A denitrification filter with a double-layer filter material structure

Abstract

This utility model belongs to the field of denitrification filter technology, specifically a denitrification filter with a double-layer filter media structure, including a bottom plate; a lower chamber is fixedly installed on the top of the bottom plate, support frames are fixedly installed on both sides of the top of the bottom plate, and an upper chamber is fixedly installed on both sides of the top of the support frames. A water conveying mechanism is provided on the inner wall of the upper chamber, and a cleaning mechanism is provided on the top of both sides of the lower chamber; a separation mechanism is provided on the inner wall of the water storage tank; through the setting of the partition plate, through holes, first water conveying pipe and drain outlet, the partition plate can divide the space inside the upper chamber into three parts, so that the sewage and purified water can be stored separately. The opening of the through holes can allow the water inside the upper chamber to flow freely, thereby achieving the filtration effect with the help of the sand filter structure. The combined use of the first water conveying pipe and the drain outlet can discharge the water accumulated inside the upper chamber into the lower chamber for secondary filtration.

Description

Technical Field

[0001] This utility model belongs to the field of denitrification filter technology, specifically a denitrification filter with a double-layer filter media structure. Background Technology

[0002] With industrialization and urbanization, water pollution has become increasingly serious, with nitrogen pollution being a significant aspect. Nitrogenous pollutants lead to eutrophication, causing algal blooms, water quality deterioration, and a series of other environmental problems. Therefore, the requirements for nitrogen removal in wastewater treatment are becoming increasingly stringent. Denitrification filters, as highly efficient nitrogen removal equipment, have been widely used in the field of wastewater treatment.

[0003] Traditional denitrification filters often use a single, uniform filter bed, such as quartz sand or volcanic rock, as the filter media. This type of filter media has several problems during use. For example, some aged and detached biofilm may penetrate the filter bed, leading to a decrease in effluent quality. Simultaneously, biofilm that has not penetrated the filter bed accumulates in the gaps between filter media particles, easily causing localized blockages. This increases the flow velocity in other areas of the filter bed, creating short-flow channels and causing wastewater to flow out directly without sufficient metabolism by denitrifying bacteria.

[0004] To solve the problem of filter bed clogging, backwashing is necessary. However, the high-intensity backwash water flow will remove a large amount of active biological community from the surface of the filter media, causing the denitrification capacity of the filter to decrease in the short term. Moreover, if backwashing is not thorough, the pollutants remaining on the surface of the filter media will be difficult to remove, which will accelerate the aging of the filter media and reduce its service life.

[0005] Therefore, this utility model provides a denitrification filter with a double-layer filter media structure. Utility Model Content

[0006] To overcome the shortcomings of existing technologies and solve at least one of the problems mentioned in the background technology, a denitrification filter with a double-layer filter media structure is proposed.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A denitrification filter with a double-layer filter media structure, comprising a bottom plate; a lower chamber fixedly installed on the top of the bottom plate, support frames fixedly installed on both sides of the top of the bottom plate, and an upper chamber fixedly installed on both sides of the top of the support frames; a water conveying mechanism is provided on the inner wall of the upper chamber, and a cleaning mechanism is provided on the top of both sides of the lower chamber; a separation mechanism is provided on the inner wall of the water storage tank, and a filtration mechanism is provided on the inner wall of the partition plate; a screening assembly is provided on the inner wall of the lower chamber, and a circulation mechanism is provided on one side of the top of the upper chamber; the water conveying mechanism includes a partition plate, a through hole, a first water conveying pipe, and a drain outlet; the separation mechanism... Two sets of partitions are provided, and the two sets of partitions are fixedly installed on both sides of the inner wall of the upper chamber. The bottom of the surface of the partition is provided with through holes. The first water supply pipe is fixedly installed on the top of the two sets of upper chambers on the side close to each other. Several sets of drain outlets are provided, and the several sets of drain outlets are horizontally fixedly installed on both sides of the inner wall of the first water supply pipe. The partitions can divide the space inside the upper chamber into three parts, so that sewage and purified water can be stored separately. The opening of the through holes can allow water inside the upper chamber to flow freely, so that the filtration effect can be achieved by means of sand filter structure. The combined use of the first water supply pipe and the drain outlets can discharge the water accumulated inside the upper chamber into the lower chamber for secondary filtration.

[0008] Preferably, the cleaning mechanism includes a drainage hole, a water storage tank, and a discharge pipe. The drainage hole is located on both sides of the top of the lower chamber wall. Two sets of water storage tanks are provided, and the two sets of water storage tanks are fixedly installed on the top of the lower chamber near the drainage hole. The bottom of the water storage tank is fixedly installed with the discharge pipe. In this design, the drainage hole can prevent pebbles from being washed away by the water flow during backwashing and can block the pebbles inside the lower chamber. The combined use of the water storage tank and the discharge pipe can provide a temporary storage space for the water flow containing impurities, so that the separation screen can filter the water flow.

[0009] Preferably, the separation mechanism includes a separation net, a sliding plate, and a pull ring. The separation net is slidably installed on the inner wall of the water storage tank. Both sides of the separation net are fixedly installed with the sliding plate, the sliding plate is slidably installed with the water storage tank, and one side of the top of the sliding plate is fixedly installed with the pull ring. In this scheme, the combined use of the separation net, the sliding plate, and the pull ring can intercept and filter impurities in the water, so that the discharged water meets the discharge standards. At the same time, the combination of the sliding plate and the pull ring also makes it convenient for users to disassemble the separation net for cleaning.

[0010] Preferably, the filtration mechanism includes an L-shaped frame, a horizontal plate, a U-shaped frame, and a sand filter structure. The L-shaped frame is fixedly installed on both sides of the top of the inner wall of the partition plate. The horizontal plate is slidably installed on the inner wall of the partition plate through the L-shaped frame. The top of the horizontal plate is fixedly installed with the U-shaped frame, and the bottom of the horizontal plate is fixedly installed with the sand filter structure. In this scheme, the L-shaped frame can provide support for the horizontal plate. The cooperation between the horizontal plate and the U-shaped frame can facilitate quick installation and disassembly by the user. The sand filter structure can perform preliminary filtration of sewage to reduce the density of impurities in the water.

[0011] Preferably, the screening component includes a screening net and a pebble layer. Two sets of screening nets are provided, and the two sets of screening nets are fixedly installed longitudinally on the inner wall of the lower chamber. The inner wall of the screening net is provided with a pebble layer. In this scheme, the combined use of the screening net and the pebble layer can further filter the sewage. Through the gaps between the pebbles, impurities in the water can be fully filtered out.

[0012] Preferably, the circulation mechanism includes a water pump, a drain pipe, and a second water supply pipe. The water pump is fixedly installed on the top of the upper chamber away from the first water supply pipe. The input end of the water pump is threaded to the second water supply pipe, and the output end of the water pump is threaded to the drain pipe. The end of the second water supply pipe away from the water pump is threaded to the bottom of the lower chamber. In this scheme, the combined use of the water pump, drain pipe, and second water supply pipe can extract the water inside the lower chamber and discharge it back into the upper chamber for secondary filtration. At the same time, the second water supply pipe can be directly connected to the drain pipe to discharge the purified water.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The denitrification filter with a double-layer filter media structure described in this utility model, through the setting of a partition plate, through holes, a first water supply pipe and a drain outlet, allows the partition plate to divide the space inside the upper chamber into three parts, so that sewage and purified water can be stored separately. The opening of the through holes allows water inside the upper chamber to flow freely, thereby achieving the filtration effect with the help of the sand filter structure. The combined use of the first water supply pipe and the drain outlet can discharge the water accumulated inside the upper chamber into the lower chamber for secondary filtration.

[0015] 2. The denitrification filter with a double-layer filter media structure described in this utility model, through the setting of drainage holes, water storage tank and [other components], can prevent the pebbles from being washed away by the water flow during backwashing, and can block the pebbles inside the lower chamber. The water storage tank and [other components] can provide a temporary storage space for water containing impurities, so that the separation screen can filter the water flow. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a front perspective view of the present invention;

[0018] Figure 2 This is a half-sectional view of the lower chamber in this utility model;

[0019] Figure 3 This is a sectional view of the upper chamber in this utility model;

[0020] Figure 4 This is a schematic diagram of the cleaning mechanism in this utility model.

[0021] Legend:

[0022] 1. Base plate; 2. Lower chamber; 3. Support frame; 4. Upper chamber; 5. Water supply mechanism; 51. Divider plate; 52. Through hole; 53. First water supply pipe; 54. Drain outlet; 6. Cleaning mechanism; 61. Drainage through hole; 62. Water storage tank; 63. Discharge pipe; 7. Separation mechanism; 71. Separation net; 72. Slide plate; 73. Pull ring; 8. Filtration mechanism; 81. L-shaped frame; 82. Horizontal plate; 83. U-shaped frame; 84. Sand filter structure; 9. Screening assembly; 91. Isolation net; 92. Pebble layer; 10. Circulation mechanism; 101. Water pump; 102. Drain pipe; 103. Second water supply pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Specific implementation examples are given below.

[0025] like Figures 1 to 4As shown in the embodiment of this utility model, a denitrification filter with a double-layer filter media structure includes a bottom plate 1; a lower chamber 2 is fixedly installed on the top of the bottom plate 1, support frames 3 are fixedly installed on both sides of the top of the bottom plate 1, and an upper chamber 4 is fixedly installed on both sides of the top of the support frames 3. A water conveying mechanism 5 is provided on the inner wall of the upper chamber 4, and a cleaning mechanism 6 is provided on the top of both sides of the lower chamber 2; a separation mechanism 7 is provided on the inner wall of the water storage tank 62, and a filtration mechanism 8 is provided on the inner wall of the partition plate 51; a screening assembly 9 is provided on the inner wall of the lower chamber 2, and a circulation mechanism 10 is provided on one side of the top of the upper chamber 4; the water conveying mechanism 5 includes a partition plate 51, a through hole 52, and a first water conveying pipe 53. The upper chamber 4 has two sets of partition plates 51, each fixedly installed on both sides of the inner wall of the upper chamber 4. A through hole 52 is provided at the bottom of the surface of each partition plate 51. A first water supply pipe 53 is fixedly installed on the top of the two upper chambers 4 on opposite sides. Several sets of drain outlets 54 are provided, horizontally fixedly installed on both sides of the inner wall of the first water supply pipe 53. The cleaning mechanism 6 includes a drain through hole 61, a water storage tank 62, and a discharge pipe 63. The drain through hole 61 is located on both sides of the top of the inner wall of the lower chamber 2. Two sets of water storage tanks 62 are provided, fixedly installed on the top of the lower chamber 2 near the drain through hole 61. The bottom of the tank 62 is fixedly installed with the discharge pipe 63. The separation mechanism 7 includes a separation net 71, a sliding plate 72, and a pull ring 73. The separation net 71 is slidably installed on the inner wall of the water storage tank 62. Both sides of the separation net 71 are fixedly installed with the sliding plate 72. The sliding plate 72 is slidably installed with the water storage tank 62. One side of the top of the sliding plate 72 is fixedly installed with the pull ring 73. The filtration mechanism 8 includes an L-shaped frame 81, a horizontal plate 82, a U-shaped frame 83, and a sand filter structure 84. The L-shaped frame 81 is fixedly installed on both sides of the top of the inner wall of the partition plate 51. The horizontal plate 82 is slidably installed on the inner wall of the partition plate 51 through the setting of the L-shaped frame 81. The top of the horizontal plate 82 is fixedly installed with the U-shaped frame 83. The bottom is fixedly installed with the sand filter structure 84. The screening component 9 includes a separation net 91 and a pebble layer 92. Two sets of separation nets 91 are provided. The two sets of separation nets 91 are fixedly installed longitudinally on the inner wall of the lower chamber 2. The inner wall of the separation net 91 is provided with a pebble layer 92. The circulation mechanism 10 includes a water pump 101, a drain pipe 102 and a second water supply pipe 103. The water pump 101 is fixedly installed on the top of the upper chamber 4 away from the first water supply pipe 53. The input end of the water pump 101 is threadedly installed with the second water supply pipe 103. The output end of the water pump 101 is threadedly installed with the drain pipe 102. The end of the second water supply pipe 103 away from the water pump 101 is threadedly installed with the bottom of the lower chamber 2.

[0026] like Figures 1 to 4As shown, the partition plate 51 divides the space inside the upper chamber 4 into three parts, allowing the wastewater and purified water to be stored separately. The opening of the through hole 52 allows the water inside the upper chamber 4 to flow freely, thereby achieving a filtration effect with the help of the sand filter structure 84. The combined use of the first water supply pipe 53 and the drain outlet 54 allows the water accumulated inside the upper chamber 4 to be discharged into the lower chamber 2 for secondary filtration. The opening of the drain through hole 61 prevents the pebbles from being washed away by the water flow during backwashing, and can block the pebbles inside the lower chamber 2. The combined use of the water storage tank 62 and the discharge pipe 63 can provide a temporary storage space for the water containing impurities, so that the separation net 71 can filter the water. The combined use of the separation net 71, the slide plate 72 and the pull ring 73 can intercept and filter the impurities in the water, thereby... The discharge pipe 63 discharges clean water that meets the discharge standards. At the same time, the cooperation between the slide plate 72 and the pull ring 73 makes it easy for users to disassemble the separation net 71 for cleaning. The L-shaped frame 81 provides support for the horizontal plate 82. The cooperation between the horizontal plate 82 and the U-shaped frame 83 makes it easy for users to quickly install and disassemble. The sand filter structure 84 can perform a preliminary filtration of sewage to reduce the density of impurities in the water. The cooperation between the isolation net 91 and the pebble layer 92 can further filter the sewage. Through the gaps between the pebbles, impurities in the water can be fully filtered out. The cooperation between the water pump 101, the drain pipe 102 and the second water supply pipe 103 can draw water out of the lower chamber 2 and return it to the upper chamber 4 for secondary filtration. At the same time, the second water supply pipe 103 can be directly connected to the drain pipe to discharge the purified water.

[0027] Working Principle: During operation, first place the base plate 1 on a flat surface. Then, connect the input end of the water pump 101 to the sewage pipe. Start the water pump 101 to draw sewage from the sewage pipe into the upper chamber 4. The sewage then flows through the through-hole 52 and passes through three sets of sand filter structures 84 for initial filtration. The filtered water accumulates inside the upper chamber 4 until the water level rises to the height of the first water supply pipe 53. The water then flows through the first water supply pipe 53 into multiple drain outlets 54, which discharge the water into the lower chamber 2. When the sewage enters the lower chamber 2, it flows through the pebble layer 92, which filters out larger impurities on the surface of the sewage. The sewage then enters the lower layer for secondary filtration. When recirculation filtration is required, the user needs to connect the second water supply pipe 103 to the input end of the water pump 101 to re-pump the treated sewage from the bottom of the lower chamber 2 back into the upper chamber 4 for secondary circulation. When backwashing is required after filtration, simply reverse the water pump 101 to apply pressure to the lower chamber 2 through the second water pipe 103, causing the water inside to be transported upwards. When the water flows through the pebble layer 92, it will wash off the impurities attached to the surface of the pebble layer 92. Subsequently, the impurities and pebbles will float upwards due to the impact of the water flow. When the water level rises to the drain hole 61, the water will flow into the water storage tank 62 through the drain hole 61, while the pebbles will be blocked on the inner wall of the lower chamber 2. When the water containing impurities flows into the water storage tank 62, the separation screen 71 will filter out the impurities in the water, and the clean water will be discharged through the discharge pipe 63. After filtration is completed, the user needs to use hoisting machinery to remove the horizontal plate 82 through the U-shaped frame 83 and clean or replace the sand filter structure 84. At the same time, the sliding plate 72 and the separation screen 71 can be pulled out through the pull ring 73 to clean the impurities filtered by the separation screen 71, ensuring that the filter can always maintain the best condition.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A denitrifying filter of a double-layer filter material structure comprising a bottom plate (1); characterized in that: The bottom plate (1) is fixedly installed with a lower chamber (2), and the bottom plate (1) is fixedly installed with support frames (3) on both sides of the top. The support frames (3) are fixedly installed with an upper chamber (4) on both sides of the top. The inner wall of the upper chamber (4) is provided with a water conveying mechanism (5), and the top of both sides of the lower chamber (2) is provided with a cleaning mechanism (6). The water conveying mechanism (5) includes a partition plate (51), a through hole (52), a first water conveying pipe (53), and a drain outlet (54). The partition plate (51) is provided in two sets, and the two sets of partition plates (51) are fixedly installed on both sides of the inner wall of the upper chamber (4). The bottom of the surface of the partition plate (51) is provided with a through hole (52). The first water conveying pipe (53) is fixedly installed on the top of the two sets of upper chambers (4) on one side close to each other. The drain outlet (54) is provided in several sets, and the several sets of drain outlets (54) are horizontally fixedly installed on both sides of the inner wall of the first water conveying pipe (53). The cleaning mechanism (6) includes a drainage through hole (61), a water storage tank (62), and a discharge pipe (63). The drainage through hole (61) is opened on both sides of the top of the inner wall of the lower chamber (2). There are two sets of water storage tanks (62). The two sets of water storage tanks (62) are fixedly installed on the top of the lower chamber (2) near the drainage through hole (61). The bottom of the water storage tank (62) is fixedly installed with the discharge pipe (63).

2. The denitrification filter with a double-layer filter media structure according to claim 1, characterized in that: The inner wall of the water storage tank (62) is provided with a separation mechanism (7), and the inner wall of the partition plate (51) is provided with a filter mechanism (8).

3. The denitrification filter with a double-layer filter media structure according to claim 2, characterized in that: The inner wall of the lower chamber (2) is provided with a sieving assembly (9), and a circulation mechanism (10) is provided on one side of the top of the upper chamber (4).

4. The denitrification filter with a double-layer filter media structure according to claim 3, characterized in that: The separation mechanism (7) includes a separation net (71), a sliding plate (72), and a pull ring (73). The separation net (71) is slidably installed on the inner wall of the water storage tank (62). The two sides of the separation net (71) are fixedly installed with the sliding plate (72). The sliding plate (72) is slidably installed with the water storage tank (62). One side of the top of the sliding plate (72) is fixedly installed with the pull ring (73).

5. A denitrification filter with a double-layer filter media structure according to claim 4, characterized in that: The filtration mechanism (8) includes an L-shaped frame (81), a horizontal plate (82), a U-shaped frame (83), and a sand filter structure (84). The L-shaped frame (81) is fixedly installed on both sides of the top of the inner wall of the partition plate (51). The horizontal plate (82) is slidably installed on the inner wall of the partition plate (51) through the setting of the L-shaped frame (81). The top of the horizontal plate (82) is fixedly installed with the U-shaped frame (83), and the bottom of the horizontal plate (82) is fixedly installed with the sand filter structure (84).

6. A denitrification filter with a double-layer filter media structure according to claim 5, characterized in that: The screening component (9) includes a separation net (91) and a pebble layer (92). The separation net (91) is provided in two sets, and the two sets of separation nets (91) are fixedly installed longitudinally on the inner wall of the lower chamber (2). The inner wall of the separation net (91) is provided with a pebble layer (92).

7. A denitrification filter with a double-layer filter media structure according to claim 6, characterized in that: The circulation mechanism (10) includes a water pump (101), a drain pipe (102), and a second water supply pipe (103). The water pump (101) is fixedly installed on the top of the upper chamber (4) away from the first water supply pipe (53). The input end of the water pump (101) is threadedly installed with the second water supply pipe (103), and the output end of the water pump (101) is threadedly installed with the drain pipe (102). The end of the second water supply pipe (103) away from the water pump (101) is threadedly installed with the bottom of the lower chamber (2).

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