Demulsification device for phenolic resin separation

Abstract

The utility model provides a demulsification device for phenolic resin separation, which comprises a first demulsification tank, a first filtering tank, a second demulsification tank and a second filtering tank which are sequentially connected, the top of the first demulsification tank is connected with the first filtering tank, the first filtering tank is connected with the second demulsification tank, the second demulsification tank is connected with the second filtering tank, and the first filtering tank is connected with the second filtering tank. Filtering membrane layers are arranged in the first filtering tank and the second filtering tank, the first demulsification tank comprises an outer cavity and a plurality of conical inner cavities arranged in the outer cavity, a hydraulic rotator is arranged at the bottom of each conical inner cavity, and a flocculation solution pipeline is arranged at the top of the second demulsification tank; primary demulsification separation of phenolic resin and water is achieved through the first demulsification tank, then primary flocculation is carried out in the second filtering tank, equivalently, two times of demulsification are carried out, the primary demulsification adopts a physical cyclone separation principle, the secondary demulsification adopts a physical and chemical principle, demulsification is thoroughly achieved through an emulsion layer, and the demulsification efficiency is improved. The emulsion layer is subjected to filtering treatment after being demulsified every time.

Description

Technical Field

[0001] The utility model relates to the technical field of phenolic resin production devices, in particular to a demulsification device used for phenolic resin separation. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] During the synthesis of special electronic phenolic resins, due to the emulsification phenomenon, the aqueous phase and the phenolic resin will form a stable emulsion layer, resulting in the reaction system being finally divided into three phases: the upper aqueous phase, the lower resin phase, and the middle emulsion layer. Among them, the emulsion layer contains the target product phenolic resin, but due to its special physical state, it is difficult to achieve effective separation by conventional methods. If the emulsion layer is directly recycled into the resin phase, the impurity content of the product will increase, affecting the purity of the product; if it is discarded, it will cause the loss of the target product and reduce the overall yield; this technical problem urgently needs to be solved through process optimization or separation technology improvement. Utility Model Content

[0004] In view of the above defects or improvement needs of the prior art, the utility model provides a demulsification device for separating phenolic resin, which can realize the initial demulsification and separation of phenolic resin and water through a first demulsification tank, and perform a flocculation process after the initial demulsification of the emulsified layer, which is equivalent to performing demulsification twice. The initial demulsification adopts the principle of physical cyclone separation, and the secondary demulsification adopts the principle of both physics and chemistry, so that the emulsified layer can be completely demulsified, and the emulsified layer will be filtered after each demulsification treatment, so that the separation of water and phenolic resin is more thorough.

[0005] The utility model provides a demulsification device for separating phenolic resin, comprising a first demulsification tank, a first filtering tank, a second demulsification tank and a second filtering tank which are connected in sequence, wherein the top of the first demulsification tank is connected to the top of the first filtering tank through a pipeline, the bottom of the first filtering tank is connected to the top of the second demulsification tank through a pipeline, the bottom of the second demulsification tank is connected to the top of the second filtering tank, a first filtering membrane layer is arranged inside the first filtering tank, and a second filtering membrane layer is arranged inside the second filtering tank.

[0006] The first demulsification tank comprises an outer cavity and a plurality of conical inner cavities arranged inside the outer cavity. A hydraulic rotator is arranged at the bottom of each conical inner cavity. The liquid outlet end of the hydraulic rotator is arranged along the tangent direction of the conical inner cavity. An emulsion pipeline is arranged on the bottom side wall of the first demulsification tank. The hydraulic rotator is connected to the emulsion pipeline. A rectifier plate is arranged on the top of the conical inner cavity, a top overflow port is arranged on the top of the outer cavity, and a drain pipe is also arranged at the bottom of the outer cavity.

[0007] A flocculation solution pipeline is provided on the top of the second demulsification tank, a stirring device is provided inside the second demulsification tank, a heating jacket is provided on the outer wall of the second demulsification tank, a heating medium inlet pipeline is connected to the bottom of the heating jacket, and a heating medium discharge pipeline is connected to the top of the heating jacket.

[0008] Preferably, the hydraulic rotator includes a vertical water support pipe and four bent outlets, the vertical water support pipe is connected to the emulsion pipeline, the four bent outlets are circumferentially fixedly installed on the top of the vertical water support pipe, and the interval angle between any bent outlet and the adjacent bent outlet is 90 degrees.

[0009] Preferably, the four bent outlets of the same conical inner cavity are all located on the same horizontal rotation plane.

[0010] Preferably, the conical inner cavity is coaxially arranged with the first demulsification tank body, the bottom area of ​​the upper positive cone section of the conical inner cavity is larger than the top area, and the space of the entire conical inner cavity will experience a change from small to large to small along the direction from bottom to top.

[0011] Preferably, a plurality of evenly arranged spoilers are provided on the inner wall of the second demulsification tank.

[0012] Preferably, the spoiler is arranged obliquely upward along an end away from the inner wall of the second demulsification tank.

[0013] Preferably, the rectifying plate is provided with a plurality of channels extending in a direction parallel to the axis of the conical inner cavity.

[0014] Preferably, two ends of the first filter membrane layer are respectively embedded in the inner wall of the first filter tank, and the first filter membrane layer is tiltedly arranged in the first filter tank.

[0015] Preferably, both ends of the second filter membrane layer are respectively embedded in the inner wall of the second filter tank, and the second filter membrane layer is tiltedly arranged in the second filter tank.

[0016] Preferably, the flocculation solution pipeline and the emulsion pipeline are both provided with control valves and flow meters.

[0017] With one or more of the above technical solutions, the utility model has the following beneficial effects:

[0018] 1. The first demulsifier of the utility model is provided with a conical inner cavity and a hydraulic rotator. Since phenolic resin is insoluble in water and the liquid outlet end of the hydraulic rotator is arranged along the tangent direction of the conical inner cavity, the fluid content of the fluid entering the inner cavity at any point in the same cross section will not differ too much, thereby generating a more stable cyclone field. During the cyclone movement of the fluid, the bubbles and the phenolic resin will collide and adhere more in the conical inner cavity, and the volume of the adhered body will increase, which is conducive to the aggregation and separation of the bubbles and the phenolic resin.

[0019] 2. The utility model uses the second demulsification tank to flocculate the emulsified layer. The flocculation process adopts a combination of physical and chemical methods, combining the physical methods of stirring and heating with the chemical method of adding flocculants to completely demulsify the polymer emulsion.

[0020] 3. The structure of arranging multiple inner cavities in the outer cavity and the arrangement of multiple inner cavities improve the efficiency of the initial demulsification and separation of water and phenolic resin.

[0021] 4. Each hydraulic rotator is provided with 4 bent outlets, and a control valve and a flow meter are provided on the emulsion pipeline. While ensuring uniform distribution of the fluid in the conical inner cavity, the opening of the control valve can be adjusted according to the incoming liquid flow rate, thereby ensuring the flow velocity at the bent outlet to maintain the stability of the cyclone field in the conical inner cavity, solving the problem of maintaining the cyclone field at low flow rates.

[0022] 5. The rectifying plate can hinder the rotational flow of the fluid at the top of the conical inner cavity. The rectifying plate is provided with a plurality of channels extending in a direction parallel to the axis of the conical inner cavity. The rotational motion of the fluid in the conical inner cavity can be converted into a stable axial flow through the channels on the rectifying plate, so that the fluid flowing out of the conical inner cavity flows upward uniformly in a mutually parallel posture, completely avoiding the occurrence of secondary emulsification in the outer space of the conical inner cavity.

[0023] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0025] Figure 1 This is a schematic diagram of the overall structure of the demulsification device of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the first demulsifier tank of the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the first filter tank of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the second demulsifier tank of the utility model;

[0029] Figure 5 This is a schematic diagram of the overall structure of the second filter tank of the utility model;

[0030] Figure 6It is a schematic diagram of the overall structure of the hydraulic rotator of the utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the conical inner cavity of the utility model;

[0032] Among them, 1. the first demulsification tank, 2. the first filter tank, 3. the second demulsification tank, 4. the second filter tank, 5. the first filter membrane layer, 6. the second filter membrane layer, 7. the outer cavity, 8. the conical inner cavity, 9. the hydraulic rotator, 10. the emulsion pipeline, 11. the rectifier, 12. the top overflow port, 13. the drain pipe, 14. the upper small cone section, 15. the vertical water support pipe, 16. the bent outlet, 17. the control valve, 18. the flocculation solution pipeline, 19. the stirring device, 20. the heating jacket, 21. the heating medium inlet pipeline, 22. the heating medium outlet pipeline, 23. the spoiler, 24. the lower small cone section, 25. the middle large positive cone section, 26. the top cylindrical section, 27. the partition, 28. the frame, 29. the flow meter, 30. the channel. DETAILED DESCRIPTION

[0033] It should be noted that the following detailed descriptions are exemplary and are intended to provide further description of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. In the absence of conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0035] Embodiment 1

[0036] like Figure 1 As shown, this embodiment provides a demulsification device for separating phenolic resin, which includes a first demulsification tank 1, a first filter tank 2, a second demulsification tank 3 and a second filter tank 4 connected in sequence, the top of the first demulsification tank 1 is connected to the top of the first filter tank 2 through a pipeline, the bottom of the first filter tank 2 is connected to the top of the second demulsification tank 3 through a pipeline, the bottom of the second demulsification tank 3 is connected to the top of the second filter tank 4, the first filter tank 2 is provided with a first filter membrane layer 5, and the second filter tank 4 is provided with a second filter membrane layer 6.

[0037] like Figure 2As shown, the first demulsification tank 1 includes an outer cavity 7 and a plurality of conical inner cavities 8 arranged inside the outer cavity 7. A hydraulic rotator 9 is arranged at the bottom of each conical inner cavity 8. The liquid outlet end of the hydraulic rotator 9 is arranged along the tangent direction of the conical inner cavity 8. An emulsion pipeline 10 is arranged on the bottom side wall of the first demulsification tank 1. The hydraulic rotator 9 is connected to the emulsion pipeline 10. A rectifying plate 11 is arranged at the top of the conical inner cavity 8, a top overflow port 12 is arranged at the top of the outer cavity 7, and a drain pipe 13 is also arranged at the bottom of the outer cavity 7.

[0038] A conical inner cavity 8 is coaxially arranged inside the first demulsifier 1. Along the direction from bottom to top, the bottom end area of ​​the upper small cone section 14 of the conical inner cavity 8 is larger than the top end area. Along the direction from bottom to top, the space of the entire conical inner cavity 8 will experience a change form of small-flat-small, and is divided into a lower small cone section 24, a middle large positive cone section 25 and an upper small cone section 14 from bottom to top. The middle large positive cone section 25 and the upper small cone section 14 of the conical inner cavity 8 serve as vortex generating areas and are the main areas where phenolic resin and bubbles collide and adhere.

[0039] like Figure 1 , Figure 6 and Figure 7 As shown, the hydraulic rotator 9 in this embodiment includes a vertical water support pipe 15 and four bent outlets 16, the four bent outlets 16 are circumferentially fixedly installed on the top of the vertical water support pipe 15, the vertical water support pipe 15 is connected to the emulsion pipeline 10, and the interval angle between any bent outlet 16 and the adjacent bent outlet 16 is 90 degrees. The four bent outlets 16 of the same conical inner cavity 8 are all located on the same rotation horizontal plane. At the same cross-section of any conical inner cavity 8, only relying on the four bent outlets 16 can make the fluid flowing out from the liquid outlet end of the hydraulic rotator 9 evenly distribute over the entire cross-section, ensuring that the fluid is evenly distributed in the lower layer of the conical inner cavity 8.

[0040] The upper small conical section 14 of the conical inner cavity 8 serves as the main centrifugal separation area. The continuously shrinking cross-sectional area can increase the cyclonic field intensity. In this embodiment, the smaller the cross-sectional area of ​​the vortex generating area, the higher the speed of the fluid when passing through the vortex generating area, and the better the separation effect of the phenolic resin under the action of centripetal force and centrifugal force. Due to the centrifugal effect and the bubble effect of the gas, the water with higher density moves toward the inner wall of the conical inner cavity 8, while the lighter components such as the bubble-phenolic adherents produce radial inward relative migration. The bubble-phenolic adherents rise to the upper end of the conical inner cavity 8 due to the cyclonic effect and flow out at the upper end.

[0041] The water inlet method adopted in this embodiment avoids complex pipeline arrangement, making the device more compact and simple. The bent outlets 16 inside each conical inner cavity 8 are evenly distributed and the water outlet end of the bent outlet 16 is tangent to the wall of the conical inner cavity 8, which can produce a uniform and stable flow field and achieve uniform distribution of liquid and gas inside the conical inner cavity 8.

[0042] In order to ensure that the fluid is evenly distributed in the conical inner cavity 8 and the opening of the control valve can be adjusted according to the incoming liquid flow rate, a control valve 17 is further provided on the emulsion pipeline 10 in this embodiment. The flow rate of the bent outlet 16 inside each conical inner cavity 8 can be uniformly adjusted by adjusting the opening of the control valve 17, so that the first demulsification tank 1 has a wider flow adjustment range, and the stability of the vortex field in the conical inner cavity 8 is maintained by effectively controlling the flow rate of the bent outlet 16, thereby solving the problem of maintaining the vortex field at low flow rates.

[0043] In this embodiment, the mixed liquid containing phenolic resin is first mixed with the microbubbles generated by the autolytic air pump, and the microbubbles are released to further mix and adhere with the phenolic resin mixture, providing better conditions for the next step of oil-water separation. After the gas and the mixed liquid containing phenolic resin are mixed to form a new fluid, the fluid is then passed from the emulsion pipe 10 on the bottom side wall of the first demulsification tank 1 into the conical inner cavity 8.

[0044] The mixed liquid flows out from the liquid outlet end of multiple bent outlets 16. The bent outlets 16 enable a more stable cyclone field to be generated in the conical inner cavity 8. Under the action of the stable rotating gas field, the bubbles and the phenolic resin collide and adhere more in the conical inner cavity 8, and the volume of the adhered body increases, which is beneficial to the aggregation and separation of the bubbles and the phenolic resin. At the same time, since the mixture and the main phase (water) are separated under the action of the cyclone, the mixture moves closer to the middle, and the phenolic resin content in the external water is greatly reduced.

[0045] In order to ensure that the fluid flow rate flowing out from the top of the conical inner cavity 8 does not change significantly in the outer cavity 7, a rectifying plate 11 is arranged at the top of the conical inner cavity 8 in this embodiment. The outer peripheral surface of the rectifying plate 11 is fixed to the inner peripheral surface of the top cylindrical section 26 of the conical inner cavity 8. The plate body of the rectifying plate 11 is provided with a plurality of channels 30 extending in a direction parallel to the axis of the conical inner cavity 8. In this embodiment, the rectifying plate 11 includes a frame 28, and the frame 28 has a plurality of parallel partitions 27. The partitions 27 are parallel to the axis of the conical inner cavity 8. A channel 30 parallel to the axis of the conical inner cylinder of the conical inner cavity 8 is formed between every two partitions 27. There are several channels 30 for fluid to pass through. The rectifying plate 11 can be arranged in the form of a porous plate, a concentric plate or a serpentine plate, and the technicians in this field can arrange it according to actual needs.

[0046] Since the rectifying plate 11 is provided with a plurality of channels 30 extending in a direction parallel to the axis of the conical inner cavity 8, when the fluid inside the conical inner cavity 8 reaches the position of the rectifying plate 11, since the plurality of channels 30 inside the rectifying plate 11 in this embodiment are parallel to the axis of the conical inner cylinder of the conical inner cavity 8, the fluid will flow axially along the vertically upward channels 30, and the rotational motion of the fluid in the conical inner cavity 8 can be converted into a stable vertically upward axial flow through the channels 30 on the rectifying plate 11, so that the fluid flowing out of the conical inner cavity 8 flows upward uniformly in a mutually parallel manner, thereby improving the flow stability of the fluid in the conical inner cavity 8 and the external space, and the flow rate of the fluid flowing uniformly upward will not produce a large change, thereby avoiding the generation of secondary vortices in the external space of the conical inner cavity 8, ensuring the stable progress of the separation process, and also avoiding the secondary emulsification of the phenolic bubble adherents.

[0047] After the fluid containing phenolic resin passes through the conical inner cavity 8 for cyclone flotation separation, bubbles, phenolic resin and other adherent bodies will form a larger mixture when they pass through each rectifier plate 11 in the conical inner cavity 8 and hit the wall, which is beneficial to the separation of phenolic resin and water and avoids flowing out of the drain pipe from the outer cavity 7 with water. The phenolic resin and bubble adherent bodies are collected and discharged from the top overflow port 12, and clean water is discharged from the bottom drain port.

[0048] like Figure 3 As shown, in this embodiment, a first filter membrane layer 5 is arranged inside the first filter tank 2, and the number of the first filter membrane layers 5 is several. The two ends of the first filter membrane layer 5 are respectively embedded in the inner wall of the first filter tank 2, and the first filter membrane layer 5 is tilted in the first filter tank 2. Through the tilted first filter membrane layer 5, the large droplets flowing in from the first demulsification tank 1 can be filtered and precipitated in layers, and the phenolic resin can be preliminarily filtered and collected.

[0049] like Figure 4 As shown, since the solution obtained by filtering from the first filter tank 2 still contains residual polymer, the second demulsification tank 3 is provided in this embodiment, and a flocculation solution pipeline 18 is provided on the top of the second demulsification tank 3, and a stirring device 19 is provided inside the second demulsification tank 3. A heating jacket 20 is provided on the outer wall of the second demulsification tank 3, and a heating medium inlet pipeline 21 is connected to the bottom of the heating jacket 20, and a heating medium discharge pipeline 22 is connected to the top of the heating jacket 20. A heating liquid can be introduced into the heating jacket 20 through the heating medium inlet pipeline 21, and the fluid inside the second demulsification tank 3 is heated accordingly; in order to ensure the effect of secondary demulsification, the second demulsification tank 3 is also provided with a plurality of evenly arranged spoilers 23 on the inner wall of the second demulsification tank 3 in this embodiment, and the spoilers 23 are arranged obliquely upward along one end away from the inner wall of the second demulsification tank 3, and the stirring effect can be further improved by the spoilers 23, and it is conducive to sufficient mixing with the flocculant, and the demulsification effect is further improved.

[0050] In order to effectively control the content of the flocculation solution in the second demulsification tank 3 , a control valve 17 and a flow meter 29 are provided on the flocculation solution pipeline 18 .

[0051] The fluid after filtration treatment in the first filter tank 2 will enter the second demulsification tank 3 through the pipeline. At this time, the heating liquid can be introduced into the heating jacket 20 through the heating medium entering the pipeline 21, stirring and heating are started, and the prepared flocculant solution is added to the second demulsification tank 3 through the flocculation solution pipeline 18 on the top of the second demulsification tank 3. In this way, the fluid in the second demulsification tank 3 can be subjected to secondary demulsification treatment by both physical and chemical means. The fluid will flocculate in the second demulsification tank 3 to form an aggregated product, and flow from the bottom of the second demulsification tank 3 to the second filter tank 4.

[0052] like Figure 5 As shown, the internal structure of the second filter tank 4 in this embodiment is substantially the same as the internal structure of the first filter tank 2. A second filter membrane layer 6 is arranged inside the second filter tank 4. The number of second filter membrane layers 6 is several, and both ends of the second filter membrane layer 6 are respectively embedded in the inner wall of the second filter tank 4. The second filter membrane layer 6 is tilted in the second filter tank 4. The tilted second filter membrane layer 6 can filter and precipitate the large droplets flowing in from the second demulsification tank 3 in layers, and the phenolic resin can be filtered and collected for a secondary time.

[0053] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A demulsifier for separating phenolic resin, characterized in that: The invention comprises a first demulsification tank, a first filtering tank, a second demulsification tank and a second filtering tank which are connected in sequence, wherein the top of the demulsification tank is connected to the top of the first filtering tank through a pipeline, the bottom of the first filtering tank is connected to the top of the second demulsification tank through a pipeline, the bottom of the second demulsification tank is connected to the top of the second filtering tank, the first filtering tank is provided with a first filtering membrane layer inside, and the second filtering tank is provided with a second filtering membrane layer inside; The first demulsifier includes an outer cavity, and a plurality of conical inner cavities arranged inside the outer cavity. A hydraulic rotator is arranged at the bottom of each conical inner cavity, and the liquid outlet end of the hydraulic rotator is arranged along the tangent direction of the conical inner cavity. An emulsion pipeline is arranged on the bottom side wall of the first demulsifier, and the hydraulic rotator is connected to the emulsion pipeline. A rectifying plate is arranged at the top of the conical inner cavity, a top overflow port is arranged at the top of the outer cavity, and a drain pipe is also arranged at the bottom of the outer cavity; A flocculation solution pipeline is provided on the top of the second demulsification tank, a stirring device is provided inside the second demulsification tank, a heating jacket is provided on the outer wall of the second demulsification tank, a heating medium inlet pipeline is connected to the bottom of the heating jacket, and a heating medium discharge pipeline is connected to the top of the heating jacket.

2. A demulsification device for separation of phenolic resin according to claim 1, characterized in that: The hydraulic rotator includes a vertical water support pipe and four bent outlets, wherein the vertical water support pipe is connected to the emulsion pipeline, and the four bent outlets are circumferentially fixedly installed on the top of the vertical water support pipe, and the interval angle between any bent outlet and the adjacent bent outlet is 90 degrees.

3. A demulsification device for separation of phenolic resin according to claim 2, characterized in that: The four bending outlets of the same conical inner cavity are all located on the same rotational horizontal plane.

4. A demulsification device for separation of phenolic resin according to claim 1, characterized in that: The conical inner cavity is coaxially arranged with the demulsification tank body, the bottom end area of ​​the upper positive cone section of the conical inner cavity is larger than the top end area, and the space of the entire conical inner cavity will experience a change form of small-large-small along the direction from bottom to top.

5. A demulsification device for separation of phenolic resin according to claim 1, characterized in that: A plurality of evenly arranged spoilers are provided on the inner wall of the second demulsification tank.

6. A demulsification device for separation of phenolic resin according to claim 5, characterized in that: The spoiler is arranged obliquely upward along one end away from the inner wall of the second demulsification tank.

7. A demulsification device for separation of phenolic resin according to claim 1, characterized in that: The rectifying plate is provided with a plurality of channels extending in a direction parallel to the axis of the conical inner cavity.

8. A demulsification device for separation of phenolic resin according to claim 1, characterized in that: The two ends of the first filter membrane layer are respectively embedded in the inner wall of the first filter tank, and the first filter membrane layer is tiltedly arranged in the first filter tank.

9. A demulsification device for separation of phenolic resin according to claim 1, characterized in that: The two ends of the second filter membrane layer are respectively embedded in the inner wall of the second filter tank, and the second filter membrane layer is tiltedly arranged in the second filter tank.

10. A demulsification device for separation of phenolic resin according to claim 1, characterized in that: The flocculation solution pipeline and the emulsion pipeline are both provided with control valves.

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