CN219991228U - Alkalization adsorption component - Google Patents
Alkalization adsorption component Download PDFInfo
- Publication number
- CN219991228U CN219991228U CN202321408515.6U CN202321408515U CN219991228U CN 219991228 U CN219991228 U CN 219991228U CN 202321408515 U CN202321408515 U CN 202321408515U CN 219991228 U CN219991228 U CN 219991228U
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- Prior art keywords
- alkalization
- adsorption
- resin layer
- exchange resin
- adsorption component
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 129
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000000498 cooling water Substances 0.000 claims abstract description 39
- 238000000926 separation method Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000012528 membrane Substances 0.000 claims abstract description 20
- 230000001105 regulatory effect Effects 0.000 claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052802 copper Inorganic materials 0.000 claims abstract description 16
- 239000010949 copper Substances 0.000 claims abstract description 16
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 23
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 22
- 239000011148 porous material Substances 0.000 claims description 18
- 239000003729 cation exchange resin Substances 0.000 claims description 16
- 239000003456 ion exchange resin Substances 0.000 claims description 15
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 12
- 230000003113 alkalizing effect Effects 0.000 claims description 11
- 230000003020 moisturizing effect Effects 0.000 claims description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000003957 anion exchange resin Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical group [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 22
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The utility model relates to the field of water treatment, in particular to an alkalization adsorption component, which aims to solve the problems that local overheat burning loss of a laser transmitter is caused by the fact that acidic cooling water is not suitable for cooling the laser transmitter due to gradual degradation of water quality of a small pure water cooling system, and serious harm is caused to the stable operation of the laser transmitter; the cooling water eduction tube that copper metal solid-liquid separation membrane encloses and is synthesized passes behind the lateral wall of inner tube and is connected with alkalization adsorption component pressure regulating outlet pipe, and this scheme guarantees that cooling water is in alkaline state, does benefit to laser emitter and moves back the temperature.
Description
Technical Field
The utility model relates to the field of water treatment, in particular to an alkalization adsorption component.
Background
In the small pure water cooling system, pure water is used as an exchange medium, and in the process of recycling the pure water for cooling, oxygen and carbon dioxide in the air are continuously dissolved into the cooling water due to the imprecision of the cooling system, so that the pure water quality of the cooling system is gradually deteriorated, the cooling water becomes an acidic solution with the pH value less than 7, and the corrosion to the heat exchanger is accelerated in a high-temperature environment. The continuous dissolution of oxygen and carbon dioxide and corrosion of the generated corrosion products can lead to the rise of the conductivity of cooling water, influence the insulation performance of relevant parts, and simultaneously, the deposition of the corrosion products generated by electrochemical corrosion influences the cooling and heat dissipation performance of a pure water cooling system, so that local overheat burning loss is caused, and serious harm is caused to the stable operation of a laser emitter.
The laser generator is in the use need carry out circulative cooling with outside small-size pure water cooling system, because small-size pure water cooling system quality of water deteriorates gradually, and acid cooling water is not suitable for laser emitter cooling, can lead to laser emitter local super temperature to burn out, has caused serious harm to laser emitter's steady operation, has influenced laser emitter's normal safe handling.
Disclosure of Invention
The utility model aims to solve the problems that the acidic cooling water is not suitable for cooling a laser emitter due to gradual degradation of the water quality of a small pure water cooling system, local overheat burning loss of the laser emitter is caused, and serious harm is caused to the stable operation of the laser emitter.
An alkalization adsorption assembly comprises an outer cylinder, an inner cylinder, an alkalization adsorption assembly inlet valve, an alkalization adsorption assembly pressure regulating valve and an alkalization adsorption assembly outlet valve
The wall of the outer cylinder is provided with an inlet pipe of the alkalization adsorption assembly and an outlet pipe of the alkalization adsorption assembly, which are communicated with the inlet pipe of the alkalization adsorption assembly; the inlet pipe of the alkalization adsorption component is positioned above the pressure-regulating outlet pipe of the alkalization adsorption component and the outlet pipe of the alkalization adsorption component, the inlet pipe of the alkalization adsorption component is communicated with the top of the inner cylinder, the inner cylinder is arranged in the outer cylinder, the bottom space of the inner cylinder is communicated with the space of the outer cylinder, a gap is reserved between the outer wall of the inner cylinder and the inner wall of the outer cylinder, and the inner cylinder is internally provided with active carbon adsorption filler, copper metal solid-liquid separation membrane and ion exchange resin layer from top to bottom in sequence; the cooling water eduction tube formed by surrounding the copper metal solid-liquid separation membrane is connected with the pressure-regulating outlet tube of the alkalization adsorption component after penetrating through the side wall of the inner cylinder, and the metal solid-liquid separation membrane is used for intercepting pure water cooling water and discharging the pure water cooling water through the cooling water eduction tube.
Further, an inlet valve of the alkalization adsorption component is arranged on the inlet pipe of the alkalization adsorption component.
Still further, an alkalization adsorption assembly pressure regulating valve is arranged on the alkalization adsorption assembly pressure regulating outlet pipe.
Further, an outlet valve of the alkalization adsorption component is arranged on the outlet pipe of the alkalization adsorption component.
Further, a plurality of layers of water distribution filter discs are arranged above the activated carbon adsorption filler and between the copper metal solid-liquid separation membrane and the ion exchange resin layer.
Still further, the ion exchange resin layer comprises an acrylic cation exchange resin layer, a styrene cation exchange resin layer, an acrylic anion exchange resin layer and a styrene cation exchange resin layer from top to bottom in this order;
further, a water distribution separating filter disc is arranged between the styrene cation exchange resin layer and the acrylic acid anion exchange resin layer.
Still further, an upper supporting pore plate, a lower supporting pore plate and a bottom supporting pore plate are arranged in the inner cylinder;
the upper support pore plate is positioned above the upper multi-layer water distribution filter disc, the lower support pore plate is positioned between the activated carbon adsorption filler and the metal solid-liquid separation membrane, and the bottom support pore plate is positioned below the ion exchange resin layer.
Further, the bottom of inner tube still is equipped with the moisturizing and supports the orifice plate, and the moisturizing supports the orifice plate and is located the below of bottom sprag orifice plate, is equipped with flexible supporting spring between moisturizing support orifice plate and the bottom sprag orifice plate.
Still further, be provided with a plurality of fixing bolts on the bottom connecting plate of urceolus, fixing bolt is used for fixing the urceolus position.
The beneficial effects are that:
the adsorption filtration unit and the alkalization column are optimally combined to prepare the alkalization adsorption component, so that pure water cooling water is directly alkalized after adsorption filtration, and the alkalization adsorption component can be applied to a small pure water cooling system, so that the water quality can be stably and effectively controlled for a long time, the water quality corrosion is reduced and slowed down, the cooling water is ensured to be in an alkaline state, the temperature of a laser emitter is favorably reduced, and the local overheat burning loss of the laser emitter caused by the cooling water is avoided
And this scheme will adsorb filter unit and alkalization post and optimize the combination, reduces water treatment module's inner space, lightens water treatment module's weight, integrates the part, the maintenance of being convenient for.
Drawings
FIG. 1 is a schematic diagram of an alkalized adsorption module according to the present utility model.
Detailed Description
The first embodiment is as follows: an alkalization adsorption assembly comprises an outer cylinder 13, an inner cylinder 8, an alkalization adsorption assembly inlet valve 1, an alkalization adsorption assembly pressure regulating valve 7 and an alkalization adsorption assembly outlet valve 17
The wall of the outer cylinder 13 is provided with an inlet pipe of the alkalization adsorption assembly and an outlet pipe of the alkalization adsorption assembly, which are communicated with the inlet pipe of the alkalization adsorption assembly; the inlet pipe of the alkalization adsorption component is positioned above the pressure-regulating outlet pipe of the alkalization adsorption component and the outlet pipe of the alkalization adsorption component, the inlet pipe of the alkalization adsorption component is communicated with the top of the inner cylinder 8, the inner cylinder 8 is arranged in the outer cylinder 13, the bottom space of the inner cylinder 8 is communicated with the space of the outer cylinder 13, a gap is reserved between the outer wall of the inner cylinder 8 and the inner wall of the outer cylinder 13, and the inner cylinder 8 is internally provided with an activated carbon adsorption filler 4, a copper metal solid-liquid separation membrane 6 and an ion exchange resin layer from top to bottom in sequence; the cooling water eduction tube surrounded by the copper metal solid-liquid separation film 6 passes through the side wall of the inner cylinder 8 and then is connected with the pressure-regulating outlet tube of the alkalization adsorption component, and the metal solid-liquid separation film 6 is used for intercepting pure water cooling water and discharging the pure water cooling water through the cooling water eduction tube.
In this embodiment, the following will be described: the circulating water to be alkalized discharged from the pure water cooling system enters the inner cylinder from the inlet pipe of the alkalization adsorption component, passes through the activated carbon adsorption filler, and is subjected to impurity adsorption filtration in the activated carbon adsorption filler.
And (3) enabling the filtered pure water cooling water to flow to the copper metal solid-liquid separation membrane, separating copper from the pure water cooling water in the copper metal solid-liquid separation membrane, enabling the intercepted pure water cooling water to enter the outside through a pressure regulating outlet pipe of the alkalization adsorption assembly, and introducing the pure water cooling water into a purification column for cyclic adsorption.
And (3) carrying out water quality alkalization on the pure water cooling water passing through the metal solid-liquid separation membrane and the ion exchange resin layer, enabling the alkalized pure water cooling water to enter a gap between the inner cylinder and the outer cylinder through a space at the bottom of the inner cylinder and a space communication part of the outer cylinder, and finally discharging the alkalized pure water cooling water back to an external pure water cooling system through an outlet pipe of the alkalization adsorption component.
In this embodiment, the following will be described: pure water cooling water is pressurized by an external circulating pump and then enters an adsorption filtering unit through an inlet valve of the alkalization adsorption component, and purified pure water cooling water enters an alkalization cation exchange resin layer for adsorption alkalization after passing through an elastic filtering component. Then enters the alkalization anion exchange resin layer through a separation water distributor for alkalization reinforcement. The alkalized pure water cooling water passes through the multi-layer resin filter screen and then returns to an external pure water cooling system through the outlet valve of the alkalized adsorption component.
The second embodiment is as follows: an alkalization adsorption component, wherein an inlet pipe of the alkalization adsorption component is provided with an inlet valve 1 of the alkalization adsorption component.
In this embodiment, the following will be described: after the inlet valve of the alkalization adsorption component is opened, the waste water to be adsorbed and filtered can be injected into the inlet pipe of the alkalization adsorption component, and the waste water is the circulating water to be alkalized discharged from the pure water cooling system.
And a third specific embodiment: an alkalization adsorption assembly, wherein a pressure regulating valve 7 of the alkalization adsorption assembly is arranged on a pressure regulating outlet pipe of the alkalization adsorption assembly.
In this embodiment, the following will be described: after the pressure regulating valve of the alkalization adsorption assembly is opened, pure water cooling water trapped in the alkalization circulating water enters the outside through the pressure regulating outlet pipe of the alkalization adsorption assembly, and can be optionally guided into a purification column for circulating adsorption.
The specific embodiment IV is as follows: an outlet pipe of the alkalization adsorption component is provided with an outlet valve 17 of the alkalization adsorption component.
In this embodiment, the following will be described: after the outlet valve of the alkalization adsorption component is opened, the cooling water after alkalization adsorption in the alkalization circulating water is discharged back to an external pure water cooling system through the outlet pipe of the alkalization adsorption component.
Fifth embodiment: a plurality of layers of water distribution filter discs 3 are arranged above the activated carbon adsorption filler 4 and between the copper metal solid-liquid separation membrane 6 and the ion exchange resin layer.
In this embodiment, the following will be described: the multi-layer water distribution filter disc is used for enabling the passing pure water to flow uniformly.
Specific embodiment six: an alkalizing adsorption module, the ion exchange resin layer comprises an acrylic cation exchange resin layer 9, a styrene cation exchange resin layer 10, an acrylic anion exchange resin layer 12 and a styrene cation exchange resin layer 13 from top to bottom.
In this embodiment, the following will be described: the acrylic cation exchange resin layer 9, the styrene cation exchange resin layer 10, the acrylic anion exchange resin layer 12 and the styrene cation exchange resin layer 13 are used in combination to alkalize the water quality of the passing water.
Seventh embodiment: an alkalization adsorption component, a separation water distribution filter 11 is arranged between a styrene cation exchange resin layer 10 and an acrylic acid anion exchange resin layer 12.
In this embodiment, the following will be described: the separation water distribution filter disc is used for enabling the passing pure water to flow uniformly.
Eighth embodiment: an alkalization adsorption assembly, wherein an upper support pore plate 2, a lower support pore plate 5 and a bottom support pore plate 14 are arranged in the inner cylinder 8;
the upper support pore plate 2 is positioned above the upper multi-layer water distribution filter disc 3, the lower support pore plate 5 is positioned between the activated carbon adsorption filler 4 and the metal solid-liquid separation membrane 6, and the bottom support pore plate 14 is positioned below the ion exchange resin layer.
In this embodiment, the following will be described: the upper support orifice plate, the lower support orifice plate and the bottom support orifice plate form a support on the inner wall of the inner cylinder, and can enable the passing water to move at Kong Naliu of the upper support orifice plate, the lower support orifice plate and the bottom support orifice plate, so that the passing water flow is uniform.
Detailed description nine: an alkalization adsorption component, the bottom of inner tube 8 still is equipped with moisturizing and supports orifice plate 16, and moisturizing supports orifice plate 16 and is located the below of bottom support orifice plate 14, is equipped with flexible supporting spring 15 between moisturizing support orifice plate 16 and the bottom support orifice plate 14.
Detailed description ten: an alkalization adsorption assembly, be provided with a plurality of fixing bolts 19 on the bottom connecting plate of urceolus 13, fixing bolt 19 is used for fixing urceolus 13 position.
In this embodiment, the following will be described: the fixing bolts fix the position of the outer cylinder, namely the alkalization adsorption assembly is fixed, and optionally, the alkalization adsorption assembly is fixed in the water quality treatment module by the external fixing bolts.
Working principle:
the adsorption filtration unit and the alkalization column are optimally combined to prepare the alkalization adsorption component, so that pure water cooling water is directly alkalized after adsorption filtration, the water quality of the outlet water of the alkalization adsorption component is adjusted to be kept at a ph value of 8.0-9.0, the conductivity is less than 5.0us/cm, the water quality of a small pure water cooling system can be stably and effectively controlled for a long time, and the water quality corrosion is reduced and slowed down.
The working process comprises the following steps:
the utility model provides an alkalization adsorption assembly, which comprises an outer cylinder wall, an alkalization adsorption assembly inlet pipe, an alkalization adsorption assembly pressure regulating outlet pipe and an alkalization adsorption assembly outlet pipe, wherein the alkalization adsorption assembly inlet pipe, the alkalization adsorption assembly pressure regulating outlet pipe and the alkalization adsorption assembly outlet pipe are communicated with the alkalization adsorption assembly, pure water cooling water is pressurized by an external circulating pump and then enters the inner cylinder through the alkalization adsorption assembly inlet pipe, sequentially passes through an activated carbon adsorption filler, a copper metal solid-liquid separation membrane and an ion exchange resin layer, and pure water cooling water intercepted by the copper metal solid-liquid separation membrane enters an external purifying column through the alkalization adsorption assembly pressure regulating outlet pipe for circulating adsorption; purified pure water cooling water passing through the copper metal solid-liquid separation membrane is alkalized by the ion exchange resin layer and then returns to an external pure water cooling system through an outlet pipe of the alkalized adsorption component.
The alkalization adsorption component of the utility model can be fixed in the water quality treatment module by a fixing bolt.
Claims (10)
1. An alkalizing adsorption module, characterized in that: the device comprises an outer cylinder (13), an inner cylinder (8), an inlet valve (1) of an alkalization adsorption assembly, a pressure regulating valve (7) of the alkalization adsorption assembly and an outlet valve (17) of the alkalization adsorption assembly
The wall of the outer cylinder (13) is provided with an inlet pipe of the alkalization adsorption component, an outlet pipe of the alkalization adsorption component and an outlet pipe of the alkalization adsorption component which are communicated with the inlet pipe of the alkalization adsorption component; the inlet pipe of the alkalization adsorption component is positioned above the pressure-regulating outlet pipe of the alkalization adsorption component and the outlet pipe of the alkalization adsorption component, the inlet pipe of the alkalization adsorption component is communicated with the top of the inner cylinder (8), the inner cylinder (8) is arranged in the outer cylinder (13), the bottom space of the inner cylinder (8) is communicated with the space of the outer cylinder (13), a gap is reserved between the outer wall of the inner cylinder (8) and the inner wall of the outer cylinder (13), and the inside of the inner cylinder (8) is sequentially provided with an activated carbon adsorption filler (4), a copper metal solid-liquid separation membrane (6) and an ion exchange resin layer from top to bottom; the cooling water eduction tube surrounded by the copper metal solid-liquid separation membrane (6) passes through the side wall of the inner cylinder (8) and then is connected with the pressure regulating outlet tube of the alkalization adsorption component, and the metal solid-liquid separation membrane (6) is used for intercepting pure water cooling water and discharging the pure water cooling water through the cooling water eduction tube.
2. An alkalizing adsorption module according to claim 1, wherein: an inlet valve (1) of the alkalization adsorption component is arranged on an inlet pipe of the alkalization adsorption component.
3. An alkalizing adsorption module according to claim 1, wherein: an alkalization adsorption assembly pressure regulating valve (7) is arranged on the alkalization adsorption assembly pressure regulating outlet pipe.
4. An alkalizing adsorption module according to claim 1, wherein: an outlet valve (17) of the alkalization adsorption component is arranged on the outlet pipe of the alkalization adsorption component.
5. An alkalizing adsorption module according to claim 1, wherein: a plurality of layers of water distribution filter discs (3) are arranged above the activated carbon adsorption filler (4) and between the copper metal solid-liquid separation membrane (6) and the ion exchange resin layer.
6. An alkalizing adsorption module according to claim 1, wherein: the ion exchange resin layer comprises an acrylic cation exchange resin layer (9), a styrene cation exchange resin layer (10), an acrylic anion exchange resin layer (12) and a styrene cation exchange resin layer (10) from top to bottom in sequence.
7. An alkalizing adsorption module according to claim 6 wherein: a separation water distribution filter disc (11) is arranged between the styrene cation exchange resin layer (10) and the acrylic acid anion exchange resin layer (12).
8. An alkalizing adsorption module according to claim 1, wherein: an upper supporting pore plate (2), a lower supporting pore plate (5) and a bottom supporting pore plate (14) are arranged in the inner cylinder (8);
the upper support pore plate (2) is positioned above the upper multi-layer water distribution filter disc (3), the lower support pore plate (5) is positioned between the activated carbon adsorption filler (4) and the metal solid-liquid separation membrane (6), and the bottom support pore plate (14) is positioned below the ion exchange resin layer.
9. An alkalizing adsorption module according to claim 8 wherein: the bottom of inner tube (8) still is equipped with moisturizing and supports orifice plate (16), and moisturizing supports orifice plate (16) are located the below of bottom sprag orifice plate (14), are equipped with flexible supporting spring (15) between moisturizing support orifice plate (16) and bottom sprag orifice plate (14).
10. An alkalizing adsorption module according to claim 1, wherein: a plurality of fixing bolts (19) are arranged on the bottom end connecting plate of the outer cylinder (13), and the fixing bolts (19) are used for fixing the position of the outer cylinder (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321408515.6U CN219991228U (en) | 2023-06-05 | 2023-06-05 | Alkalization adsorption component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321408515.6U CN219991228U (en) | 2023-06-05 | 2023-06-05 | Alkalization adsorption component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219991228U true CN219991228U (en) | 2023-11-10 |
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ID=88606479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321408515.6U Active CN219991228U (en) | 2023-06-05 | 2023-06-05 | Alkalization adsorption component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219991228U (en) |
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2023
- 2023-06-05 CN CN202321408515.6U patent/CN219991228U/en active Active
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