Efficient negative-pressure liquid removal device for manufacturing RO (reverse osmosis) membrane and NF (nanofiltration) membrane

Abstract

The utility model relates to the technical field of RO membrane and NF membrane manufacturing process equipment, in particular to an efficient negative pressure liquid removal device for RO membrane and NF membrane manufacturing, which comprises a support, a guide roller and a water absorption roller, the support comprises a guide roller shaft and swing arms fixed at two ends of the guide roller shaft, the guide roller is rotatably sleeved on the guide roller shaft, and the water absorption roller is fixed on the guide roller shaft. The water absorption roller is arranged on the support, the two ends of the water absorption roller are fixedly connected with the swing arms, the water absorption roller is communicated with a negative pressure system, an automatic adjusting valve is arranged on a communication pipeline, and meanwhile a pressure transmitter is further arranged on the water absorption roller and matched with the automatic adjusting valve. The technical problem that in the prior art, membrane back water removal cannot be quantitatively controlled is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of RO membrane and NF membrane manufacturing process equipment, specifically a high-efficiency negative pressure liquid removal device for RO membrane and NF membrane manufacturing. Background Technology

[0002] In the production and processing of RO and NF membranes, in order to ensure that the moisture content of the base membrane is controllable, the back-side liquid removal process in the key process section requires quantitative control. However, the back-side liquid removal currently uses a scraper, which can only remove the liquid on the surface of the membrane back. The liquid in the pores of the membrane back substrate cannot be removed, resulting in uncontrollable moisture content. At the same time, too much liquid from the front-end process will be carried into the back-end, affecting the concentration of the back-end process and ultimately leading to unstable product performance. Summary of the Invention

[0003] To address the technical problem of the inability to quantitatively control back-side dewatering in existing technologies, this application proposes a high-efficiency negative pressure dewatering device for the manufacture of RO and NF membranes, thus solving the aforementioned technical problem.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] This utility model provides a high-efficiency negative pressure liquid removal device for the manufacture of RO and NF membranes, comprising: a support frame, the support frame including a guide roller shaft and swing arms fixed at both ends of the guide roller shaft; a guide roller, the guide roller being rotatably sleeved on the guide roller shaft; and a water-absorbing roller, the water-absorbing roller being disposed on the support frame, the two ends of the water-absorbing roller being fixedly connected to the swing arms, the water-absorbing roller being connected to a negative pressure system and an automatic regulating valve being disposed on the connecting pipeline, and a pressure transmitter being disposed on the water-absorbing roller in cooperation with the automatic regulating valve.

[0006] This utility model discloses a high-efficiency negative pressure dehydration device for the manufacture of RO and NF membranes. It comprises a suction roller, a guide roller shaft, a guide roller, a swing arm, a pressure transmitter, an automatic regulating valve, and a negative pressure system. The guide roller shaft is fixed, and the guide roller is mounted on it and can rotate around the shaft. The swing arm fixes the suction roller to the guide roller shaft and can drive the suction roller to rotate around the guide roller shaft. The pressure transmitter is installed on the suction roller to detect and adjust the negative pressure inside the suction roller. The negative pressure system provides a stable negative pressure to the suction roller. The membrane to be dehydrated runs tangentially along the suction roller and the guide roller, with its back side in contact with both. Through closed-loop control of the pressure transmitter and the automatic regulating valve, the device achieves quantitative control of the water absorption rate simply by setting the negative pressure value, thus solving the technical problem of the inability to quantitatively control membrane backside dehydration in existing technologies.

[0007] Furthermore, one end of the automatic regulating valve is connected to the water suction roller, and the other end is connected to the negative pressure system.

[0008] Furthermore, both ends of the guide roller shaft protrude from the swing arms of the bracket.

[0009] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0010] This utility model discloses a high-efficiency negative pressure dehydration device for the manufacture of RO and NF membranes. It comprises a suction roller, a guide roller shaft, a guide roller, a swing arm, a pressure transmitter, an automatic regulating valve, and a negative pressure system. The guide roller shaft is fixed, and the guide roller is mounted on it and can rotate around the shaft. The swing arm fixes the suction roller to the guide roller shaft and can drive the suction roller to rotate around the guide roller shaft. The pressure transmitter is installed on the suction roller to detect and adjust the negative pressure inside the suction roller. The negative pressure system provides a stable negative pressure to the suction roller. The membrane to be dehydrated runs tangentially along the suction roller and the guide roller, with its back side in contact with both. Through closed-loop control of the pressure transmitter and the automatic regulating valve, the device achieves quantitative control of the water absorption rate simply by setting the negative pressure value, thus solving the technical problem of the inability to quantitatively control membrane backside dehydration in existing technologies. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the high-efficiency negative pressure liquid removal device for the manufacture of RO membranes and NF membranes according to this utility model.

[0012] Figure 2 This is a schematic diagram from another perspective of the high-efficiency negative pressure liquid removal device for the manufacture of RO membranes and NF membranes according to this utility model.

[0013] Figure 3 This is a schematic diagram of the high-efficiency negative pressure liquid removal device for the manufacture of RO and NF membranes in the contact-type quantitative membrane dewatering mode.

[0014] Figure 4 This is a schematic diagram of the high-efficiency negative pressure liquid removal device for the manufacture of RO and NF membranes in operation.

[0015] Figure 5 This is a schematic diagram of the high-efficiency negative pressure liquid removal device for the manufacture of RO and NF membranes in the non-operation state.

[0016] Figure 6 This is a schematic diagram of the high-efficiency negative pressure liquid removal device for the manufacture of RO and NF membranes in the non-liquid removal state operation mode.

[0017] Wherein: 1-Water suction roller; 2-Guide roller shaft; 3-Guide roller; 4-Diaphragm; 5-Swing arm; 6-Pressure transmitter; 7-Automatic regulating valve; 8-Negative pressure system. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] like Figure 1-6 As shown, this utility model provides a high-efficiency negative pressure dehydration device for the manufacture of RO and NF membranes, including a support, a guide roller 3 and a water-absorbing roller 1. The support includes a guide roller shaft 2 and swing arms 5 fixed at both ends of the guide roller shaft 2. The guide roller 3 is rotatably sleeved on the guide roller shaft 2. The water-absorbing roller 1 is arranged on the support, and both ends of the water-absorbing roller 1 are fixedly connected to the swing arms 5. The water-absorbing roller 1 is connected to a negative pressure system 8 and an automatic regulating valve 7 is arranged on the connecting pipeline. At the same time, a pressure transmitter 6 is also arranged on the water-absorbing roller 1 to cooperate with the automatic regulating valve 7.

[0020] This utility model discloses a high-efficiency negative pressure dehydration device for the manufacture of RO and NF membranes. It comprises a water-absorbing roller 1, a guide roller shaft 2, a guide roller 3, a swing arm 5, a pressure transmitter 6, an automatic regulating valve 7, and a negative pressure system 8. The guide roller shaft 2 is fixed, and the guide roller 3 is mounted on it and can rotate around it. The swing arm 5 fixes the water-absorbing roller 1 to the guide roller shaft 2 and can drive the water-absorbing roller 1 to rotate around the guide roller shaft 2. The pressure transmitter 6 is installed on the water-absorbing roller 1 and is used to detect and adjust the negative pressure inside the water-absorbing roller 1. The negative pressure system 8 provides a stable negative pressure to the water-absorbing roller 1. The membrane 4 to be dehydrated runs tangentially along the water-absorbing roller 1 and the guide roller 3, with its back side in contact with both the water-absorbing roller 1 and the guide roller 3. Through closed-loop control of the pressure transmitter 6 and the automatic regulating valve 7, the water absorption can be quantitatively controlled simply by setting the negative pressure value, thus solving the technical problem of the inability to quantitatively control back-side dehydration in existing technologies.

[0021] Specifically, one end of the automatic regulating valve 7 is connected to the water suction roller 1, and the other end is connected to the negative pressure system 8 to adjust the negative pressure value inside the water suction roller 1.

[0022] In one specific embodiment of this utility model, the two ends of the guide roller shaft 2 protrude from the swing arm 5 of the bracket to facilitate the installation of the bracket.

[0023] The present invention provides a high-efficiency negative pressure dehydration device for the manufacture of RO and NF membranes, which can realize contact-type quantitative membrane dehydration, contact-type membrane scraping, and operation in non-dehydration states.

[0024] like Figure 3As shown, in the contact-type quantitative membrane dewatering mode, the membrane 4 runs tangentially along the suction roller 1 and the guide roller 3. The back of the membrane 4 contacts the suction roller 1 and the guide roller 33. The negative pressure system 8 is used to provide a stable negative pressure to the suction roller 1. The set negative pressure is set, and when the pressure transmitter 6 detects that the set pressure has been reached, it controls the opening of the automatic regulating valve 7 to achieve closed-loop negative pressure control, so as to achieve the function of quantitative control of the suction roller 1.

[0025] In the contact diaphragm scraping mode, the diaphragm 4 runs tangentially along the suction roller 1 and the guide roller 3. The back of the diaphragm 4 contacts the suction roller 1 and the guide roller 3. The negative pressure system 8 is closed, and the pressure transmitter 6 and the automatic regulating valve 7 are closed, so only the liquid on the back surface of the diaphragm 4 is scraped off.

[0026] like Figure 6 As shown, in the non-liquid removal operation mode, the water suction roller 1 is moved away from the diaphragm 4 by rotating the swing arm 5. The diaphragm 4 runs along the tangent of the guide roller 3. The back of the diaphragm 4 contacts the guide roller 3. The back of the diaphragm 4 does not contact the water suction roller 1. The negative pressure system 8 is closed. The pressure transmitter 6 and the automatic regulating valve 7 are closed, thus realizing the non-liquid removal function.

[0027] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A high-efficiency negative pressure liquid removal device for the manufacture of RO membranes and NF membranes, characterized in that, include: The bracket includes a guide roller shaft (2) and swing arms (5) fixed at both ends of the guide roller shaft (2); Guide roller (3), which is rotatably sleeved on the guide roller shaft (2); A water-absorbing roller (1) is mounted on the bracket. Both ends of the water-absorbing roller (1) are fixedly connected to the swing arm (5). The water-absorbing roller (1) is connected to the negative pressure system (8) and an automatic regulating valve (7) is provided on the connecting pipeline. At the same time, a pressure transmitter (6) is also provided on the water-absorbing roller (1) to cooperate with the automatic regulating valve (7).

2. The high-efficiency negative pressure liquid removal device for manufacturing RO membranes and NF membranes according to claim 1, characterized in that, One end of the automatic regulating valve (7) is connected to the water suction roller (1), and the other end is connected to the negative pressure system (8).

3. The high-efficiency negative pressure liquid removal device for manufacturing RO membranes and NF membranes according to claim 1, wherein the two ends of the guide roller shaft (2) protrude from the swing arm (5) of the bracket.

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