Filtering structure of heavy ion microporous membrane filter

Abstract

The utility model discloses a filtering structure of a heavy ion microporous membrane filter. The filtering structure comprises a middle cavity, an upper cavity, a lower cavity, a mounting plate, a filtering unit, a flushing liquid inlet pipe, a flushing cake cavity, a clear liquid outlet pipe, a turbid liquid return pipe, a sewage inlet pipe, a sewage circulating pipe, a backflushing liquid outlet pipe and a slag discharge pipe, the filter unit adopts a heavy ion microporous membrane tubular structure, a washing liquid inlet pipe penetrates through the middle cavity and is communicated with a washing cake cavity in the middle cavity, the washing cake cavity is provided with washing round hole walls for the filter unit to penetrate through, and each washing round hole wall is provided with a plurality of washing spray holes. By adopting the heavy ion microporous membrane tubular structure, the filtering precision is improved, and by arranging the washing round cake cavity, the washing round hole wall and the washing spray holes, the cleaning effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a filtering structure of a heavy ion microporous membrane filter. Background Art

[0002] In sewage treatment technology, traditional technologies include chemical treatment, physical sedimentation, membrane filtration, etc. Among them, membrane filtration technology has fast processing speed, high processing accuracy and simple processing steps, and is the research focus of sewage treatment technology. Heavy ion microporous membrane is a filter membrane with precisely controlled pore size and porosity. It can further improve the filtration accuracy after being applied to membrane filtration technology. Under the premise of ensuring the filtration accuracy, it is necessary to consider the clogging of the filter membrane during each filtration and the cleaning of the filter membrane after the filtration is completed.

[0003] In the prior art, the patent publication number CN215609691U, "A Filtration Structure for Precision Membrane Filters", completes the filtration, backwashing, sedimentation and slag discharge actions in sequence when in use, has high filtration accuracy, and will not cause corrosion and filter penetration of the equipment shell due to temperature increase during long-term use. The integrated control cabinet controls the opening and closing of the clear liquid reflux valve, pressure relief valve, backwash valve, slag discharge valve, liquid inlet valve and liquid inlet reflux valve through the PLC programmable controller, thereby completing the filtration, backwashing, sedimentation and slag discharge actions, with a high degree of automation and low labor intensity for staff.

[0004] The above-mentioned prior art only cleans the filter residue by backwashing, which is only effective for the blockage at the filter hole, and it is difficult to clean the filter residue attached to the filter membrane at the non-filter hole. The current flushing structure can only flush in one direction or multiple directions of a point, and cannot affect the middle part of the integrated tubular filter membrane, resulting in a flushing dead angle and poor cleaning effect. Utility Model Content

[0005] The utility model provides a filtering structure of a heavy ion microporous membrane filter, which is used to solve the problem that there is no relatively reliable filtering structure for the filter and the cleaning effect is poor in the prior art.

[0006] On the one hand, the utility model provides a filtering structure of a heavy ion microporous membrane filter, including: a middle cavity, an upper cavity, a lower cavity, a mounting plate, a filtering unit, a flushing inlet pipe, a flushing round cake cavity, a clear liquid outlet pipe, a turbid liquid reflux pipe, a sewage inlet pipe, a sewage circulation pipe, a backwash outlet pipe and a slag discharge pipe.

[0007] The middle cavity is communicated with the upper cavity and the lower cavity respectively, and the mounting plate is fixedly arranged between the middle cavity and the upper cavity.

[0008] The filter unit adopts a heavy ion microporous membrane tubular structure. The filter unit passes through the mounting hole of the mounting plate and is integrated inside the middle cavity.

[0009] The flushing liquid inlet pipe passes through the middle cavity and is connected with the flushing circular cavity inside the middle cavity. The flushing circular cavity is provided with a flushing circular hole wall for the filter unit to pass through, and each flushing circular hole wall is provided with a plurality of flushing spray holes.

[0010] The clear liquid outlet pipe and the turbid liquid return pipe are both connected to the upper cavity, and the clear liquid outlet pipe is located higher than the turbid liquid return pipe.

[0011] The sewage liquid inlet pipe is communicated with the lower cavity, and the sewage circulation pipe is communicated with the sewage liquid inlet pipe.

[0012] The backflushing liquid outlet pipe is communicated with the middle cavity.

[0013] The slag discharge pipe is communicated with the bottom of the lower cavity.

[0014] In a possible implementation, the filtration unit includes: an inner frame, a heavy ion microporous membrane layer, an outer frame, an annular top plate and a bottom plate.

[0015] The heavy ion microporous membrane layer is fixedly arranged between the inner frame and the outer frame, and the heavy ion microporous membrane layer adopts a pleated membrane structure.

[0016] The annular top plate is fixedly connected to the inner skeleton, the heavy ion microporous membrane layer, and the top of the outer skeleton. The inner diameter of the annular top plate is equal to the inner diameter of the inner skeleton, and the outer diameter of the annular top plate is greater than the outer diameter of the outer skeleton. The filtration unit is fixedly connected to the mounting plate through the annular top plate.

[0017] The bottom plate is fixedly connected to the inner frame, the heavy ion microporous membrane layer, and the bottom of the outer frame, and the outer diameter of the bottom plate is equal to the outer diameter of the outer frame.

[0018] In a possible implementation, the inner diameter of the flushing circular hole wall is greater than the outer diameter of the outer skeleton.

[0019] In a possible implementation, the number of the flushing circular hole walls is the same as the number of the filter units and the number of the mounting holes of the mounting plate.

[0020] In a possible implementation, a plurality of support seats are fixedly provided on the inner wall of the middle cavity, and the top of the support seat is in contact with the bottom edge of the flushing round cake cavity for support.

[0021] In a possible implementation, diverter plates are symmetrically arranged at positions of the flushing disc chamber close to the flushing liquid inlet pipe.

[0022] The diverter sheet is used to divert the water flow for flushing the liquid inlet pipe.

[0023] In a possible implementation, the middle cavity is further provided with a pressure sensor, and the middle cavity is further connected to a pressure relief liquid outlet pipe.

[0024] The filtering structure of a heavy ion microporous membrane filter in the utility model has the following advantages:

[0025] The filtering accuracy is improved by adopting the heavy ion microporous membrane tubular structure, and the cleaning effect is improved by arranging the flushing round cake cavity, flushing the round hole wall and flushing the spray hole.

[0026] By combining the pleated membrane structure with the integrated tubular structure, the filtration area is further increased without increasing the overall volume, thereby improving the filtration flux.

[0027] By arranging the support seat, the flushing round cake cavity is subjected to uniform force, thereby increasing the service life.

[0028] By setting a diverter plate to divert the water flow of the flushing liquid inlet pipe, the force of the water flow sprayed from the flushing spray hole of the flushing circular hole wall of the flushing circular cake cavity is relatively uniform, thereby improving the flushing effect.

[0029] By arranging a pressure sensor and a pressure relief liquid outlet pipe, pressure can be relieved through the pressure relief liquid outlet pipe when the internal pressure is too high, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A structural schematic diagram of a filtering structure of a heavy ion microporous membrane filter provided in an embodiment of the utility model;

[0032] Figure 2 A schematic diagram of the structure of a filter unit provided in an embodiment of the utility model;

[0033] Figure 3 A schematic top cross-sectional view of a flushing disc cavity and a filter unit provided in an embodiment of the utility model.

[0034] Description of reference numerals:

[0035] 11-middle cavity, 12-upper cavity, 13-lower cavity, 2-mounting plate, 3-filter unit, 41-flushing inlet pipe, 42-flushing inlet valve, 43-flushing round cake cavity, 44-support seat, 111-recoil outlet pipe, 112-recoil outlet valve, 113-pressure sensor, 114-pressure relief outlet pipe, 115-pressure relief outlet valve, 121-clear liquid outlet pipe, 122-turbid liquid reflux pipe, 123-turbid liquid reflux valve, 131-sewage inlet pipe, 132-sewage inlet valve, 133-sewage circulation pipe, 134-sewage circulation valve, 135-slag discharge pipe, 136-slag discharge valve, 31-internal skeleton, 32-heavy ion microporous membrane layer, 33-external skeleton, 34-annular top plate, 35-bottom plate, 431-flushing round hole wall, 432-diverter. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] Embodiment 1:

[0038] like Figures 1 to 3 As shown, an embodiment of the utility model provides a filtering structure of a heavy ion microporous membrane filter, including: a middle cavity 11, an upper cavity 12, a lower cavity 13, a mounting plate 2, a filtering unit 3, a flushing liquid inlet pipe 41, a flushing round cake cavity 43, a clear liquid outlet pipe 121, a turbid liquid reflux pipe 122, a sewage liquid inlet pipe 131, a sewage circulation pipe 133, a backwash liquid outlet pipe 111 and a slag discharge pipe 135.

[0039] The middle cavity 11 is communicated with the upper cavity 12 and the lower cavity 13 respectively, and the mounting plate 2 is fixedly disposed between the middle cavity 11 and the upper cavity 12 .

[0040] The filter unit 3 adopts a heavy ion microporous membrane tubular structure. The filter unit 3 passes through the mounting hole of the mounting plate 2 and is integrated inside the middle cavity 11 .

[0041] The flushing liquid inlet pipe 41 passes through the middle cavity 11 and is connected with the flushing circular cavity 43 inside the middle cavity 11. The flushing circular cavity 43 is provided with a flushing circular hole wall 431 for the filter unit 3 to pass through, and each flushing circular hole wall 431 is provided with a plurality of flushing spray holes.

[0042] The clear liquid outlet pipe 121 and the turbid liquid return pipe 122 are both connected to the upper cavity 12 , and the position of the clear liquid outlet pipe 121 is higher than that of the turbid liquid return pipe 122 .

[0043] The sewage inlet pipe 131 is in communication with the lower cavity 13 , and the sewage circulation pipe 133 is in communication with the sewage inlet pipe 131 .

[0044] The backflushing liquid outlet pipe 111 is communicated with the middle cavity 11 .

[0045] The slag discharge pipe 135 is communicated with the bottom of the lower cavity 13 .

[0046] Specifically, the turbid liquid reflux pipe 122 is provided with a turbid liquid reflux valve 123, the sewage inlet pipe 131 is provided with a sewage inlet valve 132, the sewage circulation pipe 133 is provided with a sewage circulation valve 134, the slag discharge pipe 135 is provided with a slag discharge valve 136, the backwash outlet pipe 111 is provided with a backwash outlet valve 112, and the flushing inlet pipe 41 is provided with a flushing inlet valve 42.

[0047] In this embodiment, the use process of the filtration structure of the heavy ion microporous membrane filter is as follows:

[0048] Filtration process: open the sewage inlet valve 132 and the turbid liquid reflux valve 123, and use pumping to transport the sewage from the sewage inlet pipe 131 into the lower cavity 13. After the sewage water level rises to the middle cavity 11, it enters the filter unit 3 for filtration and reaches the upper cavity 12. The filtered turbid liquid returns to the sewage pool from the turbid liquid reflux pipe 122 and is then transported from the sewage inlet pipe 131. In this process, the filter unit 3 is scaled. When the filtered liquid becomes clear liquid, the turbid liquid reflux valve 123 is closed and the clear liquid is discharged from the clear liquid outlet pipe 121.

[0049] Backwashing process: close the sewage inlet valve 132, open the sewage circulation valve 134, and the sewage will circulate between the sewage pool and the sewage circulation pipe 133. Open the backwashing outlet valve 112, and the liquid level difference between the backwashing outlet pipe 111 and the clear liquid outlet pipe 121 will cause the clear liquid to flow back through the filter unit 3 and be discharged from the backwashing outlet pipe 111, thus realizing backwashing.

[0050] Flushing process: during or after the backflushing process, the flushing liquid inlet valve 42 is opened, and the flushing liquid is pumped from the flushing liquid inlet pipe 41 into the flushing circular cavity 43, and then sprayed out from the flushing spray hole of the flushing circular hole wall 431 to flush the filter unit 3. The flushing effect is improved by setting the flushing circular cavity 43.

[0051] Sedimentation process: close the backwashing liquid outlet valve 112 and the flushing liquid inlet valve 42, open the slag discharge valve 136, and the slag is discharged from the slag discharge pipe 135. Close the slag discharge valve 136 and the sewage circulation valve 134, and then enter the filtration process again, and so on.

[0052] Embodiment 2:

[0053] Exemplarily, the filtration unit 3 includes: an inner frame 31 , a heavy ion microporous membrane layer 32 , an outer frame 33 , an annular top plate 34 and a bottom plate 35 .

[0054] The heavy ion microporous membrane layer 32 is fixedly disposed between the inner frame 31 and the outer frame 33 , and the heavy ion microporous membrane layer 32 adopts a pleated membrane structure.

[0055] The annular top plate 34 is fixedly connected to the inner skeleton 31, the heavy ion microporous membrane layer 32, and the top of the outer skeleton 33. The inner diameter of the annular top plate 34 is equal to the inner diameter of the inner skeleton 31, and the outer diameter of the annular top plate 34 is greater than the outer diameter of the outer skeleton 33. The filtration unit 3 is fixedly connected to the mounting plate 2 via the annular top plate 34.

[0056] The bottom plate 35 is fixedly connected to the bottom of the inner skeleton 31 , the heavy ion microporous membrane layer 32 , and the outer skeleton 33 , and the outer diameter of the bottom plate 35 is equal to the outer diameter of the outer skeleton 33 .

[0057] Exemplarily, the inner diameter of the flushing circular hole wall 431 is greater than the outer diameter of the outer skeleton 33 .

[0058] Specifically, in this embodiment, the filtration process, backwash process, flushing process and sedimentation process are the same as those in Example 1. The difference between Example 2 and Example 1 is that Example 2 combines the pleated membrane structure with the integrated tubular structure, which further increases the filtration area without increasing the overall volume, thereby improving the filtration flux.

[0059] Exemplarily, the number of the flushing circular hole walls 431 is the same as the number of the filter units 3 and the number of the mounting holes of the mounting plate 2 .

[0060] Embodiment 3:

[0061] Exemplarily, a plurality of support seats 44 are fixedly provided on the inner wall of the middle cavity 11 , and the top of the support seat 44 is in contact with the bottom edge of the flushing circular cavity 43 for support.

[0062] Exemplarily, the flushing circular cavity 43 is symmetrically provided with a diverter piece 432 near the flushing liquid inlet pipe 41 .

[0063] The diverter plate 432 is used to divert the water flow for flushing the liquid inlet pipe 41 .

[0064] Specifically, in this embodiment, the filtering process, backwashing process, flushing process and sedimentation process are the same as those in embodiment 1. The difference between embodiment 3 and embodiment 1 is that embodiment 3 provides a support seat 44 so that the flushing round cake cavity 43 is subjected to uniform force, thereby improving the service life. In this embodiment, three support seats 44 are provided. Embodiment 3 also provides a diverter plate 432 to divert the water flow of the flushing liquid inlet pipe 41, so that the force of the water flow sprayed from the flushing spray hole of the flushing circular hole wall 431 of the flushing round cake cavity 43 is relatively uniform, thereby improving the flushing effect. In this embodiment, two diverter plates 432 are symmetrically provided, and a gap is left between the two diverter plates 432, so that the water flow entering from the flushing liquid inlet pipe 41 is divided into three streams. The top and bottom of the diverter plate 432 are fixedly connected to the inner top and inner bottom of the flushing round cake cavity 43, respectively.

[0065] Embodiment 4:

[0066] Exemplarily, the middle cavity 11 is further provided with a pressure sensor 113 , and the middle cavity 11 is further connected to a pressure relief liquid outlet pipe 114 .

[0067] Specifically, the pressure relief liquid outlet pipe 114 is provided with a pressure relief liquid outlet valve 115 .

[0068] In this embodiment, the filtration process, backwash process, flushing process and sedimentation process are the same as those in Example 1. The difference between Example 4 and Example 1 is that Example 4 sets a pressure sensor 113 and a pressure relief liquid outlet pipe 114, so that when the internal pressure is too high, the pressure is released through the pressure relief liquid outlet pipe 114, thereby improving safety.

[0069] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0070] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A filtering structure of a heavy ion microporous membrane filter, characterized in that: include: Middle cavity, upper cavity, lower cavity, mounting plate, filter unit, flushing liquid inlet pipe, flushing round cake cavity, clear liquid outlet pipe, turbid liquid return pipe, sewage liquid inlet pipe, sewage circulation pipe, backwashing liquid outlet pipe and slag discharge pipe; The middle cavity is communicated with the upper cavity and the lower cavity respectively, and the mounting plate is fixedly arranged between the middle cavity and the upper cavity; The filter unit adopts a heavy ion microporous membrane tubular structure, and the filter unit passes through the mounting hole of the mounting plate and is integrated inside the middle cavity; The flushing liquid inlet pipe passes through the middle cavity and is connected with the flushing circular cavity inside the middle cavity. The flushing circular cavity is provided with a flushing circular hole wall for the filter unit to pass through, and each flushing circular hole wall is provided with a plurality of flushing spray holes; The clear liquid outlet pipe and the turbid liquid return pipe are both connected to the upper cavity, and the position of the clear liquid outlet pipe is higher than the turbid liquid return pipe; The sewage inlet pipe is connected to the lower cavity, and the sewage circulation pipe is connected to the sewage inlet pipe; The backwash liquid outlet pipe is connected to the middle cavity; The slag discharge pipe is communicated with the bottom of the lower cavity.

2. The filtering structure of a heavy ion microporous membrane filter according to claim 1, characterized in that: The filtration unit comprises: an inner frame, a heavy ion microporous membrane layer, an outer frame, an annular top plate and a bottom plate; The heavy ion microporous membrane layer is fixedly arranged between the inner frame and the outer frame, and the heavy ion microporous membrane layer adopts a pleated membrane structure; The annular top plate is fixedly connected to the inner frame, the heavy ion microporous membrane layer, and the top of the outer frame, the inner diameter of the annular top plate is equal to the inner diameter of the inner frame, the outer diameter of the annular top plate is greater than the outer diameter of the outer frame, and the filter unit is fixedly connected to the mounting plate through the annular top plate; The bottom plate is fixedly connected to the inner frame, the heavy ion microporous membrane layer, and the bottom of the outer frame, and the outer diameter of the bottom plate is equal to the outer diameter of the outer frame.

3. The filtering structure of a heavy ion microporous membrane filter according to claim 2, characterized in that: The inner diameter of the flushing circular hole wall is greater than the outer diameter of the outer skeleton.

4. The filtering structure of a heavy ion microporous membrane filter according to claim 1, characterized in that: The number of the flushing circular hole walls is the same as the number of the filter units and the number of the mounting holes of the mounting plate.

5. The filtering structure of a heavy ion microporous membrane filter according to claim 1, characterized in that: A plurality of support seats are fixedly arranged on the inner wall of the middle cavity, and the top of the support seat is in contact with the bottom edge of the flushing round cake cavity for support.

6. The filtering structure of a heavy ion microporous membrane filter according to claim 1, characterized in that: The flushing circular cavity is symmetrically provided with a diverter sheet at a position close to the flushing liquid inlet pipe; The diverter sheet is used to divert the water flow for flushing the liquid inlet pipe.

7. The filtering structure of a heavy ion microporous membrane filter according to claim 1, characterized in that: The middle cavity is also provided with a pressure sensor, and the middle cavity is also connected with a pressure relief liquid outlet pipe.

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