CN106904776A - Roasting process for extracting vanadium wastewater treatment equipment - Google Patents
Roasting process for extracting vanadium wastewater treatment equipment Download PDFInfo
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- CN106904776A CN106904776A CN201511008322.1A CN201511008322A CN106904776A CN 106904776 A CN106904776 A CN 106904776A CN 201511008322 A CN201511008322 A CN 201511008322A CN 106904776 A CN106904776 A CN 106904776A
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- 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
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- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The present invention provides a kind of roasting process for extracting vanadium wastewater treatment equipment, and its structure includes：Multi-effect evaporator, heated-air drying tower, chemical precipitation device；Multi-effect evaporator is constituted by multiple evaporators are successive, and roasting process for extracting vanadium waste water first passes around multi-effect evaporator, completes initial concentration, enter back into heated-air drying tower, hot-air carries out caloic and exchanges with waste water, and waste water is further concentrated, from bottom of towe outflow, carry out crystallisation by cooling, supernatant enters chemical precipitation device, and by reduction cell, neutralization chamber and sedimentation basin, precipitation is completed, supernatant qualified discharge, it is characterised in that：The structure for being calcined process for extracting vanadium wastewater treatment equipment also includes：Slag hot-blast stove, by the red heat slag being calcined, into slag hot-blast stove in air is heated, air is heated to form hot-air outflow, and hot-air is used for heated-air drying tower dried material.
Description
Technical field
The present invention relates to green technology, process for extracting vanadium wastewater treatment equipment is more particularly to calcined.
Background technology
Large Fe alloy production factory produces tens thousand of tons of smelted furnace cinders every year, small of the ferroalloy not waited containing 1-5% still in slag
Grain, the attention with people to metals resources regeneration reclaims the metal in slag using various methods, and recovery product is usual
It is referred to as ferroalloy slag (such as ferrochrome slag, silicon manganese slag, white residue).
By the ensaying to ferrovanadium slag sodium carbonate roasting-water logging overall process, calculation of thermodynamics and contrast experiment, stove is have studied
Vanadium conversion, the mechanism and rule of dissolution, as a result show in slag：Increase with sintering temperature and time, vanadate phase showed increased,
Vanadium dissolution rate increases.After water logging, vanadium enters water phase to roasting clinker in the form of soluble sodium vanadate and sodium aluminate.Sintering temperature
Under 1000 DEG C and roasting time 4h of optimal conditions, the dissolution rate of vanadium is up to 90%.
It is huge containing the poisonous tailings in vanadium extraction of vanadium and v-bearing steel slag annual emissions, and it is existing roasting process for extracting vanadium exist vanadium turn leaching rate it is low,
The problem that sintering temperature is high, cost is high etc..The process of alkaline media water-heat process high efficiente callback vanadium, the wherein vanadium in tailings in vanadium extraction is big
That concentrates is present in iron ore phase (Fe_2O_3) and pseudobrookite phase (Fe_2TiO_5), while also some preservation is bored in containing Si
In pyroxene phase (NaFe (SiO_3) _ 2)；Vanadium in slag then main preservation and dicalcium silicate, tricalcium silicate, free oxidation thing and iron
In sour calcium phase.And the vanadium in tailings in vanadium extraction and slag more than 92%, 94% is respectively alkali-soluble.Temperature and alkali concn pair
The destruction influence of silicate phase is notable, improves temperature and increases Liquid phase flowability, enhances liquid-solid mass transfer effect, and improve
Chemical reactivity；And decomposition of the alkali concn to silicate phase is presented linearly increasing relation.
The technology of vanadium is extracted in v-bearing steel slag
V-bearing steel slag be vanadium-bearing hot metal directly in converter by slag obtained from the steel-making of alkaline single slag process.This kind of slag ingredient is answered
It is miscellaneous, and often fluctuation.The characteristics of v-bearing steel slag is calcium oxide content high, and content of vanadium is relatively low.Calcium titanium oxide molecule in slag
Formula can write a Chinese character in simplified form into Ca3 (Ti, V) 207.The mineral are the long plate shape mineral that a kind of black thickness is not waited, and are connected with other mineral
Raw, vanadium displacement titanium enters in lattice.V205 contents are 9.78% in the mineral, and its vanadium amount accounts for 78% of total vanadium amount in slag, is
The main object of vanadium extraction.
It is a kind of pioneering process for extracting vanadium of China that v-bearing steel slag returns to blast furnace treatment.It is that small height is returned after v-bearing steel slag is re-sintered
Stove, practises the molten iron containing vanadium 2~3%, then is blended into blowing in oxygen bottom blown converter, obtains height of the V205 contents higher than 35~40%
Vanadium slag.This slag is reduced directly in electric furnace, produces the vanadium iron more than 35% containing vanadium.
The characteristics of v-bearing steel slag is calcium oxide content high.With traditional sodium-salt calcination -- water logging process for extracting vanadium, V leaching rate is very low.
The sodium-salt calcination for working out at present -- carbonating extract technology preferably resolves the harm of calcium oxide.In v-bearing steel slag, vanadium master
Preservation is wanted in vanadium calcium titanium oxide, vanadium calcium titanium oxide reacts with sodium carbonate during roasting：
2Ca3V207+Na2CO3+O2=3CaO+2NaVO3+Ca3 (VO4) 2+CO2
Also there is similar reaction with sodium carbonate in calcium silicon vanadate：
2 [Ca2SiO4Ca (VO4) 2]+Na2CO3+O2=2Ca2SiO4+2NaVO3+Ca3 (VO4) 2+5CaO+CO3
Water-soluble vanadium about 20% after sintering, be carbonated the vanadium about 60% for leaching.
Roasting major technique condition：
Slag alkali ratio：100: 18, the grinding rate of slag：200 mesh are more than 60%, the particle size diameter after granulation：5~10mm, roasting
Temperature：1100 DEG C, residence time of material：3.7 hours.
By water logging process for extracting vanadium, a large amount of waste water are produced, waste component is extremely complex, many kinds of metal ions for containing, wherein wrapping
Include vanadium ion, the chromium ion of severe toxicity.The such as vanadium extracting waste water of certain chemical metallurgy factory is 1390mg/l containing chromium ion, and it is country
13,900 times of legal permitted emission quantity.
The content of the invention
One kind roasting process for extracting vanadium wastewater treatment equipment, its structure includes：Multi-effect evaporator, heated-air drying tower, chemical precipitation
Device.
Multi-effect evaporator is constituted by multiple evaporators are successive, and roasting process for extracting vanadium waste water first passes around multi-effect evaporator, completes
Initial concentration, enters back into heated-air drying tower, and hot-air carries out caloic and exchanges with waste water, and waste water is further concentrated, from bottom of towe stream
Go out, carry out crystallisation by cooling, supernatant enters chemical precipitation device, by reduction cell, neutralization chamber and sedimentation basin, precipitation is completed,
Supernatant qualified discharge.
The structure for being calcined process for extracting vanadium wastewater treatment equipment also includes：Slag hot-blast stove, by the red heat slag being calcined, into steel
Air is heated in slag hot-blast stove, air is heated to form hot-air outflow, hot-air is used for heated-air drying tower dried material.
The multi-effect evaporator, it is constituted by multiple evaporators are successive, and the structure of each evaporator includes：Steam (vapor) outlet,
Upper cover, upper perforated plate, waste water inlet, steam inlet, barrel, shell side, heat-transfer pipe, lower perforated plate, low head, wastewater outlet.
Roasting process for extracting vanadium waste water initially enters the tube side in first heat-transfer pipe of evaporator, is trickled downwards along inside pipe wall,
External heating steam enters first evaporator shell side, and steam is heated to the waste water in pipe, and waste water receives thermal evaporation, produces steam stream
Go out, enter into second evaporator as heating steam, flowed out after waste water is concentrated by evaporation in pipe, continue into second evaporator
Heating concentration；3rd, more evaporators all similarly by the use of previous evaporator produce steam as thermal source, to previous
Individual evaporator flows through the waste water for coming to be continued to heat concentration, and to the last an evaporator, completes from the waste water of wastewater outlet outflow
Multi-effect Evaporation Processes, residual steam flows out from steam (vapor) outlet.
The heated-air drying tower, it is a upright sealing steel cylinder, and its structure includes：It is waste water inlet, waste gas outlet, net
Change device, hot wind inlet, wastewater outlet, wastewater disposal basin.
Tower inner top has waste water spray equipment, and the waste water entered from tower top waste water inlet is sprayed downwards by shower nozzle into drizzle shape, tower
There is a hot wind inlet at bottom, and hot-air is flowed up in tower, forms hot blast, and hot blast heat release, waste water evaporation, waste water is continued
After concentration, from the outflow of bottom of towe wastewater outlet, into wastewater disposal basin crystallisation by cooling precipitation, supernatant flows out into chemical precipitation device,
Hot blast is last from the outflow of tower top waste gas outlet, is discharged after catalytic converter dust removal by filtration.
The chemical precipitation device, its structure includes：Reduction cell, neutralization chamber, sedimentation basin.
Waste water initially enters reduction cell through waste water inlet, and because the pH value of vanadium extracting waste water is 3 or so, chromium ion therein is big absolutely
Part is 6 valencys, ferrous sulfate is added by reduction cell, by 6 valency chromium ion Restore Alls into trivalent chromium ion, Ran Houjing
Wastewater outlet enters neutralization chamber, in neutralization chamber, by adding milk of lime, after regulation pH value to 8.5~9.0, trivalent chromium ion and
Other metal ions and calcium hydroxide reaction, the hydroxide precipitation of generation is in suspension, and sedimentation basin is imported by wastewater outlet,
Through after a while, precipitation is completed, supernatant discharge.
The slag hot-blast stove, its structure includes：Hot-blast outlet, slag charging aperture, runner, steel wire conveyer belt, housing,
Air intlet.
Driven by rotating wheel steel wire conveyer belt, falls on a moving belt from the slag of rotary kiln red heat out through slag charging aperture, air from
Side air intlet enters in housing, around slag, and with slag reverse flow, the two countercurrent flow, when air is heated to
Close to initial red heat slag temperature, as hot-air, flowed out from the opposite side hot-blast outlet of housing, hot-air is used for hot air drying
Dry tower.
Brief description of the drawings
The step of Fig. 1 is present invention roasting process for extracting vanadium method of wastewater treatment is schemed.
Fig. 2 is the overall pattern of present invention roasting process for extracting vanadium wastewater treatment equipment embodiment.
Fig. 3 is the multi-effect evaporator structure chart of present invention roasting process for extracting vanadium wastewater treatment equipment embodiment.
Fig. 4 is the hot-air drying device structure chart of present invention roasting process for extracting vanadium wastewater treatment equipment embodiment.
Fig. 5 is the chemical precipitation structure drawing of device that present invention roasting process for extracting vanadium waste water water manages device embodiment.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention is described in further detail.
The step of Fig. 1 gives present invention roasting process for extracting vanadium method of wastewater treatment is schemed.
The step of present invention roasting process for extracting vanadium method of wastewater treatment, is as follows：
1, first, waste water enters multi-effect evaporator 100, is evaporated concentration.Such as：100 tons of waste water, are concentrated by evaporation 4 times
Afterwards, it is left 25 tons, the steam that remaining evaporation is produced, then heat release is changed into condensate discharge.
2, enter heated-air drying tower 200 from the concentration waste water of the outflow of multi-effect evaporator 100.
3, in heated-air drying tower, concentration waste water is sprayed from the top down, and dry-heat air flows from bottom to top, and hot blast is passed to waste water
Heat, waste water is further concentrated by evaporation, and high-concentration waste water flows out from heated-air drying tower bottom, and after cooling, partially crystallizable, residue is useless
Current direction chemical precipitation device 400.
4, in chemical precipitation device 400, waste water initially enters reduction cell, with reduction medicament reaction, enters back into neutralization chamber, with
Medicament reaction is neutralized, suspension is formed, sedimentation basin is finally entered, precipitate and separate is carried out, supernatant qualified discharge, sediment is returned
Receive or otherwise processed.
5, the dry-heat air needed for heated-air drying tower, from slag hot-blast stove 300.In slag hot-blast stove 300, about 700 DEG C
Red heat v-bearing steel slag and the air heat-exchange from environment, about 600 DEG C of hot blast outflow is produced, for hot wind tower drying process.
Red heat v-bearing steel slag is the outlet of the rotary kiln from roasting technique.
Fig. 2 gives the present invention overall pattern of roasting process for extracting vanadium wastewater treatment equipment embodiment.
The totality of present invention roasting process for extracting vanadium wastewater treatment equipment embodiment, its structure includes：Multi-effect evaporator 100, heat
Wind drying tower 200, slag hot-blast stove 300, chemical precipitation device 400.
Multi-effect evaporator 100 is constituted by multiple evaporators are successive.Roasting process for extracting vanadium waste water enters from waste water inlet 101 first
Enter first tube side of evaporator, from top to bottom, trickled downwards along inside pipe wall in pipe, and heat steam from steam inlet
Shell side into outside first evaporator tube, heating steam is heated by tube wall to the waste water in pipe, and waste water receives thermal evaporation in pipe,
Steam is ramped up and risen in pipe, finally gathers evaporator top, is flowed out from steam (vapor) outlet, and enters into second evaporator
Steam inlet.Waste water is constantly concentrated by evaporation in pipe, is trickled downwards along inside pipe wall, base of evaporator is reached, from wastewater outlet
Outflow, subsequently enters second waste water inlet of evaporator.Second, the 3rd, all same utilization of more evaporators it is preceding
The steam that one evaporator is produced flows through the waste water for coming to previous evaporator and continues to heat concentration as thermal source, and to the last one
Individual evaporator, after completing whole Multi-effect Evaporation Processes from the waste water of the outflow of wastewater outlet 114, enters back into the continuation of heated-air drying tower
Concentration.
Heated-air drying tower 200 is a upright steel cylinder, and steel cylinder inner top has waste water spray equipment, enters from tower top water inlet 201
The waste water for entering is sprayed downwards by a shower nozzle into drizzle shape.Bottom of towe has a hot-air inlets, and under air blower drive, heat is empty
Gas is flowed up in tower, and hot blast carries out caloic and exchanges with the waste water of raindrop shape, hot blast heat release, and waste water evaporation, waste water is continued
Concentration, and wastewater disposal basin 204 is exited into from bottom of towe wastewater outlet 202, where crystallisation by cooling is precipitated.What can not be recrystallized is upper
Supernatant fraction, chemical precipitation device 400 is entered from water inlet 411, is continued with.
Chemical precipitation device 400 includes three parts：Reduction cell, neutralization chamber, sedimentation basin.
The waste water flowed into from heated-air drying tower initially enters reduction cell, because the pH value of vanadium extracting waste water is 3 or so, chromium therein
Ion is mostly 6 valencys, ferrous sulfate is added by reduction cell, by 6 valency chromium ion Restore Alls into trivalent chromium ion.
Subsequently into neutralization chamber.
In neutralization chamber, by adding milk of lime, regulation pH value to 8.5~9.0, trivalent chromium ion and other metal ions and hydrogen-oxygen
Change calcium reaction, the hydroxide precipitation of generation is in suspension, is conducted into sedimentation basin, through after a while, precipitation is completed, on
Clear liquid can qualified discharge.
Slag hot-blast stove 300 is made up of runner, steel wire conveyer belt, housing.From the slag of rotary kiln red heat out, by entering
Cinder notch 301 falls on a moving belt, and driven by rotating wheel steel wire transmission Tape movement, air enters in housing from side, and air surround slag,
And with slag reverse flow, the two countercurrent flow, when air is heated to close to red heat slag temperature, from the opposite side of housing
Gas outlet 302 is flowed out, and hot-air is used for heated-air drying tower drying material.
Fig. 3 gives the present invention multi-effect evaporator structure chart of roasting process for extracting vanadium wastewater treatment equipment embodiment.
Multi-effect evaporator 100 is constituted by multiple evaporators are successive, and each evaporator includes：Steam (vapor) outlet 109, upper cover
110th, upper perforated plate 111, waste water inlet 101, steam inlet 102, barrel 103, shell side 104, heat-transfer pipe 105, lower perforated plate
106th, low head 107, wastewater outlet 108.Roasting process for extracting vanadium waste water enters first evaporator from waste water inlet 101 first
Heat-transfer pipe 105 in tube side, from top to bottom, in pipe, trickled downwards along inside pipe wall, and heat steam and enter from steam
The shell sides 104 that mouth 102 enters outside first heat-transfer pipe of evaporator pipe, heating steam is heated by tube wall to the waste water in pipe, is managed
Interior waste water receives thermal evaporation, and steam is ramped up in pipe and risen, and finally gathers evaporator top, is flowed out from steam (vapor) outlet 109, and
Enter into second steam inlet of evaporator.Waste water is constantly concentrated by evaporation in pipe, is trickled downwards along inside pipe wall, reaches and steams
Hair device bottom, flows out from wastewater outlet 108, subsequently enters second waste water inlet of evaporator.Second, the 3rd, more
The all same steam by the use of the generation of previous evaporator of multiple evaporators flows through the waste water for coming as thermal source to previous evaporator
Continue to heat concentration, to the last an evaporator, whole Multi-effect Evaporation Processes are completed from the waste water of the outflow of wastewater outlet 114
Afterwards, heated-air drying tower is entered back into continue to concentrate.Residual steam bleeds off from steam outlet 113.
Fig. 4 gives the present invention hot-air drying device structure chart of roasting process for extracting vanadium wastewater treatment equipment embodiment.
The hot-air drying device of wastewater treatment equipment embodiment includes：Heated-air drying tower 200, slag hot-blast stove 300.
Heated-air drying tower 200 is a upright sealing steel cylinder, and its structure includes：Waste water inlet 201, waste gas outlet 207,
Clarifier 205, hot wind inlet 206, wastewater outlet 202, wastewater disposal basin 204.
Steel cylinder inner top has waste water spray equipment, from tower top waste water inlet 201 enter waste water by a shower nozzle into drizzle shape to
Lower spray.Bottom of towe has a hot wind inlet 206, air blower drive under, hot blast hot-air is flowed up in tower, hot blast with
The waste water of raindrop shape carries out caloic exchange, hot blast heat release, waste water evaporation, and waste water continues concentration, and from bottom of towe wastewater outlet 202
Outflow, into wastewater disposal basin 204, where crystallisation by cooling is precipitated.The supernatant fraction that can not be recrystallized, into chemical precipitation dress
400 are put, is continued with.Hot blast finally flows out from tower top waste gas outlet 207, through the dust removal by filtration of catalytic converter 205, then arranges
The air put.
Slag hot-blast stove 300 by hot-blast outlet 302, slag charging aperture 301, runner 357, steel wire conveyer belt 355, housing 354,
Air intlet 356 is constituted.Runner 357 drives steel wire conveyer belt 355, is fed through slag from the slag of rotary kiln red heat out
Mouth 301 falls on a moving belt, is driven movement, and air enters in housing 354 from side air intlet 356, around slag,
And with slag reverse flow, the two countercurrent flow, when air is heated to close to initial red heat slag temperature, from the another of housing
Side hot-blast outlet 302 flows out, and hot-air is used for heated-air drying tower.
Fig. 5 gives the chemical precipitation structure drawing of device that present invention roasting process for extracting vanadium waste water water manages device embodiment.
Chemical precipitation device 400 includes three parts：Reduction cell 410, neutralization chamber 420, sedimentation basin 430.
The waste water flowed into from heated-air drying tower initially enters reduction cell 410 through waste water inlet 411, because the pH value of vanadium extracting waste water exists
3 or so, chromium ion therein is mostly 6 valencys, ferrous sulfate is added by reduction cell, by 6 valency chromium ion wholes
Trivalent chromium ion is reduced into, then enters neutralization chamber 420 through wastewater outlet 412.
In neutralization chamber 420, by adding milk of lime, after regulation pH value to 8.5~9.0, trivalent chromium ion and other metal ions
With calcium hydroxide reaction, the hydroxide precipitation of generation is in suspension, and sedimentation basin 430 is imported by wastewater outlet 421, is passed through
For a period of time, precipitation 431 is fully completed, and supernatant can qualified discharge.
Claims (5)
1. a kind of to be calcined process for extracting vanadium wastewater treatment equipment, its structure includes：Multi-effect evaporator, heated-air drying tower, chemistry are heavy
Shallow lake device；Multi-effect evaporator is constituted by multiple evaporators are successive, and roasting process for extracting vanadium waste water first passes around multi-effect evaporator,
Initial concentration is completed, heated-air drying tower is entered back into, hot-air carries out caloic and exchanges with waste water, and waste water is further concentrated, from tower
Bottom is flowed out, and carries out crystallisation by cooling, and supernatant enters chemical precipitation device, by reduction cell, neutralization chamber and sedimentation basin, precipitated
Into supernatant qualified discharge, it is characterised in that：The structure for being calcined process for extracting vanadium wastewater treatment equipment also includes：Slag hot-blast stove,
Through roasting red heat slag, into slag hot-blast stove in air heat, air be heated to form hot-air outflow, hot-air quilt
For heated-air drying tower dried material.
2. according to the roasting process for extracting vanadium wastewater treatment equipment described in claim 1, it is characterised in that：The multi-effect evaporator,
It is constituted by multiple evaporators are successive, and the structure of each evaporator includes：Steam (vapor) outlet, upper cover, upper perforated plate, waste water
Import, steam inlet, barrel, shell side, heat-transfer pipe, lower perforated plate, low head, wastewater outlet；Roasting process for extracting vanadium waste water is first
The tube side in first heat-transfer pipe of evaporator is introduced into, is trickled downwards along inside pipe wall, external heating steam enters first
Evaporator shell side, steam is heated to the waste water in pipe, and waste water receives thermal evaporation, produces steam outflow, enters into second evaporator
As heating steam, flowed out after waste water is concentrated by evaporation in pipe, continue to heat concentration into second evaporator；3rd, it is more
The steam that individual evaporator is all similarly produced by the use of previous evaporator as thermal source, previous evaporator is flowed through the waste water for coming after
Continuous heating concentration, to the last an evaporator, Multi-effect Evaporation Processes, residual steam are completed from the waste water of wastewater outlet outflow
From steam (vapor) outlet outflow.
3. according to the roasting process for extracting vanadium wastewater treatment equipment described in claim 1, it is characterised in that：The heated-air drying tower,
It is a upright sealing steel cylinder, and its structure includes：Waste water inlet, waste gas outlet, clarifier, hot wind inlet, waste water
Outlet, wastewater disposal basin；Tower inner top has waste water spray equipment, from tower top waste water inlet enter waste water by shower nozzle into drizzle shape to
Lower spray, bottom of towe has a hot wind inlet, and hot-air is flowed up in tower, forms hot blast, and hot blast heat release, waste water evaporates,
After waste water continues concentration, from the outflow of bottom of towe wastewater outlet, into wastewater disposal basin crystallisation by cooling precipitation, flowing out into of supernatant
Settler is learned, hot blast finally flows out from tower top waste gas outlet, discharged after catalytic converter dust removal by filtration.
4. according to the roasting process for extracting vanadium wastewater treatment equipment described in claim 1, it is characterised in that：The chemical precipitation device,
Its structure includes：Reduction cell, neutralization chamber, sedimentation basin；Waste water initially enters reduction cell through waste water inlet, due to vanadium extracting waste water
PH value 3 or so, chromium ion therein is mostly 6 valencys, by reduction cell add ferrous sulfate, by 6 valencys
Then chromium ion Restore All enters neutralization chamber into trivalent chromium ion through wastewater outlet, in neutralization chamber, by adding milk of lime,
To after 8.5~9.0, trivalent chromium ion and other metal ions and calcium hydroxide reaction, the hydroxide of generation are precipitated regulation pH value
In suspension, sedimentation basin is imported by wastewater outlet, through after a while, precipitation is completed, supernatant discharge.
5. according to the roasting process for extracting vanadium wastewater treatment equipment described in claim 1, it is characterised in that：The slag hot-blast stove,
Its structure includes：Hot-blast outlet, slag charging aperture, runner, steel wire conveyer belt, housing, air intlet；Driven by rotating wheel steel
Silk conveyer belt, falls on a moving belt from the slag of rotary kiln red heat out through slag charging aperture, and air enters from side air intlet
Enter in housing, around slag, and with slag reverse flow, the two countercurrent flow, when air is heated to close to initial red heat steel
Slag temperature, as hot-air, flows out from the opposite side hot-blast outlet of housing, and hot-air is used for heated-air drying tower.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108211706A (en) * | 2018-02-12 | 2018-06-29 | 山东大学 | A kind of desulphurization denitration and wastewater zero discharge system and method for steel industry |
| CN110078169A (en) * | 2019-06-10 | 2019-08-02 | 成渝钒钛科技有限公司 | A kind of vanadium extraction plant area zero emission method of wastewater |
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