CN105314777A - Device and process for treating hydrofluoric acid purification wastewater - Google Patents
Device and process for treating hydrofluoric acid purification wastewater Download PDFInfo
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- CN105314777A CN105314777A CN201410505639.5A CN201410505639A CN105314777A CN 105314777 A CN105314777 A CN 105314777A CN 201410505639 A CN201410505639 A CN 201410505639A CN 105314777 A CN105314777 A CN 105314777A
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Abstract
The invention discloses a device and process for treating hydrofluoric acid purification wastewater. The treatment process comprises a water distribution section, a stage-A flocculating sedimentation section, a stage-B coagulating sedimentation section and a discharge section; the treatment device consists of underground equipment, a treating device and stand equipment; a two-stage coagulating sedimentation process is adopted, and a first-stage coagulation sedimentation tank is used for carrying out alkali pH adjustment, lime pH adjustment, calcium chloride and PAM flocculation reaction and fluorinion precipitation; and a second-stage coagulation sedimentation tank is used for carrying out sulfuric-acid pH value back-adjustment, PAC and PAM coagulation reaction and fluorinion precipitation, the concentration of fluorinions in supernatant is lower than 10mg/l after two-stage coagulating sedimentation, and the supernatant is discharged after reaching standard. According to the device and the process, the impact resisting load is high, the operation is effective and stable, and the operating cost is reduced; the treatment device adopts integrally-combined hydrofluoric acid wastewater treatment equipment and is manufactured through welding a polypropylene (PP) material, so that the corrosion resistance is good; and the device is simple and convenient to mount and can subject to arrangement adjustment according to on-site actual situations, and the PP material is durable and attractive.
Description
Technical field
The present invention relates to a kind of fluoride wastewater treatment technical equipment field, particularly a kind of hydrofluoric acid purification waste water treatment unit and technique.
Background technology
Fluorine chemical is as one of new chemical materials, and because product has high-performance, high added value, fluorine chemical industry is called as Gold Industry, and within one period of long term, fluorine chemical industry is also one of industry with the fastest developing speed in chemical field; But in the process of fluorine chemical fast development, ubiquitous pollution problem also governs the development of China's fluorine chemical industry simultaneously; In fluorine chemical fluoride waste, complicated component is often containing relatively large fluorine, ammonia and some other foreign ion.But fluorine is toxic pollutant, qualified discharge will not cause huge pollution hazard to whole basin, therefore national environmental protection department considers that fluorine waste water is to the harm of environment and pollution situation all the time, what take fluorine chemical is the policy of developmental limitation, therefore produces very adverse influence to the development in whole fluorine chemical industry future.
Along with China's industrial expansion, discharged volume of industrial waste water is increasing, and the quantity discharged of all kinds of pollution substance also gets more and more thereupon; Wherein, fluorion, because it is to the harm of environment and human body, needs to carry out pre-treatment before plant emissions to pipe network or environment; Prior art adopts the chemical dosing precipitator method to process the waste water of fluorine chemical usually, mainly adopt materializing strategy, by adding chemical agent and fluorion formation throw out, rear formation precipitating sludge, got rid of in settling bath, on container material quality is selected, the general carbon steel that adopts serves as a contrast glass reinforced plastic, steel concrete pond etc.; Except the supernatant liquor after fluorine enters discharge pond, precipitating sludge enters dewatering system and prepares to dehydrate outside rear committee to process.
But this kind of method exists following drawback: because weather, technique, material purity, the assorted reason such as (as: ammonia), medicine solubleness of composition causes chemical feeding quantity to be difficult to control in waste water in dosing process, therefore often occur that waste water exceeds standard phenomenon; Particularly in hydrofluoric acid is purified, waste water fluoro-containing concentration of its discharge is higher, therefore existingly simply adds the emission request that the water outlet of lime one-level coagulation-settlement process is difficult to reach national regulation; Hydrofluoric acid purification waste water has very strong corrodibility, the easy aging corrosion of therefore common equipment, thus causes damage; Because hydrofluoric acid wastewater acidity is comparatively strong, adopt and simply add alkali or add lime, PH adjusts instability, and chemical feeding quantity is very large; Existing process hydrofluoric acid equipment more employing steel concrete inner lining glass fiber reinforced plastic epoxy anticorrosion, during equipment layout, disposing way is fixed, and handiness is not strong, can not adjust according to the practical situation at scene.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of hydrofluoric acid purification waste water treatment unit and technique, for deficiency of the prior art, adopt two-stage coagulation-settlement process, first step coagulative precipitation tank: alkali adjusts PH, lime to adjust PH, calcium chloride and PAM flocculation reaction, fluorion precipitation; Second stage coagulative precipitation tank: sulfuric acid readjustment pH value, PAC and PAM coagulating, fluorion precipitate, and through two-stage coagulation precipitation, in supernatant liquor, fluorinion concentration is at below 10mg/l, gets final product qualified discharge; This two-stage coagulation-settlement process anti impulsion load is high, can effectively steady running, decreases the dosage of coagulating agent, reduces running cost; Ensure that the fluorinion in waste water concentration that it discharges reaches emission request; Treatment unit adopts integrated combined type process hydrofluoric acid wastewater equipment, uses polypropylene (PP) material welding manufacture, corrosion resistance and good; Device is installed simple, convenient, and can carry out adjustment according to on-site actual situations and arrange, PP material is durable in use and attractive in appearance.
For achieving the above object, technical scheme of the present invention is as follows: a kind of hydrofluoric acid purification waste water treatment unit and technique, comprise distribution reservoir, PH equalizing tank, reaction tank A, flocculation basin A, settling tank A, reaction tank B, flocculation basin B, settling tank B, Calcified pond, mud discharging pond, water discharge pond, guide shell, storage bucket, lift pump, sludge pump, volume pump, agitator, PH meter, process pipe, valve, alkali cylinder, calcium chloride cylinder, PAM cylinder, PAC cylinder, sour cylinder, magnetic valve, described PAM is polyacrylamide, and described PAC is polymerize aluminum chloride; It is characterized in that:
Described a kind of hydrofluoric acid purification waste water treatment process comprises water distribution section, A level flocculation sediment section, B level coagulating sedimentation section, discharge section.
1. described in, water distribution section is carried out in described distribution reservoir, and fluoride waste is sent in distribution reservoir, and carry out modifier treatment by aeration agitation mode to the water quality of fluoride waste, the fluoride waste after modified is transported to PH equalizing tank through lift pump.
2. A level flocculation sediment section described in comprises alkali and regulates PH, lime to adjust PH, flocculation reaction, precipitate A; Described alkali adjusts PH to carry out in described PH equalizing tank, automatically the pH value in fluoride waste is detected by PH meter, under whipped state, fluoride waste in described PH equalizing tank is automatically adjusted by volume pump by alkali cylinder, regulate pH value to be 6 ± 0.2, the fluoride waste in described PH equalizing tank flows in reaction tank A automatically.
Described lime adjusts PH to carry out in described reaction tank A, and described lime comes from Calcified pond, is automatically detected the pH value in fluoride waste by PH meter, and under whipped state, by volume pump feeding lime in reaction tank A, the pH value regulating fluoride waste is 9 ± 0.5.
Step operation before succeeding, in described reaction tank A, is counted the pH value automatically detected in fluoride waste, under whipped state, adds calcium chloride by calcium chloride cylinder by volume pump by PH, to the throw out of formation fast a large amount of in described fluoride waste; Fluoride waste in described reaction tank A flows in flocculation basin A automatically.
Described flocculation reaction is carried out in described flocculation basin A, under whipped state, adds PAM by PAM cylinder by volume pump, makes waste water produce larger alumen ustum and is easy to precipitation; Fluoride waste in described flocculation basin A is incorporated in the guide shell at settling tank A center.
Described precipitate A is carried out in described settling tank A, fluoride waste reflects backflow downwards again by guide shell, and in described settling tank A, most of fluorion is precipitated, and carry out solid-liquid two and be separated, supernatant liquor flow into B level coagulating sedimentation section from described settling tank A top with multipoint system, in the storage bucket of sludge settling below described settling tank A, be discharged into mud discharging pond by sludge pump and magnetic valve.
3. B level coagulating sedimentation section described in comprises acid and regulates PH, coagulating, precipitate B; Described acid adjusts PH to carry out in described reaction tank B, is automatically detected the pH value in fluoride waste, under whipped state, is automatically adjusted by sour cylinder by volume pump to the fluoride waste in described reaction tank B, regulate pH value to be 8 ± 0.2 by PH meter.
Step operation before succeeding, in described reaction tank B, automatically detected the pH value in fluoride waste by PH meter, under whipped state, add polymerize aluminum chloride by PAC cylinder by volume pump, the fluoride waste in described reaction tank B flows in flocculation basin B automatically.
Described coagulating carries out in described flocculation basin B, under whipped state, adding PAM by PAM cylinder by volume pump, there is flocculation sediment in the fluorion in fluoride waste again, pollutent is removed again, and the fluoride waste in described flocculation basin B is incorporated in the guide shell at settling tank B center.
Described precipitate B is carried out in described settling tank B, fluoride waste reflects backflow downwards again by guide shell, and in described settling tank B, most of fluorion is precipitated, and carry out solid-liquid two and be separated, supernatant liquor is discharged into water discharge pond from described settling tank B top with multipoint system, in the storage bucket of sludge settling below described settling tank B, be discharged into mud discharging pond by sludge pump and solenoid control.
4. discharge section described in discharges pond by water and mud discharging pond forms, and enters sewage network, process further after up to standard in fluoride waste through water discharge pond; The mud that described settling tank A and settling tank B produces enters described mud discharging pond, further by dehydration drying system process.
Described fluoride waste is after second order reaction precipitation process, and the fluorion in fluoride waste is removed by major part, and final waste water is purified, and the fluorinion concentration in water outlet, can qualified discharge at below 10mg/l.
Described a kind of hydrofluoric acid purification waste water treatment unit is made up of subsurface equipment, treatment unit, pallet equipment, described subsurface equipment comprises distribution reservoir, Calcified pond, mud discharging pond, water discharge pond, described treatment unit comprises PH equalizing tank, reaction tank A, flocculation basin A, settling tank A, reaction tank B, flocculation basin B, settling tank B, lift pump, sludge pump, magnetic valve, described pallet equipment comprises volume pump, alkali cylinder, calcium chloride cylinder, PAM cylinder, PAC cylinder, sour cylinder, described subsurface equipment is concrete construction rectangle form pool body, described subsurface equipment is all arranged at below ground position, aerated conduit is provided with bottom described distribution reservoir and water discharge pond, described Calcified pond is provided with agitator, described treatment unit is for being arranged at ground rectangular tank case structure, all adopt polypropylene material welding manufacture, storage bucket is provided with bottom described settling tank A and settling tank B, described storage bucket is cone-shaped body, described PH equalizing tank is connected with described reaction tank A, described reaction tank A and flocculation basin A is set up in parallel, described reaction tank A be connected described settling tank A after flocculation basin A, be connected with reaction tank B and flocculation basin B after described settling tank A, described reaction tank B and flocculation basin B is set up in parallel, described reaction tank B is connected with described settling tank B with after flocculation basin B parallel body, described pallet equipment is all arranged on pallet, and described pallet position is higher than described treatment unit, and described pallet arranges and is provided with volume pump and valve, described PH equalizing tank, reaction tank A, flocculation basin A, reaction tank B, flocculation basin B are provided with agitator, described PH equalizing tank, reaction tank A, reaction tank B are provided with PH meter, the PH equalizing tank in described treatment unit, reaction tank A, flocculation basin A, settling tank A, reaction tank B, flocculation basin B, settling tank B are communicated with valve successively by process pipe, described distribution reservoir is described PH equalizing tank transport wastewater by two cover lift pumps, by sludge pump and magnetic valve and described mud discharging pond pipeline communication bottom described settling tank A and settling tank B, described alkali cylinder is connected by process pipe and valve with flocculation basin B with reaction tank B, described PAM cylinder with flocculation basin A, described sour cylinder and PAC cylinder with described reaction tank A, described PAM cylinder with PH equalizing tank, described Calcified pond, calcium chloride cylinder.
Adopt flange between described process pipe and equipment, sludge pump, lift pump, volume pump, seal and be spirally connected; Described treatment unit uses the mode of PP plate welding to manufacture, and adopt rectangle without cap structure, described PH equalizing tank, reaction tank A, flocculation basin A are integral type reactive tank, have agitator installation and maintenance space and dosing space in groove; Wherein regulate the chemical feeding quantity of PH by PH meter and the interlock of dosing volume pump; Settling tank A bottom pyramidal structure, top is square structure; Described settling tank A square structure center arranges guide shell as inlet area, and bottom pyramidal part is as storage bucket, and receive the throw out that reaction tank produces, described storage bucket tapered section arranges shore pipe; Described settling tank A water outlet, at square structure position, top, realizes muddy water two-phase solid-liquid separation; Supernatant liquor enters B level coagulating sedimentation section from top by weir plate overflow, arranges multipoint water feeding when supernatant liquor enters reaction tank B, ensures water inlet homogeneity; Described reaction tank B and flocculation basin B adopts rectangle without cap structure equally, carries out stirring and drug feeding pipeline in groove, and described reaction tank B and flocculation basin B is integral type side-by-side reactions groove; In groove, water outlet enters the central draft tube of described settling tank B, and its mode of connection adopts pipe flange to connect.
Described lift pump is provided with two covers, is communicated with PH equalizing tank by process pipe, and by the effect of lift pump, fluoride waste is promoted to described PH and adjusts in pond, then fluoride waste flows to described reaction tank A and flocculation basin A voluntarily; Then fluoride waste enters described settling tank A, in described settling tank A, supernatant liquor overflow enters described reaction tank B, flows into flocculation basin B, then importing to described settling tank B by reaction tank B, because other is and flows voluntarily except water inlet, save wastewater treatment volume power charge.
Described PH equalizing tank, reaction tank A, flocculation basin A and described reaction tank B, flocculation basin B are uncovered integral type cell body, and inside is provided with stirrer, and because this is as uncovered, and itself is except stirrer, and cell body is substantially without the need to maintenance repair and maintenance.
Described settling tank A and settling tank B sets out water discharge spout road and mud discharging pipeline, respectively by purification after waste water and pollutent mud discharging to special container; Because its outlet conduit and spoil disposal duct orientation can need adjustment arbitrarily according to scene, so have fabulous composite behaviour with integral type cell body, because equipment is that PP is integrally welded, daily substantially need considers repair and maintenance.
Described A level flocculation sediment section is that the pollution substance of high density is formed deposit seeds thing, and the throw out formed is got rid of by pipeline and pump in described storage bucket; After described B level coagulating sedimentation section is placed on described A level flocculation sediment section, object is that the pollution substance of lower concentration is formed deposit seeds thing, purifies liquid waste further, then forms throw out from settling tank B, is got rid of in storage bucket by pipeline and pump.
Described PH meter all adopts hf resi stant type PH meter, effectively can monitor the pH value of waste water, in order to control to add lime, add the amount of alkali and acid adding; General PH counts probe needs periodic replacement.
Processing power of the present invention is 0.5t/hr-5t/hr; Power supply is three-phase 380V, 50hz distribution.
PH equalizing tank, reaction tank A, flocculation basin A, settling tank A, reaction tank B, flocculation basin B, settling tank B in the present invention, situation is taken up an area under the prerequisite not changing technical process according to scene, multiple combination can be carried out by welding process, simultaneously can according to the water yield situation of fluoride waste, suitable adjusted design each several part size, be applicable to multiple fluoride wastewater treatment amount, ensure treatment effect.
Principle of work of the present invention is: hydrofluoric acid purification waste water treatment process, by water pump, fluoride waste is once promoted, by adding chemical agent flocculation at reaction tank A, reaction tank B, the precipitation separation of pollution substance is realized at settling tank A and settling tank B, the pollutents such as effective removal fluorion, metal ion, phosphate anion, ensure the qualified discharge of effluent quality.
Distribution reservoir waste water adjusts its water quality by the mode of aeration agitation, is promoted afterwards enter PH equalizing tank by lift pump, and waste water pH value controls to add alkali cylinder and volume pump by PH meter automatically, and about adjusting pH value to 6, waste water gravity flow afterwards enters reaction tank A, reaction tank A is in limit stirring, limit adds medicament state, about its feeding lime adjustment pH value to 9, add calcium chloride, increase its calcium ion concn, the fluoride ion contaminant in waste water forms throw out fast, and waste water gravity flow afterwards enters in flocculation basin A, in flocculation basin A, add PAM, make waste water produce larger alumen ustum and be easy to precipitation, after reaction, water outlet enters in the guide shell of settling tank A, the separation of solid-liquid is realized in settling tank A, supernatant liquor enters reaction tank B in multipoint water feeding mode, automatically acid adding amount is controlled by PH meter in reaction tank B, control pH value about 8, add polymerize aluminum chloride simultaneously, waste water gravity flow afterwards enters in flocculation basin B, add PAM, again there is flocculation sediment in fluorion under agitation, pollutent is removed again, reaction tank B water outlet enters in the central draft tube of settling tank B, through A level flocculation sediment section and B level coagulating sedimentation section, in this two-stage reaction precipitation process, fluorion in sewage is removed by major part, fluorinion concentration in final waste water controls to be purified at below 10mg/L, water outlet can qualified discharge.
By technique scheme, the beneficial effect of technical solution of the present invention is: adopt two-stage coagulation-settlement process, first step coagulative precipitation tank: alkali adjusts PH, lime to adjust PH, calcium chloride and PAM flocculation reaction, fluorion precipitation; Second stage coagulative precipitation tank: sulfuric acid readjustment pH value, PAC and PAM coagulating, fluorion precipitate, and through two-stage coagulation precipitation, in supernatant liquor, fluorinion concentration is at below 10mg/l, gets final product qualified discharge; This two-stage coagulation-settlement process anti impulsion load is high, can effectively steady running, decreases the dosage of coagulating agent, reduces running cost; Ensure that the fluorinion in waste water concentration that it discharges reaches emission request; Treatment unit adopts integrated combined type process hydrofluoric acid wastewater equipment, uses polypropylene (PP) material welding manufacture, corrosion resistance and good; Device is installed simple, convenient, and can carry out adjustment according to on-site actual situations and arrange, PP material is durable in use and attractive in appearance.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of hydrofluoric acid purification waste water treatment unit schematic diagram disclosed in the embodiment of the present invention;
Fig. 2 is hydrofluoric acid purification waste water processing technological flow schematic diagram a kind of disclosed in the embodiment of the present invention.
Numeral and the corresponding component title represented by letter in figure:
1. distribution reservoir 2.PH equalizing tank 3. reaction tank A4. flocculation basin A
5. settling tank A6. reaction tank B7. flocculation basin B8. settling tank B
9. Calcified pond 10. mud discharging Chi11.Shui discharges pond 12. guide shell
13. storage bucket 14. lift pump 15. sludge pump 16. volume pumps
17. agitator 18.PH count 19. process pipe 20. valves
21. alkali cylinder 22. calcium chloride cylinder 23.PAM cylinder 24.PAC cylinders
25. sour cylinder 26. magnetic valves
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, carry out clear intactly describing to the technical scheme in the embodiment of the present invention, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
According to Fig. 1 and Fig. 2, the invention provides a kind of hydrofluoric acid purification waste water treatment unit and technique, comprise distribution reservoir 1, PH equalizing tank 2, reaction tank A3, flocculation basin A4, settling tank A5, reaction tank B6, flocculation basin B7, settling tank B8, Calcified pond 9, mud discharging pond 10, water discharge pond 11, guide shell 12, storage bucket 13, lift pump 14, sludge pump 15, volume pump 16, agitator 17, PH meter 18, process pipe 19, valve 20, alkali cylinder 21, calcium chloride cylinder 22, PAM cylinder 23, PAC cylinder 24, sour cylinder 25, magnetic valve 26.
Described a kind of hydrofluoric acid purification waste water treatment process comprises water distribution section, A level flocculation sediment section, B level coagulating sedimentation section, discharge section.
1. water distribution section described in is carried out in described distribution reservoir 1, and fluoride waste is sent in distribution reservoir 1, and carry out modifier treatment by aeration agitation mode to the water quality of fluoride waste, the fluoride waste after modified is transported to PH equalizing tank 2 through lift pump 14.
2. A level flocculation sediment section described in comprises alkali and adjusts PH, lime to adjust PH, flocculation reaction, precipitate A; Described alkali adjusts PH to carry out in described PH equalizing tank 2, automatically the pH value in fluoride waste is detected by PH meter 18, under whipped state, fluoride waste in described PH equalizing tank 2 is automatically adjusted by volume pump 16 by alkali cylinder 21, regulate pH value to be 6 ± 0.2, the fluoride waste in described PH equalizing tank 2 flows in reaction tank A3 automatically.
Described lime adjusts PH to carry out in described reaction tank A3, described lime comes from Calcified pond 9, is automatically detected the pH value in fluoride waste, by PH meter 18 under whipped state, by volume pump 16 feeding lime in reaction tank A3, the pH value regulating fluoride waste is 9 ± 0.5.
Step operation before succeeding, in described reaction tank A3, counts the 18 automatic pH values detected in fluoride waste by PH, under whipped state, adds calcium chloride by calcium chloride cylinder 22 by volume pump 16, to the throw out of formation fast a large amount of in described fluoride waste; Fluoride waste in described reaction tank A3 flows in flocculation basin A4 automatically.
Described flocculation reaction is carried out in described flocculation basin A4, under whipped state, adds PAM by PAM cylinder 23 by volume pump 16, makes waste water produce larger alumen ustum and is easy to precipitation; Fluoride waste in described flocculation basin A4 is incorporated in the guide shell 12 at settling tank A5 center.
Described precipitate A is carried out in described settling tank A5, fluoride waste reflects backflow downwards again by guide shell 12, and in described settling tank A5, most of fluorion is precipitated, and carry out solid-liquid two and be separated, supernatant liquor flow into B level coagulating sedimentation section from described settling tank A5 top with multipoint system, in the storage bucket of sludge settling below described settling tank A5, by sludge pump 15 and magnetic valve 16 control discharge to mud discharging pond 10.
3. B level coagulating sedimentation section described in comprises acid and regulates PH, coagulating, precipitate B; Described acid adjusts PH to carry out in described reaction tank B6, is automatically detected the pH value in fluoride waste, under whipped state, is automatically adjusted by sour cylinder 25 by volume pump 16 to the fluoride waste in described reaction tank B6, regulate pH value to be 8 ± 0.2 by PH meter 18.
Step operation before succeeding, in described reaction tank B6, automatically detected the pH value in fluoride waste by PH meter 18, under whipped state, add polymerize aluminum chloride by PAC cylinder 24 by volume pump 16, the fluoride waste in described reaction tank B6 flows in flocculation basin B7 automatically.
Described coagulating carries out in described flocculation basin B7, under whipped state, PAM is added by volume pump 16 by PAM cylinder 23, again there is flocculation sediment in the fluorion in fluoride waste, pollutent is removed again, and the fluoride waste in described flocculation basin B7 is incorporated in the guide shell 12 at settling tank B8 center.
Described precipitate B is carried out in described settling tank B8, fluoride waste reflects backflow downwards again by guide shell 12, and in described settling tank B8, most of fluorion is precipitated, and carry out solid-liquid two and be separated, supernatant liquor is discharged into water discharge pond 11 from described settling tank B8 top with multipoint system, in the storage bucket 13 of sludge settling below described settling tank B8, by sludge pump 15 and magnetic valve 26 control discharge to mud discharging pond 10.
4. discharge section described in discharges pond 11 by water and mud discharging pond 10 forms, and enters sewage network, process further after up to standard in fluoride waste through water discharge pond 11; The mud that described settling tank A5 and settling tank B8 produces enters described mud discharging pond 10, further by dehydration drying system process.
Described fluoride waste is after second order reaction precipitation process, and the fluorion in fluoride waste is removed by major part, and final waste water is purified, and the fluorinion concentration in water outlet, can qualified discharge at below 10mg/l.
Described a kind of hydrofluoric acid purification waste water treatment unit is made up of subsurface equipment, treatment unit, pallet equipment, described subsurface equipment comprises distribution reservoir 1, Calcified pond 9, mud discharging pond 10, water discharge pond 11, described treatment unit comprises PH equalizing tank 2, reaction tank A3, flocculation basin A4, settling tank A5, reaction tank B6, flocculation basin B7, settling tank B8, lift pump 14, sludge pump 15, magnetic valve 26, described pallet equipment comprises volume pump 16, alkali cylinder 21, calcium chloride cylinder 22, PAM cylinder 23, PAC cylinder 24, sour cylinder 25, described subsurface equipment is concrete construction rectangle form pool body, described subsurface equipment is all arranged at below ground position, aerated conduit is provided with bottom described distribution reservoir 1 and water discharge pond 11, described Calcified pond 9 is provided with agitator 17, described treatment unit is for being arranged at ground rectangular tank case structure, all adopt polypropylene material welding manufacture, storage bucket 13 is provided with bottom described settling tank A5 and settling tank B8, described storage bucket 13 is cone-shaped body, described PH equalizing tank 2 is connected with described reaction tank A3, described reaction tank A3 and flocculation basin A4 is set up in parallel, described reaction tank A3 be connected described settling tank A5 after flocculation basin A4, be connected with reaction tank B6 and flocculation basin B7 after described settling tank A5, described reaction tank B6 and flocculation basin B7 is set up in parallel, described reaction tank B6 is connected with described settling tank B8 with after flocculation basin B7 parallel body, described pallet equipment is all arranged on pallet, and described pallet position is higher than described treatment unit, and described pallet arranges and is provided with volume pump 16 and valve 20, described PH equalizing tank 2, reaction tank A3, flocculation basin A4, reaction tank B6, flocculation basin B7 are provided with agitator 17, described PH equalizing tank 2, reaction tank A3, reaction tank B6 are provided with PH meter 18, the PH equalizing tank 2 in described treatment unit, reaction tank A3, flocculation basin A4, settling tank A5, reaction tank B6, flocculation basin B7, settling tank B8 are communicated with valve 20 successively by process pipe 19, described distribution reservoir 1 is described PH equalizing tank 2 transport wastewater by two cover lift pumps 14, by sludge pump 15 and magnetic valve 26 and described mud discharging pond 10 pipeline communication bottom described settling tank A5 and settling tank B8, described alkali cylinder 21 is connected by process pipe 19 and valve 20 with flocculation basin B6 with reaction tank B6, described PAM cylinder 23 with flocculation basin A4, described sour cylinder 25 and PAC cylinder 24 with described reaction tank A3, described PAM cylinder 23 with PH equalizing tank 2, described Calcified pond 9, calcium chloride cylinder 22.
Adopt flange between described process pipe 19 and equipment, sludge pump 15, lift pump 14, volume pump 16, seal and be spirally connected; Described treatment unit uses the mode of PP plate welding to manufacture, and adopt rectangle without cap structure, described PH equalizing tank 2, reaction tank A3, flocculation basin A4 are integral type reactive tank, have agitator 17 installation and maintenance space and dosing space in groove; The chemical feeding quantity of PH is wherein regulated to be linked by PH meter 18 and dosing volume pump 16; Settling tank A5 bottom pyramidal structure, top is square structure; Described settling tank A5 square structure center arranges guide shell 12 as inlet area, and bottom pyramidal part is as storage bucket 13, and receive the throw out that reaction tank produces, described storage bucket 13 tapered section arranges shore pipe; Described settling tank A5 water outlet, at square structure position, top, realizes muddy water two-phase solid-liquid separation; Supernatant liquor enters B level coagulating sedimentation section from top by weir plate overflow, arranges multipoint water feeding when supernatant liquor enters reaction tank B6, ensures water inlet homogeneity; Described reaction tank B6 and flocculation basin B7 adopts rectangle without cap structure equally, carries out stirring and drug feeding pipeline in groove, and described reaction tank B6 and flocculation basin B7 is integral type side-by-side reactions groove; In groove, water outlet enters the central draft tube 12 of described settling tank B8, and its mode of connection adopts pipe flange to connect.
Described lift pump 14 is provided with two covers, is communicated with PH equalizing tank 2 by process pipe 19, and by the effect of lift pump 14, fluoride waste is promoted to described PH and adjusts in pond 2, then fluoride waste flows to described reaction tank A3 and flocculation basin A4 voluntarily; Then fluoride waste enters described settling tank A5, in described settling tank A5, supernatant liquor overflow enters described reaction tank B6, flows into flocculation basin B7, then importing to described settling tank B8 by reaction tank B6, because other is and flows voluntarily except water inlet, greatly save wastewater treatment volume power charge.
Described PH equalizing tank 2, reaction tank A3, flocculation basin A4 and described reaction tank B6, flocculation basin B7 are uncovered integral type cell body, and inside is provided with agitator 17, and because this is as uncovered, and itself is except stirrer, and cell body is substantially without the need to maintenance repair and maintenance.
Described settling tank A5 and settling tank B8 sets out water discharge spout road and mud discharging pipeline, respectively by purification after waste water and pollutent mud discharging to special container; Because its outlet conduit and spoil disposal duct orientation can need adjustment arbitrarily according to scene, so have fabulous composite behaviour with integral type cell body, because equipment is that PP is integrally welded, daily substantially need considers repair and maintenance.
Described A level flocculation sediment section is that the pollution substance of high density is formed deposit seeds thing, and the throw out formed is got rid of by pipeline and pump in described storage bucket 13; After described B level coagulating sedimentation section is placed on described A level flocculation sediment section, object is that the pollution substance of lower concentration is formed deposit seeds thing, purifies liquid waste further, then forms throw out from settling tank B8, is got rid of in storage bucket 13 by pipeline and pump.Described PH meter 18 all adopts hf resi stant type PH meter, effectively can monitor the pH value of waste water.
Processing power of the present invention is 0.5t/hr-5t/hr; Power supply is three-phase 380V, 50hz distribution.
PH equalizing tank 2, reaction tank A3, flocculation basin A4, settling tank A5, reaction tank B6, flocculation basin B7, settling tank B8 in the present invention, situation is taken up an area under the prerequisite not changing technical process according to scene, multiple combination can be carried out by welding process, simultaneously can according to the water yield situation of fluoride waste, suitable adjusted design each several part size, be applicable to multiple fluoride wastewater treatment amount, ensure treatment effect.
Principle of work of the present invention is: hydrofluoric acid purification waste water treatment process, by water pump, fluoride waste is once promoted, by adding chemical agent flocculation at reaction tank A3, reaction tank B6, the precipitation separation of pollution substance is realized at settling tank A5 and settling tank B8, the pollutents such as effective removal fluorion, metal ion, phosphate anion, ensure the qualified discharge of effluent quality.
Distribution reservoir 1 waste water adjusts its water quality by the mode of aeration agitation, is promoted afterwards enter PH equalizing tank 2 by lift pump 14, and waste water pH value controls to add alkali cylinder 21 and volume pump 16 by PH meter 18 automatically, and about adjusting pH value to 6, waste water gravity flow afterwards enters reaction tank A3, reaction tank A3 is in limit stirring, limit adds medicament state, about its feeding lime adjustment pH value to 9, add calcium chloride, increase its calcium ion concn, the fluoride ion contaminant in waste water forms throw out fast, and waste water gravity flow afterwards enters in flocculation basin A4, in flocculation basin A4, add PAM, make waste water produce larger alumen ustum and be easy to precipitation, after reaction, water outlet enters in the guide shell of settling tank A5, the separation of solid-liquid is realized in settling tank A5, supernatant liquor enters reaction tank B6 in multipoint water feeding mode, automatically acid adding amount is controlled by PH meter 18 in reaction tank B6, control pH value about 8, add polymerize aluminum chloride simultaneously, waste water gravity flow afterwards enters in flocculation basin B7, add PAM, again there is flocculation sediment in fluorion under agitation, pollutent is removed again, reaction tank B7 water outlet enters in the central draft tube 12 of settling tank B8, through A level flocculation sediment section and B level coagulating sedimentation section, in this two-stage reaction precipitation process, fluorion in sewage is removed by major part, fluorinion concentration in final waste water controls to be purified at below 10mg/L, water outlet can qualified discharge.
Specific embodiment of the invention operation steps: the size and the cleanup standard that process wastewater flow rate as required, can select the method increasing technique each several part size or increase technique tricks to solve; Technique each several part size and height, and the handled water yield is corresponding.
Such as: the waste water of 20t/d, the service ability of design 1t/hr, A order reaction is about 20min with flocculation and the B order reaction flocculation part residence time, then single groove volume is 0.3m
3; The residence time of settling tank A, settling tank B is 2hr, upflow velocity 1m/hr, then settling tank A, settling tank B are of a size of 1m × 1m × 3m; The processing power of the reached 1t/hr of described treatment unit.
By above-mentioned specific embodiment, the invention has the beneficial effects as follows: adopt two-stage coagulation-settlement process, first step coagulative precipitation tank: alkali adjusts PH, lime to adjust PH, calcium chloride and PAM flocculation reaction, fluorion precipitation; Second stage coagulative precipitation tank: sulfuric acid readjustment pH value, PAC and PAM coagulating, fluorion precipitate, and through two-stage coagulation precipitation, in supernatant liquor, fluorinion concentration is at below 10mg/l, gets final product qualified discharge; This two-stage coagulation-settlement process anti impulsion load is high, can effectively steady running, decreases the dosage of coagulating agent, reduces running cost; Ensure that the fluorinion in waste water concentration that it discharges reaches emission request; Treatment unit adopts integrated combined type process hydrofluoric acid wastewater equipment, uses polypropylene (PP) material welding manufacture, corrosion resistance and good; Device is installed simple, convenient, and can carry out adjustment according to on-site actual situations and arrange, PP material is durable in use and attractive in appearance.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a hydrofluoric acid purification waste water treatment process, is characterized in that, described a kind of hydrofluoric acid purification waste water treatment process comprises water distribution section, A level flocculation sediment section, B level coagulating sedimentation section, discharge section;
Described in 1.1, water distribution section is carried out in described distribution reservoir, and fluoride waste is sent in distribution reservoir, and carry out modifier treatment by aeration agitation mode to the water quality of fluoride waste, the fluoride waste after modified is transported to PH equalizing tank through lift pump;
A level flocculation sediment section described in 1.2 comprises alkali and regulates PH, lime to adjust PH, flocculation reaction, precipitate A; Described alkali adjusts PH to carry out in described PH equalizing tank, automatically the pH value in fluoride waste is detected by PH meter, under whipped state, fluoride waste in described PH equalizing tank is automatically adjusted by volume pump by alkali cylinder, regulate pH value to be 6 ± 0.2, the fluoride waste in described PH equalizing tank flows in reaction tank A automatically;
Lime described in 1.3 adjusts PH to carry out in described reaction tank A, described lime comes from Calcified pond, is automatically detected the pH value in fluoride waste, by PH meter under whipped state, by volume pump feeding lime in reaction tank A, the pH value regulating fluoride waste is 9 ± 0.5;
1.4 continue before step operation, in described reaction tank A, automatically detected the pH value in fluoride waste by PH meter, under whipped state, add calcium chloride by calcium chloride cylinder by volume pump, to the throw out of formation fast a large amount of in described fluoride waste; Fluoride waste in described reaction tank A flows in flocculation basin A automatically;
Flocculation reaction described in 1.5 is carried out in described flocculation basin A, under whipped state, adds PAM by PAM cylinder by volume pump, makes waste water produce larger alumen ustum and is easy to precipitation; Fluoride waste in described flocculation basin A is incorporated in the guide shell at settling tank A center;
Precipitate A described in 1.6 is carried out in described settling tank A, fluoride waste reflects backflow downwards again by guide shell, and in described settling tank A, most of fluorion is precipitated, and carry out solid-liquid two and be separated, supernatant liquor flow into B level coagulating sedimentation section from described settling tank A top with multipoint system, in the storage bucket of sludge settling below described settling tank A, be discharged into mud discharging pond by sludge pump and magnetic valve;
B level coagulating sedimentation section described in 1.7 comprises acid and regulates PH, coagulating, precipitate B; Described acid adjusts PH to carry out in described reaction tank B, is automatically detected the pH value in fluoride waste, under whipped state, is automatically adjusted by sour cylinder by volume pump to the fluoride waste in described reaction tank B, regulate pH value to be 8 ± 0.2 by PH meter;
1.8 succeed front step operation, and in described reaction tank B, by the pH value in PH meter automatically detection fluoride waste, under whipped state, add polymerize aluminum chloride by PAC cylinder by volume pump, the fluoride waste in described reaction tank B flows in flocculation basin B automatically;
Coagulating described in 1.9 carries out in described flocculation basin B, under whipped state, adding PAM by PAM cylinder by volume pump, there is flocculation sediment in the fluorion in fluoride waste again, pollutent is removed again, and the fluoride waste in described flocculation basin B is incorporated in the guide shell at settling tank B center;
1.10 state precipitate B carries out in described settling tank B, fluoride waste reflects backflow downwards again by guide shell, and in described settling tank B, most of fluorion is precipitated, and carry out solid-liquid two and be separated, supernatant liquor is discharged into water discharge pond from described settling tank B top with multipoint system, in the storage bucket of sludge settling below described settling tank B, be discharged into mud discharging pond by sludge pump and solenoid control;
Discharge section described in 1.11 discharges pond by water and mud discharging pond forms, and enters sewage network, process further after up to standard in fluoride waste through water discharge pond; The mud that described settling tank A and settling tank B produces enters described mud discharging pond, further by dehydration drying system process;
Described fluoride waste is after second order reaction precipitation process, and the fluorion in fluoride waste is removed by major part, and final waste water is purified, and the fluorinion concentration in water outlet, can qualified discharge at below 10mg/l.
2. described in, a kind of hydrofluoric acid purification waste water treatment unit, is characterized in that, described a kind of hydrofluoric acid purification waste water treatment unit is made up of subsurface equipment, treatment unit, pallet equipment, described subsurface equipment comprises distribution reservoir, Calcified pond, mud discharging pond, water discharge pond, described treatment unit comprises PH equalizing tank, reaction tank A, flocculation basin A, settling tank A, reaction tank B, flocculation basin B, settling tank B, lift pump, sludge pump, magnetic valve, described pallet equipment comprises volume pump, alkali cylinder, calcium chloride cylinder, PAM cylinder, PAC cylinder, sour cylinder, described subsurface equipment is concrete construction rectangle form pool body, described subsurface equipment is all arranged at below ground position, aerated conduit is provided with bottom described distribution reservoir and water discharge pond, described Calcified pond is provided with agitator, described treatment unit is for being arranged at ground rectangular tank case structure, all adopt polypropylene material welding manufacture, storage bucket is provided with bottom described settling tank A and settling tank B, described storage bucket is cone-shaped body, described PH equalizing tank is connected with described reaction tank A, described reaction tank A and flocculation basin A is set up in parallel, described reaction tank A be connected described settling tank A after flocculation basin A, be connected with reaction tank B and flocculation basin B after described settling tank A, described reaction tank B and flocculation basin B is set up in parallel, described reaction tank B is connected with described settling tank B with after flocculation basin B parallel body, described pallet equipment is all arranged on pallet, and described pallet position is higher than described treatment unit, and described pallet arranges and is provided with volume pump and valve, described PH equalizing tank, reaction tank A, flocculation basin A, reaction tank B, flocculation basin B are provided with agitator, described PH equalizing tank, reaction tank A, reaction tank B are provided with PH meter, the PH equalizing tank in described treatment unit, reaction tank A, flocculation basin A, settling tank A, reaction tank B, flocculation basin B, settling tank B are communicated with valve successively by process pipe, described distribution reservoir is described PH equalizing tank transport wastewater by two cover lift pumps, by sludge pump and magnetic valve and described mud discharging pond pipeline communication bottom described settling tank A and settling tank B, described alkali cylinder is connected by process pipe and valve with flocculation basin B with reaction tank B, described PAM cylinder with flocculation basin A, described sour cylinder and PAC cylinder with described reaction tank A, described PAM cylinder with PH equalizing tank, described Calcified pond, calcium chloride cylinder.
3. a kind of hydrofluoric acid purification waste water treatment unit according to claim 2, is characterized in that, adopts flange, seals and be spirally connected between described process pipe and equipment, sludge pump, lift pump, volume pump; Described treatment unit uses the mode of PP plate welding to manufacture, and adopt rectangle without cap structure, described PH equalizing tank, reaction tank A, flocculation basin A are integral type reactive tank, have agitator installation and maintenance space and dosing space in groove; Wherein regulate the chemical feeding quantity of PH by PH meter and the interlock of dosing volume pump; Settling tank A bottom pyramidal structure, top is square structure; Described settling tank A square structure center arranges guide shell as inlet area, and bottom cone is divided into storage bucket, and described storage bucket tapered section arranges shore pipe; Described settling tank A water outlet is at square structure position, top; Supernatant liquor enters B level coagulating sedimentation section from top by weir plate overflow, arranges multipoint water feeding when supernatant liquor enters reaction tank B; Described reaction tank B and flocculation basin B adopts rectangle without cap structure equally, carries out agitator and drug feeding pipeline in groove, and described reaction tank B and flocculation basin B is integral type side-by-side reactions groove; In groove, water outlet enters the central draft tube of described settling tank B, and its mode of connection adopts pipe flange to connect.
4. a kind of hydrofluoric acid purification waste water treatment unit according to claim 2, it is characterized in that, described lift pump is provided with two covers, is communicated with PH equalizing tank by process pipe.
5. a kind of hydrofluoric acid purification waste water treatment unit according to claim 2, is characterized in that, described PH meter all adopts hf resi stant type PH meter.
6. a kind of hydrofluoric acid purification waste water treatment unit according to claim 2, is characterized in that, the processing power of described treatment unit is 0.5t/hr-5t/hr.
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| CN111732227A (en) * | 2020-07-07 | 2020-10-02 | 江苏源邦环境科技有限公司 | Semiconductor fluorine-containing wastewater treatment system and process |
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Application publication date: 20160210 |