Membrane module cleaning device

Abstract

The present invention provides a membrane assembly cleaning device, comprising a frame, a controller, a membrane box arranged in the frame, and a cleaning mechanism for cleaning the membrane box; the membrane box comprises a main flow pipe, a membrane assembly, and a plurality of support assemblies longitudinally arranged on the main flow pipe, and the two ends of the membrane assembly are respectively fixed at the upper and lower ends of the above-mentioned support assembly; the cleaning mechanism comprises a slide rail arranged on the side of the frame, a longitudinal flushing pipe erected between the slide rails, and a first drive assembly, the first drive assembly is used to drive the longitudinal flushing pipe to slide on the slide rail, and a longitudinal flushing pipe is extended between every two adjacent membrane assemblies during cleaning, and a plurality of nozzles are arranged on the longitudinal flushing pipe, the nozzles are directly facing the membrane assemblies, and the longitudinal flushing pipe is connected to the main flow pipe; the controller is electrically connected to the first drive assembly. The membrane assembly cleaning device proposed by the present invention can directly clean the membrane assembly without disassembling the membrane box or the membrane assembly in the membrane box, thereby greatly improving the cleaning efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a membrane component cleaning device. Background Art

[0002] Membranes are materials with selective separation functions. According to the size of the membrane filtration pores, they can be divided into microfiltration membranes, nanofiltration membranes, ultrafiltration membranes and reverse osmosis membranes. Membranes are also widely used in MBR sewage treatment processes because of their unique selective separation functions. Generally, membrane separation devices are made of membrane materials, and the selective separation function of the membrane replaces the secondary sedimentation tank to achieve mud and water separation.

[0003] When membrane separation technology is actually used, the membrane materials are fixed and assembled into membrane modules. The forms of membrane modules are: flat plate, roll, tube and hollow fiber. Among them, hollow fiber membrane modules are widely used due to their large specific surface area, high efficiency and easy cleaning. The commonly used hollow fiber membrane module consists of a square frame in which the hollow fiber membrane is fixed, and a certain number of hollow fiber membrane modules are evenly fixed in the membrane box to form a rectangular membrane box as a whole.

[0004] During use, due to membrane contamination, the membrane assembly needs to be cleaned regularly. At this time, the membrane assembly in the membrane box needs to be removed, cleaned and then installed back into the membrane box. However, the operation of disassembling the membrane assembly is extremely complicated and time-consuming, resulting in low efficiency in cleaning the membrane assembly. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a membrane module cleaning device to solve the problem of low working efficiency caused by traditional membrane module cleaning methods.

[0006] A membrane module cleaning device comprises a frame, a controller, a membrane box arranged in the frame, and a cleaning mechanism for cleaning the membrane box;

[0007] The membrane box comprises a main flow pipe, a membrane assembly and a plurality of support assemblies longitudinally arranged on the main flow pipe, and the two ends of the membrane assembly are respectively fixed to the upper and lower ends of the support assembly;

[0008] The cleaning mechanism includes a slide rail arranged on the side of the frame, a longitudinal flushing pipe erected between the slide rails and a first driving component. The controller is electrically connected to the first driving component. The first driving component is used to drive the longitudinal flushing pipe to slide back and forth on the slide rail. During cleaning, the longitudinal flushing pipe is sequentially or simultaneously extended between every two adjacent membrane components. A plurality of nozzles are provided on the longitudinal flushing pipe. The nozzles are directly facing the membrane components. The longitudinal flushing pipe is connected to the mainstream pipe.

[0009] According to the above-mentioned membrane assembly cleaning device, by setting a longitudinal flushing pipe to slide back and forth between adjacent membrane assemblies, the nozzle provided on the longitudinal flushing pipe can directly and repeatedly flush the membrane assembly without disassembling the membrane assembly, thereby greatly improving the efficiency of flushing work. Specifically, by setting a slide rail on the side of the frame, the longitudinal flushing pipe is set between the slide rails and can slide back and forth on the slide rails, and the longitudinal flushing pipe is connected to the mainstream pipe, so that the water used for flushing can flow from the mainstream pipe to the longitudinal flushing pipe. When flushing is required, the first drive assembly is operated to make the longitudinal flushing pipe extend between the membrane assemblies to achieve cleaning work. In summary, the membrane assembly cleaning device proposed in the present invention does not need to disassemble the membrane box or the membrane assembly in the membrane box, and can directly clean the membrane assembly, which solves the problem of low working efficiency of traditional cleaning methods.

[0010] Furthermore, a second drive assembly is provided at the end of the frame, and the second drive assembly includes a rotating motor fixed on the frame and a transmission shaft fixedly connected to the rotating motor, the transmission shaft is connected to the main flow pipe through a mounting structure, and the controller is electrically connected to the rotating motor.

[0011] Furthermore, the second drive component also includes a timer and a membrane pressure monitor, and the controller is electrically connected to the timer and the membrane pressure monitor respectively. The membrane pressure monitor is used to detect the membrane pressure of the membrane assembly, and the timer is used to detect the time signal of the longitudinal flushing pipe flushing between two adjacent membrane assemblies. The controller is used to control the switch of the rotating motor according to the time signal to rotate the membrane assembly.

[0012] Furthermore, the mounting structure includes a protrusion arranged at the end of the mainstream pipe and a connecting ring arranged on the end of the transmission shaft, a first through hole is arranged in the middle of the protrusion, and a second through hole and a third through hole are respectively arranged on both sides of the connecting ring, and bolts are sequentially passed through the first through hole, the second through hole, and the third through hole to fix the transmission shaft to the mainstream pipe.

[0013] Furthermore, the membrane assembly includes a membrane sheet and water collecting pipes arranged at both ends of the membrane sheet, and the water collecting pipes are threadedly connected to the main flow pipe.

[0014] Furthermore, two nozzles are provided at the same height of the longitudinal flushing pipe, and the water outlet direction of the nozzles is perpendicular to the diaphragm.

[0015] Furthermore, the inner diameter of the water collecting pipe is smaller than the inner diameter of the main flow pipe.

[0016] Furthermore, a slider is provided on the slide rail, the slider is movably connected to the slide rail, the longitudinal flushing pipe is arranged between the sliders, the first driving component includes a cylinder for driving the longitudinal flushing pipe to slide and a solenoid valve for controlling the operation of the cylinder, and the solenoid valve is electrically connected to the controller.

[0017] Furthermore, a transmission rod is provided at the end of the cylinder, and the transmission rod includes a vertical rod and a cross rod fixedly connected to the vertical rod, the other end of the vertical rod is fixedly connected to the cylinder, and the other end of the cross rod is fixedly connected to the slider.

[0018] Furthermore, one end of the longitudinal flushing pipe is connected to a hose, and the hose is connected to the main flow pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a membrane module cleaning device in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the main flow pipe and the rotating motor;

[0021] Figure 3 for Figure 1 Schematic diagram of the structure of the longitudinal flushing pipe;

[0022] Figure 4 for Figure 1 Structural diagram of the middle cylinder, longitudinal cleaning pipe, upper slide rail and lower slide rail;

[0023] Figure 5 for Figure 1 Schematic diagram of the structure of the middle film box.

[0024] Description of main component symbols:

[0025] Membrane module cleaning device 100 Membrane box 10 Membrane Module 101 Support components 102 Mainstream pipe 103 Lower slide rail 20 Upper slide rail 30 Rotating electric machines 40 Longitudinal flushing pipe 50 Bump 1031 bolt 1032 slider 201 transmission shaft 60 Vertical bar 70 Crossbar 80 cylinder 90 Nozzle 501

[0026] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] See also Figures 1 to 5 , which is a schematic structural diagram of a membrane module cleaning device 100 in a first embodiment of the present invention, comprises a frame and a membrane box 10 arranged in the frame, a cleaning mechanism for cleaning the membrane box 10, and a controller, wherein:

[0031] The membrane box 10 includes a main flow pipe 103, a membrane assembly 101, and a plurality of support assemblies 102 longitudinally arranged on the main flow pipe 103, and the two ends of the membrane assembly 101 are respectively fixed to the upper and lower ends of the above-mentioned support assembly 102. In this embodiment, the membrane box 10 is cylindrical, the main flow pipe 103 is also cylindrical and longitudinally arranged at the center of the membrane box 10, and the support assemblies 102 are evenly arranged on the side of the main flow pipe 103, and the support assemblies 102 are used to fix the membrane assembly 101.

[0032] The cleaning mechanism includes a slide rail arranged on the side of the frame, a longitudinal flushing pipe 50 mounted between the slide rails, and a first driving component. In the present embodiment, the slide rail includes an upper slide rail 30 arranged on the side of the upper end of the frame and a lower slide rail 20 arranged on the side of the lower end of the frame. The longitudinal flushing pipe 50 is arranged between the upper slide rail 30 and the lower slide rail 20. The controller is electrically connected to the first driving component. The controller is used to control the switch of the first driving component so that the first driving component drives the longitudinal flushing pipe 50 to slide back and forth on the slide rail. During cleaning, a longitudinal flushing pipe 50 is sequentially or simultaneously extended between every two adjacent membrane components 101. A plurality of nozzles 501 are arranged on the longitudinal flushing pipe 50. The nozzles 501 are directly facing the membrane components 101. The longitudinal flushing pipe 50 is connected to the water collecting pipe in the mainstream pipe 103.

[0033] According to the above-mentioned membrane assembly cleaning device 100, by setting the longitudinal flushing pipe 50 to slide back and forth between adjacent membrane assemblies 101, the nozzle 501 arranged on the longitudinal flushing pipe 50 can directly flush the membrane assembly 101 repeatedly without disassembling the membrane assembly 101, thereby greatly improving the flushing work efficiency.

[0034] Furthermore, in order to achieve the purpose of allowing the longitudinal flushing pipe 50 to extend in sequence between every two adjacent membrane components 101 so that all the membrane components 101 in the membrane box 10 can be automatically cleaned, a second drive assembly is provided at the end of the frame, and the second drive assembly includes a rotating motor 40 fixed on the frame, and a transmission shaft 60 fixedly connected to the rotating motor 40, the transmission shaft 60 is connected to the mainstream pipe 103 through an installation structure, and the controller is electrically connected to the rotating motor 40. The controller controls the operation of the rotating motor 40 to drive the transmission shaft 60 to rotate. Since the transmission shaft 60 is fixedly connected to the mainstream pipe 103, the mainstream pipe 103 and even the entire membrane box 10 rotate accordingly. When two adjacent membrane components are cleaned, the membrane box 10 rotates so that the longitudinal flushing pipe 50 can extend between the other two adjacent membrane components 101. This process is repeated continuously, thereby automatically completing the cleaning of all membrane components 101 in the membrane box 10, which is simple and efficient.

[0035] Furthermore, in this embodiment, the mounting structure includes a protrusion 1031 provided on the end of the mainstream pipe and a connecting ring provided on the end of the transmission shaft, the connecting ring is U-shaped, a first through hole is provided in the middle of the protrusion 1031, and a second through hole and a third through hole are provided on both sides of the connecting ring, respectively. Bolts 1032 are sequentially passed through the first through hole, the second through hole, and the third through hole to fix the transmission shaft 60 to the mainstream pipe 103. By setting the mounting structure, the entire membrane box 10 can be detached relative to the membrane assembly cleaning device 100, which is convenient for subsequent maintenance work.

[0036] It should be pointed out that the number of longitudinal flushing pipes 50 can be one or more. If the number of longitudinal flushing pipes 50 is small, the frequency of the driving motor to drive the membrane box 10 to rotate will be higher, thereby affecting the flushing efficiency. If the number of longitudinal flushing pipes 50 is too large, it will be unfavorable for the design of the longitudinal flushing pipes 50 in terms of water inlet. Therefore, the optimal number of longitudinal flushing pipes 50 is generally 2-5. In other embodiments of the present invention, a longitudinal flushing pipe 50 can also be set between every two adjacent membrane components 101, so that a longitudinal flushing pipe 50 is extended between every two adjacent membrane components 101 at the same time during flushing. In this case, there is no need to set a rotating motor 40 to drive the membrane box 10 to rotate.

[0037] Specifically, one end of the longitudinal flushing pipe 50 is connected to a hose, and the hose is connected to the water collecting pipe in the mainstream pipe 103. By setting a hose between the longitudinal flushing pipe 50 and the mainstream pipe 103, the longitudinal flushing pipe 50 is prevented from being directly connected to the mainstream pipe 103, which can reduce the interference of the longitudinal flushing pipe 50 in water inlet when the membrane box 10 rotates.

[0038] Furthermore, the second drive component also includes a timer and a membrane pressure monitor. The controller is electrically connected to the timer and the membrane pressure monitor, respectively. The membrane pressure monitor is used to detect the membrane pressure of the membrane assembly 101. It is easy for those skilled in the art to understand that when the membrane assembly 101 treats sewage, the cleanliness of the current membrane assembly 101 can be judged in real time by real-time monitoring of the membrane pressure of the membrane assembly 101. The controller judges whether the membrane assembly 101 needs to be cleaned according to the membrane pressure value fed back by the membrane pressure monitor. Specifically, the membrane pressure of the membrane assembly 101 is generally negative pressure. When the membrane pressure of the membrane assembly 101 is between -10KPa and -50KPa, it indicates that the cleanliness of the membrane assembly 101 is good. If the membrane pressure of the membrane assembly 101 is below -50KPa, it indicates that the membrane assembly 101 needs to be cleaned. At this time, the controller controls the entire membrane assembly cleaning device 100 to start, and performs self-inspection of the cleanliness of the membrane assembly 101 by setting the membrane pressure monitor, so as to realize automatic cleaning of the membrane assembly 101 without manual management, thereby greatly improving work efficiency and reducing maintenance costs.

[0039] In addition, the timer is used to detect the time signal of the longitudinal flushing pipe 50 flushing between two adjacent membrane assemblies 101, and the controller is used to control the switch of the rotating motor 40 according to the time signal to rotate the membrane assembly 101. When the timer detects that the time for the longitudinal flushing pipe 50 to flush back and forth between two adjacent membrane assemblies 101 reaches a preset threshold, in this embodiment, the preset threshold is set to 30s, that is, when the flushing time of the nozzle 501 on the longitudinal flushing pipe 50 for the same membrane assembly 101 reaches 30s, the controller controls the rotating motor 40 to rotate, thereby driving the membrane box 10 to rotate, so as to transfer the membrane assembly 101 that has not been flushed to the longitudinal flushing pipe 50, and repeat this operation to complete the cleaning of all membrane assemblies 101 on the membrane box 10.

[0040] Furthermore, a slider 201 is provided on the slide rail, and the slider 201 is movably connected to the slide rail. The longitudinal flushing pipe 50 is arranged between the sliders 201. The first driving component includes a cylinder 90 for driving the longitudinal flushing pipe 50 to slide and a solenoid valve for controlling the operation of the cylinder 90. The solenoid valve is electrically connected to the controller. When the controller receives an instruction to flush, the controller controls the solenoid valve to open, and the cylinder 90 starts to extend and retract back and forth to drive the longitudinal flushing pipe 50 to slide back and forth on the slide rail to ensure that the membrane assembly 101 is fully cleaned.

[0041] Specifically, in order to achieve effective transmission between the cylinder 90 and the longitudinal flushing pipe 50, a transmission rod is also provided at the end of the cylinder 90, and the transmission rod includes a vertical rod 70 and a cross rod 80 fixedly connected to the vertical rod 70. The other end of the vertical rod 70 is fixedly connected to the cylinder 90, and the other end of the cross rod 80 is fixedly connected to the slider 201. In this embodiment, a cross rod 80 is connected to the left and right sides of the slider 201 arranged on the lower sliding rail 20, that is, a double cylinder 90 is provided to drive the longitudinal flushing pipe 50 to slide back and forth.

[0042] Furthermore, the membrane assembly 101 includes a diaphragm and a water collecting pipe arranged at both ends of the diaphragm, the water collecting pipe is screwed to the main pipe 103, in this embodiment, the water collecting pipe is U-shaped, and the inner diameter of the water collecting pipe is smaller than the inner diameter of the main pipe 103, the upper and lower ends of the diaphragm are respectively connected to the two sides of the U-shaped water collecting pipe, the water collecting pipe is connected to the main pipe 103, and the sewage is separated and treated by the membrane assembly 101 and flows into the main pipe 103 through the water collecting pipe, and then flows into a clean water tank connected to the main pipe 103 through the main pipe 103. In specific implementation, the membrane in the diaphragm can be made of any one of a flat membrane and a hollow fiber membrane, and the user can make a choice according to actual conditions.

[0043] Furthermore, two nozzles 501 are provided at the same height of the longitudinal flushing pipe 50, and the water outlet direction of the nozzle 501 is perpendicular to the diaphragm. When the membrane assembly 101 needs to be cleaned, the mud and water mixture in the membrane box 10 is discharged below the membrane wire. At the same time, the membrane box 10 starts to rotate and the pressurized water pump is turned on. The cleaning water pressure is 100-200 kPa, so that the nozzle 501 can discharge high-pressure water to ensure that the diaphragm is more fully cleaned. It should be pointed out that when collecting the treated water or providing water to the longitudinal flushing pipe 50, it will pass through the mainstream pipe 103, that is, there is no need to set up another water tank for water supply, thereby saving the production cost of the membrane assembly cleaning device 100.

[0044] According to the membrane assembly cleaning device 100 proposed in the present invention, a longitudinal flushing pipe 50 is set to slide back and forth between adjacent membrane assemblies 101, so that the nozzle 501 arranged on the longitudinal flushing pipe 50 can directly and repeatedly flush the membrane assembly 101, and at the same time a second driving assembly is set to rotate the membrane box 10, so that the longitudinal flushing pipe 50 can sequentially clean two adjacent membrane assemblies 101, thereby automatically completing the cleaning work of all membrane assemblies 101, without the need to disassemble the membrane assembly 101, and greatly improving the flushing work efficiency. Specifically, a slide rail is set on the side of the frame, and the longitudinal flushing pipe 50 is set to rotate the membrane box 10, so that the longitudinal flushing pipe 50 can clean two adjacent membrane assemblies 101 in turn. The longitudinal flushing pipe 50 is arranged between the slide rails and can slide back and forth on the slide rails, and the longitudinal flushing pipe 50 is connected to the main flow pipe 103, so that the water used for flushing can flow from the main flow pipe 103 to the longitudinal flushing pipe 50. When flushing is required, the first drive assembly operates to make the longitudinal flushing pipe 50 extend between the membrane components 101 to achieve the cleaning work. At the same time, the controller controls the rotation of the rotary motor 40 to rotate, thereby driving the membrane box 10 to rotate, so as to transfer the membrane components 101 that have not been flushed to the longitudinal flushing pipe 50, and repeat this operation to complete the cleaning of all the membrane components 101 on the membrane box 10. In summary, the membrane component cleaning device 100 proposed by the present invention does not need to disassemble the membrane box 10 or the membrane components 101 in the membrane box 10, and can directly clean the membrane components 101, thereby solving the problem of low working efficiency of the traditional cleaning method.

[0045] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A membrane module cleaning device, comprising a frame, characterized in that: It also includes a controller, a membrane box arranged in the frame, and a cleaning mechanism for cleaning the membrane box; The membrane box comprises a main flow pipe, a membrane assembly and a plurality of support assemblies longitudinally arranged on the main flow pipe, and the two ends of the membrane assembly are respectively fixed to the upper and lower ends of the support assembly; The cleaning mechanism includes a slide rail arranged on the side of the frame, a longitudinal flushing pipe mounted between the slide rails, and a first driving component. The controller is electrically connected to the first driving component. The first driving component is used to drive the longitudinal flushing pipe to slide back and forth on the slide rail. During cleaning, the longitudinal flushing pipe is sequentially or simultaneously inserted between every two adjacent membrane assemblies. A plurality of nozzles are arranged on the longitudinal flushing pipe. The nozzles are directly facing the membrane assemblies. The longitudinal flushing pipe is connected to the mainstream pipe. A second driving assembly is provided at the end of the frame, the second driving assembly includes a timer, a rotating motor fixed on the frame, and a transmission shaft fixedly connected to the rotating motor, the transmission shaft is connected to the main flow pipe through a mounting structure, and the controller is electrically connected to the rotating motor and the timer respectively; The membrane assembly comprises a membrane sheet and water collecting pipes arranged at both ends of the membrane sheet, and the water collecting pipes are screwed to the main flow pipe.

2. The membrane module cleaning device according to claim 1, characterized in that: The second driving component also includes a timer and a membrane pressure monitor. The controller is electrically connected to the timer and the membrane pressure monitor respectively. The membrane pressure monitor is used to detect the membrane pressure of the membrane assembly. The timer is used to detect the time signal of the longitudinal flushing pipe flushing between two adjacent membrane assemblies. The controller is used to control the switch of the rotating motor according to the time signal to rotate the membrane assembly.

3. The membrane module cleaning device according to claim 1, characterized in that: The mounting structure includes a protrusion arranged at the end of the mainstream pipe and a connecting ring arranged on the end of the transmission shaft, a first through hole is arranged in the middle of the protrusion, and a second through hole and a third through hole are respectively arranged on both sides of the connecting ring, and bolts are sequentially inserted into the first through hole, the second through hole, and the third through hole to fix the transmission shaft to the mainstream pipe.

4. The membrane module cleaning device according to claim 1, characterized in that: Two nozzles are arranged at the same height of the longitudinal flushing pipe, and the water outlet direction of the nozzles is perpendicular to the membrane.

5. The membrane module cleaning device according to claim 1, characterized in that: The inner diameter of the water collecting pipe is smaller than the inner diameter of the main pipe.

6. The membrane module cleaning device according to claim 1, characterized in that: A slider is provided on the slide rail, and the slider is movably connected to the slide rail. The longitudinal flushing pipe is arranged between the sliders. The first driving component includes a cylinder for driving the longitudinal flushing pipe to slide and a solenoid valve for controlling the operation of the cylinder. The solenoid valve is electrically connected to the controller.

7. The membrane module cleaning device according to claim 6, characterized in that: A transmission rod is also provided at the end of the cylinder. The transmission rod includes a vertical rod and a cross rod fixedly connected to the vertical rod. The other end of the vertical rod is fixedly connected to the cylinder, and the other end of the cross rod is fixedly connected to the slider.

8. The membrane module cleaning device according to claim 1, characterized in that: One end of the longitudinal flushing pipe is connected to a hose, and the hose is communicated with the main flow pipe.

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