Water-based resin synthesis treatment filtering and impurity removing device

Abstract

The utility model relates to resin filtering technical field, especially water-based resin synthesis processing filter and impurity removal device, including filter box and box cover, the bottom side of filter box is provided with liquid inlet pipe, installs high pressure feed pump on liquid inlet pipe, the inside of filter box is provided with primary filter assembly, secondary filter assembly and tertiary filter assembly, primary filter assembly, secondary filter assembly and tertiary filter assembly respectively include the primary filter membrane, secondary filter membrane and tertiary filter membrane of the tubular setting, primary filter membrane, secondary filter membrane and tertiary filter membrane all adopt polyvinylidene fluoride filter membrane, the inside of primary filter membrane, secondary filter membrane and tertiary filter membrane all is fixed with polypropylene support net, the bottom of filter box is provided with liquid outlet pipe, installs liquid outlet valve on liquid outlet pipe, and the inside of liquid outlet pipe is located tertiary filter membrane, the utility model guarantees the stability of filter membrane aperture in the filtering process, improves the filtering precision, effectively removes the mechanical impurity, unreacted particle and small solvent wrapped particle in resin system.

Description

Technical Field

[0001] This utility model relates to the field of resin filtration technology, and more specifically to a water-based resin synthesis treatment filtration and impurity removal device. Background Technology

[0002] Waterborne resins are widely used in coatings, adhesives, and other fields. Solvent-based methods are an important synthesis process, with xylene solvent methods ensuring complete resin synthesis by evaporating xylene to remove water generated during esterification. However, this process results in the presence of not only mechanical impurities and unreacted solid particles in the synthesized resin system, but also tiny solvent-encapsulated particles formed from xylene volatilization residue. Existing filtration devices have the following problems:

[0003] First, conventional filter membranes (such as those made of nylon or cellulose acetate) are easily swollen by xylene, leading to enlarged pores, leakage of impurities, or blockage of the filter pores after swelling. Uneven pore size after swelling further reduces the filtration effect. Second, pore deformation caused by filter media swelling, coupled with the lack of targeted filter media gradient design, makes it impossible to form a stable "coarse-medium-fine" filtration layer. As a result, the amount of impurities remaining in the resin after filtration is large, making it difficult to meet the purity requirements of high-quality water-based resins, which directly affects the film-forming performance and adhesion of subsequent coatings and adhesives. Utility Model Content

[0004] The purpose of this invention is to provide a water-based resin synthesis and filtration device to ensure the stability of the filter membrane pore size during the filtration process, improve filtration accuracy, effectively remove mechanical impurities, unreacted particles and tiny solvent-encapsulated particles from the resin system, and meet the purity requirements of high-quality water-based resins.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A water-based resin synthesis treatment filtration and impurity removal device includes a filter box and a cover detachably installed on the top of the filter box. An inlet pipe is provided on one side of the bottom of the filter box, and a high-pressure feed pump is installed on the inlet pipe. A primary filtration assembly, a secondary filtration assembly, and a tertiary filtration assembly are arranged inside the filter box. Each of the primary, secondary, and tertiary filtration assemblies includes a primary filter membrane, a secondary filter membrane, and a tertiary filter membrane arranged in a cylindrical shape. The primary, secondary, and tertiary filter membranes are coaxially arranged, with the secondary filter membrane located outside the tertiary filter membrane, and the primary filter membrane located outside the secondary filter membrane. All primary, secondary, and tertiary filter membranes are made of polyvinylidene fluoride (PVDF). A polypropylene support mesh is fixedly connected to the inner side of each primary, secondary, and tertiary filter membrane. An outlet pipe is provided at the bottom of the filter box, and an outlet valve is installed on the outlet pipe, which is located inside the tertiary filter membrane.

[0007] Furthermore, the pore size of the secondary filter membrane is smaller than that of the primary filter membrane, and the pore size of the tertiary filter membrane is smaller than that of the secondary filter membrane.

[0008] Furthermore, an air inlet pipe is connected to the cover, the air inlet pipe extends to the bottom of the cover and is connected to a guide pipe, the guide pipe is vertically arranged inside the three-stage filter membrane, and an air inlet valve is installed on the air inlet pipe.

[0009] Furthermore, the bottom of the filter box is provided with a first cleaning door, a second cleaning door, and a third cleaning door. The first cleaning door is located between the primary filter membrane and the inner wall of the filter box, the second cleaning door is located between the primary filter membrane and the secondary filter membrane, and the third cleaning door is located between the secondary filter membrane and the tertiary filter membrane.

[0010] Furthermore, a pressure sensor is installed inside the guide pipe, an exhaust pipe is connected to the cover, and a pressure relief valve is installed on the exhaust pipe.

[0011] Furthermore, a hydraulic sensor is installed on the inner wall of the filter box.

[0012] Furthermore, a heating jacket cavity is provided inside the side wall of the filter box, and a heat transfer oil injection pipe and a heat transfer oil discharge pipe connected to the heating jacket cavity are provided on the filter box.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This application uses polyvinylidene fluoride (PVDF) filter membranes as primary, secondary, and tertiary filter membranes. PVDF exhibits excellent chemical stability, effectively resisting the swelling effect of xylene solvent. This solves the problems of pore size deformation and impurity leakage caused by swelling in conventional filter membranes (such as nylon and cellulose acetate), ensuring the stability of the filter membrane pore size during filtration. The primary, secondary, and tertiary filter membranes are coaxially nested to form a three-stage filtration structure, allowing liquid to permeate and filter from the outside to the inside step by step. This achieves a graded filtration effect of "coarse filtration - medium filtration - fine filtration," significantly improving filtration accuracy and effectively removing mechanical impurities, unreacted particles, and tiny solvent-encapsulated particles from the resin system, meeting the purity requirements of high-quality water-based resins. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] 1. Filter box; 101. Heated jacket cavity; 2. Box cover; 3. Liquid inlet pipe; 4. High-pressure feed pump; 5. Primary filter membrane; 6. Secondary filter membrane; 7. Tertiary filter membrane; 8. Polypropylene support mesh; 9. Liquid outlet pipe; 10. Liquid outlet valve; 11. Air inlet pipe; 12. Guide pipe; 13. Air inlet valve; 14. First cleaning door; 15. Second cleaning door; 16. Third cleaning door; 17. Pressure sensor; 18. Exhaust pipe; 19. Pressure relief valve; 20. Hydraulic sensor; 21. Heat transfer oil injection pipe; 22. Heat transfer oil discharge pipe. Detailed Implementation

[0017] like Figure 1 As shown, the water-based resin synthesis treatment filtration and impurity removal device includes a filter box 1 and a cover 2 detachably installed on the top of the filter box 1. A liquid inlet pipe 3 is provided on one side of the bottom of the filter box 1, and a high-pressure feed pump 4 is installed on the liquid inlet pipe 3. A primary filtration assembly, a secondary filtration assembly, and a tertiary filtration assembly are arranged inside the filter box 1. Each of the primary, secondary, and tertiary filtration assemblies includes a primary filter membrane 5, a secondary filter membrane 6, and a tertiary filter membrane 7 arranged in a cylindrical shape. The primary filter membrane 6 and the tertiary filter membrane 7 are coaxially arranged. The secondary filter membrane 6 is located outside the tertiary filter membrane 7, and the primary filter membrane 5 is located outside the secondary filter membrane 6. The primary filter membrane 5, the secondary filter membrane 6, and the tertiary filter membrane 7 are all made of polyvinylidene fluoride. A polypropylene support mesh 8 is fixedly connected to the inner side of the primary filter membrane 5, the secondary filter membrane 6, and the tertiary filter membrane 7. A liquid outlet pipe 9 is provided at the bottom of the filter box 1, and a liquid outlet valve 10 is installed on the liquid outlet pipe 9. The liquid outlet pipe 9 is located inside the tertiary filter membrane 7.

[0018] The pore size of the secondary filter membrane 6 is smaller than that of the primary filter membrane 5, and the pore size of the tertiary filter membrane 7 is smaller than that of the secondary filter membrane 6. The primary filter membrane 5, the secondary filter membrane 6, and the tertiary filter membrane 7 form a clear pore size gradient, ensuring that impurities in the liquid are intercepted step by step according to their particle size from large to small, avoiding impurity blockage or leakage caused by disordered pore size, and further improving filtration accuracy.

[0019] An air inlet pipe 11 is connected to the cover 2. The air inlet pipe 11 extends to the bottom of the cover 2 and is connected to a guide pipe 12. The guide pipe 12 is vertically arranged inside the three-stage filter membrane 7. An air inlet valve 13 is installed on the air inlet pipe 11. The air inlet pipe 11 is connected to a compressed air source. After filtration is completed or when the filter membrane is clogged, impurities attached to the outer surface of the filter membrane can be blown off by reverse air blowing, thereby achieving online cleaning of the filter membrane, reducing the frequency of disassembly and replacement, and improving the continuous operation capability of the device.

[0020] The bottom of the filter box 1 is provided with a first cleaning door 14, a second cleaning door 15, and a third cleaning door 16. The first cleaning door 14 is located between the primary filter membrane 5 and the inner wall of the filter box 1. The second cleaning door 15 is located between the primary filter membrane 5 and the secondary filter membrane 6. The third cleaning door 16 is located between the secondary filter membrane 6 and the tertiary filter membrane 7. The first cleaning door 14, the second cleaning door 15, and the third cleaning door 16 correspond to the impurity deposition areas between the primary filter membrane 5 and the filter box 1 wall, between the primary filter membrane 5 and the secondary filter membrane 6, and between the secondary filter membrane 6 and the tertiary filter membrane 7, respectively, which facilitates targeted cleaning of impurities intercepted at each stage.

[0021] A pressure sensor 17 is installed inside the guide pipe 12, and an exhaust pipe 18 is connected to the cover 2. A pressure relief valve 19 is installed on the exhaust pipe 18. The pressure sensor 17 can monitor the backflushing gas pressure in real time to prevent excessive pressure from damaging the polyvinylidene fluoride filter membrane or insufficient pressure from causing incomplete cleaning. The exhaust pipe 18 works in conjunction with the pressure relief valve 19 to automatically release pressure when the pressure inside the filter box 1 is too high, ensuring the safe operation of the device.

[0022] A hydraulic sensor 20 is installed on the inner wall of the filter box 1. The hydraulic sensor 20 is installed on the inner wall of the filter box 1 and can monitor the real-time pressure on the inlet side. When the pressure is too high (indicating filter membrane blockage), it can trigger reverse air blowing or shutdown for cleaning in time to avoid filter membrane damage or feed pump damage due to overload.

[0023] A heating jacket cavity 101 is provided in the side wall of the filter box 1. The filter box 1 is provided with a heat transfer oil injection pipe 21 and a heat transfer oil discharge pipe 22 connected to the heating jacket cavity 101. The heating jacket cavity 101 is connected to the hot oil furnace through the heat transfer oil injection pipe 21 to control the temperature inside the filter box 1, maintain the viscosity stability of the xylene-resin system, avoid resin agglomeration and clogging of the filter membrane due to excessively low temperature, and improve the stability of the filtration flow rate.

[0024] Working principle:

[0025] The xylene solvent-based aqueous resin to be filtered enters the bottom of the filter box 1 through the inlet pipe 3, driven by the high-pressure feed pump 4. Under pressure, the liquid permeates from the outside to the inside: firstly, it passes through the primary filter membrane 5 to intercept coarse-sized impurities, then through the secondary filter membrane 6 to intercept medium-sized impurities, and finally through the tertiary filter membrane 7 to intercept fine-sized impurities. The filtered clean resin gathers inside the tertiary filter membrane 7 and is discharged to the next process through the outlet pipe 9 and the outlet valve 10.

[0026] When the hydraulic sensor 20 detects that the pressure is too high, close the outlet valve 10 and open the air inlet valve 13. Compressed air is blown into the inside of the tertiary filter membrane 7 through the air inlet pipe 11 and the guide pipe 12. The gas penetrates the tertiary filter membrane 7, the secondary filter membrane 6, and the primary filter membrane 5 in the reverse direction, blowing the attached impurities off to the gap areas. After cleaning, close the air inlet valve 13 and open the corresponding cleaning door to discharge the impurities. If necessary, the box cover 2 can be opened and the impurities in the filter box 1 can be manually discharged from the cleaning doors.

[0027] The heat transfer oil enters the heating jacket cavity 101 through the heat transfer oil injection pipe 21 to maintain the temperature inside the filter box 1 and ensure the viscosity of the resin system is stable. After filtration, the heat transfer oil flows back through the heat transfer oil discharge pipe 22.

[0028] This invention solves the problems of membrane swelling and high-pressure damage under xylene systems by using a three-stage coaxial polyvinylidene fluoride filter membrane design combined with a polypropylene support mesh. The clear pore size gradient and step-by-step filtration structure significantly improve filtration accuracy. The reverse air blowing and graded cleaning gate design enables online cleaning of the filter membrane and convenient handling of impurities. Combined with pressure monitoring, temperature control, and a safety pressure relief structure, the stability and safety of the filtration process are further guaranteed, meeting the purity and production efficiency requirements of high-quality water-based resins.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water-based resin synthesis treatment filtration and impurity removal device, characterized in that: The filter includes a filter box (1) and a cover (2) that is detachably installed on the top of the filter box (1). A liquid inlet pipe (3) is provided on one side of the bottom of the filter box (1). A high-pressure feed pump (4) is installed on the liquid inlet pipe (3). A primary filter assembly, a secondary filter assembly, and a tertiary filter assembly are provided inside the filter box (1). The primary filter assembly, the secondary filter assembly, and the tertiary filter assembly each include a primary filter membrane (5), a secondary filter membrane (6), and a tertiary filter membrane (7) arranged in a cylindrical shape. The primary filter membrane (5), the secondary filter membrane (6), and the tertiary filter membrane (7) are coaxial. The secondary filter membrane (6) is located outside the tertiary filter membrane (7), and the primary filter membrane (5) is located outside the secondary filter membrane (6). The primary filter membrane (5), secondary filter membrane (6) and tertiary filter membrane (7) are all made of polyvinylidene fluoride. The inner sides of the primary filter membrane (5), secondary filter membrane (6) and tertiary filter membrane (7) are all fixedly connected with polypropylene support mesh (8). The bottom of the filter box (1) is provided with a liquid outlet pipe (9), and a liquid outlet valve (10) is installed on the liquid outlet pipe (9). The liquid outlet pipe (9) is located inside the tertiary filter membrane (7).

2. The water-based resin synthesis treatment filtration and impurity removal device as described in claim 1, characterized in that: The pore size of the secondary filter membrane (6) is smaller than that of the primary filter membrane (5), and the pore size of the tertiary filter membrane (7) is smaller than that of the secondary filter membrane (6).

3. The water-based resin synthesis treatment filtration and impurity removal device as described in claim 1, characterized in that: An air inlet pipe (11) is connected to the cover (2). The air inlet pipe (11) extends to the bottom of the cover (2) and is connected to a guide pipe (12). The guide pipe (12) is vertically arranged inside the three-stage filter membrane (7). An air inlet valve (13) is installed on the air inlet pipe (11).

4. The water-based resin synthesis treatment filtration and impurity removal device as described in claim 3, characterized in that: The bottom of the filter box (1) is provided with a first cleaning door (14), a second cleaning door (15) and a third cleaning door (16). The first cleaning door (14) is located between the primary filter membrane (5) and the inner wall of the filter box (1). The second cleaning door (15) is located between the primary filter membrane (5) and the secondary filter membrane (6). The third cleaning door (16) is located between the secondary filter membrane (6) and the tertiary filter membrane (7).

5. The water-based resin synthesis treatment filtration and impurity removal device as described in claim 3, characterized in that: A pressure sensor (17) is installed inside the guide pipe (12), and an exhaust pipe (18) is connected to the cover (2). A pressure relief valve (19) is installed on the exhaust pipe (18).

6. The water-based resin synthesis treatment filtration and impurity removal device as described in claim 1, characterized in that: A hydraulic sensor (20) is installed on the inner wall of the filter box (1).

7. The water-based resin synthesis treatment filtration and impurity removal device as described in claim 1, characterized in that: The filter box (1) has a heating jacket cavity (101) inside its side wall, and the filter box (1) is provided with a heat transfer oil injection pipe (21) and a heat transfer oil discharge pipe (22) connected to the heating jacket cavity (101).

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