Floating ceramsite activated carbon net cage filter

Abstract

The utility model discloses a floating ceramsite activated carbon net cage filter tank, which relates to the field of feed water treatment and comprises a down-flow filter tank body, and a water distribution area, a floating ceramsite activated carbon net cage and a collection and distribution area are arranged in the down-flow filter tank body from top to bottom. Wherein the floating ceramsite activated carbon net cage is located below the water distribution area so as to pre-filter to-be-filtered water flowing into the water distribution area, the floating ceramsite activated carbon net cage comprises a net cage body, a floating ceramsite filter layer and an activated carbon filter layer, the floating ceramsite filter layer and the activated carbon filter layer are limited in the net cage body, and the floating ceramsite filter layer is located above the activated carbon filter layer; and the collecting and distributing area is positioned below the floating ceramsite activated carbon net cage. The floating ceramsite activated carbon net cage is applied to a middle-arranged carbon pool and can be modified by additionally arranging the floating ceramsite activated carbon net cage on an existing activated carbon pool, and the modification cost is low; the problems that the adsorption biochemical effect of an activated carbon filter layer is weakened due to the influence of the turbidity of water to be filtered in the middle carbon tank, the activated carbon filter material is seriously abraded due to frequent flushing of the filter tank, the adsorption capacity is quickly attenuated, and the service life is greatly shortened can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, in particular to a floating ceramic active carbon net box filter. BACKGROUND

[0002] For micro-polluted drinking water sources, the biological activated carbon water advanced treatment technology is often used at home and abroad, that is, an activated carbon tank is added after the conventional water purification process of "coagulation-sedimentation-sand filtration", forming a "coagulation-sedimentation tank-sand filter-activated carbon tank-disinfection" advanced treatment process, to further adsorb and biologically remove the micro-pollutants remaining in the conventional water purification process. The activated carbon tank is called "post-activated carbon tank", which has a certain removal capacity for organic pollutants and heavy metals since its large-scale application in China, can effectively respond to water source pollution, and is widely recognized in water quality improvement, so the post-activated carbon tank process is currently widely used in China. In order to prevent the carbon powder generated in the activated carbon tank from flowing into the clear water tank from the activated carbon tank during operation, the post-activated carbon tank is basically in a downflow mode, which is beneficial to the interception and filtration of the carbon powder in the water. The post-activated carbon tank has the advantages of directly adsorbing and biologically removing the micro-pollutants remaining in the conventional process effluent, high purification efficiency, and low turbidity of the influent (less than 1 NTU), so that the turbidity intercepted by the activated carbon tank is very small, thereby greatly prolonging the washing period and the saturation time of the activated carbon adsorption, and reducing the operation and maintenance cost.

[0003] In southern China, microorganisms are easy to breed in the activated carbon tank, and the post-activated carbon tank effluent directly enters the clear water tank, so there is a certain biological safety risk. If the activated carbon tank is adjusted to be between the coagulation-sedimentation and sand filtration units, forming a "raw water-coagulation-sedimentation tank-activated carbon tank-sand filter-disinfection" water advanced treatment process, the activated carbon tank is called "middle-activated carbon tank", which is filtered by the terminal sand filter to eliminate the biological safety risk brought by the middle-activated carbon tank. Unlike the post-activated carbon tank which enters the sand filter after filtration, the middle-activated carbon tank enters the coagulation-sedimentation tank effluent, and the turbidity is usually 1-3 NTU, which will affect the adsorption and biochemical effect of the activated carbon filter layer after entering the middle-activated carbon tank. In addition, the turbidity interception capacity of the activated carbon filter layer is close to that of the sand filter, and its washing period is also close to once a day like the sand filter. Frequent washing will seriously weaken the adsorption and biochemical effect of the activated carbon filter material, and the carbonization layer of the activated carbon filter material is severely worn, the adsorption capacity decays quickly, and the service life of the activated carbon filter material is greatly reduced, so the middle-activated carbon tank process has not been widely promoted and applied. SUMMARY

[0004] The present application aims to at least solve one of the above technical problems in the prior art to some extent. To this end, the present application provides a floating ceramic active carbon net box filter, which can solve the problems of the middle-activated carbon tank, such as the turbidity of the water to be filtered affecting the adsorption and biochemical effect of the activated carbon filter layer, the activated carbon filter material being severely worn due to frequent washing of the filter, the adsorption capacity decaying quickly, and the service life being greatly reduced.

[0005] The floating ceramic active carbon net box filter according to the embodiment of the present application comprises a down-flow filter body, a water distribution area, a floating ceramic active carbon net box and a collection area arranged in the down-flow filter body from top to bottom, wherein the down-flow filter body is provided with a water inlet pipe connected to the water distribution area, so that the water to be filtered flows into the water distribution area through the water inlet pipe during water treatment; the down-flow filter body is provided with a water outlet pipe connected to the water distribution area, so that the backwash water flows out of the water distribution area through the water outlet pipe during backwashing; the floating ceramic active carbon net box is arranged below the water distribution area, so as to perform deep treatment on the water to be filtered flowing into the water distribution area; the down-flow filter body is provided with a filter plate connected to the water distribution area and the collection area; the floating ceramic active carbon net box comprises a net box body arranged on the filter plate, a floating ceramic filter layer and an active carbon filter layer defined in the net box body, the floating ceramic filter layer is arranged above the active carbon filter layer, and the active carbon filter layer is arranged on the filter plate; the collection area is arranged below the filter plate; the down-flow filter body is provided with a water outlet pipe connected to the collection area, so that the purified water flows out of the collection area through the water outlet pipe during water treatment; the down-flow filter body is provided with a backwash water pipe connected to the collection area, so that the backwash water flows into the collection area from the backwash water pipe during backwashing; the down-flow filter body is provided with a backwash air pipe connected to the collection area, so that the compressed air flows into the collection area from the backwash air pipe during backwashing; the water inlet pipe, the water outlet pipe, the water outlet pipe, the backwash water pipe and the backwash air pipe are all provided with valves.

[0006] In optional or preferred embodiments, the down-flow filter body is provided with a collection tank connected to the collection area; the water outlet pipe is connected to the collection tank, so that the purified water flows to the water outlet pipe through the collection area and the collection tank in sequence during water treatment; the backwash water pipe is connected to the collection tank, so that the backwash water enters the collection area through the collection tank during backwashing; the backwash air pipe is connected to the collection tank, so that the compressed air enters the collection area through the collection tank during backwashing.

[0007] In optional or preferred embodiments, the collection tank is provided with a water distribution hole and an air distribution hole connected to the collection area.

[0008] In optional or preferred embodiments, the water distribution area is provided with a water distribution tank, the down-flow filter body is provided with a water distribution channel connected to the water distribution tank, and the water inlet pipe is connected to the water distribution channel. Further, the down-flow filter body is provided with a water drainage channel connected to the water distribution tank, and the water outlet pipe is connected to the water drainage channel.

[0009] In optional or preferred embodiments, the filter plate is provided with a plurality of long-handle filter heads, so as to connect the water distribution area and the collection area.

[0010] In an optional or preferred embodiment, the net cage body comprises a filter screen plate and a support frame, the support frame is fixed on the pool wall of the down-flow filter tank body and the filter plate, the filter screen plate is horizontally installed on the top of the support frame, and a closed net cage space inside the down-flow filter tank body is formed between the filter screen plate and the filter plate.

[0011] In an optional or preferred embodiment, activated carbon is laid on the filter plate to form the activated carbon filter layer; a plurality of floating ceramic particles are filled above the activated carbon filter layer and below the filter screen plate, the floating ceramic particles form the floating ceramic particle filter layer below the filter screen plate after the floating ceramic particle activated carbon net cage is filled with water, and a gap space is arranged between the floating ceramic particle filter layer and the activated carbon filter layer to serve as an expansion space of the floating ceramic particles during backwashing.

[0012] In an optional or preferred embodiment, the mesh diameter of the filter screen plate is 3-4 mm; the particle size of the floating ceramic particles is 5-8 mm, the wet immersed particle density of the floating ceramic particles is 0.85-1.00 g / cm 3 ; and the thickness of the floating ceramic particle filter layer is 0.8-1.2 m.

[0013] In an optional or preferred embodiment, the activated carbon is selected from Φ1.5 mm coal columnar carbon or 8×30 mesh coal crushed carbon, the water immersed wet particle density of the activated carbon is 1.3-1.5 g / cm 3 ; and the thickness of the activated carbon filter layer is 1.2-2.0 m.

[0014] Based on the above technical solution, the embodiments of the present application have at least the following beneficial effects:

[0015] In the above scheme, when water treatment is performed, the water inlet pipe flows water into the distribution area, and then the water is pre-filtered by the floating ceramic particle filter layer in the floating ceramic particle activated carbon net cage, which can reduce the turbidity of the water to be filtered from 1-3 NTU to below 1 NTU, the activated carbon filter layer can play its adsorption and biochemical functions in a low-turbidity environment, avoiding frequent subsequent washing to reduce the service life of the activated carbon filter layer, and the water purified by the floating ceramic particle activated carbon net cage flows out from the water outlet pipe through the collection and distribution area, and then is filtered by the subsequent sand filter tank.

[0016] In the above scheme, when backwashing treatment is performed, air-water combined backwashing is adopted, and two washing modes can be used for washing. The first mode is floating ceramic particle activated carbon synchronous washing, the air washing intensity is selected to be 12-14 L / (m 2 ·s), and the water washing intensity is selected to be 6-11 L / (m 2 ·s); the second mode is floating ceramic particle filter layer backwashing, the washing intensity is halved, and the activated carbon filter layer below does not flow and rub at this time.

[0017] The floating ceramic active carbon net cage filter tank of the embodiment of the application is applied to the middle carbon tank, can be retrofitted by adding the floating ceramic active carbon net cage to the current active carbon tank, can fully utilize the original water distribution system and air-water combined backwashing system, and has low retrofit cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] The application will be further described below in combination with the drawings and embodiments.

[0019] Figure 1 is a structural schematic view of the embodiment of the application in water treatment;

[0020] Figure 2 is a structural schematic view of the embodiment of the application in backwashing.

[0021] The drawings show that: the downflow filter tank body 11, the water inlet pipe 12, the water outlet pipe 13, the water outlet pipe 14, the backwashing water pipe 15, the backwashing air pipe 16;

[0022] The water distribution channel 21, the water distribution groove 22, the water distribution area 23, the water drainage channel 24;

[0023] The floating ceramic active carbon net cage 30, the net cage body 31, the floating ceramic filter layer 32, the active carbon filter layer 33, the filter plate 34;

[0024] The collection and distribution area 41, the collection and distribution groove 42, the water distribution hole 43, the air distribution hole 44. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the specific embodiments of the application will be described in detail below in combination with the drawings. In the following description, a large number of specific details are set forth in order to fully understand the application. However, the application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the application, so the application is not limited by the specific embodiments disclosed below.

[0026] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0027] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0028] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0031] The following refers to Figure 1 and Figure 2 The embodiment describes a floating ceramic activated carbon net cage filter tank, which comprises a downflow filter tank body 11, and a water distribution area 23, a floating ceramic activated carbon net cage 30 and a collection and distribution area 41 are arranged in the downflow filter tank body 11 from top to bottom.

[0032] As Figure 1As shown, the down-flow filter tank body 11 is provided with a water inlet pipe 12 communicating with the distribution area 23, so as to flow the water to be filtered into the distribution area 23 through the water inlet pipe 12 during water treatment. Specifically, the distribution area 23 is provided with a distribution tank 22, the down-flow filter tank body 11 is provided with a distribution channel 21 communicating with the distribution tank 22, and the water inlet pipe 12 communicates with the distribution channel 21. During water treatment, the water inlet pipe 12 delivers the water to be filtered to the distribution channel 21, and then flows to the distribution tank 22, and then overflows to the distribution area 23, so that the water to be filtered can flow more uniformly into the distribution area 23.

[0033] The down-flow filter tank body 11 is provided with a water outlet pipe 13 communicating with the distribution area 23, so as to flow the backwash wastewater out through the water outlet pipe 13 during backwashing. Specifically, the down-flow filter tank body 11 is provided with a drainage channel 24 communicating with the distribution tank 22, and the water outlet pipe 13 communicates with the drainage channel 24. During backwashing, the backwash wastewater from the floating ceramic activated carbon net box 30 uniformly overflows from the distribution area 23 into the distribution tank 22, and then enters the drainage channel 24, and is discharged from the water outlet pipe 13.

[0034] The floating ceramic activated carbon net box 30 is located below the distribution area 23, so as to perform advanced treatment on the water to be filtered flowing into the distribution area 23. The floating ceramic activated carbon net box 30 includes a net box body 31, and a floating ceramic filter layer 32 and an activated carbon filter layer 33 defined in the net box body 31. The floating ceramic filter layer 32 is located above the activated carbon filter layer 33.

[0035] Specifically, the down-flow filter tank body 11 is provided with a filter plate 34 communicating the distribution area 23 and the collection area 41, the net box body 31 is arranged on the filter plate 34, and the activated carbon filter layer 33 is arranged on the filter plate 34. The filter plate 34 is provided with a plurality of long-handle filter heads, which communicate the distribution area 23 and the collection area 41.

[0036] In this embodiment, the net box body 31 includes a filter screen plate and a support frame. The support frame is fixed to the wall of the down-flow filter tank body 11 and the filter plate 34, and the filter screen plate is horizontally arranged on the top of the support frame. Both the support frame and the filter screen plate are made of stainless steel, or other materials not prone to rust. The support frame is fixed to the wall of the down-flow filter tank body 11 and the filter plate 34 by bolts or other fasteners. The filter screen plate and the filter plate 34 form a closed net box space inside the down-flow filter tank body 11.

[0037] The filter plate 34 is provided with a plurality of activated carbons to form the activated carbon filter layer 33, which is located at the lower part of the net box space. A plurality of floating ceramics are filled above the activated carbon filter layer 33 and below the filter screen plate. After the floating ceramic activated carbon net box 30 is filled with water, the floating ceramics form the floating ceramic filter layer 32 below the filter screen plate. A gap space is arranged between the floating ceramic filter layer 32 and the activated carbon filter layer 33, which serves as an expansion space for the floating ceramics during backwashing.

[0038] The diameter of the filter screen plate in the floating ceramic active carbon net cage 30 is 3-4 mm; the particle size of the floating ceramic is 5-8 mm, the wet immersed particle density of the floating ceramic is 0.85-1.00 g / cm 3 ; the thickness of the floating ceramic filter layer 32 is 0.8-1.2 m. The active carbon is selected from Φ1.5 mm coal columnar carbon or 8×30 mesh coal broken carbon, the water immersed wet particle density of the active carbon is 1.3-1.5 g / cm 3 ; the thickness of the active carbon filter layer 33 is 1.2-2.0 m.

[0039] The collecting and distributing area 41 is located below the filter plate 34, and the downflow filter tank body 11 is provided with a collecting and distributing groove 42 communicating with the collecting and distributing area 41. The collecting and distributing groove 42 is provided with a water distribution hole 43 and an air distribution hole 44 communicating with the collecting and distributing area 41.

[0040] The downflow filter tank body 11 is provided with a water outlet pipe 14 communicating with the collecting and distributing area, specifically, the water outlet pipe 14 is connected to the collecting and distributing groove, and during water treatment, the purified water flows from the collecting and distributing area 41 to the collecting and distributing groove 42, and then flows out through the water outlet pipe 14.

[0041] The downflow filter tank body 11 is provided with a backwashing water pipe 15 communicating with the collecting and distributing area 41, specifically, the backwashing water pipe 15 is connected to the collecting and distributing groove 42, and during backwashing, the backwashing water enters the collecting and distributing groove 42 from the backwashing water pipe 15, and then enters the collecting and distributing area 41 through the water distribution hole 43. The downflow filter tank body 11 is provided with a backwashing air pipe 16 communicating with the collecting and distributing area, specifically, the backwashing air pipe 16 is connected to the collecting and distributing groove 42, and during backwashing, the compressed air enters the collecting and distributing groove 42 from the backwashing air pipe 16, and then enters the collecting and distributing area 41 through the air distribution hole 44.

[0042] In the above scheme, the water inlet pipe 12, the drain pipe 13, the water outlet pipe 14, the backwashing water pipe 15 and the backwashing air pipe 16 are all provided with valves.

[0043] During water treatment, refer to Figure 1The filtration process of the floating ceramic activated carbon net box filter is as follows: constant water level descending flow filtration is adopted, the filtered water enters the water distribution channel 21 from the water inlet pipe 12, then overflows into the water distribution area 23 from the water distribution tank 22, uniformly penetrates downwards through the floating ceramic activated carbon net box 30, is firstly filtered by the floating ceramic filter layer 32 to remove most of the turbidity substances in the filtered water, so that the turbidity of the filtered water is reduced from 1-3 NTU to below 1 NTU, and part of the ammonia nitrogen is removed by biochemical reaction. Then the water flow is adsorbed and removed by biochemical reaction by the activated carbon filter layer 33 to remove part of the micro-pollutants in the water, and is further filtered to remove turbidity. The clean water penetrates downwards through the long handle filter head in the filter plate 34 into the collection and distribution area 41, is collected by the collection tank 42, and flows out from the water outlet pipe 14. The floating ceramic activated carbon net box filter is used as a middle carbon tank, and the water outlet thereof further enters a subsequent sand filter tank for filtration to improve the biological safety of the water supply and further improve the water purification effect of the biological activated carbon advanced water purification process. It should be noted that during water treatment, the drain pipe 13, the backwashing water pipe 15 and the backwashing gas pipe 16 are closed.

[0044] It can be understood that in the embodiment, the floating ceramic filter layer 32 in the floating ceramic activated carbon net box 30 is used for pre-filtration, which can reduce the turbidity of the filtered water from 1-3 NTU to below 1 NTU, the activated carbon filter layer 33 can play its adsorption and biochemical function in a low-turbidity environment, avoiding frequent subsequent washing to reduce the service life of the activated carbon filter layer 33, in addition, the floating ceramic surface is rough, hydrophilic and easy to form nitrifying bacteria film, has strong nitrification ammonia nitrogen capacity, and strengthens the biological purification function of the filter tank.

[0045] In the embodiment, the floating ceramic is in a slightly expanded state under the filter screen plate during water treatment, has strong pollutant removal capacity for pre-filtration of the filtered water, can remove most of the turbidity substances and nitrify part of the ammonia nitrogen, and the filtration water head loss increases slowly. Under the same filtration water head control condition, the backwashing frequency of the filter tank is greatly reduced, and the washing wear degree of the activated carbon filter layer is at the same level as that of the post-positioned carbon tank. The floating ceramic activated carbon net box filter in the embodiment is applied to a middle carbon tank, most of the turbidity of the filtered water has been removed, the backwashing frequency of the subsequent sand filter tank will be greatly reduced, the backwashing period is extended from once a day to once every few days, and therefore the operation cost is generally reduced compared with the post-positioned carbon tank process.

[0046] The filter tank needs to be backwashed when the filtration water head loss reaches the set limit, and the following two backwashing modes are adopted.

[0047] With reference to Figure 2 The first mode is floating ceramic activated carbon synchronous washing, referred to as ceramic carbon washing, and the main steps are as follows: the water inlet pipe 12 is closed, the drain pipe 13 is opened, the water outlet pipe 14 is closed when the water level reaches the filter screen plate of the floating ceramic activated carbon net box 30, the backwashing gas pipe 16 is opened, and the air scouring intensity is preferably 12-14 L / (m 2• s), preferably air scouring duration is 5 min, that is, compressed air is sequentially flowed into the collecting tank 42 and the collecting area 41 through the backwashing air pipe 16, and then air backwashing is performed on the floating ceramic filter layer 32 and the activated carbon filter layer 33; then the backwashing air pipe 16 is closed and the backwashing water pipe 15 is opened, and water backwashing is performed, preferably water scouring intensity is 6-11 L / (m 2 • s), preferably water scouring duration is 8-20 min, that is, backwashing water is sequentially flowed into the collecting tank 42 and the collecting area 41 through the backwashing water pipe 15, and then water backwashing is performed on the floating ceramic filter layer 32 and the activated carbon filter layer 33; then the backwashing water pipe 15, the backwashing air pipe 16 and the drainage pipe 13 are closed, and the backwashing is ended.

[0048] With reference to Figure 2 The second is backwashing of the floating ceramic filter layer, referred to as single washing of the ceramic bed, and the main steps are as follows: the water inlet pipe 12 is closed, the drainage pipe 13 is opened, the water level is lowered to the filter screen plate of the floating ceramic activated carbon net box 30, the water outlet pipe 14 is closed, the backwashing air pipe 16 is opened, preferably air scouring intensity is 5-8 L / (m 2 • s), preferably air scouring duration is 2-3 min, then the backwashing water pipe 15 is opened, preferably water scouring intensity is 4-5 L / (m 2 • s), air-water combined backwashing is performed, preferably air-water combined backwashing duration is 8-20 min; then the backwashing water pipe 15, the backwashing air pipe 16 and the drainage pipe 13 are closed, and the backwashing is ended. Air-water combined backwashing is performed on the floating ceramic filter layer 32 through the backwashing water pipe 15 and the backwashing air pipe 16, compared with synchronous washing of the floating ceramic activated carbon, the washing intensity is halved, and the activated carbon filter layer 33 below does not flow and rub at this time.

[0049] The backwashing of the floating ceramic activated carbon net box filter tank adopts two backwashing modes of single washing of the ceramic bed and synchronous washing of the ceramic and carbon, and the preferred backwashing combination mode is two times of single washing of the ceramic bed plus one time of synchronous washing of the ceramic and carbon, and of course it can be optimized and adjusted according to actual conditions.

[0050] The opening of the above water inlet pipe 12, the drainage pipe 13, the water outlet pipe 14, the backwashing water pipe 15 and the backwashing air pipe 16 is controlled through the respective corresponding valves.

[0051] The floating ceramic activated carbon net box filter tank of the embodiment of the application is applied to a middle-activated carbon tank, can be implemented by adding the floating ceramic activated carbon net box to the current activated carbon tank for modification, can fully utilize the original water distribution system and air-water combined backwashing system, and has low modification cost.

[0052] The embodiment of the application is applied to a middle carbon pool, and can achieve the characteristics of the post carbon pool process, that is, low turbidity of the active carbon filter layer, less turbidity of the interception and filtration, high purification efficiency, long reverse flushing cycle and active carbon adsorption saturation time, and low operation and maintenance cost; meanwhile, the ammonia and nitrogen reduction biochemical function is strengthened, and the biological safety of water supply is improved by the post sand filter, so that the water purification effect of the biological active carbon advanced water purification process is further improved.

[0053] The embodiment of the application is described in detail above in combination with the drawings, but the application is not limited to the above embodiment, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the application.

Claims

1. A floating ceramic activated carbon web tank filter characterized by: The filter tank body is internally provided with a distribution area, a floating ceramic activated carbon net box and a collection area from top to bottom, wherein, The filter tank body is provided with a water inlet pipe communicating with the distribution area, so that the water to be filtered flows into the distribution area through the water inlet pipe during water treatment, and the filter tank body is provided with a water outlet pipe communicating with the distribution area, so that the backwashing wastewater flows out through the water outlet pipe during backwashing; The floating ceramic activated carbon net box is located below the distribution area to perform advanced treatment on the water to be filtered flowing into the distribution area, and the filter tank body is internally provided with a filter plate communicating the distribution area and the collection area, the floating ceramic activated carbon net box comprises a net box body arranged on the filter plate and a floating ceramic filter layer and an activated carbon filter layer defined in the net box body, the floating ceramic filter layer is located above the activated carbon filter layer, and the activated carbon filter layer is laid on the filter plate; The collection area is located below the filter plate, the filter tank body is provided with a water outlet pipe communicating with the collection area, so that the purified water flows out through the water outlet pipe during water treatment, the filter tank body is provided with a backwashing water pipe communicating with the collection area, so that the backwashing water flows into the collection area from the backwashing water pipe during backwashing, and the filter tank body is provided with a backwashing gas pipe communicating with the collection area, so that the compressed air flows into the collection area from the backwashing gas pipe during backwashing; The water inlet pipe, the water outlet pipe, the water outlet pipe, the backwashing water pipe and the backwashing gas pipe are all provided with valves.

2. The floating ceramic activated carbon web filter of claim 1 wherein: The filter tank body is provided with a collection tank communicating with the collection area, and the water outlet pipe is connected to the collection tank, so that the purified water flows to the water outlet pipe through the collection area and the collection tank in sequence during water treatment; The backwashing water pipe is connected to the collection tank, so that the backwashing water enters the collection area through the collection tank during backwashing, and the backwashing gas pipe is connected to the collection tank, so that the compressed air enters the collection area through the collection tank during backwashing.

3. The floating ceramic activated carbon web filter of claim 2 wherein: The collection tank is provided with a water distribution hole and an air distribution hole communicating with the collection area.

4. The floating ceramic activated carbon web bay filter of claim 1 wherein: The filter tank body is provided with a water distribution channel communicating with the water distribution tank, and the water inlet pipe communicates with the water distribution channel.

5. The floating ceramic activated carbon web filter of claim 4 wherein: The filter tank body is provided with a water outlet channel communicating with the water distribution tank, and the water outlet pipe communicates with the water outlet channel.

6. The floating ceramic activated carbon web filter of any one of claims 1 to 5, wherein: The filter plate is provided with a plurality of long-handle filter heads, so as to communicate the distribution area and the collection area.

7. The floating ceramic activated carbon web filter of claim 6 wherein: The net box body comprises a filter screen plate and a support frame, the support frame is fixed on the pool wall of the filter tank body and the filter plate, the filter screen plate is horizontally installed on the top of the support frame, and the filter screen plate and the filter plate form a closed net box space inside the filter tank body.

8. The floating ceramic activated carbon web filter of claim 7 wherein: The filter plate is provided with active carbon to form an active carbon filter layer; the upper part of the active carbon filter layer and the lower part of the filter screen plate are filled with a plurality of floating ceramic particles, which form a floating ceramic particle filter layer under the filter screen plate after the floating ceramic particle active carbon net box is filled with water, and a gap space is arranged between the floating ceramic particle filter layer and the active carbon filter layer to serve as an expansion space for the floating ceramic particles during backwashing.

9. The floating ceramic activated carbon web filter of claim 8, wherein: The mesh diameter of the filter screen plate is 3-4 mm; the particle size of the floating ceramic is 5-8 mm, the wet immersed particle density of the floating ceramic is 0.85-1.00 g / cm 3 ; the thickness of the floating ceramic filter layer is 0.8-1.2 m.

10. The floating ceramic activated carbon web filter of claim 8 wherein: The activated carbon is selected from Φ1.5mm coal columnar carbon or 8x30 mesh coal broken carbon, the water immersion wet particle density of the activated carbon is 1.3-1.5g / cm 3 ; the thickness of the activated carbon filter layer is 1.2-2.0m.

Images