Membrane aeration MABR efficient oxygen transfer system

Abstract

The utility model discloses a membrane aeration MABR high-efficiency oxygen transfer system, which comprises a biochemical pool, a plurality of groups of aeration membranes MABRs are fixedly arranged at the bottom of an inner cavity of the biochemical pool, air supply branch pipes are connected among the outer surfaces of the upper ends of the plurality of groups of aeration membranes MABRs, an air blower is arranged on one side of the biochemical pool, and an air outlet is arranged on the other side of the biochemical pool. An air supply main pipe is arranged between the air supply branch pipe and the air blower, the air supply main pipe is fixedly connected between the air blower and the air supply branch pipe, and the aeration membrane MABR is of a double-layer structure of modified hydrophobic hollow fiber membrane externally woven with nanofiber filler. According to the membrane aeration MABR high-efficiency oxygen transfer system disclosed by the utility model, the average pore diameter of the aeration membrane MABR is only 0.1 mu m, and the diameter of bubbles generated by aeration is very small, so that the oxygen transfer efficiency is greatly improved, the oxygen transfer efficiency is up to more than 50-60%, the gas-water ratio can be reduced to below 3: 1, and compared with the prior art, the energy consumption is only 30-40% of that of the traditional process, and a better use prospect is brought.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a membrane aeration MABR high-efficiency oxygen transfer system. Background Art

[0002] Traditional aerobic biological treatment requires sufficient dissolved oxygen concentration to remove organic matter from water to ensure effective degradation of organic matter. Currently, traditional aeration is mainly used. Aeration is to compress air to the aeration plate at the bottom of the biochemical pool to supply oxygen to the water in the form of bubbles. However, the oxygen utilization rate of traditional aeration is low, generally less than 20%; and larger bubbles are generated during the aeration process. Most of the oxygen escapes into the air before it is effectively dissolved in the water. This is the most important reason why the energy efficiency utilization rate of blowers in sewage treatment plants is low and the operating costs of sewage treatment plants are high.

[0003] To this end, we propose a membrane aeration MABR efficient oxygen transfer system. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the utility model provides a membrane aeration MABR high-efficiency oxygen transfer system, which has the advantages of high efficiency and low energy consumption, and can effectively solve the problems in the background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a membrane aeration MABR high-efficiency oxygen transfer system, including a biochemical pool, an aeration membrane MABR is fixedly installed at the bottom of the inner cavity of the biochemical pool, the number of the aeration membrane MABR is multiple groups, and air supply branches are connected between the upper outer surfaces of the multiple groups of aeration membrane MABRs. A blower is provided on one side of the biochemical pool, and an air supply main pipe is provided between the air supply branch pipe and the blower, and the air supply main pipe is fixedly connected between the blower and the air supply branch pipe.

[0008] Preferably, the aeration membrane MABR adopts a double-layer structure of a modified hydrophobic hollow fiber membrane and an outer woven nanofiber filler.

[0009] Preferably, the aeration membrane MABR membrane has a pore size of 0.1 μm and a porosity of not less than 70%.

[0010] Preferably, the aerated membrane MABR is assembled in a modular manner, and each module has three sizes, including 880×650×2.0mm, 2000×1000×2.4mm and 2600×1300×3.0mm.

[0011] Preferably, the air inlet pressure of the aerated membrane MABR is 0.02-0.1 MPa, and the air inlet volume is 0.5-24.0 m3 / h.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a membrane aeration MABR high-efficiency oxygen transfer system, which has the following beneficial effects:

[0014] 1. This is a membrane aerated MABR high-efficiency oxygen transfer system. The aerated membrane MABR has an average pore diameter of only 0.1μm, and the diameter of the bubbles produced by aeration is very small, which greatly improves the oxygen transfer efficiency. The oxygen transfer efficiency is as high as 50-60% or more, and the gas-water ratio can be reduced to below 3:1. In comparison, the energy consumption is only 30-40% of that of the traditional process.

[0015] 2. This membrane aeration MABR high-efficiency oxygen transfer system, the aeration membrane MABR adopts a double-layer structure of modified hydrophobic polytetrafluoroethylene hollow fiber and outer woven nanofiber filler, which not only has the characteristics of high tensile strength, high compressive strength, and strong acid, alkali and oxidation resistance, but also has a service life of more than 10 years, which has obvious advantages over the 3-5 years of life of existing tubular aeration pipes or aeration plates. The outer woven nanofiber filler can also attach microorganisms to efficiently degrade organic pollution in reclaimed water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a membrane aeration MABR high-efficiency oxygen transfer system of the utility model.

[0017] In the figure: 1. Blower; 2. Air supply main pipe; 3. Air supply branch pipe; 4. Aeration membrane MABR; 5. Biochemical pool. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] This embodiment is a membrane aeration MABR high-efficiency oxygen transfer system.

[0020] like Figure 1 As shown, it includes a biochemical pool 5, an aeration membrane MABR4 is fixedly installed at the bottom of the inner cavity of the biochemical pool 5, the number of aeration membranes MABR4 is multiple groups, and an air supply branch pipe 3 is connected between the upper outer surfaces of the multiple groups of aeration membranes MABR4. A blower 1 is arranged on one side of the biochemical pool 5, and an air supply main pipe 2 is arranged between the air supply branch pipe 3 and the blower 1. The air supply main pipe 2 is fixedly connected between the blower 1 and the air supply branch pipe 3.

[0021] The aeration membrane MABR4 adopts a double-layer structure of modified hydrophobic hollow fiber membrane and woven nanofiber filler; the pore size of the aeration membrane MABR4 is 0.1μm, and the porosity is not less than 70%; the aeration membrane MABR4 is assembled in modules, and each module has three sizes, including 880×650×2.0mm, 2000×1000×2.4mm and 2600×1300×3.0mm; the air inlet pressure of the aeration membrane MABR4 is 0.02-0.1Mpa, and the air inlet volume is 0.5-24.0m3 / h.

[0022] It should be noted that the utility model is a membrane aeration MABR high-efficiency oxygen transfer system. The aeration membrane MABR4 has an average pore diameter of only 0.1μm, and the diameter of the bubbles generated by aeration is very small, which greatly improves the oxygen transfer efficiency. The oxygen transfer efficiency is as high as 50-60% or more, and the gas-water ratio can be reduced to below 3:1. In comparison, the energy consumption is only 30-40% of the traditional process; the aeration membrane MABR4 adopts a double-layer structure of modified hydrophobic polytetrafluoroethylene hollow fiber and outer woven nanofiber filler, which not only has high tensile strength and strong compressive strength, but also has a strong The aeration membrane MABR4 adopts the double-layer structure of modified hydrophobic hollow fiber membrane and external woven nanofiber filler. Under the promotion of the oxygen partial pressure difference on both sides of the membrane, the oxygen molecules in the membrane cavity flow from the inner layer of the aeration membrane to the outer layer. Combined with the method of controlling the aeration pressure, no bubbles or only nano-scale bubbles are generated, and the oxygen utilization rate is more than 50-60%. The external woven nanofiber filler, as a carrier for the growth and attachment of microorganisms, can form a large number of microbial communities with rich species, which can efficiently and stably degrade and remove organic pollutants. The average pore size of the aeration membrane is 0.1μm, the porosity is not less than 70%, the tensile strength is large, the compressive strength is high, and the strong acid, alkali and strong oxidation resistance characteristics can be applied. For various media such as municipal sewage and industrial wastewater, the service life is not less than 10 years. Modular assembly is adopted. Each aeration membrane MABR4 has three sizes: 880×650×2.0mm (length, width and height), 2000×1000×2.4mm (length, width and height), and 2600×1300×3.0mm (length, width and height). The oxygen utilization rate is 50-60%, the air inlet pressure is 0.02-0.1Mpa, and the air inlet volume is 0.5-24.0m3 / h, which can cope with various biochemical systems for sewage treatment.

[0023] It should be noted that, in this article, relational terms such as first and second (number one, number two), etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0024] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A membrane aeration MABR high-efficiency oxygen transfer system, comprising a biochemical pool (5), characterized in that: An aeration membrane MABR (4) is fixedly installed at the bottom of the inner cavity of the biochemical pool (5). The number of the aeration membrane MABR (4) is multiple groups. An air supply branch pipe (3) is connected between the upper outer surfaces of the multiple groups of aeration membrane MABR (4). A blower (1) is arranged on one side of the biochemical pool (5). An air supply main pipe (2) is arranged between the air supply branch pipe (3) and the blower (1). The air supply main pipe (2) is fixedly connected between the blower (1) and the air supply branch pipe (3). The aeration membrane MABR (4) adopts a double-layer structure of a modified hydrophobic hollow fiber membrane and an outer woven nanofiber filler. The membrane pore size of the aeration membrane MABR (4) is 0.1 μm, and the porosity is not less than 70%.

2. A membrane aeration MABR high-efficiency oxygen transfer system according to claim 1, characterized in that: The aeration membrane MABR (4) is assembled in a modular manner, and each module has three sizes, including 880×650×2.0 mm, 2000×1000×2.4 mm, and 2600×1300×3.0 mm.

3. A membrane aeration MABR high-efficiency oxygen transfer system according to claim 2, characterized in that: The air inlet pressure of the aeration membrane MABR (4) is 0.02-0.1 MPa, and the air inlet volume is 0.5-24.0 m3 / h.

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