An automatic backwashing device for microfiltration membranes in MBR systems

Abstract

This utility model discloses an automatic backwashing device for microfiltration membranes in MBR systems. It includes a tank and a backwash pump. The tank holds the reagent, and the input end of the backwash pump is connected to the interior of the tank. An inlet is located on one side of the tank for pouring the reagent into the tank. A cleaning assembly is located inside the tank, and drive assemblies are located on both sides of the tank. The cleaning assembly includes a horizontal plate, a fixed pipe, and a movable plate. The horizontal plate is slidably connected to the top of the tank, and the fixed pipe is welded to one side of the tank. In this utility model, the cooperation between the swing plate and the movable shaft causes the swing plate to swing, pushing the movable shaft and causing the scraper to move longitudinally. The scraper then removes residual reagent from the inner wall of the tank, thus preventing reagent residue, ensuring the preparation of new reagent, facilitating cleaning work for operators, and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment, and in particular to an automatic backwashing device for microfiltration membranes in MBR systems. Background Technology

[0002] In the operation of MBR (Membrane Bioreactor) systems, microfiltration membranes are the core separation components. Over time, the filtration of wastewater will cause the formation of a filter cake layer due to the adhesion of sludge, colloids, organic matter, etc., which leads to a decrease in membrane flux and an increase in operating resistance. Regular backwashing is required to restore membrane performance. At present, the industry widely adopts automatic backwashing devices to achieve efficient operation and maintenance. These devices typically include core components such as water / chemical storage containers, backwashing pumps, and control units. They can automatically complete the backwashing process through hydraulic backwashing or chemical-assisted backwashing, reducing manual intervention.

[0003] In existing automatic backwashing devices, water tanks are often used as containers for storing and temporarily preparing chemicals, such as sodium hypochlorite and citric acid. These tanks are then used in conjunction with backwash pumps to deliver the chemicals to the membrane modules. However, in practical applications, many backwash chemicals are corrosive or sticky, leaving chemical residues and contaminants on the inner wall of the tank after use. Furthermore, the tanks are often one-piece molded structures, making it difficult to thoroughly clean the internal corners and interfaces. Residual chemicals not only contaminate the newly prepared chemicals, leading to concentration deviations and affecting the backwashing effect, but may also accelerate the aging and damage of the tank itself. In addition, manual cleaning of residues requires disassembling the tank and repeatedly rinsing it, which is time-consuming and labor-intensive, increasing maintenance costs and system downtime, making it difficult to meet the requirements for continuous and stable operation of MBR systems. Summary of the Invention

[0004] The main purpose of this invention is to provide an automatic backwashing device for microfiltration membranes in MBR systems, which aims to solve the problem of residual chemicals in the water tank that are difficult to clean.

[0005] To achieve the above objectives, this utility model proposes an automatic backwashing device for microfiltration membranes in an MBR system, comprising a tank body for holding reagents, a backwash pump located on one side of the tank body with its input end connected to the tank body, the backwash pump for conveying reagents from the tank body to the membrane module, and a cleaning assembly comprising a horizontal plate and a movable plate. The horizontal plate is slidably disposed on one side of the tank body, and the movable plate is slidably disposed on the outside of the tank body. A connecting rod is provided on one side of the horizontal plate, one end of which extends into the tank body and is fixedly disposed with a scraper. The outer side of the scraper contacts the inner wall of the tank body. When moved, it will scrape off the residual medicine on the inner wall of the barrel, thus avoiding medicine residue. Two sets of connecting plates are provided on one side of the horizontal plate, and a movable shaft is provided on one side of the connecting plate. A swing plate is slidably provided on the outer side of the movable shaft. The swing plate is inclined. The side of the swing plate away from the movable shaft is rotatably located on one side of the barrel, and a protrusion is provided on one side of the swing plate. The protrusion is semi-elliptical. Two sets of pulleys are rotatably provided on one side of the movable plate, and the outer side of the pulleys contacts one side of the protrusion. Two sets of fixed plates and two sets of drive components are provided on one side of the movable plate. The drive components are located on one side of the barrel.

[0006] Preferably, the inside of the horizontal plate is provided with two sets of limiting rods, one end of which is located on one side of the barrel.

[0007] Preferably, two sets of first springs are provided on one side of the horizontal plate, and the end of the first spring away from the horizontal plate is fixedly disposed on one side of the barrel body.

[0008] Preferably, a fixed tube is provided on one side of the barrel, and a fixed shaft is provided inside the fixed tube. The side of the swing plate away from the movable shaft is rotatably arranged on the outside of the fixed shaft.

[0009] Preferably, two sets of balance bars are provided on one side of the barrel, and the movable plate is slidably disposed on the outside of the two sets of balance bars.

[0010] Preferably, a disc is provided on the outer side of the balance bar, and a second spring is provided on one side of the disc, with the end of the second spring away from the disc fixedly disposed to the movable plate.

[0011] Preferably, two sets of central shafts are provided on one side of the movable plate, and the pulleys are rotatably located on the outside of the central shafts.

[0012] Preferably, the drive assembly includes a mounting base disposed on one side of the barrel body. A rotary motor is disposed on one side of the mounting base. A threaded pipe is key-connected to the output end of the rotary motor. A sleeve is screwed onto the outer side of the threaded pipe. A top block is disposed on the outer side of the sleeve. The side of the top block away from the sleeve contacts a fixing plate.

[0013] In the technical solution of this utility model, through the cooperation between the swing plate and the movable shaft, the scraper will be pushed longitudinally by pushing the movable shaft when the swing plate swings. At this time, the scraper will scrape off the residual medicine on the inner wall of the barrel, thereby avoiding the residue of medicine, ensuring the subsequent preparation of new medicine, and providing convenience for the operator's cleaning work, reducing the operation and maintenance cost. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the automatic backwashing device for microfiltration membranes in an MBR system according to the present invention. Figure 2 This is a partial structural cross-sectional view of the protective cover and tank of the automatic backwashing device for microfiltration membranes in MBR systems according to this utility model; Figure 3 This is a schematic diagram of the cleaning component of the automatic backwashing device for microfiltration membranes in an MBR system according to this utility model. Figure 4 This is a schematic diagram of the structure of the swing plate of the automatic backwashing device for microfiltration membranes in MBR systems according to this utility model; Figure 5 This is a schematic diagram of the movable plate of the automatic backwashing device for microfiltration membranes in MBR systems according to this utility model; Figure 6 This is a schematic diagram of the drive assembly of the automatic backwashing device for microfiltration membranes in MBR systems according to this invention.

[0016] Reference numerals: 1. Barrel body; 2. Cleaning assembly; 201. Horizontal plate; 202. First spring; 203. Limiting rod; 204. Connecting rod; 205. Scraper; 206. Connecting plate; 207. Fixed pipe; 208. Fixed shaft; 209. Buffer pad; 210. Movable shaft; 211. Protrusion; 212. Swing plate; 213. Central shaft; 214. Pulley; 215. Fixed plate; 216. Movable plate; 217. Balance bar; 218. Second spring; 219. Disc; 3. Drive assembly; 301. Rotary motor; 302. Threaded pipe; 303. Top block; 304. Sleeve; 305. Mounting base; 4. Backwash pump; 5. Protective cover; 6. Inlet.

[0017] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. 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. 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.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] This invention provides an automatic backwashing device for microfiltration membranes in MBR systems.

[0023] like Figures 1 to 6 As shown, the automatic backwashing device for microfiltration membranes in MBR systems provided in this embodiment of the present invention includes a tank 1 and a backwashing pump 4. The tank 1 is used to carry the reagent. The input end of the backwashing pump 4 is connected to the inside of the tank 1. The backwashing pump 4 is used to transport the reagent in the tank 1 to the membrane module. An inlet 6 is provided on one side of the tank 1. The inlet 6 is used to pour the reagent into the tank 1. A cleaning component 2 is provided inside the tank 1. A drive component 3 is provided on both sides of the tank 1.

[0024] like Figures 1 to 5As shown, the cleaning component 2 includes a horizontal plate 201, a fixed tube 207, and a movable plate 216. The horizontal plate 201 is slidably connected to the top of the barrel 1. The fixed tube 207 is welded to one side of the barrel 1. The movable plate 216 is slidably connected to the outside of the barrel 1. A connecting rod 204 is welded to the bottom of the horizontal plate 201. The bottom end of the connecting rod 204 extends into the barrel 1 and is welded to a scraper 205. The outside of the scraper 205 contacts the inner wall of the barrel 1. Two sets of connecting plates 206 are welded to the bottom of the horizontal plate 201. A movable shaft 210 is welded to one side of the connecting plate 206. The fixed tube 207... The fixed shaft 208 is welded internally. Two sets of swing plates 212 are rotatably connected to the outside of the fixed shaft 208. The side of the swing plate 212 away from the fixed shaft 208 is slidably connected to the outside of the movable shaft 210. The swing plate 212 is inclined and a protrusion 211 is welded to one side of the swing plate 212. The protrusion 211 is semi-elliptical. Two sets of central shafts 213 are welded to one side of the movable plate 216. A pulley 214 is rotatably connected to the outside of the central shaft 213. The outside of the pulley 214 contacts the side of the protrusion 211. A fixed plate 215 is welded to the bottom of the movable plate 216.

[0025] Specifically, in order to maintain the balance of the horizontal plate 201, two sets of limiting rods 203 are slidably connected inside the horizontal plate 201. The bottom end of the limiting rod 203 is welded to the top of the barrel body 1. Thus, on the one hand, the limiting rod 203 maintains the balance of the horizontal plate 201 during movement, preventing the horizontal plate 201 from becoming unbalanced and swaying during movement, and ensuring the normal displacement of the horizontal plate 201. On the other hand, the limiting rod 203 restricts the direction of the horizontal plate 201, preventing the device from failing due to misalignment of the horizontal plate 201, and ensuring the normal use of the device.

[0026] Meanwhile, in order to enable the horizontal plate 201 to move back quickly, two sets of first springs 202 are welded on one side of the horizontal plate 201. The end of the first spring 202 away from the horizontal plate 201 is welded to one side of the barrel body 1. Thus, when the horizontal plate 201 is pushed, the first spring 202 will be squeezed by the horizontal plate 201, and when the horizontal plate 201 is no longer pushed, the first spring 202 will bounce the horizontal plate 201 back quickly.

[0027] Furthermore, in order to prevent the horizontal plate 201 from detaching from the limiting rod 203, a buffer pad 209 is fixedly connected to the outside of the limiting rod 203. The buffer pad 209 is made of rubber and is located on the side of the horizontal plate 201 away from the first spring 202. Thus, the buffer pad 209 can block the horizontal plate 201 and prevent the horizontal plate 201 from excessively shifting back and detaching from the limiting rod 203.

[0028] Specifically, in order to prevent the movable plate 216 from being misaligned, two sets of balance bars 217 are welded on one side of the barrel 1, and the movable plate 216 is slidably connected to the outside of the two sets of balance bars 217. As a result, the movable plate 216 will move linearly along the outside of the balance bars 217, thus avoiding misalignment of the movable plate 216.

[0029] Meanwhile, in order to enable the movable plate 216 to move back quickly, a disc 219 is welded to the outside of the balance bar 217, and a second spring 218 is welded between the disc 219 and the movable plate 216. Thus, when the movable plate 216 is pushed, the second spring 218 will be squeezed by the movable plate 216, and when the movable plate 216 is no longer pushed, the second spring 218 will bounce the movable plate 216 back to the initial position quickly.

[0030] When the fixed plate 215 is pushed, the fixed plate 215 will push the movable plate 216 to move laterally. The movement of the movable plate 216 will drive the pulley 214 to move by driving the central shaft 213. The displacement of the pulley 214 will push the swing plate 212 by pushing the protrusion 211. At this time, the swing plate 212 will swing around the fixed shaft 208 as the axis. At the same time, one side of the swing plate 212 will push the movable shaft 210 to move downward during the swing. The movement of the movable shaft 210 will push the horizontal plate 201 to move longitudinally by pushing the connecting plate 206. The movement of the horizontal plate 201 will drive the scraper 205 to move through the connecting rod 204. The longitudinal movement of the scraper 205 will scrape off the residual medicine on the inner wall of the barrel 1.

[0031] like Figure 1 , Figure 2 and Figure 6 As shown, the drive assembly 3 includes a mounting base 305, which is bolted to one side of the barrel 1. A rotary motor 301 is bolted to one side of the mounting base 305. The rotary motor 301 is a bidirectional motor, and its output end can rotate forward or backward. A threaded tube 302 is keyed to the output end of the rotary motor 301. A sleeve 304 is threaded onto the outer side of the threaded tube 302. The sleeve 304 has a threaded hole inside that matches the thread on the outer side of the threaded tube 302. A top block 303 is welded to the outer side of the sleeve 304. The side of the top block 303 away from the sleeve 304 contacts the fixing plate 215. The outer side of the mounting base 305 is bolted with a protective cover 5. The protective cover 5 is used to protect the rotary motor 301 and the threaded tube 302. After the rotary motor 301 is turned on, the output end of the rotary motor 301 will drive the threaded tube 302 to rotate. The rotation of the threaded tube 302 will drive the sleeve 304 to move linearly. The displacement of the sleeve 304 will drive the top block 303 to move. The displacement of the top block 303 will push the fixing plate 215 to move laterally.

[0032] In the technical solution of this utility model, through the cooperation between the swing plate 212 and the movable shaft 210, the swing plate 212 will push the movable shaft 210 to push the scraper 205 to move longitudinally when it swings. At this time, the scraper 205 will scrape off the residual medicine on the inner wall of the barrel 1, thereby avoiding the residue of medicine, ensuring the subsequent preparation of new medicine, and providing convenience for the cleaning work of the operator, reducing the operation and maintenance cost.

[0033] During cleaning, the rotary motor 301 is turned on, causing its output end to drive the threaded tube 302 to rotate. The rotation of the threaded tube 302 will cause the sleeve 304 to move linearly. The displacement of the sleeve 304 will cause the top block 303 to move. The displacement of the top block 303 will push the fixed plate 215 to move laterally. When the fixed plate 215 is pushed, it will push the movable plate 216 to move laterally. The movement of the movable plate 216 will drive the pulley 214 to move by driving the central shaft 213. The displacement will push the swing plate 212 by pushing the protrusion 211. At this time, the swing plate 212 will swing around the fixed shaft 208. At the same time, one side of the swing plate 212 will push the movable shaft 210 downward during the swing. The movement of the movable shaft 210 will push the horizontal plate 201 to move longitudinally by pushing the connecting plate 206. The movement of the horizontal plate 201 will drive the scraper 205 to move through the connecting rod 204. The longitudinal movement of the scraper 205 will scrape off the residual medicine on the inner wall of the barrel 1.

[0034] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. An automatic backwashing device for microfiltration membranes in MBR systems, characterized in that, include: Barrel body (1); A backwash pump (4) is located on one side of the tank (1), and the input end of the backwash pump (4) is connected to the tank (1). Cleaning assembly (2), comprising a horizontal plate (201) and a movable plate (216), wherein the horizontal plate (201) is slidably disposed on one side of the barrel body (1), and the movable plate (216) is slidably disposed on the outside of the barrel body (1), wherein a connecting rod (204) is provided on one side of the horizontal plate (201), one end of the connecting rod (204) extends into the barrel body (1) and is fixedly disposed with a scraper (205), wherein two sets of connecting plates (206) are provided on one side of the horizontal plate (201), and one side of the connecting plate (206) A movable shaft (210) is provided, and a swing plate (212) is slidably provided on the outer side of the movable shaft (210). The side of the swing plate (212) away from the movable shaft (210) is rotatably provided on one side of the barrel body (1), and a protrusion (211) is provided on one side of the swing plate (212). Two sets of pulleys (214) are rotatably provided on one side of the movable plate (216), and the outer side of the pulleys (214) contacts one side of the protrusion (211). Two sets of fixed plates (215) are provided on one side of the movable plate (216). Two sets of drive components (3) are arranged on one side of the barrel body (1).

2. The automatic backwashing device for microfiltration membranes in MBR systems according to claim 1, characterized in that, The inside of the horizontal plate (201) is slidably provided with two sets of limiting rods (203), one end of which is located on one side of the barrel body (1).

3. The automatic backwashing device for microfiltration membranes in MBR systems according to claim 1, characterized in that, Two sets of first springs (202) are provided on one side of the horizontal plate (201), and the end of the first spring (202) away from the horizontal plate (201) is fixedly installed on one side of the barrel body (1).

4. The automatic backwashing device for microfiltration membranes in MBR systems according to claim 1, characterized in that, A fixed tube (207) is provided on one side of the barrel (1), and a fixed shaft (208) is provided inside the fixed tube (207). The swing plate (212) is rotatably arranged on the side away from the movable shaft (210) outside the fixed shaft (208).

5. The automatic backwashing device for microfiltration membranes in MBR systems according to claim 1, characterized in that, Two sets of balance bars (217) are provided on one side of the barrel (1), and the movable plate (216) is slidably disposed on the outside of the two sets of balance bars (217).

6. The automatic backwashing device for microfiltration membranes in MBR systems according to claim 5, characterized in that, A disc (219) is provided on the outer side of the balance bar (217), and a second spring (218) is provided on one side of the disc (219). The end of the second spring (218) away from the disc (219) is fixedly disposed with the movable plate (216).

7. The automatic backwashing device for microfiltration membranes in MBR systems according to claim 1, characterized in that, Two sets of central shafts (213) are provided on one side of the movable plate (216), and the pulley (214) is rotatably arranged on the outside of the central shaft (213).

8. The automatic backwashing device for microfiltration membranes in MBR systems according to claim 1, characterized in that, The drive assembly (3) includes a mounting base (305) which is disposed on one side of the barrel (1). A rotary motor (301) is disposed on one side of the mounting base (305). A threaded tube (302) is keyed to the output end of the rotary motor (301). A sleeve (304) is screwed onto the outside of the threaded tube (302). A top block (303) is disposed on the outside of the sleeve (304). The side of the top block (303) away from the sleeve (304) contacts the fixing plate (215).

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