An integrated rural domestic sewage MBR membrane treatment system

Abstract

The present invention discloses an integrated rural domestic sewage MBR membrane treatment system, comprising a membrane treatment chamber, a sludge treatment chamber, and a lifting device. The membrane treatment chamber is provided with an MBR membrane module and a water suction pump. The MBR membrane module is composed of a plurality of MBR hollow fiber membranes, and the water suction pump is connected to the MBR membrane module. The present invention provides an integrated rural domestic sewage MBR membrane treatment system, which can automatically and meticulously clean the MBR hollow fiber membranes and automatically remove adhered sludge, eliminating manual cleaning, improving equipment efficiency, and reducing operating costs. At the same time, the sludge in the membrane treatment chamber 1 is squeezed and dewatered to reduce the water content in the discharged sludge, thereby obtaining more clean water and saving water resources.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, in particular to an integrated rural domestic sewage MBR membrane treatment system. Background Art

[0002] The MBR membrane treatment system is a commonly used sewage treatment system with the advantages of small footprint and high sewage treatment capacity. The essence of the MBR membrane treatment system is to connect the water pump with the MBR hollow fiber membrane, and the sludge and other microorganisms in the sewage are isolated through the MBR hollow fiber membrane. Water molecules enter the MBR hollow fiber membrane to treat the sewage.

[0003] However, due to long-term filtration, a large amount of sludge will accumulate on the surface of the MBR hollow fiber membrane, which affects the filtration speed. The existing method of cleaning sludge is through gas explosion, which cannot effectively clean the adhered sludge. After a long period of operation, the equipment needs to be shut down and the MBR hollow fiber membrane needs to be manually flushed. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides an integrated rural domestic sewage MBR membrane treatment system.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions: an integrated rural domestic sewage MBR membrane treatment system, including a membrane treatment chamber, a sludge treatment chamber and a lifting device, wherein an MBR membrane group and a water suction pump are arranged in the membrane treatment chamber, the MBR membrane group is composed of a plurality of MBR hollow fiber membranes, the water suction pump is connected to the MBR membrane group, and the sewage in the membrane treatment chamber passes through the MBR membrane group and is discharged outwards, and the membrane treatment chamber is also provided with a cleaning device, the cleaning device comprises an extrusion plate and a cleaning rack, the extrusion plate is slidably arranged in the membrane treatment chamber, the cleaning rack is arranged on the extrusion plate, and a cleaning brush is arranged on the cleaning rack, and the cleaning brush elastically presses on the MBR hollow fiber membrane, and a screw rod is arranged on the extrusion plate, and a screw sleeve is rotatably arranged on the side wall of the membrane treatment chamber, the screw rod is cooperated with the screw sleeve, and the screw sleeve is connected to a drive mechanism arranged in the membrane treatment chamber through a rotating shaft. The motor is connected, and the rotation of the silk sleeve can drive the cleaning frame to slide up and down, so that the cleaning brush can clean the MBR hollow fiber membrane. The cross-section of the extrusion plate is consistent with the cross-section of the lower end of the membrane treatment chamber. When the extrusion plate moves downward, the sludge at the lower end of the membrane treatment chamber can be squeezed. The extrusion plate is provided with a water permeable hole, and a water permeable membrane is provided on the water permeable hole. The water permeable hole is connected with the cleaning brush through a pipe. When the extrusion plate moves downward to squeeze the sludge, water molecules enter the water permeable hole through the water permeable membrane and are discharged from the cleaning brush, so that the MBR hollow fiber membrane can be flushed while being brushed. A blanking port is provided at the lower end of the membrane treatment chamber, and a switch plate is provided on the blanking port. After the extrusion plate moves downward a certain distance, the switch plate automatically opens, and the squeezed sludge enters the lifting device from the blanking port, and the lifting device lifts the squeezed sludge into the sludge treatment chamber.

[0006] Its beneficial effect is that the sludge in the membrane treatment chamber is discharged after being squeezed and dehydrated, so that more clean water can be filtered out of the sewage treatment. At the same time, the MBR hollow fiber membrane is effectively and meticulously cleaned during the sludge squeezing and dehydration process, so that the MBR hollow fiber membrane can work for a long time, reducing the cost of manual cleaning, and at the same time, the equipment does not need to be shut down for a long time to run, thereby improving water purification efficiency.

[0007] In the above scheme, preferably, a first gear is slidably provided on the driving motor, the rotating shaft is rotatably provided on the membrane processing chamber, and one end is connected to the wire sleeve through a bevel gear, a second gear and a first wire wheel are provided on the rotating shaft, the second gear is meshed with the first gear, and the lifting device includes a guide shaft and a lifting bucket, the guide shaft is provided on the membrane processing chamber, the lifting bucket guide is slidably provided on the guide shaft, one end of the lifting bucket is connected to the first pull rope, and the other end is provided on the first wire wheel.

[0008] In the above scheme, preferably, the lifting bucket is designed as an inclined bucket, and a blocking plate is elastically slidingly provided on the lifting bucket. A top contact block is provided at the upper end of the sludge treatment chamber. When the lifting bucket is lifted upward, the blocking plate can touch the top contact block and slide downward. At the same time, the side of the lifting bucket opens, and the sludge inside automatically enters the sludge treatment chamber.

[0009] In the above scheme, preferably, a second shaft is provided on the membrane processing chamber, a third gear and a second pulley are provided on the second shaft, the first gear can engage with the third gear when sliding forward, one end of the second pulley is connected to the second pulley, and the other end is provided on the switch plate.

[0010] In the above scheme, preferably, one end of the first elastic member is pressed against the upper end of the switch plate, and the other end is pressed against the membrane treatment chamber, and an electric push rod is also provided on the side of the membrane treatment chamber, and a linkage plate is provided at the front end of the electric push rod, and the first gear limit rotation is provided on the linkage plate, and the electric push rod can control the engagement and disengagement of the first gear and the third gear by extending and retracting it forward and backward.

[0011] In the above scheme, preferably, a pressure touch switch is provided on the side of the lower end of the membrane processing chamber, and the extrusion plate can press the pressure touch switch when sliding downward. The pressure touch switch controls the electric push rod to retract, and the height of the blanking port is less than the thickness of the extrusion plate.

[0012] The beneficial effects of the present invention are as follows: the present invention provides an integrated rural domestic sewage MBR membrane treatment system, which can automatically and meticulously clean the MBR hollow fiber membrane, automatically remove adhered sludge, eliminate the need for manual cleaning, improve equipment utilization efficiency, and reduce utilization costs. At the same time, the sludge in the membrane treatment chamber 1 is squeezed and dewatered to reduce the water content in the discharged sludge, thereby obtaining more clean water and saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the present invention.

[0014] Figure 2 It is a cross-sectional view of the present invention.

[0015] Figure 3 It is a schematic diagram of the interior of the present invention.

[0016] Figure 4 It is a side sectional view of the present invention.

[0017] Figure 5 It is a partial enlarged view of the transmission component of the present invention.

[0018] Figure 6 This is a partially enlarged cross-sectional view of the cleaning frame of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: Figures 1-6 ,

[0020] An integrated rural domestic sewage MBR membrane treatment system, including a pretreatment tank, a membrane treatment chamber 1, a sludge treatment chamber 2 and a lifting device 3, the pretreatment tank is used to remove nitrogen and phosphorus from sewage, and the treated sewage automatically enters the membrane treatment chamber 1, an MBR membrane group 11 is provided in the membrane treatment chamber 1, the MBR membrane group 11 is composed of multiple MBR hollow fiber membranes 111, and a water suction port is provided on the MBR membrane group 11, a water suction pump is provided outside the membrane treatment chamber 1, and the water suction pump is connected to the water suction port through a pipeline, so that the sewage is filtered through the MBR hollow fiber membrane 111 and discharged outward, a cleaning device 4 is provided in the membrane treatment chamber 1, the cleaning device 4 includes an extrusion plate 41 and a cleaning frame 42, an extrusion chamber is provided at the lower end of the membrane treatment chamber 1, the cross section of the extrusion plate 41 is consistent with the cross section of the extrusion chamber, and in the initial state, the position of the extrusion plate 41 is higher than the extrusion chamber. The sludge in the membrane treatment chamber 1 can automatically enter the squeezing chamber, and a water permeable hole 412 is provided on the lower end surface of the squeezing plate 41. The MBR membrane is provided on the water permeable hole 412. After the squeezing plate 41 slides downward and enters the squeezing chamber, it continues to move downward to squeeze the sludge water in the squeezing chamber, and the water enters the water permeable hole 412 from the MBR membrane. The squeezing plate 41 and the cleaning frame 42 are connected by a hard pipe, so that the squeezing plate 41 moves up and down to drive the cleaning frame 42 to move up and down synchronously. At the same time, the water in the water permeable hole 412 is transmitted to the cleaning frame 42 through the hard pipe. The cleaning frame 42 is located in the MBR membrane group 11, and a cleaning brush 42 is provided on the cleaning frame 42. The cleaning brush 421 presses on the MBR hollow fiber membrane 111. At the same time, a nozzle is also provided at the cleaning brush 421, and the water entering the water permeable hole 412 can be sprayed out from the nozzle.

[0021] When the squeezing plate 41 moves downward, it drives the cleaning frame 42 to move downward together, thereby scraping the MBR hollow fiber membrane 111, and scraping the sludge and attachments adhering to the MBR hollow fiber membrane 111 onto the cleaning brush 421. After the cleaning frame 42 descends and enters the squeezing chamber, the squeezing plate 41 continues to move downward, thereby squeezing the sludge and sewage in the squeezing chamber. The squeezing chamber is located at the lower end of the membrane treatment chamber 1, so sludge is deposited and accumulated at this time. During the squeezing process, water enters the water permeable holes 412 from the MBR membrane. When moving downward, water is sprayed from the cleaning frame 42, thereby flushing the cleaning brush 421. In this flushing process, the MBR hollow fiber membrane 111 is flushed together, thereby flushing the MBR hollow fiber membrane 111 and the cleaning brush 421.

[0022] A screw 411 is provided on the extrusion plate 41, and a wire sleeve 12, a rotating shaft 13, a second shaft 16 and an electric push rod 17 are rotatably provided on the side wall of the membrane processing chamber 1. A bevel gear is provided on the wire sleeve 12, and the wire sleeve 12 is cooperated with the screw 411. A bevel gear is also provided on one end of the rotating shaft 13 to engage with the bevel gear on the wire sleeve 12. At the same time, a second gear 131 and a first wire wheel 132 are provided on the rotating shaft 13. A driving motor 14 is provided on the outside of the membrane processing chamber 1. A first gear 141 is provided on the rotating shaft of the driving motor 14 for guiding sliding. A rotating groove is provided on the first gear 141. A linkage plate 171 is provided at the front end of the electric push rod 17. The linkage plate 171 is limited and rotated in the rotating groove. A third gear 161 and a second wire wheel 162 are provided on the second shaft 16.

[0023] In the initial state, the electric push rod 17 is in the pushing state, and the extrusion plate 41 is located at the upper end of the extrusion chamber. At this time, the first gear 141 is only engaged with the second gear 131. At this time, the driving motor 14 rotates, driving the rotating shaft 13 to rotate, thereby rotating the wire sleeve 12. The wire sleeve 12 rotates, causing the screw rod 411 to move downward, driving the extrusion plate 41 to move downward, thereby scraping the MBR hollow fiber membrane 111 and squeezing and removing water from the sludge to obtain sludge with low water content. After dropping to a certain extent, the side of the extrusion plate 41 presses on the pressure touch switch 18, and the pressure touch switch 18 controls the electric push rod 17 to contract, thereby driving the first gear 141 to move forward, so that the first gear 141 is engaged with the second gear 131 and the third gear 161 at the same time, thereby driving the motor 14 to simultaneously drive the rotating shaft 13 and the second shaft 16 to rotate.

[0024] A blanking port 15 is provided at the lower end of the membrane processing chamber 1, and a switch plate 151 is slidably provided on the blanking port 15, and one end of the first elastic member 152 is contacted at the upper end of the switch plate 151, and the other end is contacted on the top surface of the sliding cavity, and one end of the second pulley 163 is connected to the upper end of the switch plate 151, and the other end is connected to the second wire wheel 162, and the height of the blanking port 15 is less than the thickness of the extrusion plate 41. When the extrusion plate 41 is pressed on the bottom surface of the membrane processing chamber 1, the side of the extrusion plate 41 is always pressed on the pressure switch 18.

[0025] After the extrusion plate 41 presses on the pressure-touch switch 18, the driving motor 14 drives the rotating shaft 13 and the second shaft 16 to rotate at the same time, so that the extrusion plate 41 continues to move downward, and at the same time the second pulley 162 rotates to wind the second pull rope 163 around the second pulley 162, pulling the switch plate 151 to move upward, so that the blanking port 15 opens, and the extrusion plate 41 continues to move downward so that the dehydrated sludge is squeezed out from the blanking port 15. When the extrusion plate 41 touches the bottom surface of the membrane treatment chamber 1, all the squeezed sludge is discharged, and at the same time, the control switch is pressed to cause the driving motor 14 to start reversing, thereby driving the extrusion plate 41 to move upward, and at the same time loosening the second pull rope 163, so that the switch plate 151 re-blocks the blanking port 15 under the action of the first elastic member 152. After the extrusion plate 41 leaves the pressure-touch switch 18, the electric push rod 17 automatically extends. At this time, the first gear 141 only meshes with the second gear 131.

[0026] The lifting device 3 includes a guide shaft 31 and a lifting bucket 32. The guide shaft 31 is arranged on the membrane treatment chamber 1. The lifting bucket 32 ​​is guided and slidably arranged on the guide shaft 31. One end of the first pulley 133 is connected to the lifting bucket 32, and the other end is arranged on the first pulley 132. The lifting bucket 32 ​​is an inclined bucket design. A guide column is arranged on the side of the lifting bucket 32. A blocking plate 321 is slidingly arranged on the guide column, and a second elastic member 322 is sleeved on the guide column, and its two ends respectively touch the bottom surface of the side derivative plate of the lifting bucket 32 ​​and the blocking plate 321 when the blocking plate 321 is not subjected to force, so that the side of the lifting bucket 32 ​​is closed under the action of the second elastic member 322. A top contact block 21 is provided at the upper end of the sludge treatment chamber 2. When the lifting bucket 32 ​​rises, the derivative plate on the side of the blocking plate 321 can touch the top contact block 21, and the upper end of the guide shaft 31 is higher than the upper edge of the sludge treatment chamber 2.

[0027] When the first pulley 132 is in the initial state, the first pull rope 133 is wound around the first pulley 132, and the lifting bucket 32 ​​is located at the upper end of the guide shaft 31. The derivative plate of the blocking plate 321 thereon contacts the top contact block 21, and the second elastic member 322 is in a compressed state. The side of the lifting bucket 32 ​​is in an open state. At this time, the rotating shaft 13 rotates to loosen the first pull rope 133, and the lifting bucket 32 ​​slides downward under the action of its own gravity. During the descent, the blocking plate 321 is separated from the pressure contact with the top contact block 21, so that the side of the lifting bucket 32 ​​is automatically closed. When the extrusion plate 41 contacts the pressure switch 18, the lifting bucket 32 ​​is already at the lower end, that is, the upper opening of the lifting bucket 32 ​​is low. At the lower edge of the drop port 15, the drop port 15 is opened at this time, and the sludge after dewatering automatically falls into the lifting bucket 32. After all the sludge falls into the lifting bucket 32, that is, when the extrusion plate 41 presses against the bottom surface of the membrane treatment chamber 1, the drive motor 14 starts to reverse, thereby rewinding the first pull rope 133, thereby pulling the lifting bucket 32 ​​upward. When it moves to the upper end of the guide shaft 31, the derivative plate of the blocking plate 321 touches the top contact block 21, and the side of the lifting bucket 32 ​​opens. The inner cavity of the lifting bucket 32 ​​is set as a slope, so the sludge in the lifting bucket 32 ​​automatically falls into the sludge treatment chamber 2. At this point, the cleaning of the MBR hollow fiber membrane 111 and the sludge extraction are completed.

[0028] Its working principle or usage is as follows:

[0029] The membrane processing chamber 1 is also provided with a timing device, which controls the start of the drive motor 14. In the initial state, the electric push rod 17 is in the pushing state, the extrusion plate 41 is located at the upper end of the extrusion chamber, the first gear 141 is only engaged with the second gear 131, the first pull rope 133 is wrapped around the first pulley 132, and the lifting bucket 32 ​​is located at the upper end of the guide shaft 31.

[0030] At this time, the timing device controls the driving motor 14 to start, driving the rotating shaft 13 to rotate, thereby rotating the wire sleeve 12, and the wire sleeve 12 rotates, so that the screw rod 411 moves downward, driving the extrusion plate 41 to move downward, thereby scraping the MBR hollow fiber membrane 111, and scraping the sludge and attachments adhering to the MBR hollow fiber membrane 111 onto the cleaning brush 421. After the cleaning frame 42 descends into the extrusion chamber, the extrusion plate 41 continues to move downward, thereby squeezing the sludge and sewage in the extrusion chamber. The extrusion chamber is located at the lower end of the membrane treatment chamber 1. At this time, sludge is deposited and accumulated. During the extrusion process, water enters the permeation chamber from the MBR membrane. In the water hole 412, when moving downward, water is sprayed out from the cleaning frame 42, thereby flushing the cleaning brush 421. During the flushing process, the MBR hollow fiber membrane 111 is also flushed, thereby flushing the MBR hollow fiber membrane 111 and the cleaning brush 421. After descending to a certain extent, the side of the extrusion plate 41 presses on the pressure touch switch 18, and the pressure touch switch 18 controls the electric push rod 17 to contract, thereby driving the first gear 141 to move forward, so that the first gear 141 is engaged with the second gear 131 and the third gear 161 at the same time, thereby driving the motor 14 to simultaneously drive the rotating shaft 13 and the second shaft 16 to rotate.

[0031] The extrusion plate 41 continues to move downward, and at the same time, the second pulley 162 rotates to wrap the second pull rope 163 around the second pulley 162, pulling the switch plate 151 upward, so that the blanking port 15 opens, and the extrusion plate 41 continues to move downward to squeeze the dehydrated sludge out from the blanking port 15. When the extrusion plate 41 touches the bottom surface of the membrane treatment chamber 1, all the squeezed sludge is discharged, and when the rotating shaft 13 rotates, the first pull rope 133 is loosened, and the lifting bucket 32 ​​slides downward under the action of its own gravity. During the descending process, when the extrusion plate 41 presses on the pressure switch 18, the lifting bucket 32 ​​is already at the bottom end, that is, the upper opening of the lifting bucket 32 ​​is lower than the lower edge of the blanking port 15, so the dehydrated sludge discharged from the blanking port 15 all falls into the lifting bucket 32.

[0032] When the extrusion plate 41 presses against the bottom surface of the membrane treatment chamber 1, it presses the control switch, thereby controlling the drive motor 14 to reverse, thereby rewinding the first pull rope 133, and pulling the lifting bucket 32 ​​upward. When it moves to the upper end of the guide shaft 31, the derivative plate of the blocking plate 321 touches the top contact block 21, and the side of the lifting bucket 32 ​​opens. The inner cavity of the lifting bucket 32 ​​is set as a slope, so the sludge in the lifting bucket 32 ​​automatically falls into the sludge treatment chamber 2. At this point, the cleaning of the MBR hollow fiber membrane 111 and the sludge extraction are completed.

[0033] When the drive motor 14 starts to reverse, it drives the extrusion plate 41 to move upward, loosening the second pull rope 163, so that the switch plate 151 re-blocks the blanking port 15 under the action of the first elastic member 152. After the extrusion plate 41 leaves the pressure switch 18, the electric push rod 17 automatically extends. At this time, the first gear 141 only engages with the second gear 131, and everything returns to the initial state.

[0034] At this time, the timing device controls the driving motor 14 to start again, so that the device starts to clean the sludge and the MBR hollow fiber membrane 111 again.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An integrated rural domestic sewage MBR membrane treatment system, characterized by: It includes a membrane treatment chamber, a sludge treatment chamber and a lifting device. The membrane treatment chamber is equipped with an MBR membrane group and a water suction pump. The MBR membrane group is composed of multiple MBR hollow fiber membranes. The water suction pump is connected to the MBR membrane group to discharge the sewage in the membrane treatment chamber through the MBR membrane group. The membrane treatment chamber is also provided with a cleaning device, which includes an extrusion plate and a cleaning frame. The extrusion plate is slidably arranged in the membrane treatment chamber, and the cleaning frame is arranged on the extrusion plate. A cleaning brush is provided on the cleaning frame, and the cleaning brush elastically presses on the MBR hollow fiber membrane. A screw is provided on the extrusion plate, and a wire sleeve is rotatably provided on the side wall of the membrane treatment chamber. The screw is cooperated with the wire sleeve, and the wire sleeve is connected to a drive motor arranged in the membrane treatment chamber through a rotating shaft. The rotation of the wire sleeve can drive the cleaning frame to slide up and down, so that the cleaning brush can clean the MBR hollow fiber membrane. The cross section of the squeezing plate is consistent with the cross section of the lower end of the membrane treatment chamber. When the squeezing plate moves downward, it can squeeze the sludge at the lower end of the membrane treatment chamber. The squeezing plate is provided with a water-permeable hole, and a water-permeable membrane is provided on the water-permeable hole. The water-permeable hole is connected to the cleaning brush through a pipe. When the squeezing plate moves downward to squeeze the sludge, water molecules enter the water-permeable hole through the water-permeable membrane and are discharged from the cleaning brush, so that the MBR hollow fiber membrane can be flushed while being brushed. The lower end of the membrane treatment chamber is provided with a drop port, and a switch plate is provided on the drop port. After the extrusion plate moves downward a certain distance, the switch plate automatically opens, and the extruded sludge enters the lifting device from the drop port, and the lifting device lifts the extruded sludge into the sludge treatment chamber; A first gear is slidingly provided on the driving motor, the rotating shaft is rotatably provided on the membrane processing chamber, and one end is connected to the wire sleeve through a bevel gear, a second gear and a first wire wheel are provided on the rotating shaft, the second gear is meshed with the first gear, the lifting device includes a guide shaft and a lifting bucket, the guide shaft is provided on the membrane processing chamber, the lifting bucket guide is slidingly provided on the guide shaft, one end of the lifting bucket is connected to the first pull rope, and the other end is provided on the first wire wheel.

2. The integrated rural domestic sewage MBR membrane treatment system according to claim 1 is characterized in that: The lifting bucket is designed as an inclined bucket, and a blocking plate is elastically slidingly provided on the lifting bucket. A top contact block is provided at the upper end of the sludge treatment chamber. When the lifting bucket is lifted upward, the blocking plate can touch the top contact block and slide downward. At the same time, the side of the lifting bucket opens, and the sludge inside automatically enters the sludge treatment chamber.

3. The integrated rural domestic sewage MBR membrane treatment system according to claim 1 is characterized in that: The membrane processing chamber is provided with a second shaft, and a third gear and a second pulley are provided on the second shaft. The first gear can be engaged with the third gear by sliding forward. One end of the second pulley is connected to the second pulley, and the other end is provided on the switch plate.

4. The integrated rural domestic sewage MBR membrane treatment system according to claim 3 is characterized in that: One end of the first elastic member is pressed against the upper end of the switch plate, and the other end is pressed against the membrane treatment chamber. An electric push rod is also provided on the side of the membrane treatment chamber, and a linkage plate is provided at the front end of the electric push rod. The first gear is limited and rotated on the linkage plate. The electric push rod can control the engagement and disengagement of the first gear and the third gear by extending and retracting it forward and backward.

5. The integrated rural domestic sewage MBR membrane treatment system according to claim 4 is characterized in that: A pressure-touch switch is provided on the side surface of the lower end of the membrane processing chamber. The extrusion plate can press the pressure-touch switch when it slides downward. The pressure-touch switch controls the electric push rod to retract, and the height of the blanking port is less than the thickness of the extrusion plate.

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