CN110548748A - Collaborative melting treatment method for waste SCR flue gas denitration catalyst and fly ash - Google Patents
Collaborative melting treatment method for waste SCR flue gas denitration catalyst and fly ash Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 73
- 239000010881 fly ash Substances 0.000 title claims abstract description 57
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- 239000003546 flue gas Substances 0.000 title claims abstract description 49
- 238000002844 melting Methods 0.000 title claims abstract description 45
- 230000008018 melting Effects 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 12
- 239000000654 additive Substances 0.000 claims abstract description 10
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- 238000001035 drying Methods 0.000 claims abstract description 5
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- 238000012216 screening Methods 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims description 12
- 238000002386 leaching Methods 0.000 claims description 11
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- 239000000292 calcium oxide Substances 0.000 claims description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 9
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 8
- 239000010813 municipal solid waste Substances 0.000 claims description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 5
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 5
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 claims description 4
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 3
- 238000003181 co-melting Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000006004 Quartz sand Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000006063 cullet Substances 0.000 claims description 2
- 238000009776 industrial production Methods 0.000 claims description 2
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- 239000011521 glass Substances 0.000 abstract description 7
- 230000002195 synergetic effect Effects 0.000 abstract description 5
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- 239000002920 hazardous waste Substances 0.000 description 5
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- 238000011069 regeneration method Methods 0.000 description 5
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- 230000008023 solidification Effects 0.000 description 5
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- 229910052720 vanadium Inorganic materials 0.000 description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
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- 231100000167 toxic agent Toxicity 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
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- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
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- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000783 metal toxicity Toxicity 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
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- 229910052719 titanium Inorganic materials 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/02—Gases or liquids enclosed in discarded articles, e.g. aerosol cans or cooling systems of refrigerators
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a collaborative melting treatment method of waste SCR flue gas denitration catalyst and fly ash, which comprises the following steps: carrying out pretreatment such as crushing, drying, screening and the like on the waste SCR flue gas denitration catalyst to obtain waste catalyst powder with uniform particle size; uniformly mixing the treated waste SCR flue gas denitration catalyst and fly ash according to a certain proportion, and adding an additive to obtain a waste catalyst-fly ash mixture; conveying the catalyst-fly ash mixture to a high-temperature melting device for melting treatment to obtain a high-temperature melt; and rapidly cooling the high-temperature melt to obtain vitreous slag. According to the invention, the waste SCR flue gas denitration catalyst and the fly ash are subjected to synergistic melting treatment, so that the heavy metal in the waste denitration catalyst is effectively fixed, the concept of 'treatment of waste by waste and synergistic treatment' is met, the obtained glass slag can be used as a resource product, and the harmless, economical and resource treatment of dangerous solid waste is realized.
Description
Technical Field
the invention relates to the technical field of dangerous solid waste treatment, in particular to a collaborative melting treatment method of a waste SCR flue gas denitration catalyst and fly ash.
Background
Selective Catalytic Reduction (SCR) denitration technology is mainstream flue gas denitration technology in the current stage of coal-fired power plants in China and accounts for more than 90% of flue gas denitration markets. As an important component influencing the integral denitration efficiency of an SCR system, the denitration catalyst can be deactivated in practical application due to the problems of fly ash abrasion, catalyst blockage and scaling, catalyst poisoning, high-temperature thermal sintering and the like, and finally becomes a waste catalyst.
In 2014, the environmental protection department issued "notice on monitoring work of strengthening waste flue gas denitration catalyst", brought the management, regeneration and utilization of waste flue gas denitration catalyst into hazardous waste management, and categorized the waste flue gas denitration catalyst into "HW 50 waste catalyst" in "national hazardous waste list (revised 2016.)", the waste SCR flue gas denitration catalyst itself contains heavy metals such as titanium, vanadium and tungsten, and has certain toxicity, wherein V 2 O 5 is further qualified as B-level inorganic highly toxic substance, and in the reaction process, the highly toxic substance such as arsenic, mercury and chromium in flue gas can cause secondary pollution to the catalyst, and if not properly disposed, can cause great harm to environmental resources and human health.
At present, the treatment modes of the waste SCR flue gas denitration catalyst at home and abroad mainly comprise regeneration treatment, land landfill and metal recovery. The invention patent CN 106311218A discloses a vanadium-based SCR catalyst regeneration catalyst powder and a preparation method thereof, but the catalyst regeneration times are limited, the catalyst activity can not be completely recovered after regeneration, and finally the catalyst becomes a waste catalyst because the denitration requirement can not be met. The invention patent CN 104926235A provides a treatment and solidification method before landfill of a waste SCR denitration catalyst, but land landfill wastes land resources and does not meet the sustainable development requirement. The invention patent CN 106164304A provides a method for recovering vanadium and tungsten from denitration waste catalyst, but the method can generate more waste liquid in the treatment process to cause secondary pollution, and the treatment cost is higher, so that the industrial scale is difficult to form.
in addition, the invention patent CN 105907950A provides a metallurgical sintering treatment method for a waste SCR flue gas denitration catalyst, which mixes and sinters the waste catalyst and metallurgical raw materials to form compact sintered ore and reduce leaching of heavy metals, but because the content of glass forming agents such as SiO 2, CaO and the like in the waste catalyst is low, a network-structured vitreous body is not formed in the sintered body, the solidification effect of the heavy metals can be weakened with time, and the heavy metals can escape into the environment to cause pollution.
the high-temperature melting and solidifying treatment technology has obvious advantages in the aspects of weight reduction, volume reduction, inorganic pollutant digestion, stable solidification of heavy metal, treatment period and the like, and the formed slag can effectively seal the heavy metal in a compact glass network, so that the leaching risk of dangerous waste heavy metal is reduced. At present, the method is widely applied to harmless treatment of solid wastes such as garbage fly ash and sludge, as shown in patent CN 109734307A, CN 108036334A, CN 107055588A and the like.
Disclosure of Invention
in view of the remarkable advantages of the high-temperature melting and solidifying treatment technology, the invention aims to provide a harmless melting treatment method of the waste SCR flue gas denitration catalyst, which carries out cooperative melting treatment on the waste SCR flue gas denitration catalyst and fly ash, on one hand, a higher-content glass forming agent in the fly ash provides guarantee for forming a Si-O glass network for the co-melting of the two, thereby effectively inhibiting the leaching of heavy metals, and on the other hand, the main component TiO 2 in the waste SCR flue gas denitration catalyst can be used as a nucleating agent to promote the glass melting and crystallization processes in the cooperative treatment process.
In order to achieve the purpose, the invention adopts the technical scheme that a method for cooperatively melting and disposing waste SCR (selective catalytic reduction) flue gas denitration catalyst and fly ash is provided, and comprises the following steps:
Step 1: taking the waste SCR flue gas denitration catalyst down from the denitration device module, and carrying out pretreatment such as crushing, drying, screening and the like to obtain waste catalyst powder with uniform particle size;
Step 2: uniformly mixing the pretreated waste SCR flue gas denitration catalyst and fly ash according to a certain proportion, and adding an additive to obtain a waste catalyst-fly ash mixture;
And step 3: conveying the catalyst-fly ash mixture obtained in the step 2 to a high-temperature melting device for melting treatment to obtain a high-temperature melt;
And 4, step 4: and (4) rapidly cooling the high-temperature melt in the step (3) to obtain vitreous slag.
In the step 1, the particle size of the powder after crushing and grinding the waste SCR flue gas denitration catalyst is less than 150 microns, and the mass percentage of the main chemical components of the powder is 60-75% of TiO 2, 1-15% of SiO 2, 1-5% of V 2 O 5, 0.1-10% of Al 2 O 3, 0.1-10% of SO 3, 0.1-5% of CaO, 0.1-5% of MoO 3, 0.1-5% of P 2 O 3, 0.1-5% of K 2 O, 0.1-5% of Na 2 O and 0.1-5% of MgO.
Furthermore, the mass percentages of the main heavy metal chemical components of the waste SCR flue gas denitration catalyst are 0-0.1% of ZnO, 0-0.1% of PbO, 0-0.1% of As 2 O 3, 0-0.1% of MnO, 0-0.1% of SrO, 0-0.1% of NiO and 0-0.1% of Nb 2 O 5.
The fly ash in the step 2 is one or more of household garbage incineration fly ash, medical garbage incineration fly ash and industrial production fly ash.
The additive in the step 2 is one or more of cullet, quartz sand, analytically pure silica and analytically pure calcium oxide, and the additive is used for adjusting the alkalinity of the waste SCR catalyst-fly ash mixture so as to reduce the melting point of the eutectic and promote the melting vitrification process.
The dosage of the additive is determined according to the chemical composition of the waste SCR catalyst-fly ash mixture, and finally the requirements of the waste SCR catalyst-fly ash mixture on the mass percentage of chemical components and the calcium-silicon ratio can be met.
The mass percentages of the chemical components of the waste catalyst-fly ash mixture in the step 2 meet the following requirements that 25-40% of SiO 2, 25-40% of CaO, 5-10% of Al 2 O 3, 1-10% of TiO 2, 1-5% of Fe 2 O 3, and the calcium-silicon ratio (CaO/SiO 2) is controlled to be 0.6-1.6.
The mass percentages of the chemical components are in a low-temperature melting region in a CaO-SiO 2 -Al 2 O 3 ternary melting system phase diagram, the waste SCR denitration catalyst, fly ash and additives are mixed according to the theory, the components of the mixture are controlled in the preferable proportion range, the melting temperature of the mixture can be remarkably reduced, and the energy consumption of the treatment process is reduced.
The heating temperature of the high-temperature melting device for melting treatment in the step 3 is 1200-1500 ℃, and the time of melting treatment by the high-temperature melting device is more than 60 minutes.
And in the high-temperature melt rapid cooling process in the step 4, the cooling rate is not lower than 200 ℃/min. And quickly cooling the high-temperature melt to obtain the vitreous slag.
The vitreous slag obtained in the step 4 can effectively fix heavy metals, and the leaching concentration of each heavy metal in the vitreous slag is as follows: zn is less than 0.5mg/L, V is less than 0.5mg/L, Mn is less than 0.1mg/L, Cr is less than 0.1mg/L, Cu is less than 0.01mg/L, Pb is less than 0.01mg/L, As is less than 0.005mg/L, Se is less than 0.005mg/L, and the concentration limit value is far lower than the concentration limit value specified in the Standard for identifying hazardous waste leach toxicity identification (GB 5085.3-2007).
After the waste catalyst and fly ash mixture is subjected to high-temperature melting treatment, the mixture is rapidly cooled to form compact vitreous slag, so that heavy metals can be effectively fixed in a vitreous body, and leaching of the heavy metals is reduced. Experiments prove that the leaching concentration of each heavy metal of the vitreous slag is far lower than the concentration limit value specified in hazardous waste identification standard leaching toxicity identification (GB 5085.3-2007).
Compared with the prior art, the method for treating the waste SCR flue gas denitration catalyst and fly ash by the synergistic melting has the following beneficial effects:
1) According to the invention, the waste SCR flue gas denitration catalyst and fly ash are subjected to a synergistic melting treatment method, and the heavy metals of two wastes are effectively solidified by utilizing the high glass forming agent content of fly ash and the glass body formed in the high-temperature melting process of the waste denitration catalyst and fly ash mixture, so that the problem of incomplete solidification of the heavy metals in the sintering process of the waste SCR flue gas denitration catalyst is solved, the concept of 'treatment of wastes by wastes and synergistic treatment' is met, and a new way is provided for the harmless treatment of the waste SCR flue gas denitration catalyst.
2) according to the invention, the proper additive is added into the waste SCR flue gas denitration catalyst-fly ash mixture, so that the melting point of the mixture is reduced, the energy consumption in the high-temperature melting process is reduced on the premise of meeting the heavy metal solidification requirement, and the treatment cost is reduced.
3) The vitreous body slag finally obtained by the invention can be further processed to obtain resource products such as ceramic glass, building materials and the like, and the resource utilization of solid wastes is realized.
Drawings
Fig. 1 is a process flow diagram of a co-melting treatment method of a waste SCR flue gas denitration catalyst and fly ash according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to fig. 1, but the present invention should not be construed as being limited to the scope of the present invention.
In this embodiment, the process of the collaborative melting treatment of the waste SCR flue gas denitration catalyst and the fly ash is as follows:
Step 1: taking the waste SCR flue gas denitration catalyst down from the denitration device module, crushing and grinding the waste catalyst by adopting grinding equipment, drying the waste catalyst in a drying oven for 12 hours, and screening to obtain waste catalyst powder with the particle size smaller than 150 microns and uniform size.
In this example, the chemical components of the used waste SCR flue gas denitration catalyst powder are shown in table 1.
TABLE 1 chemical composition of waste SCR flue gas denitration catalyst powder
Step 2, uniformly mixing the waste denitration catalyst powder obtained in the step 1 and the household garbage incineration fly ash in a mass ratio of 1:9, adding 10 wt.% of waste glass as an additive to adjust the alkalinity of the waste catalyst-fly ash mixture, and finally obtaining the waste catalyst-fly ash mixture, wherein the chemical components of the waste catalyst-fly ash mixture are shown in table 2, and the calcium-silicon ratio (CaO/SiO 2) is 1.04.
TABLE 2 chemical composition of spent catalyst-fly ash mixture
The waste catalyst-fly ash mixture is conveyed into a high-temperature electric furnace, the heating temperature of the electric furnace is set to 1350 ℃, and the mixture is heated in the furnace for 1 hour.
Discharging the melt formed by high-temperature melting from a slag discharge port of the electric furnace, and quenching by water to obtain the vitrified slag.
According to the "hazardous waste identification standard leaching toxicity identification" (GB 5085.3-2007), the obtained vitrified slag was subjected to a leaching experiment, and the concentration of the heavy metal leachate of the vitrified slag was detected by inductively coupled plasma mass spectrometry (ICP-MS), as shown in table 3.
TABLE 3 heavy metal toxicity leaching test results and Standard limits for vitrified slag
The above description is only exemplary of the preferred embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for cooperatively melting and disposing waste SCR (selective catalytic reduction) flue gas denitration catalyst and fly ash is characterized by comprising the following steps of:
Step 1: taking the waste SCR flue gas denitration catalyst down from the denitration device module, and crushing, drying and screening the waste SCR flue gas denitration catalyst to obtain waste catalyst powder with uniform particle size;
step 2: uniformly mixing the waste catalyst powder obtained in the step 1 with fly ash according to a certain example, and adding an additive to obtain a waste catalyst-fly ash mixture;
And step 3: conveying the catalyst-fly ash mixture obtained in the step 2 to a high-temperature melting device for melting treatment to obtain a high-temperature melt;
And 4, step 4: and (4) rapidly cooling the high-temperature melt in the step (3) to obtain vitreous slag.
2. the method for the cooperative melting treatment of the waste SCR flue gas denitration catalyst and the fly ash according to claim 1, wherein in the step 1, the particle size of the powder of the crushed and ground waste SCR flue gas denitration catalyst is less than 150 μm.
3. The method for the cooperative melting treatment of the waste SCR flue gas denitration catalyst and the fly ash according to claim 2, wherein in the step 1, the main chemical components of the waste SCR flue gas denitration catalyst comprise, by mass, 60-75% of TiO 2, 1-15% of SiO 2, 1-5% of V 2 O 5, 0.1-10% of Al 2 O 3, 0.1-10% of SO 3, 0.1-5% of CaO, 0.1-5% of MoO 3, 0.1-5% of P 2 O 3, 0.1-5% of K 2 O, 0.1-5% of Na 2 O, and 0.1-5% of MgO.
4. The method for the cooperative melting treatment of the waste SCR flue gas denitration catalyst and the fly ash according to claim 3, wherein in the step 1, the chemical components of the main heavy metals of the waste SCR flue gas denitration catalyst comprise, by mass, 0-0.1% of ZnO, 0-0.1% of PbO, 0-0.1% of As 2 O 3, 0-0.1% of MnO, 0-0.1% of SrO, 0-0.1% of NiO, and 0-0.1% of Nb 2 O 5.
5. The method for the cooperative melting treatment of the denitration catalyst and the fly ash of the waste SCR flue gas as claimed in claim 1, wherein in the step 2, the fly ash is one or more of household garbage incineration fly ash, medical garbage incineration fly ash and industrial production fly ash.
6. The method for the cooperative melting disposal of the waste SCR flue gas denitration catalyst and the fly ash according to claim 1, wherein in the step 2, the additive is one or more of cullet, quartz sand, analytically pure silica, analytically pure calcium oxide.
7. The method for the cooperative melting treatment of the waste SCR flue gas denitration catalyst and the fly ash according to claim 6, wherein the waste catalyst-fly ash mixture obtained in the step 2 comprises, by mass, 30-40% of SiO 2, 15-25% of CaO, 5-10% of Al 2 O 3, 1-10% of TiO 2, 1-5% of Fe 2 O 3, and the calcium-silicon ratio is controlled to be 0.6-1.5.
8. The method for co-melting and disposing the waste SCR flue gas denitration catalyst and the fly ash according to claim 7, wherein in the step 3, the heating temperature of the high-temperature melting device for melting is 1200-1500 ℃, and the time of melting by the high-temperature melting device is more than 60 minutes.
9. the method for the cooperative melting treatment of the waste SCR flue gas denitration catalyst and the fly ash according to claim 8, wherein in the rapid cooling process of the high-temperature melt in the step 4, the cooling rate is not lower than 200 ℃/min.
10. the method for the cooperative melting treatment of the denitration catalyst and the fly ash in the waste SCR flue gas according to claim 9, wherein the vitreous slag obtained in the step 4 can effectively fix heavy metals, and the leaching concentration of each heavy metal in the vitreous slag is as follows: zn <0.5mg/L, V <0.5mg/L, Mn <0.1mg/L, Cr <0.1mg/L, Cu <0.01mg/L, Pb <0.01mg/L, As <0.005mg/L, Se <0.005 mg/L.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111499351A (en) * | 2020-05-06 | 2020-08-07 | 龙净科杰环保技术（上海）有限公司 | Method for preparing porous purification stone by using residual sludge of cleaning waste SCR catalyst |
| CN111841528A (en) * | 2020-07-22 | 2020-10-30 | 湖北中油优艺环保科技有限公司 | Hazardous waste incineration denitration catalyst and preparation method thereof |
| CN111889487A (en) * | 2020-08-03 | 2020-11-06 | 天津大学 | Method for solidifying heavy metal by plasma fusion through multi-source solid waste synergistic treatment |
| CN112725052A (en) * | 2020-11-06 | 2021-04-30 | 苏州西热节能环保技术有限公司 | Resource utilization method of waste SCR denitration catalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113351612A (en) * | 2020-03-05 | 2021-09-07 | 北京中科国润环保科技有限公司 | System and method for treating fly ash by water washing and desalting combined with high-temperature melting |
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| CN111499351B (en) * | 2020-05-06 | 2022-05-20 | 龙净科杰环保技术（上海）有限公司 | Method for preparing porous purification stone by using excess sludge of cleaning waste SCR catalyst |
| CN111841528A (en) * | 2020-07-22 | 2020-10-30 | 湖北中油优艺环保科技有限公司 | Hazardous waste incineration denitration catalyst and preparation method thereof |
| CN111841528B (en) * | 2020-07-22 | 2023-07-14 | 湖北中油优艺环保科技有限公司 | Dangerous waste incineration denitration catalyst and preparation method thereof |
| CN111889487A (en) * | 2020-08-03 | 2020-11-06 | 天津大学 | Method for solidifying heavy metal by plasma fusion through multi-source solid waste synergistic treatment |
| CN112725052A (en) * | 2020-11-06 | 2021-04-30 | 苏州西热节能环保技术有限公司 | Resource utilization method of waste SCR denitration catalyst |
| CN113278818A (en) * | 2021-04-27 | 2021-08-20 | 中国瑞林工程技术股份有限公司 | Treatment method of nickel-calcium slag |
| CN114713592A (en) * | 2022-03-31 | 2022-07-08 | 天津华能杨柳青热电有限责任公司 | Device and method for preparing mineral wool by utilizing waste ash of waste incineration power plant |
| CN114713592B (en) * | 2022-03-31 | 2023-06-27 | 天津华能杨柳青热电有限责任公司 | Device and method for preparing mineral cotton by utilizing waste ash residues of waste incineration power plant |
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