CN108954344A - Industrial waste salt dregs innocent treatment method - Google Patents
Industrial waste salt dregs innocent treatment method Download PDFInfo
- Publication number
- CN108954344A CN108954344A CN201810850987.4A CN201810850987A CN108954344A CN 108954344 A CN108954344 A CN 108954344A CN 201810850987 A CN201810850987 A CN 201810850987A CN 108954344 A CN108954344 A CN 108954344A
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- Prior art keywords
- salt
- abraum
- dregs
- waste
- fused
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- 150000003839 salts Chemical class 0.000 title claims abstract description 223
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002440 industrial waste Substances 0.000 title claims abstract description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003546 flue gas Substances 0.000 claims abstract description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 14
- 238000012216 screening Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000002699 waste material Substances 0.000 claims description 42
- 238000002485 combustion reaction Methods 0.000 claims description 25
- 239000004744 fabric Substances 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 19
- 238000000197 pyrolysis Methods 0.000 claims description 18
- 239000002918 waste heat Substances 0.000 claims description 17
- 238000000227 grinding Methods 0.000 claims description 13
- 238000004064 recycling Methods 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 239000000047 product Substances 0.000 claims description 9
- 239000003517 fume Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011324 bead Substances 0.000 claims description 6
- 239000006227 byproduct Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000003805 vibration mixing Methods 0.000 claims description 6
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 6
- 238000013316 zoning Methods 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 description 7
- 239000002893 slag Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000012267 brine Substances 0.000 description 4
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003113 alkalizing effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 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
- 238000004227 thermal cracking Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/10—Drying by heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/80—Shredding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a kind of industrial waste salt dregs innocent treatment method, including it is screening pretreatment, dry pretreatment, oxygen blast fused salt, cooling broken with flue gas burning.Compared with prior art, the present invention has the characteristics that economic value is high, secondary pollution will not be caused to environment while improving heat utilization efficiency.
Description
Technical field
The present invention relates to environment protection field more particularly to a kind of industrial waste salt dregs innocent treatment methods.
Background technique
All conglomeraties such as organic synthesis industry, fine chemicals industry, pesticide industry, biological medicine industry are usually producing
In the process using alkalizing or acidification neutralization reaction, final result and generate a large amount of brine waste, however brine waste usually contains
There is miscellaneous organic product, all there is comparable toxicity, harmfulness, it is difficult to handle, therefore these high slat-containing wastewaters are deposited
It puts and harmlessness disposing is as the greatest problem in industry, many enterprises are all evaporated using heating at present in order to reduce waste liquid amount
Method brine waste is evaporated to obtain solid-state abraum salt, although this greatly reduces brine waste volume, the abraum salt generated is same
Sample can not be disposed, and abraum salt is also included in dangerous waste register by State Ministry of Environmental Protection at present, and constantly accumulation deposit will lead to serious environment
Hidden danger and pollution risk, once spreading and drenching out, it will cause huge Environment Pollution Events, while most of enterprise is a large amount of
The abraum salt accumulation deposit and status that can not be handled also brings very big environmental protection pressure to enterprise itself.According to incompletely statistics, entirely
The annual industrial waste salt yield of state reaches several ten million tons, and wherein the big province of chemical industry (such as Shandong, Jiangsu, Zhejiang) accounts for the 50% of total amount
More than.
Currently, existing disposal technology are as follows:
1, using direct flame combustion method, i.e., abraum salt powder is sprayed into incinerator, wherein organic matter decomposes broken at high temperature
It is bad, however general inorganic salts fusing point melts at high operating temperatures all at 800 DEG C or more, will cause incinerator and glues wall, resistance to material
The problems such as damage, equipment burn into flue blockage, it there are no the equipment of normal use at present.
2, general that carbonization technique is solved using hot (splitting) in view of the high-temperature fusion of inorganic salts carries out process modification, i.e., it will give up
Salt powder is continuously put into pyrolysis carbonization kiln, and organic matter therein is lower than inorganic salts melting temperature (being lower than 700 DEG C) and control oxygen
Atmospheric condition issues raw decomposition gasification, but although the technique solves the problems, such as inorganic salts melting, but since thermal cracking temperature is low,
Organic matter is caused not to be destroyed thoroughly, or even due to uncertain, the decomposition gas concentration change of organism kinds in abraum salt and content
Change and the safety problems such as explosion easily occur.
3, industrial waste salt landfill stabilization, due to abraum salt high water solubility, organic pollutant containing poisonous and harmful substance, to landfill yard
Sewerage causes fatal impact, needs to dispose depth after specification carries out stable curing according to national dangerous waste and fills.This method skill
Art difficulty (antiseepage, waterproof, leakproof etc.) is big, land occupation is big, and cost of investment is high, and two secondary environments are endangered caused by having because of factors such as geological disasters
Harmful risk.
In conclusion domestic at present, there has been no the effective ways that one kind can be successfully processed industrial waste salt, are allowed to processing collection
Middleization, industrialization, recycling.
Summary of the invention
Goal of the invention: in view of the deficiencies of the prior art with defect, the present invention provide a kind of economic value it is high, will not be to environment
It causes secondary pollution while improving the industrial waste salt dregs innocent treatment method of heat utilization efficiency.
Technical solution: industrial waste salt dregs innocent treatment method of the invention, it is characterised in that: include the following steps:
(1) screening pretreatment: according to classification to the cloth area for entering molten salt furnace after waste salt dregs progress crushing and screening, waste salt dregs
It is divided into two layers, one layer carries out material envelope to feed inlet, is delivered to fused salt room after another floor vibration mixing；
(2) dry pretreatment: using the fume afterheat of fused salt room as drying source, pass through abraum salt dry section in waste salt dregs
When dry removal 80%-90% free water；
(3) oxygen blast fused salt: waste salt dregs after dry behind abraum salt pyrolysis zone by into abraum salt workspace oxygen blast burn
Waste salt dregs are heated to fused solution, control melting temperature is 1120 DEG C~1180 DEG C, and the salt slurry of liquid flows into molten salt pool, control
Molten salt pool temperature is 920 DEG C~980 DEG C；
(4) cooling broken: molten salt pool taking-up to be cooled down, condensed salt block, which enters crusher and is crushed to volume, is
10cm3Blocks of solid below obtains powdery product after grinding to blocks of solid；
(5) flue gas burns: the flue gas that fused salt room generates enters secondary combustion chamber and is burned, and control incineration temperature is 1080
DEG C~1130 DEG C, the burning residence time be 2s or more, the tail gas of generation enter waste heat boiler carry out waste heat recycling, byproduct steam into
Enter steam reuse pipe network and carries out reuse.
Wherein, the molten salt furnace is using zoning design, and furnace body left side is from top to bottom successively arranged cloth area and fused salt
Room is simultaneously equipped in exhaust gases passes and fused salt room between cloth area and fused salt room and is from top to bottom successively arranged abraum salt dry section, abraum salt
Pyrolysis zone and abraum salt workspace, furnace body right side are from top to bottom successively arranged secondary combustion chamber and molten salt pool and secondary combustion chamber side
Side connect with exhaust gases passes and connect in other side side with flue gas outlet；Fused salt room bottom is for ramp structure and on slope
Bottom is connect with molten salt pool；Cloth area side is equipped with feed inlet.
Wherein, the fused salt room, secondary combustion chamber and molten salt pool side are equipped with auxiliary combustion equipment.
Wherein, the fused salt inner flue gas of the stove through abraum salt workspace, abraum salt pyrolysis zone, abraum salt dry section, cloth area and gives up
Exhaust gases passes between salt dry section, into secondary combustion chamber then after be discharged into from the flue gas outlet of secondary combustion chamber side
The channel being connect with waste heat boiler.
Wherein, it is the zirconium oxide bead ball of 0.1mm~0.3mm as grinding medium that diameter is added when grinding in the step
Matter.
Wherein, the reuse pipe network in the step includes the personal steam pipe network of plant area and urban steam pipe network system.
The utility model has the advantages that compared with prior art, the present invention has following remarkable advantage: it is reasonable to waste salt dregs that the present invention passes through
Classification disposition, can effectively realize the recycling and value maximization of salt slag；Waste salt dregs are made product, and to flue gas into
The tail gas of row second-time burning, generation carries out waste heat recycling, secondary pollution will not be caused to environment, while improving heat utilization efficiency；It is logical
The zoning design of abraum salt dry section, abraum salt pyrolysis zone and abraum salt workspace is crossed, improve heat utilization rate prevents inorganic salts from escaping simultaneously
Ease；It realizes the unification of environment, society, economy truly, disposes closed-loop, embody circular economy value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of molten salt furnace of the invention；
1 it is cloth area in figure, 2 be abraum salt dry section, 3 be abraum salt pyrolysis zone, 4 be abraum salt workspace, 5 be fused salt room, 6 is
Secondary combustion chamber, 7 are molten salt pool.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further described technical solution of the present invention.
Industrial waste salt dregs innocent treatment method of the invention, includes the following steps:
(1) screening pretreatment: according to classification to the cloth area 1 for entering molten salt furnace after waste salt dregs progress crushing and screening, abraum salt
Slag is divided into two layers, and one layer carries out material envelope to feed inlet, is delivered to fused salt room 5 after another floor vibration mixing；
(2) dry pretreatment: dry by abraum salt in waste salt dregs using the fume afterheat of fused salt room 5 as drying source
The free water of dry removal 80%-90% when area 2；
(3) oxygen blast fused salt: waste salt dregs after dry behind abraum salt pyrolysis zone 3 by into abraum salt workspace 4 oxygen blast fire
It burns and waste salt dregs is heated to fused solution, control melting temperature is 1120 DEG C~1180 DEG C, and the salt slurry of liquid flows into molten salt pool 7,
Controlling 7 temperature of molten salt pool is 920 DEG C~980 DEG C；
(4) cooling broken: the taking-up of molten salt pool 7 to be cooled down, condensed salt block, which enters crusher and is crushed to volume, is
10cm3Blocks of solid below obtains powdery product after grinding to blocks of solid；It is 0.1mm that diameter is added when grinding
The zirconium oxide bead ball of~0.3mm is as abrasive media；
(5) flue gas burns: the flue gas that fused salt room 5 generates enters secondary combustion chamber 6 and is burned, and control incineration temperature is
1080 DEG C~1130 DEG C, the burning residence time is 2s or more, and the tail gas of generation enters waste heat boiler and carries out waste heat recycling, and by-product steams
Vapour enters steam reuse pipe network and carries out reuse；Wherein, reuse pipe network includes the personal steam pipe network of plant area and urban steam pipe network system.
Wherein, molten salt furnace is using zoning design, and furnace body left side is from top to bottom successively arranged cloth area 1 and fused salt room 5 simultaneously
It is equipped in exhaust gases passes and fused salt room 5 between cloth area 1 and fused salt room 5 and is from top to bottom successively arranged abraum salt dry section 2, abraum salt
Pyrolysis zone 3 and abraum salt workspace 4, furnace body right side are from top to bottom successively arranged secondary combustion chamber 6 and molten salt pool 7 and secondary combustion chamber
6 sides side connect with exhaust gases passes and connect in other side side with flue gas outlet；5 bottom of fused salt room be ramp structure and
Bottom of slope is connect with molten salt pool 7；1 side of cloth area is equipped with feed inlet.Fused salt room 5, secondary combustion chamber 6 and 7 side of molten salt pool are equipped with
Auxiliary combustion equipment.
Wherein, fused salt inner flue gas of the stove is through abraum salt workspace 4, abraum salt pyrolysis zone 3, abraum salt dry section 2, cloth area 1 and abraum salt
Exhaust gases passes between dry section 2, into secondary combustion chamber 6 then after from the flue gas outlet of 6 side of secondary combustion chamber be discharged into
Enter the channel connecting with waste heat boiler.
Embodiment 1: the industrial waste salt dregs innocent treatment method of the present embodiment includes the following steps:
(1) screening pretreatment: according to classification to the cloth area 1 for entering molten salt furnace after waste salt dregs progress crushing and screening, abraum salt
Slag is divided into two layers, and one layer carries out material envelope to feed inlet, is delivered to fused salt room 5 after another floor vibration mixing；
(2) dry pretreatment: dry by abraum salt in waste salt dregs using the fume afterheat of fused salt room 5 as drying source
The free water of dry removal 80%-90% when area 2；
(3) oxygen blast fused salt: waste salt dregs after dry behind abraum salt pyrolysis zone 3 by into abraum salt workspace 4 oxygen blast fire
It burns and waste salt dregs is heated to fused solution, control melting temperature is 1150 DEG C, and the salt slurry of liquid flows into molten salt pool 7, controls fused salt
7 temperature of pond is 950 DEG C；
(4) cooling broken: the taking-up of molten salt pool 7 to be cooled down, condensed salt block, which enters crusher and is crushed to volume, is
10cm3Blocks of solid below obtains powdery product after grinding to blocks of solid；It is 0.2mm that diameter is added when grinding
Zirconium oxide bead ball as abrasive media；
(5) flue gas burns: the flue gas that fused salt room 5 generates enters secondary combustion chamber 6 and is burned, and control incineration temperature is
1100 DEG C, the burning residence time is 2s or more, and the tail gas of generation enters waste heat boiler and carries out waste heat recycling, and byproduct steam enters steaming
Vapour reuse pipe network carries out reuse；Wherein, reuse pipe network is the personal steam pipe network of plant area.
Embodiment 2: industrial waste salt dregs innocent treatment method includes the following steps:
(1) screening pretreatment: according to classification to the cloth area 1 for entering molten salt furnace after waste salt dregs progress crushing and screening, abraum salt
Slag is divided into two layers, and one layer carries out material envelope to feed inlet, is delivered to fused salt room 5 after another floor vibration mixing；
(2) dry pretreatment: dry by abraum salt in waste salt dregs using the fume afterheat of fused salt room 5 as drying source
The free water of dry removal 80%-90% when area 2；
(3) oxygen blast fused salt: waste salt dregs after dry behind abraum salt pyrolysis zone 3 by into abraum salt workspace 4 oxygen blast fire
It burns and waste salt dregs is heated to fused solution, control melting temperature is 1120 DEG C, and the salt slurry of liquid flows into molten salt pool 7, controls fused salt
7 temperature of pond is 920 DEG C；
(4) cooling broken: the taking-up of molten salt pool 7 to be cooled down, condensed salt block, which enters crusher and is crushed to volume, is
10cm3Blocks of solid below obtains powdery product after grinding to blocks of solid；It is 0.1mm that diameter is added when grinding
Zirconium oxide bead ball as abrasive media；
(5) flue gas burns: the flue gas that fused salt room 5 generates enters secondary combustion chamber 6 and is burned, and control incineration temperature is
1080 DEG C, the burning residence time is 2s or more, and the tail gas of generation enters waste heat boiler and carries out waste heat recycling, and byproduct steam enters steaming
Vapour reuse pipe network carries out reuse；Wherein, reuse pipe network is urban steam pipe network system.
Embodiment 3: the industrial waste salt dregs innocent treatment method of the present embodiment includes the following steps:
(1) screening pretreatment: according to classification to the cloth area 1 for entering molten salt furnace after waste salt dregs progress crushing and screening, abraum salt
Slag is divided into two layers, and one layer carries out material envelope to feed inlet, is delivered to fused salt room 5 after another floor vibration mixing；
(2) dry pretreatment: dry by abraum salt in waste salt dregs using the fume afterheat of fused salt room 5 as drying source
The free water of dry removal 80%-90% when area 2；
(3) oxygen blast fused salt: waste salt dregs after dry behind abraum salt pyrolysis zone 3 by into abraum salt workspace 4 oxygen blast fire
It burns and waste salt dregs is heated to fused solution, control melting temperature is 1180 DEG C, and the salt slurry of liquid flows into molten salt pool 7, controls fused salt
7 temperature of pond is 980 DEG C；
(4) cooling broken: the taking-up of molten salt pool 7 to be cooled down, condensed salt block, which enters crusher and is crushed to volume, is
10cm3Blocks of solid below obtains powdery product after grinding to blocks of solid；It is 0.3mm that diameter is added when grinding
Zirconium oxide bead ball as abrasive media；
(5) flue gas burns: the flue gas that fused salt room 5 generates enters secondary combustion chamber 6 and is burned, and control incineration temperature is
1130 DEG C, the burning residence time is 2s or more, and the tail gas of generation enters waste heat boiler and carries out waste heat recycling, and byproduct steam enters steaming
Vapour reuse pipe network carries out reuse；Wherein, reuse pipe network includes the personal steam pipe network of plant area and urban steam pipe network system.
The present invention has following technological break-through:
The present invention is equipped with cloth area 1, the screened pretreatment fed to boiler of waste salt dregs, and coarse abraum salt further grinds to be crushed and sieve again
Point, distributing device uses mechanical oscillation screening plant uniform distribution, so that the bed of material is uniform, flue gas overcurrent good permeability.The bed of material is divided into
Two subregions are sealed by material and realize that isolation outside air is scurried into, guarantee that system pressure is constant.
The present invention feature (essentially 3%~5%) not high for general industry waste salt dregs content of organics, solves biography
The problems such as molten salt furnace technique heat waste of uniting is big, energy consumption is high, inorganic salts steam and dust are to the slagging of furnace wall, wall built-up, flue blockage is led to
Cross the zoning design of abraum salt dry section 2, abraum salt pyrolysis zone 3 and abraum salt workspace 4, advantage one: the thermal efficiency is high, makes full use of fused salt
High-temperature flue gas carries out pyrolysis and irritated processing to subsequent processing waste salt dregs, substantially increases fume afterheat utilization rate, reduces simultaneously
Fuel consumption, energy conservation reach 50% or more, it can be achieved that big production capacity disposition；Advantage two: by zoning design, melting is effectively solved
The escape problem of state inorganic salts, molten state inorganic salts can not pass through abraum salt pyrolysis zone 3 and abraum salt dry section 2, greatly reduce flue gas
The content of middle inorganic salts solves the blocking, etching problem of system exhaust gases passes etc..
Product is made in waste salt dregs by the present invention, and carries out second-time burning to flue gas, and the tail gas of generation carries out waste heat recycling, no
Secondary pollution can be caused to environment, while improve heat utilization efficiency.
The present invention can effectively realize the recycling and Maximum Value of salt slag by disposition of reasonably classifying to waste salt dregs
Change.Overall merit through pilot-plant technical and economic performance, about 1500 yuan/ton of waste salt dregs cost of disposal, for 30000 tons/year
About 40,000,000 yuan of the gross investment of disposition scale, by the center that centrally disposes, charge 5000 yuan/ton and recycling is worth based on 200 yuan/ton,
Annual value of production 1.1 hundred million can be achieved, with traditional handicraft compared with economic benefit protrusion realizes environment truly, society, economy
It is unified, closed-loop is disposed, circular economy value is embodied.
Claims (6)
1. industrial waste salt dregs innocent treatment method, it is characterised in that: include the following steps:
(1) screening pretreatment: according to classification to the cloth area (1) for entering molten salt furnace after waste salt dregs progress crushing and screening, waste salt dregs
It is divided into two layers, one layer carries out material envelope to feed inlet, is delivered to fused salt room (5) after another floor vibration mixing；
(2) dry pretreatment: using the fume afterheat of fused salt room (5) as drying source, pass through abraum salt dry section in waste salt dregs
(2) free water of dry removal 80%-90% when；
(3) oxygen blast fused salt: the waste salt dregs after dry are after abraum salt pyrolysis zone (3) by firing to abraum salt workspace (4) interior oxygen blast
It burns and waste salt dregs is heated to fused solution, control melting temperature is 1120 DEG C~1180 DEG C, and the salt slurry of liquid flows into molten salt pool
(7), control molten salt pool (7) temperature is 920 DEG C~980 DEG C；
(4) cooling broken: molten salt pool (7) being taken out and are cooled down, condensed salt block, which enters crusher and is crushed to volume, is
10cm3Blocks of solid below obtains powdery product after grinding to blocks of solid；
(5) flue gas burns: the flue gas that fused salt room (5) generate enters secondary combustion chamber (6) and is burned, and control incineration temperature is
1080 DEG C~1130 DEG C, the burning residence time is 2s or more, and the tail gas of generation enters waste heat boiler and carries out waste heat recycling, and by-product steams
Vapour enters steam reuse pipe network and carries out reuse.
2. industrial waste salt dregs innocent treatment method according to claim 1, it is characterised in that: the molten salt furnace is to adopt
With zoning design, furnace body left side is from top to bottom successively arranged cloth area (1) and fused salt room (5) and in cloth area (1) and fused salt room
(5) be equipped between in exhaust gases passes and fused salt room (5) be from top to bottom successively arranged abraum salt dry section (2), abraum salt pyrolysis zone (3) with
Abraum salt workspace (4), furnace body right side are from top to bottom successively arranged secondary combustion chamber (6) and molten salt pool (7) and secondary combustion chamber (6)
Side side connect with exhaust gases passes and connect in other side side with flue gas outlet；Fused salt room (5) bottom is slope knot
Structure is simultaneously connect in bottom of slope with molten salt pool (7)；Cloth area (1) side is equipped with feed inlet.
3. industrial waste salt dregs innocent treatment method according to claim 2, it is characterised in that: the fused salt room (5),
Secondary combustion chamber (6) and molten salt pool (7) side are equipped with auxiliary combustion equipment.
4. industrial waste salt dregs innocent treatment method according to claim 1 to 3, it is characterised in that: in the molten salt furnace
Flue gas is through between abraum salt workspace (4), abraum salt pyrolysis zone (3), abraum salt dry section (2), cloth area (1) and abraum salt dry section (2)
Exhaust gases passes, into secondary combustion chamber (6) then after be discharged into from the flue gas outlet of secondary combustion chamber (6) side and waste heat
The channel of boiler connection.
5. industrial waste salt dregs innocent treatment method according to claim 1, it is characterised in that: in the step (4)
It is the zirconium oxide bead ball of 0.1mm~0.3mm as abrasive media that diameter is added when grinding.
6. industrial waste salt dregs innocent treatment method according to claim 1, it is characterised in that: in the step (5)
Reuse pipe network include that plant area uses by oneself steam pipe network and urban steam pipe network system.
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| CN109865734A (en) * | 2019-03-13 | 2019-06-11 | 兰州有色冶金设计研究院有限公司 | A method of vitreum is produced using chemical industry abraum salt |
| CN110615451A (en) * | 2019-10-21 | 2019-12-27 | 博天环境集团股份有限公司 | Method and system for recycling and harmlessly treating salt in high-salt-content wastewater |
| CN111112296A (en) * | 2019-12-27 | 2020-05-08 | 洛南环亚源铜业有限公司 | Resource utilization treatment method for industrial waste salt |
| CN111790731A (en) * | 2020-07-20 | 2020-10-20 | 杭州碳氢科技研究有限公司 | Industrial waste salt conversion device and method |
| CN112344338A (en) * | 2020-10-30 | 2021-02-09 | 南京工大环境科技有限公司 | Thermo-chemical treatment based harmless method for medical waste salt |
| CN115283400A (en) * | 2022-08-12 | 2022-11-04 | 上海康思特新材料有限公司 | Industrial waste salt three-fluid oxygen-enriched treatment device, system and process |
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