Energy-saving ceramic membrane filtration device and method

Abstract

The application discloses an energy-saving ceramic membrane filtering equipment and method, relates to the technical field of ceramic membrane filtering, and comprises a base. A material conveying system and a tubular ceramic membrane filtering system are arranged above the base. The tubular ceramic membrane filtering system comprises two bottom pipes fixedly arranged on the top surface of the base. A plurality of membrane shells are arranged side by side above each bottom pipe. A plurality of ceramic membrane cores arranged in a ring array are arranged in each membrane shell. In the application, the liquid interruption triggering assembly triggers the mesh push plate above to lift the hard steel wire shaft, drives the annular scraper to move upwards in the ceramic membrane channel, drives the annular scraper on the hard steel wire shaft to move downwards by means of the reset assembly, and then realizes the up-and-down reciprocating movement of the annular scraper, timely removes the membrane wall pollutants, the dynamic unblocking mode avoids the problem that the traditional equipment needs to be frequently stopped and disassembled for cleaning due to membrane blockage, reduces energy loss in the process of stopping and restarting, and simultaneously reduces the manual cleaning cost.

Description

Technical Field

[0001] This invention belongs to the field of ceramic membrane filtration technology, specifically an energy-saving ceramic membrane filtration device and method. Background Technology

[0002] Ceramic membrane filtration equipment is a type of wastewater treatment equipment that utilizes ceramic membrane technology. Ceramic membranes possess excellent chemical stability, high-temperature resistance, high strength, and good anti-fouling properties, making them particularly suitable for wastewater treatment. The working principle involves first filtering large suspended particles (such as silt and liquid residue) in the wastewater using a precision filter, and then introducing them into the ceramic membrane tube. By utilizing the size of the membrane pores and surface characteristics, the separation and removal of pollutants such as organic matter and microorganisms in the wastewater are achieved.

[0003] However, wastewater has a complex composition and high pollutant content. During long-term operation, pollutants such as colloids and organic matter dissolved in the wastewater can easily accumulate and clog the membrane channels, leading to a decrease in membrane flux and an increase in filtration resistance. The equipment needs to continuously increase the operating pressure to maintain treatment efficiency, which not only increases energy consumption but also accelerates the aging of membrane modules. In the existing solutions, periodic shutdowns for manual cleaning require interrupting the wastewater treatment process, resulting in reduced treatment efficiency. Moreover, conventional backwashing technology has limited cleaning effect and is difficult to remove stubborn pollutants in the membrane channels in a timely manner. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention proposes an energy-saving ceramic membrane filtration device and method.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An energy-saving ceramic membrane filtration device includes a base, a material conveying system and a tubular ceramic membrane filtration system installed on the top of the base. The tubular ceramic membrane filtration system includes two bottom pipes fixedly installed on the top surface of the base. Several membrane shells are arranged side by side above each bottom pipe. Several ceramic membrane cores arranged in a ring array are installed inside each membrane shell. Several ceramic membrane channels are arranged vertically in a ring array in each ceramic membrane core.

[0007] Furthermore, the bottom end of each membrane housing is connected to a connecting tank via a flange, and the bottom end of the connecting tank is connected to a bottom pipe via a flange. The connecting tank is equipped with a liquid cut-off triggering component, which automatically opens or cuts off the passage between the connecting tank and the membrane housing.

[0008] The tubular ceramic membrane filtration system also includes multiple sets of unclogging components, the same number as the number of ceramic membrane cores. Each set of unclogging components includes a cylindrical seat located above a corresponding ceramic membrane core. The bottom surface of the cylindrical seat is provided with a rigid steel wire shaft, the same number as the number of ceramic membrane channels on a single ceramic membrane core. Several annular scrapers are equidistantly sleeved on the outer side of each rigid steel wire shaft, and each annular scraper is connected to the outer wall of the rigid steel wire shaft through a second fixing frame, located inside the corresponding ceramic membrane channel.

[0009] Furthermore, the tubular ceramic membrane filtration system also includes a reset component for driving the unclogging component to reset;

[0010] The top of the liquid cut-off triggering component is provided with a fixed shaft, and a mesh push plate for lifting the unblocking component is fixedly connected to the top of the fixed shaft.

[0011] As a further preferred embodiment of this technical solution: the liquid cut-off triggering component includes an annular fixing seat fixedly disposed on the inner wall of the connecting tank, a sealing plug with a bottom opening is movably disposed on the inner side of the annular fixing seat, and the fixing shaft is fixedly connected to the top surface of the sealing plug, and a plurality of raw material liquid channel holes are opened in an annular array on the side wall of the sealing plug.

[0012] A sealing ring block is fixedly connected to the inner wall of the annular fixing seat, and the outer wall of the sealing plug is sealed to the inner wall of the sealing ring block.

[0013] The liquid cut-off triggering assembly also includes a first sleeve mounted on the inner wall of the connecting tank via a first fixing bracket. A sliding sleeve is slidably mounted on the inner side of the first sleeve. The sliding sleeve is fixedly connected to the top surface of the sealing plug. A disc spring is fixedly mounted on the top inner wall of the first sleeve, located between the first sleeve and the sliding sleeve.

[0014] As a further preferred embodiment of this technical solution: the top of each membrane housing is connected to a top shell via a flange, and multiple sets of the reset components are installed inside the top shell;

[0015] Each set of reset components includes a second sleeve fixedly connected inside the top shell. The second sleeve has a slot adapted to the cylindrical base and with its opening facing downwards. An abutment block is slidably connected inside the slot. A reset spring is also provided inside the slot. The two ends of the reset spring are fixedly connected to the inner wall of the slot and the top surface of the abutment block, respectively.

[0016] As a further preferred embodiment of this technical solution, each of the hard steel wire shafts is provided with an abutment ball at its bottom.

[0017] As a further preferred embodiment of this technical solution: a fixed limiting frame is provided on the inner wall of each membrane shell, and the fixed limiting frame has a second slot with the same number as the ceramic membrane cores. The second slot is an inverted conical groove for locking the bottom of the ceramic membrane core. Furthermore, a movable limiting frame can be detachably installed inside each membrane shell. The movable limiting frame has a first slot with the same size and number as the second slot, and the first slot is an upright conical groove.

[0018] As a further preferred embodiment of this technical solution: the tubular ceramic membrane filtration system further includes a circulation pump disposed on the top surface of the base, the working end of the circulation pump being connected to any one of the bottom pipes, and the two bottom pipes being connected through a connecting pipe, the circulation pump being used to realize the circulation of the secondary raw material liquid;

[0019] Each membrane shell has a concentrated liquid outlet on its side wall, located above the ceramic membrane core, and the two concentrated liquid outlets facing each other are connected by a concentrated liquid delivery pipe.

[0020] As a further preferred embodiment of this technical solution: the conveying system includes a raw material liquid storage tank disposed on the top surface of the base, the raw material liquid storage tank being connected to the bottom pipe via a conveying pipe, and a conveying pump being disposed in the middle of the conveying pipe, and a precision filter being connected in series between the conveying pipe and the bottom pipe via a connecting pipe, the precision filter being disposed on the top surface of the base.

[0021] As a further preferred embodiment of this technical solution: a separation and collection system is also installed on the base, the separation and collection system including a filtrate tank and a concentrate tank;

[0022] Furthermore, a filtrate outlet is provided on the side wall of the membrane shell, located on the side of the ceramic membrane core. The filtrate outlet is connected to the filtrate tank through a filtrate delivery pipe, and the second concentrate delivery pipe is also connected to the bottom pipe.

[0023] The concentrate tank is connected to the concentrate delivery pipe No. 1 via the No. 2 concentrate delivery pipe.

[0024] As a further preferred embodiment of this technical solution: several membrane shells arranged side by side are connected by a circulation pipe.

[0025] As a further preferred embodiment of this technical solution: an energy-saving ceramic membrane filtration method includes the following steps:

[0026] S1. Store the primary raw material liquid to be filtered into the raw material liquid storage tank, start the feed pump, and transport the primary raw material liquid along the feed pipe to the precision filter. The precision filter filters out large particulate suspended matter in the primary raw material liquid to form secondary raw material liquid. The secondary raw material liquid continues to be transported to the bottom pipe of the tubular ceramic membrane filtration system.

[0027] S2. The secondary feed liquid is diverted through the bottom pipe into the connecting tank at the bottom of each membrane housing. The elastic potential energy of the disc spring in the liquid cut-off trigger component causes the sealing plug to press against the sealing ring block, blocking the feed liquid channel hole. The secondary feed liquid continues to accumulate in the connecting tank, and the pressure gradually increases until the pressure of the secondary feed liquid rises to exceed the elastic potential energy of the disc spring. The secondary feed liquid enters the membrane housing, and the pressure in the connecting tank drops sharply. The disc spring pushes the sealing plug to reset and block the channel. This cycle is repeated to achieve intermittent delivery of the secondary feed liquid. When the sealing plug moves upward, it drives the mesh push plate to lift the hard steel wire shaft through the fixed shaft. The annular scraper slides upward to clean the inner wall of the membrane channel. After the sealing plug resets, the steel wire shaft loses support, and the reset spring drives it and the scraper to move downward to complete the secondary cleaning.

[0028] S3. The secondary feed liquid is filtered in the ceramic membrane core. The filtrate flows into the filtrate tank and is collected. The filter residue flows upward along the ceramic membrane channel and is sent to the concentrate tank and collected. Then, the passage between the No. 2 concentrate delivery pipe and the bottom pipe is opened, and the circulation pump is started to send the filter residue back to the membrane shell for circulation filtration. This process is repeated multiple times. The filtrate enters the filtrate tank again, and the filter residue enters the concentrate tank again.

[0029] S4. After the filtration operation is completed, flushing liquid is introduced into the membrane housing. The flushing liquid flows continuously inside each membrane housing through the circulation pipe between the membrane housings to thoroughly flush the ceramic membrane core and the inside of the membrane housing. The waste liquid generated during flushing is discharged into the concentrate tank along with the concentrate.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] 1. In this invention, the liquid cut-off triggering component triggers the mesh push plate above to lift the rigid steel wire shaft, which drives the annular scraper to move upward in the ceramic membrane channel. The reset component drives the annular scraper on the rigid steel wire shaft to move downward, thereby realizing the reciprocating motion of the annular scraper to remove contaminants from the membrane wall in a timely manner. This dynamic cleaning method avoids the problem of frequent shutdowns and disassembly for cleaning due to membrane blockage in traditional equipment, reduces energy consumption during shutdown and restart, and lowers the cost of manual cleaning.

[0032] 2. In this invention, the liquid interruption triggering component uses the elastic potential energy of the disc spring to control the intermittent delivery of the raw material liquid, so that the liquid entering the membrane shell forms a pulse pressure impact, which can flush out the contaminants attached in the flow channel. In addition, it works with the annular scraper to clear blockages, making the blockage clearing effect even better.

[0033] 3. In this invention, the reset component and the unblocking component adopt a separate design, which makes the disassembly, replacement and maintenance of the membrane core and scraper vulnerable parts more convenient, shortens the equipment maintenance time and reduces energy consumption in non-production state. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0035] Figure 2 This is a partial structural schematic diagram of the tubular ceramic membrane filtration system of the present invention;

[0036] Figure 3 This is a cross-sectional view of the membrane shell of the present invention;

[0037] Figure 4 This is a cross-sectional view of the connecting tank of the present invention;

[0038] Figure 5 This is an exploded view of the liquid cut-off triggering component of the present invention;

[0039] Figure 6 Exploded views of the movable limiting frame, the fixed limiting frame, and the ceramic membrane core of the present invention;

[0040] Figure 7 This is a schematic diagram of the unblocking component of the present invention;

[0041] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0042] Figure 9 for Figure 7 Enlarged diagram of point B in the middle.

[0043] Legend: 1. Base; 2. Feeding system; 21. Raw material liquid storage tank; 22. Feeding pipe; 23. Feeding pump; 24. Precision filter; 25. Connecting pipe; 3. Tubular ceramic membrane filtration system; 301. Bottom pipe; 302. Membrane shell; 3021. Concentrate outlet; 3023. Filtrate outlet; 303. Circulation pump; 304. No. 1 concentrate delivery pipe; 305. Connecting tank; 306. Top shell; 307. Ceramic membrane core; 3071. Ceramic membrane channel; 308. Movable limit frame; 3081. No. 1 slot; 309. Fixed limit frame; 3091. No. 2 slot; 310. Liquid cut-off trigger assembly; 3101. Annular fixed seat; 3102. 3103, No. 1 sleeve; 3104, No. 1 fixing frame; 3105, disc spring; 3106, sliding sleeve; 3107, raw material liquid channel hole; 3108, sealing ring block; 311, fixing shaft; 312, mesh push plate; 313, reset assembly; 3131, No. 2 sleeve; 3132, reset spring; 3133, abutting block; 314, unblocking assembly; 3141, cylindrical seat; 3142, hard steel wire shaft; 3143, No. 2 fixing frame; 3144, annular scraper; 315, abutting ball; 4. Separation and collection system; 41, filtrate tank; 42, concentrate tank; 43, filtrate conveying pipe; 44, No. 2 concentrate conveying pipe; 5. Circulation pipeline. Detailed Implementation

[0044] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figures 1-9 This application provides an energy-saving ceramic membrane filtration device, including a base 1. A conveying system 2 and a tubular ceramic membrane filtration system 3 are installed above the base 1. The conveying system 2 is used to filter large suspended particles (such as mud and sand, and residue in the feed liquid) in the primary feed liquid to form a secondary feed liquid. The secondary feed liquid is then conveyed to the tubular ceramic membrane filtration system 3 for further filtration. The primary feed liquid and secondary feed liquid are referred to here only for ease of description. The tubular ceramic membrane filtration system 3 includes two bottom pipes 301 fixedly installed on the top surface of the base 1. Several membrane shells 302 are arranged side by side above each bottom pipe 301. Several ceramic membrane cores 307 arranged in a ring array are installed inside each membrane shell 302. Several ceramic membrane channels 3071 are arranged vertically in a ring array.

[0046] Furthermore, the bottom end of each membrane housing 302 is connected to a connecting tank 305 via a flange. The bottom end of the connecting tank 305 is connected to the bottom pipe 301 via a flange. It should be noted that a one-way valve is installed between the bottom pipe 301 and the connecting tank 305, which allows liquid to flow unidirectionally from the bottom pipe 301 to the connecting tank 305. This is existing technology and is therefore not shown. It is only used to illustrate the direction of liquid flow. The connecting tank 305 is equipped with a liquid cut-off trigger component 310, which automatically opens or cuts off the passage between the connecting tank 305 and the membrane housing 302.

[0047] The tubular ceramic membrane filtration system 3 also includes multiple sets of unclogging components 314, the same number as the ceramic membrane cores 307. Each set of unclogging components 314 includes a cylindrical seat 3141 located above a corresponding ceramic membrane core 307. The bottom surface of the cylindrical seat 3141 is provided with a rigid steel wire shaft 3142, the same number as the number of ceramic membrane channels 3071 on a single ceramic membrane core 307. Several annular scrapers 3144 are equidistantly sleeved on the outer side of each rigid steel wire shaft 3142. Each annular scraper 3144 is connected to the outer wall of the rigid steel wire shaft 3142 through a second fixing frame 3143 and is located inside the corresponding ceramic membrane channel 3071. In order to avoid the annular scrapers 3144 scratching the inner wall of the ceramic membrane channel 3071, the annular scrapers 3144 are preferably made of polytetrafluoroethylene material with a hardness lower than that of the ceramic membrane core 307.

[0048] Furthermore, the tubular ceramic membrane filtration system 3 also includes a reset component 313 for driving the unclogging component 314 to reset;

[0049] The top of the liquid cut-off trigger assembly 310 is provided with a fixed shaft 311, and the top of the fixed shaft 311 is fixedly connected with a mesh push plate 312 for lifting the unblocking assembly 314. It should be noted that the mesh push plate 312 is set as a mesh, which allows the liquid to pass through and can lift the unblocking assembly 314.

[0050] Specifically, when the secondary feed liquid enters the tubular ceramic membrane filtration system 3, it is transported to the interior of multiple membrane housings 302 through the bottom pipe 301. The liquid cut-off triggering component 310, added between the bottom pipe 301 and the membrane housing 302, can intermittently release the feed liquid (defined as the general term for the secondary feed liquid and the filter residue circulating into the membrane housing 302) into the interior of the membrane housing 302. This causes the feed liquid pressure in the connecting tank 305 to increase, impacting the flow channel and causing the contaminants attached to the flow channel to be knocked off, reducing the pressure of blockage. More importantly, during the opening of the channel, the liquid cut-off triggering component 310 can trigger the fixed shaft 311 to move upward, and then the mesh pusher plate 312 can lift up the multiple rigid steel wire shafts 3142 above. Each rigid steel wire shaft The second fixed bracket 3143 on 3142 drives the annular scraper 3144 to move upward inside the ceramic membrane channel 3071. When the liquid cut-off trigger component 310 blocks the channel, multiple rigid steel wire shafts 3142 will lose their support force. Then, under the action of the reset component 313, the rigid steel wire shafts 3142 and the annular scraper 3144 on them will move downward and reset. Thus, the ceramic membrane channel 3071 on the ceramic membrane core 307 is cleaned in time during the filtration process, reducing the frequency of downtime to clean the contaminants attached to the ceramic membrane core 307. Furthermore, under the action of the liquid cut-off trigger component 310, the pressure is changed regularly to impact the attached substances and prevent blockage of the ceramic membrane channel 3071, with good anti-blockage effect.

[0051] Furthermore, the liquid cut-off trigger assembly 310 includes an annular fixing seat 3101 fixedly disposed on the inner wall of the connecting tank 305. A sealing plug 3102 with a bottom opening is movably disposed on the inner side of the annular fixing seat 3101. Several raw material liquid channel holes 3107 are arranged in annular array on the side wall of the sealing plug 3102.

[0052] A sealing ring block 3108 is fixedly connected to the inner wall of the annular fixing seat 3101. The outer wall of the sealing plug 3102 is sealed to the inner wall of the sealing ring block 3108. It should be noted that the sealing ring block 3108 is preferably made of rubber.

[0053] The liquid cut-off trigger assembly 310 also includes a first sleeve 3103 mounted on the inner wall of the connecting tank 305 via a first fixing bracket 3104. A sliding sleeve 3106 is slidably mounted on the inner side of the first sleeve 3103, and a sealing ring is provided at the open end of the first sleeve 3103 to block the gap between the first sleeve 3103 and the sliding sleeve 3106, preventing the secondary raw material liquid from entering the interior of the first sleeve 3103 and thus affecting the use of the disc spring 3105. The sliding sleeve 3106 is fixedly connected to the top surface of the sealing plug 3102, and a disc spring 3105 is fixedly mounted on the top inner wall of the first sleeve 3103. The disc spring 3105 has high fatigue resistance and long service life and is located between the first sleeve 3103 and the sliding sleeve 3106. It should be noted that when the sliding sleeve 3106 slides to its maximum extent inside the first sleeve 3103, the sealing plug 3102 will still not separate from the sealing ring block 3108.

[0054] Specifically, the secondary feed liquid is conveyed from the conveying system 2 to the tubular ceramic membrane filtration system 3. After filling the bottom pipe 301, the secondary feed liquid is diverted into the connecting tank 305. Initially, the pressure of the secondary feed liquid is insufficient to push the sealing plug 3102 upwards. However, the conveying system 2 continuously delivers the liquid, gradually increasing the pressure. When the pressure exceeds the elastic potential energy of the disc spring 3105, the sealing plug 3102 moves upwards, and the height of the feed liquid channel hole 3107 is higher than that of the sealing ring block 3108. The secondary feed liquid passes over the sealing plug 3102 and enters the membrane housing 302 from the inside of the connecting tank 305. At the same time, the water pressure decreases again, and the disc spring 3105 pushes the sealing plug 3102 downward to reset under the action of elastic potential energy. The feed liquid channel hole 3107 is blocked by the sealing ring block 3108. Then the above process is repeated to realize the intermittent delivery of secondary feed liquid from the connecting tank 305 to the membrane housing 302. That is, the water pressure impact force entering the membrane housing 302 is large, thereby reducing the probability of contaminant adhesion in the secondary feed liquid.

[0055] Furthermore, each membrane housing 302 has a top housing 306 connected to its top via a flange, and multiple sets of reset assemblies 313 are installed inside the top housing 306.

[0056] Each set of reset components 313 includes a second housing 3131 fixedly connected inside the top housing 306. The second housing 3131 has a slot that is adapted to the cylindrical seat 3141 and has an opening facing downward. An abutment block 3133 is slidably connected inside the slot. A reset spring 3132 is also provided inside the slot. The two ends of the reset spring 3132 are fixedly connected to the inner wall of the slot and the top surface of the abutment block 3133, respectively.

[0057] Specifically, the rigid steel wire shaft 3142 is inserted into the slot of the corresponding second sleeve 3131 directly above. Then, the top shell 306 is installed onto the membrane shell 302 using a flange. The cylindrical seat 3141 is inserted into the slot of the corresponding second sleeve 3131 above. As the rigid steel wire shaft 3142 moves upward, it pushes the cylindrical seat 3141 upward, thereby pushing the contact block 3133 upward. The return spring 3132 is compressed, and after the rigid steel wire shaft 3142 loses its support, the return spring 3132 pushes the cylindrical seat 3141 downward and resets it. This achieves the reset of the rigid steel wire shaft 3142. Furthermore, the reset assembly 313 and the unblocking assembly 314 are installed separately, which facilitates the disassembly of the unblocking assembly 314 and facilitates its replacement and cleaning.

[0058] Furthermore, each hard steel wire shaft 3142 is provided with an abutment ball 315 at its bottom, preferably a rubber ball, which can reduce the wear between the hard steel wire shaft 3142 and the mesh push plate 312.

[0059] Furthermore, each membrane housing 302 has a fixed limiting frame 309 on its inner wall. The fixed limiting frame 309 has a second slot 3091 with the same number as the ceramic membrane cores 307. The second slot 3091 is an inverted conical groove used to hold the bottom of the ceramic membrane core 307. Each membrane housing 302 also has a movable limiting frame 308 that can be detachably installed inside. The movable limiting frame 308 has a first slot 3081 with the same size and number as the second slot 3091. The first slot 3081 is an upright conical groove. This allows multiple ceramic membrane cores 307 to be held inside the membrane housing 302, making it easy to disassemble and replace the ceramic membrane cores 307.

[0060] Furthermore, the tubular ceramic membrane filtration system 3 also includes a circulation pump 303 disposed on the top surface of the base 1. The working end of the circulation pump 303 is connected to any one of the bottom pipes 301, and the two bottom pipes 301 are connected through a connecting pipe. The circulation pump 303 is used to realize the circulation of the secondary raw material liquid.

[0061] Each membrane housing 302 has a concentrate outlet 3021 on its side wall, located above the ceramic membrane core 307. Two opposite concentrate outlets 3021 are connected by a first concentrate delivery pipe 304, which enables the connection between multiple membrane housings 302 and facilitates the circulation of secondary feed liquid and filtrate inside the membrane housing 302.

[0062] Furthermore, the conveying system 2 includes a raw material liquid storage tank 21 installed on the top surface of the base 1. The raw material liquid storage tank 21 is used to store the primary raw material liquid. The raw material liquid storage tank 21 is connected to the bottom pipe 301 through a conveying pipe 22, and a conveying pump 23 is installed in the middle of the conveying pipe 22 to transport the primary raw material liquid inside the raw material liquid storage tank 21 to the inside of the bottom pipe 301. A precision filter 24 is connected in series between the conveying pipe 22 and the bottom pipe 301 through a connecting pipe 25. The precision filter 24 is installed on the top surface of the base 1 and is used to filter large suspended particles (such as mud, sand, and material residue) in the primary raw material liquid to form the secondary raw material liquid. It should be noted that the precision filter 24 is an existing product, and since this solution mainly solves the problem of the ceramic membrane core 307 being blocked by the secondary raw material liquid, only the precision filter 24 is used, and no further explanation is given.

[0063] Furthermore, a separation and collection system 4 is also installed on the base 1. The separation and collection system 4 includes a filtrate tank 41 and a concentrate tank 42. The filtrate tank 41 is used to store the filtrate, and the concentrate tank 42 is used to store the concentrate.

[0064] Furthermore, a filtrate outlet 3023 is provided on the side wall of the membrane housing 302, located on the side of the ceramic membrane core 307. The filtrate outlet 3023 is connected to the filtrate tank 41 through the filtrate delivery pipe 43.

[0065] The concentrate tank 42 is connected to the first concentrate delivery pipe 304 via the second concentrate delivery pipe 44. The second concentrate delivery pipe 44 is also connected to the bottom pipe 301. During this process, after the secondary feed liquid enters the membrane shell 302, it is divided into two parts. One part is defined as filtrate, and the molecular particle size is small enough to pass through the ceramic membrane core 307. It enters the interior of the filtrate tank 41 through the filtrate delivery pipe 43 and is collected. The other part of the contaminants cannot pass through the ceramic membrane core 307 and is defined as filter residue. It is transported from the inside of the ceramic membrane channel 3071 to the first concentrate delivery pipe 304, and then enters the concentrate tank 42 through the second concentrate delivery pipe 44.

[0066] Furthermore, several parallel membrane housings 302 are connected by a circulation pipe 5, which enables continuous flushing of the flushing fluid inside the membrane housing 302 during the backwashing operation.

[0067] Furthermore, solenoid valves (not shown in the figure) for controlling the on / off state of the pipelines are installed on the feed pipe 22, connecting pipe 25, bottom pipe 301, first concentrated liquid conveying pipe 304, filtrate conveying pipe 43, second concentrated liquid conveying pipe 44 and circulation pipe 5.

[0068] An energy-saving ceramic membrane filtration method includes the following steps:

[0069] S1. Store the primary raw material liquid to be filtered into the raw material liquid storage tank 21, start the feed pump 23, and transport the primary raw material liquid along the feed pipe 22 to the precision filter 24. The precision filter 24 filters out the large particulate suspended matter in the primary raw material liquid to form the secondary raw material liquid. The secondary raw material liquid continues to be transported to the bottom pipe 301 of the tubular ceramic membrane filtration system 3.

[0070] S2. The secondary feed liquid is diverted through the bottom pipe 301 into the connecting tank 305 at the bottom of each membrane housing 302. The elastic potential energy of the disc spring 3105 in the liquid cut-off trigger assembly 310 causes the sealing plug 3102 to press against the sealing ring block 3108, blocking the feed liquid channel hole 3107. The secondary feed liquid continues to accumulate in the connecting tank 305, and the pressure gradually increases until the pressure of the secondary feed liquid exceeds the elastic potential energy of the disc spring 3105, at which point the secondary feed liquid enters the membrane housing 302. 2. When the pressure inside the connecting tank 305 drops suddenly, the disc spring 3105 pushes the sealing plug 3102 to reset and block the channel. This cycle is repeated to achieve intermittent delivery of secondary raw material liquid. When the sealing plug 3102 moves upward, it drives the mesh push plate 312 to lift the hard steel wire shaft 3142 through the fixed shaft 311. The annular scraper 3144 slides upward to clean the inner wall of the membrane channel. After the sealing plug 3102 is reset, the steel wire shaft loses support. The reset spring 3132 drives it and the scraper to move downward to complete the secondary unblocking.

[0071] S3. The secondary feed liquid is filtered in the ceramic membrane core 307. The filtrate flows into the filtrate tank 41 and is collected. The filter residue flows upward along the ceramic membrane channel 3071 and is sent to the concentrate tank 42 and collected. Then, the passage between the second concentrate delivery pipe 44 and the bottom pipe 301 is opened, and the circulation pump 303 is started to send the filter residue back to the membrane shell 302 for circulation filtration. This process is repeated multiple times. The filtrate enters the filtrate tank 41 again, and the filter residue enters the concentrate tank 42 again.

[0072] S4. After the filtration operation is completed, flushing liquid is introduced into the membrane housing 302. The flushing liquid flows continuously inside each membrane housing 302 through the circulation pipe 5 between the membrane housings 302, and thoroughly flushes the ceramic membrane core 307 and the inside of the membrane housing 302. The waste liquid generated by flushing is discharged into the concentrate tank 42 along with the concentrate.

[0073] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. An energy-saving ceramic membrane filtration device, comprising a base (1), wherein a material conveying system (2) and a tubular ceramic membrane filtration system (3) are mounted above the base (1), characterized in that, The tubular ceramic membrane filtration system (3) includes two bottom tubes (301) fixedly installed on the top surface of the base (1). Several membrane shells (302) are arranged side by side above each bottom tube (301). Several ceramic membrane cores (307) arranged in a ring array are installed inside each membrane shell (302). Several ceramic membrane channels (3071) are arranged vertically in a ring array in each ceramic membrane core (307). Furthermore, the bottom end of each membrane housing (302) is connected to a connecting tank (305) via a flange. The bottom end of the connecting tank (305) is connected to the bottom pipe (301) via a flange. The connecting tank (305) is equipped with a liquid cut-off trigger assembly (310) to automatically open or cut off the passage between the connecting tank (305) and the membrane housing (302). The tubular ceramic membrane filtration system (3) also includes multiple sets of unclogging components (314) with the same number of ceramic membrane cores (307). Each set of unclogging components (314) includes a cylindrical seat (3141) located above a corresponding ceramic membrane core (307). The bottom surface of the cylindrical seat (3141) is provided with a rigid steel wire shaft (3142) with the same number of ceramic membrane channels (3071) on a single ceramic membrane core (307). Several annular scrapers (3144) are equidistantly sleeved on the outer side of each rigid steel wire shaft (3142). Each annular scraper (3144) is connected to the outer wall of the rigid steel wire shaft (3142) through a second fixing frame (3143) and is located on the inner side of the corresponding ceramic membrane channel (3071). Furthermore, the tubular ceramic membrane filtration system (3) also includes a reset component (313) for driving the unclogging component (314) to reset. The top of the liquid cut-off trigger assembly (310) is provided with a fixed shaft (311), and the top of the fixed shaft (311) is fixedly connected with a mesh push plate (312) for lifting the unblocking assembly (314). The liquid cut-off trigger assembly (310) includes an annular fixing seat (3101) fixedly disposed on the inner wall of the connecting tank (305). A sealing plug (3102) with a bottom opening is movably disposed on the inner side of the annular fixing seat (3101), and the fixing shaft (311) is fixedly connected to the top surface of the sealing plug (3102). A plurality of raw material liquid channel holes (3107) are opened in an annular array on the side wall of the sealing plug (3102). A sealing ring block (3108) is fixedly connected to the inner wall of the annular fixing seat (3101), and the outer wall of the sealing plug (3102) is sealed to the inner wall of the sealing ring block (3108). The liquid cut-off trigger assembly (310) also includes a first sleeve (3103) mounted on the inner wall of the connecting tank (305) via a first fixing bracket (3104). A sliding sleeve (3106) is slidably mounted on the inner side of the first sleeve (3103). The sliding sleeve (3106) is fixedly connected to the top surface of the sealing plug (3102). A disc spring (3105) is fixedly mounted on the top inner wall of the first sleeve (3103) between the first sleeve (3103) and the sliding sleeve (3106).

2. The energy-saving ceramic membrane filtration device according to claim 1, characterized in that, Each of the membrane housings (302) has a top shell (306) connected to its top via a flange, and multiple sets of the reset assemblies (313) are installed inside the top shell (306); Each of the reset components (313) includes a second sleeve (3131) fixedly connected inside the top shell (306). The second sleeve (3131) has a slot that is adapted to the cylindrical seat (3141) and opens downward. An abutment block (3133) is slidably connected inside the slot. A reset spring (3132) is also provided inside the slot. The two ends of the reset spring (3132) are fixedly connected to the inner wall of the slot and the top surface of the abutment block (3133), respectively.

3. The energy-saving ceramic membrane filtration device according to claim 1, characterized in that, Each of the aforementioned hard steel wire shafts (3142) has an abutment ball (315) at its bottom.

4. The energy-saving ceramic membrane filtration device according to claim 1, characterized in that, Each membrane shell (302) has a fixed limiting frame (309) on its inner wall. The fixed limiting frame (309) has a second slot (3091) with the same number as the ceramic membrane core (307). The second slot (3091) is an inverted conical groove used to fit into the bottom of the ceramic membrane core (307). Each membrane shell (302) also has a movable limiting frame (308) that can be detachably installed inside. The movable limiting frame (308) has a first slot (3081) with the same size and number as the second slot (3091). The first slot (3081) is an upright conical groove.

5. The energy-saving ceramic membrane filtration device according to claim 1, characterized in that, The tubular ceramic membrane filtration system (3) also includes a circulation pump (303) disposed on the top surface of the base (1). The working end of the circulation pump (303) is connected to any one of the bottom pipes (301), and the two bottom pipes (301) are connected through a connecting pipe. The circulation pump (303) is used to realize the circulation of secondary raw material liquid. Each of the membrane shells (302) has a concentrated liquid outlet (3021) on its side wall, located above the ceramic membrane core (307), and the two concentrated liquid outlets (3021) facing each other are connected by a concentrated liquid delivery pipe (304).

6. The energy-saving ceramic membrane filtration device according to claim 1, characterized in that, The material conveying system (2) includes a raw material liquid storage tank (21) installed on the top surface of the base (1). The raw material liquid storage tank (21) is connected to the bottom pipe (301) through a material conveying pipe (22). A material conveying pump (23) is installed in the middle of the material conveying pipe (22). A precision filter (24) is connected in series between the material conveying pipe (22) and the bottom pipe (301) through a connecting pipe (25). The precision filter (24) is installed on the top surface of the base (1).

7. The energy-saving ceramic membrane filtration device according to claim 1, characterized in that, The base (1) is also equipped with a separation and collection system (4), which includes a filtrate tank (41) and a concentrate tank (42). Furthermore, a filtrate outlet (3023) is provided on the side wall of the membrane housing (302), located on the side of the ceramic membrane core (307), and the filtrate outlet (3023) is connected to the filtrate tank (41) through the filtrate delivery pipe (43); The concentrate tank (42) is connected to the first concentrate delivery pipe (304) through the second concentrate delivery pipe (44), and the second concentrate delivery pipe (44) is also connected to the bottom pipe (301).

8. The energy-saving ceramic membrane filtration device according to claim 1, characterized in that, Several membrane shells (302) arranged side by side are connected by a circulation pipe (5).

9. An energy-saving ceramic membrane filtration method, characterized in that, An energy-saving ceramic membrane filtration device according to any one of claims 1-8 includes the following steps: S1. Store the primary raw material liquid to be filtered into the raw material liquid storage tank (21), start the feed pump (23), and transport the primary raw material liquid along the feed pipe (22) to the precision filter (24). The large particulate suspended matter in the primary raw material liquid is filtered through the precision filter (24) to form the secondary raw material liquid. The secondary raw material liquid is then transported to the bottom pipe (301) of the tubular ceramic membrane filtration system (3). S2. The secondary feed liquid is diverted through the bottom pipe (301) into the connecting tank (305) at the bottom of each membrane housing (302). The elastic potential energy of the disc spring (3105) in the liquid cut-off trigger assembly (310) causes the sealing plug (3102) to press against the sealing ring block (3108), blocking the feed liquid channel hole (3107). The secondary feed liquid continues to accumulate in the connecting tank (305), and the pressure gradually increases until the pressure of the secondary feed liquid rises above the elastic potential energy of the disc spring (3105). The secondary feed liquid then enters the membrane housing (302). 2) The pressure inside the connecting tank (305) drops suddenly, and the disc spring (3105) pushes the sealing plug (3102) to reset and block the channel. This cycle is repeated to realize the intermittent delivery of secondary raw material liquid. When the sealing plug (3102) moves upward, it drives the mesh push plate (312) to lift the hard steel wire shaft (3142) through the fixed shaft (311). The annular scraper (3144) slides upward to clean the inner wall of the membrane channel. After the sealing plug (3102) is reset, the steel wire shaft loses support, and the reset spring (3132) drives it and the scraper to move downward to complete the secondary unblocking. S3. The secondary feed liquid is filtered in the ceramic membrane core (307). The filtrate flows into the filtrate tank (41) and is collected. The filter residue flows upward along the ceramic membrane channel (3071) and is sent into the concentrate tank (42) and collected. Then, the passage between the second concentrate delivery pipe (44) and the bottom pipe (301) is opened, and the circulation pump (303) is started to send the filter residue back to the membrane shell (302) for circulation filtration. This process is repeated multiple times. The filtrate enters the filtrate tank (41) again, and the filter residue enters the concentrate tank (42) again. S4. After the filtration operation is completed, flushing liquid is introduced into the membrane housing (302). The flushing liquid flows continuously inside each membrane housing (302) through the circulation pipe (5) between the membrane housings (302) to thoroughly flush the ceramic membrane core (307) and the inside of the membrane housing (302). The waste liquid generated by flushing is discharged into the concentrate tank (42) along with the concentrate.

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