Multipurpose biological filter treatment device

Abstract

The invention discloses a multipurpose biological filter treatment device, which mainly comprises a water distribution tank, a water inlet pipe, a water outlet pipe, a return pipe, an aeration pipe, a filter material, a filter plate, a baffle plate, a membrane assembly, an overflow port and a tank body, and is characterized in that the baffle plate is arranged in the middle of the tank body to divide the tank body into a filler area and a reaction area; the filter plate is arranged at the bottom of the filler area, two layers of fillers are arranged on the upper layer of the filter plate, the lower layer of the filter plate is quartz sand with the particle size of 0.5-2mm, and the upper layer of the filter plate is an AFM active filter material; and the membrane component is arranged in the reaction area and adopts a silicon carbide flat membrane with the filtering precision of 0.1-2 microns. Aiming at the defects of an original sewage treatment device, the invention provides a sewage treatment filter device which is good in treatment effect and low in operation energy consumption, can be used for water pretreatment of a micro-polluted water source and can also be used for advanced treatment of sewage.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, and in particular to a biological filter treatment device with good sewage treatment effect and low operating energy consumption. Background Art

[0002] The sewage treatment industry collects and treats sewage, effectively removes harmful substances from it, reduces its degree of pollution to the environment, and protects the sustainable use of water resources.

[0003] Aerated biological filter is a new type of biological treatment technology that is developing rapidly. It has the advantages of high effluent quality, low investment, flexible and convenient operation, easy management, strong impact load resistance, etc. It can be used not only for secondary and tertiary treatment of sewage, but also for pretreatment of slightly polluted water sources, etc. Aerated biological filter technology combines sewage biological treatment with deep filtration, fully reflecting the trend of modern water treatment technology towards composite and integrated development.

[0004] However, biological filters occupy a large area and are not suitable for treating large amounts of sewage. After improvements, the hydraulic load of some high-load biological filters has greatly increased, and the filter material has also increased. The increased scouring force on the filter material accelerates the shedding of the biofilm and reduces the clogging of the filter, but the sludge output of sewage treatment has also increased. Some use tower biological filters with small diameters, large heights, tower shapes, and small footprints, but the contact residence time between wastewater and filter material is short, and the degradation efficiency is not high. Researching and developing new technologies for the transformation of traditional processes, a filter device with good treatment effects, high efficiency, and low energy consumption, is a major task in the current field of sewage treatment. Summary of the invention

[0005] The purpose of the present invention is to provide a sewage treatment filter device with good treatment effect and low operating energy consumption in view of the shortcomings of the original sewage treatment device, which can be used for pretreatment of slightly polluted water source water and deep treatment of sewage.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a multi-purpose biological filter treatment device is mainly composed of a water distribution tank, a water inlet pipe, a water outlet pipe, a return pipe, an aeration pipe, filter material, a filter plate, a baffle, a membrane assembly, an overflow port and a tank body, characterized in that: the baffle is arranged in the middle of the tank body, dividing the tank body into a filling area and a reaction area; the water distribution tank is arranged above the tank body, connected to the water inlet pipe, and the water inlet pipe is arranged at the bottom of the filling area; the aeration pipe is arranged at the bottom of the tank body, and the aeration pipe is connected to the blower; the membrane assembly is connected to the self-priming pump outside the tank body through the water outlet pipe, and the membrane assembly is connected to the blower through the air washing pipe, and valves are provided on the pipes; the return pipe is arranged below the reaction zone, connected to the return pump outside the tank body, and then connected to the filling area through a pipe.

[0007] The filter plate is arranged at the bottom of the packing area, and two layers of packing are arranged on the upper layer, the lower layer is quartz sand with a particle size of 0.5-2mm, and the upper layer is AFM active filter material.

[0008] The membrane assembly is arranged in the reaction zone and adopts a silicon carbide flat membrane with a filtration accuracy of 0.1 μm to 2 μm.

[0009] The beneficial effects of the present invention are as follows: the AFM active filter material used has a low density, a higher specific surface area, high filtering accuracy, is not easy to harden and has a long service life, and the AFM is negatively charged, which makes the impurities automatically adhere to the AFM surface through charge attraction, thereby achieving the purpose of filtering impurities; the silicon carbide flat membrane component used has the characteristics of large gaps and low operating pressure, which can reduce the energy consumption of the overall equipment and is easy to clean. The device of the present invention can be used as a pretreatment for slightly polluted water sources and can also be used for deep treatment of sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 The present invention is a flowchart and a schematic diagram of a structure of an embodiment of the present invention.

[0011] In the figure: 1 water distribution tank 2 water inlet pipe 3 water outlet pipe 4 return pipe 5 aeration pipe 6 filter material 7 filter plate 8 baffle 9 membrane assembly 10 overflow port 11 tank body 12 electric valve 13 blower 14 self-priming pump 15 air washing pipeline 16 return pump. DETAILED DESCRIPTION

[0012] The following is combined with Figure 1 The specific implementation modes of the present invention are further described.

[0013] A multi-purpose biological filter treatment device mainly consists of a water distribution tank 1, a water inlet pipe 2, a water outlet pipe 3, a return pipe 4, an aeration pipe 5, filter material 6, a filter plate 7, a baffle 8, a membrane assembly 9, an overflow port 10 and a tank body 11, characterized in that: the baffle 8 is arranged in the middle of the tank body 11, and the tank body 11 is divided into a filling area and a reaction area; the water distribution tank 1 is arranged above the tank body 11, connected to the water inlet pipe 2, and the water inlet pipe 2 is arranged at the bottom of the filling area; the aeration pipe 5 is arranged at the bottom of the tank body and connected to a blower 13 outside the tank body 11; the membrane assembly 9 is connected to a self-priming pump 14 outside the tank body 11 through the water outlet pipe 3, and the membrane assembly 9 is connected to the blower 13 through an air washing pipeline 15, and an electric valve 12 is provided on the pipeline; the return pipe 4 is arranged below the reaction area, connected to a return pump 16 outside the tank body 11, and then connected to the filling area.

[0014] The filter plate 7 is arranged at the bottom of the packing area. The packing area is provided with two layers of filter material 6. The lower layer of the filter material is quartz sand with a particle size of 0.5-2 mm, and the upper layer is AFM active filter material.

[0015] The membrane assembly 9 is arranged in the reaction zone and adopts a silicon carbide flat membrane with a filtration accuracy of 0.1 μm to 2 μm.

[0016] The basic working principle of the present invention is as follows: sewage enters the water distribution tank 1 through the water inlet pipe 2 and enters the tank body 11 of the device, and first enters the filling area from the bottom. The bottom of the tank body 11 is provided with an aeration pipe 5 for aeration. The sewage is filtered in the filling area and the organic matter is biochemically degraded, oxidized into harmless substances, and the BOD and COD in the water are reduced. The filter material 6 inside the tank body is attached with a large number of microorganisms to enhance the biochemical action, so that the organic matter in the sewage is thoroughly and effectively degraded, and the generation of sludge is effectively reduced. The AFM active filter material used has a small density, a higher specific surface area, a high filtration accuracy, is not easy to harden and has a long service life, and the AFM is negatively charged, which makes the impurities automatically adhere to the AFM surface through charge attraction, thereby achieving the purpose of filtering impurities. The treated water enters the reaction zone from above the baffle 8. The sewage in the reaction zone is filtered and extracted by the self-priming pump 14 through the membrane assembly 9. The membrane assembly 9 can effectively intercept the filter material and suspended matter and other impurities in the water. There is no need to set up a secondary sedimentation tank, and it can directly enter the clear water tank for discharge or reuse. After running for a period of time, close the electric valve on the outlet pipe, open the electric valve on the air washing pipe, and use the blower 13 to air wash the membrane assembly 9. During the cleaning, the AFM filter material rubs on the membrane surface, which will not damage the silicon carbide membrane, increase the cleaning effect, and do not need to be cleaned offline. When there are too many filter materials and sediments in the reaction area, the reflux pump 16 can be turned on to return them to the filter material area through the reflux pipe 4.

[0017] The invention has the characteristics of small occupation of land, low investment, stable effluent water quality, high degree of automation, no environmental pollution and high cost performance, and is a biological filter treatment device capable of performing sewage pretreatment and deep treatment.

Claims

1. A multi-purpose biofilter treatment device, characterized in that: It is mainly composed of a water distribution trough, a water inlet pipe, a water outlet pipe, a reflux pipe, an aeration pipe, filter material, a filter plate, a baffle, a membrane assembly, an overflow port and a tank body, and is characterized in that: the baffle is arranged in the middle of the tank body, dividing the tank body into a filling area and a reaction area; the water distribution trough is arranged above the tank body, connected to the water inlet pipe, and the water inlet pipe is arranged at the bottom of the filling area; the aeration pipe is arranged at the bottom of the tank body, and the aeration pipe is connected to the blower; the membrane assembly is connected to the self-priming pump outside the tank body through the water outlet pipe, and the membrane assembly is connected to the blower through the air washing pipe, and valves are provided on the pipes; the reflux pipe is arranged below the reaction area, connected to the reflux pump outside the tank body, and then connected to the filling area through a pipe.

2. A multi-purpose biofilter treatment device according to claim 1, characterized in that: The filter plate is arranged at the bottom of the packing area, and two layers of packing are arranged on the upper layer, the lower layer is quartz sand with a particle size of 0.5-2mm, and the upper layer is AFM active filter material.

3. A multi-purpose biofilter treatment device according to claim 1, characterized in that: The membrane assembly is arranged in the reaction zone and adopts a silicon carbide flat membrane with a filtration accuracy of 0.1μm~2μm.

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