Biological filter

Abstract

The utility model discloses a biological filter which comprises a shell, a feeding hole is formed in one side of the shell, a pretreatment cavity is formed in one side of the feeding hole, a spraying pipe is arranged above the inner wall of the pretreatment cavity, a plurality of groups of atomizing nozzles are arranged below the spraying pipe, and the atomizing nozzles are arranged in the shell. Each group of atomizing nozzles are uniformly distributed in the horizontal direction of the spraying pipe, a conveying pipe is arranged on one side of the pretreatment cavity, a filler layer is arranged on the other side of the conveying pipe, porous filler is arranged in the filler layer, a heating rod is arranged in the center of the interior of the porous filler, and the heating rod is connected with the spraying pipe. The layered design is adopted, the top is provided with the advanced oxidation pretreatment unit, the middle is provided with the modular filler layer, and the bottom is provided with the supporting and collecting system, so that the overall treatment efficiency is remarkably improved, the modular design reduces the occupied area of equipment, and meanwhile, the installation and maintenance work is simplified.

Description

Technical Field

[0001] The utility model relates to the field of biological filter tanks, and more specifically, the utility model relates to a biological filter tank. Background Art

[0002] Biofilters treat malodorous gases and organic pollutants by utilizing the metabolism of microorganisms, but they have the problems of large floor space, frequent packing replacement, complex operation and control, and low efficiency in treating hydrophobic and difficult-to-degrade substances.

[0003] After searching, the existing patent (publication number: CN220766693U) discloses a biological filter, including a tank body with a bottom wall and side walls distributed around the periphery of the bottom wall, a packing layer is arranged in the tank body, a backwash pipe and an aeration pipe are arranged therein, and a partition plate extending in the vertical direction is also arranged in the tank body, the partition plate divides the tank body into a first unit tank, a second unit tank and a water distribution buffer zone connecting the first unit tank and the second unit tank, and the backwash pipe is arranged in the water distribution buffer zone. By regularly switching the inlet and outlet water directions of the filter tank, the filter material is disturbed, the blockage is reduced, the backwashing frequency is reduced, and the denitrification efficiency of denitrifying microorganisms is avoided from being reduced due to frequent backwashing and a large amount of oxygen being brought in, and energy consumption can be reduced at the same time. The setting of the partition plate makes the water flow in the filter tank run in a "U" shape, which prolongs the flow path of the sewage in the filter tank, increases the water flow residence time, and can improve the denitrification efficiency. In the process of realizing the utility model, the inventor found that the prior art has the following problems:

[0004] The existing biofilters occupy a large area, which makes installation and maintenance more troublesome. At the same time, it is also difficult to handle hydrophobic and biodegradable substances, and problems are prone to occur after a period of operation.

[0005] Therefore, a biological filter is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above defects of the prior art, the utility model provides a biological filter to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a biological filter, comprising an outer shell, a feed port is provided on one side of the outer shell, a pretreatment chamber is provided on one side of the feed port, a spray pipe is provided above the inner wall of the pretreatment chamber, an atomizing nozzle is provided below the spray pipe, a plurality of groups of atomizing nozzles are provided, and each group of atomizing nozzles is evenly arranged along the horizontal direction of the spray pipe, a delivery pipe is provided on one side of the pretreatment chamber, a packing layer is provided on the other side of the delivery pipe, a porous packing is provided inside the packing layer, a heating rod is provided at the inner center of the porous packing, a temperature sensor is provided above the heating rod, a collecting pipe is provided below the packing layer, a No. 1 water pump is provided on one side of the collecting pipe, and a discharge port is provided on one side of the No. 1 water pump.

[0008] Preferably, the inner wall of the pretreatment chamber is provided with an anti-corrosion layer, and the anti-corrosion layer is formed by brushing the pretreatment chamber with a resin anti-corrosion material.

[0009] Preferably, a connecting pipe is provided on one side of the spray pipe, a No. 2 water pump is provided on one side of the connecting pipe, and an oxidant tank is provided on one side of the No. 2 water pump.

[0010] Preferably, the atomizing nozzle evenly sprays the oxidant in the oxidant box into the pretreatment chamber, thereby performing preliminary oxidation and decomposition on the pollutants entering from the feed inlet.

[0011] Preferably, microorganisms exist inside the porous filler, and the porous filler is heated to 16-30 degrees by the heating rod.

[0012] Preferably, the model of the temperature sensor is PT100, and the temperature of the porous filler is monitored in real time by the temperature sensor.

[0013] Technical effects and advantages of the utility model:

[0014] Compared with the existing technology, this biological filter adopts a layered design, with an advanced oxidation pretreatment unit on the top, a modular packing layer in the middle, and a support and collection system at the bottom. The malodorous gas and liquid first undergo preliminary oxidation decomposition in the advanced oxidation pretreatment unit. The advanced oxidation pretreatment effectively breaks down hydrophobic and difficult-to-degrade organic matter, making it easier for microorganisms to utilize it. At the same time, the combined system realizes the synergy of physical and chemical treatment and biological treatment, significantly improving the overall treatment efficiency. The modular design reduces the equipment footprint and simplifies installation and maintenance.

[0015] Compared with the prior art, this biofilter heats the porous filler by setting a heating rod in the porous filler. Heating the porous filler can provide optimal conditions for the enzymatic reaction in the microorganisms, maximize the enzyme activity, and thereby improve the degradation efficiency of organic pollutants by microorganisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the spray pipe and the atomizing nozzle of the utility model.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the porous filler and the heating rod of the utility model.

[0019] The accompanying drawings are marked as follows: 1. outer shell; 2. feed port; 3. pretreatment chamber; 4. spray pipe; 5. atomizing nozzle; 6. delivery pipe; 7. packing layer; 8. porous packing; 9. heating rod; 10. temperature sensor; 11. collecting pipe; 12. water pump No. 1; 13. discharge port; 14. anti-corrosion layer; 15. connecting pipe; 16. water pump No. 2; 17. oxidant tank. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0021] As attached Figures 1 to 3 A biological filter tank shown includes an outer shell 1, which is made of metal material and plays a supporting and protective role and should have good sealing performance. A feed port 2 is arranged on one side of the outer shell 1. The pipe used by the feed port 2 should be made of a material with strong corrosion resistance and smooth inner wall, such as stainless steel, to prevent residual accumulation of odorous gas and liquid at the feed port 2 and reduce the service life of the device. A pretreatment chamber 3 is arranged on one side of the feed port 2. The pretreatment chamber 3 uses corrosion-resistant and high-strength materials (such as stainless steel or special plastics) to resist the erosion of oxidants. A spray pipe 4 is arranged above the inner wall of the pretreatment chamber 3, and an atomizing nozzle 5 is arranged below the spray pipe 4. The atomizing nozzle 5 is provided with several groups, and each group of atomizing nozzles 5 is evenly arranged along the horizontal direction of the spray pipe 4. The atomizing nozzle 5 is selected from corrosion-resistant materials suitable for chemical agents, such as stainless steel or special alloy materials, and the internal structure should be selected to avoid agent residue and crystallization to prevent nozzle clogging.

[0022] A delivery pipe 6 is arranged on one side of the pretreatment chamber 3. The delivery pipe 6 is made of stainless steel or special alloy to ensure that it will not be corroded during the delivery process and to prevent residue from forming on the inner wall. A packing layer 7 is arranged on the other side of the delivery pipe 6. A porous packing 8 is arranged inside the packing layer 7. The porous packing 8 is made of porous γ-Al2O3 material, porous zirconium dioxide nanomaterial, etc. These materials have a large specific surface area and a unique pore structure, which can enhance their adsorption performance. The roughness of the surface of the porous packing 8 is one of the main factors affecting the formation of the initial biofilm of microorganisms on its surface. The rougher the surface, the more likely the microorganisms are to adhere to the porous packing 8. It is easy to attach and grow because the rough surface can provide protection and reduce the scouring of microorganisms by hydraulic shear. A heating rod 9 is arranged at the inner center of the porous filler 8, and a temperature sensor 10 is arranged above the heating rod 9. The heating rod 9 can be evenly arranged inside the porous filler 8 to ensure that the temperature of the entire filler layer rises evenly, so as to avoid local overheating or insufficient temperature. A collecting pipe 11 is arranged under the filler layer 7, and a No. 1 water pump 12 is arranged on one side of the collecting pipe 11. The treated gas and liquid are discharged through the No. 1 water pump 12, and a discharge port 13 is arranged on one side of the No. 1 water pump 12. Example 2

[0023] Based on Example 1, the solution in Example 1 is further detailed in combination with the following specific working methods. Figures 1 to 3 As shown, see the following description for details:

[0024] As a preferred embodiment, the inner wall of the pretreatment chamber 3 is provided with an anti-corrosion layer 14, which is formed by brushing the pretreatment chamber 3 with a resin anti-corrosion material. Furthermore, the resin anti-corrosion material needs to be prepared in a certain proportion and evenly coated on the inner wall by brushing, rolling or spraying. During the construction process, the coating thickness and curing time need to be well controlled so that the pretreatment chamber 3 has good corrosion resistance.

[0025] As a preferred embodiment, a connecting pipe 15 is provided on one side of the spray pipe 4, a No. 2 water pump 16 is provided on one side of the connecting pipe 15, and an oxidant tank 17 is provided on one side of the No. 2 water pump 16. Furthermore, the oxidant tank 17 is equipped with hydrogen peroxide (H2O2), a colorless and transparent liquid with strong oxidizing properties, which can be decomposed into water and oxygen at room temperature and is harmless to the environment.

[0026] As a preferred embodiment, the atomizing nozzle 5 evenly sprays the oxidant in the oxidant box 17 into the pretreatment chamber 3, thereby performing preliminary oxidation and decomposition of the pollutants entering from the feed inlet 2. Furthermore, this method effectively breaks down hydrophobic and difficult-to-degrade organic matter, making it easier for microorganisms to utilize.

[0027] As a preferred embodiment, microorganisms exist inside the porous filler 8, and the porous filler 8 is heated to 16-30 degrees by the heating rod 9. Furthermore, within this temperature range, the metabolic rate of the microorganisms and the COD (chemical oxygen demand) removal rate are both high.

[0028] As a preferred embodiment, the model of the temperature sensor 10 is PT100, and the temperature of the porous filler 8 is monitored in real time by the temperature sensor 10 .

[0029] The working process of the utility model is as follows: first, the malodorous gas and liquid are discharged into the pretreatment chamber 3 through the feed port 2, and the oxidant is evenly sprayed on the malodorous gas and liquid through the atomizing nozzle 5 installed under the spray pipe 4. These oxidants can react with organic pollutants in the water to decompose them into small molecules or completely mineralize them. At the same time, the filler is heated to a temperature suitable for the growth and reproduction of microorganisms (usually 16-30°C) through the heating rod 9 installed in the porous filler 8. The temperature sensor 10 monitors the temperature of the porous filler 8 in real time, and adjusts the power of the heating rod 9 through the intelligent control system to ensure that the temperature is always maintained in the optimal range. Then, the malodorous gas and liquid cleaned by the oxidant are transported to the filler layer 7, filtered under the action of the microorganisms on the porous filler 8 and then discharged. The above is the working principle of this biological filter.

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A biofilter, comprising a housing (1), characterized in that: A feed port (2) is provided on one side of the shell (1), a pretreatment chamber (3) is provided on one side of the feed port (2), a spray pipe (4) is provided above the inner wall of the pretreatment chamber (3), an atomizing nozzle (5) is provided below the spray pipe (4), a plurality of groups of atomizing nozzles (5) are provided, and each group of atomizing nozzles (5) is evenly arranged along the horizontal direction of the spray pipe (4), a delivery pipe (6) is provided on one side of the pretreatment chamber (3), a packing layer (7) is provided on the other side of the delivery pipe (6), a porous packing (8) is provided inside the packing layer (7), a heating rod (9) is provided at the center of the porous packing (8), a temperature sensor (10) is provided above the heating rod (9), a collecting pipe (11) is provided below the packing layer (7), a first water pump (12) is provided on one side of the collecting pipe (11), and a discharge port (13) is provided on one side of the first water pump (12).

2. A biofilter according to claim 1, characterized in that: The inner wall of the pretreatment chamber (3) is provided with an anti-corrosion layer (14), and the anti-corrosion layer (14) is formed by brushing the pretreatment chamber (3) with a resin-based anti-corrosion material.

3. A biofilter according to claim 1, characterized in that: A connecting pipe (15) is provided on one side of the spray pipe (4), a second water pump (16) is provided on one side of the connecting pipe (15), and an oxidant tank (17) is provided on one side of the second water pump (16).

4. A biofilter according to claim 3, characterized in that: The atomizing nozzle (5) evenly sprays the oxidant in the oxidant box (17) into the pretreatment chamber (3), thereby performing preliminary oxidation and decomposition on the pollutants entering through the feed inlet (2).

5. A biofilter according to claim 1, characterized in that: Microorganisms exist inside the porous filler (8), and the porous filler (8) is heated to 16-30 degrees by the heating rod (9).

6. A biofilter according to claim 1, characterized in that: The model of the temperature sensor (10) is PT100, and the temperature of the porous filler (8) is monitored in real time through the temperature sensor (10).

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