CN220098729U - Low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor - Google Patents
Low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor Download PDFInfo
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- CN220098729U CN220098729U CN202320677876.4U CN202320677876U CN220098729U CN 220098729 U CN220098729 U CN 220098729U CN 202320677876 U CN202320677876 U CN 202320677876U CN 220098729 U CN220098729 U CN 220098729U
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- reaction
- ammonia nitrogen
- zeolite
- plate
- fluidized bed
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- 229910021536 Zeolite Inorganic materials 0.000 title claims abstract description 61
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 239000010457 zeolite Substances 0.000 title claims abstract description 61
- 239000002351 wastewater Substances 0.000 title claims abstract description 45
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 230000009935 nitrosation Effects 0.000 title claims abstract description 34
- 238000007034 nitrosation reaction Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000006243 chemical reaction Methods 0.000 claims abstract description 53
- 239000000843 powder Substances 0.000 claims abstract description 38
- 239000000945 filler Substances 0.000 claims abstract description 32
- 238000012856 packing Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000005276 aerator Methods 0.000 claims description 2
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 238000005273 aeration Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 238000011282 treatment Methods 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 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
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Water Treatment By Sorption (AREA)
Abstract
The utility model discloses a low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor, which comprises: the reaction barrel comprises a barrel body and a grid plate, wherein the lower end of the grid plate is connected with the upper end of the barrel body, a filter plate is arranged in the barrel body to divide the inner cavity of the reaction barrel into a reaction area and a water distribution area, the reaction area is positioned above the water distribution area, zeolite powder filler is loaded in the reaction area, the water distribution area is provided with a water inlet, and the reaction area is connected with a first aeration pipe; the inclined bucket, the lower extreme of inclined bucket with the upper end of staving is connected, inclined bucket is equipped with the delivery port, the upside of the inner wall of inclined bucket is equipped with out the water weir, go out the water weir with the delivery port intercommunication, go out the upper end of water weir be higher than the upper end of division board, the bottom of division board is equipped with the opening so that be located inclined bucket zeolite powder filler gets into the reaction zone.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to a zeolite fluidized bed nitrosation reactor for low ammonia nitrogen wastewater.
Background
The current mainstream low ammonia nitrogen wastewater (such as municipal sewage, partial mining sewage, electroplating wastewater and the like) treatment method is a complete nitrification and denitrification method. The method has the defects of large aeration energy consumption, large occupied area, large carbon source addition amount and the like, and the operation cost and the investment cost of the sewage plant are high. As an emerging biological denitrification technology in recent years, the anaerobic ammonia oxidation has the advantages of high denitrification efficiency, no need of additional carbon source and no treatment of surplus sludge, and is extremely suitable for treating ammonia nitrogen wastewater with low carbon nitrogen ratio. But the precondition of anaerobic ammonia oxidation denitrification is that partial ammonia nitrogen in the wastewater is converted into nitrite nitrogen through stable nitrosation pretreatment. The stable nitrosation of low ammonia nitrogen wastewater is a recognized technical difficulty, thereby limiting the application of the anaerobic ammonia oxidation technology in the wastewater.
The reported stable nitrosation methods for the medium-high ammonia nitrogen wastewater have a plurality of methods, such as high temperature, high Free Ammonia (FA) inhibition, low dissolved oxygen, low sludge age and the like. And the stable nitrosation method of the low ammonia nitrogen wastewater has less reports. In recent years, research groups utilize zeolite to realize stable nitrosation treatment of low ammonia nitrogen wastewater, but the zeolite is used as a fixed bed filler, so that the defects of low aeration efficiency, high energy consumption and the like caused by hardening are easy to occur. To overcome these problems, there is a need to optimize the form of zeolite fixed bed reactors to advance the stable nitrosation based on zeolite nitrosation technology for low ammonia nitrogen wastewater and subsequent anaerobic ammoxidation treatments.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the utility model provides a zeolite fluidized bed nitrosation reactor for low ammonia nitrogen wastewater.
The embodiment of the utility model provides a low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor, which comprises:
the reaction barrel comprises a barrel body and a dividing plate, wherein the dividing plate is annular, the lower end of the dividing plate is connected with the upper end of the barrel body, a filter plate is arranged in the barrel body to divide the inner cavity of the reaction barrel into a reaction area and a water distribution area, the reaction area is positioned above the water distribution area, zeolite powder filler is loaded in the reaction area, the water distribution area is provided with a water inlet, and the reaction area is connected with a first aeration pipe;
the inclined bucket is annular, the lower extreme of inclined bucket with the upper end of staving is connected, inclined bucket is equipped with the delivery port, the upside of the inner wall of inclined bucket is equipped with the water outlet weir, the water outlet weir with the delivery port intercommunication, the upper end of water outlet weir is higher than the upper end of division board, the bottom of division board is equipped with the opening so that be located inclined bucket zeolite powder filler gets into the reaction zone.
The low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor provided by the embodiment of the utility model has at least the following technical effects: the wastewater enters a water distribution area through a water inlet, then the wastewater enters a reaction area through a filter plate and gradually rises, zeolite powder filler moves upwards along with the water flow, a first aeration pipe conveys air into the reaction area, in the process, the zeolite powder filler contacts with the wastewater and reacts, finally the wastewater continues to rise into a water outlet weir and is discharged through a water outlet, the zeolite powder filler rises along with the wastewater in a dividing plate and falls onto the inner wall of an inclined hopper, and finally the zeolite powder filler falls back into the reaction area through an opening of the dividing plate, so that nitrosation treatment of ammonia nitrogen wastewater is realized; the process improves the nitrosation load and the impact resistance of the reactor, does not have hardening phenomenon after long-term use, and simultaneously has smaller pressure in the reactor, thereby saving aeration energy consumption.
According to some embodiments of the utility model, the zeolite powder filler has a packing fraction K in the reaction zone that satisfies: k is more than or equal to 0.5 and less than or equal to 0.6.
According to some embodiments of the utility model, the inclined bucket comprises a first annular plate and a second annular plate, wherein the first annular plate extends along the vertical direction, the lower end of the first annular plate is connected with the upper end of the second annular plate, and the second annular plate is inclined from top to bottom in a direction approaching to the axis of the inclined bucket.
According to some embodiments of the utility model, an included angle between the second ring plate and the cell plate is θ, which satisfies: θ is more than or equal to 20 degrees and less than or equal to 80 degrees.
According to some embodiments of the utility model, the area between the second ring plate and the cell plate is a sedimentation area, the height of the sedimentation area is H1, and the height of the reaction barrel is H2, satisfying:
according to some embodiments of the utility model, the zeolite powder filler has a particle size D that satisfies: d is more than or equal to 40 meshes and less than or equal to 80 meshes.
According to some embodiments of the utility model, the water distribution area is connected with a backwash air pipe.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a zeolite fluidized bed nitrosation reactor for low ammonia nitrogen wastewater in accordance with some embodiments of the present utility model.
Reference numerals:
reaction barrel 100, barrel body 110, division plate 120, filter plate 130, reaction zone 140, water distribution zone 150, zeolite powder filler 160, water inlet 170, first aeration pipe 181, back flushing air pipe 182;
inclined bucket 200, first annular plate 210, second annular plate 220, settling zone 230, water outlet 240, and water outlet weir 250.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Embodiments of the present utility model will be further described below with reference to the accompanying drawings.
According to some embodiments of the present utility model, referring to fig. 1, a low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor includes a reaction tank 100 and a sloped bucket 200. The reaction tub 100 includes a tub body 110 and a cell plate 120, the tub body 110 is cylindrical and has an opening at an upper end, the cell plate 120 is ring-shaped, and a lower end of the cell plate 120 is connected with an upper end of the tub body 110. The barrel body 110 is internally provided with a filter plate 130, the filter plate 130 divides the inner cavity of the reaction barrel 100 into a reaction area 140 and a water distribution area 150, and the reaction area 140 is positioned above the water distribution area 150. The reaction area 140 is internally provided with zeolite powder filler 160, the water distribution area 150 is provided with a water inlet 170, and the reaction area 140 is connected with a first aeration pipe 181. The inclined bucket 200 is annular, the lower extreme of inclined bucket 200 is connected with the upper end of staving 110, inclined bucket 200 is equipped with delivery port 240, the upside of inclined bucket 200 inner wall is equipped with out water weir 250, out water weir 250 is annular, out water weir 250's cross-section is L shape, out water weir 250 and delivery port 240 intercommunication, out water weir 250's upper end is higher than the upper end of division board 120, the bottom of division board 120 is equipped with the opening so that the zeolite powder filler 160 that is located in inclined bucket 200 can reenter reaction zone 140.
The zeolite powder filler is placed in a reaction zone 140 to be fully contacted with the activated sludge and the wastewater, a nitrosation bacterial biomembrane is formed on the surface of the zeolite powder filler, and microorganisms are in an environment suitable for the growth of nitrosation bacteria through the adsorption-desorption of the zeolite powder filler on ammonia nitrogen, so that the reactor can perform stable nitrosation treatment on the wastewater under the condition that the low ammonia nitrogen wastewater is used as inflow water.
It should be noted that the zeolite powder filler 160 is less likely to cause hardening phenomenon than a reactor using ordinary zeolite.
The tub 110 may have a cylindrical shape or a rectangular parallelepiped shape.
The working procedure of this embodiment includes, but is not limited to: ammonia nitrogen wastewater enters the water distribution area 150 through the water inlet 170, the ammonia nitrogen wastewater in the water distribution area 150 is uniformly distributed into the reaction area 140 by the filter plate 130 along with the rising of the water level in the water distribution area 150, the water level in the reaction area 140 also rises gradually, the zeolite powder filler 160 moves upwards along with the water flow, and meanwhile, the first aerator pipe 181 conveys air into the reaction area 140, so that the reaction area 140 is in a state of uniform aeration and mixing, and the biological film formed on the surface of the zeolite powder filler 160 carries out nitrosation treatment on the ammonia nitrogen wastewater in the aeration process. During the continuous rising of the water level in the reaction zone 140, the zeolite powder packing 160 gradually reaches the upper end of the division plate 120 and drops from the reaction tub 100 into the inclined hopper 200 as the waste water overflows. Due to the presence of the division plate 120, the area between the inclined bucket 200 and the division plate 120 has no aeration disturbance. The zeolite powder filler 160 is fully precipitated in the inclined hopper 200 and is separated from the ammonia nitrogen wastewater. And the ammonia nitrogen wastewater flows out of the reactor through the water outlet weir 250 by then gradually rising in the inclined bucket 200 and entering the water outlet weir 250. The zeolite powder packing 160 slides back into the reaction zone 140 along the hopper 200 through the opening in the bottom of the cell plate 120. The process improves the nitrosation load and the impact resistance of the reactor, does not have hardening phenomenon after long-term use, and simultaneously has smaller pressure in the reactor, thereby saving aeration energy consumption.
It can be understood that the low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor adopts the forms of continuous water inflow and continuous aeration, zeolite powder filler in the reaction barrel 100 generates proper FA concentration after being adsorbed and saturated so as to inhibit nitrite oxidizing bacteria, and nitrosation bacteria microorganisms on the surface of the zeolite powder realize stable nitrosation treatment of ammonia nitrogen wastewater under the condition of sufficient oxygen and alkalinity supply. The zeolite powder filler moves upwards along with water flow to enter the inclined hopper 200 for solid-liquid separation, the zeolite powder after precipitation slides back to the inside of the reactor along with the slope of the inclined hopper 200, and ammonia nitrogen wastewater flows out of the water outlet 240 through the water outlet weir 250.
According to some embodiments of the present utility model, the zeolite powder filler 160 has a packing ratio K in the reaction zone 140 that satisfies the following: k is more than or equal to 0.5 and less than or equal to 0.6. It is ensured that there is enough zeolite powder filler 160 to improve the reaction efficiency while avoiding the influence of excessive zeolite powder filler 160 on the water flow. The filling ratio is a ratio of the total volume of the zeolite powder filler 160 to the volume of the reaction zone 140.
According to some embodiments of the present utility model, referring to fig. 1, the inclined bucket 200 includes a first ring plate 210 and a second ring plate 220, the first ring plate 210 extending in a vertical direction, a lower end of the first ring plate 210 being connected to an upper end of the second ring plate 220, the second ring plate 220 being inclined from top to bottom in a direction approaching an axis of the inclined bucket 200.
Preferably, referring to fig. 1, the second ring plate 220 has an angle θ with respect to the cell plate 120, which satisfies the following: θ is more than or equal to 20 degrees and less than or equal to 80 degrees. Ensuring a sufficiently large area between the second ring plate 220 and the cell plate 120 to accommodate the zeolite powder packing 160 while ensuring that the second ring plate 220 has a sufficient inclination such that the zeolite powder packing 160 flows back into the reaction zone 140 under the force of gravity.
According to some embodiments of the present utility model, the area between the second ring plate 220 and the cell plate 120 is a settling area 230, the height of the settling area 230 is H1, and the height of the reaction tub 100 is H2, satisfying:ensures that the low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor has higher working efficiency.
According to some embodiments of the present utility model, the zeolite powder filler 160 has a particle size D that satisfies the following: d is more than or equal to 40 meshes and less than or equal to 80 meshes.
It is understood that the purpose is to refer to the number of perforations per inch of screen. 50 mesh means that there are 50 holes per inch, 50 x 50 = 2500 holes per square inch; 500 mesh means 500 perforations per inch, 500 x 500 = 250000 perforations per square inch. The higher the mesh number, the more holes. In addition to showing the mesh of the screen, it is used to show the particle size of particles passing through the screen, the higher the mesh size, the smaller the particle size.
According to some embodiments of the utility model, water distribution area 150 is connected to backwash air pipe 182. The backwash air pipe 182 can input air into the water distribution area 150, and when the filter plate 130 is blocked by the zeolite powder filler, the backwash air pipe 182 can flush the filter plate 130.
In the description of the present specification, reference to the term "some embodiments" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. A low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor, comprising:
the reaction barrel (100), the reaction barrel (100) comprises a barrel body (110) and a grid plate (120), the grid plate (120) is annular, the lower end of the grid plate (120) is connected with the upper end of the barrel body (110), a filter plate (130) is arranged in the barrel body (110) to divide an inner cavity of the reaction barrel (100) into a reaction area (140) and a water distribution area (150), the reaction area (140) is positioned above the water distribution area (150), zeolite powder filler (160) is loaded in the reaction area (140), the water distribution area (150) is provided with a water inlet (170), and the reaction area (140) is connected with a first aerator pipe (181);
the inclined hopper (200), inclined hopper (200) are cyclic annular, the lower extreme of inclined hopper (200) with the upper end of staving (110) is connected, inclined hopper (200) are equipped with delivery port (240), the upside of the inner wall of inclined hopper (200) is equipped with play water weir (250), play water weir (250) with delivery port (240) intercommunication, the upper end of play water weir (250) is higher than the upper end of division board (120), the bottom of division board (120) is equipped with the opening so that be located inclined hopper (200) zeolite powder filler (160) get into reaction zone (140).
2. The low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor of claim 1, wherein the zeolite powder packing (160) has a packing ratio K in the reaction zone (140) satisfying: k is more than or equal to 0.5 and less than or equal to 0.6.
3. The low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor according to claim 1, wherein the inclined bucket (200) comprises a first annular plate (210) and a second annular plate (220), the first annular plate (210) extends in a vertical direction, a lower end of the first annular plate (210) is connected with an upper end of the second annular plate (220), and the second annular plate (220) is inclined from top to bottom in a direction approaching to an axis of the inclined bucket (200).
4. A low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor according to claim 3, wherein the second ring plate (220) has an included angle θ with the cell plate (120) of: θ is more than or equal to 20 degrees and less than or equal to 80 degrees.
5. A low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor according to claim 3, characterized in that the area between the second ring plate (220) and the cell plate (120) is a precipitation zone (230), the height of the precipitation zone (230) is H1, the height of the reaction barrel (100) is H2, satisfying:
6. the low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor according to claim 1, wherein the zeolite powder filler (160) has a particle size D that satisfies: d is more than or equal to 40 meshes and less than or equal to 80 meshes.
7. The low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor of claim 1, wherein the water distribution zone (150) is connected with a backwash air pipe (182).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320677876.4U CN220098729U (en) | 2023-03-30 | 2023-03-30 | Low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320677876.4U CN220098729U (en) | 2023-03-30 | 2023-03-30 | Low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor |
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| CN220098729U true CN220098729U (en) | 2023-11-28 |
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| CN202320677876.4U Active CN220098729U (en) | 2023-03-30 | 2023-03-30 | Low ammonia nitrogen wastewater zeolite fluidized bed nitrosation reactor |
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| CN (1) | CN220098729U (en) |
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