Ceramic membrane security filtration system capable of realizing self-cleaning

Abstract

The invention provides a self-cleaning ceramic membrane security filtration system. The self-cleaning ceramic membrane security filtration system comprises a ceramic membrane security filter; the ceramic membrane security filter comprises a bottom shell, a filter cavity and an upper cover; a plurality of internal pressure type ceramic membrane tubes are mounted between the bottom flow guide disc and the top flow guide disc; the water inlet pipe communicates to the bottom of the bottom shell; the water collecting tank is connected with the filter cavity through a connecting pipe; the elevation of the water inlet end of the water inlet pipe is higher than that of the top flow guide disc; the ceramic membrane security filtration system further comprises a siphon drainage pipe, the siphon drainage pipe comprises an inclined pipe section and a vertical pipe section, the inclined pipe section is communicated with the top of the upper cover, the vertical pipe section is communicated with the inclined pipe section, and the vertical pipe section extends downwards to the ground in the vertical direction; a siphon destroying hopper is mounted in the water collecting tank and is communicated with a connecting point of the inclined pipe section and the vertical pipe section through a siphon destroying pipe; and the maximum water level elevation of the water collecting tank is higher than that of the siphon breaking bucket. According to the invention, completely automatic filtration and self-cleaning of the internal pressure type ceramic membrane tube are realized.

Description

Technical Field

[0001] The invention relates to the technical field of security filters, in particular to a ceramic membrane security filter system capable of realizing self-cleaning. Background Art

[0002] Security filters play a key protective role in water treatment systems, but most existing security filters are filled with disposable filter elements, which require manual regular removal and cleaning of the filter element, which not only increases the cost of manual intervention, but may also cause the interruption of the continuous filtration of the security filter. Security filters with washable filter elements often require complex pipelines and automatic control programs to clean the filter element, and the control of the automatic control program is difficult. Summary of the invention

[0003] The present invention proposes a self-cleaning ceramic membrane security filtration system to solve the technical problems that the existing disposable security filter needs to regularly disassemble and clean the filter element, and the security filter with a washable filter element has great difficulty in controlling the automatic control program when cleaning the filter element.

[0004] One aspect of the present invention is to provide a self-cleaning ceramic membrane security filtration system, the ceramic membrane security filtration system comprising: a ceramic membrane security filter;

[0005] The ceramic membrane security filter comprises a bottom shell, a filter cavity and an upper cover; a bottom guide plate is installed between the bottom shell and the filter cavity, and a top guide plate is installed between the filter cavity and the upper cover;

[0006] In the filter cavity, between the bottom guide plate and the top guide plate, a plurality of internal pressure ceramic membrane tubes are installed; the internal pressure ceramic membrane tubes are connected to the bottom shell and the upper cover;

[0007] The ceramic membrane security filtration system also includes: a water inlet pipe and a water collection tank; the water inlet pipe is connected to the bottom of the bottom shell; the water collection tank is connected to the filtration chamber through a connecting pipe;

[0008] Wherein, the elevation of the water inlet end of the water inlet pipe is higher than the elevation of the top guide plate;

[0009] Wherein, the ceramic membrane security filtration system further comprises: a siphon drainage pipe, the siphon drainage pipe comprises an inclined pipe section and a vertical pipe section, the inclined pipe section is connected to the top of the upper cover, the vertical pipe section is connected to the inclined pipe section, and the vertical pipe section extends downward to the ground in a vertical direction;

[0010] A siphon breaking bucket is installed in the water collection tank, and the siphon breaking bucket is connected to the connection point of the inclined pipe section and the vertical pipe section through a siphon breaking pipe;

[0011] Wherein, the maximum water level elevation of the water collection tank is higher than the elevation of the siphon breaking bucket.

[0012] In a preferred embodiment, the maximum water level elevation of the water collection tank is higher than the elevation of the siphon breaking bucket, and the maximum water level elevation of the water collection tank is higher than the elevation of the top guide plate.

[0013] In a preferred embodiment, the maximum water level elevation of the water collection tank minus the elevation of the top guide plate is equal to 0.3m to 0.5m.

[0014] In a preferred embodiment, the elevation of the siphon breaking bucket is equal to the elevation of the top guide plate.

[0015] In a preferred embodiment, the water inlet pipe includes a horizontal pipe section, a vertical pipe section and a U-shaped pipe, the horizontal pipe section is connected to the vertical pipe section, the vertical pipe section is connected to the U-shaped pipe, and the U-shaped pipe is connected to the bottom of the bottom shell;

[0016] The center elevation of the horizontal pipe section is higher than the elevation of the top guide plate.

[0017] In a preferred embodiment, the angle between the inclined pipe section and the vertical pipe section of the siphon drainage pipe is 30° to 45°.

[0018] In a preferred embodiment, the elevation of the connection point between the inclined pipe section and the vertical pipe section minus the elevation of the top guide plate is equal to 1 m.

[0019] In a preferred embodiment, a plurality of mounting holes are distributed on the bottom guide plate and the top guide plate, and the mounting holes are used to mount the internal pressure ceramic membrane tube.

[0020] In a preferred embodiment, the filtration accuracy of the internal pressure ceramic membrane tube is 100-800 μm, and the filtration flux is 100-200 L / m 2 ·h.

[0021] In a preferred embodiment, the bottom shell is equipped with a dosing pipe, and the water collection tank is connected to the bottom shell through a backwash pipe;

[0022] The backwash pipe is provided with a backwash water pump, the water inlet pipe is provided with a first valve, and the connecting pipe is provided with a second valve.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention proposes a self-cleaning ceramic membrane security filtration system, which adopts a siphon drain pipe as a cleaning wastewater pipe, and installs a siphon breaking bucket in a water collection tank. The siphon breaking bucket is connected to the connection point of the inclined pipe section and the vertical pipe section of the siphon drain pipe through the siphon breaking pipe, and the maximum water level elevation of the water collection tank is higher than the elevation of the siphon breaking bucket. When the internal pressure type ceramic membrane tube is gradually blocked, the raw water enters the upper cover and fills the upper cover, and the siphon effect is automatically triggered. The clean water in the water collection tank enters the filter cavity to self-clean (backwash) the internal pressure type ceramic membrane tube. The cleaning wastewater generated by the self-cleaning (backwashing) is discharged through the upper cover and the siphon drain pipe. When the water level of the clean water in the water collection tank drops below the elevation of the siphon breaking bucket, the siphon effect is destroyed, the raw water in the upper cover drops back, and the raw water continues to enter the internal pressure type ceramic membrane tube through the water inlet pipe for filtration.

[0025] The present invention proposes a self-cleaning ceramic membrane security filtration system, in which the filtration and self-cleaning (backwashing) of the internal pressure ceramic membrane tube are automatically switched in a cycle, thereby realizing fully automatic filtration and self-cleaning (backwashing) of the internal pressure ceramic membrane tube, without the need for manual intervention or the need to design a complex automatic control program for pipeline control, thereby reducing the difficulty of controlling the filtration and backwashing of the internal pressure ceramic membrane tube.

[0026] The present invention proposes a self-cleaning ceramic membrane security filtration system and a ceramic membrane security filter, which use an internal pressure type ceramic membrane tube as a filter element for filtration. The ceramic membrane of the internal pressure type ceramic membrane tube has stable mechanical properties, large filtration flux, and is easy to clean. It can be used for a long time without replacement, and the cost of manual intervention can be reduced.

[0027] The present invention proposes a ceramic membrane security filtration system that realizes self-cleaning, wherein a dosing pipe is installed on the bottom shell, a water collecting tank is connected to the bottom shell through a backwashing pipe, a backwashing water pump is arranged on the backwashing pipe, a first valve is arranged on the water inlet pipe, and a second valve is arranged on the connecting pipe. When the self-cleaning (backwashing) of the internal pressure type ceramic membrane tube is too frequent due to the siphon effect, the first valve and the second valve are closed, and drugs are added into the bottom shell through the dosing pipe, and clean water in the water collecting tank is pumped into the ceramic membrane security filter through the backwashing water pump to chemically clean the internal pressure type ceramic membrane tube, thereby cleaning the stubborn pollutants that cannot be cleaned by the self-cleaning (backwashing) of the internal pressure type ceramic membrane tube, thereby improving the cleanliness of the cleaning of the internal pressure type ceramic membrane tube.

[0028] The present invention proposes a self-cleaning ceramic membrane security filtration system, which can realize automatic physical cleaning without self-control and has good filtration effect. It can be used for nanofiltration or reverse osmosis pretreatment in the field of municipal water supply, and can also be used for large-flow water filtration in industries such as municipal water supply, food and beverage, and biopharmaceuticals. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for use in the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a structural diagram of a ceramic membrane security filtration system that realizes self-cleaning according to the present invention.

[0031] Figure 2 It is a top view of the top guide plate of the present invention. DETAILED DESCRIPTION

[0032] In order to make the above and other features and advantages of the present invention more clear, the present invention is further described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explaining to those skilled in the art and are only exemplary and not restrictive.

[0033] Combination Figure 1 and Figure 2 According to an embodiment of the present invention, a ceramic membrane security filtration system for realizing self-cleaning is provided. The ceramic membrane security filtration system comprises: a water inlet pipe 1, a ceramic membrane security filter 2, a siphon drain pipe 3 and a water collection tank 5.

[0034] The ceramic membrane security filter 2 comprises a bottom shell 202, a filter chamber 201 and an upper cover 203. A bottom guide plate 205 is installed between the bottom shell 202 and the filter chamber 201, and a top guide plate 204 is installed between the filter chamber 201 and the upper cover 203.

[0035] In the filter cavity 201 , between the bottom guide plate 205 and the top guide plate 204 , a plurality of internal pressure ceramic membrane tubes 206 are installed. The internal pressure ceramic membrane tubes 206 are connected to the bottom shell 202 and the upper cover 203 .

[0036] In this embodiment, the bottom shell 202 and the filter chamber 201 are integrally formed, and the top of the filter chamber 201 is connected to the upper cover 203 via a flange. In other embodiments, the bottom shell 202 and the filter chamber 201 can also be split and connected via a flange.

[0037] According to the embodiment of the invention, the bottom guide plate 205 and the top guide plate 204 are provided with a plurality of mounting holes, and the mounting holes are used to mount the internal pressure ceramic membrane tube 206. The bottom guide plate 205 and the top guide plate 204 of the present invention have the same structure. Figure 2As shown, taking the top guide plate 204 as an example, the top guide plate 204 is distributed with a plurality of mounting holes 2041 , and a plurality of internal pressure ceramic membrane tubes 206 are installed between the bottom guide plate 205 and the top guide plate 204 through the mounting holes 2041 .

[0038] In this embodiment, the filtration accuracy of the internal pressure ceramic membrane tube 206 is 100-800 μm, and the filtration flux is 100-200 L / m 2 ·h.

[0039] According to the embodiment of the present invention, the water inlet pipe 1 is connected to the bottom of the bottom shell 202. The water collection tank 5 is connected to the filter chamber 201 through the connecting pipe 4.

[0040] Specifically, the water inlet pipe 1 includes a horizontal pipe section 101 , a vertical pipe section 102 and a U-shaped pipe 103 . The horizontal pipe section 101 is connected to the vertical pipe section 102 , the vertical pipe section 102 is connected to the U-shaped pipe 103 , and the U-shaped pipe 103 is connected to the bottom of the bottom shell 202 .

[0041] According to an embodiment of the present invention, the elevation of the water inlet end of the water inlet pipe 1 is higher than the elevation h of the top guide plate 204. 2 Specifically, the center elevation h of the horizontal pipe section 101 of the water inlet pipe 1 is 1 Higher than the elevation h of the top guide plate 204 2 .

[0042] According to an embodiment of the present invention, the siphon drain pipe 3 includes an inclined pipe section 301 and a vertical pipe section 302, the inclined pipe section 301 is connected to the top of the upper cover 203, the vertical pipe section 302 is connected to the inclined pipe section 301, and the vertical pipe section 302 extends downward to the ground along the vertical direction (the angle between the vertical pipe section 302 and the horizontal plane is 90°).

[0043] A siphon breaking bucket 501 is installed in the water collecting tank 5, and the siphon breaking bucket 501 is connected to the connection point K of the inclined pipe section 301 and the vertical pipe section 302 of the siphon drainage pipe 3 through the siphon breaking pipe 7. That is, the siphon breaking bucket 501 is connected to the highest point position of the siphon drainage pipe 3 through the siphon breaking pipe 7.

[0044] In a preferred embodiment, the elevation h of the connection point K between the inclined pipe section 301 and the vertical pipe section 302 of the siphon drainage pipe 3 is 4 Subtract the elevation h of the top deflector plate 2 The angle α between the inclined pipe section 301 and the vertical pipe section 302 of the siphon drainage pipe 3 is 30° to 45°.

[0045] According to an embodiment of the present invention, the maximum water level of the water collection tank 5 is 3 Higher than the elevation h of the siphon destroyer 501 5 The water collection tank 5 is provided with an outlet pipe 6, and the elevation of the outlet pipe 6 is equal to the maximum water level elevation h of the water collection tank 5.3 Similarly, when the clean water in the sump 5 reaches the maximum water level, it is discharged from the outlet pipe 6.

[0046] The working principle of the self-cleaning ceramic membrane security filtration system of the present invention is as follows:

[0047] The raw water enters the water inlet pipe 1, and enters the bottom shell 202 of the ceramic membrane security filter 2 through the horizontal pipe section 101, the vertical pipe section 102 and the U-shaped pipe 103 in sequence, and then enters the internal pressure ceramic membrane tube 206 through the installation hole of the bottom guide plate 205.

[0048] The material of the internal pressure ceramic membrane tube 206 is alumina or silicon carbide. After the raw water enters the internal pressure ceramic membrane tube 206, it is filtered by the internal pressure ceramic membrane tube 206. The filtered clean water flows into the filter cavity 201 from the side wall of the internal pressure ceramic membrane tube 206, and then enters the water collection tank 5 through the connecting pipe 4. When the clean water in the water collection tank 5 reaches the maximum water level, it is discharged from the outlet pipe 6 and enters the next water treatment process.

[0049] During the process of the ceramic membrane security filter 2 filtering raw water, the inner wall of the internal pressure ceramic membrane tube 206 is gradually clogged by pollutants, the filtering pressure gradually increases, and the raw water in the internal pressure ceramic membrane tube 206 gradually enters the upper cover 203 .

[0050] After the raw water enters the upper cover 203 and fills the upper cover 203, it enters the inclined pipe section 301 of the siphon drain pipe 3. When the raw water rises to the connection point K between the inclined pipe section 301 and the vertical pipe section 302 of the siphon drain pipe 3, the raw water automatically triggers the siphon effect due to the falling effect. The siphon drain pipe 3 sucks the raw water in the internal pressure ceramic membrane tube 206. The clean water in the water collection tank 5 enters the filter chamber 201 through the connecting pipe 4 to self-clean (backwash) the internal pressure ceramic membrane tube 206. The cleaning waste water generated by self-cleaning (backwashing) is discharged through the upper cover 203 and the siphon drain pipe 3.

[0051] When the water level of the clean water in the sump 5 drops to the elevation h of the siphon breaking bucket 501, 5 At the following time, air enters the connection point K (the highest point) between the inclined pipe section 301 and the vertical pipe section 302 of the siphon drainage pipe 3 through the siphon breaking bucket 501 and the siphon breaking pipe 7, destroying the siphon effect. The raw water in the upper cover 203 falls back, and the self-cleaning (backwashing) of the internal pressure ceramic membrane tube 206 is completed. The raw water continues to enter the internal pressure ceramic membrane tube 206 from the water inlet pipe 1 for filtration.

[0052] When the inner wall of the internal pressure type ceramic membrane tube 206 is gradually clogged by pollutants again, the above process is automatically repeated, and the filtering and self-cleaning (backwashing) of the internal pressure type ceramic membrane tube 206 are continuously and automatically cycled and switched.

[0053] The filtration and self-cleaning (backwashing) of the internal pressure ceramic membrane tube 206 of the present invention are continuously and automatically cycled and switched, realizing fully automatic filtration and self-cleaning (backwashing) of the internal pressure ceramic membrane tube 206. The maximum water level elevation h of the water collection tank 5 of the present invention 3 Higher than the elevation h of the siphon destroyer 501 5 , ensuring that the filtration and self-cleaning (backwashing) of the internal pressure ceramic membrane tube 206 are continuously and automatically cycled and switched.

[0054] In order to ensure that the raw water can always fill the internal pressure ceramic membrane tube 206 and improve the use efficiency of the internal pressure ceramic membrane tube 206, the elevation of the water inlet end of the water inlet pipe 1 of the present invention is higher than the elevation h of the top guide plate 204. 2 That is, the center elevation h of the horizontal pipe section 101 of the water inlet pipe 1 1 Higher than the elevation h of the top guide plate 204 2 .

[0055] In addition, since the water pressure of the water inlet pipe 1 is generally low, when the inner wall of the internal pressure ceramic membrane tube 206 is less blocked by pollutants, the water pressure of the water inlet pipe 1 is insufficient to fill the upper cover 203 with raw water, and the siphon effect cannot be triggered. 1 Higher than the elevation h of the top guide plate 204 2 , increasing the water pressure of the raw water entering the upper cover 203, so that when the inner wall of the internal pressure ceramic membrane tube 206 is less blocked by pollutants (the filtering pressure is lower), the raw water can also fill the upper cover 203, triggering the siphon effect and improving the cleaning efficiency of the internal pressure ceramic membrane tube 206.

[0056] According to an embodiment of the present invention, the maximum water level of the water collection tank 5 is 3 Higher than the elevation h of the siphon destroyer 501 5 , and the maximum water level elevation of the water collection tank 5 is h 3 Higher than the elevation h of the top guide plate 204 2 , so that during the self-cleaning (backwashing) process of the internal pressure type ceramic membrane tube 206, the clean water in the water collection tank 5 has a greater water pressure after entering the filter chamber 201 through the connecting pipe 4, thereby improving the strength of the self-cleaning (backwashing) of the internal pressure type ceramic membrane tube 206 and ensuring the cleaning effect of the internal pressure type ceramic membrane tube 206.

[0057] Furthermore, the maximum water level of the water collection tank 5 is h 3 Subtract the elevation h of the top guide plate 204 2 Equal to 0.3m~0.5m.

[0058] When the maximum water level of the water collection tank 5 is h 3 Higher than the elevation h of the siphon destroyer 501 5, and the maximum water level elevation of the water collection tank 5 is h 3 Higher than the elevation h of the top guide plate 204 2 , and the elevation h of the siphon destroyer 501 5 Higher than the elevation h of the top guide plate 204 2 Although the strength of the self-cleaning (backwashing) of the internal pressure ceramic membrane tube 206 can be improved, the water level drop in the sump 5 is small, the amount of clean water used for the self-cleaning (backwashing) of the internal pressure ceramic membrane tube 206 is small, and the self-cleaning (backwashing) effect of the internal pressure ceramic membrane tube 206 is poor.

[0059] When the maximum water level of the water collection tank 5 is h 3 Higher than the elevation h of the siphon destroyer 501 5 , and the maximum water level elevation of the water collection tank 5 is h 3 Higher than the elevation h of the top guide plate 204 2 , and the elevation h of the siphon destroyer 501 5 The height h below the top guide plate 204 2 When the water volume of the self-cleaning (backwashing) clean water of the internal pressure ceramic membrane tube 206 can be increased, the water level of the water collection tank 5 drops to a level lower than the elevation h of the top guide plate 204. 2 Afterwards, the intensity of self-cleaning (backwashing) of the internal pressure ceramic membrane tube 206 is reduced (the water pressure of clean water entering the filter chamber 201 is relatively small), resulting in waste of clean water in the water collection tank 5.

[0060] In order to balance the above two problems, the maximum water level of the water collection pool 5 of the present invention is h 3 Higher than the elevation h of the siphon destroyer 501 5 , and the maximum water level elevation of the water collection tank 5 is h 3 Higher than the elevation h of the top guide plate 204 2 , and the elevation h of the siphon destroyer 501 5 Equal to the elevation h of the top guide plate 204 2 , thereby not only improving the strength of the self-cleaning (backwashing) of the internal pressure type ceramic membrane tube 206 and the self-cleaning (backwashing) effect of the internal pressure type ceramic membrane tube 206 , but also reducing the waste of clean water in the water collection tank 5 .

[0061] According to the embodiment of the present invention, the bottom shell 202 is equipped with a dosing pipe 8, and the water collection tank 5 is connected to the bottom shell 202 through a backwash pipe 10. The backwash pipe 10 is provided with a backwash water pump 9, the water inlet pipe 1 is provided with a first valve 104, and the connecting pipe 4 is provided with a second valve 401.

[0062] When the self-cleaning (backwashing) of the internal pressure type ceramic membrane tube 206 by the siphon effect is too frequent, it indicates that there may be stubborn pollutants on the inner wall of the internal pressure type ceramic membrane tube 206, and chemical cleaning needs to be considered.

[0063] First, the first valve 104 and the second valve 401 add the chemical agent into the internal pressure type ceramic membrane tube 206 through the dosing pipe 8 and the bottom shell 202, and the chemical agent soaks the internal pressure type ceramic membrane tube 206.

[0064] When a certain soaking time is reached, the backwash water pump 9 is turned on. The backwash water pump 9 pumps the clean water in the water collection tank 5 into the internal pressure ceramic membrane tube 206 through the backwash pipe 9 and the bottom shell 202, so that the chemical cleaning wastewater after soaking with chemical agents is discharged through the upper cover 203 and the siphon drain pipe 3.

[0065] After the chemical cleaning is completed, the backwash water pump 9 is turned off, the first valve 104 and the second valve 401 are opened, and the internal pressure ceramic membrane tube 206 continues to perform filtering and self-cleaning (backwashing) in an automatic cycle.

[0066] The present invention targets stubborn pollutants blocking the inner wall of the internal pressure type ceramic diaphragm tube 206 and chemically cleans the internal pressure type ceramic diaphragm tube 206, thereby cleaning the stubborn pollutants that cannot be cleaned by self-cleaning (backwashing) of the internal pressure type ceramic diaphragm tube 206, thereby improving the cleanliness of the cleaning of the internal pressure type ceramic diaphragm tube 206.

[0067] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A self-cleaning ceramic membrane security filtration system, characterized in that: The ceramic membrane security filtration system comprises: a ceramic membrane security filter; The ceramic membrane security filter comprises a bottom shell, a filter cavity and an upper cover; a bottom guide plate is installed between the bottom shell and the filter cavity, and a top guide plate is installed between the filter cavity and the upper cover; In the filter cavity, between the bottom guide plate and the top guide plate, a plurality of internal pressure ceramic membrane tubes are installed; the internal pressure ceramic membrane tubes are connected to the bottom shell and the upper cover; The ceramic membrane security filtration system also includes: a water inlet pipe and a water collection tank; the water inlet pipe is connected to the bottom of the bottom shell; the water collection tank is connected to the filtration chamber through a connecting pipe; Wherein, the elevation of the water inlet end of the water inlet pipe is higher than the elevation of the top guide plate; Wherein, the ceramic membrane security filtration system further comprises: a siphon drainage pipe, the siphon drainage pipe comprises an inclined pipe section and a vertical pipe section, the inclined pipe section is connected to the top of the upper cover, the vertical pipe section is connected to the inclined pipe section, and the vertical pipe section extends downward to the ground in a vertical direction; A siphon breaking bucket is installed in the water collection tank, and the siphon breaking bucket is connected to the connection point of the inclined pipe section and the vertical pipe section through a siphon breaking pipe; Wherein, the maximum water level elevation of the water collection tank is higher than the elevation of the siphon breaking bucket.

2. The ceramic membrane security filtration system according to claim 1 is characterized in that: The maximum water level elevation of the water collection tank is higher than the elevation of the siphon breaking bucket, and the maximum water level elevation of the water collection tank is higher than the elevation of the top guide plate.

3. The ceramic membrane security filtration system according to claim 2 is characterized in that: The maximum water level elevation of the water collection tank minus the elevation of the top guide plate is equal to 0.3m to 0.5m.

4. The ceramic membrane security filtration system according to claim 2 is characterized in that: The elevation of the siphon breaking bucket is equal to the elevation of the top guide plate.

5. The ceramic membrane security filtration system according to claim 1, characterized in that: The water inlet pipe includes a horizontal pipe section, a vertical pipe section and a U-shaped pipe, the horizontal pipe section is connected to the vertical pipe section, the vertical pipe section is connected to the U-shaped pipe, and the U-shaped pipe is connected to the bottom of the bottom shell; The center elevation of the horizontal pipe section is higher than the elevation of the top guide plate.

6. The ceramic membrane security filtration system according to claim 1, characterized in that: The included angle between the inclined pipe section and the vertical pipe section of the siphon drainage pipe is 30° to 45°.

7. The ceramic membrane security filtration system according to claim 1, characterized in that: The elevation of the connection point between the inclined pipe section and the vertical pipe section minus the elevation of the top guide plate is equal to 1 m.

8. The ceramic membrane security filtration system according to claim 1, characterized in that: The bottom guide plate and the top guide plate are distributed with a plurality of mounting holes, and the mounting holes are used for mounting the internal pressure ceramic membrane tube.

9. The ceramic membrane security filtration system according to claim 8, characterized in that: The filtration accuracy of the internal pressure ceramic membrane tube is 100-800μm, and the filtration flux is 100-200L / m 2 ·h.

10. The ceramic membrane security filtration system according to claim 1, characterized in that: The bottom shell is equipped with a dosing pipe, and the water collection tank is connected with the bottom shell through a backwash pipe; The backwash pipe is provided with a backwash water pump, the water inlet pipe is provided with a first valve, and the connecting pipe is provided with a second valve.

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