CN208545218U - A kind of purification device of waste liquid from bromine extraction - Google Patents
A kind of purification device of waste liquid from bromine extraction Download PDFInfo
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- CN208545218U CN208545218U CN201820597306.3U CN201820597306U CN208545218U CN 208545218 U CN208545218 U CN 208545218U CN 201820597306 U CN201820597306 U CN 201820597306U CN 208545218 U CN208545218 U CN 208545218U
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Abstract
The utility model discloses a kind of purification devices of waste liquid from bromine extraction, including salt slurry selecting device, waste liquid from bromine extraction inlet control valve, reaction tank, coagulation device, air-floating apparatus, wherein, salt slurry selecting device includes sequentially connected salt slurry settling tank, salt slurry delivery pump, cyclone separator, salt slurry storage tank and salt slurry metering pump with stirring, salt slurry metering pump is connected to reaction tank after waste liquid from bromine extraction inlet control valve, reaction tank is sequentially connected coagulation tank and air-floating apparatus by air bearing intake pump, and coagulant dosing tank and flocculant dosing tank are connect with coagulation tank respectively by metering pump.Can effectively realize waste liquid pH value after adjusting mentions bromine using utility model device and reduce the purpose of its turbidity, and do not change mention bromine after waste liquid original other compositions composition, there is good environmental benefit.
Description
Technical field
The utility model relates to a kind of purification devices of waste liquid from bromine extraction, and it is acid to adjust waste liquid from bromine extraction especially with waste brine sludge
And reduce the device of turbidity.
Background technique
Seawater and brine, which are important, mentions bromine raw material.Usual seawater mentions bromine using the seawater after concentration, works as concentrated seawater
When middle bromine concentration reaches extracting concentration, appropriate method is selected to extract.Brominated brine is also to mention one of bromine raw material, Bohai Sea Gulf south bank
Area's subsurface brine is resourceful, and bromine content is high, is important the bromine place of production, brine constituent is similar with seawater, each group
The content divided is 3~4 times in seawater.The common technology of seawater or bittern bromine has bromine method of blowing, liquid-film method, air-blowing method, inhales
Attached dose of method, aniline process and ion-exchange-resin process etc. are most widely used wherein blowing bromine method.
Blowing bromine method to extract the common method of bromine is simple substance bromine to be displaced from seawater or brine using chlorine, then use air
Blowout.This method generates a large amount of acid waste liquid after mentioning bromine, and pH reaches 2~3.Propose bromine front and back seawater or brine main component
It is basically unchanged, but waste liquid from bromine extraction has the shortcomings that acid high, corrosivity is strong, pollution environment, therefore after cannot being directly used in
Continuous technique, direct emission then will affect periphery ecology, and welding and soil pollute, so must purified treatment.Brine
The pH value of waste liquid from bromine extraction and typical composition are shown in Table 1.
The pH value of 1 bittern bromine waste liquid of table and typical composition (mass percent)
The acidity of waste liquid from bromine extraction is easy to eliminate, such as is neutralized using alkaline matter, but very due to waste liquid from bromine extraction amount
Greatly, by taking 8 ° of B é bittern bromines as an example, waste liquid from bromine extraction 9000m3 or so will be discharged by extracting 1 ton of bromine, be disappeared using alkaline chemical method
Except consumption when it is acid is very big, purification is costly, and secondary pollution easily is generated to waste liquid from bromine extraction, so promoting difficulty
Greatly；Simultaneously as waste liquid from bromine extraction mainly contains various salt components, direct purposes is seldom, is mostly directly discharged in environment, relies on
After natural environment gradually eliminates acid, clarification purification, it is used further to salt manufacturing, value of the product is lower, therefore there is presently no economy
The purification method of reliable waste liquid from bromine extraction.
The chemical enterprises such as soda ash, chlor-alkali, vacuum salt production are needed in process of production using refined brine (saturated sodium-chloride
Aqueous solution), refined brine is using the salt water of water dissolved solid crude salt formation as made from raw material, and the major solute of salt water is chlorination
Sodium, in addition containing foreign ions and silts, organic matter and other impurity not soluble in water such as more calcium, magnesium, sulfate radicals, therefore
It needs to refine.The chemical method of salt refining at present has ammonium carbonate method, lime-ammonium carbonate method, lime-soda method, lime-saltcake
Method and caustic soda-Method of Soda, to remove the impurity in salt water.During with chemical method refined brine, usually generate a large amount of
Waste, is commonly called as salt slurry, and the main component of salt slurry is Mg (OH)2、Ca(OH)2、CaSO4、CaCO3、Al2O3, silt and be dissolved in water
NaCl, MgCl2、CaCl2、Na2SO4Equal salts and other materials.Salt slurry is used as solid waste to be discharged mostly at present, throughout the year
Accumulation, does not only take up large amount of land resources, and can also generate adverse effect to ecological environment around.The comprehensive utilization of waste brine sludge
It is also the important topic of environment protection treating.
Utility model content
The technical problem to be solved by the present invention is to provide it is a kind of using waste brine sludge adjust waste liquid from bromine extraction pH value device,
For solving, waste liquid from bromine extraction is acid high, corrosivity is strong, pollution environment, cannot be normally received by subsequent technique or safety dumping
Problem.
In order to solve the above technical problems, the utility model includes salt slurry selecting device, waste liquid from bromine extraction inlet control valve, reaction
Pond, coagulation device, air-floating apparatus, are structurally characterized in that, salt slurry selecting device includes that sequentially connected salt slurry settling tank, salt slurry are defeated
Pump, cyclone separator, salt slurry storage tank and salt slurry metering pump with stirring are sent, salt slurry metering pump is after waste liquid from bromine extraction inlet control valve
It is connected to reaction tank, reaction tank is sequentially connected coagulation tank and air-floating apparatus, coagulant dosing tank and flocculation by air bearing intake pump
Agent dosing tank is connect with coagulation tank respectively by metering pump.
A coagulating basin is additionally provided between reaction tank and air bearing intake pump, coagulant dosing tank is measured by another
Pump is connect with a coagulating basin.
The reaction tank reacts material sufficiently using stirring or aeration mode, and the salt slurry storage tank, coagulant add
The included stirring of medicine-chest, flocculant dosing tank, guarantees that wherein material component is uniform.
The air-floating apparatus is high molten gas efficiency, low reflux ratio air-floating apparatus, controls molten 90% or more gas efficiency, molten gas
Water reflux ratio 5%~18%.It is preferred that molten gas efficiency > 92%, air-floating apparatus of the dissolved air water reflux ratio control 5~12%.
The course of work of the utility model waste liquid from bromine extraction purification device includes the following steps:
(1) waste brine sludge generated during chemical method salt refining is sent into salt slurry settling tank, is layered after being allowed to rest for, given up
It abandons supernatant liquor and sends crude salt mud exhaust system back to, obtain lower layer's suspension；
(2) lower layer's suspension that step (1) obtains is delivered to cyclone separator, removes the biggish silt of specific gravity, obtains
Selected waste brine sludge；
(3) the selected waste brine sludge that step (2) obtains is added using metering pump according to the amount of every cube of 3~5kg of waste liquid from bromine extraction
Enter in waste liquid from bromine extraction (pH value 2~3), keeps selected waste brine sludge and waste liquid from bromine extraction sufficiently mixed in reaction tank by stirring or being aerated
It closes, reaction, the residence time 6~60 minutes, obtains the waste liquid from bromine extraction of pH value 5.0~8.0；
(4) waste liquid from bromine extraction that step (3) obtains is intake by air bearing and is pumped into air-floating apparatus coagulation tank, addition 10~
The inorganic polymer coagulant of 20ppm carries out coagulation, and 0~1.5ppm organic flocculant is added in the coagulation later period, passes through flocculation
By fine suspension flocculation at big closely knit wadding body, waste liquid from bromine extraction is controlled at 15~20 minutes in coagulation tank total residence time, is obtained
Waste liquid from bromine extraction after to flocculation；
(5) waste liquid from bromine extraction enters air-floating apparatus from coagulation tank and drops turbid processing after the flocculation obtained by step (4), using Gao Rong
Gas efficiency, low reflux ratio air-float technology, control molten 90% or more gas efficiency, and dissolved air water reflux ratio 5%~18% will finally mention bromine and give up
Liquid turbidity is down to 3NTU hereinafter, pH value 6.0-8.0 weakly acidic pH waste liquid from bromine extraction after being purified.
The waste brine sludge generated during chemical method salt refining described in the above method, preferably lime-soda method, stone
The waste brine sludge that ash-ammonium carbonate method or caustic soda-Method of Soda generate.In waste brine sludge refining process, supernatant liquor is gradually formed under
Layer suspension.It is demonstrated experimentally that supernatant liquor is although aobvious alkalinity, to adjusting, waste liquid from bromine extraction acidity effect is unobvious, and lower layer is outstanding
Turbid active constituent content is high, works well when eliminating waste liquid from bromine extraction acidity, it is miscellaneous other solids can be removed by cyclonic separation
It is used after matter.This selected waste brine sludge is influenced by material quality, and solid content is generally 9~17%.Alkalinity in selected waste brine sludge
Ingredient is not only excellent pH adjusting agent, and has good effect of flocculant, and subsequent purification efficiency can be improved, to silicon, iron
Compound has good adsorption effect, and removal rate reaches 90% or more, has to component contents such as silicon, iron in reduction waste liquid from bromine extraction aobvious
Write effect.
To reinforce reaction effect, selected waste brine sludge is added to waste liquid from bromine extraction the above method, using stirring or aeration
Mode keeps selected waste brine sludge evenly dispersed, is sufficiently mixed and reacts with waste liquid from bromine extraction.
Due to the close (see Table 2) of main component of the waste brine sludge and waste liquid from bromine extraction that are generated during salt refining, waste brine sludge
The process for adjusting waste liquid from bromine extraction acidity does not have new component and brings the secondary pollution for causing waste liquid from bromine extraction into.The solid that waste brine sludge is brought into
Suspended matter can remove during air bearing drop is turbid together with other suspended matters original in waste liquid from bromine extraction, will not influence subsequent make
With.It can achieve the good result of the treatment of wastes with processes of wastes against one another by the method.
The pH value of 1 butt salt slurry of table and typical composition
Because of the addition of waste brine sludge in the above method, increase the turbidity of waste liquid from bromine extraction, in order to not influence waste liquid from bromine extraction
Subsequent applications, it is necessary to carried out dropping turbid processing.If using the method for natural sedimentation, not only need larger settlement space,
Time-consuming, and easy cooperating microorganisms.In contrast, air flotation technology can efficiently, rapidly remove the various suspended matters in water body,
Including waste liquid from bromine extraction suspended impurity that is original and newly bringing into, turbidity is effectively reduced.
Air bearing process described in the above method is reduced high in water body using high molten gas efficiency, low reflux ratio air-float technology
Influence of the salt content to air bearing process.The technology that air bearing is applied to water body with high salt is rarely found.Inventor tests discovery, when in water
Salt content can largely effect on molten gas effect when being greater than 6%, i.e. salt content is higher, and molten gas is more difficult, and dissolved air water quality is also poorer, together
When big reflux ratio the stability of wadding body during high content of salt water body air bearing can be affected greatly, and increase power consumption.
Therefore waste liquid from bromine extraction purification with high salt needs high molten gas efficiency, low reflux ratio air-float technology.Through a large number of experiments, waste liquid from bromine extraction passes through gas
The processing of floating technology, turbidity can be down to 3 NTU hereinafter, meeting subsequent technique requirement.
Peracidity waste liquid from bromine extraction with high salt can be purified by using above-mentioned apparatus, the sour corrosion of waste liquid significantly reduces, and
And various suspended matters can be effectively removed, and purified waste liquid from bromine extraction is extremely clarified, and turbidity significantly reduces, by purified treatment,
Waste liquid from bromine extraction quality greatly improves, and is used directly for evaporating brine, vacuum salt production and other techniques using salt water, purifies cost
Cheap, the treatment of wastes with processes of wastes against one another has significant environmental benefit.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples:
Fig. 1 is utility model device schematic diagram.
1. waste liquid from bromine extraction in Fig. 1,2. waste brine sludges, 3. salt slurry settling tanks, 4. lower layer's suspensions, 5. supernatant liquors, 6. salt
Mud delivery pump, 7. cyclone separators, 8. silt particles, 9. selected waste brine sludges, 10. salt slurry storage tanks (belt stirrer), the metering of 11. salt slurries
Pump, 12. waste liquid from bromine extraction inlet control valves, 13. reaction tanks, 14.1#pH meter, 15. coagulating basins, 16.2#pH meter, 17. air bearings
Intake pump, 18. coagulation tanks, 19. coagulant dosing tanks, 20.1# coagulant dosing metering pump, 21.2# coagulant dosing metering pump,
22. flocculant dosing tank, 23. flocculant dosing metering pumps, 24. air-floating apparatus, 25. purified waste liquid from bromine extraction.
Specific embodiment
Embodiment 1
Referring to attached drawing 1, the purification device of the waste liquid from bromine extraction, including it is salt slurry selecting device, waste liquid from bromine extraction inlet control valve, anti-
Ying Chi, coagulation device, air-floating apparatus.Salt slurry selecting device includes sequentially connected salt slurry settling tank 3, salt slurry delivery pump 6, eddy flow
Separator 7, salt slurry storage tank 10 and salt slurry metering pump 11 with stirring, salt slurry metering pump 11 is after waste liquid from bromine extraction inlet control valve 12
It is connected to reaction tank 13, reaction tank 13 is sequentially connected coagulation tank 18 and air-floating apparatus 24 by air bearing intake pump 17, and coagulant adds
Medicine-chest 19 is connect by metering pump 21 with coagulation tank, and flocculant dosing tank 22 is connect by metering pump 23 with coagulation tank, reaction tank
A coagulating basin is additionally provided between 13 and air bearing intake pump 17, coagulant dosing tank 19 is mixed by a metering pump 20 and once
Solidifying pond connection, the outlet of reaction tank 13 are provided with 1#pH meter 14, and an outlet of coagulating basin 15 is provided with 2#pH meter 16, waste liquid from bromine extraction 1
System is entered by control valve 12, salt slurry 2 enters system by salt slurry settling tank 3, and purified waste liquid from bromine extraction 25 is by air-floating apparatus 24
Discharge system；Air-floating apparatus is using dissolved air floatation efficiency > 92%, and the control of dissolved air water reflux ratio is filled in 5~12% shallow air-floatation
It sets.
Technical process: in the present embodiment, waste brine sludge is obtained by soda manufacture salt refining process, butt each component content:
Referring to Fig.1, waste brine sludge 2 initially enters salt slurry settling tank 3, and supernatant liquor 5 is given up after layering, takes lower layer's suspension 4,
It is sent into cyclone separator 7 by salt slurry delivery pump 6, the separation removal biggish silt 8 of specific gravity obtains selected waste brine sludge 9, selected useless
Salt slurry 9 is sent into salt slurry storage tank 10, and the included stirring of salt slurry storage tank 10 guarantees that wherein waste brine sludge ingredient is uniform, and waste liquid from bromine extraction 1 passes through control
Valve 12 processed enters reaction tank 13, and selected waste brine sludge is added after control valve 12, and dosage is controlled by salt slurry metering pump 11, mentions bromine
Waste liquid and waste brine sludge are sufficiently reacted in reaction tank 13 by aeration, stirring etc., when reaction tank water outlet pH reaches 5.0~7.5,
Into a coagulating basin 15, the inorganic polymer coagulant that 5ppm is added thereto by 1# coagulant dosing metering pump 20 is carried out
Coagulation, coagulation time are no less than 5 minutes, when a coagulating basin 15 is discharged pH and reaches 6.0~8.0, pass through air bearing intake pump
Waste liquid from bromine extraction is sent into air-floating apparatus coagulation tank 18 by 17, is then added by 2# coagulant dosing metering pump 21 into coagulation tank 18
The inorganic polymer coagulant of 10ppm carries out second coagulation, passes through flocculant dosing metering pump 23 again to coagulation in the coagulation later period
0.8ppm organic flocculant is added in slot 18, the waste liquid from bromine extraction after flocculation drops turbid processing from coagulation tank 18 into air-floating apparatus 24,
Final waste liquid from bromine extraction turbidity is down to 1.8~2.3NTU, and pH value is between 6.0~8.0.The salt slurry supernatant liquor 5 and eddy flow given up
The silt 8 isolated sends crude salt mud exhaust system uniform effluent back to after mixing.
Embodiment 2
The present embodiment device is substantially the same manner as Example 1, and the main distinction in this present embodiment, is reducing a coagulating basin
15, reaction tank 13, which is discharged, is directly sent into air-floating apparatus coagulation tank 18 by air bearing intake pump 17, the air-floating apparatus 24 in the present embodiment
To use molten gas efficiency > 90%, advection air-floating apparatus of the dissolved air water reflux ratio control 8~18%.
Technical process: in the present embodiment, waste brine sludge is obtained by chlor-alkali production salt refining process, butt each component content:
Referring to Fig.1, waste brine sludge 2 initially enters salt slurry settling tank 3, and supernatant liquor 5 is given up after layering, takes lower layer's suspension 4,
It is sent into cyclone separator 7 by salt slurry delivery pump 6, the separation removal biggish silt 8 of specific gravity obtains selected waste brine sludge 9, selected useless
Salt slurry 9 is sent into salt slurry storage tank 10, and the included stirring of salt slurry storage tank 10 guarantees that wherein waste brine sludge ingredient is uniform, and waste liquid from bromine extraction 1 passes through control
Valve 12 processed enters reaction tank 13, and selected waste brine sludge is added after control valve 12, and salt slurry dosage is 4.5kg/m3, and dosage passes through
Salt slurry metering pump 11 controls, and waste liquid from bromine extraction and waste brine sludge pass through the sufficiently reaction such as aeration, stirring, control reaction in reaction tank 13
Residence time about 12 minutes, when reaction tank water outlet pH reaches 5.5~6.5, waste liquid from bromine extraction is sent by air bearing intake pump 17
Then the inorganic high score of 15ppm is added in air-floating apparatus coagulation tank 18 by 2# coagulant dosing metering pump 21 into coagulation tank 18
Sub- coagulant carries out coagulation, and passing through flocculant dosing metering pump 23 again in the coagulation later period, that 1.5ppm is added into coagulation tank 18 is organic
Flocculant, the waste liquid from bromine extraction after flocculation drop turbid processing from coagulation tank 18 into air-floating apparatus 24, and final waste liquid from bromine extraction turbidity is down to
2.0~3.0NTU, pH value are 6.0~6.5.
Claims (5)
1. a kind of purification device of waste liquid from bromine extraction, including salt slurry selecting device, waste liquid from bromine extraction inlet control valve, reaction tank, coagulation
Device, air-floating apparatus, which is characterized in that salt slurry selecting device includes sequentially connected salt slurry settling tank, salt slurry delivery pump, eddy flow
Separator, salt slurry storage tank and salt slurry metering pump with stirring, salt slurry metering pump are connected to instead after waste liquid from bromine extraction inlet control valve
Ying Chi, reaction tank are sequentially connected coagulation tank and air-floating apparatus, coagulant dosing tank and flocculant dosing tank by air bearing intake pump
It is connect respectively with coagulation tank by metering pump.
2. the purification device of waste liquid from bromine extraction according to claim 1, which is characterized in that between reaction tank and air bearing intake pump
It is additionally provided with a coagulating basin, coagulant dosing tank is connect by another metering pump with a coagulating basin.
3. the purification device of waste liquid from bromine extraction according to claim 1 or 2, which is characterized in that the air-floating apparatus is height
Molten gas efficiency, low reflux ratio air-floating apparatus control molten 90% or more gas efficiency, dissolved air water reflux ratio 5%~18%.
4. the purification device of waste liquid from bromine extraction according to claim 1 or 2, which is characterized in that the air-floating apparatus is molten
Gas efficiency > 92%, air-floating apparatus of the dissolved air water reflux ratio control 5~12%.
5. the purification device of waste liquid from bromine extraction according to claim 1 or 2, which is characterized in that the reaction tank is using exposure
Gas or agitating mode react material sufficiently, and the salt slurry storage tank, coagulant dosing tank, flocculant dosing tank are included to be stirred
It mixes.
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| CN201820597306.3U CN208545218U (en) | 2018-04-25 | 2018-04-25 | A kind of purification device of waste liquid from bromine extraction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114409144A (en) * | 2022-03-29 | 2022-04-29 | 山东海化集团有限公司 | Method and device for treating acidic wastewater after bromine extraction by using waste salt slurry |
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2018
- 2018-04-25 CN CN201820597306.3U patent/CN208545218U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114409144A (en) * | 2022-03-29 | 2022-04-29 | 山东海化集团有限公司 | Method and device for treating acidic wastewater after bromine extraction by using waste salt slurry |
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