CN115872464A - Solid slag recycling method and device - Google Patents
Solid slag recycling method and device Download PDFInfo
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- CN115872464A CN115872464A CN202111154570.2A CN202111154570A CN115872464A CN 115872464 A CN115872464 A CN 115872464A CN 202111154570 A CN202111154570 A CN 202111154570A CN 115872464 A CN115872464 A CN 115872464A
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- 239000007787 solid Substances 0.000 title claims abstract description 70
- 239000002893 slag Substances 0.000 title claims abstract description 60
- 238000004064 recycling Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000002485 combustion reaction Methods 0.000 claims abstract description 73
- 238000000926 separation method Methods 0.000 claims abstract description 52
- 238000002425 crystallisation Methods 0.000 claims abstract description 43
- 230000008025 crystallization Effects 0.000 claims abstract description 42
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 36
- 238000002386 leaching Methods 0.000 claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 20
- 239000012265 solid product Substances 0.000 claims abstract description 17
- 238000000197 pyrolysis Methods 0.000 claims abstract description 16
- 239000003546 flue gas Substances 0.000 claims abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003513 alkali Substances 0.000 claims abstract description 10
- 239000007791 liquid phase Substances 0.000 claims abstract description 10
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 claims abstract description 10
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000012452 mother liquor Substances 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 12
- 239000000047 product Substances 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229910052720 vanadium Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 3
- 230000009347 mechanical transmission Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 11
- 239000002910 solid waste Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 101100002917 Caenorhabditis elegans ash-2 gene Proteins 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- CMZUMMUJMWNLFH-UHFFFAOYSA-N sodium metavanadate Chemical compound [Na+].[O-][V](=O)=O CMZUMMUJMWNLFH-UHFFFAOYSA-N 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 229910000166 zirconium phosphate Inorganic materials 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the field of solid slag treatment, and provides a solid slag recycling method and a solid slag recycling device. The solid slag recycling treatment method comprises the steps of feeding solid slag containing carbon and heavy metals into a multi-layer combustion chamber, enabling the solid slag to be in countercurrent contact with flue gas, sequentially drying, pyrolyzing, combusting and burning out in a drying area, a pyrolysis area, a combustion area and a burning-out area, removing residual carbon and moisture to obtain burning embers rich in the heavy metals, collecting the burning embers rich in the heavy metals, feeding the burning embers rich in the heavy metals into an alkaline leaching separation unit to be in contact with alkali liquor to obtain a solid product rich in nickel hydroxide and a liquid-phase leachate, and feeding the liquid-phase leachate to a crystallization separation unit to be subjected to crystallization separation to obtain a solid rich in vanadate. The invention realizes the recovery and resource utilization of heavy metals and greatly improves the economic benefit of the environment-friendly device.
Description
Technical Field
The invention belongs to the field of solid slag treatment, and particularly relates to a solid slag recycling method and device, which can realize reduction, harmless and recycling treatment on solid slag.
Background
With the improvement of the environmental protection requirement, the standard requirement on the classification treatment of the solid wastes is higher and higher. The newly issued solid waste pollution environment prevention and control law clearly indicates that: the environmental pollution prevention and control of the solid wastes are subject to the principles of reduction, reclamation and harmlessness, and the comprehensive utilization of the solid wastes is promoted. The solid slag containing carbon and heavy metal has large discharge amount, low heat value and complex components, and besides conventional metal, the solid slag also contains valuable elements such as nickel, vanadium, molybdenum and the like with higher value, thereby having large treatment difficulty and high disposal cost. The fluidized bed or the rotary kiln is directly used for harmless incineration, the heat energy consumption is high, the flue gas purification process is complex, and residues are buried as hazardous wastes, so that the resource waste is caused, and the requirement of circular economy cannot be met.
The solid slag containing carbon and heavy metals is subjected to resource treatment of valuable metal recovery, and no experience of successful application exists in China. The traditional incineration treatment has high cost, brings economic burden to enterprises, has innovative carbon and heavy metal containing solid waste technology, meets the requirements of environmental regulations and recycling economy, and can realize harmless treatment and resource utilization of solid waste.
Disclosure of Invention
The invention aims to provide a solid slag recycling method and a solid slag recycling device aiming at the defects of the prior art, the method can reduce solid slag containing carbon and heavy metals and then recycle heavy metal resources, and the solid slag can be harmlessly treated and recycled to the greatest extent.
In order to achieve the above object, a first aspect of the present invention provides a solid slag recycling method, including:
(1) Feeding solid slag containing carbon and heavy metals into a multi-layer combustion chamber, enabling the solid slag to be in countercurrent contact with flue gas, sequentially drying, pyrolyzing, combusting and burning out in a drying zone, a pyrolysis zone, a combustion zone and a burning-out zone, and removing residual carbon and moisture to obtain incineration ember rich in heavy metals;
(2) Collecting the incineration residue rich in heavy metals, and then sending the incineration residue rich in heavy metals to an alkaline leaching separation unit to contact with alkali liquor to obtain a solid product rich in nickel hydroxide and a liquid-phase leaching solution;
(3) And (4) sending the liquid-phase leaching solution to a crystallization separation unit for crystallization separation to obtain a solid rich in vanadate.
The second aspect of the invention provides a solid slag recycling device, which comprises a multilayer combustion chamber, an alkaline leaching separation unit and a crystallization separation unit;
the top of the multi-layer combustion chamber is connected with a solid slag feeding pipeline, and a discharging pipeline at the bottom is sequentially connected with an alkaline leaching separation unit and a crystallization separation unit; the multi-layer combustion chamber is internally provided with a drying zone, a pyrolysis zone, a combustion zone and a burn-out zone from top to bottom in sequence, at least one layer of combustion chamber is arranged in each zone, each layer of combustion chamber is provided with a heating device and a temperature control device, and a material channel is arranged between every two adjacent combustion chambers;
the alkaline leaching separation unit is provided with an alkaline liquor feeding pipeline and a solid product discharging pipeline, and the crystallization separation unit is provided with a crystallization product discharging pipeline.
The invention has the following effects: the solid slag containing carbon and heavy metal enters a multilayer combustion chamber, and the temperature of the combustion chamber is controlled in a layering way through the processes of drying, pyrolysis, combustion, burning-out and the like, so that most of water in the solid slag is evaporated and the carbon is fully combusted, the final waste residue product is greatly reduced, the efficient decrement of the solid slag is realized, and the treatment cost of subsequent waste residues is reduced. The obtained incineration residue with a small amount of enriched heavy metals is subjected to the working procedures of alkaline leaching separation, crystallization separation and the like to respectively obtain valuable metal products rich in nickel hydroxide and vanadate, so that the recovery and resource utilization of the heavy metals are realized, and the economic benefit of the environment-friendly device is greatly improved. In addition, high-temperature flue gas generated by the multi-layer combustion chambers generates high-pressure steam through the waste heat boiler, so that energy is recovered, and the energy consumption of the device is reduced.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
FIG. 1 is a schematic flow chart of a solid slag recycling method and a solid slag recycling device according to an embodiment of the invention.
Description of reference numerals:
a-a multi-layer combustion chamber, A1-a drying zone, A2-a pyrolysis zone, A3-a combustion zone, A4-an after-combustion zone, A10-a drying zone burner/burner group, A20-a pyrolysis zone burner/burner group, A30-a combustion zone burner/burner group, A40-an after-combustion zone burner/burner group, B-an alkaline leaching separation unit, and C-a crystallization separation unit;
1-solid slag containing carbon and heavy metals, 2-incineration ember, 3-liquid-phase leachate, 4-solid product rich in nickel hydroxide, 5-solid product rich in vanadate, 6, 8, 10 and 12-fuels of each combustor/combustor group, 7, 9, 11 and 13-combustion-supporting air of each combustor/combustor group, 14-flue gas, 15-crystallization mother liquor, 16-circulation mother liquor and 17-supplementary alkali.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein.
The invention also provides a solid slag recycling treatment method, which comprises the following steps:
(1) Sending solid slag containing carbon and heavy metals into a multi-layer combustion chamber A, enabling the solid slag to be in countercurrent contact with flue gas, sequentially drying, pyrolyzing, combusting and burning out in a drying area A1, a pyrolysis area A2, a combustion area A3 and a burning-out area A4, and removing residual carbon and moisture to obtain burning-out ember rich in heavy metals;
(2) Collecting the incineration residue rich in heavy metals, and then sending the incineration residue rich in heavy metals to an alkaline leaching separation unit B to contact with alkali liquor to obtain a solid product rich in nickel hydroxide and a liquid-phase leaching solution;
(3) And (4) sending the liquid-phase leaching solution to a crystallization separation unit C for crystallization separation to obtain a solid rich in vanadate.
According to a preferred embodiment of the present invention, the incineration ash rich in heavy metals is collected, alkaline leached at 20 to 200 ℃, and subjected to flash separation to obtain the solid product rich in nickel hydroxide.
According to a preferred embodiment of the present invention, the crystallization mother liquor obtained in the crystallization separation unit C is recycled to the alkaline leaching separation unit B, and the alkali is replenished through a crystallization mother liquor recycle line.
The zones allow different processes to be performed in different zones, and the temperature of each zone can be independently controlled. According to a preferred embodiment of the present invention, the temperature of the drying zone A1 is controlled to be 140 to 220 ℃; the temperature of the pyrolysis zone A2 is controlled to be 220-260 ℃; the temperature of the combustion area A3 is controlled to be 360-480 ℃; the temperature of the burnout zone A4 is controlled to be 380-460 ℃.
The lye addition can be determined according to the amount of incineration ash to be disposed of, preferably with a flow ratio of incineration ash to lye of 1.
The alkaline leaching conditions may include: the temperature is 30-120 deg.C, and the pressure is normal pressure. Better alkali treatment effect can be realized by adopting the conditions.
The invention provides a solid slag recycling device, which comprises a multilayer combustion chamber A, an alkaline leaching separation unit B and a crystallization separation unit C, wherein the multilayer combustion chamber A is provided with a plurality of combustion chambers;
the top of the multi-layer combustion chamber A is connected with a solid slag feeding pipeline, and the bottom discharging pipeline is sequentially connected with an alkaline leaching separation unit B and a crystallization separation unit C; the multi-layer combustion chamber A is internally provided with a drying zone A1, a pyrolysis zone A2, a combustion zone A3 and a burn-out zone A4 from top to bottom in sequence, at least one layer of combustion chamber is arranged in each zone, each layer of combustion chamber is provided with a heating device and a temperature control device, and a material channel is arranged between every two adjacent combustion chambers;
the alkaline leaching separation unit B is provided with an alkaline liquor feeding pipeline and a solid product discharging pipeline, and the crystallization separation unit C is provided with a crystallization product discharging pipeline.
According to a preferred embodiment of the invention, each layer of combustion chamber is provided with a descending material channel at different positions, and the material channel is internally provided with a mechanical transmission device with rake teeth, so that the solid phase flows from top to bottom in the multilayer combustion chambers, and the retention time of the solid slag in the multilayer combustion chambers can be adjusted by the rotating speed of the mechanical rotation device.
According to the invention, the number of combustion chambers per functional zone of the multi-layer combustion chamber A can be determined as desired, and generally 1 to 8 layers of combustion chambers can be provided in each zone.
According to a preferred embodiment of the present invention, as shown in fig. 1, 4 burners can be arranged in each layer of combustion chamber, and the burners are symmetrically arranged, so that the combustion chambers can be uniformly heated.
According to a preferred embodiment of the invention, 4 thermocouples are provided for each combustion chamber, symmetrically arranged. The fuel and the combustion-supporting air quantity of the layer corresponding to the combustor are controlled by the average temperature value of 4 thermocouples.
According to a preferred embodiment of the present invention, the crystallization separation unit C is provided with a crystallization mother liquor recycle line, which is merged with a make-up lye line into the lye feed line.
The device is suitable for the resource treatment of solid slag containing carbon and heavy metals, wherein the heavy metals comprise one or two of nickel and vanadium, the solid product obtained for the solid slag is a solid product rich in nickel hydroxide, and the crystallization product is a solid rich in vanadate.
According to a preferred embodiment of the invention, the top of the multi-layer combustion chamber is provided with a flue gas exhaust line.
The present invention will be described in more detail with reference to the following examples.
Example 1
The solid slag recycling treatment device shown in the attached figure 1 is adopted, and comprises a multilayer combustion chamber A, an alkaline leaching separation unit B and a crystallization separation unit C;
the top of the multi-layer combustion chamber A is connected with a solid slag feeding pipeline, and a bottom discharging pipeline is sequentially connected with an alkaline leaching separation unit B and a crystallization separation unit C; wherein, multilayer combustion chamber A is inside to include 18 layers of combustion chamber, divide into drying zone A1 (5 layers), pyrolysis zone A2 (4 layers), combustion zone A3 (4 layers), burn-out zone A4 (5 layers) from top to bottom in proper order. Each layer of combustion chamber is provided with 4 burners which are symmetrically arranged. 4 thermocouples are arranged in each layer of combustion chamber and are symmetrically arranged (not shown), and the fuel and the combustion-supporting air quantity of the layer corresponding to the combustor are controlled by the average temperature value of the 4 thermocouples. The downward channels are arranged at different positions of each layer of combustion chamber, and the mechanical rotating equipment with rake teeth is arranged at the same time, so that the solid phase flows from top to bottom in the multiple layers of combustion chambers, and the retention time of the solid slag in the multiple layers of combustion chambers can be adjusted by the rotating speed of the mechanical rotating equipment.
The alkaline leaching separation unit B is provided with an alkaline liquor feeding pipeline and a solid product discharging pipeline, the crystallization separation unit C is provided with a crystallization product discharging pipeline and a crystallization mother liquor circulating pipeline, and the crystallization mother liquor circulating pipeline and a supplementary alkaline liquor pipeline are converged into the alkaline liquor feeding pipeline.
The solid slag recycling treatment method adopting the solid slag recycling treatment device comprises the following steps:
the solid slag 1 containing carbon and heavy metals enters a drying area A1 from a solid slag feeding pipeline at the top of a multi-layer combustion chamber A, and is in countercurrent contact with hot flue gas for drying to remove moisture, and the temperature of the drying area A1 is controlled to be 200 ℃; then the organic matter is decomposed in a pyrolysis area A2, and the temperature of the pyrolysis area A2 is controlled to be 250 ℃; after pyrolysis, the solid slag enters a combustion area A3 to remove combustible components, the temperature of the combustion area A3 is controlled to be 450 ℃ so as to ensure the complete combustion of carbon components and simultaneously prevent heavy metals such as Ni and V components from sublimating or gasifying as far as possible; the solid slag enters an after-burning zone A4, the temperature of the after-burning zone A4 is controlled to be 400 ℃, the flow rate of the incineration after-burning 2 coming out from the bottom of the after-burning zone is about 160kg/h, the incineration after-burning 2 is conveyed to an alkaline leaching separation unit B through a bottom discharge pipeline, and the flue gas 14 of the multi-layer combustion chamber is discharged from a flue gas discharge pipeline of a top combustion chamber.
In the alkaline leaching separation unit B, the incineration ash 2 was mixed with a circulating mother liquor 16 at a flow ratio of 1.
The liquid phase leachate obtained by filtering is cooled and crystallized in a crystallization separation unit C, and then a solid product 5 rich in sodium vanadate is separated, wherein the flow rate is about 140kg/h. The alkaline recycle mother liquor 16 obtained after mixing the make-up base 17 (30% NaOH solution) with the crystallization mother liquor is returned to the alkaline leaching separation unit B for recycling through an alkaline feed line, and the flow rate of the make-up base 17 is about 120kg/h.
Wherein the solid slag 1 containing carbon and heavy metals is solid slag (solid filter cake) from a POX device, the flow rate is 10t/h, the water content is 80 percent, and the other components are 20 percent. In the other components, the carbon content is 90%, and further, the content of NiS/NiO is about 4% and V is 4% 2 O 3 /V 2 O 4 And (4) components.
The fuel 6, 8, 10, 12 of each burner/burner group adopted in the present embodiment is natural gas, and the combustion air 7, 9, 11, 13 of each burner/burner group adopted is air. The retention time of the solid slag 1 containing carbon and heavy metals in the multi-layer combustion chamber is kept at 2h.
While embodiments of the present invention have been described above, the above description is illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A solid slag recycling treatment method is characterized by comprising the following steps:
(1) Sending solid slag containing carbon and heavy metals into a multilayer combustion chamber (A), enabling the solid slag to be in countercurrent contact with flue gas, sequentially drying, pyrolyzing, combusting and burning out in a drying area (A1), a pyrolysis area (A2), a combustion area (A3) and a burning-out area (A4), and removing residual carbon and moisture to obtain burning-out ember rich in heavy metals;
(2) Collecting the incineration residue rich in heavy metals, and then sending the incineration residue rich in heavy metals to an alkaline leaching separation unit (B) to contact with alkali liquor to obtain a solid product rich in nickel hydroxide and a liquid-phase leachate;
(3) And (5) sending the liquid-phase leachate to a crystallization separation unit (C) for crystallization separation to obtain a solid rich in vanadate.
2. The method of claim 1, wherein the solid residue is collected and then subjected to alkaline leaching at 20 to 200 ℃ and flash separation to obtain the solid product rich in nickel hydroxide.
3. The solid residue recycling method according to claim 1, wherein the crystallization mother liquor obtained in the crystallization separation unit (C) is recycled to the alkaline leaching separation unit (B), and the alkaline addition is performed through a crystallization mother liquor recycle line.
4. The solid slag recycling method according to claim 1, wherein the temperature of the drying zone (A1) is controlled to be 140-220 ℃; the temperature of the pyrolysis zone (A2) is controlled to be 220-260 ℃; the temperature of the combustion area (A3) is controlled to be 360-480 ℃; the temperature of the burnout zone (A4) is controlled to be 380-460 ℃;
the flow ratio of the incineration ember rich in heavy metals to the alkali liquor is 1;
the temperature of the alkaline leaching is 30-120 ℃.
5. The solid slag recycling treatment device is characterized by comprising a multilayer combustion chamber (A), an alkaline leaching separation unit (B) and a crystallization separation unit (C);
the top of the multi-layer combustion chamber (A) is connected with a solid slag feeding pipeline, and a discharging pipeline at the bottom is sequentially connected with an alkaline leaching separation unit (B) and a crystallization separation unit (C); the multi-layer combustion chamber (A) is internally provided with a drying zone (A1), a pyrolysis zone (A2), a combustion zone (A3) and a burn-out zone (A4) from top to bottom in sequence, at least one layer of combustion chamber is arranged in each zone, each layer of combustion chamber is provided with a heating device and a temperature control device, and a material channel is arranged between every two adjacent combustion chambers;
the alkaline leaching separation unit (B) is provided with an alkaline liquor feeding pipeline and a solid product discharging pipeline, and the crystallization separation unit (C) is provided with a crystallization product discharging pipeline.
6. The solid slag recycling device of claim 5, wherein each layer of combustion chamber is provided with descending material channels at different positions, and the material channels are internally provided with mechanical transmission equipment with harrow teeth.
7. The solid slag recycling device according to claim 5, wherein 1-8 layers of combustion chambers are provided in each zone; the heating device is a burner/burner group; the temperature control device is a plurality of thermocouples which are symmetrically arranged.
8. The solid residue recycling device according to claim 5, wherein the crystallization separation unit (C) is provided with a crystallization mother liquor circulation line, and the crystallization mother liquor circulation line and the supplementary alkali liquor line are combined into the alkali liquor feeding line.
9. The solid slag recycling device according to claim 5, wherein the solid slag contains carbon and heavy metals, the heavy metals include one or both of nickel and vanadium, the solid product is a solid product rich in nickel hydroxide, and the crystallized product is a solid rich in vanadate.
10. The solid slag recycling device according to claim 5, wherein a flue gas exhaust line is provided at the top of the multi-layer combustion chamber.
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| CN202111154570.2A CN115872464A (en) | 2021-09-29 | 2021-09-29 | Solid slag recycling method and device |
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| CN202111154570.2A CN115872464A (en) | 2021-09-29 | 2021-09-29 | Solid slag recycling method and device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150153043A1 (en) * | 2012-07-24 | 2015-06-04 | Itea S.P.A. | Combustion process for fuel containing vanadium compounds |
| CN106989401A (en) * | 2017-04-26 | 2017-07-28 | 中国恩菲工程技术有限公司 | Incinerator apptss |
| CN107848832A (en) * | 2016-06-03 | 2018-03-27 | 昭和电工株式会社 | The manufacture method of the manufacture method of vfanadium compound, the manufacture method of vanadium solution and redox flow battery electrolyte |
| CN109631052A (en) * | 2019-01-18 | 2019-04-16 | 南昌市医疗废物处置中心有限公司 | A kind of steady and continuous pyrolytic incineration method of clinical waste |
-
2021
- 2021-09-29 CN CN202111154570.2A patent/CN115872464A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150153043A1 (en) * | 2012-07-24 | 2015-06-04 | Itea S.P.A. | Combustion process for fuel containing vanadium compounds |
| CN107848832A (en) * | 2016-06-03 | 2018-03-27 | 昭和电工株式会社 | The manufacture method of the manufacture method of vfanadium compound, the manufacture method of vanadium solution and redox flow battery electrolyte |
| CN106989401A (en) * | 2017-04-26 | 2017-07-28 | 中国恩菲工程技术有限公司 | Incinerator apptss |
| CN109631052A (en) * | 2019-01-18 | 2019-04-16 | 南昌市医疗废物处置中心有限公司 | A kind of steady and continuous pyrolytic incineration method of clinical waste |
Non-Patent Citations (1)
| Title |
|---|
| 王琪: "《工业固体废物处理及回收利用》", vol. 2006, 中国环境科学出版社, pages: 152 - 153 * |
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