CN212881904U - Filtering structure - Google Patents
Filtering structure Download PDFInfo
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- CN212881904U CN212881904U CN202021422135.4U CN202021422135U CN212881904U CN 212881904 U CN212881904 U CN 212881904U CN 202021422135 U CN202021422135 U CN 202021422135U CN 212881904 U CN212881904 U CN 212881904U
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Abstract
The utility model discloses a filtration structure, filtration structure include inorganic filtration base member and organic coupling layer, inorganic filtration base member has a plurality of first filtration holes, the aperture of first filtration hole all is less than or equal to 60nm, inorganic filtration base member includes supporter and rete, the material of supporter is alpha-Al 2O3, the material of rete is ZrO2, organic coupling layer includes sulfonated polysulfone and dimethylacetamide, each the pore wall of first filtration hole all is provided with organic coupling layer forms a plurality of second filtration holes, the value in the aperture of second filtration hole does 0.8~0.95 times of the value in the aperture of first filtration hole. The technical scheme can solve the problem that the infrastructure cost and the equipment cost are relatively high when the inorganic membrane oil removal equipment and the organic membrane organic matter removal equipment are installed in series at present.
Description
Technical Field
The utility model relates to a filtration membrane technical field especially relates to a filtration structure.
Background
In the field of water treatment, it is a common filtration method to filter water by using a filtration membrane. Common filtration membrane divide into organic membrane and inorganic membrane usually, the cost of organic membrane is lower, the high temperature resistance and the corrosion resisting property of inorganic membrane are all relatively better, and mechanical strength is high, and inorganic membrane is better than organic membrane in the filterability in fields such as waste emulsion, consequently, in the processing procedure to the comparatively complicated waste water of pollutant, need use inorganic membrane and organic membrane simultaneously to filter usually, with oily substance and the organic matter that contains in the aquatic filter, but, at present, it is relatively higher to remove infrastructure cost and the equipment cost homogeneous phase when organic matter equipment is established ties to the installation with inorganic membrane deoiling equipment and organic membrane.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a filtering structure to solve infrastructure cost and the relatively higher problem of equipment cost homogeneous phase when inorganic membrane deoiling equipment and organic membrane remove organic matter equipment series connection installation at present.
In order to solve the above problem, the utility model adopts the following technical scheme:
the embodiment of the utility model discloses filtration structure, it includes inorganic filtration base member and organic coupling layer, inorganic filtration base member has a plurality of first filtration holes, the first aperture of filtering the hole all is less than or equal to 60nm, inorganic filtration base member includes supporter and rete, instituteThe support body is made of alpha-Al2O3The material of the film layer is ZrO2The organic coupling layer comprises sulfonated polysulfone and dimethylacetamide, the organic coupling layer is arranged on the wall of each first filtering hole to form a plurality of second filtering holes, and the aperture value of each second filtering hole is 0.8-0.95 times that of each first filtering hole.
The utility model discloses a technical scheme can reach following beneficial effect:
the utility model discloses a filtering structure spare, it includes inorganic filtration base member and organic coupling multiple layer, and wherein, inorganic filtration base member has a plurality of first filtration holes, and the aperture of first filtration hole is less than or equal to 60nm, and the material of the supporter of inorganic filtration base member is alpha-Al2O3The material of the film layer is ZrO2The size of the first filtering hole is further reduced by forming the organic coupling layer in the first filtering hole of the inorganic filtering base body, the second filtering hole with smaller size is formed, and the aperture value of the second filtering hole is 0.8-0.95 times of the aperture value of the first filtering hole, so that the filtering performance of the filtering structural member is improved, and the filtering structural member formed by attaching the organic coupling layer to the inorganic filtering base body can simultaneously remove organic pollutants and oil pollutants in the treated water.
In addition, in the process of compounding the organic coupling layer and the inorganic filtering matrix, on one hand, sulfonated polysulfone and dimethylacetamide can be directly deposited on the hole wall of the first filtering hole, and on the other hand, a new chemical piece can be formed, and in detail, dimethylacetamide serving as a solvent of the sulfonated polysulfone and a non-solvent on the surface layer of the inorganic filtering matrix can perform double diffusion and electrostatic adsorption processes; meanwhile, in the compounding process, the sulfonated polysulfone is also connected with functional groups such as hydroxyl on the wall of a first filtering hole in the inorganic filtering matrix in a new chemical bond mode, and meanwhile, the organic coupling layer also chelates zirconium metal groups on the surface of the inorganic filtering matrix to generate PSF-DMA-ZrO2A composite material.
The embodiment of the utility model provides a filtration is provided mainly through the mode that the selectivity of pore interception, physical adsorption and partial functional group combines to the filtration, and compares conventional inorganic membrane, the utility model discloses a filtration is through combining the organic coupling layer for the hydrophilicity of material is showing the reinforcing, also makes filtration's antipollution ability in the separation process and obtains the reinforcing. In addition, the number of functional groups on the surface of the filtering structural member is also obviously increased, and the chelated metal groups can form charge factors through protonation or deprotonation, so that the electric property of the membrane surface is improved, and the filtering performance of the filtering structural member is further improved.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
FIG. 1 is a chemical structure diagram of an inorganic filter matrix in a filter structure according to an embodiment of the present invention;
FIG. 2 is a schematic chemical diagram of a first intermediate product in a filter structure according to an embodiment of the present invention;
FIG. 3 is a schematic chemical diagram of a first intermediate product in a filter structure according to an embodiment of the present invention;
FIG. 4 is a chemical block diagram of a filter construction according to an embodiment of the present invention;
fig. 5 is a flow chart illustrating a method for manufacturing a filter structure according to an embodiment of the present invention.
Description of reference numerals:
100-inorganic filter matrix, 110-first filter hole, 120-second filter hole, 310-organic coupling sol, 320-organic coupling gel, 330-organic coupling layer.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 4, an embodiment of the present invention discloses a filter structure, which includes an inorganic filter substrate 100 and an organic coupling layer 330.
As shown in FIG. 1, the inorganic filter substrate 100 has a plurality of first filter pores 110, the pore diameters of the first filter pores 110 are less than or equal to 60nm, the inorganic filter substrate 100 includes a support and a membrane layer, the support is made of α -Al2O3The material of the film layer is ZrO2The membrane layer is supported on a support to form an inorganic filter substrate 100. Specifically, the inorganic filter substrate 100 may be a flat plate-shaped structure, and the support and the membrane layer are formed with a plurality of first filter holes 110. In another embodiment of the present invention, the inorganic filtering substrate 100 is a tubular inorganic ceramic membrane, and more specifically, the aperture of the first filtering hole 110 is between 30nm and 50nm, the channel aperture of the inorganic filtering substrate 100 can be between 3.2 and 3.6mm, and in addition, the parameters such as the outer diameter and the length of the inorganic filtering substrate 100 can be selected according to actual requirements.
The organic coupling layer 330 is a sulfonated polysulfone-dimethylacetamide organic coupling layer, the sulfonated polysulfone-dimethylacetamide organic coupling layer comprises sulfonated polysulfone and dimethylacetamide, and the sulfonated polysulfone is a novel nanofiltration material and a reverse osmosis organic membrane material and has good chemical resistance and antibacterial decomposition resistance, so that the sulfonated polysulfone is used as a forming material of the organic coupling layer 330, and the whole filtering capacity of the filtering structure is good. The dimethylacetamide has good thermal stability, is not easy to hydrolyze, has low corrosivity and low toxicity, so that the dimethylacetamide is used as a solvent material of the sulfonated polysulfone, and the problem of secondary pollution in the filtering process can be prevented.
In the process of forming the organic coupling layer 330, the sulfonated polysulfone may be dissolved in dimethylacetamide to form a liquid organic coupling layer 330, the ratio of the two layers may be determined according to actual requirements, and then the organic coupling layer 330 may be formed on the inorganic filter substrate 100 by means of spraying or brushing, so that the organic coupling layer 330 is disposed on the hole wall of each first filter hole 110, after the organic coupling layer 330 blocks a part of the first filter hole 110, a plurality of second filter holes 120 having smaller hole diameters may be formed, and the hole diameter value of the formed second filter holes 120 may be 0.8 to 0.95 times the hole diameter value of the first filter hole 110.
The embodiment of the utility model discloses filtration structure, it includes inorganic filtration base member 100 and organic coupling layer 330, and wherein, inorganic filtration base member 100 has a plurality of first filtration holes 110, and the aperture of first filtration hole 110 is less than or equal to 60nm, and the material of inorganic support body of filtering base member 100 is alpha-Al2O3The material of the film layer is ZrO2By forming the organic coupling layer 330 in each of the first filtering holes 110 of the inorganic filtering substrate 100, the size of the first filtering holes 110 can be further reduced, the second filtering holes 120 with smaller size can be formed, and the aperture of the second filtering holes 120 is 0.8-0.95 times of the aperture of the first filtering holes 110, so that the filtering performance of the filtering structure is improved, and the organic pollutants and the oil pollutants in the treated water can be removed simultaneously by attaching the filtering structure formed by the organic coupling layer 330 to the inorganic filtering substrate 100.
In addition, in the process of compounding the organic coupling layer 330 and the inorganic filter substrate 100, on one hand, sulfonated Polysulfone (PSF) and Dimethylacetamide (DMA) may be directly deposited on the walls of the first filter pores 110, and on the other hand, new chemical pieces may be formed in the compounding process. In detail, dimethylacetamide as a solvent for sulfonated polysulfone can undergo double diffusion (as indicated by thick and thin arrows in fig. 2) and electrostatic adsorption (as indicated by region I in fig. 2) with the surface non-solvent of the inorganic filter substrate 100, thereby making the bonding relationship between the organic coupling layer 330 and the inorganic filter substrate 100 stronger; meanwhile, in the compounding process, the sulfonated polysulfone is also mixed with the inorganic filter matrix 100Functional groups such as hydroxyl on the walls of the first filtering holes 110 are connected in a new chemical bond form (as shown in the area II in FIG. 2), and meanwhile, the organic coupling layer 330 also chelates zirconium metal groups on the surface of the inorganic filtering substrate 100 to generate PSF-DMA-ZrO2A composite material. Optionally, the ratio of the sulfonated polysulfone to the dimethylacetamide is 20: 80, in this case, the bonding relationship between the inorganic filter substrate 100 and the organic coupling layer 330 can be more stabilized.
The embodiment of the utility model provides a filtration is provided mainly through the mode that the selectivity of pore interception, physical adsorption and partial functional group combines to the filtration, and compares conventional inorganic membrane, the utility model discloses a filtration is through combining organic coupling layer 330 for the hydrophilicity of material is showing the reinforcing, also makes the antipollution ability of filtration in the separation process and is strengthened. In addition, the number of functional groups on the surface of the filtering structural member is also obviously increased, and the chelated metal groups can form charge factors through protonation or deprotonation, so that the electric property of the membrane surface is improved, and the filtering performance of the filtering structural member is further improved.
Optionally, the embodiment of the utility model discloses in the filtration structure, the degree of sulfonation of the sulfonated polysulfone of organic coupling layer 330 is 35%, and under this condition, the quantity of the phosphate group that this kind of polymer of sulfonated polysulfone contains can satisfy the demand, and the structure of sulfonated is comparatively stable, and the performance is higher relatively, and in addition, under the condition of adopting above-mentioned technical scheme, the speed when can also guaranteeing fluid process filtration structure is higher relatively, guarantees that filtration structure has higher filtration efficiency.
Based on the filter structure disclosed in the above embodiments, as shown in fig. 1 to 5, the utility model discloses a preparation method is also disclosed for preparing the filter structure disclosed in any of the above embodiments, and the preparation method includes the contents of steps S1-S4.
S1, obtaining an inorganic filtering matrix 100, wherein the inorganic filtering matrix 100 is provided with a plurality of first filtering holes 110, the pore diameters of the first filtering holes 110 are all less than or equal to 60nm, the inorganic filtering matrix 100 comprises a support body and a membrane layer, and the support body is made of alpha-Al2O3The material of the film layer is ZrO2。
Specifically, in the inorganic filter substrate 100, the membrane layer is supported on a support to form the inorganic filter substrate 100, and a plurality of first filter holes 110 are formed in both the support and the membrane layer. Alternatively, the inorganic filter substrate 100 is a tubular inorganic ceramic membrane.
S2, obtaining an organic coupling sol 310, wherein the organic coupling sol 310 comprises sulfonated polysulfone and dimethylacetamide. Specifically, the organic coupling sol 310 may be formed by dissolving sulfonated polysulfone into dimethylacetamide. Alternatively, in the process of preparing the organic coupling sol 310, the ratio of the sulfonated polysulfone to the dimethylacetamide may be 20: 80 to ensure that the bonding relationship between the organic coupling sol 310 and the inorganic filter matrix 100 is more stable. It should be noted that there is no sequence relationship between step S1 and step S2, the implementation processes of both may be sequential or may be performed simultaneously, and optionally, step S1 may be performed first, and then step S2 is performed, so as to prevent the organic coupling sol 310 obtained in step S2 from being placed for a long time to generate physical or chemical changes, which affects the normal operation of the subsequent processes of the preparation method, and ensure that the formed filter structure has good filtering performance.
And S3, immersing the inorganic filter matrix 100 into the organic coupling sol 310 by adopting an immersion method, keeping for a preset time, and taking out to obtain a first intermediate product. As above, the organic coupling layer 330 may be formed on the inorganic filter substrate 100 by spraying or brushing. In this embodiment, the organic coupling sol 310 is bonded to the inorganic filtering substrate 100 by using an immersion method, so that on one hand, the organic coupling sol 310 can be covered on the hole wall of each first filtering hole 110 of the inorganic filtering substrate 100, and on the other hand, the bonding time between the organic coupling sol 310 and the inorganic filtering substrate 100 can be increased, so that the organic coupling sol 310 can be better covered in each first filtering hole 110 of the inorganic filtering substrate 100, and the yield is improved. The preset time may be determined according to the proportioning relationship between the sulfonated polysulfone and the dimethylacetamide in the organic coupling sol 310 and actual parameters such as the temperature of the organic coupling sol 310, and more specifically, the preset time may be 10min, which may basically ensure that the organic coupling sol 310 may better cover the hole walls of the first filtering holes 110, and may ensure that the processing efficiency is relatively high.
S4, drying the first intermediate product to obtain a filtering structural member, wherein the filtering structural member is provided with a plurality of second filtering holes 120, and the aperture value of the second filtering holes 120 is 0.8-0.95 times that of the first filtering holes 110.
Specifically, the organic coupling layer 330 may be formed by drying the organic coupling sol 310 by natural drying or baking, and the organic coupling layer 330 is adhered and fixed on the wall of the first filtering hole 110, so as to reduce the aperture of the first filtering hole 110 and form a plurality of second filtering holes 120 with smaller apertures.
Further, the step S2 includes:
s21, under the heating condition, obtaining the organic coupling sol 310, wherein the organic coupling sol 310 comprises sulfonated polysulfone and dimethylacetamide. Specifically, after the sulfonated polysulfone and the dimethylacetamide are put into the batching kettle in a preset ratio, the batching kettle can be heated by adopting a direct heating or water bath heating mode and the like, so that the dissolving rate of the sulfonated polysulfone is increased, and the preparation time of the organic coupling sol 310 is shortened. Further, in the process of preparing the organic coupling sol 310, the preparation efficiency of the organic coupling sol 310 can be further improved by stirring.
Further, the step S21 includes:
s22, under the heating condition of heat conducting oil at the temperature of 80-110 ℃, obtaining the organic coupling sol 310, wherein the organic coupling sol 310 comprises sulfonated polysulfone and dimethylacetamide. That is to say, the ingredient kettle is heated by means of heat conduction oil, on one hand, the heat transfer efficiency of the heat conduction oil is relatively high, and on the other hand, compared with water, the upper limit of the heated temperature of the heat conduction oil is relatively high, so that the heated temperature of the organic coupling sol 310 is higher, the dissolution rate of the sulfonated polysulfone can be further increased, and the preparation time of the organic coupling sol 310 can be further shortened. More specifically, the temperature of the heat transfer oil can be set between 90 ℃ and 100 ℃.
Optionally, between step S22 and step S3, further comprising:
s5, reducing the temperature of the organic coupling sol 310 to 50 ℃, on one hand, preventing the sulfonated polysulfone from being precipitated from dimethylacetamide when the temperature is too low, and on the other hand, preventing the structural strength or chemical properties of the inorganic filter matrix 100 from being affected by the too high temperature of the organic coupling sol 310. Specifically, after the preparation of the organic coupling sol 310 is completed, the temperature of the organic coupling sol 310 may be decreased by adopting a natural cooling manner, and the temperature of the organic coupling sol 310 may be maintained at 50 ℃ by using a heat-conducting oil heating and heat-preserving manner.
Optionally, between step S2 and step S3, further comprising:
s6, performing vacuum defoaming on the organic coupling sol 310, that is, separating bubbles mixed into the organic coupling sol 310 during the preparation of the organic coupling sol 310 by a vacuum defoaming method, which can prevent bubbles from attaching to the inorganic filtering substrate 100 in the process of combining the organic coupling sol 310 and the inorganic filtering substrate 100 due to the presence of the bubbles in the organic coupling sol 310, so that the positions corresponding to the bubbles in the inorganic filtering substrate 100 cannot be covered by the organic coupling sol 310, and further, the organic coupling layer 330 is not attached to the pore walls of some first filtering pores 110 on the formed filtering structural members, so that the filtering performance of the filtering structural members is insufficient.
Optionally, the step S4 includes:
s41, drying the first intermediate product to solidify the organic coupling sol 310 into an organic coupling gel 320, and forming a second intermediate product;
s42, roasting the second intermediate product to obtain a filtering structural member, wherein the filtering structural member is provided with a plurality of second filtering holes 120, and the aperture value of the second filtering holes 120 is 0.8-0.95 times that of the first filtering holes 110.
By adopting the above technical scheme, the drying speed of the first intermediate product can be obviously improved, the production efficiency can be improved, and the situation that the amount of the organic coupling layer 330 combined in the hole wall of each first filtering hole 110 is reduced in the drying process can be further prevented under the condition that the drying time is shortened.
Specifically, after the first intermediate product is obtained, the first intermediate product may be placed in an oven at 150 ℃ for 20min, thereby solidifying the organic coupling sol 310 to form the organic coupling gel 320. And then, placing the second intermediate product in a muffle furnace at 500 ℃ and roasting for 10min in an air atmosphere to form a filter structure, wherein the temperature of the filter structure formed after roasting is relatively high, so that the filter structure can be cooled in a natural cooling mode after being taken out of the muffle furnace.
The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (4)
1. The filtering structure is characterized by comprising an inorganic filtering substrate and an organic coupling layer, wherein the inorganic filtering substrate is provided with a plurality of first filtering holes, the pore diameters of the first filtering holes are less than or equal to 60nm, the inorganic filtering substrate comprises a supporting body and a membrane layer, and the supporting body is made of alpha-Al2O3The material of the film layer is ZrO2The organic coupling layer is a sulfonated polysulfone-dimethylacetamide organic coupling layer, the organic coupling layer is arranged on the wall of each first filtering hole to form a plurality of second filtering holes, and the aperture of each second filtering hole is equal to the aperture of each second filtering holeThe aperture value of the first filtering hole is 0.8-0.95 times.
2. The filter structure according to claim 1, wherein the inorganic filter matrix is a tubular inorganic ceramic membrane.
3. The filter structure according to claim 2, wherein the inorganic filter matrix has a channel pore size of 3.2 to 3.6 mm.
4. The filter structure according to claim 1, wherein the first filter pores have a pore size of 30nm to 50 nm.
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| CN202021422135.4U CN212881904U (en) | 2020-07-17 | 2020-07-17 | Filtering structure |
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| CN202021422135.4U CN212881904U (en) | 2020-07-17 | 2020-07-17 | Filtering structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111686589A (en) * | 2020-07-17 | 2020-09-22 | 西藏神州瑞霖环保科技股份有限公司 | Filter structure and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111686589A (en) * | 2020-07-17 | 2020-09-22 | 西藏神州瑞霖环保科技股份有限公司 | Filter structure and preparation method thereof |
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