CN108998670A - Thick titanium valve device and method thereof are extracted in SCR catalyst - Google Patents
Thick titanium valve device and method thereof are extracted in SCR catalyst Download PDFInfo
- Publication number
- CN108998670A CN108998670A CN201810730701.9A CN201810730701A CN108998670A CN 108998670 A CN108998670 A CN 108998670A CN 201810730701 A CN201810730701 A CN 201810730701A CN 108998670 A CN108998670 A CN 108998670A
- Authority
- CN
- China
- Prior art keywords
- reaction kettle
- scr catalyst
- pulverizer
- communicated
- rinsing area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/009—General processes for recovering metals or metallic compounds from spent catalysts
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1236—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by wet processes, e.g. by leaching
- C22B34/1254—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by wet processes, e.g. by leaching using basic solutions or liquors
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/008—Wet processes by an alkaline or ammoniacal leaching
-
- 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
Abstract
The invention discloses thick titanium valve equipment is extracted in SCR catalyst, including pulverizer and Rinsing Area, the pulverizer top is provided with feeding inlet, the pulverization roller by motor drive is arranged in pairs inside the pulverizer, the crushing motor spindle is communicated with discharge bucket, the crushing motor spindle is fixed with reaction kettle by connecting rod, and reaction kettle upper end middle position corresponds to discharge bucket and is communicated with feed hopper, one upper lateral part of reaction kettle is also communicated with charging line, rabbling mechanism is installed inside the reaction kettle, discarded SCR catalyst is first placed in Rinsing Area by the present invention, and having heaters and ultrasonic oscillation device is respectively set in bottom and outer bottom in Rinsing Area, and Rinsing Area top is provided with the high temperature nozzle being connected to air compressor gas vent, to which discarded SCR catalyst be purged, the pre-processing process of washing；Again by moist discarded SCR catalyst investment pulverizer, pulverization process is carried out by the pulverization roller in pulverizer.
Description
Technical field
The invention belongs to thick titanium valve equipment technical field is extracted in SCR catalyst, and in particular to extract in SCR catalyst thick
Titanium valve equipment, the invention further relates to the application methods that thick titanium valve equipment is extracted in SCR catalyst.
Background technique
SCR catalyst, which refers to, to be applied in power plant SCR(selective catalytic reduction) on denitrating system
Catalyst (Catalyst), SCR denitration service life available on the market is limited, is just faced with and is dropped after failure
Problem, but contain the oxides such as thick titanium valve and a small amount of vanadium, tungsten in discarded denitrating catalyst, there is very high recycling valence
Value carries out recycling and extracts thick titanium valve, but thick titanium valve extraction effect is unsatisfactory in the prior art, and extraction efficiency is not
Height, thus also improvement is needed to handle.
Summary of the invention
The purpose of the present invention is to provide thick titanium valve device and method thereof are extracted in SCR catalyst, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the invention provides the following technical scheme: extracting thick titanium valve equipment in SCR catalyst, including
Pulverizer and Rinsing Area, the pulverizer top are provided with feeding inlet, have been arranged in pairs inside the pulverizer and have passed through motor
The pulverization roller of driving, the crushing motor spindle are communicated with discharge bucket, and the crushing motor spindle is fixed with reaction kettle by connecting rod, and
Reaction kettle upper end middle position corresponds to discharge bucket and is communicated with feed hopper, and one upper lateral part of reaction kettle is also communicated with liquid-feeding tube
Road is equipped with rabbling mechanism inside the reaction kettle, and reaction kettle outer wall side is provided with for clean open slot, described
Activity is connected with hermatic door in open slot, and heating tube is also equipped with inside the reaction kettle, and the reaction kettle outer wall, which also passes through, leads
Line is connected with temperature detect switch (TDS), and the temperature detect switch (TDS) is connected with external electric socket grafting, and the reactor bottom side also connects
It is connected with drainage line, the drainage line end is communicated with cooler bin, the suction for conveying is also communicated in the drainage line
Material pumps, and is provided with semiconductor cooler in the cooler bin, and the cooler bin bottom side also passes through pipeline and is communicated with sheet frame
Filter press.
Preferably, having heaters and ultrasonic oscillation device is respectively set in bottom and outer bottom in the Rinsing Area, and described
Rinsing Area top is provided with high temperature nozzle, and the high temperature nozzle end is connected with air compressor.
Preferably, the hermatic door is connect by setting fastening bolt at equal intervals with reaction kettle outer wall side, described close
The closure door circle of outer wall one is also adhered the gasket for being covered with and being bonded with the inner wall of the open slot.
Preferably, the rabbling mechanism includes that servo motor, stirring main shaft and stirring branch, the stirring main shaft are connected to
The output end of servo motor, the stirring main shaft are connected to reaction kettle by bearing and extend to inside it, the stirring branch
It is fixed in stirring main shaft at equal intervals inside reaction kettle and through bolt.
The present invention also provides the application methods that thick titanium valve equipment is extracted in SCR catalyst, specifically includes the following steps:
S1, first discarded SCR catalyst is placed in Rinsing Area, and in Rinsing Area bottom and outer bottom be respectively set having heaters and
Ultrasonic oscillation device, and Rinsing Area top is provided with the high temperature nozzle being connected to air compressor gas vent, thus by discarded SCR
The pre-processing process that catalyst is purged, washed；
S2, again by moist discarded SCR catalyst investment pulverizer, carry out pulverization process by the pulverization roller in pulverizer；
S3, smashed slurries are put by reaction kettle by the setting of pulverizer bottom discharge bucket and reaction kettle upper feed hopper
It is interior, quantitative sodium hydroxide solution is put by charging line, herein the amount ratio of sodium hydroxide solution and discarded SCR catalyst
For 1:5, by being arranged by the temperature control in reaction kettle between 86 degree to 90 degree for heating tube and temperature detect switch (TDS), when stirring
Length is set as 9 hours；
S4, stirring are completed, and the solvent after stirring is sucked cooler bin by charging absorption pump, will be stirred to react by semiconductor cooler
Solvent afterwards carries out cooling treatment, so that solvent cures；
S5, the solvent after cooling treatment is carried out by filters pressing by plate and frame filter press, to obtain thick titanium valve and filtrate.
Thick titanium valve device and method thereof are extracted in SCR catalyst provided by the invention, the present invention is first by discarded SCR catalyst
It is placed in Rinsing Area, and having heaters and ultrasonic oscillation device is respectively set in bottom and outer bottom in Rinsing Area, and on Rinsing Area
Portion is provided with the high temperature nozzle being connected to air compressor gas vent, thus discarded SCR catalyst is purged, wash it is pre-
First treatment process；Again by moist discarded SCR catalyst investment pulverizer, carried out at crushing by the pulverization roller in pulverizer
Reason；Smashed slurries are put into reaction kettle by the setting of pulverizer bottom discharge bucket and reaction kettle upper feed hopper again,
Quantitative sodium hydroxide solution is put by charging line, it can be by smashed SCR catalyst and hydrogen-oxygen by rabbling mechanism
Change sodium solution be sufficiently mixed, cleaning reaction kettle can be easy to open by the setting of hermatic door and gasket, be also convenient for into
Row maintenance replacement stirring branch；Stirring is completed, and the solvent after stirring is sucked cooler bin by charging absorption pump, passes through semiconductor refrigerating
Solvent after device will be stirred to react carries out cooling treatment, so that solvent cures；It will be molten after cooling treatment by plate and frame filter press
Agent carries out filters pressing, to obtain thick titanium valve and filtrate.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is Rinsing Area component structure diagram of the invention；
Fig. 3 is cooling tank assembly structural schematic diagram of the invention；
Fig. 4 is pulverizer and reaction kettle connection relationship structural schematic diagram of the invention.
In figure: 1 pulverizer, 2 feeding inlets, 3 pulverization rollers, 4 discharge buckets, 5 air compressors, 6 reaction kettles, 7 feed hoppers, 8 add
Liquid pipe road, 9 rabbling mechanisms, 91 servo motors, 92 stirring main shafts, 93 stirring branches, 10 open slots, 11 hermatic doors, 12 heating tubes,
13 temperature detect switch (TDS)s, 14 drainage lines, 15 cooler bins, 16 charging absorption pumps, 17 semiconductor coolers, 18 plate and frame filter press, 19 Rinsing Areas,
20 heaters, 21 ultrasonic oscillation devices, 22 high temperature nozzles, 23 gaskets.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides extracting thick titanium valve equipment, including pulverizer 1 and Rinsing Area 19 in SCR catalyst picture 1-4,
1 top of pulverizer is provided with feeding inlet 2, and the pulverization roller by motor drive is arranged in pairs inside the pulverizer 1
3,1 bottom of pulverizer is communicated with discharge bucket 4, and 1 bottom of pulverizer is fixed with reaction kettle 6 by connecting rod, and described anti-
It answers 6 upper end middle position of kettle to correspond to discharge bucket 4 and is communicated with feed hopper 7,6 one upper lateral part of reaction kettle is also communicated with charging line
8, rabbling mechanism 9 is installed inside the reaction kettle 6, the 6 outer wall side of reaction kettle is provided with for clean open slot 10,
Activity is connected with hermatic door 11 in the open slot 10, and heating tube 12, the reaction kettle 6 are also equipped with inside the reaction kettle 6
Outer wall also passes through conducting wire and is connected with temperature detect switch (TDS) 13, and the temperature detect switch (TDS) 13 is connected with external electric socket grafting, described anti-
6 bottom side of kettle is answered also to be communicated with drainage line 14,14 end of drainage line is communicated with cooler bin 15, the drainage line
It is also communicated with the charging absorption pump 16 for conveying on 14, semiconductor cooler 17, and the cooling are provided in the cooler bin 15
15 bottom side of case also passes through pipeline and is communicated with plate and frame filter press 18.
Specifically, having heaters 20 and ultrasonic oscillation device 21 is respectively set in bottom and outer bottom in the Rinsing Area 19,
And 19 top of Rinsing Area is provided with high temperature nozzle 22,22 end of high temperature nozzle is connected with air compressor 5.
Specifically, the hermatic door 11 is connect by setting fastening bolt at equal intervals with 6 outer wall side of reaction kettle, described in
11 outer wall one of hermatic door circle is also adhered the gasket 23 for being covered with and being bonded with 10 inner wall of open slot.
Specifically, the rabbling mechanism 9 includes servo motor 91, stirring main shaft 92 and stirring branch 93, the stirring master
Axis 92 is connected to the output end of servo motor 91, and the stirring main shaft 92 is connected to reaction kettle 6 by bearing and extends in it
Portion, the stirring branch 93 are located at 6 inside of reaction kettle and are fixed in stirring main shaft 92 at equal intervals by bolt.
The present invention also provides the application methods that thick titanium valve equipment is extracted in SCR catalyst, specifically includes the following steps:
S1, first discarded SCR catalyst is placed in Rinsing Area 19, and bottom and outer bottom are respectively arranged with heating in Rinsing Area 19
Device 20 and ultrasonic oscillation device 21, and 19 top of Rinsing Area is provided with the high temperature nozzle 22 being connected to 5 gas vent of air compressor,
Pre-processing process to be purged, be washed by discarded SCR catalyst；
S2, again by moist discarded SCR catalyst investment pulverizer 1, carried out at crushing by the pulverization roller 3 in pulverizer 1
Reason；
S3, smashed slurries are put by the setting of 6 upper feed hopper 7 of 1 bottom discharge bucket 4 of pulverizer and reaction kettle and are reacted
In kettle 6, quantitative sodium hydroxide solution is put by charging line 8, herein sodium hydroxide solution and discarded SCR catalyst
Amount than being 1:5, by the setting of heating tube 12 and temperature detect switch (TDS) 13 by the temperature control in reaction kettle 6 86 degree to 90 degree it
Between, stirring duration is set as 9 hours；
S4, stirring are completed, and the solvent after stirring is sucked cooler bin 15 by charging absorption pump, will be stirred by semiconductor cooler 17
Solvent after reaction carries out cooling treatment, so that solvent cures；
S5, the solvent after cooling treatment is carried out by filters pressing by plate and frame filter press 18, to obtain thick titanium valve and filtrate.
In conclusion compared with prior art, discarded SCR catalyst is first placed in Rinsing Area 19 by the present invention, and clear water
Having heaters 20 and ultrasonic oscillation device 21 is respectively set in bottom and outer bottom in slot 19, and 19 top of Rinsing Area is provided with and sky
The high temperature nozzle 22 of 5 gas vent of air compressor connection, thus the pre-processing work that discarded SCR catalyst is purged, is washed
Sequence；Again by moist discarded SCR catalyst investment pulverizer 1, pulverization process is carried out by the pulverization roller 3 in pulverizer 1；Again
Smashed slurries are put into reaction kettle 6 by the setting of 6 upper feed hopper 7 of 1 bottom discharge bucket 4 of pulverizer and reaction kettle,
Quantitative sodium hydroxide solution is put by charging line 8, sodium hydroxide solution and the amount ratio of discarded SCR catalyst are herein
1:5 is stirred by being arranged the temperature control in reaction kettle 6 between 86 degree to 90 degree for heating tube 12 and temperature detect switch (TDS) 13
It mixes duration and is set as 9 hours；Stirring is completed, and the solvent after stirring is sucked cooler bin 15 by charging absorption pump, passes through semiconductor
Solvent after refrigerator 17 will be stirred to react carries out cooling treatment, so that solvent cures；By plate and frame filter press 18 will it is cooling at
Solvent after reason carries out filters pressing, to obtain thick titanium valve and filtrate.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (5)
- Thick titanium valve equipment, including pulverizer (1) and Rinsing Area (19) are extracted in 1.SCR catalyst, it is characterised in that: the crushing Machine (1) top is provided with feeding inlet (2), and the pulverization roller by motor drive is arranged in pairs inside the pulverizer (1) (3), pulverizer (1) bottom is communicated with discharge bucket (4), and pulverizer (1) bottom is fixed with reaction kettle by connecting rod (6), and the reaction kettle (6) upper end middle position corresponds to discharge bucket (4) and is communicated with feed hopper (7), reaction kettle (6) side Top is also communicated with charging line (8), is equipped with rabbling mechanism (9) inside the reaction kettle (6), reaction kettle (6) outer wall Side is provided with for clean open slot (10), and the interior activity of the open slot (10) is connected with hermatic door (11), the reaction It is also equipped with heating tube (12) inside kettle (6), reaction kettle (6) outer wall also passes through conducting wire and is connected with temperature detect switch (TDS) (13), institute It states temperature detect switch (TDS) (13) to be connected with external electric socket grafting, reaction kettle (6) bottom side is also communicated with drainage line (14), drainage line (14) end is communicated with cooler bin (15), is also communicated on the drainage line (14) for conveying Charging absorption pump (16), is provided with semiconductor cooler (17) in the cooler bin (15), and the cooler bin (15) bottom side Plate and frame filter press (18) are also communicated with by pipeline.
- 2. extracting thick titanium valve equipment in SCR catalyst according to claim 1, it is characterised in that: the Rinsing Area (19) Having heaters (20) and ultrasonic oscillation device (21) is respectively set in interior bottom and outer bottom, and the Rinsing Area (19) top is arranged Have high temperature nozzle (22), high temperature nozzle (22) end is connected with air compressor (5).
- 3. extracting thick titanium valve equipment in SCR catalyst according to claim 1, it is characterised in that: the hermatic door (11) It is connect by the way that fastening bolt is arranged at equal intervals with reaction kettle (6) outer wall side, the circle of hermatic door (11) outer wall one is also adhered It is covered with the gasket (23) being bonded with open slot (10) inner wall.
- 4. extracting thick titanium valve equipment in SCR catalyst according to claim 1, it is characterised in that: the rabbling mechanism (9) Servo motor is connected to including servo motor (91), stirring main shaft (92) and stirring branch (93), the stirring main shaft (92) (91) output end, the stirring main shaft (92) are connected to reaction kettle (6) by bearing and extend to inside it, the stirring point Branch (93) is located at reaction kettle (6) inside and is fixed on stirring main shaft (92) at equal intervals by bolt.
- 5. extracting the application method of thick titanium valve equipment in a kind of SCR catalyst described in claim 1, it is characterised in that: specific The following steps are included:S1, first discarded SCR catalyst is placed in Rinsing Area (19), and the interior bottom of Rinsing Area (19) and outer bottom are respectively arranged with Heater (20) and ultrasonic oscillation device (21), and Rinsing Area (19) top is provided with and is connected to air compressor (5) gas vent High temperature nozzle (22), thus the pre-processing process that discarded SCR catalyst is purged, is washed；S2, again by moist discarded SCR catalyst investment pulverizer (1), carried out by the pulverization roller (3) in pulverizer (1) Pulverization process；S3, by the setting of pulverizer (1) bottom discharge bucket (4) and reaction kettle (6) upper feed hopper (7) by smashed slurries It puts into reaction kettle (6), puts into quantitative sodium hydroxide solution by charging line (8), herein sodium hydroxide solution and useless The amount ratio for abandoning SCR catalyst is 1:5, by the setting of heating tube (12) and temperature detect switch (TDS) (13) by the temperature in reaction kettle (6) Control is spent between 86 degree to 90 degree, and stirring duration is set as 9 hours；S4, stirring are completed, and the solvent after stirring is sucked cooler bin (15) by charging absorption pump, will by semiconductor cooler (17) Solvent after being stirred to react carries out cooling treatment, so that solvent cures；S5, the solvent after cooling treatment is subjected to filters pressing by plate and frame filter press (18), to obtain thick titanium valve and filtrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810730701.9A CN108998670A (en) | 2018-07-05 | 2018-07-05 | Thick titanium valve device and method thereof are extracted in SCR catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810730701.9A CN108998670A (en) | 2018-07-05 | 2018-07-05 | Thick titanium valve device and method thereof are extracted in SCR catalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108998670A true CN108998670A (en) | 2018-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810730701.9A Pending CN108998670A (en) | 2018-07-05 | 2018-07-05 | Thick titanium valve device and method thereof are extracted in SCR catalyst |
Country Status (1)
| Country | Link |
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| CN (1) | CN108998670A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753930A (en) * | 2021-08-27 | 2021-12-07 | 南京公诚节能新材料研究院有限公司 | Water purifying agent for landscape water and preparation process thereof |
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| CN204265820U (en) * | 2014-11-24 | 2015-04-15 | 清华大学 | A kind of retrieving arrangement of useless vanadium tungsten titanium catalyst |
| CN105536817A (en) * | 2015-09-11 | 2016-05-04 | 福建紫荆环境工程技术有限公司 | Waste SCR denitration catalyst comprehensive recovery and utilization method and system |
| CN105709863A (en) * | 2014-12-05 | 2016-06-29 | 中国石油化工股份有限公司 | SCR flue gas denitration catalyst regeneration fluid and preparation method thereof |
| CN104451152B (en) * | 2014-11-10 | 2016-08-24 | 大唐南京环保科技有限责任公司 | Vanadium, molybdenum, the device for continuously recycling of titanium and recovery process in SCR spent catalyst |
| CN106119544A (en) * | 2016-06-22 | 2016-11-16 | 中电恒德（北京）环保投资有限公司 | A kind of extraction titanium slag, tungsten and method of vanadic salts from discarded SCR catalyst |
-
2018
- 2018-07-05 CN CN201810730701.9A patent/CN108998670A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464221A (en) * | 2013-09-03 | 2013-12-25 | 广东电网公司电力科学研究院 | SCR (Selective Catalytic Reduction) denitration system catalyst regeneration equipment and regeneration technology method |
| CN104451152B (en) * | 2014-11-10 | 2016-08-24 | 大唐南京环保科技有限责任公司 | Vanadium, molybdenum, the device for continuously recycling of titanium and recovery process in SCR spent catalyst |
| CN204265820U (en) * | 2014-11-24 | 2015-04-15 | 清华大学 | A kind of retrieving arrangement of useless vanadium tungsten titanium catalyst |
| CN105709863A (en) * | 2014-12-05 | 2016-06-29 | 中国石油化工股份有限公司 | SCR flue gas denitration catalyst regeneration fluid and preparation method thereof |
| CN105536817A (en) * | 2015-09-11 | 2016-05-04 | 福建紫荆环境工程技术有限公司 | Waste SCR denitration catalyst comprehensive recovery and utilization method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753930A (en) * | 2021-08-27 | 2021-12-07 | 南京公诚节能新材料研究院有限公司 | Water purifying agent for landscape water and preparation process thereof |
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Application publication date: 20181214 |