Integrated wastewater treatment apparatus and method

Abstract

This invention relates to the field of wastewater treatment technology, and more particularly to an integrated wastewater treatment device and method, comprising: an MBR membrane module, a top plate, support rods, a bottom plate, and a pulse unit. Several MBR membrane modules are arranged in a circular array and installed between the top plate and the bottom plate. Several support rods are evenly arranged and vertically fixed to the top of the bottom plate. The bottom end of the top plate is connected to the top ends of the support rods via a lifting support unit that can extend and retract with the rise and fall of the top plate. The top plate is a hollow, sealed cavity structure, with several first aeration holes densely distributed on its bottom surface, communicating with the inner cavity of the top plate. The inner cavity of the top plate is connected to the output end of the pulse unit. The pulse unit periodically supplies first pulse gas to the inner cavity of the top plate, causing the top plate to periodically rise or fall, thereby driving the several MBR membrane modules to periodically deform. This invention provides a wastewater treatment device and method that can increase the efficiency of MBR membrane modules and save aeration volume.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to an integrated wastewater treatment device and method. Background Technology

[0002] Integrated wastewater treatment equipment is a novel water treatment technology that organically combines membrane separation technology and biological treatment technology. The membrane separation unit is used to intercept activated sludge and high-molecular-weight organic matter in the biochemical reaction tank, replacing traditional gravity sedimentation solid-liquid separation devices, improving solid-liquid separation efficiency, and is widely used in the treatment of urban and rural domestic sewage. The continuous aeration device in the MBR wastewater treatment process introduces oxygen into the water to maintain the oxygen needed for microbial film growth and pollutant degradation. Simultaneously, the rising bubbles agitate the water, washing away pollutants from the surface of the biological packing material, promoting biofilm renewal. However, the following problems exist: 1. Biofilm growth, aging, shedding, and renewal are relatively slow processes and do not require constant washing of the membrane. 2. The effect of rising bubbles on the membrane is not significant, especially in the upper and middle parts of the membrane where the agitation effect is weak, thus reducing the pollutant removal efficiency on the membrane surface. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated wastewater treatment device and method to solve the technical problems existing in the background art.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: An integrated wastewater treatment device includes: an MBR membrane module, a top plate, support rods, a bottom plate, a lifting support unit, and a pulse unit. Several MBR membrane modules are arranged in a circular array and installed between the top plate and the bottom plate. Several support rods are evenly distributed and vertically fixed to the top of the bottom plate. The bottom of the top plate is connected to the tops of the support rods via a lifting support unit that extends and retracts with the rise and fall of the top plate. The top plate is a hollow, sealed cavity structure. The bottom surface of the top plate is densely covered with several first aeration holes communicating with the inner cavity of the top plate. The inner cavity of the top plate is connected to the output end of the pulse unit. The pulse unit periodically supplies first pulse gas to the inner cavity of the top plate, causing the top plate to periodically rise or fall, thereby driving the several MBR membrane modules to periodically deform.

[0005] Furthermore, the bottom end of the top plate and the top end of the bottom plate are respectively provided with a number of mounting bodies arranged in a circular array. The number of mounting bodies in the upper part corresponds one-to-one with the number of mounting bodies in the lower part. The upper and lower ends of the number of MBR membrane modules are respectively mounted on the number of mounting bodies in the upper part and the number of mounting bodies in the lower part. When the first pulse gas is not introduced into the top plate, the distance between the bottom end face of the top plate and the top end face of the bottom plate is less than the length of the MBR membrane module in the straightened state.

[0006] Furthermore, both the top plate and the bottom plate have circular cross-sections, and the cross-sectional dimensions of the top plate are equal to those of the bottom plate; a number of support rods are arranged in a circumferential array, and the circle formed by connecting the axes of the support rods on the same horizontal plane is coaxial with the top plate and the bottom plate, and is located on 1 / 2 to 3 / 4 of the radius of the cross-sectional circle of the bottom plate.

[0007] Furthermore, the lifting support unit includes: a lifting sleeve, positioning shafts, springs, and sealing plates. Several positioning shafts, springs, and sealing plates are provided, each corresponding to one of several support rods. Several sealing plates are fixedly connected to the top ends of several support rods. Several positioning shafts are vertically fixedly connected to the top ends of several sealing plates. Several positioning shafts are coaxially arranged with several support rods. Several springs are sleeved on several positioning shafts, with both ends of the springs pressing against the bottom end of the lifting sleeve and the top end of the corresponding sealing plate. The lifting sleeve includes: a body and an annular groove. The body is circular and coaxially fixedly connected to the bottom surface of the top plate. The bottom end of the body has an annular groove coaxial with it. The upper parts of several positioning shafts are vertically slidably connected within the annular groove.

[0008] Furthermore, when the first pulse gas is continuously introduced into the top plate, the upper part of the positioning shaft remains within the annular groove.

[0009] Furthermore, the bottom surface of the top plate is a convex spherical surface, and a number of first aeration holes are densely distributed on the bottom surface of the top plate except for the mounting parts thereon. The axes of the number of first aeration holes all intersect at the center of the spherical surface.

[0010] Furthermore, the base plate is a hollow, sealed cavity structure, and the top surface of the base plate is a convex spherical surface. In addition to the mounting parts on it, the top surface of the base plate is densely covered with a number of second aeration holes, and the axes of the number of second aeration holes all intersect at the center of the spherical surface. The inner cavity of the base plate is connected to the output end of the pulse unit, and the pulse unit periodically supplies second pulse gas to the inner cavity of the base plate.

[0011] Furthermore, the support rod is a circular tube structure, the lower end of the support rod is connected to the inner cavity of the bottom plate, and the top end of the support rod is sealed by a corresponding sealing plate; the tube wall of the support rod is densely covered with a number of third aeration holes in the circumferential direction.

[0012] Furthermore, it also includes: a control unit, wherein the top of the top plate is connected to one end of the first air inlet pipe, and the side wall of the bottom plate is connected to one end of the second air inlet pipe; the pulse unit includes: a storage tank, a first air outlet pipe, a first pulse valve, a second air outlet pipe, and a second pulse valve, wherein one end of the first air outlet pipe and the second air outlet pipe are connected in parallel to the inner cavity of the storage tank, the first pulse valve is disposed on the first air outlet pipe, the second pulse valve is disposed on the second air outlet pipe, the other end of the first air outlet pipe is connected to the other end of the first air inlet pipe, and the other end of the second air outlet pipe is connected to the other end of the second air inlet pipe; the control unit is a PLC controller, and the control unit is electrically connected to the first pulse valve and the second pulse valve respectively.

[0013] An integrated wastewater treatment method, utilizing an integrated wastewater treatment device, includes the following steps: Step 1: Start the air compressor to bring the gas pressure in the storage tank up to the process requirements; Step 2: The control system controls the pulse unit to generate the set first pulse gas and second pulse gas; Step 3: According to the set pulse cycle, the first pulse gas is continuously supplied to the top plate. The first pulse gas is sprayed downward at an angle through several first aeration holes, acting on the water and MBR membrane modules, causing the top plate to rise and causing several MBR membrane modules to swing and deform, eventually bringing the several MBR membrane modules into a vertical state; the second pulse gas is continuously supplied to the bottom plate and several support rods. The second pulse gas is sprayed upward at an angle through several second aeration holes, acting on the water and MBR membrane modules; at the same time, the second pulse gas is also sprayed horizontally in all directions at different heights through several third aeration holes, acting on the water and MBR membrane modules. Step 4: When the first pulse gas stops supplying gas to the top plate, the top plate and the MBR membrane module descend under the action of gravity, causing the MBR membrane module, which was in a vertical position, to relax again.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The integrated wastewater treatment equipment provided in this embodiment of the invention uses a pulse unit to generate pulsed gas with a set pulse duration and interval, which is then introduced into the cavities of the top and bottom plates. A top plate lifting support unit is installed on the upper part of the MBR membrane module to control the opening and closing of the downward air injection from the first aeration holes, thereby achieving the raising and lowering of the top plate.

[0015] When the first aeration hole sprays gas downwards, the top plate experiences an upward reaction force, causing it to gradually rise to a new equilibrium state under the combined influence of the upward spring force and the reaction force. When the first aeration hole stops aeration, the top plate gradually descends back to its initial equilibrium state. During this rising and falling process, the membrane module deforms accordingly. The continuous decrease or increase in deformation alters the contact position and area of ​​impurities on the membrane surface, making it easier for impurities to detach. This effectively reduces impurity adhesion to the membrane surface, decreases membrane fouling, increases the efficiency of the MBR membrane module, reduces backwashing intervals, and saves aeration volume. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the integrated sewage treatment equipment according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the lifting support unit in an embodiment of the present invention; Figure 3 This is a structural schematic diagram of the lower part of the top plate (upper part of the bottom plate) in an embodiment of the present invention; Figure 4 This is a schematic diagram of the lifting sleeve in an embodiment of the present invention; Figure 5 This is a schematic diagram of the pulse gas time distribution of the first, second, and third aeration holes within a cycle.

[0017] The labels in the attached diagram are as follows: 1-MBR membrane module, 2-top plate, 21-first aeration hole, 22-mounting body, 3-support rod, 31-third aeration hole, 4-first air inlet pipe, 5-lifting sleeve, 51-body, 52-annular groove, 6-positioning shaft, 7-spring, 8-bottom plate, 81-top surface, 82-second aeration hole, 9-second air inlet pipe, 10-sealing plate, L-groove width of the annular groove, H-length of the spring after it extends upwards, h-dimension of the positioning shaft extending into the lifting sleeve after the spring extends upwards. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1As shown, an integrated wastewater treatment device includes: an MBR membrane module 1, a top plate 2, support rods 3, a bottom plate 8, a lifting support unit, and a pulse unit. Several MBR membrane modules 1 are arranged in a circular array and installed between the top plate 2 and the bottom plate 8. The bottom plate 8 is horizontally positioned at the bottom of the tank. Several support rods 3 are evenly distributed in a circular array and vertically fixed to the top of the bottom plate 8. The circles formed by connecting the axes of the support rods 3 on the same horizontal plane are coaxial with the top plate 2 and the bottom plate 8. The bottom end of the top plate 2 is connected to the top end of several support rods 3 through a lifting support unit that can extend and retract with the rise and fall of the top plate 2. The lifting support unit is located between several MBR membrane modules 1. The top plate 2 is a hollow sealed cavity structure. The bottom end face of the top plate 2 is densely covered with several first aeration holes 21 that communicate with the inner cavity of the top plate 2. The inner cavity of the top plate 2 is connected to the output end of the pulse unit. The pulse unit periodically supplies the inner cavity of the top plate 2 with first pulse gas, causing the top plate 2 to rise or fall periodically, thereby driving several MBR membrane modules 1 to deform periodically.

[0020] like Figure 3 As shown, the bottom end of the top plate 2 and the top end of the bottom plate 8 are respectively provided with a number of mounting bodies 22 arranged in a circular array. The number of mounting bodies 22 in the upper part corresponds one-to-one with the number of mounting bodies 22 in the lower part. The upper and lower ends of the number of MBR membrane modules 1 are respectively mounted on the number of mounting bodies 22 in the upper part and the number of mounting bodies 22 in the lower part. When the first pulse gas is not introduced into the top plate 2, the distance between the bottom end face of the top plate 2 and the top end face of the bottom plate 8 is 20~60mm smaller than the length of the MBR membrane module 1 in the straightened state, so that the membrane has an appropriate amount of relaxation (that is, the membrane produces appropriate pre-deformation) to ensure that the MBR membrane module 1 deforms when the top plate 2 rises.

[0021] As the top plate 2 moves upward, the deformation of the MBR membrane module 1, which is in a pre-deformed state, gradually decreases, gradually forming a vertical membrane. This continuous decrease in deformation is equivalent to the MBR membrane module 1 undergoing a reverse deformation based on its original reverse deformation. This continuous decrease in deformation changes the contact position and area of ​​impurities on the membrane surface, making it easier for impurities to detach and effectively reducing membrane fouling. During the upward movement of the top plate 2, the elastic force of the spring 7 gradually decreases, and the upward speed of the top plate 2 also gradually decreases. When the top plate 2 reaches the set state under the action of the upward elastic force and reaction force of the spring 7, it reaches a new equilibrium state, meaning it stops moving upward, and the lower end of the top plate 2 remains tightly attached to the upper surface of the spring 7. Due to the combined effects of water flow fluctuations, the gas ejection from each aeration hole, and the elastic force of the spring 7, the top plate 2 (including the lifting sleeve) located above each spring 7 also experiences slight fluctuations, ensuring that the top plate 2 remains in a floating state regardless of whether it is in the upward state or the new equilibrium state, thus accelerating the removal of impurities from the surface of the MBR membrane module 1. Its swing amplitude is related to the stiffness of the spring, the inner and outer diameters of the spring, the length of the spring, the diameter of the spring wire, the pitch, the number of springs and their distribution, etc., so that the MBR membrane module 1 set below the top plate 2 swings slightly in sync, thereby accelerating the removal of impurities on the surface of the MBR membrane module 1, effectively reducing membrane contamination and improving the service life of the membrane.

[0022] As the top plate 2 moves downward, it relaxes the vertically positioned MBR membrane module 1, gradually increasing the membrane's deformation. This increasing deformation alters the contact position and area of ​​impurities on the membrane surface, making them easier to detach and further reducing membrane fouling. During the descent of the top plate 2, the elastic force of the spring 7 gradually increases, and its descent speed gradually decreases. When the top plate 2 and the MBR membrane module 1 reach their initial equilibrium state, the top plate 2 stops moving downward, and the lower end of the top plate 2 and the upper end of the spring 7 are tightly fitted together.

[0023] Due to the combined effects of water flow fluctuations, the gas ejection from each aeration hole, and the elastic force of each spring, the top plate 2 (including the lifting sleeve) located above each spring also experiences slight fluctuations. This ensures that the top plate 2 remains in a floating state, whether in its descending or initial balanced state, causing it to oscillate and accelerating the removal of impurities from the surface of the MBR membrane module 1. The MBR membrane module 1 located below the top plate 2 also oscillates slightly in sync, further facilitating the removal of impurities from its surface, effectively reducing membrane fouling, and extending membrane lifespan.

[0024] Both the top plate 2 and the bottom plate 8 have circular cross-sections, and the cross-sectional dimensions of the top plate 2 are equal to those of the bottom plate 8. The number of support rods 3 is 6 to 16, and they are arranged in a circular array, located on 1 / 2 to 3 / 4 of the radius of the cross-sectional circle of the bottom plate 8.

[0025] like Figure 2 and 4 As shown, the lifting support unit includes: a lifting sleeve 5, a positioning shaft 6, a spring 7, and a sealing plate 10. Several positioning shafts 6, springs 7, and sealing plates 10 are provided, each corresponding to one of several support rods 3. Several sealing plates 10 are fixedly connected to the top ends of several support rods 3. Several positioning shafts 6 are vertically fixedly connected to the top ends of several sealing plates 10. The positioning shafts 6 are coaxially arranged with the support rods 3. Several springs 7 are sleeved on the positioning shafts 6, with the inner diameter of the springs 7 matching the outer diameter of the positioning shafts 6 to ensure that the springs 7 can move along the positioning shafts 6. The spring 7 extends upward or compresses downward; the two ends of the spring 7 press against the bottom end of the lifting sleeve 5 and the top end of the corresponding sealing plate 10 respectively; the lifting sleeve 5 includes: a body 51 and an annular groove 52. The body 51 is circular and coaxially fixedly connected to the bottom end surface of the top plate 2. The bottom end of the body 51 is provided with an annular groove 52 coaxial with it. The annular groove 52 is coaxially arranged with the axis of several support rods 3 evenly distributed in the circumferential direction on the same horizontal plane to form a circle; the groove width of the annular groove 52 is L and is clearance-fitted with the positioning shaft 6. The upper parts of several positioning shafts 6 are vertically slidably connected in the annular groove 52.

[0026] The length of the spring 7 after it extends upward is H, and H is less than its free length, which ensures that when the top plate 2 rises to a new equilibrium position, the spring 7 is still in a compressed state. H is less than the length of the positioning shaft 3. At the same time, the dimension h of the positioning shaft 6 extending into the lifting sleeve 5 after the spring 7 extends upward is 40~80mm. Both of these factors together ensure the stable operation of the lifting sleeve 5.

[0027] When the first pulse gas is not introduced into the top plate 2, due to the fluctuation of the water flow and the elastic force of the springs 7, the top plate 2 (including the lifting sleeve) located above each spring 7 also fluctuates slightly, causing the top plate 2 to float and thus swing accordingly. Simultaneously, the MBR membrane module 1 located below the top plate 2 swings slightly, making it easier for impurities on the surface of the MBR membrane module 1 to detach, effectively reducing membrane fouling and improving membrane lifespan. The MBR membrane module 1, which is always in a floating state, accelerates the removal of impurities from the membrane surface, overcoming the limitation of existing technologies where impurities can only be removed during gas flushing.

[0028] When the first pulse gas is continuously introduced into the top plate 2, the gas sprayed downwards from the first aeration hole 21 acts on the water below and the MBR membrane module 1, simultaneously expanding the scouring range of the MBR membrane module 1 in both the height and radial directions. The lower part of the top plate 2 is subjected to an upward reaction force. Under the action of the upward elastic force and reaction force, the top plate 2 (including the MBR membrane module) in the initial equilibrium state moves upward to a set height, at which the top plate 2 reaches a new equilibrium state. During the upward process and the new equilibrium state, the lower end face of the top plate 2 is always acted upon by the elastic force of the spring 7. The combined action of multiple springs 7 keeps the top plate 2 (including the MBR membrane module) in a floating state at different heights, causing corresponding oscillations. The oscillating state of the MBR membrane module 1 accelerates the removal of impurities from the membrane surface.

[0029] The bottom surface of the top plate 2 is a convex spherical surface. Several first aeration holes 21 are densely distributed on the bottom surface of the top plate 2 except for the mounting bodies 22 on it. The axes of the several first aeration holes 21 intersect at the center of the spherical surface. The diameter of the first aeration holes 21 is 0.1~0.6mm. When the first pulse gas is introduced into the top plate 2, the gas is sprayed outward from the first aeration holes 21 at an angle downward to flush the MBR membrane module 1 below, thereby expanding the flushing range of the MBR membrane module 1 in both height and radius directions.

[0030] The base plate 8 is a hollow, sealed cavity structure. The top surface 81 of the base plate 8 is a convex spherical surface. In addition to the mounting parts 22 on the top surface 81, the top surface 81 of the base plate 8 is densely covered with a number of second aeration holes 82. The axes of the number of second aeration holes 82 intersect at the center of the sphere. The diameter of the second aeration holes 82 is 0.1~0.6mm. The inner cavity of the base plate 8 is connected to the output end of the pulse unit. The pulse unit periodically supplies second pulse gas to the inner cavity of the base plate 8. When the second pulse gas is introduced into the base plate 8, the gas is sprayed obliquely upward and outward from the second aeration holes 82 to flush the MBR membrane module 1 above, thereby expanding the flushing range of the MBR membrane module 1 in both the height and radius directions.

[0031] When the top plate 2 is in the rising state, causing the MBR membrane module 1 to deform, or when the top plate 2 is in the falling state, causing the MBR membrane module 1 to deform, the continuous decrease or increase in the amount of deformation causes the contact position and contact area of ​​impurities on the membrane surface to change continuously. The adhesion between impurities and the membrane surface also gradually decreases. The high-speed gas sprayed downward from the first aeration hole 21 on the top plate 2 and the high-speed gas sprayed upward from the second aeration hole 82 on the bottom plate 8 accelerate the shedding of impurities from the membrane surface and effectively reduce membrane fouling.

[0032] The support rod 3 is a circular tube structure. The lower end of the support rod 3 is connected to the inner cavity of the base plate 8, and the top end of the support rod 3 is sealed by the corresponding sealing plate 10. Several third aeration holes 31 are densely distributed in the circumferential direction of the tube wall of the support rod 3. The diameter of the third aeration holes 31 is 0.1~1mm. When the second pulse gas is introduced into the base plate 8, gas is horizontally sprayed from the third aeration holes 31 along the height of the support rod 3 and in the circumference of the support rod 3 to flush the MBR membrane module 1 inside and outside. This expands the flushing range of the MBR membrane module 1 in the height direction and also expands the flushing range of the MBR membrane module 1 in the radial direction. When the top plate 2 is rising and deforming the MBR membrane module 1, or when the top plate 2 is falling and deforming the MBR membrane module 1, the continuous decrease or increase in the amount of deformation causes the contact position and contact area of ​​impurities on the membrane surface to change continuously. The adhesion between impurities and the membrane surface also gradually decreases. The high-speed gas injected horizontally in the circumferential direction by the third aeration hole 31 on the support rod 3 at different heights accelerates the removal of impurities from the membrane surface in the inner and outer circumferential directions with each support rod 3 as the axis in the height direction.

[0033] The integrated sewage treatment equipment also includes: a control unit, with one end of the first air inlet pipe 4 connected to the top of the top plate 2 and one end of the second air inlet pipe 9 connected to the side wall of the bottom plate 8; a pulse unit including: a storage tank, a first air outlet pipe, a first pulse valve, a second air outlet pipe, and a second pulse valve, with one end of the first and second air outlet pipes connected in parallel to the inner cavity of the storage tank, the first pulse valve installed on the first air outlet pipe, the second pulse valve installed on the second air outlet pipe, the other end of the first air outlet pipe connected to the other end of the first air inlet pipe 4, and the other end of the second air outlet pipe connected to the other end of the second air inlet pipe 9; the control unit is a PLC controller, electrically connected to the first and second pulse valves respectively; the control unit controls the opening and closing of the first pulse valve to form a first pulse gas at the outlet of the first air outlet pipe; the control unit controls the opening and closing of the second pulse valve to form a second pulse gas at the outlet of the second air outlet pipe; by controlling and adjusting each valve through the control unit, the corresponding pulse duration, pulse interval, and pulse cycle are achieved.

[0034] like Figure 5 As shown, the pulse period acting on the top plate 2 (first aeration hole 21) is T = T1 + T2, the pulse period acting on the bottom plate 8 (second aeration hole 82) is T = T3 + T4, and the pulse period acting on the support rod 3 (third aeration hole 31) is equal to the pulse period acting on the bottom plate 8, T = T3 + T4, T1 + T2 = T3 + T4. Where T1 = 60~120s, T2 = 120~360s, T3 = T1 + (60~90s), and T4 = T1 + T2 - T3.

[0035] T1 is the duration of the first pulse gas, meaning that after time T1, the first pulse gas stops supplying gas to the top plate 2; T2 is the time when the first pulse gas stops supplying gas; T1 < T2, meaning the duration of the first pulse gas is less than the time when the first pulse gas stops supplying gas; T3 is the duration of the second pulse gas, meaning that after time T3, the second pulse gas stops supplying gas to the bottom plate 8 (including the support rod 3); T4 is the time when the second pulse gas stops supplying gas. The sum of the durations of continuous supply and cessation of the first and second pulse gases is equal, meaning the cycles of the first and second pulse gases are equal. Within any cycle, since T3 > T1, after time T3, both the first and second pulse gases are simultaneously in a state of cessation of supply to reduce the aeration volume.

[0036] An integrated wastewater treatment method includes the following steps: 1. Start the air compressor to bring the gas pressure in the storage tank up to the process requirements; 2. The control system controls the pulse unit to form the corresponding states of the first pulse gas and the second pulse gas as set. 3. According to the set pulse periods T=T1+T2 and T=T3+T4: 3.1. Top Plate T1 Stage: The first pulse gas continuously supplies gas to the top plate 2. The gas sprayed downwards from the first aeration hole 21 acts on the water below and the MBR membrane module 1. The lower part of the top plate 2 is subjected to an upward reaction force. Under the action of the upward elastic force and reaction force, the top plate 2 (including the MBR membrane module) in the initial equilibrium state moves upward to a set height. At this height, the top plate 2 is in a new equilibrium state. During the rising process and the new equilibrium state, the lower end face of the top plate 2 is always acted upon by the elastic force of the spring 7. The combined action of multiple springs 7 keeps the top plate 2 (including the MBR membrane module) in a floating state at different heights, resulting in corresponding oscillation. The oscillating state of the MBR membrane module 1 accelerates the removal of impurities from the membrane surface. When the top plate 2 rises and causes the MBR membrane module 1 to deform in the opposite direction, the continuous decrease in the amount of deformation causes the contact position and contact area of ​​impurities on the membrane surface to continuously change, and the adhesion between impurities and the membrane surface gradually decreases, making it easier for impurities on the membrane surface to detach. 3.2, Base Plate (Support Rod) T3 Stage: Simultaneously, the second pulse gas continuously supplies gas to the base plate 8 and support rod 3. The high-speed gas injected horizontally in the circumferential direction from the third aeration hole 31 on the support rod 3 at different heights accelerates the removal of impurities from the membrane surface in the inner and outer circumferential directions along the axis of each support rod 3. The gas injected downwards from the first aeration hole 21 on the top plate 2 and the gas injected upwards from the bottom plate 8 act on the continuously deforming MBR membrane module 1, also accelerating the removal of impurities from the membrane surface. 3.3, Top Plate T2 Stage: The first pulse gas supply to the top plate 2 stops. At this time, the reaction force acting on the lower part of the top plate 2 rapidly decreases to 0. Under the influence of gravity, the top plate 2 and the MBR membrane module 1 gradually move downward from the new equilibrium state, causing the vertically positioned MBR membrane module 1 to relax again. This gradually increases the deformation of the membrane. The continuous increase in deformation changes the contact position and contact area of ​​impurities on the membrane surface, making it easier for impurities to fall off and further reducing membrane fouling. During the descent of the top plate 2, the elastic force of the spring 7 gradually increases, and its descent speed gradually decreases. When the top plate 2 and the MBR membrane module 1 reach the initial equilibrium state, the top plate 2 stops moving downward. 3.4 Since T3 = T1 + (60~90s), when the top plate 2 and MBR membrane module 1 move downwards and reach the initial equilibrium state, the second pulse gas continues to supply gas to the bottom plate 8 and support rod 3. The high-speed gas injected horizontally in the circumferential direction from the third aeration holes 31 on the support rod 3 at different heights accelerates the removal of impurities from the membrane surface in the inner and outer circumferential directions along the axis of each support rod 3 in the height direction; the gas injected upwards from the inclined bottom plate 8 acts on the constantly deforming MBR membrane module 1, which also accelerates the removal of impurities from the membrane surface. 3.5. Base Plate (Support Rod) T4 Stage: The second pulse gas supply to the base plate 8 and support rod 3 stops. At this time, the first pulse gas supply to the top plate 2 is still stopped. The top plate 2 and MBR membrane module 1 are in their original state. Due to the fluctuation of the water flow and the elastic force of the spring 7, the top plate 2 (including the lifting sleeve) located on top of each spring 7 also fluctuates slightly, causing the top plate 2 to float and swing accordingly. The MBR membrane module 1 located below the top plate 2 swings slightly simultaneously, making it easier for impurities on the surface of the MBR membrane module 1 to fall off, effectively reducing membrane fouling and improving membrane lifespan. The MBR membrane module 1, which is always in a floating state, accelerates the removal of impurities from the membrane surface. 4. The first and second pulse gas supply phases of T2 and T4 end simultaneously, completing one cycle of continuous gas supply and gas supply cessation, and the next cycle is repeated.

[0037] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of the present invention, based on the technical essence of the present invention, shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. An integrated sewage treatment equipment, characterized in that, include: The MBR membrane module (1), top plate (2), support rods (3), bottom plate (8), lifting support unit and pulse unit are provided. The MBR membrane module (1) is provided in a plurality of units, which are arranged in a ring array and installed between the top plate (2) and the bottom plate (8). The support rods (3) are evenly arranged in a plurality of units and are vertically fixed to the top of the bottom plate (8). The bottom end of the top plate (2) is connected to the top end of the support rods (3) through a lifting support unit that can extend and retract with the rise and fall of the top plate (2). The top plate (2) is a hollow sealed cavity structure. The bottom end face of the top plate (2) is densely covered with a plurality of first aeration holes (21) that communicate with the inner cavity of the top plate (2). The inner cavity of the top plate (2) is connected to the output end of the pulse unit. The pulse unit periodically supplies the inner cavity of the top plate (2) with first pulse gas, causing the top plate (2) to rise or fall periodically, thereby driving the plurality of MBR membrane modules (1) to deform periodically.

2. The integrated wastewater treatment plant of claim 1, wherein: The bottom end of the top plate (2) and the top end of the bottom plate (8) are respectively provided with a number of mounting bodies (22) arranged in a circular array. The upper mounting bodies (22) and the lower mounting bodies (22) are arranged one-to-one. The upper and lower ends of the MBR membrane modules (1) are respectively mounted on the upper mounting bodies (22) and the lower mounting bodies (22). When the first pulse gas is not introduced into the top plate (2), the distance between the bottom end face of the top plate (2) and the top end face of the bottom plate (8) is less than the length of the MBR membrane module (1) in the straightened state.

3. The integrated wastewater treatment device of claim 2, wherein: The cross-sections of the top plate (2) and the bottom plate (8) are both circular, and the cross-sectional dimension of the top plate (2) is equal to that of the bottom plate (8); a number of support rods (3) are arranged in a circular array, and the circle formed by connecting the axes of the support rods (3) on the same horizontal plane is coaxial with the top plate (2) and the bottom plate (8), and is located on 1 / 2 to 3 / 4 of the radius of the cross-sectional circle of the bottom plate (8).

4. The integrated sewage treatment equipment according to claim 3, characterized in that: The lifting support unit includes: a lifting sleeve (5), a positioning shaft (6), a spring (7), and a sealing plate (10). Several positioning shafts (6), springs (7), and sealing plates (10) are provided, each corresponding to one of several support rods (3). Several sealing plates (10) are fixedly connected to the top ends of several support rods (3), and several positioning shafts (6) are vertically fixedly connected to the top ends of several sealing plates (10). Several positioning shafts (6) are coaxially arranged with several support rods (3), and several springs (7) are... Springs (7) are respectively sleeved on several positioning shafts (6). The two ends of the springs (7) press against the bottom end of the lifting sleeve (5) and the top end of the corresponding sealing plate (10). The lifting sleeve (5) includes a body (51) and an annular groove (52). The body (51) is circular and coaxially fixedly connected to the bottom end surface of the top plate (2). The bottom end of the body (51) is provided with an annular groove (52) coaxial with it. The upper parts of several positioning shafts (6) are vertically slidably connected in the annular groove (52).

5. The integrated sewage treatment equipment according to claim 4, characterized in that: When the first pulse gas is continuously introduced into the top plate (2), the upper part of the positioning shaft (6) is still located in the annular groove (52).

6. The integrated sewage treatment equipment according to claim 5, characterized in that: The bottom surface of the top plate (2) is a convex spherical surface. Several first aeration holes (21) are densely distributed on the bottom surface of the top plate (2) except for the mounting bodies (22) on it. The axes of the several first aeration holes (21) intersect at the center of the spherical surface.

7. The integrated sewage treatment equipment according to claim 6, characterized in that: The base plate (8) is a hollow sealed cavity structure. The top surface (81) of the base plate (8) is a convex spherical surface. The top surface (81) of the base plate (8) is densely covered with a number of second aeration holes (82) except for the mounting body (22) on it. The axes of the number of second aeration holes (82) intersect at the center of the spherical surface. The inner cavity of the base plate (8) is connected to the output end of the pulse unit. The pulse unit periodically supplies second pulse gas to the inner cavity of the base plate (8).

8. The integrated sewage treatment equipment according to claim 7, characterized in that: The support rod (3) is a circular tube structure. The lower end of the support rod (3) is connected to the inner cavity of the bottom plate (8). The top end of the support rod (3) is sealed by the corresponding sealing plate (10). The support rod (3) has a number of third aeration holes (31) densely distributed in the circumferential direction of the tube wall.

9. The integrated sewage treatment equipment according to claim 8, characterized in that: Also includes: The control unit has a top plate (2) connected to one end of a first air inlet pipe (4) and a bottom plate (8) connected to one end of a second air inlet pipe (9). The pulse unit includes a storage tank, a first air outlet pipe, a first pulse valve, a second air outlet pipe, and a second pulse valve. One end of the first air outlet pipe and the second air outlet pipe are connected in parallel to the inner cavity of the storage tank. The first pulse valve is installed on the first air outlet pipe, and the second pulse valve is installed on the second air outlet pipe. The other end of the first air outlet pipe is connected to the other end of the first air inlet pipe (4), and the other end of the second air outlet pipe is connected to the other end of the second air inlet pipe (9). The control unit is a PLC controller, and the control unit is electrically connected to the first pulse valve and the second pulse valve respectively.

10. An integrated wastewater treatment method, utilizing the integrated wastewater treatment equipment as described in any one of claims 9, characterized in that: Includes the following steps: Step 1: Start the air compressor to bring the gas pressure in the storage tank up to the process requirements; Step 2: The control system controls the pulse unit to generate the set first pulse gas and second pulse gas; Step 3: According to the set pulse cycle, the first pulse gas is continuously supplied to the top plate (2). The first pulse gas is sprayed downward at an angle through several first aeration holes (21) and acts on the water and MBR membrane module (1), causing the top plate (2) to rise and drive several MBR membrane modules (1) to swing and deform. The several MBR membrane modules (1) are finally in a vertical state. The second pulse gas is continuously supplied to the bottom plate (8) and several support rods (3). The second pulse gas is sprayed upward at an angle through several second aeration holes (82) and acts on the water and MBR membrane module (1). At the same time, the second pulse gas is also sprayed horizontally in all directions at different heights through several third aeration holes (31) and acts on the water and MBR membrane module (1). Step 4: When the first pulse gas stops supplying gas to the top plate (2), the top plate (2) and the MBR membrane module (1) descend under the action of gravity, so that the MBR membrane module (1), which was in a vertical state, returns to a relaxed state.

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