A kind of for ammoximation membrane filter backflush port buffer device

Abstract

This utility model relates to the field of membrane and filter plate cleaning technology, and in particular to a buffer device for the backflush port of an ammonia oxime membrane filter. The device includes a flow guiding mechanism; the flow guiding mechanism includes a backflush connector and a guide spiral; the backflush connector guides the backflush liquid to the membrane filter; the guide spiral is inserted inside the backflush connector and rotatably connected to it. In use, the buffer device for the backflush port of an ammonia oxime membrane filter provided by this utility model forms a spiral flow channel between the inner wall of the backflush connector and the outer surface of the guide spiral, guiding the backflush liquid into the membrane filter in an inclined direction, thereby preventing the backflush liquid from directly impacting the membrane tube surface and effectively reducing the instantaneous impact force caused by the backflush liquid on the membrane tube. This solves the problem that the membrane tube near the backflush port is frequently subjected to both positive and negative forces, causing the membrane tube to easily develop and propagate micro-cracks under load.

Description

Technical Field

[0001] This utility model relates to the field of membrane and filter plate cleaning technology, and in particular to a buffer device for the backflush port of an ammonium oxime membrane filter. Background Technology

[0002] In the process of ammonia oxime reaction, catalysts such as titanium silicate molecular sieves are widely used to catalyze the reaction of ketones or aldehydes with hydrogen peroxide and ammonia to form oximes. The mother liquor after the reaction contains unreacted raw materials, by-products and catalysts. In order to achieve efficient recovery and utilization of catalysts, membrane filters are usually used to perform solid-liquid separation of the mother liquor.

[0003] In the prior art, during the operation of the membrane filter, the backwashing process and the normal liquid discharge process are operated intermittently to prevent contaminants from adhering to the surface of the filter membrane. The backwashing liquid with higher pressure is periodically injected into the clean liquid side of the filter membrane from the clean liquid outlet in reverse. The backwashing liquid passes through the filter membrane in reverse to remove contaminants adhering to the surface of the filter membrane.

[0004] However, because the membrane tube near the backflush port is frequently subjected to both positive and negative forces, it is prone to developing and propagating micro-cracks under the applied force, which can lead to fatigue fracture of the membrane tube. Utility Model Content

[0005] This invention provides a buffer device for the backflush port of an ammonium oxime membrane filter to solve the problem that the membrane tube near the backflush port is frequently subjected to both positive and negative forces, which causes the membrane tube to easily develop micro-cracks and propagate under the applied force, thus leading to fatigue fracture of the membrane tube.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: A buffer device for the backflush port of an ammonia oxime membrane filter: The device includes a flow guiding mechanism; the flow guiding mechanism includes a backflush connector and a guide spiral; the backflush connector is used to guide backflush fluid to the membrane filter; the guide spiral is inserted into the backflush connector and rotatably connected to the backflush connector; a spiral flow channel is formed between the inner wall of the backflush connector and the outer surface of the guide spiral, which is used to guide the backflush fluid into the membrane filter in an inclined direction; the guide spiral can rotate around its own axis to periodically change the outlet position of the spiral flow channel, thereby changing the flow direction of the backflush fluid into the membrane filter.

[0007] Furthermore, the flow guiding mechanism has an acceleration mode and a deceleration mode; in the acceleration mode, the guide spiral rotates along its helix angle direction to apply an axial pushing force to the backflushing fluid through the spiral flow channel, thereby accelerating the backflushing fluid into the membrane filter; in the deceleration mode, the guide spiral rotates in the opposite direction to its helix angle direction to apply an axial resistance to the backflushing fluid through the spiral flow channel, thereby reducing the speed at which the backflushing fluid enters the membrane filter.

[0008] Furthermore, the flow guiding mechanism also has a pulsating mode; in the pulsating mode, the guide spiral periodically changes its rotation direction to cyclically change the speed at which the backflushing fluid enters the membrane filter.

[0009] Furthermore, it also includes a drive motor; the flow guiding mechanism also includes a support structure; The guide spiral includes a drive shaft and spiral blades; the drive motor is connected to the backflush joint, and its rotation axis is connected to the drive shaft; the end of the drive shaft away from the drive motor is inserted into the support structure and rotatably connected to the support structure to provide support to the drive shaft; the spiral blades are fitted onto the drive shaft.

[0010] Furthermore, the support structure includes a support ring and guide vanes; the support ring is fitted onto the drive shaft and rotatably connected to the drive shaft; one end of the guide vane is connected to the support ring, and the other end is connected to the backflush connector; the guide vane is arranged at an angle, and its angle direction is the same as the helical direction of the helical blade, in order to reduce disturbance to the backflush fluid flow path.

[0011] Furthermore, the backflush connector includes a carrier pipe and an inlet pipe; the outlet of the inlet pipe is connected to the inlet of the carrier pipe; the inlet pipe is arranged at an angle, and its angle direction is the same as the flow direction of the backflush fluid in the carrier pipe, in order to reduce energy loss during the process of the backflush fluid entering the carrier pipe.

[0012] Furthermore, the spiral blade is located below the inlet of the carrier pipe, so that the backflushing fluid enters the carrier pipe first and then enters the spiral flow channel, thereby avoiding the backflushing fluid directly impacting the spiral blade.

[0013] Furthermore, it also includes a sealing adapter mechanism; the sealing adapter mechanism includes an adapter seat and a rotary sealing structure; one end of the adapter seat is connected to the carrier pipe, and the other end is connected to the drive motor; the rotary sealing structure is connected to the adapter seat; the rotary sealing structure is rotatably fitted onto the drive shaft and abuts against the drive shaft to seal, thereby preventing leakage of backflushing fluid in the carrier pipe.

[0014] Furthermore, the rotary sealing structure includes a sealing seat and a rotary sealing ring; the rotary sealing ring is fitted inside the sealing seat, and the rotary sealing ring is rotatably fitted onto the drive shaft and abuts against the drive shaft for sealing.

[0015] Furthermore, the rotary sealing structure also includes a static sealing ring; one side of the static sealing ring abuts against the sealing seat, and the other side abuts against the adapter seat, for sealing the sealing seat and the adapter seat.

[0016] The beneficial effects of this invention for the backflush buffer device of an ammonium oxime membrane filter are analyzed as follows: The device includes a flow guiding mechanism; the flow guiding mechanism includes a backflush connector and a guide spiral; the backflush connector is used to guide the backflush liquid to the membrane filter; the guide spiral is inserted into the backflush connector and is rotatably connected to the backflush connector; a spiral flow channel is formed between the inner wall of the backflush connector and the outer surface of the guide spiral, which is used to guide the backflush liquid into the membrane filter in an inclined direction; the guide spiral can rotate around its own axis to periodically change the outlet position of the spiral flow channel, thereby changing the flow direction of the backflush liquid into the membrane filter.

[0017] The buffer device for backflush port of the ammonium oxime membrane filter provided by this utility model forms a spiral flow channel between the inner wall of the backflush connector and the outer surface of the guide spiral, so as to guide the backflush liquid into the membrane filter in an inclined direction, thereby avoiding the backflush liquid directly impacting the membrane tube surface and effectively reducing the instantaneous impact force of the backflush liquid on the membrane tube.

[0018] In addition, the guide spiral can rotate around its own axis to periodically change the outlet position of the spiral flow channel, thereby changing the flow direction of the backflushing liquid into the membrane filter, thus avoiding fatigue damage caused by prolonged impact of backflushing liquid on local areas of the membrane tube. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This utility model provides a schematic diagram of the structure of a backflush buffer device for an ammonium oxime membrane filter. Figure 2 This utility model provides a front view of a backflush buffer device for an ammonium oxime membrane filter according to an embodiment of the present invention. Figure 3A cross-sectional view of the flow guiding mechanism provided in this embodiment of the utility model; Figure 4 A schematic diagram of the support structure provided in this embodiment of the utility model; Figure 5 An exploded three-dimensional structural diagram of the sealing transition mechanism provided in this embodiment of the utility model.

[0021] icon: 100-Flow guiding mechanism; 110-Backflush connector; 111-Bearing pipe; 112-Inlet pipe; 120-Guide spiral; 121-Drive shaft; 122-Spiral blade; 130-Support structure; 131-Support ring; 132-Flow guiding blade; 200-Drive motor; 300-Sealing adapter mechanism; 310-Adapter seat; 320-Rotary sealing structure; 321-Sealing seat; 322-Rotary sealing ring; 323-Static sealing ring; 330-Shock-damping coupling. Detailed Implementation

[0022] Because the membrane tube near the backflush port is frequently subjected to both positive and negative forces, it is prone to developing and propagating micro-cracks under load, which can lead to fatigue fracture of the membrane tube.

[0023] In view of this, this solution provides a buffer device for the backflush port of an ammonium oxime membrane filter, including a flow guiding mechanism 100.

[0024] The following combination Figures 1-5 The structure and shape of the buffer device used for the backflush port of the ammonia oxime membrane filter are described in detail: The flow guiding mechanism 100 includes a backflush connector 110 and a guide spiral 120. The backflush connector 110 is used to guide the backflush liquid to the membrane filter. The guide spiral 120 is inserted into the backflush connector 110 and is rotatably connected to the backflush connector 110. A spiral flow channel is formed between the inner wall of the backflush connector 110 and the outer surface of the guide spiral 120 to guide the backflush liquid into the membrane filter in an inclined direction. The guide spiral 120 can rotate around its own axis to periodically change the outlet position of the spiral flow channel, thereby changing the flow direction of the backflush liquid into the membrane filter.

[0025] In this embodiment, a spiral flow channel is formed between the inner wall of the backflush connector 110 and the outer surface of the guide spiral 120 to guide the backflush liquid into the membrane filter in an inclined direction, thereby avoiding the backflush liquid from directly impacting the membrane tube surface and effectively reducing the instantaneous impact force of the backflush liquid on the membrane tube.

[0026] In addition, the guide spiral 120 can rotate around its own axis to periodically change the outlet position of the spiral flow channel, thereby changing the flow direction of the backflushing liquid into the membrane filter, thus avoiding fatigue damage caused by prolonged impact of backflushing liquid on local areas of the membrane tube.

[0027] In order to flexibly adjust the flow rate of the backflushing fluid output by the flow guiding mechanism 100: like Figure 3 As shown, the flow guiding mechanism 100 has an acceleration mode and a deceleration mode. In the acceleration mode, the guide spiral 120 rotates in the direction of its spiral helix angle to apply an axial driving force to the backflushing liquid through the spiral flow channel, thereby accelerating the backflushing liquid into the membrane filter. In the deceleration mode, the guide spiral 120 rotates in the opposite direction to its spiral helix angle to apply an axial resistance to the backflushing liquid through the spiral flow channel, thereby reducing the speed at which the backflushing liquid enters the membrane filter.

[0028] In this embodiment, when it is necessary to accelerate the flow of backflushing liquid into the membrane accelerator, the guide spiral 120 rotates along its spiral helix angle direction so that the spiral flow channel applies an axial pushing force to the backflushing liquid, thereby accelerating the backflushing liquid into the membrane filter. At the same time, the guide spiral 120, by rotating around its own axis, adjusts the position of the backflushing liquid entering the membrane filter while compensating for the damage to kinetic energy caused by the movement of the backflushing liquid along the spiral flow channel.

[0029] When it is necessary to reduce the speed at which backflush fluid flows into the membrane accelerator, the guide spiral 120 rotates in the opposite direction of its spiral angle so that the spiral channel applies axial resistance to the backflush fluid, thereby reducing the speed at which the backflush fluid enters the membrane filter.

[0030] To improve the efficiency of the backwashing process: like Figure 3 As shown, the flow guiding mechanism 100 also has a pulsating mode; in the pulsating mode, the guide spiral 120 periodically changes its rotation direction to cyclically change the speed at which the backflushing liquid enters the membrane filter.

[0031] In this embodiment, the guide spiral 120 periodically changes its rotation direction to cyclically change the speed at which the backflushing liquid enters the membrane filter, thereby periodically changing the flow rate and direction of the backflushing liquid, enhancing the dynamic shear force on the membrane surface and inducing local turbulence, thus effectively stripping and removing contaminants; at the same time, the constantly changing flow state makes the cleaning effect more evenly distributed on the membrane surface, avoiding local over-rinsing and preventing the formation of short-circuit channels, significantly improving the cleaning efficiency.

[0032] To prevent the guide spiral 120 from oscillating within the backflush joint 110: like Figures 1-3As shown, it also includes a drive motor 200; the flow guiding mechanism 100 also includes a support structure 130; the guide spiral 120 includes a drive shaft 121 and spiral blades 122; the drive motor 200 is connected to the backflush joint 110, and its rotation shaft is connected to the drive shaft 121; one end of the drive shaft 121 away from the drive motor 200 is inserted into the support structure 130 and rotatably connected to the support structure 130, for providing support to the drive shaft 121; the spiral blades 122 are fitted onto the drive shaft 121.

[0033] To avoid the influence of the support structure 130 on the backfluid flow: like Figure 4 As shown, the support structure 130 includes a support ring 131 and a guide vane 132; the support ring 131 is fitted onto the drive shaft 121 and is rotatably connected to the drive shaft 121; one end of the guide vane 132 is connected to the support ring 131, and the other end is connected to the backflushing joint 110; the guide vane 132 is arranged at an angle, and its angle direction is the same as the helical direction of the helical blade 122, in order to reduce the disturbance to the backflushing fluid flow path.

[0034] In this embodiment, the support structure 130 is rotatably connected to the end of the drive shaft 121 away from the drive motor 200 so that both ends of the drive shaft 121 are supported, thereby preventing the guide screw 120 from swinging during operation and reducing the probability of the guide screw 120 colliding and being damaged by the backflush joint 110.

[0035] In addition, the guide vane 132 is arranged at an angle, and its angle is the same as the spiral direction of the spiral vane 122, so as to reduce the area of ​​the guide vane 132 facing the backfluid flow, thereby reducing the disturbance of the support structure 130 to the backfluid flow path.

[0036] To reduce kinetic energy loss during the process of backflushing fluid entering backflushing joint 110: like Figure 3 As shown, the backflush connector 110 includes a carrier pipe 111 and an inlet pipe 112; the outlet of the inlet pipe 112 is connected to the inlet of the carrier pipe 111; the inlet pipe 112 is arranged at an angle, and its angle direction is the same as the flow direction of the backflush fluid in the carrier pipe 111, in order to reduce the energy loss during the process of the backflush fluid entering the carrier pipe 111.

[0037] In this embodiment, by arranging the inlet pipe 112 at an angle, and the angle of inclination is the same as the flow direction of the backflushing liquid in the carrier pipe 111, the sudden change in direction of the backflushing liquid during the process of entering the carrier pipe 111 is reduced, the local disturbance and the formation of vortices are reduced, thereby reducing the energy loss during the process of the backflushing liquid entering the carrier pipe 111.

[0038] To reduce the likelihood of deformation damage to the propeller blade 122: like Figure 3 As shown, the spiral blade 122 is located below the inlet of the carrier pipe 111 so that the backflushing liquid enters the carrier pipe 111 first and then enters the spiral flow channel, thereby avoiding the backflushing liquid directly impacting the spiral blade 122.

[0039] In this embodiment, by setting the spiral blade 122 on the lower side of the inlet of the carrier pipe 111, the backflushing liquid enters the carrier pipe 111 first, and after rectification in the carrier pipe 111, it enters the spiral channel, thereby avoiding direct impact on the spiral blade 122 and reducing the probability of deformation and damage to the spiral blade 122.

[0040] In addition, by allowing the backfluid to first enter the carrier pipe 111, and then rectify it within the carrier pipe 111 before entering the spiral channel, a smooth transition of the backfluid flow state is achieved, thereby improving the guiding efficiency of the spiral channel for the backfluid.

[0041] To prevent backflushing fluid leakage inside the bearing pipe 111: like Figure 1 and Figure 5 As shown, it also includes a sealing transition mechanism 300; the sealing transition mechanism 300 includes a transition seat 310 and a rotary sealing structure 320; one end of the transition seat 310 is connected to the carrier pipe 111, and the other end is connected to the drive motor 200; the rotary sealing structure 320 is connected to the transition seat 310; the rotary sealing structure 320 is rotatably mounted on the drive shaft 121 and abuts against the drive shaft 121 to seal, so as to prevent backflushing fluid leakage in the carrier pipe 111.

[0042] Regarding how the rotary seal structure 320 seals the space between the drive shaft 121 and the adapter 310: like Figure 5 The rotary sealing structure 320 shown includes a sealing seat 321 and a rotary sealing ring 322; the rotary sealing ring 322 is fitted inside the sealing seat 321, and the rotary sealing ring 322 is rotatably mounted on the drive shaft 121 and abuts against the drive shaft 121 for sealing.

[0043] To prevent backflushing fluid from leaking between the sealing seat 321 and the adapter seat 310: like Figure 5 As shown, the rotary sealing structure 320 also includes a static sealing ring 323; one side of the static sealing ring 323 abuts against the sealing seat 321 and the other side abuts against the adapter seat 310, for sealing the sealing seat 321 and the adapter seat 310.

[0044] To reduce the vibration generated during the reciprocating rotation of the guide screw 120: like Figure 5As shown, the sealing adapter 300 also includes a shock-absorbing coupling 330. The type of shock-absorbing coupling 330 includes, but is not limited to, a plum blossom type flexible coupling. One end of the shock-absorbing coupling 330 is connected to the drive shaft 121, and the other end is connected to the rotating shaft of the drive motor 200. By absorbing impact stress, it reduces the vibration generated during the reciprocating rotation of the guide screw 120.

[0045] In this embodiment, the rotary sealing ring 322, through elastic deformation, ensures that the drive shaft 121 remains sealed with the sealing seat 321 in both static and rotating states, thereby preventing backflushing fluid from leaking between the drive shaft 121 and the sealing seat 321; the static sealing ring 323, through elastic deformation, seals the sealing seat 321 and the adapter seat 310, thereby preventing backflushing fluid from leaking between the sealing seat 321 and the adapter seat 310, thus preventing backflushing fluid leakage from the bearing pipe 111.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A buffer device for the backflush port of an ammonia oxime membrane filter, characterized in that: Includes a flow guiding mechanism (100); The flow guiding mechanism (100) includes a backflush joint (110) and a guide spiral (120). The backflush connector (110) is used to guide the backflush fluid to the membrane filter; The guide screw (120) is inserted inside the backflush joint (110) and is rotatably connected to the backflush joint (110); A spiral flow channel is formed between the inner wall of the backflush connector (110) and the outer surface of the guide spiral (120) to guide the backflush liquid into the membrane filter in an inclined direction. The guide spiral (120) can rotate around its own axis to periodically change the outlet position of the spiral channel, thereby changing the flow direction of the backflushing liquid into the membrane filter.

2. The buffer device for backflush port of an ammonium oxime membrane filter according to claim 1, characterized in that: The flow guiding mechanism (100) has an acceleration mode and a deceleration mode; In the acceleration mode, the guide spiral (120) rotates along its spiral angle direction to apply an axial driving force to the backflush fluid through the spiral channel, thereby accelerating the backflush fluid into the membrane filter; In the deceleration mode, the guide spiral (120) rotates in the opposite direction to its spiral angle so that the spiral channel applies axial resistance to the backflush fluid, thereby reducing the speed at which the backflush fluid enters the membrane filter.

3. The buffer device for backflush port of an ammonium oxime membrane filter according to claim 2, characterized in that: The flow guiding mechanism (100) also has a pulsating mode; In the pulsating mode, the guide spiral (120) periodically changes its rotation direction to cyclically change the speed at which backflushing fluid enters the membrane filter.

4. The buffer device for backflush port of an ammonium oxime membrane filter according to claim 3, characterized in that: It also includes a drive motor (200); The flow guiding mechanism (100) also includes a support structure (130); The guide spiral (120) includes a drive shaft (121) and spiral blades (122). The drive motor (200) is connected to the backflush joint (110), and its rotation shaft is connected to the drive shaft (121). The end of the drive shaft (121) away from the drive motor (200) is inserted into the support structure (130) and is rotatably connected to the support structure (130) to provide support to the drive shaft (121); The helical blade (122) is fitted onto the drive shaft (121).

5. The buffer device for backflush port of an ammonium oxime membrane filter according to claim 4, characterized in that: The support structure (130) includes a support ring (131) and a guide vane (132). The support ring (131) is fitted onto the drive shaft (121) and is rotatably connected to the drive shaft (121); One end of the guide vane (132) is connected to the support ring (131), and the other end is connected to the backflush connector (110). The guide vane (132) is arranged at an angle, and its angle is the same as the spiral direction of the spiral vane (122) to reduce the disturbance to the flow path of the backflushing fluid.

6. The buffer device for backflush port of an ammonium oxime membrane filter according to claim 5, characterized in that: The backflush connector (110) includes a support pipe (111) and an inlet pipe (112). The outlet of the liquid inlet pipe (112) is connected to the inlet of the carrier pipe (111); The inlet pipe (112) is arranged at an angle, and its angle is the same as the flow direction of the backflushing liquid in the bearing pipe (111), in order to reduce the energy loss of the backflushing liquid in the process of entering the bearing pipe (111).

7. The buffer device for backflush port of an ammonium oxime membrane filter according to claim 6, characterized in that: The spiral blade (122) is located below the inlet of the carrier pipe (111) so that the backflushing liquid enters the carrier pipe (111) first and then enters the spiral flow channel, thereby avoiding the backflushing liquid directly impacting the spiral blade (122).

8. The buffer device for backflush port of an ammonium oxime membrane filter according to claim 7, characterized in that: It also includes a sealing transition mechanism (300); The sealing adapter (300) includes an adapter seat (310) and a rotary sealing structure (320). One end of the adapter (310) is connected to the bearing tube (111), and the other end is connected to the drive motor (200). The rotary sealing structure (320) is connected to the adapter (310); the rotary sealing structure (320) is rotatably fitted onto the drive shaft (121) and abuts against the drive shaft (121) to seal, thereby preventing leakage of backflushing fluid in the bearing pipe (111).

9. The buffer device for backflush port of an ammonium oxime membrane filter according to claim 8, characterized in that: The rotary sealing structure (320) includes a sealing seat (321) and a rotary sealing ring (322). The rotary sealing ring (322) is fitted inside the sealing seat (321), and the rotary sealing ring (322) is rotatably fitted onto the drive shaft (121) and abuts against the drive shaft (121) for sealing.

10. The buffer device for backflush port of an ammonium oxime membrane filter according to claim 9, characterized in that: The rotary sealing structure (320) also includes a static sealing ring (323); One side of the static sealing ring (323) abuts against the sealing seat (321), and the other side abuts against the adapter seat (310), for sealing the sealing seat (321) and the adapter seat (310).

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