Energy-saving self-adaptive immersed ultrafiltration membrane filtering device

Abstract

The utility model discloses an energy-saving self-adaptive immersed ultrafiltration membrane filtering device which comprises a filter tank and a frame fixedly connected to the side wall of the filter tank, a plurality of membrane bodies are detachably arranged in an inner shell of the frame, and the energy-saving self-adaptive immersed ultrafiltration membrane filtering device further comprises a control assembly arranged in the filter tank and used for self-adaptively controlling the water inlet amount of a liquid inlet pipe and the water outlet amount of a suction pump. The control assembly comprises a fixing plate which is fixedly connected to the side, close to the liquid inlet pipe, of the filter tank, the fixing plate is provided with a floating ball type liquid level meter, the floating ball type liquid level meter is composed of a shell and a measuring element arranged in the shell, one side of the shell is fixedly connected with a connecting rod, and the side wall of the connecting rod is in sliding connection with a ball body. Through the arrangement of the control assembly, the opening degree of the control valve on the side wall of the liquid inlet pipe and the operation power of the suction pump are automatically controlled to be adaptive to the water level in the filter tank, so that the membrane body is always immersed in a proper liquid level, a stable filtering effect is maintained, and the energy consumption increase caused by too high or too low liquid level is avoided.

Description

Technical Field

[0001] This utility model relates to the field of ultrafiltration membrane filtration technology, specifically to an energy-saving adaptive submerged ultrafiltration membrane filtration device. Background Technology

[0002] In the ultrafiltration process, the aqueous solution flows through the membrane surface under pressure. Solvents and small molecule solutes smaller than the membrane pores permeate through the water membrane and become purified liquid, while solutes and solute clusters larger than the membrane pores are trapped and discharged with the water flow, becoming concentrated liquid. The ultrafiltration process is dynamic filtration, and the separation is completed in a flowing state. Solutes are deposited only to a limited extent on the membrane surface. The ultrafiltration rate decays to a certain extent and tends to reach equilibrium, which can be restored by cleaning.

[0003] In actual operation, the water to be treated enters the filter bed, immersing the ultrafiltration membrane. Water is then drawn in by a suction pump under negative pressure, utilizing the liquid level difference. Under this pressure difference, water permeates from the outside to the inside of the ultrafiltration membrane. Particles, colloids, bacteria, pyrogens, and high-molecular-weight organic matter in the water are trapped on the membrane surface, while clean water permeates through the membrane and is drawn out of the filter bed by the suction pump. However, in actual filtration, it is difficult to control the influent flow and pump operation based on liquid level changes, resulting in the ultrafiltration membrane being submerged at an inappropriate liquid level. When the liquid level is too high, the ultrafiltration membrane is subjected to greater hydrostatic pressure, leading to membrane fiber deformation or damage, affecting the membrane's filtration performance. Simultaneously, to maintain a certain water production rate, the suction pump needs to overcome greater pressure, increasing suction energy consumption. When the liquid level is too low, the suction pump draws in air, forming a gas-liquid mixture, reducing suction efficiency. To achieve the same water production rate, the suction pump requires longer operating time or higher power, further increasing energy consumption.

[0004] Therefore, there is an urgent need for energy-saving adaptive submerged ultrafiltration membrane filtration devices to solve the above problems. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving adaptive submerged ultrafiltration membrane filtration device, comprising a filter tank and a frame fixedly connected to the side wall of the filter tank, wherein multiple membrane bodies are detachably installed inside the frame, an L-shaped plate is fixedly connected to the inlet end of the filter tank, the L-shaped plate is provided with an inlet pipe, a control valve is provided on the side wall of the inlet pipe, a suction pump is provided on the bottom side wall of the filter tank, and a control component is also provided in the filter tank for adaptively controlling the inlet flow rate of the inlet pipe and the outlet flow rate of the suction pump;

[0006] The control assembly includes a fixed plate fixedly connected to the side of the filter tank near the inlet pipe. The fixed plate is equipped with a float-type liquid level gauge, which consists of a housing and a measuring element disposed inside the housing. A connecting rod is fixedly connected to one side of the housing, and a ball is slidably connected to the side wall of the connecting rod. The fixed plate is equipped with a protective assembly for protecting the ball.

[0007] The float-type level gauge is electrically connected to the control valve and the suction pump via a controller.

[0008] The protective assembly includes a U-shaped protective frame fixedly connected to the fixed plate on the side near the membrane body. A U-shaped hole is provided on one side of the U-shaped protective frame. A U-shaped plate is connected to the U-shaped hole through a buffer assembly. A filter plate is fixedly connected to the side of the U-shaped plate away from the U-shaped protective frame.

[0009] The buffer assembly includes multiple buffer tubes fixedly connected to the bottom wall of the U-shaped hole. Each buffer tube is slidably connected to a buffer rod. One end of each buffer rod is connected to the U-shaped plate. One end of each buffer rod located inside the buffer tube is fixedly connected to a buffer plate. One end of each buffer plate away from the buffer rod is fixedly connected to a spring. The other end of each spring is connected to the bottom wall of the buffer tube.

[0010] Each of the buffer tubes is filled with damping fluid, and each of the buffer plates has multiple through holes on its sidewalls. The damping fluid flows through each through hole under pressure.

[0011] The bottom of the filter tank is provided with multiple interconnected installation pipes, and the side wall of each installation pipe is provided with multiple aeration heads. The side wall of the filter tank is provided with an air inlet pipe, one end of which is connected to one of the installation pipes, and the other end of which is connected to an external high-pressure air pump.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model discloses an energy-saving adaptive submerged ultrafiltration membrane filtration device. By setting up control components and using a float-type level gauge to detect the water level in the filter tank, it automatically controls the opening degree of the control valve on the side wall of the inlet pipe and the operating power of the suction pump to adapt to the water level in the filter tank. This ensures that the membrane body is always submerged at a suitable liquid level, maintains a stable filtration effect, avoids increased energy consumption due to excessively high or low liquid levels, and thus improves the energy efficiency of water filtration. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the filter tank of this utility model;

[0016] Figure 3 This is a schematic diagram of the membrane module structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the control and protection components of this utility model;

[0018] Figure 5 This is a schematic diagram of the internal structure of the buffer component of this utility model;

[0019] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0020] In the diagram: 101, filter bed; 102, frame; 103, membrane body; 104, L-shaped plate; 105, inlet pipe; 106, suction pump; 201, fixing plate; 202, shell; 203, connecting rod; 204, sphere; 301, U-shaped protective frame; 302, U-shaped hole; 303, U-shaped plate; 304, filter plate; 401, buffer pipe; 402, buffer rod; 403, buffer plate; 404, spring; 405, through hole; 501, mounting pipe; 502, aeration head; 503, air inlet pipe. Detailed Implementation

[0021] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Please see Figures 1-6 The energy-saving adaptive submerged ultrafiltration membrane filtration device shown in the figure includes a filter tank 101 and a frame 102 fixedly connected to the side wall of the filter tank 101. Multiple membrane bodies 103 are detachably installed inside the frame 102. An L-shaped plate 104 is fixedly connected to the liquid inlet end of the filter tank 101. The L-shaped plate 104 is provided with a liquid inlet pipe 105. A control valve is provided on the side wall of the liquid inlet pipe 105. A suction pump 106 is provided near the bottom side wall of the filter tank 101. The device also includes a control component installed in the filter tank 101 for adaptively controlling the inlet flow rate of the liquid inlet pipe 105 and the outlet flow rate of the suction pump 106.

[0024] The control assembly includes a fixed plate 201 fixedly connected to the side of the filter tank 101 near the inlet pipe 105. The fixed plate 201 is equipped with a float-type liquid level gauge, which consists of a housing 202 and a measuring element disposed in the housing 202. A connecting rod 203 is fixedly connected to one side of the housing 202, and a ball 204 is slidably connected to the side wall of the connecting rod 203. The fixed plate 201 is equipped with a protective assembly for protecting the ball 204.

[0025] It should be noted that by setting the control components and using a float-type level gauge to detect the water level in the filter tank 101, the opening degree of the control valve on the side wall of the inlet pipe 105 and the operating power of the suction pump 106 are automatically controlled to adapt to the water level in the filter tank 101. This ensures that the membrane body 103 is always submerged at a suitable liquid level, maintains a stable filtration effect, avoids increased energy consumption due to excessively high or low liquid levels, and thus improves the energy efficiency of water filtration.

[0026] Please see Figure 1 and Figure 2 The float-type level gauge in the diagram is electrically connected to the control valve and the suction pump 106 via a controller.

[0027] It should be noted here that the float-type level gauge is electrically connected to the control valve and the suction pump 106 via the controller, which facilitates the timely transmission of the water level detection results by the float-type level gauge.

[0028] It is worth noting that the float-type level gauge is based on Archimedes' principle of buoyancy. When the liquid level changes, the ball 204 (float) moves up and down with the rise and fall of the liquid level. This displacement of the ball 204 is transmitted to the measuring element through the connecting rod 203. The measuring element converts it into an electrical signal, such as a change in resistance, inductance or capacitance. These electrical signals are converted and processed, and finally displayed as an intuitive liquid level value, thereby achieving accurate measurement of the liquid level. As this is existing technology, it will not be elaborated on in detail here.

[0029] Working principle: In actual operation, the water to be treated enters the filter tank 101, immerses the ultrafiltration membrane, and is drawn by the negative pressure of the suction pump 106 through the liquid level pressure difference. Under the action of pressure difference, the water permeates from the outside to the inside of the membrane body 103, thereby trapping particles, colloids, bacteria, pyrogens and high molecular organic matter in the water on the surface of the membrane body 103, while the clean water permeates through the membrane body 103 and is drawn out of the filter tank 101 by the suction pump 106.

[0030] Furthermore, during the filtration of the water to be treated, a float-type level gauge can be used to detect the water level in the filter tank 101. Based on the feedback information from the float-type level gauge, the controller automatically controls the opening of the control valve on the side wall of the inlet pipe 105 and the operating power of the suction pump 106, thereby maintaining the liquid level in the filter tank 101 within a set range. For example, when the inlet flow rate is large or the pressure is high, the speed of the suction pump 106 is appropriately reduced to avoid excessively fast filtration speed on the surface of the membrane body 103, which would lead to increased pollution. Conversely, when the inlet flow rate is small or the pressure is low, the speed of the suction pump 106 is increased to ensure sufficient water production. This facilitates automatic control of the inlet valve and the operation of the suction pump 106 based on changes in liquid level, ensuring that the membrane body 103 is always submerged at a suitable liquid level, maintaining a stable filtration effect, and avoiding increased energy consumption due to excessively high or low liquid levels.

[0031] Example 2

[0032] Please see Figure 5 This embodiment further illustrates Example 1. The protective component shown in the figure includes a U-shaped protective frame 301 fixedly connected to the fixed plate 201 near the membrane body 103. A U-shaped hole 302 is provided on one side of the U-shaped protective frame 301. A U-shaped plate 303 is connected to the U-shaped hole 302 through a buffer component. A filter plate 304 is fixedly connected to the side of the U-shaped plate 303 away from the U-shaped protective frame 301.

[0033] It should be noted here that the protective components are designed to reduce the impact of impurities in the water being treated on the upward or downward movement of the sphere 204.

[0034] Please see Figure 5 and Figure 6 The buffer assembly shown in the figure includes multiple buffer tubes 401 fixedly connected to the bottom wall of the U-shaped hole 302. Each buffer tube 401 is slidably connected to a buffer rod 402. One end of each buffer rod 402 is connected to the U-shaped plate 303. One end of each buffer rod 402 located inside the buffer tube 401 is fixedly connected to a buffer plate 403. One end of each buffer plate 403 away from the buffer rod 402 is fixedly connected to a spring 404. The other end of each spring 404 is connected to the bottom wall of the buffer tube 401. Each buffer tube 401 is filled with damping fluid. Each buffer plate 403 has multiple through holes 405 on its side wall. The damping fluid flows through each through hole 405 under pressure.

[0035] It should be noted that, through the buffer assembly, when the inlet pipe 105 delivers the water to be treated into the filter tank 101, it will impact the original water in the filter tank 101, causing fluctuations. When the fluctuating water surface impacts the surface of the filter plate 304 on one side of the U-shaped plate 303, the impact force will push the U-shaped plate 303 into the U-shaped hole 302, thereby pushing the buffer plate 403 at one end of the buffer rod 402 to slide within the buffer tube 401, which in turn compresses the spring 404. This causes the spring 404 to deform under force, forming an elastic force. Under the elastic action of the spring 404, the pressure on the filter plate 304 is reduced. The impact force forms a buffer, and as the buffer plate 403 moves inside the buffer tube 401, it will squeeze the damping fluid, which will then pass through the through hole 405 on the buffer plate 403, thus forming a damping mechanism. This provides damping protection for the filter plate 304. Through the two-layer protection of the filter plate 304, the water surface fluctuation caused by the impact force of the liquid outlet 105 is buffered in multiple stages, thereby reducing the fluctuation of the water surface when entering the monitoring area of ​​the float-type level gauge, slowing down the rate of water level change, and enabling the float-type level gauge to obtain relatively stable water level data, thereby improving the accuracy of water level monitoring in the filter tank 101.

[0036] Example 3

[0037] Please see Figure 2 This embodiment is a further explanation of other embodiments. The bottom of the filter tank 101 in the figure is provided with a plurality of interconnected installation pipes 501. The side wall of each installation pipe 501 is provided with a plurality of aeration heads 502. The side wall of the filter tank 101 is provided with an air inlet pipe 503. One end of the air inlet pipe 503 is connected to one of the installation pipes 501, and the other end of the air inlet pipe 503 is connected to an external high-pressure air pump.

[0038] It should be noted that by setting up multiple aeration heads 502, air can be periodically introduced into the filter tank 101. The generated bubbles drive the water flow on the surface of the membrane body 103 as they rise, forming a gas-liquid two-phase flow. This gas-liquid two-phase flow can effectively flush the surface of the membrane body 103, prevent pollutants from depositing on the surface of the membrane body 103, extend the service life of the membrane body 103, and also help improve the filtration efficiency of the membrane body 103 and reduce energy consumption.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An energy-saving adaptive submerged ultrafiltration membrane filtration device, comprising: A filter (101) and a frame (102) fixedly connected to the side wall of the filter (101). Multiple membrane bodies (103) are detachably installed inside the frame (102). An L-shaped plate (104) is fixedly connected to the liquid inlet end of the filter (101). The L-shaped plate (104) is provided with a liquid inlet pipe (105). A control valve is provided on the side wall of the liquid inlet pipe (105). A suction pump (106) is provided on the bottom side wall of the filter (101). Its characteristic is that it further includes: A control component installed in the filter (101) is used to adaptively control the inflow rate of the inlet pipe (105) and the outflow rate of the suction pump (106). The control assembly includes a fixed plate (201) fixedly connected to the filter tank (101) near the inlet pipe (105). The fixed plate (201) is equipped with a float-type liquid level gauge, which consists of a housing (202) and a measuring element disposed in the housing (202). A connecting rod (203) is fixedly connected to one side of the housing (202), and a ball (204) is slidably connected to the side wall of the connecting rod (203). The fixed plate (201) is equipped with a protective assembly for protecting the ball (204).

2. The energy-saving adaptive submerged ultrafiltration membrane filtration device according to claim 1, characterized in that: The float-type level gauge is electrically connected to the control valve and the suction pump (106) via a controller.

3. The energy-saving adaptive submerged ultrafiltration membrane filtration device according to claim 2, characterized in that: The protective assembly includes a U-shaped protective frame (301) fixedly connected to the fixed plate (201) on the side near the membrane body (103). A U-shaped hole (302) is provided on one side of the U-shaped protective frame (301). A U-shaped plate (303) is connected to the U-shaped hole (302) through a buffer assembly. A filter plate (304) is fixedly connected to the side of the U-shaped plate (303) away from the U-shaped protective frame (301).

4. The energy-saving adaptive submerged ultrafiltration membrane filtration device according to claim 3, characterized in that: The buffer assembly includes multiple buffer tubes (401) fixedly connected to the bottom wall of the U-shaped hole (302). Each buffer tube (401) is slidably connected to a buffer rod (402). One end of each buffer rod (402) is connected to a U-shaped plate (303). One end of each buffer rod (402) located inside the buffer tube (401) is fixedly connected to a buffer plate (403). One end of each buffer plate (403) away from the buffer rod (402) is fixedly connected to a spring (404). The other end of each spring (404) is connected to the bottom wall of the buffer tube (401).

5. The energy-saving adaptive submerged ultrafiltration membrane filtration device according to claim 4, characterized in that: Each of the buffer tubes (401) is filled with damping fluid, and each of the buffer plates (403) has multiple through holes (405) on its sidewall. The damping fluid flows through each through hole (405) under pressure.

6. The energy-saving adaptive submerged ultrafiltration membrane filtration device according to claim 5, characterized in that: The bottom of the filter tank (101) is provided with a plurality of interconnected installation pipes (501), and the side wall of each installation pipe (501) is provided with a plurality of aeration heads (502). The side wall of the filter tank (101) is provided with an air inlet pipe (503), one end of the air inlet pipe (503) is connected to one of the installation pipes (501), and the other end of the air inlet pipe (503) is connected to an external high-pressure air pump.

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