CN107649483A - A kind of stable method for administering mercurous dangerous waste residue of low temperature thermal desorption amalgamation - Google Patents
A kind of stable method for administering mercurous dangerous waste residue of low temperature thermal desorption amalgamation Download PDFInfo
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- CN107649483A CN107649483A CN201710736348.0A CN201710736348A CN107649483A CN 107649483 A CN107649483 A CN 107649483A CN 201710736348 A CN201710736348 A CN 201710736348A CN 107649483 A CN107649483 A CN 107649483A
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- waste residue
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Abstract
The invention discloses a kind of stable method for administering mercurous dangerous waste residue of low temperature thermal desorption amalgamation, mercurous dangerous waste residue is first passed through the processing of low temperature thermal desorption and removes the lower boiling inorganic reference state mercury of organically combine state mercury and part in mercurous dangerous waste residue by this method, then add vulcanization salting liquid and carry out vulcanization reaction, add ferrous salt and precipitate excessive S2‑, add clay mineral and humus adsorbed, add pH adjusting agent and adjust mercurous dangerous waste residue pH to 6~7, conserve more than 3 days.This method can realize the removal of low boiling form mercury in mercurous dangerous waste residue, the stabilisation of higher boiling form mercury, substantially reduce the migration of mercury in mercurous dangerous waste residue, this method can carry out effectively removing and stabilizing solidifying to variform mercury in waste slag containing mercury, and stabilization effect is good, energy consumption is low, the cycle is short, this method use medicament stock source is wide, cost is low, be advantageous to extensive use.
Description
Technical field
It is more particularly to a kind of stable by low temperature thermal desorption amalgamation the present invention relates to mercurous dangerous controlling waste residue method
The method for administering mercurous dangerous waste residue, belongs to solid waste treatment technical field.
Background technology
In recent years, developing rapidly with industrial or agricultural, mercury are largely discharged in the production and use process,《National waste
Register》Mercurous waste is classified as HW29 class wastes.Mercurous dangerous waste residue is primarily referred to as mercury ore exploitation smelting, chlorine industry, electricity
The mercurous solid waste caused by industry such as pond and the thermometer manufacturing.These mercurous waste mercury contents are high, if improper conduct oneself well
Put, it will pollution air, Soil Surrounding, surface water and underground water, the mercury and mercuric compounds in soil can be entered by food chain
Human body, greatly harm is produced to human body.Therefore, suitable method is selected to carry out the safe disposal of mercurous dangerous waste residue, to me
State's environmental improvement, protection health are significant.
Mercury can be divided into by chemical form：Mercury metal, inorganic reference state mercury, organically combine state mercury.The mercury of inorganic states mainly with
The Hg of free state2+And Hg+Form is present, wherein, Hg+It can form slightly solubility mercury salt, and Hg2+It is mostly soluble mercury salt.It is organic
The mercury of chemical combination states of matter based on short-chain alkyl mercury, mercury with other small molecules or large biological molecule covalently to coordinate, with part with
It is reference state that position or supermolecule form, which combine formed state, and organomercurial compound is more sensitive to light and heat, has higher
Volatility.
At present, mercuric pollution treatment technology mainly has heat treating process, curing/stabilizing method, elution method, electro reclamation, life
Thing repairing method etc..These methods have respective advantage and disadvantage, most study application at present it is most be still curing/stabilizing method with
Heat treating process.
Curing/stabilizing method is come the technical combinations of pollutant in immobilized waste by physics and chemical action.Stabilize
It can occur chemically or physically to react with the heavy metal contaminants in waste residue with solidified reagents, be allowed to be converted into and not readily dissolve, migrate
The form that ability is weak, toxicity is smaller.At present, it is less specifically for the relevant report of mercurous dangerous waste residue stabilization processes, but pin
The technique study of stabilization agent and reparation to mercury contaminated soil is more, as Chinese patent (CN105414166A) discloses one
The restorative procedure of kind mercury contaminated soil, specifically the liftoff topsoil plough of mercury contaminated soil is turned over, air-dries, grind, sieve, obtain
To pretreated topsoil；The passivator that will be made up of bentonite, hydroxyapatite, ATS (Ammonium thiosulphate) and calcium hydroxide,
Fully mixed with treated topsoil, place 10-20 days until mercury content 70% is fixed in topsoil, be passivated
Agent reparation is completed；Topsoil is flattened and plants upper India cabbage mustard, cabbage mustard growth animated period is molten by calcium thiosulfate in India
It is simultaneously uniformly sprayed onto in India's cabbage mustard root system surrounding soil by Yu Shuizhong, finally gathers in India cabbage mustard.Chinese patent (CN
105598145 A) a kind of in-situ remediation method of mercury contaminated soil is disclosed, this method selects charcoal, calcium polysulfide and Asia
Three kinds of passivator of sodium selenate, it can be effectively improved Soil Micro-environment after being applied to using charcoal mixing in soil, in meta-alkali and
In the stronger soil of reproducibility, the migration of mercury substantially reduces, with powerful than surface and loose structure, complicated organic official
Mercury in a large amount of sticking soil of charcoal and can that can be rolled into a ball；Calcium polysulfide solution is poured in soil can further promote the ore deposit of mercury
Change, its root soil microenvironment bioactivity is strengthened after Planting Crops, and selection applies sodium selenite solution, utilizes selenium and mercury
Antagonistic effect weakens its biological effectiveness.After adding three kinds of passivation processing, mercury content in crops is significantly reduced.In
State's patent (A of CN 104998894) discloses a kind of mercury contaminated soil solidification and stabilization method, including villaumite addition process, pH
Adjust process, mixed processes, addition activator process, digestion molding procedure and break process process.This method can be to difference
The mercury contaminated soil of pollution level carries out solidification and stabilization, can also cooperate with other huge sum of moneys in solidification and stabilization contaminated soil
Category.Product after solidification and stabilization can backfill or for other purposes.Although these methods of existing report are to a certain degree
On can realize the static stabilization of mercury in mercury contaminated soil, but the long processing period of these methods, and being difficult in adapt to a variety of
The stabilisation of form mercury, stabilization effect are poor.
Heat treating process is by direct or indirect heat exchange, and the mercury in soil is heated to enough temperature, makes mercury with gas
The process that the form of state is volatilized or separated from soil.Heat treating process demercuration is the method that can effectively remove mercury in soils, root
According to the existence of mercury in soils and the content of mercury, high temperature thermal desorption (600 DEG C~1000 DEG C) and low temperature thermal desorption can be used
Two kinds of (200 DEG C~600 DEG C).Mercury has a variety of forms in soil, including：Hg、HgCl2、Hg2Cl2, HgO, HgS and with soil
The mercury of the inorganic combination of earth, organically combine state mercury etc., Hg, HgCl2、Hg2Cl2Mercury boiling point etc. form is relatively low, can use Low Temperature Thermal
Desorption method is handled and is easier to remove, and the mercury boiling point of the form such as HgO, HgS is very high, it is necessary to is heated to 700~800
The temperature of DEG C even more high, and heat treatment time could be removed effectively commonly greater than 1 hour, therefore, needed for high temperature rehabilitating soil
Energy consumption is higher, and particularly numerous studies show, heat treatment temperature is higher than 350 DEG C, and the structure of soil is destroyed seriously.At present, pin
Research to mercury contaminated soil thermal desorption reparation is very more, but most of be high temperature thermal desorption method, low temperature thermal desorption study compared with
Few, Chinese patent (CN103056157A) discloses a kind of low temperature pyrogenation processing method and device of mercury contaminated soil.Should
Patent is by mercury contaminated soil input pyrolysis installation of the moisture content less than 10%, and the initial temperature of pyrolysis installation is 250 DEG C, 30
400 DEG C are heated in minute, mercury in soils content is still higher after this method is repaired, and is far above《Soil environment quality mark
It is accurate》(GB15618-1995) grade III Standard, repairing effect are undesirable.Chinese patent (CN103785682A) discloses a kind of utilization
Organic acid promote mercury contaminated soil heat treatment repair method, this method first organic acid is well mixed with mercury contaminated soil after again
Put into pyrolysis installation, 400~500 DEG C of pyrolysis temperature, 20~60 minutes processing times, after this method is repaired in soil are set
Mercury content can be less than《Standard of soil environment quality》(GB15618-1995) grade III Standard, although this method is by adding organic acid
Etc. can suitably reduce pyrolysis temperature, the removal efficiency of mercury is improved, but this method pyrolysis temperature is still more than 400 DEG C.
Due to the enrichment slag that mercurous dangerous waste residue is mercury, mercury content is significantly larger than in general mercury contaminated soil, existing place
The method of reason mercury contaminated soil is difficult in adapt in the processing of mercurous dangerous waste residue, also and is had no in the prior art using low temperature pyrogenation
Technology and medicament stabilization technique are combined the relevant report of mercury in efficient stable waste residue.The present invention is steady with medicament by low temperature pyrogenation
Surely want to combine the mercury in the mercurous dangerous waste residue of efficient stable, substantially reduce its Leaching, make its satisfaction《Hazard waste landfill is dirty
Contaminate control standard》(GB18598-2001) the concentration limitation of landfill yard is allowed access into.
The content of the invention
The defects of existing for the methods of stabilization processes of mercurous dangerous waste residue in the prior art, the purpose of the present invention is
Be to provide it is a kind of pyrolysis technique and stabilization technology are combined, to realize having for variform mercury in mercurous dangerous waste residue
Effect removing and efficient stable, and the method for low, the lower-cost mercurous dangerous waste residue of improvement of energy consumption.
In order to realize the purpose of the present invention, the invention provides a kind of stable mercurous danger of improvement of low temperature thermal desorption amalgamation
The method of dangerous waste residue, this method comprise the following steps：
1) mercurous dangerous waste residue is air-dried, is broken into fine grained；
2) fine grained is heat-treated at a temperature of being placed in 200~400 DEG C；
3) vulcanization salting liquid is added in heat treated fine grained and carries out vulcanization reaction；
4) add ferrous salt and precipitate excessive S2-；
5) add clay mineral and humus is adsorbed；
6) pH adjusting agent regulation waste residue pH to 6~7 is eventually adding, is conserved more than 3 days.
Preferable scheme, the mercurous dangerous waste residue, which is air-dried to moisture content, is less than 10%, is crushed to particle diameter and is less than 3cm.Will
Mercurous dangerous waste residue is dry and is crushed to the rate of volatilization that appropriate granularity is advantageous to improve mercury.
Preferable scheme, the time of the heat treatment is 20~60 minutes；Preferred heat treatment time is 25~
35min.Technical solution of the present invention handles the short period at low temperature, can reduce energy consumption.
Preferable scheme, the sulphurizing salt are measured with more than 1 times of mercury mole in mercurous dangerous waste residue.Preferable vulcanization
Salt includes at least one of vulcanized sodium, ammonium sulfide, potassium sulfide, more preferably vulcanized sodium.
Preferable scheme, ferrous salt is with 0.5%~2% metering of mercurous dangerous slag quality.Preferable ferrous salt includes
At least one of ferrous sulfate, frerrous chloride, ferrous nitrate, more preferably ferrous nitrate.
Preferable scheme, clay mineral and humus are with 2%~10% metering of mercurous dangerous slag quality.It is preferable viscous
Native mineral substance includes at least one of bentonite, zeolite, sepiolite, illite, montmorillonite, concave convex rod, more preferably illite
And/or montmorillonite.The mass ratio of more preferably scheme, clay mineral and humus is 1~3:1.
Preferable scheme, pH adjusting agent are measured with adjusting the pH of mercurous dangerous waste residue 6~7.Preferable pH adjusting agent bag
Include at least one of calcium oxide, calcium hydroxide, calcium carbonate.
Preferable scheme, heat treatment temperature is more preferably 350~400 DEG C in step 2).
Preferable scheme, in step 6), curing time is 3~7 days.
Mercurous dangerous waste residue is pre-processed using low temperature thermal decomposition method first in technical scheme,
Mercurous dangerous waste residue is heat-treated at a temperature of 200~400 DEG C, the big portion in the mercurous dangerous waste residue that can quickly, effectively volatilize
Divide volatile mercury, such as HgCl2、Hg2Cl2And the realization such as organic mercury volatilization, while can also be by the mercurous compound of hardly possible volatilization
Bivalent mercury is oxidized to, and bivalent mercury is easier to respect to monovalence mercury and S2-Form stable HgS.
The sulphurizing salt of the present invention is as the reagent for stablizing mercury, in order to ensure the Hg in reaction system2+It is heavy to generate completely
Form sediment, the addition of sulphurizing salt is at least 1 with respect to the mole ratio of mercury element in waste residue:1.
The ferrous salt of the present invention mainly has three effects, and first, can be by excessive S present in reaction system2-Form precipitation,
With prevent mercuric sulphide from returning molten, second, Fe2+Oxidation generation ferric hydrous oxide colloid, recycles its absorption and co-precipitation to enter
The one step removal of mercury, the 3rd, excessive Fe2+Presence waste residue environment is under reducing condition, so be more conducive to mercuric sulphide generation.
The clay mineral and humus of the present invention has the function that synergistic sorption Trace Mercury.
The pH adjusting agent of the present invention to control waste residue pH 6~7, be advantageous under conditions of being 6~7 in pH whole
System and mercuric sulphide are stabilized.
Due to generally, mercury metal, monovalence mercury and organically combine state mercury it is more difficult by chemical agent and stabilized,
Technical scheme removes the mercury of low boiling form in mercurous dangerous waste residue using the processing of low temperature thermal desorption first, simultaneously will
The mercurous compound of hardly possible volatilization is oxidized to bivalent mercury, then stablizes remaining mercury by chemical agent, greatly improves stable effect
Rate.In stabilization process, sulphurizing salt and Hg are utilized2+Reaction, stable mercuric sulphide precipitation is generated, but one in actual process
As need to add excessive S2-, to ensure mercury whole immobilization, but cause HgS further to generate one compared with conference if sulphur is excessive
The soluble HgS of kind2-, dissolve again.And excessive S can be made by adding ferrous salt2-Formation FeS precipitations, while Fe2+Can also
Oxidation generation ferric hydrous oxide, ferric hydrous oxide can pass through adsorption and the co-precipitation removal of mercury；In addition, Fe2+'s
In the presence of making waste residue environment be under reducing condition, the generation of mercuric sulphide is so more conducive to, and is very stably present in for a long time useless
In slag.But excessive Fe2+It can trigger the problem of new, hydrolysis easily occurs and discharges H+Ion, make waste residue souring：4Fe2++O2+
6H2O→4FeOOH+8H+, waste residue pH is adjusted by adding alkaline matter, makes waste residue pH finally stable between 6~7, this is mercury
The best pH of stablizing effect.In addition, clay pit species and humus add can synergistic sorption residual mercury, further consolidate steady
Surely effect is changed.
The stabilizer of the present invention includes the materials such as sulphurizing salt, ferrous salt, clay pit species and humus, is solid particle
Shape is powdered, first adds sulphurizing salt during use, stirs and add ferrous salt after reacting a period of time, be eventually adding viscous
The sorbing materials such as native mineral substance, humus, make sure to keep in mind after can not mixing to add together, otherwise sulphurizing salt can react with ferrous salt
And reduce active ingredient and cause stablizing effect to decline.
The pH conditioners of the present invention are the alkaline matters such as calcium oxide, calcium hydroxide, calcium carbonate, are solid powdery.
The method of the mercurous dangerous controlling waste residue of the present invention, specifically includes step in detail below：
(1) the mercurous dangerous waste residue of mercury air-dried to moisture content less than 10%, be crushed to particle diameter and be less than 3cm, removed larger
The debris such as stone；
(2) in the waste particle input Equipment for Heating Processing after air-drying, crush, 200~400 DEG C for the treatment of temperature, place are set
20~60 minutes time is managed, is heated；
(3) the mercurous dangerous waste residue after being heat-treated is come out by discharging opening, and the mercury in tail gas is condensed into recovery, then through activated carbon
The mercury of Adsorption residual；
(4) the mercurous dangerous waste residue after being heat-treated adds sulphurizing salt after being cooled to normal temperature, and sulphurizing salt can be with the shape of solid
Formula add, can also wiring solution-forming add, stir, make the Hg in mercurous dangerous waste residue2+It is fully converted to HgS precipitations；
(7) ferrous salt is added, stirs, makes excessive S2-Form FeS precipitations, while unnecessary Fe2+Oxidation generation water
Ferriferous oxide is closed, then by ferriferous oxide adsorption and the further removal of mercury of co-precipitation, and Fe2+Presence make waste residue ring
Border is under reducing condition, is so more conducive to the generation of mercuric sulphide, and highly stable permanent is present in waste residue；
(8) clay pit species and humus are added, stirs, further consolidates stabilization effect；
(9) add alkaline matter to stir, the pH of waste residue is adjusted to 6~7, if the pH of waste residue is after above-mentioned steps
Through in 6~7 scopes, then this step can be exempted from, finally conserve 3~7 days.
Compared with the prior art, the advantageous effects that technical scheme is brought：
1) administering method of the invention can realize the efficient removal and stabilisation of various form mercury in mercurous dangerous waste residue.
2) present invention administers mercurous dangerous waste residue using the stable method of low temperature thermal desorption amalgamation, in heat treatment bar
Most of low boiling mercury in mercurous dangerous waste residue can be removed under part, the consumption of follow-up stabilization process Chinese medicine is reduced, improves
Stabilization efficiency, the shortcomings that high general thermal desorption method temperature, high energy consumption can also be avoided.Therefore, low temperature thermal desorption of the invention
Combining chemically stable method can not only make the mercury of various forms in mercurous dangerous waste residue obtain fast eliminating and stabilization processes,
Stabilization efficiency is greatly improved, and energy consumption can be reduced, reduces medicament use cost.
3) stable pharmaceutical raw material sources of the invention are wide, cost is low, is advantageous to promote the use of.
4) method of mercurous dangerous controlling waste residue of the invention can realize mercurous dangerous waste residue by simple operations step
The fast eliminating of middle variform mercury and efficiently fixation, general maintenance 3 days, can reach preferable stablizing effect, press《Solid gives up
Thing Leaching leaching method horizontal vibration method》(HJ557-2009) leached, the concentration of mercury is less than in its leachate
0.25mg/L, meet《Hazard waste landfill contamination control standard》(GB18598-2001) the concentration limit of landfill yard is allowed access into
System.
5) stabilizer of the invention is fixed to the mercury in mercurous dangerous waste residue by chemical stabilization, independent of microorganism
Activity, so as to which heavy metal toxicity, waste residue property are insensitive, applicability is wide.
Embodiment
Following examples are intended to further illustrate present invention, rather than the protection model of limitation the claims in the present invention
Enclose.
Embodiment 1
Tongren district Guizhou Province mercury ore is taken to smelt the waste residue left, mercury content is up to 1150mg/kg in waste residue, according to《Solid gives up
Thing Leaching leaching method sulfonitric method》(HJ/T299-2007) taken slag specimen is leached, mercury in its leachate
Concentration is 3.25mg/L, is exceeded《Hazardous waste judging standard leaching characteristic identification》(GB5085.3-2007) the concentration limit of mercury in
Value 0.1mg/L, this waste slag containing mercury are hazardous waste.According to《Solid waste Leaching leaching method horizontal vibration method》
(HJ557-2009) taken slag specimen is leached, the concentration of mercury is 1.68mg/L in its leachate, is exceeded《Hazard waste landfill
Contamination control standard》(GB18598-2001) the concentration limit 0.25mg/L of landfill yard is allowed access into, need to carry out stabilizing admittedly
Change processing reaches admissions criteria.
(1) mercurous dangerous waste residue air-dried to moisture content less than 10%, be crushed to particle diameter and be less than 3cm；
(2) weigh and heated in pretreated waste residue 500g inputs annealing device, treatment temperature 350 is set
DEG C, 30 minutes processing times.Waste residue after heat treatment is come out by discharging opening, and the mercury in tail gas is condensed into recovery, then through activated carbon
The mercury of Adsorption residual, the content of tail gas mercury after processing meet《Discharge standard of air pollutants》(GB16297-
1996) prescribed limits in.
(3) waste residue after being heat-treated is cooled to the sodium sulfide solution of addition 5% after normal temperature, and the addition of vulcanized sodium is sulphur member
The mole ratio of element and mercury element in waste residue is 1:1, stir, react 30min, make the Hg in waste residue2+It is fully converted to HgS
Precipitation；
(4) ferrous nitrate is added, addition is the 1% of slag quality, is stirred, and reacts 15min；
(5) illite, montmorillonite and humus are added, the mass ratio between three is 1:1:1, total addition is waste residue matter
The 5% of amount, stirs；
(6) add calcium hydroxide to stir, the pH of waste residue is adjusted to 6-7, if the pH of waste residue is after above-mentioned steps
Through in 6-7 scopes, then this step can be exempted from；
(7) conserve 3 days after according to《Solid waste Leaching leaching method horizontal vibration method》(HJ557-2009) carry out
Leach, the concentration of mercury is 0.06mg/L in its leachate, is met《Hazard waste landfill contamination control standard》(GB18598-
2001) the concentration limitation 0.25mg/L of landfill yard is allowed access into.
Comparative example 1
Waste residue same as Example 1 is taken, and is air-dried through identical, break process, is handled without thermal desorption, next
Stabilization step it is same as Example 1, maintenance 3 days after according to《Solid waste Leaching leaching method horizontal vibration method》
(HJ557-2009) being leached, the concentration of mercury is 0.58mg/L in its leachate, far above the value in embodiment 1, and can not
Meet《Hazard waste landfill contamination control standard》(GB18598-2001) the concentration limitation 0.25mg/ of landfill yard is allowed access into
L。
Comparative example 2
Waste residue same as Example 1 is taken, and is air-dried through identical, break process.Weigh pretreated waste residue 500g
Heat treatment same as Example 1 is carried out in annealing device, waste residue after heat treatment is cooled to after normal temperature while added
Sodium sulfide solution, ferrous nitrate, illite, montmorillonite and humus, addition is same as Example 1, is stirring evenly and then adding into
Calcium hydroxide adjust pH to 6-7, maintenance 3 days after according to《Solid waste Leaching leaching method horizontal vibration method》(HJ557-
2009) leached, the concentration of mercury is 0.49mg/L in its leachate, far above the value in embodiment 1, and can not be met《Danger
Dangerous waste reclamation contamination control standard》(GB18598-2001) the concentration limitation 0.25mg/L of landfill yard is allowed access into.
Embodiment 2
Waste residue same as Example 1 is taken, and is air-dried through identical, break process.Weigh pretreated waste residue 500g
Put into annealing device, setting treatment temperature to be 350 DEG C, processing time is respectively the condition of 20,30,40,50,60 minutes
Under heated.Waste residue after heat treatment carries out stabilization processes same as Example 1, maintenance 3 after being cooled to normal temperature
After it according to《Solid waste Leaching leaching method horizontal vibration method》(HJ557-2009) leached, mercury in its leachate
Concentration be respectively 0.17mg/L, 0.06mg/L, 0.01mg/L, 0.006mg/L, ND, can meet《Hazard waste landfill pollutes
Control standard》(GB18598-2001) the concentration limitation 0.25mg/L of landfill yard is allowed access into.
Embodiment 3
Waste residue same as Example 1 is taken, and is air-dried through identical, break process.Weigh pretreated waste residue 500g
Put into annealing device, setting processing time to be 30 minutes, treatment temperature is respectively 200,250,300,350,400 DEG C
Under the conditions of heated.Waste residue after heat treatment carries out stabilization processes same as Example 1 after being cooled to normal temperature, supports
Shield 3 days after according to《Solid waste Leaching leaching method horizontal vibration method》(HJ557-2009) leached, its leachate
The concentration of middle mercury is 0.23mg/L, 0.18mg/L, 0.11mg/L, 0.06mg/L, ND, can be met《Hazard waste landfill pollutes
Control standard》(GB18598-2001) the concentration limitation 0.25mg/L of landfill yard is allowed access into.
Embodiment 4
Waste residue same as Example 1 is taken, and is air-dried through identical, break process.Weigh pretreated waste residue 500g
Heat treatment same as Example 1 is carried out in annealing device, waste residue after heat treatment adds 5% after being cooled to normal temperature
Potassium sulfide solution, the addition of potassium sulfide are that the mole ratio of element sulphur and mercury element in waste residue is 1:1, stir, react
30min, frerrous chloride is added, addition is the 1% of slag quality, is stirred, and reacts 15min；Add bentonite, zeolite and
Humus, the mass ratio between three are 1:1:1, total addition is the 5% of slag quality, is stirred；Next adjust pH's
Step is same as Example 1, maintenance 3 days after according to《Solid waste Leaching leaching method horizontal vibration method》(HJ557-
2009) leached, the concentration of mercury is 0.12mg/L in its leachate, higher than the value in embodiment 1, but can be met《Danger is useless
Thing fills contamination control standard》(GB18598-2001) the concentration limitation 0.25mg/L of landfill yard is allowed access into.
Claims (8)
1. a kind of stable method for administering mercurous dangerous waste residue of low temperature thermal desorption amalgamation, it is characterised in that：Including following step
Suddenly：
1) mercurous dangerous waste residue is air-dried, is broken into fine grained；
2) fine grained is heat-treated at a temperature of being placed in 200~400 DEG C；
3) vulcanization salting liquid is added in heat treated fine grained and carries out vulcanization reaction；
4) add ferrous salt and precipitate excessive S2-；
5) add clay mineral and humus is adsorbed；
6) pH adjusting agent regulation waste residue pH to 6~7 is eventually adding, is conserved more than 3 days.
2. a kind of stable method for administering mercurous dangerous waste residue of low temperature thermal desorption amalgamation according to claim 1, its
It is characterised by：The mercurous dangerous waste residue, which is air-dried to moisture content, is less than 10%, is crushed to particle diameter and is less than 3cm.
3. a kind of stable method for administering mercurous dangerous waste residue of low temperature thermal desorption amalgamation according to claim 1, its
It is characterised by：The time of the heat treatment is 20~40 minutes.
A kind of 4. stable side for administering mercurous dangerous waste residue of low temperature thermal desorption amalgamation according to claim 1,2 or 3
Method, it is characterised in that：The sulphurizing salt is measured with more than 1 times of mercury mole in mercurous dangerous waste residue；The sulphurizing salt includes
At least one of vulcanized sodium, ammonium sulfide, potassium sulfide.
A kind of 5. stable side for administering mercurous dangerous waste residue of low temperature thermal desorption amalgamation according to claim 1,2 or 3
Method, it is characterised in that：The ferrous salt is with 0.5%~2% metering of mercurous dangerous slag quality；The ferrous salt includes sulfuric acid
At least one of ferrous iron, frerrous chloride, ferrous nitrate.
A kind of 6. stable side for administering mercurous dangerous waste residue of low temperature thermal desorption amalgamation according to claim 1,2 or 3
Method, it is characterised in that：The clay mineral and humus are with 2%~10% metering of mercurous dangerous slag quality；The clay
Mineral include at least one of bentonite, zeolite, sepiolite, illite, montmorillonite, concave convex rod.
A kind of 7. stable side for administering mercurous dangerous waste residue of low temperature thermal desorption amalgamation according to claim 1,2 or 3
Method, it is characterised in that：The pH adjusting agent is measured with adjusting the pH of mercurous dangerous waste residue 6~7；The pH adjusting agent includes oxygen
Change at least one of calcium, calcium hydroxide, calcium carbonate.
A kind of 8. stable side for administering mercurous dangerous waste residue of low temperature thermal desorption amalgamation according to claim 1,2 or 3
Method, it is characterised in that：Curing time is 3~7 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710736348.0A CN107649483B (en) | 2017-08-24 | 2017-08-24 | A kind of method that low temperature thermal desorption amalgamation stablizes the mercurous dangerous waste residue of improvement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710736348.0A CN107649483B (en) | 2017-08-24 | 2017-08-24 | A kind of method that low temperature thermal desorption amalgamation stablizes the mercurous dangerous waste residue of improvement |
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| Publication Number | Publication Date |
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| CN107649483A true CN107649483A (en) | 2018-02-02 |
| CN107649483B CN107649483B (en) | 2019-11-29 |
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| CN201710736348.0A Active CN107649483B (en) | 2017-08-24 | 2017-08-24 | A kind of method that low temperature thermal desorption amalgamation stablizes the mercurous dangerous waste residue of improvement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811147A (en) * | 2019-03-22 | 2019-05-28 | 中科京投环境科技江苏有限公司 | A kind of mercury recyclable device of waste slag containing mercury |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5803663A (en) * | 1995-07-18 | 1998-09-08 | Taisei Corporation | Mercury-removal method |
| CN103056157A (en) * | 2013-01-25 | 2013-04-24 | 贵州省环境科学研究设计院 | Repairing method and device for mercury-polluted soil by using low-temperature pyrolysis treatment |
| CN103785682A (en) * | 2014-03-05 | 2014-05-14 | 中国环境科学研究院 | Method of promoting heat treating remediation for soil polluted by mercury |
| CN104174635A (en) * | 2014-09-03 | 2014-12-03 | 广西博世科环保科技股份有限公司 | Method and equipment for processing mercury-containing waste residue |
| CN104986926A (en) * | 2015-06-15 | 2015-10-21 | 南京河海科技有限公司 | Formula for heavy metal pollution sludge stabilization processing material |
| CN106281332A (en) * | 2016-07-27 | 2017-01-04 | 武汉都市环保工程技术股份有限公司 | Mercury contaminated soil reparation passivator and mercury contaminated soil restorative procedure and application |
| CN106398702A (en) * | 2016-06-07 | 2017-02-15 | 环境保护部环境规划院 | High-efficiency reductive restoration reagent and restoration process for heavy metal-contaminated soil |
-
2017
- 2017-08-24 CN CN201710736348.0A patent/CN107649483B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5803663A (en) * | 1995-07-18 | 1998-09-08 | Taisei Corporation | Mercury-removal method |
| CN103056157A (en) * | 2013-01-25 | 2013-04-24 | 贵州省环境科学研究设计院 | Repairing method and device for mercury-polluted soil by using low-temperature pyrolysis treatment |
| CN103785682A (en) * | 2014-03-05 | 2014-05-14 | 中国环境科学研究院 | Method of promoting heat treating remediation for soil polluted by mercury |
| CN104174635A (en) * | 2014-09-03 | 2014-12-03 | 广西博世科环保科技股份有限公司 | Method and equipment for processing mercury-containing waste residue |
| CN104986926A (en) * | 2015-06-15 | 2015-10-21 | 南京河海科技有限公司 | Formula for heavy metal pollution sludge stabilization processing material |
| CN106398702A (en) * | 2016-06-07 | 2017-02-15 | 环境保护部环境规划院 | High-efficiency reductive restoration reagent and restoration process for heavy metal-contaminated soil |
| CN106281332A (en) * | 2016-07-27 | 2017-01-04 | 武汉都市环保工程技术股份有限公司 | Mercury contaminated soil reparation passivator and mercury contaminated soil restorative procedure and application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811147A (en) * | 2019-03-22 | 2019-05-28 | 中科京投环境科技江苏有限公司 | A kind of mercury recyclable device of waste slag containing mercury |
| CN109811147B (en) * | 2019-03-22 | 2023-09-05 | 中科京投环境科技江苏有限公司 | Mercury recovery device of mercury-containing waste residue |
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