Lightweight vibrating membrane bioreactor system

Abstract

The present application provides a kind of light weight vibration type membrane bioreactor system, belong to sewage treatment equipment technical field, including driving mechanism and the vibration type membrane bioreactor driven by driving mechanism, vibration type membrane bioreactor includes hanger beam group system, hanger beam group system is connected by pressure pipe group system and pull rod group system water collection group system, water collection group system is equipped with membrane element;Driving mechanism is connected by the vibration type membrane bioreactor;Different displacement curves are realized by controller control driving mechanism output shaft, drive vibration type membrane bioreactor in the same direction according to different displacement curves linear reciprocating motion.The present application is connected by pre-stressed pull rod, pressure pipe and hinged connection mode, avoids the stress concentration and fatigue failure problem produced when original group device welding connection mode bears long-term alternating load, improves structural safety and reliability;The weight of group device is greatly reduced, realizes light weight, reduces operating energy consumption, reduces the overall equipment investment cost of user.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, specifically to a lightweight vibrating membrane bioreactor system. Background Technology

[0002] Vibration membrane bioreactor (V-MBR) technology is a newly emerging membrane bioreactor (MBR) technology in recent years. It uses mechanical vibration of the membrane module to replace bottom aeration to control membrane filament fouling. With its excellent energy-saving and consumption-reducing advantages (membrane tank energy consumption is reduced by more than 70% compared with aeration MBR technology), stronger total nitrogen removal performance (total nitrogen in effluent is less than 5 mg / L), and excellent resistance to membrane filament fouling (offline cleaning cycle is 8 to 12 months), it has become a practical technology with great application potential in the field of urban sewage and industrial wastewater treatment. Unlike the stress state of aerated MBR units, V-MBR units undergo horizontal reciprocating motion during operation and are subjected to alternating loads over a long period of time (taking the reciprocating unit as the reference frame, the unit is subjected to alternating driving forces, alternating fluid viscous resistance, and alternating inertial forces). Its structural safety and reliability, as well as low manufacturing costs and low operating energy consumption, are key factors determining whether this technology can be widely promoted.

[0003] However, current V-MBR reactor structures are mostly modified from aerated MBR reactor structures, primarily manufactured using profile welding processes. During operation, they suffer from two main problems: First, due to long-term, complex alternating loads, stress concentration and fatigue easily occur at the welded joints of the reactor structure, leading to crack initiation and weld cracking near the joints, seriously threatening the reactor's safety and reliability. Second, due to structural strength requirements, V-MBR reactors typically use more structural materials than aerated MBR reactors, resulting in a heavier reactor. This leads to greater inertial forces during reciprocating motion, accelerating reactor failure, reducing structural safety and reliability, and increasing operating energy consumption. Invention patent CN105948389B discloses a swing-type reciprocating motion MBR reactor and system. Although this type of reactor replaces the track design with a rotating shaft, overcoming the drawbacks of track wear, the reactor's center of gravity changes in real time during operation, leading to increased energy consumption; furthermore, the stress concentration and fatigue phenomena at the membrane reactor's welded joints have not been improved.

[0004] During the operation of the V-MBR process, the horizontal reciprocating motion of the membrane module is required, and another key component is the vibration drive component. Through a series of driving and connecting devices, the vibration drive component enables the entire vibrating membrane module system to reciprocate at a specific amplitude, frequency, and speed, thereby providing a fundamental guarantee for the shear force required for the membrane fibers to interact with the wastewater.

[0005] Currently, the drive components of V-MBR vibration systems mainly adopt the motor-crankshaft connecting rod technology. This technology uses a motor to drive a reducer, which in turn drives double-sided crankshaft connecting rods to achieve the reciprocating motion drive of the slide (a fixed component in the V-MBR vibration system that slides with the drive components). Through operational monitoring of some water plant vibrating membrane bioreactor systems, the following problems were found with the motor-crankshaft connecting rod drive technology: First, the structure is complex and heavy, making on-site installation and disassembly inconvenient; second, parameters such as reciprocating motion amplitude and displacement curves cannot be adjusted as needed, making it difficult to adapt to the requirements of intelligent operation; third, the machine body has poor cleanliness, and lubricating grease contaminates the membrane tank. Summary of the Invention

[0006] The purpose of this invention is to provide a lightweight vibrating membrane bioreactor system to solve at least one of the technical problems existing in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This invention provides a lightweight vibrating membrane bioreactor system, comprising:

[0009] A drive mechanism and a vibrating membrane bioreactor driven by the drive mechanism, the vibrating membrane bioreactor including a suspension beam system, the suspension beam system being connected to a water collection system via a pressure pipe system and a tie rod system, the water collection system containing membrane elements;

[0010] The drive mechanism is connected to the vibrating membrane bioreactor; the output shaft of the drive mechanism is controlled by a PLC controller to achieve different displacement curves, thereby driving the vibrating membrane bioreactor to perform linear reciprocating motion in the same direction according to different displacement curves.

[0011] The water collection system includes an upper water collection layer, which is connected to the lower water collection layer via a middle water collection pipe; the suspension beam system is connected to the upper water collection layer via a pressure pipe system.

[0012] Furthermore, the suspension beam assembly includes two parallel main suspension beams, with a secondary suspension beam connecting the two ends of the two main suspension beams, and angle steel connecting the main and secondary suspension beams.

[0013] Furthermore, the tie rod system includes multiple tie rods connecting the main beam of the lifting beam and the secondary beam of the lifting beam to the upper water collection layer.

[0014] Furthermore, four diagonal tie rods connect the main beam of the suspension beam to the main beam on the top surface of the membrane tank of the upper water collection layer.

[0015] Furthermore, a first suspension beam cross tie rod and a second suspension beam cross tie rod are connected between the secondary suspension beam and the top secondary suspension beam of the membrane tank of the upper water collection layer.

[0016] Furthermore, the upper water collection layer includes two parallel membrane tank top surface main beams, with membrane tank top surface secondary beams connected between the two ends of the two membrane tank top surface secondary beams; an upper water collection main pipe is connected between the two membrane tank top surface secondary beams, and the upper water collection main pipe is parallel to the membrane tank top surface main beams.

[0017] Furthermore, the lower water collection layer includes two parallel membrane tank bottom main beams, with a membrane tank bottom secondary beam connected between the two ends of the two membrane tank bottom main beams; a lower water collection main pipe is connected between the two membrane tank bottom secondary beams, and the lower water collection main pipe is parallel to the membrane tank bottom main beams.

[0018] Furthermore, by using a servo electric cylinder as the drive mechanism and a PLC control panel as the controller, precise control of the output shaft displacement of the servo electric cylinder can be achieved.

[0019] Furthermore, it also includes a connecting device for connecting the output shaft of the servo electric cylinder to the carriage and transmitting the driving force of the servo electric cylinder, thereby driving the carriage and the vibrating diaphragm assembly to operate.

[0020] Furthermore, it also includes a base for fixing the servo electric cylinder; an adjustment device for adjusting the spatial position of the servo electric cylinder; a heat dissipation device for rapidly dissipating heat during the operation of the servo electric cylinder to protect its stable operation; and an electronic control device for integrating the circuits, control modules, and display modules involved in the system, and providing a power source for system operation.

[0021] The beneficial effects of this invention are as follows: By using prestressed tie rods, pressure pipes, and hinged connections, the stress concentration and fatigue failure problems caused by the original welded connection method under long-term alternating loads are avoided, thus improving the structural safety and reliability of the V-MBR unit; the weight of the V-MBR unit is significantly reduced, achieving lightweight design, thereby further reducing the unit's operating energy consumption and lowering the user's overall equipment investment cost; the servo electric cylinder is an integrated device, simplifying the structure of the drive components of the vibrating membrane bioreactor system and simplifying the on-site assembly process; the displacement and period of the cylinder output shaft can be adjusted through the PLC control panel, offering advantages such as high precision and flexibility in motion displacement and period, and programmability, allowing the vibrating membrane bioreactor system to be programmed as needed for different operating conditions and operate intelligently; only the output shaft inside the servo electric cylinder needs to be lubricated through the grease port, reducing the number and frequency of grease ports compared to existing drive technologies, lowering the probability of grease contamination of the membrane tank, and ensuring on-site cleanliness; the integrated servo electric cylinder has a lower procurement cost than existing drive equipment, and the entire system occupies less space and is lighter, reducing the user's overall equipment investment cost.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the lightweight vibrating membrane bioreactor described in an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the suspension beam system structure of the lightweight vibrating membrane bioreactor according to an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the pressure tube structure according to an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the tie rod structure according to an embodiment of the present invention. Wherein, Figure 4 (a) is a structural diagram of a double-ended tie rod. Figure 4 (b) is a diagram of a single-head tie rod structure.

[0028] Figure 5 This is a schematic diagram of the water collection system structure according to an embodiment of the present invention.

[0029] Figure 6 This is a schematic diagram illustrating the application of local prestress as described in an embodiment of the present invention.

[0030] Figure 7 This is a three-dimensional structural diagram of the lightweight vibrating membrane bioreactor described in an embodiment of the present invention.

[0031] Figure 8 This is a structural diagram of the drive system for the lightweight vibrating membrane bioreactor described in an embodiment of the present invention.

[0032] Figure 9 This is a schematic diagram of the parameter adjustment of the drive system of the lightweight vibrating membrane bioreactor described in an embodiment of the present invention.

[0033] Figure 10 This is a schematic diagram of the operating position of the drive system of the lightweight vibrating membrane bioreactor described in an embodiment of the present invention.

[0034] Figure 11 This is a schematic diagram of the parameter adjustment of the drive system of the lightweight vibrating membrane bioreactor described in an embodiment of the present invention.

[0035] Figure 12 This is a schematic diagram of the operating position of the drive system of the lightweight vibrating membrane bioreactor described in an embodiment of the present invention.

[0036] Figure 13 This is an overall structural diagram of the prestressed tie rod structure vibration diaphragm module described in this invention.

[0037] Figure 14 This is a schematic diagram of the membrane box structure system according to an embodiment of the present invention.

[0038] Figure 15 This is a schematic diagram of the installation and assembly of the membrane box bottom base according to an embodiment of the present invention.

[0039] Figure 16 This is a schematic diagram of the assembly of the membrane box bottom frame according to an embodiment of the present invention.

[0040] Figure 17 This is a schematic diagram of the lower water collection pipe assembly according to an embodiment of the present invention.

[0041] Figure 18 This is a schematic diagram of the assembly of the mid-node plate of the main beam at the bottom of the membrane box according to an embodiment of the present invention.

[0042] Figure 19 This is a schematic diagram of the assembly of the membrane box bottom pressure tube tie rod according to an embodiment of the present invention.

[0043] Figure 20 This is a schematic diagram of the top layer of the membrane box according to an embodiment of the present invention.

[0044] Figure 21 This is a schematic diagram of the upper water collection assembly assembly according to an embodiment of the present invention.

[0045] Figure 22 This is a schematic diagram of the membrane box bottom pressure tube assembly according to an embodiment of the present invention.

[0046] Figure 23 This is a schematic diagram of the assembly of the membrane box top module and the membrane box bottom module according to an embodiment of the present invention.

[0047] Figure 24 This is a schematic diagram of the membrane box pull rod assembly according to an embodiment of the present invention.

[0048] Figure 25 This is a schematic diagram of the assembly of the suspended beam structure system according to an embodiment of the present invention.

[0049] Figure 26 This is a schematic diagram of the independent packaging of the suspension beam sub-beam frame module according to an embodiment of the present invention.

[0050] The components are as follows: 1-Suspended beam assembly; 2-Pressure pipe assembly; 3-Tie rod assembly; 4-Water collection assembly; 5-Membrane element; 6-Pin shaft connector; 7-Middle node plate of the main beam on the top surface of the membrane box; 8-Hanger; 9-Main beam on the top surface of the membrane box; 10-Angle steel of the main and auxiliary beams on the top surface of the membrane box; 11-Upper water collection assembly; 12-Diagonal tie rod on the top surface of the membrane box; 13-Ear plates on both sides of the membrane box; 14-Secondary beam on the top surface of the membrane box; 15-Node plate on the top surface of the membrane box; 16-Bending plate of the hanger; 17-Vertical tie rod of the membrane box; 18-Vertical pressure pipe of the membrane box; 19-Cross tie rod of the first membrane box; 20-Diagonal tie rod on the middle surface of the membrane box; 21-Basket connector; 22-Cross tie rod of the second membrane box; 23-Middle water collection pipe; 24-Washer with bolt holes; 25-Angle steel of the main and auxiliary beams on the bottom surface of the membrane box; 26-Lower water collection assembly. Water assembly; 27-Membrane box bottom sub-beam; 28-Membrane box bottom node plate; 29-Anchor rubber; 30-Membrane box bottom main beam; 31-Membrane box bottom main beam middle node plate; 32-Membrane box bottom pressure pipe; 33-Inclined pressure block; 34-Suspension beam main beam; 35-Suspension beam main and auxiliary beam angle steel; 36-First suspension beam cross tie rod; 37-Suspension beam auxiliary beam; 38-Suspension beam vertical tie rod; 39-Suspension beam vertical pressure pipe; 40-Second suspension beam cross tie rod; 41-Integrated node plate; 42-Suspension beam inclined tie rod; 43-Slide carriage; 44-Connecting device; 45-Servo electric cylinder; 46-Base; 47-Adjustment device; 48-Heating device; 49-Electrical control device; 50-PLC control panel; 51-Suspension beam main and auxiliary beam angle steel; 52-Membrane box top pressure pipe. Detailed Implementation

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0052] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0053] It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as described here.

[0054] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, and / or groups thereof.

[0055] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0056] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] In the description of this specification, the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this technology and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this technology.

[0058] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of these terms in this art according to the specific circumstances.

[0059] To facilitate understanding of the present invention, the present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments. However, the specific embodiments do not constitute a limitation on the embodiments of the present invention.

[0060] Those skilled in the art should understand that the accompanying drawings are merely schematic diagrams of embodiments, and the components in the drawings are not necessarily essential for implementing the present invention.

[0061] like Figures 1 to 26 This invention provides a lightweight vibrating membrane bioreactor system, including a drive mechanism and a vibrating membrane bioreactor driven by the drive mechanism. The vibrating membrane bioreactor includes a suspension beam assembly 1, which is connected to a water collection assembly 4 via a pressure pipe assembly 2 and a tie rod assembly 3. The water collection assembly 4 contains a membrane element 5. The drive mechanism is connected to the vibrating membrane bioreactor. A PLC controller controls the output shaft of the drive mechanism to achieve different displacement curves, driving the vibrating membrane bioreactor to perform linear reciprocating motion in the same direction according to different displacement curves. The water collection assembly 4 includes an upper water collection layer, which is connected to a lower water collection layer via a middle water collection pipe 23. The suspension beam assembly 1 is connected to the upper water collection layer via the pressure pipe assembly 2.

[0062] The suspension beam assembly 1 includes two parallel main suspension beams 34, with a secondary suspension beam 37 connecting the two ends of the main suspension beams 34. Angle steel 51 connects the main and secondary suspension beams 34 and 37. The tie rod assembly 3 includes multiple tie rods connecting the main and secondary suspension beams 34 and the upper water collection layer. Two diagonal tie rods 42 connect the main suspension beams 34 and the main beam 9 on the top surface of the membrane tank of the upper water collection layer. A first cross tie rod 36 and a second cross tie rod 40 connect the secondary suspension beams 37 and the secondary beam 14 on the top surface of the membrane tank of the upper water collection layer.

[0063] The upper water collection layer includes two parallel membrane tank top surface main beams 9, and membrane tank top surface secondary beams 14 are connected between the two ends of the two membrane tank top surface main beams 9; an upper water collection main pipe 11 is connected between the two membrane tank top surface secondary beams 14, and the upper water collection main pipe 11 is parallel to the membrane tank top surface main beams 9.

[0064] The lower water collection layer includes two parallel membrane tank bottom main beams 30, and membrane tank bottom secondary beams 27 are connected between the two ends of the two membrane tank bottom main beams 30; a lower water collection main pipe 26 is connected between the two membrane tank bottom secondary beams 27, and the lower water collection main pipe 26 is parallel to the membrane tank bottom main beams 30.

[0065] A servo electric cylinder 45 is used as the drive mechanism, and a PLC control panel 50 is used as the controller for programming, enabling precise control of the output shaft displacement of the servo electric cylinder 45. A connecting device 44 is also included to connect the output shaft of the servo electric cylinder 45 to the slide 43 that drives the vibrating membrane bioreactor, and to transmit the driving force of the servo electric cylinder 45. For example, the connecting device 44 is a connecting flange, which is a standard part, national standard number GB / T 9124.1-2019, flat (FF) plate type flat welded steel pipe flange, model DN32, 1MPa. The front flange of the servo electric cylinder 45 is connected to the connecting flange 44 welded to the front end of the slide 43. The main beam 34 of the vibrating membrane assembly is placed on the slide and fixed. The servo electric cylinder 45 drives the slide through the connecting flange 44, thereby causing the assembly fixed on the slide 43 to move accordingly.

[0066] It also includes a base 46 for fixing the servo electric cylinder 45; and an adjustment device 47 for adjusting the spatial position of the servo electric cylinder 45. The adjustment device 47 can be a leveling pad, CDT series insert-type leveling pad, model CDTⅢ.

[0067] It also includes a heat dissipation device 48 for rapid heat dissipation during the operation of the servo electric cylinder, protecting the servo electric cylinder for stable operation; and an electronic control device 49 for integrating the circuits, control modules, and display modules involved in the system, and providing power for system operation. The heat dissipation device 48 can be a water-cooled radiator of model XHX1126 manufactured by Chengdu Xihe Radiator Factory.

[0068] Reference Figure 1 In one specific embodiment, a lightweight vibrating membrane bioreactor assembly including 64 membrane elements is provided, comprising a suspension beam assembly 1, a pressure pipe assembly 2, a tie rod assembly 3, a water collection assembly 4, membrane elements 5, and a pin connector 6. In this embodiment, 64 membrane elements are assembled, and the corresponding assembly dimensions can be 4000×2050×4000mm.

[0069] Installation sequence of the assembly frame: First, place the water collection system 4 on a flat ground; place the four pressure pipes of corresponding length from the pressure pipe assembly 2 at the corresponding positions of the four corners of the water collection system 4, and hinge them together using the pin connector 6 to fix the upper and lower water collection layers in the water collection system 4; install and fix the lifting beam assembly 1 above the water collection system 4 using the four pressure pipes of corresponding length from the pressure pipe assembly 2; install the double-headed tie rods (such as...) from the tie rod assembly 3... Figure 4 a) or a single-ended lever (such as...) Figure 4 b), see reference Figure 1 Place it in the corresponding position and fix it by hinge with pin connector 6.

[0070] Application of prestress in the assembly: Reference Figure 6 Rotate each tie rod in tie rod assembly 3 in direction A as shown in the diagram. Because the pressure tube in pressure tube assembly 2 is of fixed length and both ends of the tie rod have positive and negative threads, the tie rod itself will be subjected to a tensile force in direction B as shown in the diagram, while the pressure tube will also bear a certain pressure. Similarly, pre-tighten each tie rod in this manner so that each tie rod bears the same tensile force and each pressure tube bears the corresponding pressure, thereby balancing the forces on the entire assembly and maintaining stability.

[0071] Finally, the 64 membrane elements 5 were installed in the water collection system 4, and a lightweight vibrating membrane bioreactor assembly with 64 membrane elements was successfully produced.

[0072] Reference Figure 7 In another specific embodiment, a lightweight vibrating membrane bioreactor assembly including 40 membrane elements is provided, including a hanging beam assembly 1, a pressure pipe assembly 2, a tie rod assembly 3, a water collection assembly 4, membrane elements 5, and a pin shaft connector 6. In this embodiment, 40 membrane elements are installed, and the corresponding assembly dimensions can be 2750×2050×4050mm.

[0073] Installation sequence of the assembly frame: First, place the water collection system 4 on a flat ground; place the four pressure pipes of corresponding length from the pressure pipe assembly 2 at the corresponding positions of the four corners of the water collection system 4, and hinge them together using the pin connector 6 to fix the upper and lower water collection layers in the water collection system 4; install and fix the lifting beam assembly 1 above the water collection system 4 using the four pressure pipes of corresponding length from the pressure pipe assembly 2; install the double-headed tie rods (such as...) from the tie rod assembly 3... Figure 4 a) or a single-ended lever (such as...) Figure 4 b), see reference Figure 7 Place it in the corresponding position and fix it by hinge with pin connector 6.

[0074] Application of prestress in the assembly: Reference Figure 6Rotate each tie rod in tie rod assembly 3 in direction A as shown in the diagram. Because the pressure tube in pressure tube assembly 2 is of fixed length and both ends of the tie rod have positive and negative threads, the tie rod itself will be subjected to a tensile force in direction B as shown in the diagram, while the pressure tube will also bear a certain pressure. Similarly, pre-tighten each tie rod in this manner so that each tie rod bears the same tensile force and each pressure tube bears the corresponding pressure, thereby balancing the forces on the entire assembly and maintaining stability.

[0075] Finally, 40 membrane elements 5 were installed in the water collection system 4, and a lightweight vibrating membrane bioreactor assembly with 40 membrane elements was successfully produced.

[0076] Reference Figure 8 In one specific embodiment, a drive mechanism for a vibratory membrane bioreactor system with programmable displacement curves is provided, including a connecting device 44 connected to a slide 43, and also including a servo electric cylinder 45, a base 46, an adjustment device 47, a heat dissipation device 48, an electrical control device 49, and a PLC control panel 50.

[0077] Assembly sequence: First, weld and fix the adjusting device 47 to the pre-embedded plate on the ground at the project site; place the base 46 on the adjusting device 47; place the servo electric cylinder 45 on the base 46 and fix it by bolts; install and fix the connecting device 44 on the slide 43; adjust the adjusting device 47 until the servo electric cylinder 45 is aligned with the connecting device 44 and connected by bolts, then fix the position of the adjusting device 47; install the heat dissipation device 48 on the servo electric cylinder 45; place the PLC control panel 50 inside the electrical control device 49; connect the electrical control device 49 and the servo electric cylinder 45, and after debugging the circuit connection to ensure it is correct, the system assembly is complete.

[0078] Reference Figure 9 The parameter adjustment diagram in this embodiment shows that the displacement parameter in the PLC control panel 50 is adjusted to 50mm and the cycle parameter to 2s using the + and - buttons. When the servo electric cylinder 45 is started using the electrical control device 49, the output shaft of the servo electric cylinder 45 drives the slide 43 to move in a 2s cycle with a displacement of ±50mm via the connecting device 44. The equipment operating position is shown in the diagram. Figure 10 As shown.

[0079] Reference Figure 11 In another specific embodiment, a schematic diagram of the control parameter adjustment for the drive mechanism of the programmable displacement curve vibratory membrane bioreactor system is shown. The displacement parameter in the PLC control panel 50 is adjusted to 80mm and the cycle parameter to 4s using the + and - buttons. When the servo electric cylinder 45 is started using the electronic control device 49, the output shaft of the servo electric cylinder 45 drives the slide 43 to operate in a 4s cycle with a displacement of ±80mm. The device's operating position is shown in the diagram. Figure 12 As shown.

[0080] like Figures 13 to 26 As shown, in view of the problems and defects of traditional welded diaphragm device structures, in a specific embodiment, a solution is proposed to address the following issues: Figure 13 The assembly and pre-tightening method for a lightweight vibrating membrane bioreactor structure with prestressed tie rods and prestressed compression rods, as shown, guides assemblers to complete assembly quickly and accurately. This assembly method requires low skill levels from installers and can be completed using portable tools, resulting in low assembly costs and rapid, efficient installation. Furthermore, in terms of material selection and structural form, the overall structure uses a semi-open channel steel structure and tie rods / compression tubes instead of a closed rectangular steel structure, significantly reducing overall structural weight, lowering material costs, and improving economic efficiency. Regarding connection methods, the overall structure adopts a hinged pin connection method instead of traditional welding, avoiding safety hazards caused by poor welding quality. From a mechanical perspective, the hinged connection method is more flexible and better suited for dynamic structural load-bearing. In addition, the prestressed assembly measures for the tie rods and compression tubes increase the original structural stiffness and strength, further enhancing the overall structural safety and stability. Therefore, this novel assembly structure has broader development potential.

[0081] The assembly structure consists of channel steel of different specifications, ear plates, tie rods, and pressure pipe fittings connected by bolts. Each component is simple in structure and easy to operate, generally requiring only 1-2 ordinary workers to assemble. Based on the overall assembly, the structure is divided into two main parts: the lifting beam structure system and the membrane box structure system. The lifting beam structure system is further subdivided into four modules: the main lifting beam module, the secondary lifting beam module, the lifting beam tie rod module, and the lifting beam pressure pipe module. The membrane box structure system is further subdivided into five modules: the membrane box top module, the membrane box bottom module, the central water collection pipe module, the membrane box tie rod module, and the membrane box pressure pipe module. During assembly and pre-tightening, a grouped, modular assembly method is used, proceeding from bottom to top and from inside to outside. That is, during installation, the components within each module are assembled and pre-tightened first, then the modules within the same level are assembled and pre-tightened, and finally, the entire system within the same level is assembled and pre-tightened.

[0082] Specific examples Figure 14 As shown, the specific components of the membrane box structure of this device are as follows:

[0083] According to the installation sequence, the assembly and pre-tightening methods of the membrane box structure system will be introduced first.

[0084] The membrane tank structure mainly consists of five modules: the membrane tank bottom module, the membrane tank top module, the central water collection pipe module, the membrane tank tie rod module, and the membrane tank pressure pipe module. Among them, the membrane tank bottom module and the membrane tank top module are each encapsulated as independent modules by channel steel, connecting lugs, tie rods, and pressure pipes, respectively. The remaining modules are combination modules of dispersed parts.

[0085] The following sections describe the assembly, installation, and pre-tightening methods for the components within each module. This includes assembly within and between modules.

[0086] Assembly and pre-tightening of parts within each module of the membrane box structure system

[0087] Assembly and pre-tightening method for membrane box bottom module:

[0088] Step 1: Install the membrane box base. The main and auxiliary beam angle steel 25 on the bottom of the membrane box is connected to the anchor rubber 29 using hexagon socket head cap screws. Assembly diagram as shown below. Figure 15 As shown.

[0089] Step Two: Install the membrane box bottom frame. The main beam 30, secondary beam 27, and node plate 28 of the membrane box bottom are connected to the angle steel 25 of the main and secondary beams of the membrane box bottom by hexagonal bolts, forming the bottom layer of the membrane box. Figure 16 As shown.

[0090] Step 3: Assembly of the lower water collection pipe assembly. The lower water collection assembly 26 is welded according to the machining drawing. However, the component—the angle steel of the water collection pipe on the bottom sub-beam of the membrane box—should first be connected to the corresponding hole of the membrane box bottom sub-beam assembled in Step 2. Then, place the lower water collection pipe in it, adjust and determine the appropriate position, and spot weld the angle steel of the water collection pipe on the bottom sub-beam of the membrane box to the lower water collection pipe. Then, remove it and perform a full weld, and finally reinstall it at the bottom of the membrane box. Assembly diagram as shown below. Figure 17 As shown.

[0091] Step 4: Assemble the mid-section node plate 31 of the main beam at the bottom of the membrane box. The mid-section node plate 31 of the main beam at the bottom of the membrane box is installed on the bottom layer of the membrane box. Secure it with bolts. Assembly diagram as shown below. Figure 18 As shown.

[0092] Step 5: Assemble the membrane box bottom pressure pipe and tie rod. Install the membrane box top pressure pipe 32 at the bottom of the membrane box, insert the inclined pressure block 33, tighten it, and then spot weld the inclined pressure block to the middle node plate of the lower water collection pipe. Install the membrane box top inclined tie rod 12 at the bottom of the membrane box and tighten it. Assembly diagram as shown below. Figure 19 As shown.

[0093] Step Six: Adjust and Pre-tighten the Membrane Tank Bottom Module. After completing the above steps, adjust and check the membrane tank bottom module assembly, ensuring that the main beam, sub-beam, and water collection pipe surfaces close to the membrane tank are on the same plane. Then, pre-tighten all bolts to a torque of 400–450 Nm.

[0094] Assembly and pre-tightening method for the top module of the membrane box:

[0095] Step 1: Preparation of the installation platform. Place two identical profiles (such as channel steel) on a flat surface as a base to facilitate the installation of the top layer of the membrane box.

[0096] Step Two: Install the membrane box top frame. First, the main beam 9, the angle steel 10 of the main and secondary beams of the membrane box top, the secondary beam 14, the node plate 15, and the hanging bracket bending plate 16 of the membrane box top are connected with hexagonal bolts to form the top layer of the membrane box. Then, the node plate 7 in the middle of the main beam of the membrane box top and the ear plates 13 on both sides of the membrane box are installed on the top layer of the membrane box with hexagonal bolts, as shown. Figure 20 As shown.

[0097] Step 3: Install the upper water collection assembly. Assemble the 11 upper water collection assemblies as shown in the machining drawing. However, one component—the angle steel for the water collection pipe on the top sub-beam of the membrane tank—should first be connected to the corresponding holes of the membrane tank top sub-beam assembled in Step 2 of the membrane tank top module installation. Then, place the upper water collection assembly within it, adjust and confirm the appropriate position, and spot weld the angle steel for the water collection pipe on the top sub-beam of the membrane tank to the upper water collection assembly. Then, remove it and perform a full weld, finally reinstalling it on the top layer of the membrane tank. Assembly diagram as shown below. Figure 21 As shown.

[0098] Step 4: Install the membrane tank top pressure pipe 52 and tie rod. The membrane tank top pressure pipe 52 is installed on the top layer of the membrane tank, and the inclined pressure block 33 is inserted and tightened. After tightening, the inclined pressure block 33 is spot-welded to the middle node plate of the upper water collection assembly (middle node plate 7 of the main beam on the top surface of the membrane tank). The membrane tank top inclined tie rod 12 is installed on the top layer of the membrane tank and tightened. The assembly diagram is shown below. Figure 22 As shown.

[0099] Step 5: Hanger Installation. Hanger 8 is connected to the top frame structure of the membrane box using hexagonal bolts.

[0100] Step Six: Adjust and Pre-tighten the Membrane Box Top Module. After completing the above steps, adjust and check the membrane box top module assembly, ensuring that the surfaces of the main beam 9, the secondary beam 14, and the upper water collection assembly 11 (upper water collection pipe) close to the membrane box are on the same plane. Then, pre-tighten all bolts to a torque of 400–450 Nm.

[0101] Membrane box X tie rod assembly module assembly and pre-tightening method:

[0102] Step 1: The first membrane box cross tie rod 19 is connected with a left-handed and a right-handed one through the flower basket connector 21. At the same time, the second membrane box cross tie rod 22 passes through the flower basket connector 21 to form an X-shaped tie rod assembly module.

[0103] The assembly of all modules within the membrane box system was completed through the installation of the membrane box bottom module, membrane box top module, and X-shaped tie rod assembly module. Next, the above modules will be assembled with other dispersed parts within the membrane box.

[0104] II. Assembly and pre-tightening of modules within the membrane box structure system

[0105] This process is carried out after the installation of components within the modules of the membrane box structure assembly is completed. The assembly and pre-tightening of the modules within the membrane box structure assembly is the final assembly process of the membrane box structure. Installation and pre-tightening are performed separately in this process; installation precedes pre-tightening. That is, the modules are first connected, and finally, the pre-tightening operation is completed based on on-site observation and adjustments. The specific steps are as follows:

[0106] Step 1: Installation of the outer frame of the membrane box. Install and pre-fix the bottom module, top module, and pressure pipe module of the membrane box; first, lay the bottom module and top module of the membrane box on their flat surfaces, and then connect and pre-fix the vertical pressure pipe 18 of the membrane box to the top node plate 15 and the bottom node plate 28 of the membrane box respectively through pins.

[0107] Step Two: Install the central water manifold module. The flanges at both ends of the central water manifold 23 are connected and pre-fixed to the water manifold flanges in the top and bottom modules of the membrane box using bolts and gaskets 24 with bolt holes. During this process, it is essential to ensure that the bottom and top frames of the membrane box are parallel. Figure 23 As shown.

[0108] Step 3: Install the membrane box tie rod module. The vertical tie rod 17 and the X-shaped tie rod assembly of the membrane box are connected and pre-fixed to the top node plate 15 and the bottom node plate 28 of the membrane box respectively via pins. The diagonal tie rod 20 in the middle of the membrane box is connected and pre-fixed to the middle ear plates 13 on both sides of the membrane box and the middle ear plate of the lower water collection pipe via pins. First install the vertical tie rod 17, then install the X-shaped tie rod assembly, and finally install the diagonal tie rod 20 in the middle of the membrane box. Figure 24 As shown.

[0109] Step 4: Complete the adjustment and pre-tightening of the membrane box structure assembly. Check and adjust the inner spacing between the top and bottom surfaces of the membrane box to ensure that the two planes are parallel and conform to the installation distance of the membrane. Then, pre-tighten the mounting pins of the tie rods and pressure tubes to ensure that the tie rods and pressure tubes are not loose.

[0110] This process completes the assembly and pre-tightening of the membrane box structure system. Next, we will introduce the installation of the suspension beam structure system.

[0111] Unlike membrane box structures, suspended beam structures have fewer components, making installation relatively simple and convenient. Similarly, based on structural modules, the suspended beam structure system comprises four main modules: the main beam module, the secondary beam module, the tie rod module, and the pressure pipe module. The secondary beam module is an independently encapsulated module consisting of channel steel, connecting lugs, and tie rods, while the other modules are combinations of disparate parts. Therefore, the installation sequence for the suspended beam structure system is: 1. Independent encapsulation within the secondary beam frame module; 2. Installation of the main beam module; 3. Installation of the tie rod module.

[0112] 1. Independently packaged within the suspension beam sub-beam frame module

[0113] ① The secondary beam 37 of the suspension beam is bolted to the angle steel 35 of the main and secondary beams of the suspension beam; ② The vertical pressure pipe 39 of the suspension beam is connected to the angle steel 35 of the main and secondary beams of the suspension beam and the integrated node plate 41 with pins respectively; ③ The vertical tie rod 38 of the suspension beam is connected to the angle steel 35 of the main and secondary beams of the suspension beam and the integrated node plate 41 with pins respectively; ④ X-shaped tie rod installation: the first suspension beam cross tie rod 40 is connected by one left-handed and one right-handed through the turnbuckle connector 21, and the second suspension beam cross tie rod 36 passes through the turnbuckle connector 21 to form an X-shaped suspension beam tie rod system. This X-shaped suspension beam tie rod system is connected to the angle steel 35 of the main and secondary beams of the suspension beam and the integrated node plate 41 with pins respectively. ⑤ Adjust the independent encapsulation module of the secondary beam of the suspension beam to keep the shaft hole distance between the vertical tie rod and the vertical pressure pipe equal in length and the axis parallel, and the diagonal of the cross diagonal tie rod of the suspension beam in the frame plane is equal in length or the length error is not greater than 3mm. After adjustment, pre-tighten all bolts and pins.

[0114] Installation of main beam module for suspended beam

[0115] Place the main beam 34 of the lifting beam flat on a horizontal surface, ensuring that the open side of the channel steel is perpendicular to the horizontal plane and faces outward. Invert the independent encapsulation module frame of the secondary beam 37 of the lifting beam so that the shaft hole of the connecting ear plate is aligned with the shaft hole of the main beam of the lifting beam. Then place it and connect and tighten it with bolts, spring washers, and flat washers.

[0116] Installation of tie rod module for suspension beam

[0117] With the main beam and auxiliary beam of the suspension beam installed and inverted, the diagonal tie rod 42 of the suspension beam is connected and pre-fixed to the angle steel 35 of the main and auxiliary beams of the suspension beam with bolts.

[0118] Finally, the overall assembly and pre-tightening method of this novel assembly structure is introduced.

[0119] ① Lay the already installed hanging beam structure system and membrane box structure system along the long side of the frame respectively; ② Final assembly: Connect and pre-fix the integrated node plate 41 with the membrane box top main and secondary beam angle steel 10 of the membrane box top module with bolts to complete the initial docking connection of the two major systems. ③ Pre-tightening: Pre-tighten the tie rods and pressure pipes of the hanging beam structure system to generate prestress, thereby increasing the structural stiffness and strength. The pre-tightening sequence of the tie rods and pressure pipes of the hanging beam structure system is: hanging beam vertical pressure pipe 18 - hanging beam vertical tie rod 17 - hanging beam cross tie rod - hanging beam diagonal tie rod. The pre-tightening force should be controlled within 400-450N. At the same time, the tie rods and pressure pipes in the same plane are pre-tightened alternately to make the stress on each pipe component more uniform.

[0120] In summary, this method guides assembly personnel to quickly and accurately complete the assembly of prestressed tie rods and prestressed compression rods. During assembly and prestressing, a modular assembly approach is adopted, proceeding from bottom to top and from the inside out. Specifically, during installation, the components within each module are assembled and prestressed first, then the modules within the same level are assembled and prestressed, and finally, the entire assembly and prestressing is completed between the same level of systems. This assembly method requires relatively low skill levels from installers and can be completed using portable tools, resulting in low assembly costs and rapid, efficient installation. Furthermore, in terms of material selection and structural form, the overall structure uses a semi-open channel steel structure and tie rods / compression pipes instead of a closed rectangular steel structure, significantly reducing overall structural weight, lowering material costs, and improving economic efficiency. Regarding connection methods, the overall structure uses a hinged pin connection instead of traditional welding, avoiding safety hazards caused by poor welding quality.

[0121] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that, based on the technical solutions disclosed in the present invention, various modifications or variations that can be made by those skilled in the art without creative effort should be included within the scope of protection of the present invention.

Claims

1. A lightweight vibrating membrane bioreactor system, comprising a drive mechanism and a vibrating membrane bioreactor driven by the drive mechanism, characterized in that: The vibrating membrane bioreactor includes a beam assembly (1), which is connected to a water collection assembly (4) via a pressure tube assembly (2) and a tie rod assembly (3) in a hinged manner. The water collection assembly (4) contains a membrane element (5). The drive mechanism is connected to the vibrating membrane bioreactor; the output shaft of the drive mechanism is controlled by a PLC controller to achieve different displacement curves, thereby driving the vibrating membrane bioreactor to perform linear reciprocating motion in the same direction according to different displacement curves. The water collection system (4) includes an upper water collection layer, which is connected to the lower water collection layer through a middle water collection pipe (23); the suspension beam system (1) is connected to the upper water collection layer through a pressure pipe system (2) and a tie rod system (3); the suspension beam system (1) includes two parallel main suspension beams (34), with a secondary suspension beam (37) connected between the two ends of the two main suspension beams (34), and a main and secondary suspension beam angle steel connecting the main suspension beams (34) and the secondary suspension beams (37). 51); The tie rod system (3) includes multiple tie rods connecting the main beam (34) and the secondary beam (37) of the hanging beam to the upper water collection layer; four diagonal tie rods (42) are connected between the main beam (34) of the hanging beam and the main beam (9) of the membrane box top surface of the upper water collection layer; a first hanging beam cross tie rod (36) and a second hanging beam cross tie rod (40) are connected between the secondary beam (37) of the hanging beam and the secondary beam (14) of the membrane box top surface of the upper water collection layer. Among them, the four pressure pipes of corresponding length in the pressure pipe assembly (2) are placed at the corresponding positions of the four corners of the water collection assembly (4) and hinged by the pin connector (6) to fix the upper water collection layer and the lower water collection layer in the water collection assembly (4); the lifting beam assembly (1) is installed and fixed above the water collection assembly (4) by the four pressure pipes of corresponding length in the pressure pipe assembly (2); the tie rod in the tie rod assembly (3) is placed at the corresponding position and hinged and fixed by the pin connector (6); A servo electric cylinder (45) is used as the driving mechanism, and a PLC control panel (50) is used as the controller to program and realize the precise control of the motion displacement of the output shaft of the servo electric cylinder (45); it also includes a connecting device (44) for connecting the output shaft of the servo electric cylinder (45) to the vibrating membrane bioreactor (43) and transmitting the driving force of the servo electric cylinder (45).

2. The lightweight vibrating membrane bioreactor system according to claim 1, characterized in that, The upper water collection layer includes two parallel membrane box top surface main beams (9), and membrane box top surface sub-beams (14) are connected between the two ends of the two membrane box top surface main beams (9); an upper water collection main pipe (11) is connected between the two membrane box top surface sub-beams (14), and the upper water collection main pipe (11) is parallel to the membrane box top surface main beams (9).

3. The lightweight vibrating membrane bioreactor system according to claim 2, characterized in that, The lower water collection layer includes two parallel membrane tank bottom main beams (30), and membrane tank bottom sub-beams (27) are connected between the two ends of the two membrane tank bottom main beams (30); a lower water collection main pipe (26) is connected between the two membrane tank bottom sub-beams (27), and the lower water collection main pipe (26) is parallel to the membrane tank bottom main beams (30).

4. The lightweight vibrating membrane bioreactor system according to claim 1, characterized in that, It also includes a base (46) for fixing the servo electric cylinder (45); it also includes an adjustment device (47) for adjusting the spatial position of the servo electric cylinder (45); it also includes a heat dissipation device (48) for quickly dissipating heat during the operation of the servo electric cylinder and protecting the stable operation of the servo electric cylinder; it also includes an electronic control device (49) for integrating the circuits, control modules and display modules involved in the system and providing a power source for the operation of the system.

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