Filter element having interlayer backwashing and regeneration function for filter layers

Abstract

The present utility model relates to the field of water purification. A filter element having an interlayer backwashing and regeneration function for filter layers, the filter element comprising a housing, wherein a water inlet is provided at the top of the housing, a water outlet is provided at the bottom of the housing, a fluorine removal module is provided in the housing, a first filter module is provided between the fluorine removal module and the water inlet, and a second filter module is provided between the fluorine removal module and the water outlet; a water injection port is provided on a front side wall of the housing, and a first sealing plug is inserted into the water injection port; a drainage port is provided on a rear side wall of the housing, and a second sealing plug is inserted into the drainage port; and the water injection port and the drainage port directly face the fluorine removal module. In the present utility model, NaOH with a concentration of 1% can be injected through the water injection port to clean the fluorine removal module.

Description

Filter element with interlayer flushing and regeneration function TECHNICAL FIELD

[0001] The utility model relates to the field of water purification, in particular to filter element. BACKGROUND

[0002] The ion exchange capacity of active alumina is good, and can be used for removing fluorine in water. Moreover, after the saturation of active alumina exchange, 1% concentration of NaOH can be used for regeneration. But the existing filter element is to seal the defluorination module containing active alumina in the shell, and the two sides of the defluorination module are shielded by other filter modules, so that the defluorination module cannot be cleaned, that is, the active alumina cannot be regenerated.

[0003] SUMMARY

[0004] The utility model discloses a kind of filter element with interlayer flushing and regeneration function, to flush the defluorination module in filter element.

[0005] Filter element with interlayer flushing and regeneration function, including shell, the top of the shell is opened with water inlet, the bottom of the shell is opened with water outlet, characterized by being equipped with defluorination module in the shell, first filter module is equipped between the defluorination module and the water inlet, second filter module is equipped between the defluorination module and the water outlet;

[0006] Water inlet is opened on the front side wall of the shell, first sealing plug is inserted in the water inlet;

[0007] Drainage hole is opened on the rear side wall of the shell, second sealing plug is inserted in the drainage hole;

[0008] The water inlet and the drainage hole are opposite to the defluorination module.

[0009] Preferably, the shell is provided with a guide plate, the outer side wall of the guide plate abuts against the inner side wall of the shell, the inner side wall of the guide plate is provided with two protrusions, namely a first protrusion located above and a second protrusion located below, and the defluorination module is located between the first protrusion and the second protrusion; the guide plate is provided with an opening hole at a position corresponding to the water inlet.

[0010] Preferably, the upper side of the first protrusion is a downwardly inclined plane, and the lower side is an upwardly convex curved surface.

[0011] The lower side of the second protrusion is a plane, and the upper side is a downwardly convex curved surface.

[0012] Preferably, the guide plate is arc-shaped, the inner side wall of the shell is provided with a limiting strip, and the two sides of the guide plate abut against the two limiting strips respectively.

[0013] Preferably, the guide plate, the first protrusion and the second protrusion are annular, and the guide plate is provided with an opening corresponding to the position of the drain port.

[0014] Preferably, a first filter screen is arranged at the drain port.

[0015] Preferably, a second filter screen is arranged above the first protrusion, and the first filter module presses the second filter screen on the first protrusion.

[0016] Beneficial effects: The water injection port and the drain port are arranged on the side wall opposite to the defluorination module, so that the first filter module and the second filter module on the two sides of the defluorination module are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a structural sectional view of the utility model. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific drawings.

[0019] Referring to Fig. 1, the filter core with the filter layer interlayer flushing and regeneration function comprises an outer shell, the top of the outer shell is provided with a water inlet, and the bottom of the outer shell is provided with a water outlet. The outer shell is provided with a defluorination module, a first filter module 1 and a second filter module 7. The first filter module 1 is located between the defluorination module and the water inlet. The second filter module 7 is located between the defluorination module and the water outlet.

[0020] The front side wall of the outer shell is provided with a water injection port, and the water injection port is inserted with a first sealing plug 4. The rear side wall of the outer shell is provided with a drain port, and the drain port is inserted with a second sealing plug 8. The water injection port and the drain port are opposite to the defluorination module. When cleaning, first, the filter core is taken off from the water purifier, and the filter core is tilted so that the water injection port is upward and the drain port is downward. Then, 1% concentration NaOH is injected into the water injection port, and the filter core is shaken to clean the defluorination module and regenerate the active alumina in the defluorination module. Then, the second sealing plug 8 is pulled out, and the cleaning liquid is discharged through the drain port. Then, distilled water is injected into the water injection port, the filter core is shaken, and the excess cleaning liquid is washed away. Finally, the first sealing plug 4 is inserted to seal the water injection port, and the second sealing plug 8 is inserted to seal the drain port.

[0021] The inner side wall of the guide plate 5 is provided with two protrusions, namely the first protrusion 3 located at the upper side and the second protrusion 6 located at the lower side, and the fluoride removal module is located between the first protrusion 3 and the second protrusion 6. The annular protrusion has the following beneficial effects: 1. limiting the positions of the first filter module 1, the second filter module 7 and the fluoride removal module; 2. guiding the flow direction of the 1% concentration NaOH, and reducing the cleaning liquid entering the first filter module 1 and the second filter module 7; and 3. providing support for the first filter module 1. Preferably, the upper side of the first protrusion 3 is a downwardly inclined plane, so as to interfere with the downwardly inclined plane to drain the moisture in the first filter module 1 and reduce the impurities from being attached at the position. The lower side is a curved surface protruding upward. The lower side of the second protrusion 6 is a plane, and the upper side is a curved surface protruding downward. Thus, the curved surface changes the direction of the cleaning liquid. Compared with the structure of directly providing an annular protrusion on the shell, on the one hand, the structure can be adapted to the existing shell, and on the other hand, the cost can be reduced.

[0022] The guide plate 5 can be in a circular ring shape or an arc shape. The outer side wall of the guide plate 5 abuts against the inner side wall of the shell. The guide plate 5 is provided with an opening at a position corresponding to the water injection port. Thus, the opening allows the water to enter the guide plate 5, and at the same time, the opening increases the depth of the water injection port.

[0023] When the guide plate 5 is an arc-shaped plate, the first protrusion and the second protrusion are arc-shaped. The inner side wall of the shell is provided with limiting strips, and the two sides of the guide plate 5 abut against the two limiting strips respectively, so as to limit the position of the guide plate 5 by the limiting strips. The first filter screen is arranged at the water outlet, so as to prevent the active alumina balls 9 in the fluoride removal module from flowing out of the water outlet. Preferably, the first filter screen is arc-shaped, and the two sides of the first filter screen abut against a limiting strip respectively. Thus, the position of the first filter screen is limited by the limiting strips.

[0024] When the guide plate 5 is a circular ring shape, the first protrusion and the second protrusion are circular ring-shaped. The guide plate 5 is provided with an opening at a position corresponding to the water outlet. The first filter screen is fixed on the opening. Alternatively, the first filter screen is pressed between the guide plate 5 and the shell. Thus, the first filter screen prevents the active alumina balls 9 in the fluoride removal module from flowing out of the water outlet.

[0025] Alternatively, the upper side of the first protrusion 3 is provided with a second filter screen 2, and the first filter module 1 presses the second filter screen 2 on the first protrusion 3. Thus, the second filter screen 2 supports the first filter module 1, and allows the active alumina balls 9 between the first filter module 1 and the second filter module 7 to be not completely filled. Preferably, the active alumina balls 9 are filled by 70%-90% in the present application. Thus, when the active alumina balls 9 are washed, the active alumina balls 9 can move in the space between the first filter module 1 and the second filter module 7, so as to be washed more thoroughly.

[0026] The first filtering module is preferably PP cotton, and the second filtering module is preferably an ultrafiltration membrane.

[0027] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A filter element with the function of washing and regenerating the filter layer, comprising a shell, a water inlet is opened on the top of the shell, and a water outlet is opened on the bottom of the shell, characterized in that, The shell is internally provided with a defluorination module, a first filter module is arranged between the defluorination module and the water inlet, and a second filter module is arranged between the defluorination module and the water outlet. A water injection port is formed on the front side wall of the shell, and a first sealing plug is inserted into the water injection port; A water discharge port is formed on the rear side wall of the shell, and a second sealing plug is inserted into the water discharge port; The water injection port and the water discharge port are opposite to the defluorination module.

2. The filter cartridge having a filter layer interlayer flush regeneration function according to claim 1, characterized in that, The shell is internally provided with a guide plate, the outer side wall of the guide plate abuts against the inner side wall of the shell, two protrusions are arranged on the inner side wall of the guide plate, namely a first protrusion located above and a second protrusion located below, and the defluorination module is located between the first protrusion and the second protrusion; the guide plate is provided with an opening hole at a position corresponding to the water injection port.

3. The filter cartridge having a filter layer interlayer flush regeneration function according to claim 2, characterized in that, The upper side of the first protrusion is a downwardly inclined plane, and the lower side is an upwardly convex curved surface; The lower side of the second protrusion is a plane, and the upper side is a downwardly convex curved surface.

4. The filter cartridge having a filter layer interlayer flush regeneration function according to claim 2, characterized in that, The guide plate is arc-shaped, and the inner side wall of the shell is provided with limiting strips, and the two sides of the guide plate abut against the two limiting strips respectively.

5. The filter cartridge having a filter layer interlayer flush regeneration function according to claim 2, characterized in that, The guide plate, the first protrusion and the second protrusion are annular, and the guide plate is provided with an opening hole at a position corresponding to the water discharge port.

6. The filter cartridge having a filter layer interlayer flush regeneration function according to claim 1, characterized in that, The water discharge port is provided with a first filter screen.

7. The filter cartridge having a function of regenerating a filter layer by interlayer backwashing according to claim 1, characterized in that, The upper side of the first protrusion is provided with a second filter screen, and the first filter module presses the second filter screen against the first protrusion.

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