A DMAC separation device and process

Abstract

The invention relates to the field of separation technology, and specifically discloses a DMAC separation device. A substrate can move up and down in a tank body. Two mounting cylinders are arranged at intervals on one side of the substrate. A winding roller is rotatably mounted in the mounting cylinder. Adjustment components are respectively arranged on opposite sides of the mounting cylinder along the axial direction. The adjustment components include an adjustment block, a slide bar and an adjustment rod group installed on the adjustment block. The slide bar is slidably connected with the adjustment block and can move up and down. Two ends of a filter membrane along its length direction are respectively rolled on two winding rollers. Two ends of the filter membrane along its width direction are respectively matched with the corresponding adjustment components. The slide bar and the adjustment rod group can shape the end of the filter membrane along its width direction into a concave shape. A retaining frame is arranged on one side of the substrate and is located between the two mounting cylinders. The retaining frame abuts against the upper end surface of the filter membrane so that a concave portion appears on the upper end surface of the filter membrane. The invention is conducive to better separation of impurities in a DMAC solution.

Description

Technical Field

[0001] The present invention relates to the field of separation technology, and in particular to a DMAC separation device and process. Background Art

[0002] DMAC is often used as a non-protonic polar solvent. DMAC is a colorless, transparent liquid that is flammable and can be mixed with organic solvents such as water, alcohol, ether, ester, benzene, chloroform and aromatic compounds. DMAC is used to make drugs and synthetic resins. It is also used as a solvent for polyacrylonitrile spinning and an extractive distillation solvent for separating styrene from the carbon eight fraction. DMAC is prepared by the reaction of dimethylamine with acetyl chloride.

[0003] The Chinese patent with the publication number CN218485644U discloses a separation device for separating suspended matter in a DMAC solution, comprising a first filter and a second filter, wherein the top of the first filter and the top of the second filter are both fixedly connected with a first sewage pipe, and the tops of the two first sewage pipes are both fixedly connected with a connecting whole pipe, and the arc surface on one side of the top of the first filter and the arc surface on the top of the second filter are both provided with a first feed pipe. The separation device for separating suspended matter in a DMAC solution separates suspended impurities in the DMAC solvent by filtering the DMAC solvent with a ceramic membrane filter element. The DMAC stock solution enters the interior of the first filter through the second feed pipe through the second three-way pipe, and penetrates the ceramic membrane surface of the filter element under the drive of the feed pressure. The micropores on the ceramic membrane surface retain the suspended impurities in the solvent on the feed side, and the dialysate flows out through the dialysate outlet of the device. Due to the limitation of the characteristics of the DMAC solvent, the filter adopts the form of double filters backwashing each other for regular reverse cleaning, that is, the dialysate of the first filter enters the filter from the dialysate outlet of the second filter to achieve the purpose of reverse cleaning.

[0004] However, the above technology uses full-flow filtration to separate fiber impurities in the DMAC solvent, and cleans the ceramic membrane by reverse cleaning, which causes the impurities trapped on the feed side to be backwashed and enter the inner cavity of the ceramic membrane, thereby affecting the separation effect of the impurities. Summary of the invention

[0005] The invention provides a DMAC separation device and process, aiming to solve the problem in the related art that it is difficult to better separate impurities in a DMAC solution.

[0006] A DMAC separation device comprises a tank body, a substrate, a filter membrane and a holder, wherein the substrate can move up and down in the tank body, two mounting cylinders are arranged at intervals on one side of the substrate, a winding roller is rotatably mounted in the mounting cylinder, and adjustment components are respectively arranged on opposite sides of the mounting cylinder along its axial direction, wherein the adjustment component comprises an adjustment block, a slide bar and an adjustment rod group mounted on the adjustment block, wherein the slide bar is slidably connected with the adjustment block and can move up and down; the two ends of the filter membrane along its length direction are respectively rolled on the two winding rollers, and the two ends of the filter membrane along its width direction are respectively matched with the corresponding adjustment components, and the slide bar and the adjustment rod group can shape the end of the filter membrane along its width direction into a concave shape; the holder is arranged on one side of the substrate and located between the two mounting cylinders, and the holder is stopped against the upper end surface of the filter membrane so that a concave portion appears on the upper end surface of the filter membrane. The present invention enables the filter membrane to present a concave state by arranging the adjustment component and the holder, thereby facilitating the collection of impurities, and the filter membrane is mounted on the two winding rollers for easy replacement of the filter membrane.

[0007] Preferably, the adjusting rod group includes a first rod, a second rod, a third rod and a fourth rod, the first rod is close to the corresponding winding roller, the sliding rod is located on the side of the first rod away from the corresponding winding roller, the second rod is located below the sliding rod, the third rod is located on the side of the sliding rod away from the first rod, the fourth rod is located above the third rod, and the first rod and the third rod are respectively located above the second rod, the effect of which is that the adjusting rod group can shape the end of the filter membrane along its width direction into a concave shape so as to separate impurities from the solution.

[0008] Preferably, when one end of the filter membrane leaves the mounting cylinder from the winding roller in one of the mounting cylinders, the end of the filter membrane along its width direction passes in sequence over the first rod in the adjustment assembly in the mounting cylinder, between the sliding rod and the second rod, and between the third rod and the fourth rod.

[0009] Preferably, when one end of the filter membrane leaves one of the mounting cylinders and is wound on a winding roller in another mounting cylinder, the end of the filter membrane along its width direction will sequentially pass between the third rod and the fourth rod, between the sliding rod and the second rod, and above the first rod in the adjustment assembly in the other mounting cylinder, thereby having the effect of shaping the four ends of the filter membrane through the four adjustment rod groups so that the filter membrane can be in a concave state.

[0010] Preferably, the axes of the two winding rollers are parallel to each other, the adjustment block can move along the axis direction of the winding roller, and the edges of the two adjustment blocks in the mounting tube on opposite sides respectively have guide parts, the effect of which is that the guide parts of the two adjustment blocks in the mounting tube respectively stop at the end parts of the filter membrane along its width direction, so that the middle part of the filter membrane located between the two mounting tubes has room for extension along its width extension direction, so that the filter membrane can be in a concave state.

[0011] Preferably, the two mounting tubes have matching holes for the filter membrane to pass through on opposite sides respectively, a cover plate is installed on the mounting tube, and a drainage hole is provided at the bottom of the mounting tube.

[0012] Preferably, the retaining frame includes a support rod and two top rods installed at one end of the support rod away from the base plate, the top rod is rotatably connected to the support rod through elastic member 2, and the end of the top rod away from the support rod has a roller, which has the effect that the two rollers can always stop against the upper end surface of the filter membrane, so that a recessed portion appears on the upper end surface of the filter membrane, and the recessed portion can be in a tensioned state.

[0013] Preferably, a process for a DMAC separation device comprises the following steps:

[0014] S1: Adjust the angle of the substrate so that the filter membrane between the two mounting cylinders is in a tilted downward state, and control the substrate to slowly move downward so that the filter membrane enters the solution and moves to the inner bottom end of the tank;

[0015] S2: Adjust the angle of the substrate so that the filter membrane between the two mounting cylinders is in a horizontal state, and control the substrate to slowly move upward so that impurities in the solution are collected by the filter membrane;

[0016] S3: Adjust the position of the substrate in the tank, repeat S1 and S2, and when the filter membrane between the two installation cylinders loses its filtering ability, drive the two winding rollers to rotate to replace the filter membrane between the two installation cylinders;

[0017] S4: Repeat S3 until the impurities in the solution are completely collected. The present invention can control the movement of the substrate to enable the filter membrane to separate the impurities in the solution, replace the filter membrane that has lost its filtering ability, and prevent the collected impurities from being mixed into the solution again.

[0018] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: by arranging the adjustment component and the retaining frame, the filter membrane located between the two mounting cylinders can be in a concave state, and the degree of the concave portion can be changed as needed, thereby facilitating the separation of impurities in the solution, and the filter membrane that has lost its filtering ability can be replaced by controlling the rotation of the winding roller. Since the winding roller will apply a certain tensioning force to the filter membrane, impurities on the filter membrane that has lost its filtering ability will not enter the solution again, and the residual solution on the filter membrane that has lost its filtering ability will flow downwardly back to the tank body through the drainage hole, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a cross-sectional view of the tank body of the present invention.

[0021] Figure 3 It is a schematic diagram of the coordination of the substrate, the mounting tube and the filter membrane of the present invention.

[0022] Figure 4 This is a cross-sectional view of the installation of the cartridge, support rods and filter membrane according to the present invention.

[0023] Figure 5 It is a schematic diagram of the cooperation of the sliding rod, the first rod, the second rod, the third rod and the fourth rod of the present invention.

[0024] Figure numerals: 10, tank body; 11, robotic arm; 20, substrate; 30, mounting cylinder; 301, drainage hole; 31, winding roller; 32, adjusting block; 321, guide part; 33, sliding rod; 34, first rod; 35, second rod; 36, third rod; 37, fourth rod; 38, cover plate; 40, filter membrane; 51, support rod; 52, top rod; 521, roller. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] like Figure 1-Figure 5As shown, a DMAC separation device includes a tank body 10, a substrate 20 is arranged in the tank body 10, and a mechanical arm 11 for controlling the movement of the substrate 20 in the tank body 10 is installed at the top of the tank body 10, wherein the mechanical arm 11 is a prior art and will not be described in detail here. The mechanical arm 11 can control the substrate 20 to move up and down in the tank body 10, and can change the inclination angle of the substrate 20 in the tank body 10, and two installation cylinders 30 are arranged at one side of the substrate 20 at intervals, and the axes of the two installation cylinders 30 are parallel to each other. A winding roller 31 is coaxially rotatably installed in 30, a motor for controlling the rotation of the winding roller 31 is installed in the base plate 20, a filter membrane 40 is arranged on the base plate 20, the filter membrane 40 is made of polyvinylidene fluoride material, and the two ends of the filter membrane 40 along its length direction are respectively wound on the two winding rollers 31, and the opposite sides of the two mounting cylinders 30 respectively have matching holes for the filter membrane 40 to pass through, a cover plate 38 is rotatably installed on the mounting cylinder 30 through an elastic member 1, the elastic member 1 is specifically a torsion spring 1, and the bottom of the mounting cylinder 30 has a drainage hole 301.

[0027] Adjustment components are respectively provided on opposite sides of the mounting cylinder 30 along its axial direction. The adjustment components include an adjustment block 32, a slide rod 33 and an adjustment rod group installed on the adjustment block 32. The adjustment block 32 can move along the axial direction of the winding roller 31. The edges of the two adjustment blocks 32 on opposite sides of the mounting cylinder 30 respectively have guide portions 321. An electric push rod 1 for controlling the movement of the adjustment block 32 is installed in the mounting cylinder 30. The slide rod 33 is slidably connected to the adjustment block 32. The electric push rod 2 for moving the rod 33 up and down, the adjusting rod group includes a first rod 34, a second rod 35, a third rod 36 and a fourth rod 37. The first rod 34 is close to the corresponding winding roller 31, the sliding rod 33 is located on the side of the first rod 34 away from the corresponding winding roller 31, the second rod 35 is located below the sliding rod 33, the third rod 36 is located on the side of the sliding rod 33 away from the first rod 34, the fourth rod 37 is located above the third rod 36, and the first rod 34 and the third rod 36 are respectively located above the second rod 35.

[0028] When one end of the filter membrane 40 leaves the installation tube 30 from the winding roller 31 in one of the installation tubes 30, the end of the filter membrane 40 along the width direction passes through the top of the first rod 34, between the sliding rod 33 and the second rod 35, and between the third rod 36 and the fourth rod 37 in the adjustment assembly in the installation tube 30 in sequence. The sliding rod 33 and the adjustment rod group can shape the end of the filter membrane 40 along the width direction into a concave shape, and the fourth rod 37 and the third rod 36 are respectively in close contact with the upper and lower ends of the filter membrane 40; When one end leaves one of the mounting tubes 30 and is wound on the winding roller 31 in the other mounting tube 30, the end of the filter membrane 40 along its width direction will pass in sequence between the third rod 36 and the fourth rod 37 in the adjustment assembly in the other mounting tube 30, between the sliding rod 33 and the second rod 35, and above the first rod 34. The sliding rod 33 and the adjustment rod group can shape the end of the filter membrane 40 along its width direction into a concave shape, and the fourth rod 37 and the third rod 36 are respectively in close contact with the upper and lower ends of the filter membrane 40.

[0029] like Figure 2-Figure 5 As shown, a retaining frame is installed on one side of the substrate 20, and the retaining frame is located between the two mounting tubes 30. The retaining frame includes a support rod 51 and two top rods 52 installed at one end of the support rod 51 away from the substrate 20. The top rod 52 is rotatably connected to the support rod 51 through an elastic member 2. The elastic member 2 is specifically a torsion spring 2. In the initial state, the ends of the two top rods 52 away from the support rod 51 are away from each other. Under the action of the elastic member 2, the ends of the two top rods 52 away from the support rod 51 have a tendency to approach each other. When the substrate 20 is in a horizontal state, the angles between the two top rods 52 and the vertical plane are always equal. The end of the top rod 52 away from the support rod 51 has a roller 521, and the two rollers 521 are respectively stopped against the upper end surface of the filter membrane 40.

[0030] It should be noted that the filter membrane 40 is in a tensioned state between the two winding rollers 31. Since the ends of the filter membrane 40 along its width direction are formed into a concave shape by the sliding rod 33 and the adjusting rod, the middle part of the filter membrane 40 located between the two mounting cylinders 30 has room for extension along its length extension direction. The guide parts 321 of the two adjusting blocks 32 in the mounting cylinder 30 respectively stop at the ends of the filter membrane 40 along its width direction. Therefore, the middle part of the filter membrane 40 located between the two mounting cylinders 30 has room for extension along its width extension direction. Under the action of the second elastic member, the two rollers 521 respectively stop at the upper end surface of the filter membrane 40, a concave portion will appear on the upper end surface of the filter membrane 40, and the concave portion is in a tensioned state, so that the concave portion is convenient for collecting impurities in the solution.

[0031] It can be understood that by controlling the slide rod 33 to move downward and gradually approach the second rod 35, and controlling the two adjustment blocks 32 in the mounting tube 30 to approach each other, the degree of depression of the lower recess can be increased, thereby improving the effect of the lower recess on collecting impurities in the solution.

[0032] Specific working principle: Reference Figure 1-Figure 5 First, the angle of the substrate 20 is adjusted by the robotic arm 11 so that the filter membrane 40 between the two mounting tubes 30 is in a tilted downward state, and then the substrate 20 is controlled to move slowly downward so that the filter membrane 40 enters the solution and moves to the inner bottom end of the tank body 10, and then the angle of the substrate 20 is adjusted so that the filter membrane 40 between the two mounting tubes 30 is in a horizontal state, and then the substrate 20 is controlled to move slowly upward so that impurities in the solution are collected by the concave part of the filter membrane 40.

[0033] When the substrate 20 moves above the liquid surface, the position of the substrate 20 in the tank body 10 is adjusted, and then the above steps are repeated. When the filter membrane 40 between the two mounting cylinders 30 loses its filtering ability, the two winding rollers 31 are driven to rotate so that one of the winding rollers 31 releases a new section of the filter membrane 40, and the other winding roller 31 winds up the filter membrane 40 that has lost its filtering ability, thereby completing the replacement of the filter membrane 40 between the two mounting cylinders 30.

[0034] Then continue to repeat the above steps until the impurities in the solution are completely collected. It should be noted that when another winding roller 31 winds up the filter membrane 40 that has lost its filtering ability, since the winding roller 31 will apply a certain tension to the filter membrane 40, the impurities on the filter membrane 40 that has lost its filtering ability will not enter the solution again, and the residual solution on the filter membrane 40 that has lost its filtering ability will flow back to the tank body 10 through the drainage hole 301. When the filter membrane 40 is used up, it can be replaced with a new filter membrane 40 by opening the cover 38.

[0035] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A DMAC separation device, comprising a tank, characterized in that: Also includes: A base plate is capable of moving up and down in the tank body, two installation cylinders are arranged at intervals on one side of the base plate, a winding roller is rotatably installed in the installation cylinder, and adjustment components are respectively arranged on opposite sides of the installation cylinder along its axial direction, and the adjustment components include an adjustment block, a slide rod, and an adjustment rod group installed on the adjustment block, and the slide rod is slidably connected to the adjustment block and can move up and down; An electric push rod 1 for controlling the movement of the adjustment block is installed in the installation cylinder; The filter membrane, the two ends of the filter membrane along the length direction are respectively rolled on the two winding rollers, the two ends of the filter membrane along the width direction are respectively matched with the corresponding adjustment components, and the sliding rod and the adjustment rod group can shape the ends of the filter membrane along the width direction into a concave shape; A retainer is provided on one side of the base plate and between the two mounting tubes, the retainer abuts against the upper end surface of the filter membrane so that a concave portion appears on the upper end surface of the filter membrane, and comprises a support rod and two push rods installed at one end of the support rod away from the base plate, the push rod is rotatably connected to the support rod through an elastic member 2, and the push rod has a roller at one end away from the support rod; The adjusting rod group includes a first rod, a second rod, a third rod and a fourth rod, the first rod is close to the corresponding winding roller, the sliding rod is located on the side of the first rod away from the corresponding winding roller, the second rod is located below the sliding rod, the third rod is located on the side of the sliding rod away from the first rod, the fourth rod is located above the third rod, and the first rod and the third rod are respectively located above the second rod; When one end of the filter membrane leaves the installation cylinder from the winding roller in one of the installation cylinders, the end of the filter membrane along the width direction passes in sequence from above the first rod, between the sliding rod and the second rod, and between the third rod and the fourth rod in the adjustment assembly in the installation cylinder; When one end of the filter membrane leaves one of the mounting tubes and is wound on the winding roller in the other mounting tube, the end of the filter membrane along its width direction will successively pass between the third rod and the fourth rod, between the sliding rod and the second rod, and above the first rod in the adjustment assembly in the other mounting tube.

2. A DMAC separation device according to claim 1, characterized in that: The axes of the two winding rollers are parallel to each other, the adjustment block can move along the axis direction of the winding roller, and the edges of the two adjustment blocks on opposite sides in the installation cylinder are respectively provided with guide parts.

3. A DMAC separation device according to claim 1, characterized in that: The two installation cylinders have matching holes for the filter membrane to pass through on opposite sides thereof, a cover plate is installed on the installation cylinder, and a drainage hole is provided at the bottom of the installation cylinder.

4. A process based on the DMAC separation device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: Adjust the angle of the substrate so that the filter membrane between the two mounting cylinders is in a tilted downward state, and control the substrate to slowly move downward so that the filter membrane enters the solution and moves to the inner bottom end of the tank; S2: Adjust the angle of the substrate so that the filter membrane between the two mounting cylinders is in a horizontal state, and control the substrate to slowly move upward so that impurities in the solution are collected by the filter membrane; S3: Adjust the position of the substrate in the tank, repeat S1 and S2, and when the filter membrane between the two installation cylinders loses its filtering ability, drive the two winding rollers to rotate to replace the filter membrane between the two installation cylinders; S4: Repeat S3 until the impurities in the solution are completely collected.

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