CN112898999A - Catalytic pyrolysis-oxidation multi-stage furnace treatment integrated device and method for waste salt containing organic pollutants - Google Patents
Catalytic pyrolysis-oxidation multi-stage furnace treatment integrated device and method for waste salt containing organic pollutants Download PDFInfo
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- 150000003839 salts Chemical class 0.000 title claims abstract description 77
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- 239000002957 persistent organic pollutant Substances 0.000 title claims abstract description 28
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000000197 pyrolysis Methods 0.000 claims abstract description 56
- 230000003647 oxidation Effects 0.000 claims abstract description 42
- 239000007789 gas Substances 0.000 claims abstract description 32
- 238000002485 combustion reaction Methods 0.000 claims abstract description 30
- 238000011084 recovery Methods 0.000 claims abstract description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003546 flue gas Substances 0.000 claims abstract description 21
- 238000000746 purification Methods 0.000 claims abstract description 12
- 238000003763 carbonization Methods 0.000 claims description 27
- 238000001035 drying Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 16
- 239000003054 catalyst Substances 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
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- 239000006227 byproduct Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
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- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
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- 239000010703 silicon Substances 0.000 claims description 4
- 239000002918 waste heat Substances 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910021536 Zeolite Inorganic materials 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
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- Processing Of Solid Wastes (AREA)
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Abstract
The invention discloses a catalytic pyrolysis-oxidation multi-stage furnace treatment integrated device and method for waste salt containing organic pollutants, which is characterized by comprising the following steps of: a drying-catalytic pyrolysis-oxidation multi-stage system (B) of the main body part; and the main body part drying-catalytic pyrolysis-oxidation multi-section system (B) is respectively connected with an adjusting feeding system (A), a pyrolysis oxidation gas combustion system (C), a flue gas purification system (D) and a waste salt recovery system (E). The invention solves the bottleneck existing in the prior art, provides a technical means for treating waste salt containing organic pollutants or high-concentration wastewater and recovering high-quality resources, and has remarkable economic and social values.
Description
Technical Field
The invention relates to the technical field of waste salt treatment and resource utilization, in particular to a catalytic pyrolysis-oxidation multi-stage furnace treatment integrated device and method for waste salt containing organic pollutants.
Background
In the treatment process of high-concentration waste water and waste liquid in industries such as petroleum, chemical engineering and the like, waste salt can be derived or directly generated, the salt contains a large amount of organic pollutants, cannot be recycled, can only be treated as dangerous waste, has extremely high treatment cost, and causes huge economic pressure for enterprises. At present, the waste salt lacks a good disposal method and goes out of the way, and becomes a bottleneck limiting the development of enterprises. The treatment and resource utilization of waste salt or high-concentration high-salinity wastewater become the problems which are urgently needed to be solved by industrial enterprises.
Disclosure of Invention
The invention aims to solve the technical problem of providing a catalytic pyrolysis-oxidation multi-stage furnace treatment integrated device and method for organic pollutant-containing waste salt, solving the bottleneck of the prior art and providing a technical route for treatment and high-quality resource recovery for organic pollutant-containing waste salt or high-concentration wastewater treatment.
The technical problem to be solved by the invention is realized by the following technical scheme:
a catalytic pyrolysis-oxidation multi-stage furnace treatment integrated device containing organic pollutant waste salt comprises: a drying-catalytic pyrolysis-oxidation multi-stage system of the main body part; and the drying-catalytic pyrolysis-oxidation multi-section system of the main body part is respectively connected with a pyrolysis oxidation gas combustion system, a flue gas purification system and a waste salt recovery system of a regulating feeding system.
The adjusting and feeding system comprises an adjusting and feeding bin and a closed feeding bin connected with the adjusting and feeding bin.
The drying-catalytic pyrolysis-oxidation multi-section system comprises a drying section, a pyrolysis carbonization section and an anoxic oxidation section which are sequentially communicated with the closed feeding bin; the drying-catalytic pyrolysis-oxidation multi-section system is provided with a heating chamber and a heat distribution wall; the anoxic oxidation section is connected with the residue storage bin.
The pyrolysis oxidation gas combustion system comprises a pyrolysis liquid recovery and separation device and a combustible gas combustion chamber which are connected with the pyrolysis carbonization section; a water vapor cooling demisting device is connected with the heating chamber; the combustible gas combustion chamber is connected with the combustor and the combustion-supporting fan.
The flue gas purification system comprises a tail gas purification device and a chimney which are sequentially connected with the heating chamber.
The waste salt recovery system comprises a waste salt dissolving tank connected with the residue storage bin; the waste salt dissolving tank is sequentially connected with a solid-liquid separation system, an ultraviolet ozone deep oxidation system, an evaporative crystallization recovery system and a finished product bin.
The drying-catalytic pyrolysis-oxidation multi-section system forms multi-functional section equipment with drying, pyrolysis and carbonization and anoxic oxidation.
The heat distribution wall is respectively arranged below the drying section and the pyrolysis carbonization section in the heating chamber and is of a porous structure.
The combustion zone is positioned below the pyrolysis carbonization zone and the heat distribution wall and above the anoxic oxidation zone; the high-temperature flue gas of burning provides energy for pyrolysis carbonization section earlier, and the waste heat flue gas provides for upper portion drying section again. The anoxic oxidation section is positioned below the combustion zone.
The ultraviolet ozone oxidation system is an ultraviolet ozone advanced oxidation device with a tubular structure.
The invention also provides a catalytic pyrolysis-oxidation multi-stage furnace treatment integrated treatment method for waste salt containing organic pollutants, which comprises the following steps:
a. mixing waste salt and a catalyst in a material adjusting storage bin, conveying the mixture to a closed feeding bin for transition and sealing, and conveying the mixture to a drying-catalytic pyrolysis-oxidation multi-section system of a main body part;
b. conveying the waste salt in the step a to a drying section for drying and dehydration, directly entering a pyrolysis carbonization section for anaerobic thermal cracking after drying to remove organic pollutants, and then entering an anaerobic oxidation section for oxidizing and removing residual organic matters; the waste gas generated by the drying section and the combustible gas generated by the pyrolysis carbonization section and the anoxic oxidation section enter a gas combustion chamber for combustion treatment; the generated pyrolysis liquid enters a pyrolysis liquid recovery and separation device for recovery;
c. the waste gas, the combustible gas and the external supplementary energy in the step b are combusted in the combustion zone to generate high-temperature flue gas, the high-temperature flue gas provides heat for the pyrolysis carbonization section and the drying section through a heat distribution wall, and finally the waste heat flue gas is controlled at the temperature of 500-550 ℃ and enters a flue gas treatment system to be treated and discharged after reaching the standard;
d. b, directly dissolving the waste salt containing carbon residue generated in the step b in water to obtain a saturated solution, and separating and removing the solid residue carbon through a solid-liquid separation system;
e. and d, allowing the salt-containing saturated water separated in the step d to enter an ultraviolet ozone deep oxidation system to further oxidize and remove a small amount of residual organic matters, and finally allowing the salt-containing water to pass through an evaporative crystallization system to obtain a byproduct salt, wherein the TOC in the byproduct salt can reach below 200 mg/Kg.
The catalyst for catalytic pyrolysis is a granular calcium-based catalyst, such as calcium oxide and the like, and a silicon-based catalyst, such as a zeolite catalyst, granular quartz sand and the like.
The invention relates to a multi-stage furnace treatment integrated device for catalytic pyrolysis-oxidation of waste salt containing organic pollutants, which has the following technical effects:
the basic principle of the invention is that the waste salt is dried, dehydrated, catalyzed and pyrolyzed without oxygen and oxidized without oxygen to remove organic pollutants; carrying out carbon-water separation after the salt containing the carbon residue is dissolved; deeply oxidizing residual trace organic matters in the separated saturated salt solution by ozone advanced oxidation; then high-purity salt is recovered through evaporation and crystallization and is reused. The method solves the pain problems of incapability of resource utilization of the waste salt, generation of dangerous waste secondary pollution, high enterprise disposal cost and the like caused by organic pollutants, and provides a feasible method for enterprise development and waste salt resource utilization.
Drawings
FIG. 1 is a schematic view of the structure of the integrated device for catalytic pyrolysis-oxidation multi-stage furnace treatment of waste salt containing organic pollutants according to the present invention
Numbering in the figures: 1-adjusting a feeding bin; 2-sealing a feeding bin; 3-a drying section; 4-pyrolysis carbonization section; 5-anoxic oxidation section; 6-a residue storage bin; 7-pyrolysis liquid recovery and separation device; 8-a combustible gas combustion chamber; 9-a tail gas purification device; 10-a chimney; 11-a water vapor cooling demisting device; 12-a heating chamber; 13-heat distribution walls; 14-a waste salt dissolving tank; 15-a solid-liquid separation system; 16-ultraviolet ozone deep oxidation system; 17-evaporative crystallization recovery system; 18-finished product bin; 19-a burner; 20-combustion-supporting fan; 21-a blower; 22-combustion zone.
Detailed Description
The detailed description and specific embodiments of the present invention, which are presented in the figures and are not intended to limit the scope of the invention to the particular forms disclosed, but are instead provided as a full description. All other examples obtained without inventive step by a person skilled in the art are within the scope of the invention.
An organic pollutant-containing waste salt catalytic pyrolysis-oxidation multi-stage furnace treatment integrated device comprises: a drying-catalytic pyrolysis-oxidation multi-stage system B of the main body part; and the main body part drying-catalytic pyrolysis-oxidation multi-section system B is respectively connected with an adjusting feeding system A, a pyrolysis oxidation gas combustion system C, a flue gas purification system D and a waste salt recovery system E.
The adjusting feeding system A comprises an adjusting feeding bin 1 and a closed feeding bin 2 connected with the adjusting feeding bin 1;
the drying-catalytic pyrolysis-oxidation multi-section system B comprises a drying section 3, a pyrolysis carbonization section 4 and an anoxic oxidation section 5 which are sequentially communicated with the closed feeding bin 2; the heating chamber 12 is provided with a heat distribution wall 13; the anoxic oxidation section 5 is connected with a residue storage bin 6;
the pyrolysis oxidation gas combustion system C comprises a pyrolysis liquid recovery and separation device 7 and a combustible gas combustion chamber 8, wherein the pyrolysis liquid recovery and separation device 7 is connected with the pyrolysis carbonization section 4; a water vapor cooling demisting device 11 is connected with the heating chamber 12; the combustible gas combustion chamber 8 is connected with a combustor 19 and a combustion fan 20;
the flue gas purification system D comprises a tail gas purification device 9 and a chimney 10 which are sequentially connected with a heating chamber 12;
the waste salt recovery system E comprises a waste salt dissolving tank 14 connected with the residue storage bin 6; the waste salt dissolving tank 14 is sequentially connected with a solid-liquid separation system 15, an ultraviolet ozone deep oxidation system 16, an evaporative crystallization recovery system 17 and a finished product bin 18.
The process of the organic pollutant-containing waste salt catalytic pyrolysis-oxidation multi-stage furnace treatment integrated device comprises the following specific flows:
a. mixing waste salt and a catalyst in a material adjusting storage bin 1, conveying the mixture to a closed feeding bin 2 for storage and sealing, and conveying the mixture to a drying-catalytic pyrolysis-oxidation multi-section system B of a main body part;
b. and (b) conveying the waste salt in the step (a) to a drying section 3 for drying and dehydration, directly entering a pyrolysis and carbonization section 4 for anaerobic thermal cracking after drying to remove organic pollutants, and carrying out pyrolysis and carbonization on organic matters in the waste salt in a high-temperature anaerobic atmosphere to convert into pyrolysis gas and residue carbon.
And the waste salt after pyrolysis and carbonization enters an anoxic oxidation section 5, and organic matters which are not completely pyrolyzed in the waste salt and pyrolysis condensation components remained in the anoxic pyrolysis section are oxidized and removed. The pyrolysis catalyst is a granular calcium-based catalyst, such as calcium oxide, and the like, and a silicon-based catalyst, such as a zeolite catalyst, granular quartz sand, and the like.
After the waste salt containing carbon residue after pyrolysis and carbonization enters the anoxic oxidation section 5, part of air is blown in by the blower 21 to enable the material to contact with the air, the residual organic matters in the waste salt are oxidized and decomposed, and inorganic residues generated after oxidation are sent to the residue storage bin 6 after being cooled at the tail end of the anoxic oxidation section 5; the heat generated after oxidation directly provides heat for drying-pyrolysis in the heating chamber 12; the tail gas generated by the drying-catalytic pyrolysis-oxidation multi-section integrated system is purified by a tail gas purification device 9 and then is discharged out through a chimney 10 after reaching the standard.
The waste gas generated by drying in the drying section 3 is washed and demisted by the water vapor cooling demisting device 11, and then enters the combustible gas combustion chamber 8 to be combusted to generate high-temperature flue gas. Pyrolysis gas generated after the dry waste salt enters the pyrolysis chamber 4 for pyrolysis is introduced into the combustible gas combustion chamber 8, and the pyrolysis gas is combusted through the combustor 20 and the combustion fan 19 to generate high-temperature flue gas. Pyrolysis liquid generated in the pyrolysis carbonization section 4 enters a hydrolysate recovery and separation device 7 for recovery; the waste salt containing carbon residue generated in the pyrolysis carbonization section 4 enters the anoxic oxidation section 5 for oxidation.
c. The waste gas, the combustible gas and the external supplementary energy in the step b are combusted in the combustion area 22 to generate high-temperature flue gas, heat is provided for the pyrolysis carbonization section 4 and the drying section 5 through the heat distribution wall 13, and finally the waste heat flue gas is controlled at the temperature of 500-550 ℃ and enters the flue gas treatment system 9 to be treated and discharged after reaching the standard;
d. b, allowing waste salt containing carbon residue generated after pyrolysis in the step b to enter a salt recovery system, and allowing the waste salt containing carbon residue to enter a waste salt dissolving tank 14 through a storage bin to be dissolved to saturation; separating residue carbon generated in the pyrolysis process from a salt solution through a solid-liquid separation system 15;
e. and d, allowing the salt-containing saturated water separated in the step d to enter an ultraviolet ozone deep oxidation system 16, further oxidizing and removing a small amount of residual organic matters, and finally performing evaporation crystallization on the salt-containing water to obtain a byproduct salt, wherein the TOC in the byproduct salt can reach below 200 mg/Kg.
The technical scheme of the invention solves the bottleneck existing in the prior art, provides a technical means for treating waste salt containing organic pollutants or high-concentration wastewater and recovering high-quality resources, and has remarkable economic and social values.
Claims (9)
1. The utility model provides a catalytic pyrolysis-oxidation multistage furnace of organic pollutant waste salt handles integrated device which characterized in that includes: a drying-catalytic pyrolysis-oxidation multi-stage system (B) of the main body part; and the main body part drying-catalytic pyrolysis-oxidation multi-section system (B) is respectively connected with an adjusting feeding system (A), a pyrolysis oxidation gas combustion system (C), a flue gas purification system (D) and a waste salt recovery system (E).
2. The integrated catalytic pyrolysis-oxidation multi-stage furnace treatment device for waste salts containing organic pollutants according to claim 1, wherein the adjusting and feeding system (A) comprises an adjusting and feeding bin (1) and a closed feeding bin (2) connected with the adjusting and feeding bin (1);
the drying-catalytic pyrolysis-oxidation multi-section system (B) comprises a drying section (3), a pyrolysis carbonization section (4) and an anoxic oxidation section (5) which are sequentially communicated with the closed feeding bin (2); the heating chamber (12) is provided with a heat distribution wall (13); the anoxic oxidation section (5) is connected with a residue storage bin (6);
the pyrolysis oxidation gas combustion system (C) comprises a pyrolysis liquid recovery and separation device (7) and a combustible gas combustion chamber (8) which are connected with the pyrolysis carbonization section (4); a water vapor cooling demisting device (11) is connected with the heating chamber (12); the combustible gas combustion chamber (8) is connected with a combustor (19) and a combustion-supporting fan (20);
the flue gas purification system (D) comprises a tail gas purification device (9) and a chimney (10) which are sequentially connected with the heating chamber (12);
the waste salt recovery system (E) comprises a waste salt dissolving tank (14) connected with the residue storage bin (6); the waste salt dissolving tank (14) is sequentially connected with a solid-liquid separation system (15), an ultraviolet ozone deep oxidation system (16), an evaporation crystallization recovery system (17) and a finished product bin (18).
3. The integrated device for treating the catalytic pyrolysis-oxidation multi-stage furnace containing the organic pollutant waste salt according to claim 1 or 2, wherein the heat distribution wall (13) is respectively arranged below the drying section (3) and the pyrolysis carbonization section (4) in the heating chamber (12) and has a porous structure.
4. The integrated device for catalytic pyrolysis-oxidation multi-stage furnace treatment of waste salts containing organic pollutants according to claim 1, wherein the combustion zone (22) is located below the pyrolysis carbonization section (4) and the heat distribution wall (13) and above the anoxic oxidation section (5).
5. The integrated catalytic pyrolysis-oxidation multi-stage furnace treatment plant containing waste salts of organic pollutants according to claim 1, wherein the anoxic oxidation stage (5) is located below the combustion zone (22).
6. The integrated catalytic pyrolysis-oxidation multi-stage furnace treatment device for waste salts containing organic pollutants according to claim 2, wherein the ultraviolet ozone oxidation system (16) is an ultraviolet ozone advanced oxidation device with a tubular structure.
7. A catalytic pyrolysis-oxidation multi-stage furnace treatment integrated treatment method of waste salt containing organic pollutants according to claims 1 to 6, comprising the following steps:
a. mixing waste salt and a catalyst in a material adjusting storage bin (1), conveying the mixture to a closed feeding bin (2) for transition and sealing, and conveying the mixture to a drying-catalytic pyrolysis-oxidation multi-section system (B) of a main body part;
b. conveying the waste salt in the step a to a drying section (3) for drying and dehydration, directly entering a pyrolysis carbonization section (4) for anaerobic thermal cracking to remove organic pollutants after drying, and then entering an anaerobic oxidation section (5) for oxidizing and removing residual organic matters after pyrolysis carbonization; the waste gas generated by the drying section (3) and the combustible gas generated by the pyrolysis carbonization section (4) and the anoxic oxidation section (5) enter a gas combustion chamber (8) for combustion treatment; the generated pyrolysis liquid enters a pyrolysis liquid recovery and separation device (7) for recovery;
c. the waste gas, the combustible gas and the external supplementary energy in the step b are combusted in the combustion area (22), and the generated high-temperature flue gas provides heat for the pyrolysis carbonization section (4) and the drying section (5) through the heat distribution wall (13), and finally the waste heat flue gas is controlled at 500-550 ℃ and enters the flue gas treatment system (9) to be treated and discharged after reaching the standard;
d. after the waste salt containing carbon residue generated in the step b directly enters water to be dissolved into saturated solution, solid residue carbon is separated and removed through a solid-liquid separation system (15);
e. and d, allowing the salt-containing saturated water separated in the step d to enter an ultraviolet ozone deep oxidation system (16) to further oxidize and remove a small amount of residual organic matters, and finally, evaporating and crystallizing the salt-containing water to obtain a byproduct salt, wherein the TOC in the byproduct salt can reach below 200 mg/Kg.
8. The catalytic pyrolysis-oxidation multi-stage furnace treatment integrated process of waste salts containing organic pollutants as claimed in claim 7, wherein the pyrolysis catalyst is a granular calcium-based, silicon-based catalyst.
9. The catalytic pyrolysis-oxidation multi-stage furnace treatment integrated process of claim 8, wherein the particulate calcium base is calcium oxide; the silicon base is catalyzed into zeolite catalyst and particle quartz sand.
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| CN113623661A (en) * | 2021-07-07 | 2021-11-09 | 天津天一爱拓科技有限公司 | Catalytic pyrolysis system and method for treating waste salt |
| CN113828615A (en) * | 2021-09-06 | 2021-12-24 | 浙江宜可欧环保科技有限公司 | Novel waste salt treatment system |
| CN114307033A (en) * | 2021-12-21 | 2022-04-12 | 山东天力能源股份有限公司 | Waste salt drying and pyrolyzing system and method |
| CN115043416A (en) * | 2022-07-19 | 2022-09-13 | 西安交通大学 | Method and system for removing organic pollutants in sodium-based polluted salt |
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| CN113623661A (en) * | 2021-07-07 | 2021-11-09 | 天津天一爱拓科技有限公司 | Catalytic pyrolysis system and method for treating waste salt |
| CN113623661B (en) * | 2021-07-07 | 2024-06-07 | 天津天一爱拓科技有限公司 | Catalytic pyrolysis system and method for treating waste salt |
| CN113828615A (en) * | 2021-09-06 | 2021-12-24 | 浙江宜可欧环保科技有限公司 | Novel waste salt treatment system |
| CN114307033A (en) * | 2021-12-21 | 2022-04-12 | 山东天力能源股份有限公司 | Waste salt drying and pyrolyzing system and method |
| CN114307033B (en) * | 2021-12-21 | 2022-12-02 | 山东天力能源股份有限公司 | Waste salt drying and pyrolysis system and method |
| CN115043416A (en) * | 2022-07-19 | 2022-09-13 | 西安交通大学 | Method and system for removing organic pollutants in sodium-based polluted salt |
| CN115043416B (en) * | 2022-07-19 | 2023-07-11 | 西安交通大学 | Method and system for removing organic pollutants in sodium-based polluted salt |
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