CN110479734A - A kind of method and device thereof using alkaline melt harmless treatment industrial waste salt - Google Patents
A kind of method and device thereof using alkaline melt harmless treatment industrial waste salt Download PDFInfo
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- CN110479734A CN110479734A CN201910701051.XA CN201910701051A CN110479734A CN 110479734 A CN110479734 A CN 110479734A CN 201910701051 A CN201910701051 A CN 201910701051A CN 110479734 A CN110479734 A CN 110479734A
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- Prior art keywords
- industrial waste
- alkaline
- waste salt
- salt
- harmless treatment
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- 150000003839 salts Chemical class 0.000 title claims abstract description 104
- 239000002440 industrial waste Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 31
- 230000001590 oxidative effect Effects 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 48
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 8
- 239000011707 mineral Substances 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 239000012159 carrier gas Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 6
- 239000003570 air Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 4
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 239000008246 gaseous mixture Substances 0.000 claims description 3
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000005416 organic matter Substances 0.000 abstract description 9
- 238000002425 crystallisation Methods 0.000 abstract description 5
- 230000008025 crystallization Effects 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 3
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 abstract description 2
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 230000001473 noxious effect Effects 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract description 2
- 238000004090 dissolution Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000005201 scrubbing Methods 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 229940052308 general anesthetics halogenated hydrocarbons Drugs 0.000 description 2
- 150000008282 halocarbons Chemical group 0.000 description 2
- 239000002920 hazardous waste Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- -1 landfill Chemical class 0.000 description 1
- PALNZFJYSCMLBK-UHFFFAOYSA-K magnesium;potassium;trichloride;hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-].[Cl-].[K+] PALNZFJYSCMLBK-UHFFFAOYSA-K 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/005—Fusing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of method and device thereof using alkaline melt harmless treatment industrial waste salt, this method is complicated for the organic matter contained in industrial waste salt, it is difficult to the characteristics of removing, using frit reaction furnace apparatus, alkaline, inorganic salts are heated and are melted, are passed through industrial waste salt and oxidizing gas, the organic matter in industrial waste salt can decompose and gasify in reacting furnace, residue is high purity salt product, and the industrial product salt without organic matter is obtained after dissolution, washing, multiple evaporative crystallization.Compared with prior art, raw material of the present invention is easy to get, easy to operate, does not generate the secondary pollutions such as noxious acidic gaseous and dioxin；The resource utilization for realizing the harmless treatment and salt component to the industrial waste salt containing organic matter utilizes, and cost of investment is low, widely applicable, has compared with high-environmental and and economic benefit.
Description
Technical field
The invention belongs to hazardous waste processing and recycling field, utilize the innoxious place of alkaline melt more particularly, to a kind of
Manage the method and device thereof of industrial waste salt.
Background technique
Abraum salt is the by-product crystallization salt generated in industrial production, prepares and refines from industrial chemistry, chemical products
Production and high-salt wastewater processing.In China there are many industry of abraum salt generation is related to, such as pesticide synthesis industry, chlorine industry, coal
Chemical industry and environmental protection industry (epi).Its abraum salt type generated includes single abraum salt, mixed salt and carnallite (impure), due to technique mistake
Journey is complicated, and usually association is organic for the abraum salt of generation, inorganic impurity, belongs to hazardous waste.
The end treatment technology of abraum salt mainly landfill, burning and harmlessness disposing.Landfill is by abraum salt by concrete
After solidification, landfill stabilization is carried out according to Landfill specification.Due to the highly-water-soluble of abraum salt, easily to leachate quality and underground
Water system has an impact, and generally can only enter rigid landfill yard.Burning is that abraum salt is heated to 900 DEG C, and inorganic salts melting flows into
Furnace bottom recycles after cooling, and organic matter volatilizees and decomposes at high temperature, and flue gas enters dual firing chamber and further burns or through physico
It is discharged after processing.Since the fluctuation of abraum salt fusing point section is big, slagging, ring formation, agglomeration etc. easily occur during burning disposal
Unfavorable phenomenon causes equipment to corrode and block, and technology stability is poor.
In this context, the harmlessness disposing of abraum salt becomes the inevitable outlet of abraum salt.In order to remove having in industrial waste salt
Machine object realizes that the recycling of abraum salt recycles, and nearly 2 years, Chinese patent CN107803395A and CN106914474A disclosed work
Industry abraum salt decomposes the Processes and apparatus of carbonization harmless treatment, proposes heat-treating industry abraum salt removal organic matter and realizes pollutant
Largely removed method has reliable development prospect.But the organic matter removal of Low Temperature Heat Treatment is inefficient, generates a large amount of
Toxic tail gas.
Summary of the invention
Alkaline melt is utilized it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of
The method and device thereof of harmless treatment industrial waste salt.
The purpose of the present invention can be achieved through the following technical solutions:
The present invention provides a kind of method using alkaline melt harmless treatment industrial waste salt, comprising the following steps:
(1) alkaline, inorganic salts are heated, melts salt body, is passed through oxidizing gas, is pre-processed；
(2) industrial waste salt is continuously passed through in basic mineral molten salt bath under the action of oxidizing gas carrier gas, is carried out anti-
It answers, the gas of generation discharges after treatment；
(3) after basic mineral molten salt bath exhausts, the slag of generation is taken out, high-purity is recycled after dissolving, recrystallizing
Product salt.
Preferably, the alkaline, inorganic salts are NaOH, LiOH, KOH, Mg (OH)2、Ba(OH)2、Na2CO3、K2CO3With
Li2CO3At least one of.
Preferably, the temperature heated in step (1) is higher than 100 DEG C of alkaline, inorganic salts fusing point or more.
It is further preferred that the temperature heated in step (1) is 300-800 DEG C.
Preferably, the gaseous mixture or carbon dioxide of the oxidizing gas oxygen, air, nitrogen and oxygen.
Preferably, the pretreated time is 10~20min in step (1)；In step (2) reaction time be 2~
10min。
Preferably, the gas main component generated in step (2) includes CO2, CO, O2And N2At least one of.
Preferably, in step (2), industrial waste salt is continuously passed through alkaline, inorganic salts under the action of oxidizing gas carrier gas
The bottom of melt.
The present invention also provides a kind of device using alkaline melt harmless treatment industrial waste salt, for the method,
Including frit reaction furnace and the feeding mechanism being connected on frit reaction furnace, admission gear, exhaust port and reaction fire grate
Outlet；The frit reaction furnace is used as reaction vessel, and the feeding mechanism is used for the feed of industrial waste salt, the air inlet
Mechanism is passed through for oxidizing gas, and the exhaust port is connected with tail gas treating unit, the reacting furnace discharge
Mouth is used for the taking-up of slag.
Preferably, the tail gas treating unit includes alkaline absorption solution and organic solvent absorbing liquid, and is equipped with multicomponent
On-Line Monitor Device of Gas.
Preferably, which is additionally provided with alkaline, inorganic salts supply port, in the reaction by monitoring exhaust gas composition and melting
What the comprehensive method of slag composition judged the inorganic molten salt bath of frit reaction furnace neutral and alkali exhausts situation, basic mineral is replenished in time
Salt.
Preferably, corrosion-resistant stainless steel or other alloy materials can be used in frit reaction furnace body, and reacting furnace is outer to be added with electricity
The mode of hot, straight fire heating or heat radiation heating is heated.
Preferably, by corrosion-resistant piping connection between each equipment of the device, pipeline is equipped with pressure, temperature and flow
Measurement and control device.
The present invention, as heat carrier, is provided oxidative reaction atmosphere, can further decrease temperature using molten state basic salt,
The thermal efficiency is improved, the organic matter in industrial waste salt is completely removed, does not generate acid tail gas.
Compared with prior art, the invention has the following advantages:
(1) raw material of the present invention is easy to get, easy to operate.
(2) present invention does not generate noxious acidic gaseous and dioxin component compared with burning disposal, compared with landfill disposal
Waste land resource is avoided, investment is low with operating cost compared with existing heat treatment process, and can realize cleaning discharge.
(3) present invention can carry out harmless treatment to industrial waste salt, and carry out resource to the salt component in industrial waste salt
Change recycling.
Detailed description of the invention
Fig. 1 is schematic diagram of the embodiment of the present invention 1 using the device of alkaline melt harmless treatment industrial waste salt.
In figure, 1 is drier, and 2 be crusher, and 3 be dispenser, and 4 be heat exchanger, and 5 be frit reaction furnace, and 6 be deduster,
7 be the gas scrubbing tower of alkaline absorption solution, and 8 be the gas scrubbing tower of organic solvent absorbing liquid, and 9 be desalinization of soil by flooding or leaching device, and 10 be crystallization
Device.
Specific embodiment
A method of utilizing alkaline melt harmless treatment industrial waste salt, comprising the following steps:
(1) alkaline, inorganic salts are heated, melts salt body, is passed through oxidizing gas, is pre-processed；
(2) industrial waste salt is continuously passed through in basic mineral molten salt bath under the action of oxidizing gas carrier gas, is carried out anti-
It answers, the gas of generation discharges after treatment；
(3) after basic mineral molten salt bath exhausts, the slag of generation is taken out, high-purity is recycled after dissolving, recrystallizing
Product salt.
Preferably, the alkaline, inorganic salts are NaOH, LiOH, KOH, Mg (OH)2、Ba(OH)2、Na2CO3、K2CO3With
Li2CO3At least one of.
As a preferred embodiment of the present invention, the temperature heated in step (1) be higher than 100 DEG C of alkaline, inorganic salts fusing point with
On.The temperature further preferably heated in step (1) is 300-800 DEG C.
As a preferred embodiment of the present invention, the gaseous mixture of the oxidizing gas oxygen, air, nitrogen and oxygen
Or carbon dioxide.
As a preferred embodiment of the present invention, the pretreated time is 10~20min in step (1)；It is anti-in step (2)
Answering the residence time is 2~10min.
As a preferred embodiment of the present invention, the gas main component generated in step (2) includes CO2, CO, O2And N2
At least one of.
As a preferred embodiment of the present invention, in step (2), by industrial waste salt under the action of oxidizing gas carrier gas
Continuously it is passed through the bottom of basic mineral molten salt bath.
Using the device of alkaline melt harmless treatment industrial waste salt, be used for the above method, including frit reaction furnace and
Feeding mechanism, admission gear, exhaust port and the reacting furnace outlet being connected on frit reaction furnace；The frit reaction
Furnace is used as reaction vessel, and the feeding mechanism is used for the feed of industrial waste salt, and the admission gear is used for oxidizing gas
Be passed through, the exhaust port is connected with tail gas treating unit, and the reacting furnace outlet is used for the taking-up of slag.
As a preferred embodiment of the present invention, the tail gas treating unit includes that alkaline absorption solution and organic solvent are inhaled
Liquid is received, and is equipped with multicomponent gas on-Line Monitor Device.
As a preferred embodiment of the present invention, which is additionally provided with alkaline, inorganic salts supply port, for leading in the reaction
What the comprehensive method for crossing monitoring exhaust gas composition and slag composition judged the inorganic molten salt bath of frit reaction furnace neutral and alkali exhausts situation, with
Alkaline, inorganic salts are replenished in time.
As a preferred embodiment of the present invention, corrosion-resistant stainless steel or other alloy materials can be used in frit reaction furnace body
Material, reacting furnace is outer to be heated in such a way that electric heating, straight fire heating or heat radiation are heated.
As a preferred embodiment of the present invention, between each equipment of the device by corrosion-resistant piping connection, on pipeline
Equipped with pressure, temperature and flow measurement and control device.
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of device using alkaline melt harmless treatment industrial waste salt, schematic diagram are as shown in Figure 1, comprising:
Frit reaction furnace 5, the frit reaction furnace 5 are connected with gas lines；Gas, which amounts to, is connected with charging on pipeline
Mechanism, the feeding mechanism in the present embodiment includes sequentially connected drier 1, crusher 2 and dispenser 3, feeding mechanism and gas
The carrier gas conveying of industrial waste salt and being passed through for individual oxidizing gas are realized in the cooperation of body service；Exhaust port passes through
Heat exchanger 4 is connect with the gas scrubbing tower 8 of deduster 6, the gas scrubbing tower 7 of alkaline absorption solution and organic solvent absorbing liquid, real
The processing and discharge of existing tail gas；The reacting furnace outlet of bottom is connected with desalinization of soil by flooding or leaching device 9 and crystallization apparatus 10.In the present embodiment
Heat-exchanger rig can also provide thermal energy for drier.Industrial waste salt is passed into bottom in frit reaction furnace under the action of carrier gas,
And with molten state salt precursor reactant.After reaction, residue is excluded from bottom, is dissolved after cooling, and recrystallization can be recycled pure
Salt component.
The disposition of industrial waste salt is carried out with above-mentioned apparatus, the industrial waste salt in the present embodiment derives from pesticide producing process,
Main component are as follows: sodium chloride content about 75%, other inorganic contents about 6%, content of organics about 18%.Organic matter is halogenated
Hydro carbons, benzene series species complicated ingredient.
Processing method includes the following steps:
(1) for industrial waste salt after the low temperature drier in drier 1 is dried, moisture content is 0.5%~3%.Using 2
In pulverizer be crushed, make partial size in 20~200 mesh；
(2) KOH is added in frit reaction furnace 5, is heated to 600 DEG C by electric heating, KOH mixture is made to reach melting
State is passed through air 10min.The industrial waste salt after being crushed well is sent in frit reaction furnace 5 by dispenser 3 with air,
Flow velocity is 3L/min, delivery rate 1.5g/min；
(3) gas of the temperature in 600 DEG C, reacting furnace out in frit reaction furnace is controlled through heat exchanger (waste heat boiler)
4 are cooled to 200-250 DEG C, then the gas washing through deduster 6, the gas scrubbing tower 7 of alkaline absorption solution and organic solvent absorbing liquid
Tower 8 is washed, clean gas discharge is obtained.The main component of gained tail gas is CO2, CO, O2And N2；
(4) chlorine, bromine and sulphur are reacted with alkaline melt in industrial waste salt, production stablize harmless inorganic salts KCl, KBr and
K2SO4Deng, by desalinization of soil by flooding or leaching device 9 dissolve after, into carried out in crystallization apparatus 10 recrystallization substep recycle.
Before and after the processing, the total content of organic carbon in abraum salt (TOC) is reduced to 10mg/L from 25000mg/L or more, and NaCl contains
Amount is higher, and for complicated benzene homologues and halogenated hydrocarbons loss late 95% or more, product can be directly used for chlor-alkali work after simple separation
Industry raw material.
The above-mentioned description to embodiment is for ease of ordinary skill in the art to understand and use the invention.It is ripe
The personnel for knowing art technology obviously easily can make various modifications to these embodiments, and general original described herein
It ought to use in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, this field
Technical staff's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be in guarantors of the invention
Within the scope of shield.
Claims (10)
1. a kind of method using alkaline melt harmless treatment industrial waste salt, which comprises the following steps:
(1) alkaline, inorganic salts are heated, melts salt body, is passed through oxidizing gas, is pre-processed；
(2) industrial waste salt is continuously passed through in basic mineral molten salt bath under the action of oxidizing gas carrier gas, is reacted, produced
Raw gas discharges after treatment；
(3) after basic mineral molten salt bath exhausts, the slag of generation is taken out, the salt that high-purity is recycled after dissolving, recrystallizing produces
Product.
2. a kind of method using alkaline melt harmless treatment industrial waste salt according to claim 1, which is characterized in that
The alkaline, inorganic salts are NaOH, LiOH, KOH, Mg (OH)2、Ba(OH)2、Na2CO3、K2CO3And Li2CO3In at least one
Kind.
3. a kind of method using alkaline melt harmless treatment industrial waste salt according to claim 1, which is characterized in that
The temperature heated in step (1) is higher than 100 DEG C of alkaline, inorganic salts fusing point or more.
4. a kind of method using alkaline melt harmless treatment industrial waste salt according to claim 3, which is characterized in that
The temperature heated in step (1) is 300-800 DEG C.
5. a kind of method using alkaline melt harmless treatment industrial waste salt according to claim 1, which is characterized in that
The oxidizing gas oxygen, air, nitrogen and oxygen gaseous mixture or carbon dioxide.
6. a kind of method using alkaline melt harmless treatment industrial waste salt according to claim 1, which is characterized in that
The pretreated time is 10~20min in step (1)；Reaction time is 2~10min in step (2).
7. a kind of method using alkaline melt harmless treatment industrial waste salt according to claim 5, which is characterized in that
The gas main component generated in step (2) includes CO2, CO, O2And N2At least one of.
8. a kind of device using alkaline melt harmless treatment industrial waste salt, which is characterized in that be used for claim 1~7 times
Method described in one, including frit reaction furnace and the feeding mechanism being connected on frit reaction furnace, admission gear, exhaust emissions
Mouth and reacting furnace outlet；The frit reaction furnace is used as reaction vessel, and the feeding mechanism is given for industrial waste salt
Material, the admission gear are passed through for oxidizing gas, and the exhaust port is connected with tail gas treating unit, described
Reacting furnace outlet be used for slag taking-up.
9. the device according to claim 8 using alkaline melt harmless treatment industrial waste salt, which is characterized in that described
Tail gas treating unit include alkaline absorption solution and organic solvent absorbing liquid, and be equipped with multicomponent gas on-Line Monitor Device.
10. the device according to claim 9 using alkaline melt harmless treatment industrial waste salt, which is characterized in that should
Device is additionally provided with alkaline, inorganic salts supply port, for being sentenced in the reaction by the comprehensive method of monitoring exhaust gas composition and slag composition
The disconnected inorganic molten salt bath of frit reaction furnace neutral and alkali exhausts situation, alkaline, inorganic salts are replenished in time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910701051.XA CN110479734B (en) | 2019-07-31 | 2019-07-31 | Method and device for innocent treatment of industrial waste salt by using alkaline melt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910701051.XA CN110479734B (en) | 2019-07-31 | 2019-07-31 | Method and device for innocent treatment of industrial waste salt by using alkaline melt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110479734A true CN110479734A (en) | 2019-11-22 |
| CN110479734B CN110479734B (en) | 2021-05-11 |
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| CN111272946A (en) * | 2020-03-30 | 2020-06-12 | 合肥工业大学 | Device and method for measuring content of organic carbon in industrial waste salt |
| CN112474720A (en) * | 2020-11-09 | 2021-03-12 | 宿迁安湘环保科技有限公司 | Method for separating low-temperature inorganic salt in hazardous waste |
| CN114011852A (en) * | 2021-09-18 | 2022-02-08 | 昆明市生态环境科学研究院 | Harmless salinization treatment method for organic waste |
| CN115351032A (en) * | 2022-08-22 | 2022-11-18 | 宁夏瑞泰科技股份有限公司 | Method for recycling industrial waste salt |
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