CN109795996A - A kind of phosphoric acid by wet process vulcanization arsenic removal purification device and method - Google Patents
A kind of phosphoric acid by wet process vulcanization arsenic removal purification device and method Download PDFInfo
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- CN109795996A CN109795996A CN201910233474.3A CN201910233474A CN109795996A CN 109795996 A CN109795996 A CN 109795996A CN 201910233474 A CN201910233474 A CN 201910233474A CN 109795996 A CN109795996 A CN 109795996A
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- phosphoric acid
- vulcanizing agent
- purification device
- reactor tank
- wet process
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- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 229910000147 aluminium phosphate Inorganic materials 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 46
- 229910052785 arsenic Inorganic materials 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 29
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000000746 purification Methods 0.000 title claims abstract description 26
- 238000004073 vulcanization Methods 0.000 title claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 56
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 239000007787 solid Substances 0.000 claims abstract description 14
- 230000008676 import Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000000243 solution Substances 0.000 claims description 37
- 238000011001 backwashing Methods 0.000 claims description 20
- 239000002002 slurry Substances 0.000 claims description 17
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 13
- 238000001556 precipitation Methods 0.000 claims description 13
- 239000011259 mixed solution Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 22
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 16
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 16
- 238000003756 stirring Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 7
- HAYXDMNJJFVXCI-UHFFFAOYSA-N arsenic(5+) Chemical compound [As+5] HAYXDMNJJFVXCI-UHFFFAOYSA-N 0.000 description 7
- 239000011575 calcium Substances 0.000 description 7
- 229910052791 calcium Inorganic materials 0.000 description 7
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 6
- 238000001914 filtration Methods 0.000 description 4
- 230000033116 oxidation-reduction process Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000003556 assay Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- PBSJABOJCQOSCL-UHFFFAOYSA-N [As].P(O)(O)(O)=O Chemical compound [As].P(O)(O)(O)=O PBSJABOJCQOSCL-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000010882 bottom ash Substances 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052958 orpiment Inorganic materials 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of phosphoric acid by wet process vulcanization arsenic removal purification device and methods, including screw conveyor, vulcanizing agent feed bin, venturi mixer, reactor tank and equipment for separating liquid from solid；Vulcanizing agent enters vulcanizing agent feed bin, the vulcanizing agent import being arranged on vulcanizing agent bin outlet connection venturi mixer by screw conveyor；Venturi mixer outlet connection reactor tank import, reactor tank outlet connection equipment for separating liquid from solid；Phosphoric acid solution import is also set up on venturi mixer；Compressed air inlet is set on vulcanizing agent feed bin；Reactor tank is gas check.Tradition stirring is replaced by using venturi mixer, so that various materials uniformly mix in venturi mixer, occupation area of equipment is small, non-power consumption, saves the energy and cost.Meanwhile reactor tank is gas check and vulcanizing agent does not need to be individually configured to solution, effectively prevents the spilling of the hydrogen sulfide gas generated in reaction, improves execute-in-place safety and protection environment.
Description
Technical field
The invention belongs to phosphoric acid industry field, it is related to a kind of phosphoric acid by wet process vulcanization arsenic removal purification device and method.
Background technique
Phosphoric acid is widely used in the every field such as medicine, chemical industry, food as chemical industry base stock.But phosphoric acid by wet process
Due to its impurity content height, the other field that can not be applied to other than chemical industry.Arsenic is mainly derived from phosphorus in phosphoric acid by wet process
Ore, it is different according to the quality of rock phosphate in powder, slightly fluctuate.Though the content of arsenic is small, its presence often produces subsequent phosphate
The quality of product produces bigger effect, and is one of the impurity of more difficult removal in phosphoric acid.The main method of phosphoric acid arsenic removal has chemistry heavy
Shallow lake method, solvent extraction, ion-exchange etc..
Chemical precipitation method is one of the most widely used method in all multi-methods at present.Vulcanizing agent is added in phosphoric acid,
So that arsenic ion and sulphion generate arsenones precipitating.The existing vulcanization arsenic removing apparatus that generally uses in phosphoric acid by wet process industry by
Mixing channel and subsider composition, under usual production operation, vulcanizing agent and phosphoric acid are filled in mixing channel by mechanical stirring realization
Divide reaction, hydrogen sulfide gas spilling is had during vulcanization reaction, influences execute-in-place safety and environment；Meanwhile whole device
It is limited to the technique limitation of mechanical stirring and natural subsidence, occupied area is larger.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of phosphoric acid by wet process vulcanization arsenic removal purification dress is provided
It sets and method.
In order to achieve the above objectives, the present invention is achieved by the following scheme:
A kind of phosphoric acid by wet process vulcanizes arsenic removal purification device, including screw conveyor, vulcanizing agent feed bin, venturi mixer,
Reactor tank and equipment for separating liquid from solid；
Vulcanizing agent import is set on screw conveyor, and it is mixed that screw conveyor outlet is sequentially connected vulcanizing agent feed bin, venturi
Clutch, reactor tank and equipment for separating liquid from solid；Phosphoric acid solution import is also set up on venturi mixer；Pressure is set on vulcanizing agent feed bin
Contracting air intlet；Reactor tank is gas check.
A further improvement of the present invention lies in that:
Equipment for separating liquid from solid is subsider.
Equipment for separating liquid from solid includes slurry slot, liquid tank and exports sequentially connected filter liquid feeding pump and oneself with reactor tank
Dynamic backwash surface filter；
Slurry slot and liquid tank are separately connected slurry outlet and the purified liquor outlet of automatic back-washing surface filter.
Filter liquid feeding pump is pneumatic diaphragm pump, the automatic back-washing surface filter, reactor tank, slurry slot and liquid tank
It is all made of the production of acid-alkali-corrosive-resisting material.
Equipment for separating liquid from solid further includes ORP analyzer, and ORP analyzer is arranged in filter feed liquor pump discharge and automatic back-washing
On pipeline between surface filter import；ORP analyzer is connect with screw conveyor.
Purification device further includes blender, and blender and reactor tank are tightly connected, for the mixed liquor in stirred tank.
Blender is ultrasonic stirrer.
Purification device further includes electromagnetic flowmeter, and the phosphoric acid solution inlet tube of venturi mixer is arranged in electromagnetic flowmeter
On, for detecting the liquid inlet volume of phosphoric acid solution.
Aperture is set at the top of reactor tank, and aperture connects the gas feed being arranged on venturi mixer, pipeline by pipeline
With aperture flanged joint.
The invention also discloses a kind of phosphoric acid by wet processes to vulcanize arsenic removal purification method, comprising the following steps:
Step 1: venturi mixer is added by electromagnetic flowmeter in phosphoric acid solution containing arsenic to be processed and measures additional amount；
Meanwhile vulcanizing agent is added to vulcanizing agent feed bin by screw conveyor, vulcanizing agent enters venturi under Venturi effect and mixes
Device is mixed with phosphoric acid solution containing arsenic to be processed, forms mixed solution A；The additional amount of vulcanizing agent can make ORP analyzer reading steady
It is scheduled on preset value；
Step 2: mixed solution A gravity flow enters reactor tank and reacts, and forms sulfide precipitation and treated phosphoric acid solution；
Step 3: by the sulfide precipitation in step 2, phosphoric acid solution is delivered to automatic back-washing surface mistake jointly with treated
Filter, by sulfide precipitation, phosphoric acid solution is separated with treated；
Step 4: sulfide precipitation being delivered to slurry slot, phosphoric acid solution is delivered to liquid tank by treated.
Compared with prior art, the invention has the following advantages:
Purification device of the present invention replaces tradition stirring by using venturi mixer, so that various materials are in venturi
It is uniformly mixed in mixer, occupation area of equipment is small, non-power consumption, saves the energy and cost.Reactor tank is gas check, is had
The spilling for preventing the hydrogen sulfide gas generated in reaction of effect improves execute-in-place safety and protection environment.Using spiral
Conveyer, vulcanizing agent feed bin and compressed air are used cooperatively, and the addition rate of vulcanizing agent is controlled by screw conveyor, makes to react
Object proportion is more reasonable；Meanwhile vulcanizing agent does not need to be individually configured to solution, avoids vulcanizing agent in configuration process and reacts with water
Influence of the hydrogen sulfide gas of generation to system safety, improves the safety of device.
Further, use automatic back-washing surface filter as equipment for separating liquid from solid, principle is positive membrane filtration, accounts for
Ground area is small, and filter cycle is short, and filtering accuracy is high, is able to achieve automatic discharge in the process of running, and bottom ash enters the progress of slurry slot
Subsequent centralized processing, cleaning are convenient.
Further, chain using ORP analyzer and screw conveyor, reaction optimum state is determined by long-play
It determines that ORP reading is oxidation-reduction potential afterwards, measurement information is sent to screw conveyor, is controlled and is conveyed by screw conveyor
Calcium sulfide additional amount maintains ORP analyzer data stabilization, keeps the entire reaction process controllability stronger, reacts more abundant.
Further, catalysis reaction is carried out to mixed liquor from molecular level using ultrasonic stirrer, so that between material
It is sufficiently mixed, reacts, accelerate reaction efficiency.
Further, it is equipped with aperture at the top of reactor tank, is connected to the gas feed being arranged on venturi mixer, venturi
The hydrogen sulfide gas that the negative pressure that mixer generates generates reactor tank sucks, and is recycled into reactor tank, harmful hydrogen sulfide gas
Can be used as vulcanizing agent, the reaction was continued, and safety is improved, and reaction is also more abundant.
Purification method of the present invention measures oxidation-reduction potential numerical value in chemical reaction process, first basis by ORP analyzer
Longtime running situation combination assay determines that one has completely been reacted arsenic ion, while the ORP overflowed without hydrogen sulfide is surveyed
Determine instrument reading, which is the preset value of ORP analyzer.When phosphoric acid solution flow or arsenic content fluctuate, ORP measurement
Instrument reading changes, at this point, increasing or reducing the rate of screw conveyor conveying vulcanizing agent, until ORP analyzer is maintained to read
Number is stablized in preset value, and the additional amount of control vulcanizing agent is passed through, it is ensured that arsenic ion reaches while effectively remove, and avoids vulcanizing agent
The excessive danger for generating a large amount of hydrogen sulfide gas and generating is added, guarantees the safety of staff.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the device of the invention process for using block diagram.
Wherein: 1- electromagnetic flowmeter；2- screw conveyor；3- vulcanizing agent feed bin；4- venturi mixer；5- blender；
6- reactor tank；7- filter liquid feeding pump；8-ORP analyzer；9- slurry slot；10- liquid tank；11- automatic back-washing surface filter.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
The invention will be described in further detail with reference to the accompanying drawing:
Referring to Fig. 1 and 2, a kind of phosphoric acid by wet process of the present invention vulcanizes arsenic removal purification device, including electromagnetic flowmeter 1, spiral transferring
Send machine 2, vulcanizing agent feed bin 3, venturi mixer 4, ultrasonic stirrer 5, reactor tank 6, filter liquid feeding pump 7, ORP analyzer
8, slurry slot 9, liquid tank 10, automatic back-washing surface filter 11.
After phosphoric acid solution to be processed passes through phosphoric acid solution inlet tube, entered by 4 phosphoric acid solution import of venturi mixer
Venturi mixer 4, and the electromagnetic flowmeter 1 by being arranged on phosphoric acid solution inlet tube detects phosphoric acid solution liquid inlet volume；Together
When, quantitative vulcanizing agent is delivered to vulcanizing agent feed bin 3 by screw conveyor 2, is blown by compressed air into vulcanizing agent feed bin 3
Gas is sent vulcanizing agent to venturi mixer 4 by the vulcanizing agent import being arranged on venturi mixer 4.
Phosphoric acid solution is realized in venturi mixer 4 with vulcanization calcium powder to flow automatically into reactor tank 6, instead after solid-liquid mixes
Answering tank 6 is gas check, effectively prevents the excessive of the hydrogen sulfide gas that reaction generates, while being equipped with blender 5, blender
5 can select ultrasonic stirrer, carry out catalysis reaction to mixed liquor from molecular level using ultrasonic wave agitating device, accelerate anti-
Answer efficiency.Aperture is equipped at the top of reactor tank 6, aperture connects 4 feed inlet of venturi mixer, excessive hydrogen sulfide by pipeline
Gas is recycled into reactor tank 6 as vulcanizing agent under the tiny structure effect of venturi mixer 4, and the reaction was continued.Aperture and pipeline
It is attached by flange.
The outlet of reactor tank 6 connection filter liquid feeding pump 7, while in the outlet of filter liquid feeding pump 7 and automatic back-washing surface mistake
ORP analyzer 8 is installed, ORP analyzer 8 and screw conveyor 2 are chain, and formation controls back on the pipeline between 11 import of filter
Road；Helical feed 2, which is controlled, according to the measurement information of ORP analyzer 8 conveys calcium sulfide additional amount.It is determined by long-play anti-
ORP reading, i.e. oxidation-reduction potential are determined after answering optimum state, and calcium sulfide additional amount is conveyed by control helical feed 2 to tie up
Hold the data stabilization of ORP analyzer 8.Mixed solution enters automatic back-washing surface filter 11 under the action of the pump pressure of 0.2MPa
Realize forced filtration, filter cake is periodically discharged into slurry slot 9 under the PLC program of automatic back-washing surface filter, and clear liquid enters clear liquid
Slot 10.
Electromagnetic flowmeter 1 uses the product of resistance to phosphoric acid corrosion.It is molten into phosphoric acid that venturi mixer 4 designs a main inlet
Liquid；Two branch mouths, respectively into vulcanization calcium powder and the excessive hydrogen sulfide gas of reactor tank.Filter liquid feeding pump 7 using pneumatically every
Membrane pump, acid-alkali-corrosive-resisting.Automatic back-washing surface filter 11, reactor tank 6 are all made of 316L stainless steel material processing and fabricating.Slurry
Slot 9 and liquid tank 10 are all made of 316L material processing and fabricating.It is all in this purification device to be all made of with phosphoric acid solution contact site
Resistance to phosphoric acid corrosion material production.
Tradition stirring is replaced by using venturi mixer, so that various materials are uniformly mixed in venturi mixer
It closes, occupation area of equipment is small, non-power consumption.It is used cooperatively using screw conveyor 2, vulcanizing agent feed bin 3 with compressed air, sulphur
Agent does not need to be individually configured to solution, avoids vulcanizing agent in configuration process and reacts the hydrogen sulfide gas generated with water to system
The influence of safety.Wherein, vulcanizing agent can select vulcanization calcium powder, using calcium sulfide as vulcanizing agent, send out during the reaction
Raw following reaction:
As3++S2-=As2S3↓Ca2++PO4 3-=Ca3(PO4)2↓
The calcium ion introduced in the reaction as the calcium sulfide of vulcanizing agent is also precipitated as calcium phosphate, passes through automatic back-washing table
After solid-liquid separation is filtered in face, other ions are not introduced in phosphoric acid arsenic removal.
It is equipped with bleeding point flange at the top of reactive tank 6, venturi mixer branch feed inlet is connected to, when phosphoric acid liquid passes through
When, the hydrogen sulfide gas that the negative pressure that venturi mixer generates generates reactive tank sucks, and is recycled into reactive tank, harmful sulphur
Change hydrogen can be used as vulcanizing agent, and the reaction was continued.
Use automatic back-washing surface filter 11 as equipment for separating liquid from solid, principle is positive membrane filtration, occupied area
Small, filter cycle is short, and filtering accuracy is high, is able to achieve automatic discharge in the process of running, and bottom ash enters slurry slot 9 and carries out subsequent set
Middle processing, cleaning are convenient.
The invention also discloses a kind of phosphoric acid by wet processes to vulcanize arsenic removal purification device, comprising the following steps:
Step 1: venturi mixer 4 is added by electromagnetic flowmeter 1 in phosphoric acid solution containing arsenic to be processed and measures addition
Amount；Meanwhile vulcanizing agent is added to vulcanizing agent feed bin 3 by screw conveyor 2, in the present embodiment, vulcanizing agent selects vulcanization calcium powder
End, because the negative pressure that Venturi effect is formed absorbs the vulcanization calcium powder in vulcanizing agent feed bin 3 in venturi mixer 4,
Phosphoric acid solution to be processed and vulcanization calcium powder are sufficiently mixed in venturi mixer 4, form mixed solution A；Vulcanize calcium powder
Additional amount can make 8 stable reading of ORP analyzer in preset value；According to longtime running situation combination assay, one is determined
Arsenic ion is reacted completely, while the ORP analyzer 8 overflowed without hydrogen sulfide is read, which is the pre- of ORP analyzer 8
If value.
Step 2: mixed solution A gravity flow enter reactor tank 6 react, under the action of ultrasonic stirrer 5, calcium sulfide with to
The arsenic ion reaction in phosphoric acid solution is handled, sulfide precipitation is formed and forms sulfide precipitation and treated phosphoric acid solution；And
By the gas generated in reaction process being mixed with mixed solution A by being delivered to venturi mixer 4 by 6 top of reactor tank
It closes.
Step 3: by the sulfide precipitation in step 2, phosphoric acid solution is delivered to automatic back-washing surface mistake jointly with treated
Filter 11 is delivered to automatic back-washing surface filter, under pump pressure, forced filtration is realized, rapidly by sulfide precipitation and processing
Phosphoric acid solution separation afterwards.
Step 4: sulfide precipitation being delivered to slurry slot 9, phosphoric acid solution is delivered to liquid tank 10 by treated.
Pass through the additional amount of control vulcanizing agent, it is ensured that arsenic ion reaches while effectively remove, and vulcanizing agent is avoided to be added
Amount generates the danger that a large amount of hydrogen sulfide gas generate.The ORP interlock for devising a kind of control vulcanizing agent additional amount is installed at
After reactor tank 6 on depot siding, ORP analyzer 8 can measure oxidation-reduction potential numerical value in chemical reaction process, first according to long-term
Operating condition combination assay determines that one has completely been reacted arsenic ion, while without the ORP analyzer of hydrogen sulfide spilling
8 readings, the numerical value are the preset value of ORP analyzer 8.When phosphoric acid solution flow or arsenic content fluctuate, ORP analyzer
8 readings change, and increase or reduce the rate of screw conveyor conveying vulcanizing agent, until maintaining 8 stable reading of ORP analyzer
Near preset value, resource utilization is improved, improves safety.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (10)
1. a kind of phosphoric acid by wet process vulcanizes arsenic removal purification device, which is characterized in that including screw conveyor (2), vulcanizing agent feed bin
(3), venturi mixer (4), reactor tank (6) and equipment for separating liquid from solid；
Vulcanizing agent import is set on screw conveyor (2), and screw conveyor (2) outlet is sequentially connected vulcanizing agent feed bin (3), literary mound
In mixer (4), reactor tank (6) and equipment for separating liquid from solid；Venturi mixer also sets up phosphoric acid solution import on (4)；Vulcanization
Compressed air inlet is arranged on (3) in agent feed bin；Reactor tank (6) is gas check.
2. phosphoric acid by wet process according to claim 1 vulcanizes arsenic removal purification device, which is characterized in that the equipment for separating liquid from solid
For subsider.
3. phosphoric acid by wet process according to claim 1 vulcanizes arsenic removal purification device, which is characterized in that the equipment for separating liquid from solid
Sequentially connected filter liquid feeding pump (7) and automatic back-washing are exported including slurry slot (9), liquid tank (10) and with reactor tank (6)
Surface filter (11)；
Slurry slot (9) and liquid tank (10) are separately connected slurry outlet and the purified liquor outlet of automatic back-washing surface filter (11).
4. phosphoric acid by wet process according to claim 3 vulcanizes arsenic removal purification device, which is characterized in that the filter liquid feeding pump
It (7) is pneumatic diaphragm pump, the automatic back-washing surface filter (11), reactor tank (6), slurry slot (9) and liquid tank (10) are equal
It is made of acid-alkali-corrosive-resisting material.
5. phosphoric acid by wet process according to claim 3 vulcanizes arsenic removal purification device, which is characterized in that the equipment for separating liquid from solid
It further include ORP analyzer (8), ORP analyzer (8) setting is in filter liquid feeding pump (7) outlet and automatic back-washing surface filter
(11) on the pipeline between import；ORP analyzer (8) is connect with screw conveyor (2).
6. phosphoric acid by wet process according to claim 1-5 vulcanizes arsenic removal purification device, which is characterized in that the purification
Device further includes blender (5), and blender (5) and reactor tank (6) are tightly connected, for the mixed liquor in stirred tank.
7. phosphoric acid by wet process according to claim 6 vulcanizes arsenic removal purification device, which is characterized in that the blender (5) is
Ultrasonic stirrer.
8. phosphoric acid by wet process according to claim 1-5 vulcanizes arsenic removal purification device, which is characterized in that the purification
Device further includes electromagnetic flowmeter (1), and electromagnetic flowmeter (1) is arranged on the phosphoric acid solution inlet tube of venturi mixer, is used
In the liquid inlet volume of detection phosphoric acid solution.
9. phosphoric acid by wet process according to claim 1-5 vulcanizes arsenic removal purification device, which is characterized in that the reaction
Aperture is set at the top of tank (6), and aperture connects the gas feed being arranged on venturi mixer (4), pipeline and aperture by pipeline
Flanged joint.
10. a kind of phosphoric acid by wet process based on claim 5 described device vulcanizes arsenic removal purification method, which is characterized in that including with
Lower step:
Step 1: venturi mixer (4) are added by electromagnetic flowmeter (1) in phosphoric acid solution containing arsenic to be processed and measure addition
Amount；Meanwhile vulcanizing agent is added to vulcanizing agent feed bin (3) by screw conveyor (2), vulcanizing agent enters text under Venturi effect
Mixer (4) is mixed with phosphoric acid solution containing arsenic to be processed in mound, forms mixed solution A；The additional amount of vulcanizing agent can be such that ORP surveys
Instrument (8) stable reading is determined in preset value；
Step 2: mixed solution A gravity flow enters reactor tank (6) and reacts, and forms sulfide precipitation and treated phosphoric acid solution；
Step 3: by the sulfide precipitation in step 2, phosphoric acid solution is delivered to automatic back-washing surface filter jointly with treated
(11), by sulfide precipitation, phosphoric acid solution is separated with treated；
Step 4: sulfide precipitation being delivered to slurry slot (9), by treated, phosphoric acid solution is delivered to liquid tank (10).
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| CN201910233474.3A CN109795996A (en) | 2019-03-26 | 2019-03-26 | A kind of phosphoric acid by wet process vulcanization arsenic removal purification device and method |
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| CN201910233474.3A CN109795996A (en) | 2019-03-26 | 2019-03-26 | A kind of phosphoric acid by wet process vulcanization arsenic removal purification device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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