A denitrification deep bed filter

Abstract

This utility model relates to the field of wastewater treatment technology and discloses a denitrification deep bed filter, including a filter structure. A diversion component and a water storage tank are installed at the top of the tank's interior. An inlet pipe is installed on the outer surface of the tank and on one side of the water storage tank. A drive component is installed on the outer surface of the tank and at the lower end of the inlet pipe. The cleaning component includes a rotating shaft and an external rod installed on the outer surface of the rotating shaft. The outer surface of the external rod is equipped with a carbon fiber brush. When cleaning the filter media, a motor operates, and the rotating shaft installed at one end of the connecting shaft also rotates, driving the external rod to rotate. This facilitates the rotation of the external rod within the filter media, expanding the cleaning range of the filter media. The carbon fiber brush contacts the filter media, and the rotating carbon fiber brush facilitates cleaning of the filter media, preventing impurities from adhering to the surface of the filter media and affecting the water treatment effect.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a denitrification deep bed filter. Background Technology

[0002] A denitrifying deep-bed filter is a water treatment device primarily used to remove nitrates and nitrites from water. It typically employs an anaerobic or hypoxic environment, reducing nitrates to nitrogen gas through denitrification, thereby removing pollutants from the water. These filters are commonly used in drinking water treatment, wastewater treatment, and the purification of agricultural wastewater. The filter usually consists of multiple layers of media with different particle sizes, such as sand, gravel, and activated carbon. As water flows through these media, suspended solids and particles are captured, while harmful substances are removed. In the bottom layer or specific areas of the deep-bed filter, due to the slower water flow and lower oxygen levels, an anaerobic or hypoxic environment is created. Denitrifying bacteria thrive in this environment, reducing nitrates to nitrogen gas, which is then released into the air. The denitrification process relies on these bacteria to convert nitrates in the water into nitrogen gas, effectively reducing the nitrate concentration in the water.

[0003] A multi-stage denitrification deep bed filter, such as the one disclosed in CN222556711U, includes a tank body. A middle-stage filter box is fixedly installed at the top of the tank body, and a top-stage filter box is fixedly installed at the top of the middle-stage filter box. A coarse sand layer is fixedly connected to the bottom of the top-stage filter box. The middle-stage filter box contains, from top to bottom, a fine sand layer, an activated carbon layer, a fiber filter screen, and a membrane filter layer. This multi-stage denitrification deep bed filter achieves automated cleaning of the coarse sand layer by setting a cleaning brush in the top-stage filter box, combined with a cylinder, a drive motor, and a sliding structure of a moving plate. Driven by the drive motor, the cylinder moves the moving plate back and forth along the support slide rod, effectively removing accumulated organic matter, microbial residues, dirt, and impurities from the coarse sand layer. This significantly improves the cleanliness of the pre-filtration layer and effectively prevents the filter media from caking and clogging.

[0004] The aforementioned patent proposes that, driven by a motor, the cleaning brush moves the moving plate back and forth along the support slide bar, effectively removing organic matter, microbial residues, dirt, and impurities accumulated on the coarse sand layer. However, in actual use, the moving plate has a limited depth, resulting in insufficient cleaning of the filter media and affecting the device's water treatment effect. Utility Model Content

[0005] The purpose of this invention is to provide a denitrification deep bed filter to solve the problem of insufficient cleaning of the filter media mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a denitrification deep bed filter, comprising a filter structure, the filter structure comprising a tank body and a biofilm installed at the lower end of the tank body, a diversion component and a water storage tank installed at the top of the tank body, an inlet pipe installed on the outer surface of the tank body and on one side of the water storage tank, a drive component installed on the outer surface of the tank body and at the lower end of the inlet pipe, a cleaning component installed inside the tank body and above the biofilm, a filter medium provided inside the tank body and at the top of the biofilm, and a drain pipe installed through the lower end of the outer surface of the tank body;

[0007] The cleaning component includes a rotating shaft and an external rod mounted on the outer surface of the rotating shaft. The outer surface of the external rod is provided with a carbon fiber brush.

[0008] Preferably, the driving component includes an external housing and a partition installed inside the external housing. A motor is installed on one side of the partition, and a connecting shaft is installed at the output end of the motor.

[0009] Preferably, the connecting shaft is provided in multiple sets, and gears are also installed on the outer surface of the connecting shaft, and the outer surfaces of the multiple sets of gears are connected to a toothed chain.

[0010] Preferably, a drain pipe is installed on the outer surface of the pool body above the biofilm, the inside of the drain pipe is fitted with a porous ceramic mesh, and an absorption pump is installed at one end of the drain pipe.

[0011] Preferably, the diversion component includes a horizontal pipe, which is provided in multiple sets. The outer surface of the horizontal pipe is provided with a circular hole groove and a diversion groove. An inner pipe is installed on the outer surface of the horizontal pipe outside the circular hole groove, and a nozzle is installed at the bottom end of the inner pipe.

[0012] Preferably, a diversion groove is provided on the outer surface of the horizontal tube and through one side of the circular hole groove, and a diversion pipe is installed on the outer surface of the horizontal tube and outside the diversion groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The present invention discloses a denitrification deep bed filter. After water enters the first set of horizontal pipes, it is divided through an inner pipe and a diversion pipe. The water inside the inner pipe is sprayed through a nozzle, and the water inside the diversion pipe enters the interior of the second set of horizontal pipes, which facilitates the uniform distribution of water and ensures that the water flow is evenly distributed on the filter media. The biofilm is used to fix denitrifying bacteria, improve denitrification efficiency, and thus improve the treatment effect of the filter structure.

[0015] 2. The denitrification deep bed filter disclosed in this utility model operates a motor when cleaning the filter media, and the rotating shaft installed at one end of the connecting shaft also rotates, which drives the external rod to rotate. This allows the external rod to rotate inside the filter media, expanding the cleaning range of the filter media. The carbon fiber brush comes into contact with the filter media, and the rotating carbon fiber brush facilitates the cleaning of the filter media, preventing impurities from adhering to the surface of the filter media and affecting the water treatment effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the pool body and diversion component of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the driving component of this utility model;

[0019] Figure 4 For the present utility model Figure 2 Enlarged view of point A in the middle.

[0020] In the diagram: 1. Filter structure; 11. Tank body; 111. Biofilm; 112. Sewage pipe; 113. Porous ceramic mesh; 114. Absorption pump; 115. Drainage pipe; 12. Water storage tank; 13. Diversion component; 131. Horizontal pipe; 132. Internal pipe; 133. Diversion pipe; 134. Circular groove; 135. Diversion channel; 136. Nozzle; 14. Filter media; 15. Drive component; 151. External box; 152. Baffle; 153. Motor; 154. Connecting shaft; 155. Gear; 156. Gear chain; 16. Cleaning component; 161. Rotating shaft; 162. External rod; 163. Carbon fiber brush; 17. Inlet pipe. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: Please refer to Figure 1 and Figure 2A denitrification deep bed filter includes a filter structure 1, which includes a tank body 11 and a biofilm 111 installed at the lower end of the tank body 11. A diversion component 13 and a water storage tank 12 are installed at the top of the tank body 11. An inlet pipe 17 is installed on the outer surface of the tank body 11 and on one side of the water storage tank 12. A drive component 15 is installed on the outer surface of the tank body 11 and at the lower end of the inlet pipe 17. A cleaning component 16 is installed inside the tank body 11 and above the biofilm 111. A filter medium 14 is provided inside the tank body 11 and at the top of the biofilm 111. A drain pipe 115 is installed through the lower end of the outer surface of the tank body 11.

[0023] A drain pipe 112 is installed on the outer surface of the pool body 11 and above the biofilm 111. A porous ceramic mesh 113 is installed inside the drain pipe 112. An absorption pump 114 is installed at one end of the drain pipe 112. The porous ceramic mesh 113 is made with a pore size of less than 1 mm.

[0024] The diversion component 13 includes a horizontal pipe 131, which is provided in multiple sets. The outer surface of the horizontal pipe 131 is provided with a circular hole groove 134 and a diversion groove 135. An inner pipe 132 is installed on the outer surface of the horizontal pipe 131 and outside the circular hole groove 134. A nozzle 136 is installed at the bottom end of the inner pipe 132. The inner pipe 132 is used to divert water.

[0025] A diversion groove 135 is provided on the outer surface of the horizontal pipe 131 and through one side of the circular hole groove 134. A diversion pipe 133 is installed on the outer surface of the horizontal pipe 131 and outside the diversion groove 135. The diversion pipe 133 transports water to the interior of other horizontal pipes 131.

[0026] In this embodiment: water is discharged into the interior of the water storage tank 12 through the inlet pipe 17. After the water enters the first set of horizontal pipes 131, it is divided through the inner pipe 132 and the diversion pipe 133 respectively. The water inside the inner pipe 132 is sprayed through the nozzle 136, and the water inside the diversion pipe 133 will enter the interior of the second set of horizontal pipes 131, so as to facilitate the uniform distribution of water and ensure that the water flow is evenly distributed on the filter medium 14. The biofilm 111 is used to fix denitrifying bacteria and improve denitrification efficiency, thereby improving the treatment effect of the filter structure 1. After the filter structure 1 has finished treating the water, the clean water is discharged into the interior of the tank body 11 to clean the filter medium 14. Then the absorption pump 114 is operated, and the clean water inside the tank body 11 is discharged through the porous ceramic mesh 113 and the sewage pipe 112.

[0027] Example 2: This example is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 2-4 The cleaning component 16 includes a rotating shaft 161 and an external rod 162 mounted on the outer surface of the rotating shaft 161. The outer surface of the external rod 162 is provided with a carbon fiber brush 163.

[0028] The drive component 15 includes an outer box 151 and a partition 152 installed inside the outer box 151. A motor 153 is installed on one side of the partition 152. A connecting shaft 154 is installed at the output end of the motor 153. The motor 153 is used to drive the connecting shaft 154 to rotate and at the same time provides power for the rotation of the rotating shaft 161.

[0029] The connecting shaft 154 is provided with multiple sets, and gears 155 are also installed on the outer surface of the connecting shaft 154. The outer surfaces of the multiple sets of gears 155 are connected to the toothed chain 156, and one end of the gear 155 is connected to one end of the rotating shaft 161.

[0030] In this embodiment: when cleaning the filter medium 14, the motor 153 operates, and the connecting shaft 154, which is shaft-connected to the motor 153, rotates, causing the gear 155 mounted on the outer surface of the connecting shaft 154 to rotate. The toothed chain 156 connected to the outer surface of the gear 155 drives the other sets of gears 155 to rotate, which in turn drives the other sets of connecting shafts 154 to rotate. The rotating shaft 161 mounted on one end of the connecting shaft 154 also rotates, which drives the external rod 162 to rotate, making it easier for the external rod 162 to rotate inside the filter medium 14, thus expanding the cleaning range of the filter medium 14. The carbon fiber brush 163 contacts the filter medium 14, and the rotating carbon fiber brush 163 facilitates the cleaning of the filter medium 14, preventing impurities from adhering to the surface of the filter medium 14 and affecting the water treatment effect.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A denitrifying deep bed filter comprising a filter structure (1), characterized in that: The filter structure (1) includes a tank body (11) and a biofilm (111) installed at the lower end of the tank body (11). A diversion component (13) and a water storage tank (12) are installed at the top of the tank body (11). An inlet pipe (17) is installed on the outer surface of the tank body (11) and on one side of the water storage tank (12). A drive component (15) is installed on the outer surface of the tank body (11) and at the lower end of the inlet pipe (17). A cleaning component (16) is installed inside the tank body (11) and above the biofilm (111). A filter medium (14) is provided inside the tank body (11) and at the top of the biofilm (111). A drain pipe (115) is installed through the lower end of the outer surface of the tank body (11). The cleaning component (16) includes a rotating shaft (161) and an external rod (162) mounted on the outer surface of the rotating shaft (161). The outer surface of the external rod (162) is provided with a carbon fiber brush (163).

2. A denitrifying deep bed filter according to claim 1, characterized in that: The drive component (15) includes an outer box (151) and a partition (152) installed inside the outer box (151). A motor (153) is installed on one side of the partition (152), and a connecting shaft (154) is installed at the output end of the motor (153).

3. A denitrifying deep bed filter according to claim 2, characterized in that: The connecting shaft (154) is provided with multiple sets, and gears (155) are also installed on the outer surface of the connecting shaft (154). The outer surfaces of the multiple sets of gears (155) are connected to toothed chains (156).

4. The denitrifying deep bed filter according to claim 1, characterized in that: A drain pipe (112) is installed on the outer surface of the pool body (11) and above the biofilm (111). A porous ceramic mesh (113) is installed inside the drain pipe (112), and an absorption pump (114) is installed at one end of the drain pipe (112).

5. The denitrifying deep bed filter according to claim 1, characterized in that: The diversion component (13) includes a horizontal pipe (131), which is provided in multiple sets. The outer surface of the horizontal pipe (131) is provided with a circular hole groove (134) and a diversion groove (135). An inner pipe (132) is installed on the outer surface of the horizontal pipe (131) and outside the circular hole groove (134). A nozzle (136) is installed at the bottom end of the inner pipe (132).

6. A denitrification deep bed filter according to claim 5, characterized in that: A diversion groove (135) is provided on the outer surface of the horizontal tube (131) and through one side of the circular hole groove (134). A diversion tube (133) is installed on the outer surface of the horizontal tube (131) and outside the diversion groove (135).

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