent quality good, the spent acid recovery volume is little, concentration height; Pre-treatment and aftertreatment hyperfiltration membrane assembly and dialyzer can both long-time steady operations, for the working efficiency of membrane lifetime and whole recovery system provides guarantee.The more important thing is that this device can reclaim acid, water and iron ion in the spent acid respectively, has realized the recycling of spent acid, thereby has had vast market prospect.Outside the demineralizing acid type iron and steel pickling waste liquid, the Application Areas of the utility model can also be extended to industries such as titanium white production, wet type copper smelting, and the kind of recovered acid can comprise H
2SO
4, HCl, HF, HNO
3, CH
3COOH, H
3PO
4Deng, the metals ion that relates to comprises transition metal ion, rare earth ion and magnesium calcium etc.Can also be used to contain the purification separation processing of metal-salt waste water, like the corrosive fluid liquid waste disposal (iron trichloride) of PC board.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with specific embodiment the utility model is described further.
A kind of acid-restoring plant, as shown in Figure 2, comprise spent acid groove 3, pre-treatment hyperfiltration membrane assembly 4, buffer memory groove 5, dialyzer 6, aeration tank 7, settling tank 8, solid-liquid separator 9 and aftertreatment hyperfiltration membrane assembly 10 successively.Two groups of hyperfiltration membrane assemblies 4 and 10 are all vertically installed (it is vertical that the film silk is) and similar: be connected with penetrating fluid vent pipe 4-2,10-2 on it, and the bottom is connected with feed-pipe 4-3,10-3, top is connected with liquid concentrator vent pipe 4-1,10-1.Pre-treatment hyperfiltration membrane assembly 4 is communicated with spent acid groove 3 through the feed-pipe 4-3 that is attached thereto; This feed-pipe 4-3 is provided with gas-liquid mixed PWR PLT (specifically being combined by fluid pump 12 and compressed air inlet 13 in the present embodiment), and the liquid concentrator vent pipe 4-1 that links to each other with pre-treatment hyperfiltration membrane assembly 4 returns spent acid groove 3 and inserts wherein; The other end of the penetrating fluid vent pipe 4-2 of pre-treatment hyperfiltration membrane assembly 4 inserts in the buffer memory groove 5.
The dialyzate outlet 6-3 of dialyzer 6 feeds in the complex acid groove 1 through pipeline, and what complex acid groove 1 downstream connected successively is pickling tank 2 and spent acid groove 3, and fluid pump 12 and valve 11 all have been installed on the connecting tube between complex acid groove 1, pickling tank 2 and the spent acid groove 3.
Solid-liquid separator 9 concrete uses is plate filter in the present embodiment.
Claims (5)
1. acid-restoring plant; Comprise spent acid groove and the vertical pre-treatment hyperfiltration membrane assembly of installing; Be connected with the penetrating fluid vent pipe on the pre-treatment hyperfiltration membrane assembly, and the bottom is connected with feed-pipe, top is connected with the liquid concentrator vent pipe, it is characterized in that; The other end of pre-treatment hyperfiltration membrane assembly feed-pipe is communicated with the spent acid groove, and this feed-pipe is provided with the gas-liquid mixed PWR PLT.
2. acid-restoring plant as claimed in claim 1 is characterized in that, the other end of said pre-treatment hyperfiltration membrane assembly liquid concentrator vent pipe inserts in the spent acid groove.
3. according to claim 1 or claim 2 acid-restoring plant; It is characterized in that; Said device also comprises buffer memory groove and dialyzer; The other end of pre-treatment hyperfiltration membrane assembly penetrating fluid vent pipe inserts in the buffer memory groove, and the buffer memory groove is communicated with the opening for feed of dialyzer through pipeline, and this connecting pipe is provided with the gas-liquid mixed PWR PLT.
4. acid-restoring plant as claimed in claim 3; It is characterized in that; The raffinate outlet of said dialyzer links to each other with aeration tank, settling tank, solid-liquid separator and aftertreatment hyperfiltration membrane assembly successively; The water outlet of solid-liquid separator is communicated with the feed-pipe of aftertreatment hyperfiltration membrane assembly, and this feed-pipe is provided with the gas-liquid mixed PWR PLT; The liquid concentrator vent pipe of aftertreatment hyperfiltration membrane assembly returns settling tank and inserts wherein.
5. acid-restoring plant as claimed in claim 4 is characterized in that, the other end of the penetrating fluid vent pipe of aftertreatment hyperfiltration membrane assembly links to each other with the reception liquid of dialyzer inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120273412U CN202144469U (en) | 2011-07-29 | 2011-07-29 | Waste acid recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120273412U CN202144469U (en) | 2011-07-29 | 2011-07-29 | Waste acid recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202144469U true CN202144469U (en) | 2012-02-15 |
Family
ID=45580402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120273412U Expired - Fee Related CN202144469U (en) | 2011-07-29 | 2011-07-29 | Waste acid recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202144469U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259954A (en) * | 2011-07-29 | 2011-11-30 | 郑州银科尔科技有限公司 | Waste acid recycling process and matching device thereof |
| CN103331111A (en) * | 2013-07-17 | 2013-10-02 | 成都工投电子科技有限公司 | Acid supply device system and method |
| CN110776138A (en) * | 2019-10-31 | 2020-02-11 | 南京工大膜应用技术研究所有限公司 | Membrane treatment device and method for steel pickling wastewater |
-
2011
- 2011-07-29 CN CN201120273412U patent/CN202144469U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259954A (en) * | 2011-07-29 | 2011-11-30 | 郑州银科尔科技有限公司 | Waste acid recycling process and matching device thereof |
| CN102259954B (en) * | 2011-07-29 | 2012-07-25 | 郑州银科尔科技有限公司 | Waste acid recycling process and matching device thereof |
| CN103331111A (en) * | 2013-07-17 | 2013-10-02 | 成都工投电子科技有限公司 | Acid supply device system and method |
| CN103331111B (en) * | 2013-07-17 | 2015-08-12 | 成都工投电子科技有限公司 | Acid feeding mechanism system and method |
| CN110776138A (en) * | 2019-10-31 | 2020-02-11 | 南京工大膜应用技术研究所有限公司 | Membrane treatment device and method for steel pickling wastewater |
| CN110776138B (en) * | 2019-10-31 | 2021-12-24 | 南京工大膜应用技术研究所有限公司 | Membrane treatment device and method for steel pickling wastewater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120215 Termination date: 20140729 |
|
| EXPY | Termination of patent right or utility model |