CN106621167A - Process and system for electric-field synergy stabilizing treatment of multivalence arsenic-containing waste residue - Google Patents
Process and system for electric-field synergy stabilizing treatment of multivalence arsenic-containing waste residue Download PDFInfo
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- CN106621167A CN106621167A CN201611211689.8A CN201611211689A CN106621167A CN 106621167 A CN106621167 A CN 106621167A CN 201611211689 A CN201611211689 A CN 201611211689A CN 106621167 A CN106621167 A CN 106621167A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/10—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by subjecting to electric or wave energy or particle or ionizing radiation
- A62D3/11—Electrochemical processes, e.g. electrodialysis
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
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Abstract
The invention provides a process and system for electric-field synergy stabilizing treatment of multivalence arsenic-containing waste residue. The method comprises the following steps: step 1: adding an oxidizing agent into the arsenic-containing waste residue with a water content being 50-70% and stirring to enable arsenic to be subjected to oxidizing reaction; applying an electric field to the arsenic-containing waste residue while adding the oxidizing agent, wherein a cathode of the electric field is positioned in the middle of the arsenic-containing waste residue, and an anode is positioned around the arsenic-containing waste residue, such that anions in the anion are migrated and aggregated to the anode; step 2: removing the electric field after the oxidizing reaction of the arsenic in the arsenic-containing waste residue is finished, then adding a stabilizing agent into the arsenic-containing waste residue and stirring, such that the arsenic in the arsenic-containing waste residue is reacted to be stabilized, and therefore, an arsenic compound that exists stably is obtained, wherein in the steps 1 and 2, percolate of the arsenic-containing waste residue is always filtered and collected. The process for the electric-field synergy stabilizing treatment of multivalence arsenic-containing waste residue is low in cost and wide in processing range, and the processed arsenic-containing waste residue is small in capacity-increase ratio and has no secondary pollution.
Description
Technical field
The present invention relates to the process field of waste residue, and in particular to a kind of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue
Technique and system.
Background technology
Waste residue yield that selecting and purchasing smelting industry is produced is big and with higher Leaching Heavy Metals, as high-grade mineral products are provided
The progressively exhaustion in source, the new pollution sources containing arsenic solid waste of heavy metal discharged in selecting and purchasing smelting industry production process will further dash forward
It is aobvious.Arsenic smoke dust, arsenic alkaline slag, waste acid slag, the arsenic filter cake produced in the tailings, the smelting process that such as produce in mining, ore dressing process
Waste residue containing arsenic will be more and more, and pile up like a mountain.And if these arsenic-containing waste residues are dealt carefully with not in time, containing in arsenic-containing waste residue
Arsenic enters environmental attack vegetation, pollution arable land, groundwater resources, seriously jeopardizes the healthy and safe of ecological environment or even the mankind.According to
This, China exists《National Program for Medium-to Long-term Scientific and Technological Development（2006～the year two thousand twenty）》In point out the preferential of environmental area
The pollution treatment of thematic emphasis comprehensive study and recycling waste, develop the resources such as abnormal pollution control technology, discarded object
Using technology, heavy polluted industry clean manufacture integration technology etc..Therefore the handling process of practical multivalent state arsenic-containing waste residue is developed
And device, for stabilization processes arsenic-containing waste residue, arsenic and its heavy metal contaminants diffusion are prevented, to building harmonious " amphitypy " society
Not only it is extremely urgent but also of far-reaching significance, both possessed economic worth or possessed social value.
At present, the processing method of the arsenic-containing waste residue for coexisting for multivalent state is mainly limited to calcining solidification, cement solidification two
Big class.To say objectively, the method operating cost energy consumption of direct high-temperature calcination is too high, up to hundreds of per cubic metre of units, and the height calcined
Warm process has the volatilization of arsenic is difficult to control to the secondary pollution and thermal pollution of arsenic；Although the method for cement solidification as more into
Ripe method is widely used, but the arsenic-containing waste residue higher for toxicity is reduced to standard, and the cement addition of needs is big, after process
Volume often increases 2-5 times than original, and so too high increase-volume causes white elephant than also giving subsequently to fill and store up.
The content of the invention
To overcome the problems referred to above and deficiency, one purpose of the present invention is to provide a kind of low cost, non-secondary pollution, process
Technique of the increase-volume than a kind of little electric field synergistic stabilization processes multivalent state arsenic-containing waste residue afterwards.
For achieving the above object, the invention provides a kind of work of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue
Skill, comprises the following steps：Step one：Arsenic is made to water content to add oxidant in the arsenic-containing waste residue of 50%-70% and being stirred
Generation oxidation reaction；Electric field is accommodated to arsenic-containing waste residue while addition oxidant, the negative electrode of the electric field is located at arsenic-containing waste residue
Middle part, anode is located at the surrounding of arsenic-containing waste residue so that the anion in arsenic-containing waste residue is assembled to anode migration；Step 2：It is useless containing arsenic
Arsenic in slag cancels electric field after oxidation reaction is finished, then adds stabilizer in arsenic-containing waste residue and stir, in making arsenic-containing waste residue
Arsenic react and stabilize arsenic, so as to obtain the compound of the arsenic of stable existence；Wherein, in the step one and step 2
In, the percolate of arsenic-containing waste residue is collected by filtration all the time.
Preferably, the addition volume of the oxidant is less than or equal to 1 with the ratio of the volume of the arsenic-containing waste residue arsenic:10,
The oxidant includes one or more in liquor potassic permanganate, hydrogen peroxide solution, and the mass fraction of the oxidant is
10%-30%, the acidified process of the oxidant, acid used by the acidification is one or more in sulfuric acid, nitric acid.
Preferably, the addition of the stabilizer is 0.2-0.3 times of the arsenic-containing waste residue quality, the stabilizer is negative
Carry the biological straw of iron.
Preferably, the arsenic-containing waste residue is the arsenic-containing waste residue containing multivalent state arsenic.
Preferably, stabilizer is made by the steps：（1）It is 1 by molysite and biological straw mass ratio:5-1:7 backups;
（2）The molysite for having backed up is mixed with biological straw to carry out mechanical ball mill and sieves to obtain stabilizer.
Preferably, the molysite is one or more in iron chloride, ferric sulfate, bodied ferric sulfate.Wherein, iron chloride,
Ferric sulfate, bodied ferric sulfate are technical grade reagent.
Another object of the present invention is to provide a kind of system of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue, bag
Include：Reacting tank body, is provided with waste residue charging aperture, oxidant feed mouth, stabilizer charging aperture, percolate and goes out on the reacting tank body
Mouth and waste residue outlet；
Agitating device, the agitating device includes being arranged on the paddle inside the reacting tank body；
Electric field generating means, the negative electrode of the electric field that the electric field generating means are produced is located at the reacting tank body center, the electricity
The anode of the electric field that field generating means are produced is located at the outside of reacting tank body.Preferably, the electric field generating means include being located at
Graphite electrode in reacting tank body and the metal electrode lines being wrapped in outside the side wall of the reacting tank body, the metal electrode lines
For copper cash；
Liquid collection bath, the liquid collection bath is connected to the percolate outlet.
Preferably, the bottom of the reacting tank body have the first diapire, the second diapire and be formed in first diapire and
Liquid storage space between second diapire, is provided with filter opening, the percolate outlet and the liquid storage space on first diapire
Connection；Preferably, filter opening can be replaced with filter screen circle, and filter screen circle is close to the side wall of reacting tank body 100.
Preferably, the liquid storage space is provided with flow-guiding structure, the upper surface of the flow-guiding structure is from the reacting tank body
Interior middle part is gradually lowered towards the side wall of the reacting tank body, and the percolate outlet is arranged on the side wall of the reacting tank body
On.
Preferably, the waste residue outlet is positioned at the lower end center of the reacting tank body, the paddle of the paddle is configured to：
When the blade is rotated clockwise, the blade pushes material to the side wall of the reacting tank body, when the blade it is counterclockwise
During rotation, the blade pushes material to the central axis of the reacting tank body.
The technique of the electric field synergistic stabilization processes multivalent state arsenic-containing waste residue that the present invention is provided has the advantages that：
（1）The step of accommodating electric field to arsenic-containing waste residue while employing addition oxidant, the electric field of blessing can make to be given up containing arsenic
Anion in slag is gathered into the percolate of High Concentration of Arsenic to the anode migration of electric field, and the percolate of part High Concentration of Arsenic is filtered
Collect, percolate and the oxidant of other parts react, because the anion that percolate have accumulated substantial amounts of arsenic improves arsenic
With the reaction speed of oxidant.The oxidation migration collaboration of this electric field causes arsenic content in arsenic-containing waste residue to reduce, and fundamentally drops
The dissolution rate of arsenic, reduces the treating capacity of arsenic in low arsenic-containing waste residue, saves cost；Simultaneously this technique is processed many
The arsenic-containing waste residue of valence state, high concentration, process range is wide, strong applicability；
（2）Using the biological straw of load iron as stabilizer, the stabilizer has larger specific surface area, improve arsenic with it is steady
The reaction efficiency of agent is determined so as to reduce the addition of stabilizer, save cost, while so that the arsenic-containing waste residue body after processing
Product expansion is little, that is, the increase-volume of the arsenic-containing waste residue after processing is than little；
（3）This technique is whole to be separated with heavy metal by arsenic and is achieved resource without waste gas and dust generation, the percolate collected
And no wastewater discharge, so that this technique non-secondary pollution.
To sum up, the present invention provide electric field synergistic stabilization processes multivalent state arsenic-containing waste residue process costs are low, process range
Extensively, the arsenic-containing waste residue increase-volume after processing is than little, non-secondary pollution.
Description of the drawings
Fig. 1 is that the entirety of the system preferred embodiment of the electric field synergistic stabilization processes multivalent state arsenic-containing waste residue of the present invention is shown
It is intended to；
Fig. 2 is that the technique of the electric field synergistic stabilization processes multivalent state arsenic-containing waste residue of the present invention combines electric field synergistic stabilization processes
The second step schematic diagram of the system of multivalent state arsenic-containing waste residue；
Fig. 3 combines electric field synergistic stabilization processes multivalence for the technique of Fig. 2 electric field synergistic stabilization processes multivalent state arsenic-containing waste residues
The partial enlarged drawing of the second step schematic diagram of the system of state arsenic-containing waste residue；
Fig. 4 is that the technique of the electric field synergistic stabilization processes multivalent state arsenic-containing waste residue of the present invention combines electric field synergistic stabilization processes
The schematic diagram of the 3rd step of the system of multivalent state arsenic-containing waste residue；
Fig. 5 combines electric field synergistic stabilization processes multivalence for the technique of Fig. 4 electric field synergistic stabilization processes multivalent state arsenic-containing waste residues
The partial enlarged drawing of the schematic diagram of the 3rd step of the system of state arsenic-containing waste residue.
In Fig. 1,100：Reacting tank body；110：Waste residue charging aperture；111：Belt conveyor；112：First pipeline； 120：Oxygen
Agent charging aperture；121：Measuring pump；122：Second pipe；123：Nozzle；124：Valve；130：Stabilizer charging aperture；131：Spiral shell
Rotation conveyer；132：3rd pipeline；140：Percolate is exported；150：Waste residue is exported；160：First diapire；170：Second diapire；
180：Liquid storage space；181：Flow-guiding structure；190：Electronic measuring scale；200：Agitating device；210：Paddle；211：Paddle；
220：Motor；300 electric field generating means；310：Graphite electrode；320：Metal electrode lines；400：Liquid collection bath.
Specific embodiment
With reference to embodiment, the present invention is described in detail.If it should be noted that not conflicting, the present invention is implemented
Each feature in example and embodiment can be combined with each other, within protection scope of the present invention.
Embodiment 1
With reference to Fig. 1, a kind of system of the electric field synergistic stabilization processes multivalent state arsenic-containing waste residue provided the present invention is illustrated：
A kind of system of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue, including：Reacting tank body 100, on reacting tank body 100
It is provided with waste residue charging aperture 110, oxidant feed mouth 120, stabilizer charging aperture 130, percolate outlet 140 and waste residue outlet
150.First pipeline 112 of the connection with belt conveyor 111 of waste residue charging aperture 110；The connection of oxidant feed mouth 120 is with meter
The second pipe 122 of amount pump 121, oxidant discharging opening 120 is additionally provided with nozzle 123, and nozzle 123 is placed in reacting tank body 100；Surely
Determine threeth pipeline 132 of the connection with conveying worm 131 of agent charging aperture 130.First pipeline 112, second pipe 122（Valve
124, other valves are not marked one by one）, the 3rd pipeline 132 be equipped with valve.Waste residue charging aperture 110, oxidant feed mouth 120,
Stabilizer charging aperture 130, percolate outlet 140 and waste residue outlet 150 are equipped with valve.The bottom of reacting tank body 100 is additionally provided with electricity
Sub- weigher 190, electronic measuring scale 190 connects respectively belt conveyor 111, conveying worm 131.
The system of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue also includes：Agitating device 200, agitating device 200
Including the paddle 210 being arranged on inside reacting tank body；Paddle 210 is provided with blade 211, and paddle 211 is configured to：Work as blade
211 when rotating clockwise, and the blade 211 pushes material to the side wall of reacting tank body, when blade 211 is rotated counterclockwise, should
Blade 211 pushes material to the central axis of reacting tank body；Blade 211 is preferably SIGMA type blades.
The system of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue also includes：Electric field generating means 300, electric field is generated
Device 300 includes graphite electrode 310 and metal electrode lines 320, and graphite electrode 310 is located at the center of reacting tank body 100 and connects electricity
Source negative electrode, metal electrode lines 320 are wound in outside the side wall of reacting tank body 100 and connect power anode.When threshold electric field generating means
During 300 power supply, the electric field that the side wall of reacting tank body 100 is radiated towards the center of reacting tank body 100 is formed, now graphite electrode 310 is electricity
Field negative electrode, the side wall of reacting tank body 100 are electric field anode, and power supply is the direct current less than or equal to 200V, and metal electrode lines are copper
Line.
The system of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue also includes：Liquid collection bath 400, liquid collection bath
400 are connected to percolate outlet 140.
Preferably, the bottom of reacting tank body 100 has the first diapire 160, the second diapire 170 and is formed in the first diapire
160 and the second liquid storage space 180 between diapire 170, percolate outlet 140 is connected with liquid storage space 180.First diapire 160
On be provided with filter opening, filter opening can be replaced with filter screen circle, and filter screen circle is close to the side wall of reacting tank body 100；Waste residue outlet 150 is vertically passed through
Wear the center of liquid storage space 180.
Preferably, liquid storage space 180 is provided with flow-guiding structure 181, the upper surface of flow-guiding structure 181 is from reacting tank body 100
The side wall of interior middle part orientating reaction tank body 100 is gradually lowered, and percolate outlet 140 is arranged on the side wall of reacting tank body 100.
Embodiment 2
Present invention also offers a kind of technique of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue, comprises the following steps：
Step one：Make arsenic that oxidation reaction to occur to add oxidant in the arsenic-containing waste residue of 50%-70% and being stirred to water content；
Electric field is accommodated to arsenic-containing waste residue while addition oxidant, the negative electrode of electric field is located at the middle part of arsenic-containing waste residue, and anode is located at and contains arsenic
The surrounding of waste residue is so that the anion in arsenic-containing waste residue is assembled to anode migration.Wherein, the addition volume of oxidant is useless with containing arsenic
The ratio of the volume of slag arsenic is less than or equal to 1:10, oxidant includes one or more in liquor potassic permanganate, hydrogen peroxide solution,
The mass fraction of oxidant is 10%-30%, and the acidified process of oxidant, acid used by acidification is in sulfuric acid, nitric acid
Plant or various；
Step 2：Arsenic in arsenic-containing waste residue cancels electric field after oxidation reaction is finished, then adds stabilizer simultaneously in arsenic-containing waste residue
Continue to stir, make the arsenic in arsenic-containing waste residue react and stabilize arsenic, so as to obtain the compound of the arsenic of stable existence.It is stable
The addition of agent is 0.2-0.3 times of arsenic-containing waste residue quality, and stabilizer is the biological straw of load iron.Wherein, the stabilisation of arsenic
It is the reaction for making arsenic become the compound of the arsenic of stable existence.
In step one and step 2, the percolate of arsenic-containing waste residue is collected by filtration all the time.When in arsenic-containing waste residue
When arsenic content is high, electric field accommodates and causes the anion in arsenic-containing waste residue to form High Concentration of Arsenic solution or arsenic mistake to anode migration aggregation
Saturated solution, the supersaturated solution of arsenic separates out arsenic, and the arsenic of precipitation is dissolved in the aqueous solution and High Concentration of Arsenic solution of oxidant
Together it is collected by filtration.The aqueous solution of aqueous oxidizing agent solution, High Concentration of Arsenic solution and arsenic-containing waste residue itself is all arsenic-containing waste residue
Percolate.
Preferably, stabilizer is made by the steps：It is 1 that molysite is first pressed with biological straw mass ratio:5-1：7 backups,
The molysite for having backed up is mixed with biological straw again carry out mechanical ball mill and sieve to obtain stabilizer.
Preferably, molysite is one or more in iron chloride, ferric sulfate, bodied ferric sulfate.
Preferably, arsenic-containing waste residue is the arsenic-containing waste residue containing multivalent state arsenic.
The arsenic-containing waste residue of process is plate and frame filter press, belt filter press, the wet slag of centrifugal separator output, arsenic-containing waste residue
Moisture content scope is 50%-70%, meets this technological requirement, it is not necessary to carry out dehydration reprocessing to arsenic-containing waste residue, simplify technique
So as to save cost；Arsenic in arsenic-containing waste residue is mainly in the form of the anion of arsenic.
The synergy of electric field causes the salt content of the percolate for discharging arsenic-containing waste residue system higher.Soluble state in waste residue
Arsenic and inorganic salts have discharged system in the case where electric field migrates and stir the driving effect of extruding with percolate, reduce total arsenic in waste residue
With the content of total salt, the dissolution rate of arsenic in system is fundamentally reduced.The precipitation arsenic re-dissolved that so moves in circles is collected,
The arsenic content in arsenic-containing waste residue system is greatly reduced, reducing needs the total amount of stabilization processes arsenic, coordinate the technical process
Arsenic-containing waste residue percolate can be collected in order to reclaim and resource so that whole technique can process high concentration, no
With the arsenic-containing waste residue of the arsenic of valence state, process range is big, with very strong applicability.
Embodiment 3
With reference to Fig. 2, Fig. 4, and the system of the process arsenic-containing waste residue that the present invention is provided is combined to electric field synergistic stabilization processes multivalence
The technique of state arsenic-containing waste residue is described in detail.
The first step：Arsenic-containing waste residue is delivered to waste residue charging aperture 110 and enters into reacting tank body 100 by belt conveyor 111
Interior, the addition of arsenic-containing waste residue is less than the half of the volume of reacting tank body 100.Wherein, the connection of belt conveyor 111 electronic measurement
Scale 190, electronic metering pump 190 metering reacting tank body 100 increase weight, when the weight of the increase of reacting tank body 100 reach it is pre-
After determining arranges value, the feedback electronic signal of electronic measuring scale 190 come close belt conveyor 111 stop arsenic-containing waste residue conveying, this
Sample has reached the purpose of metering arsenic-containing waste residue.
Second step：Start the stirring arsenic-containing waste residue of motor 220, threshold electric field generating means 300, then matter is added to arsenic-containing waste residue
The liquor potassic permanganate through sulfuric acid acidification of amount fraction 25%.Liquor potassic permanganate Jing measuring pumps 121 are measured and by
One pipeline 122 is delivered to oxidant feed mouth 120, is slowly sprayed to arsenic-containing waste residue from nozzle 123 again, liquor potassic permanganate volume
For the 8% of arsenic-containing waste residue volume；After liquor potassic permanganate is added to be finished, continue to stir and close after arsenic-containing waste residue 20min electric field electricity
Source.The mixing speed of the paddle 210 being connected with motor 220 is 1-3rpm, mixing direction is clockwise, the up time of paddle 210
Arsenic-containing waste residue is pushed to the side wall of reacting tank body 100 to squeeze out the aqueous solution of arsenic-containing waste residue, the water of arsenic-containing waste residue by pin when stirring
Solution, liquor potassic permanganate（Liquor potassic permanganate after finishing including the liquor potassic permanganate in oxidation reaction and oxidation reaction）
All it is the percolate of arsenic-containing waste residue.
3rd step：After closing power supply, in arsenic-containing waste residue stabilizer is added（The biological straw of load iron）, then improve stirring
The rotating speed of oar 210 to 5-10rpm, stabilizer addition are 0.25 times of arsenic-containing waste residue quality, and stabilizer Jing conveying worms 131 are counted
Stabilizer charging aperture 130 is delivered to after amount, is entered back in reacting tank body 100 and is stablized arsenic with the arsenic reaction of remaining in arsenic-containing waste residue
Change, stabilizer is added after finishing, continue switching paddle 210 after stirring arsenic-containing waste residue 10min and turn to stir counterclockwise, stir
Arsenic-containing waste residue is pushed towards waste residue outlet 150 when oar 210 is stirred counterclockwise, waste residue exports complete after 150 dispatch arsenic-containing waste residues are finished
Into the process of an arsenic-containing waste residue.Wherein, the connection of conveying worm 131 electronic measuring scale 190, electronic metering pump 190 is measured instead
Answer tank body 100（Including arsenic-containing waste residue）The weight of increase, after the weight of the increase of reacting tank body 100 reaches predetermined set value,
The feedback electronic signal of electronic measuring scale 190 come close conveying worm 131 stop arsenic-containing waste residue conveying, so reached metering
The purpose of stabilizer；
Arsenic-containing waste residue after process carries out the Leaching of arsenic and detects that [Leaching is detected according to GB5085.3-2007《Danger is useless
Thing judging standard leaching characteristic identification》Detection], detection learns that the arsenic Leaching of arsenic-containing waste residue is less than 2.5mg/L；After process
The volumetric expansion that the volume of arsenic-containing waste residue compares the arsenic-containing waste residue of before processing is little, that is, the arsenic-containing waste residue increase-volume after processing is than little.
The whole percolate to arsenic-containing waste residue is collected in the first step, second step, the 3rd step, and percolate is collected in
The Jing percolates of liquid storage space 180 export 140 and are discharged to liquid collection bath 400, and the percolate Jing that liquid collection bath 400 is collected is concentrated
The resource of percolate is realized in process.
With reference to Fig. 2, Fig. 3, Fig. 4, Fig. 5 are specifically described to the principle of this technique：First add to arsenic-containing waste residue and aoxidize
Agent simultaneously accommodates electric field and is stirred, and wherein oxidant makes arsenic carry out oxidation reaction, and most representational arsenic oxidation reaction is AsO3-
3 are oxidized to AsO3- 4；The positive pole of the electric field of blessing is located at outside the side wall of retort so that AsO3- 3, AsO3- 4, Cl-Deng
Anion is discharged collection towards the percolate cocurrent filtration ring net that the side wall of retort is gathered into high concentration, simultaneously because electric field is just
Pole have accumulated the anion of a large amount of arsenic, indirectly accelerate arsenic oxidation reaction speed.When arsenic content is higher in arsenic-containing waste residue, electricity
The percolate of arsenic-containing waste residue can form the supersaturated solution of arsenic so as to separate out arsenic at the positive pole of field, and the arsenic of precipitation is re-dissolved in oxidation
The aqueous solution of agent is discharged collection, and what is so moved in circles arsenic is separated out dissolving discharge, in greatly reducing arsenic-containing waste residue
Arsenic content, enables this technique to apply to high concentration, the process of the arsenic-containing waste residue of multivalent state arsenic.
After oxidation reaction is finished, electric field is closed, add stabilizer（The biological straw of load iron）, the iron in stabilizer with contain
The anion of the grade arsenic of AsO3- 4 of remaining reacts in arsenic waste residue（Fe3++ AsO3- 4FeAsO4 ）, generate and stably deposit
Arsenic compound（FeAsO4Deng the compound of arsenic）, so that the Leaching value of arsenic in the arsenic-containing waste residue after process
It is little, reach the standard of arsenic-containing waste residue discharge.
The electric field synergistic stabilization processes multivalent state arsenic-containing waste residue process costs for providing of the invention are low, process range is wide, place
Arsenic-containing waste residue increase-volume after reason is than little, non-secondary pollution.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and specification this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement is both fallen within scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (10)
1. a kind of technique of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue, comprises the following steps：
Step one：Make arsenic that oxidation reaction to occur to add oxidant in the arsenic-containing waste residue of 50%-70% and being stirred to water content；
Electric field is accommodated to arsenic-containing waste residue while addition oxidant, the negative electrode of the electric field is located at the middle part of arsenic-containing waste residue, and anode is located at
The surrounding of arsenic-containing waste residue is so that the anion in arsenic-containing waste residue is assembled to anode migration；
Step 2：Arsenic in arsenic-containing waste residue cancels electric field after oxidation reaction is finished, then adds stabilizer simultaneously in arsenic-containing waste residue
Stirring, makes the arsenic in arsenic-containing waste residue react and stabilizes arsenic, so as to obtain the compound of the arsenic of stable existence；
Wherein, in the step one and step 2, the percolate of arsenic-containing waste residue is collected by filtration all the time.
2. the technique of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue according to claim 1, it is characterised in that institute
The ratio of the addition volume and the volume of the arsenic-containing waste residue arsenic of stating oxidant is less than or equal to 1:10, the oxidant includes Gao Meng
One or more in sour potassium solution, hydrogen peroxide solution, the mass fraction of the oxidant is 10%-30%, the oxidant Jing
Peracid process, acid used by the acidification is one or more in sulfuric acid, nitric acid.
3. the technique of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue according to claim 1, it is characterised in that institute
The addition for stating stabilizer is 0.2-0.3 times of the arsenic-containing waste residue quality, and the stabilizer is the biological straw of load iron.
4. the technique of the electric field synergistic stabilization processes multivalent state arsenic-containing waste residue according to any one of claim 1-3, its
It is characterised by, the arsenic-containing waste residue is the arsenic-containing waste residue containing multivalent state arsenic.
5. the technique of the electric field synergistic stabilization processes multivalent state arsenic-containing waste residue according to any one of claim 1-3, its
It is characterised by, the stabilizer is made by the steps：
（1）It is 1 by molysite and biological straw mass ratio:5-1:7 backups；
（2）The molysite for having backed up is mixed with biological straw to carry out mechanical ball mill and sieves to obtain stabilizer.
6. the technique of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue according to claim 5, it is characterised in that institute
Molysite is stated for one or more in iron chloride, ferric sulfate, bodied ferric sulfate.
7. a kind of system of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue, it is characterised in that include：
Reacting tank body, is provided with waste residue charging aperture, oxidant feed mouth, stabilizer charging aperture, percolate on the reacting tank body
Outlet and waste residue outlet；
Agitating device, the agitating device includes being arranged on the paddle inside the reacting tank body；
Electric field generating means, the negative electrode of the electric field that the electric field generating means are produced is located at the reacting tank body center, the electricity
The anode of the electric field that field generating means are produced is located at the outside of reacting tank body；
Liquid collection bath, the liquid collection bath is connected to the percolate outlet.
8. the system of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue according to claim 7, it is characterised in that institute
The bottom for stating reacting tank body has the first diapire, the second diapire and the liquid storage being formed between first diapire and the second diapire
Space, is provided with filter opening on first diapire, the percolate outlet is connected with the liquid storage space.
9. the system of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue according to claim 8, it is characterised in that institute
State liquid storage space and be provided with flow-guiding structure, the middle part of the upper surface of the flow-guiding structure from the reacting tank body is towards described anti-
The side wall for answering tank body is gradually lowered, and the percolate outlet is arranged on the side wall of the reacting tank body.
10. the system of electric field synergistic stabilization processes multivalent state arsenic-containing waste residue according to claim 7, it is characterised in that
Positioned at the lower end center of the reacting tank body, the paddle of the paddle is configured to for the waste residue outlet：When the blade up time
When pin is rotated, the blade pushes material to the side wall of the reacting tank body, and when the blade is rotated counterclockwise, the blade will
Material to the central axis of the reacting tank body is pushed.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4948516A (en) * | 1989-08-21 | 1990-08-14 | Monsanto Company | Method of disposing of wastes containing heavy metal compounds |
| JPH11277075A (en) * | 1998-03-31 | 1999-10-12 | Dowa Mining Co Ltd | Method for removing/fixing arsenic existing in iron sulfate solution |
| US6254312B1 (en) * | 1998-06-18 | 2001-07-03 | Rmt, Inc. | Stabilization of arsenic-contaminated materials |
| CN101139150A (en) * | 2007-08-15 | 2008-03-12 | 哈尔滨工业大学 | Preoxidized-composite electrolyzing method for removing arsenic in groundwater |
| CN103406333A (en) * | 2013-08-14 | 2013-11-27 | 路域生态工程有限公司 | Safe disposal method for high-concentration arsenic residue |
| CN103551121A (en) * | 2013-11-15 | 2014-02-05 | 南京大学 | Adsorbing material prepared from waste straws and capable of adsorbing trivalent arsenic from water as well as preparation method and application thereof |
| CN103624071A (en) * | 2013-12-16 | 2014-03-12 | 华北电力大学 | System and method for repairing arsenic-polluted soil by virtue of cooperation of strong oxidation of semi-solid-phase Fenton and electro-dynamic power |
| CN104388094A (en) * | 2014-10-13 | 2015-03-04 | 广东省生态环境与土壤研究所（广东省土壤科学博物馆） | Iron-based bio-char material, preparation process thereof, and application thereof in soil pollution treatment |
| CN205413907U (en) * | 2015-09-18 | 2016-08-03 | 湖南启天环保科技有限公司 | Purifier of oils and heavy metal combined pollution cohesive soil earth |
-
2016
- 2016-12-25 CN CN201611211689.8A patent/CN106621167B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4948516A (en) * | 1989-08-21 | 1990-08-14 | Monsanto Company | Method of disposing of wastes containing heavy metal compounds |
| JPH11277075A (en) * | 1998-03-31 | 1999-10-12 | Dowa Mining Co Ltd | Method for removing/fixing arsenic existing in iron sulfate solution |
| US6254312B1 (en) * | 1998-06-18 | 2001-07-03 | Rmt, Inc. | Stabilization of arsenic-contaminated materials |
| CN101139150A (en) * | 2007-08-15 | 2008-03-12 | 哈尔滨工业大学 | Preoxidized-composite electrolyzing method for removing arsenic in groundwater |
| CN103406333A (en) * | 2013-08-14 | 2013-11-27 | 路域生态工程有限公司 | Safe disposal method for high-concentration arsenic residue |
| CN103551121A (en) * | 2013-11-15 | 2014-02-05 | 南京大学 | Adsorbing material prepared from waste straws and capable of adsorbing trivalent arsenic from water as well as preparation method and application thereof |
| CN103624071A (en) * | 2013-12-16 | 2014-03-12 | 华北电力大学 | System and method for repairing arsenic-polluted soil by virtue of cooperation of strong oxidation of semi-solid-phase Fenton and electro-dynamic power |
| CN104388094A (en) * | 2014-10-13 | 2015-03-04 | 广东省生态环境与土壤研究所（广东省土壤科学博物馆） | Iron-based bio-char material, preparation process thereof, and application thereof in soil pollution treatment |
| CN205413907U (en) * | 2015-09-18 | 2016-08-03 | 湖南启天环保科技有限公司 | Purifier of oils and heavy metal combined pollution cohesive soil earth |
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