A liftable fiber composite aeration system for special industrial wastewater treatment

Abstract

The present application relates to a kind of special industrial wastewater treatment for lifting type fiber composite aeration system, comprising: fiber fabric tubular aerator, gas supply pipe, high-pressure hose, support and lifting device;Fiber fabric layer adopts microporous (10-50 μm) structure, combined with the composite material of inner core (aramid) and coating layer (polyurethane);Lifting device (guide rail-winch-sliding device) can be lifted to multiple layers of support whole and time-consuming is short.The beneficial effects of the present application are: efficient oxygen mass transfer can be carried out and energy consumption is low;Excellent anti-blocking performance and can be self-cleaning;With strong durability and environmental adaptability;Convenient maintenance and can be flexibly adjusted;Efficiently cover aeration tank, wastewater aeration effect is good;It can maintain efficient operation in extreme environment, can reduce the number of downtime cleaning, especially suitable for high pollution load industrial wastewater treatment.

Description

Technical Field

[0001] This invention belongs to the technical field of water oxygenation equipment, and particularly relates to an aeration system for the treatment of special industrial wastewater, specifically a microporous aeration system based on special fiber fabric. Background Technology

[0002] Aeration is the process of forcibly dissolving air in water to increase dissolved oxygen (DO), prevent suspended solids from settling, and promote the degradation of organic matter by microorganisms. It is mainly used in aquaculture and wastewater treatment. In activated sludge processes, DO needs to be supplemented through air bubbles or surface aeration. Compressed air aeration pipes are a new type of aeration equipment that uses a blower to deliver air to the bottom of the tank, forming bubbles that diffuse and supply oxygen. They are widely used in A / O (anaerobic-aerobic) processes and A / O (anaerobic-organic) processes. 2 Processes such as anaerobic-anoxic-aerobic process and CASS (circulating activated sludge process) are employed.

[0003] With the rapid development of industrialization, the wastewater generated by special industries such as steel, electronics and landfill leachate has complex water quality and high pollutant concentration, posing a severe challenge to the aeration equipment of wastewater treatment systems.

[0004] In the steel industry, wastewater contains a large amount of suspended particulate matter (such as iron oxide scale and coal dust), high concentrations of calcium and magnesium ions, and emulsified oily substances. These components not only easily deposit and form scale on the surface of aerators, clogging micropores and reducing oxygen mass transfer efficiency, but also accelerate the corrosion and aging of rubber diaphragms, leading to frequent replacements and increasing operation and maintenance costs.

[0005] In the electronics industry, wastewater typically contains strong acids, strong alkalis, organic solvents (such as isopropanol and acetone), and heavy metals (such as copper, nickel, and cyanide). Traditional rubber aerators (such as EPDM) are prone to swelling or embrittlement under extreme pH conditions, while the presence of organic solvents alters the surface tension of the water, affecting bubble formation and further reducing oxygen utilization. Furthermore, heavy metal ions may inhibit the activity of microorganisms in activated sludge, weakening the biological treatment effect.

[0006] In the landfill leachate treatment industry, wastewater has extremely high chemical oxygen demand, contains high levels of ammonia nitrogen, and contains complex pollutants (such as humic acid and chlorides). These characteristics of wastewater mean that aerators not only face the problem of micropore blockage caused by microbial film adhesion, but also require aerators to operate in a high-salt, high-chlorine environment for a long time. Conventional aerators are mostly made of stainless steel or rubber, which makes them susceptible to corrosion and significantly shortens their service life. At the same time, in order to meet the nitrification requirements, landfill leachate needs to be aerated for a long time with high intensity, resulting in high energy consumption.

[0007] Aerators are key equipment for oxygenating water bodies and are widely used in sewage treatment, aquaculture, and industrial wastewater treatment. Currently, most conventional aerators on the market are made of rubber (such as those using EPDM rubber membranes or silicone rubber membranes) or ceramic. Conventional aerators on the market (such as aerators using EPDM rubber membranes and ceramic disc aerators) are difficult to apply to wastewater treatment in the aforementioned special industries and generally have the following drawbacks:

[0008] (1) Weak corrosion resistance: Rubber aerators are prone to aging and cracking in strong acid, strong alkali or oily wastewater, which greatly shortens their service life; for example, EPDM rubber is prone to degradation in environments with pH values ​​below 2 or pH values ​​above 10; for example, high-salt wastewater (such as chloride ion concentration > 5000 mg / L) causes the elastic modulus of rubber to decrease by 37% and the aeration resistance to increase by 28%; although silicone rubber is resistant to acid and alkali, it is expensive and has poor tear resistance.

[0009] (2) Prone to clogging and requires frequent maintenance: The micropores of traditional aerators are easily clogged by suspended solids, oil or calcium scale in wastewater, requiring frequent cleaning (e.g., biological slime in pharmaceutical wastewater adheres to the rubber surface at a rate of 0.3 mm / month, requiring quarterly shutdown for cleaning) or replacement, increasing operation and maintenance costs.

[0010] (3) High energy consumption: In order to compensate for the decline in oxygen mass transfer efficiency in traditional aerators, it is often necessary to increase the aeration intensity, but this increases energy consumption, especially in deep water or high pollution load scenarios, where the energy consumption increases more significantly.

[0011] (4) Short lifespan and frequent replacement required: In oily wastewater (such as refinery wastewater), the rubber diaphragms of rubber aerators swell due to hydrocarbon penetration, resulting in enlarged pore sizes (e.g., pore size increases from 0.5 mm to 1.2 mm). The size of the bubbles passing through the pores becomes uncontrollable, with an average diameter of 5 mm or more, leading to a 40% decrease in oxygen utilization. In strongly acidic electroplating wastewater with pH ≤ 2, structural rupture of the aeration diaphragms is prone to occur. For example, EPDM rubber diaphragms will develop cracks on their surface after 6 months (crack density ≥ 15 cracks / cm). 2 According to statistics from a PCB factory, traditional aerators are replaced an average of 3 times a year, with a total cost of 86,000 yuan per year (accounting for 19% of the total cost of wastewater treatment). Summary of the Invention

[0012] The purpose of this invention is to overcome the shortcomings of the prior art and provide a liftable fiber composite aeration system for the treatment of special industrial wastewater.

[0013] This liftable fiber composite aeration system for treating special industrial wastewater includes: a fiber fabric tubular aerator, an air supply pipe, a high-pressure hose, a support frame, and a lifting device.

[0014] Multiple fiber fabric tubular aerators are evenly fixed on the support frame. The multi-layer support frame is fixedly connected to the lifting device. There is a certain distance between adjacent support frames and between adjacent fiber fabric tubular aerators. The lifting device includes a guide rail, a sliding device, and a lifting device. The guide rail is installed on the side wall of the aeration tank. The support frame is fixedly connected to the sliding device, and the sliding device is slidably connected to the guide rail. The top of the support frame is fixedly connected to the lifting device. The fiber fabric tubular aerators are connected to the air supply pipe, the air supply pipe is connected to the high-pressure hose, and the high-pressure hose is connected to the air pipe.

[0015] The fiber fabric tubular aerator includes a support component, a special high-strength polymer fiber fabric layer suitable for aeration systems that can stretch unidirectionally, and a fixing component. The fiber fabric layer covers the support component and is fixed to it by the fixing component. The fiber fabric layer consists of an inner core and a covering layer located outside the inner core (i.e., a core-spun yarn structure). The fiber fabric layer has uniformly distributed micropores with a pore size of 10-50 μm, which are generated by weaving. The micropore structure makes the bubble distribution uniform, increases the gas-liquid contact area, and improves the oxygen mass transfer efficiency of the fiber fabric layer by 10%-15% compared with traditional rubber diaphragms. This pore size can prevent suspended matter or oil from clogging the micropores while ensuring efficient oxygen mass transfer. The fiber fabric layer has a thickness of 1 mm-2 mm and combines flexibility and mechanical strength, making it suitable for deep water and high impact load scenarios. The fiber fabric layer can undergo elastic deformation along the bubble production direction during aeration and can rebound to an undeformed state when aeration stops.

[0016] As a preferred embodiment, the inner core of the fiber fabric layer is made of aramid, and the outer layer is made of polyurethane. Aramid provides core strength and has tensile strength, fatigue resistance, and chemical corrosion resistance to cope with wastewater environments. Polyurethane has high elasticity, strong resilience, uniform micropore expansion ability, resistance to compression deformation, flexibility, and ensures uniform aeration. In the fiber fabric layer, the mass ratio of aramid is 75-85%, and the mass ratio of polyurethane is 15-25%.

[0017] As a preferred option, the bottom plate of the aeration tank is also equipped with an adjustable support. The aeration tank body above the top of the adjustable support is equipped with a sealing interface to prevent sewage backflow. The adjustable support is fixedly connected to the guide rail installed on the side wall of the aeration tank body.

[0018] Preferably, the adjustable support consists of two parts, upper and lower, that are screwed together. The height of the adjustable support is adjusted by the length of the upper part that is screwed out from the lower part. The height of the adjustable support is maintained at a level that keeps the fiber fabric tubular aerator and the support frame horizontal at the bottom of the aeration tank. The adjustable support is also fixedly connected to a lifting device by a lifting wire.

[0019] As a preferred embodiment, the fiber fabric layer undergoes elastic deformation during aeration, opening the micropores; when aeration stops, the tension of the fiber fabric layer disappears, the fiber fabric rebounds to its undeformed state, and the micropores close, which can effectively prevent sludge backflow and blockage of the pores.

[0020] As a preferred embodiment: an air pipe located outside the aeration tank is connected to a blower, and a pressure control valve is also installed on the air pipe located outside the aeration tank; one end of the air pipe located at the bottom of the aeration tank is also connected to one end of a condensate drain pipe, and the other end of the condensate drain pipe extends out of the water surface, is a certain height above the water surface and is suspended in the air.

[0021] As a preferred option: the sliding device is a pulley block; the lifting device is a winch with a load capacity of ≥200kg; the support component is a PVC support pipe, and the fixing component is a stainless steel clamp; the bracket is made of 316L stainless steel or FRP material.

[0022] Preferably, each support is equipped with 30 to 40 fiber fabric tubular aerators; the average bubble diameter passing through the fiber fabric layer is 0.8 mm to 1.2 mm.

[0023] The installation and usage method of the liftable fiber composite aeration system for special industrial wastewater treatment includes the following steps:

[0024] Step 1: Pretreatment of the aeration tank body: Install adjusting supports on the bottom plate of the aeration tank body, and set a sealing interface to prevent sewage backflow on the aeration tank body above the top of the adjusting supports; install guide rails on both side walls of the aeration tank body.

[0025] Step 2, Installation: Secure multiple fabric tubular aerators to the multi-layer bracket using clips. Fix the multi-layer bracket to the sliding device. Slide the sliding device to the guide rail. Secure the top of the bracket to the lifting device. Use the lifting device to lower the multi-layer bracket along the guide rail to the bottom of the aeration tank. Align it with the adjusting support and tighten the positioning bolts. Connect the fabric tubular aerators to the air supply pipe. Connect the air supply pipe to the high-pressure hose. Connect the high-pressure hose to the air pipe. Repeat the above steps until the fabric tubular aerators cover the entire aeration area.

[0026] Step 3: Debug the aeration system: Start the blower, adjust the air pressure of the aeration tank, and check the uniformity of the aeration bubbles (the bubbles should be evenly distributed in more than 90% of the area of ​​the fiber fabric tubular aerator); test the lifting function of the lifting device. Under normal circumstances, the winch should lift the single-layer support to a height of 1m above the water surface in ≤3 minutes without any obstruction.

[0027] Preferably, in step 1, the verticality deviation of the guide rail is ≤2mm / m; in step 2, the spacing between adjacent fiber fabric tubular aerators is within 1m; and in step 3, the air pressure of the aeration tank is adjusted to 0.05~0.1MPa.

[0028] The beneficial effects of this invention are:

[0029] It can perform efficient oxygen mass transfer with low energy consumption: the fiber fabric layer adopts a microporous (10-50μm) structure, combined with the composite material of the inner core (aramid) and the coating layer (polyurethane), which improves the oxygen mass transfer efficiency by 10% to 15% compared with traditional rubber diaphragms. At the same time, the average bubble diameter is 0.8 to 1.2 mm, and the distribution is uniform, which improves the aeration efficiency.

[0030] Excellent anti-clogging performance and self-cleaning: During aeration, the fiber fabric layer undergoes elastic deformation due to the direction of bubble production, and the micropores open; when aeration stops, the tension disappears and the micropores close, which can effectively prevent suspended solids, oil or sludge from backflowing and clogging the channels, and extend the maintenance cycle.

[0031] It possesses strong durability and environmental adaptability: the fiber fabric layer (75%–85% aramid and 15%–25% polyurethane) combines tensile strength, fatigue resistance, chemical corrosion resistance (exhibiting excellent corrosion resistance in wastewater with pH values ​​of 1–14 and oily wastewater, with a service life of 8–10 years, 2–3 times longer than traditional rubber diaphragms), salt corrosion resistance (the aeration system can last for more than 8 years in wastewater with pH values ​​of 1–14 and Cl-≤5000mg / L), and high elasticity, with a thickness of 1–2mm, making it suitable for deep water and high impact load scenarios; the support frame is made of 316L stainless steel or FRP material, which has strong corrosion resistance and extends the service life of the system.

[0032] Easy to maintain and flexible to adjust: The lifting device (guide rail-winner-sliding device) can lift the multi-layer support as a whole in a short time (the maintenance time can be shortened from 2 to 3 days in traditional aeration to within 4 hours), which is convenient for repairing or replacing aerators and does not affect the operation of the tank; the adjustable support can be screwed to adjust the height to ensure that the support is installed horizontally to adapt to different tank bottom conditions.

[0033] It can efficiently cover the aeration tank and achieve good wastewater aeration: 30 to 40 aerators are fixed on a single support, densely arranged to cover the entire aeration area. Combined with uniform bubble distribution, it improves wastewater treatment efficiency (under the same aeration intensity, the fiber fabric tubular aerator used in this invention can reduce energy consumption by 15% to 18%, and can reduce sludge removal energy consumption by 40% compared to a fixed aeration system), meeting the high-efficiency purification needs of industrial wastewater.

[0034] It can maintain high efficiency in extreme environments, reducing the frequency of downtime for cleaning, and is particularly suitable for treating industrial wastewater with high pollution loads, such as high-acid, high-alkali, or oily wastewater from chemical, petroleum, and pharmaceutical industries, as well as high-suspended-solids wastewater from papermaking or food processing. It is also suitable for oxygenation in marine fish and shrimp aquaculture ponds. It solves the problems of poor corrosion resistance, short lifespan, high energy consumption, difficult inspection, and high maintenance costs associated with traditional aerators in special scenarios. The distribution or lifting power of the aerators in the liftable fiber composite aeration system can be adjusted according to actual needs. Attached Figure Description

[0035] Figure 1 A top cross-sectional view of a fiber fabric tubular aerator;

[0036] Figure 2 This is a schematic diagram showing the arrangement of fiber fabric tubular aerators along the height direction in an aeration tank.

[0037] Figure 3 This is a schematic diagram of the aeration system and the external equipment connected to it.

[0038] Figure 4 This is a schematic diagram showing the connection between the lifting wire and the adjusting support;

[0039] Figure 5 This is a schematic diagram of a layered fiber fabric tubular aerator and its support.

[0040] Explanation of reference numerals in the attached drawings: 1. Fiber fabric tubular aerator; 2. Air supply pipe; 3. Lifting device; 4. Lifting wire; 5. Condensate drain pipe; 6. Adjusting support; 7. High-pressure hose; 8. Guide rail; 9. Support; 10. Aeration tank body; 11. Air pipe; 12. Pressure control valve; 13. Blower; 14. Support component; 15. Fixing component; 16. Fiber fabric layer. Detailed Implementation

[0041] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0042] As one example, such as Figures 1 to 5 As shown, the liftable fiber composite aeration system for special industrial wastewater treatment includes: a fiber fabric tubular aerator 1, an air supply pipe 2, a high-pressure hose 7, a support 9, and a lifting device.

[0043] Multiple fiber fabric tubular aerators 1 are evenly fixed on the support frame 9. A lifting device is fixedly connected to the multi-layer support frame 9. Adjacent support frames 9 are spaced a certain distance apart, as are adjacent fiber fabric tubular aerators 1. The lifting device includes a guide rail 8, a sliding device (pulley block), and a lifting device 3 (winch, load ≥ 200 kg). The guide rail 8 is installed on the side wall of the aeration tank body 10. The support frame 9 is fixedly connected to the pulley block, which is slidably connected to the guide rail 8. A winch is fixedly connected to the top of the support frame 9. The fiber fabric tubular aerators 1 are connected to an air supply pipe 2, which is connected to a high-pressure hose 7. High-pressure hose 7 is connected to air pipe 11; air pipe 11 located outside aeration tank body 10 is connected to blower 13, and air pipe 11 located outside aeration tank body 10 is also equipped with pressure control valve 12; the end of air pipe 11 located at the bottom of aeration tank body 10 is also connected to one end of condensate drain pipe 5, and the other end of condensate drain pipe 5 extends out of the water surface, is a certain height above the water surface and is suspended in the air; support 9 is made of 316L stainless steel or FRP material; 35 fiber fabric tubular aerators are fixed on each support 9; the average bubble diameter passing through fiber fabric layer 16 is 1mm;

[0044] The fiber fabric tubular aerator 1 includes a support 14 (PVC support pipe), a special high-strength polymer fiber fabric layer 16 suitable for aeration systems and capable of unidirectional expansion and contraction, and a fixing element 15 (stainless steel clamp). The fiber fabric layer 16 covers the PVC support pipe and is fixed to it by the stainless steel clamp. The fiber fabric layer 16 consists of an inner core and a covering layer located outside the inner core (i.e., a core-spun yarn structure). The inner core of the fiber fabric layer 16 is made of aramid fiber, and the covering layer is made of polyurethane fiber. Aramid provides core strength and possesses tensile strength, fatigue resistance, and chemical corrosion resistance to cope with wastewater environments. Polyurethane has high elasticity, strong resilience, uniform micropore expansion capacity, resistance to compression deformation, flexibility, and ensures uniform aeration. In the fiber fabric layer 16, the mass ratio of aramid is 75-85%, and the mass ratio of polyurethane is 15-25%. The fiber fabric layer 16 is uniformly distributed with woven fibers having a pore size of 10-10 mm. The 50μm micropores ensure uniform bubble distribution, increase the gas-liquid contact area, and improve the oxygen mass transfer efficiency of the fiber fabric layer by 10%–15% compared to traditional rubber membranes. This pore size ensures efficient oxygen mass transfer while preventing clogging of the micropores by suspended solids or oil. The fiber fabric layer 16 has a thickness of 1mm–2mm, combining flexibility and mechanical strength, making it suitable for deep water and high-impact load scenarios. During aeration, the fiber fabric layer 16 can elastically deform along the bubble production direction and rebound to its undeformed state when aeration stops. During aeration, the fiber fabric layer 16 undergoes elastic deformation, opening the micropores; when aeration stops, the tension disappears, the fiber fabric rebounds to its undeformed state, and the micropores close, effectively preventing sludge backflow and clogging of the channels.

[0045] The bottom plate of the aeration tank body 10 is also equipped with an adjustable support 6. The aeration tank body 10 above the top of the adjustable support 6 is equipped with a sealing interface to prevent sewage backflow. The adjustable support 6 is fixedly connected to the guide rail 8 installed on the side wall of the aeration tank body 10. The adjustable support 6 consists of two parts, upper and lower, that are screwed together. The height of the adjustable support 6 is adjusted by the length of the upper part that is screwed out from the lower part. The height of the adjustable support 6 is maintained at a height that keeps the fiber fabric tubular aerator 1 and the support 9 horizontal at the bottom of the aeration tank body 10. The adjustable support 6 is also fixedly connected to a winch by a lifting steel wire 4.

[0046] This liftable fiber composite aeration system for treating special industrial wastewater requires the following installation and use:

[0047] First, pre-treatment of the aeration tank body is carried out: an adjusting support 6 is embedded in the bottom plate of the aeration tank body 10, and a sealing interface to prevent sewage backflow is set on the aeration tank body 10 above the top of the adjusting support 6; guide rails 8 are installed on both side walls of the aeration tank body 10; the verticality deviation of the guide rails 8 is ≤2mm / m.

[0048] Reinstallation: Secure multiple fabric tubular aerators 1 to the multi-layer support 9 using clips (the spacing between adjacent fabric tubular aerators 1 should be within 1m). Fix the multi-layer support 9 to the sliding device. Slidably connect the sliding device to the guide rail 8. Fix the top of the support 9 to the lifting device 3. Lower the multi-layer support 9 along the guide rail 8 to the bottom of the aeration tank 10 using the lifting device 3. Align it with the adjusting support 6 and tighten the positioning bolts. Connect the fabric tubular aerators 1 to the air supply pipe 2. Connect the air supply pipe 2 to the high-pressure hose 7. Connect the high-pressure hose 7 to the air pipe 11. Repeat the above steps until the fabric tubular aerators 1 cover the entire aeration area.

[0049] Finally, debug the aeration system: start blower 13, adjust the air pressure of aeration tank 10 to 0.05-0.1MPa, check the uniformity of aeration bubbles (the bubbles of the fiber fabric tubular aerators should be evenly distributed over 90% of the area); test the lifting function of the lifting device. Under normal circumstances, the winch should lift the single-layer support to a height of 1m above the water surface in ≤3 minutes without any obstruction.

[0050] After a period of use, the fiber fabric layer 16 can be removed and twisted and stretched to remove the calcium scale attached to the surface, making maintenance convenient and quick.

[0051] The tensile strength, hot air aging, acid and alkali resistance, and oil resistance of the fiber fabric layer in the designed fiber fabric tubular aerator were tested. The test results are shown in Table 1 below.

[0052] Table 1 Comparison of Performance Tests for Fiber Fabric Layer and Rubber Layer

[0053]

[0054] As shown in Table 1 above, under the same experimental conditions, the tensile strength, resistance to hot air aging, acid resistance, alkali resistance, and oil resistance of the fiber fabric layer are all superior to those of rubber.

Claims

1. A liftable fiber composite aeration system for treating special industrial wastewater, characterized in that, include: Fiber fabric tubular aerator (1), air supply pipe (2), high pressure hose (7), support (9) and lifting device; Multiple fiber fabric tubular aerators (1) are uniformly fixed on the support (9). The lifting device is fixedly connected to multiple layers of the support (9). There is a certain distance between adjacent supports (9) and between adjacent fiber fabric tubular aerators (1). The lifting device includes a guide rail (8), a sliding device, and a lifting device (3). The guide rail (8) is installed on the side wall of the aeration tank body (10). The sliding device is fixedly connected to the support (9). The sliding device is slidably connected to the guide rail (8). The lifting device (3) is fixedly connected to the top of the support (9). The fiber fabric tubular aerator (1) is connected to the air supply pipe (2). The air supply pipe (2) is connected to the high-pressure hose (7). The high-pressure hose (7) is connected to the air pipe (11). An adjusting support (6) is also embedded in the bottom plate of the aeration tank body (10). The aeration device is located above the top of the adjusting support (6). The tank body (10) is provided with a sealing interface to prevent sewage backflow. The adjusting support (6) is fixedly connected to the guide rail (8) installed on the side wall of the aeration tank body (10). The height of the adjusting support (6) is maintained at the height that keeps the fiber fabric tubular aerator (1) and the bracket (9) in a horizontal state at the bottom of the aeration tank body (10). The adjusting support (6) is also fixedly connected to the lifting device (3) by the lifting wire (4). The air pipe (11) located outside the aeration tank body (10) is connected to a blower (13). The air pipe (11) located outside the aeration tank body (10) is also provided with a pressure control valve (12). The end of the air pipe (11) located outside the aeration tank body (10) is also connected to one end of the condensate drain pipe (5). The other end of the condensate drain pipe (5) extends out of the water surface, is higher than the water surface, and is suspended in the air. The fiber fabric tubular aerator (1) includes a support (14), a fiber fabric layer (16), and a fixing member (15). The fiber fabric layer (16) covers the support (14) and is fixed to the support (14) by the fixing member (15). The fiber fabric layer (16) consists of an inner core and a covering layer located outside the inner core. The fiber fabric layer (16) has micropores with a pore size of 10 to 50 μm evenly distributed on it. The fiber fabric layer (16) has a thickness of 1 mm to 2 mm. The fiber fabric layer (16) can undergo elastic deformation along the direction of bubble production during aeration and can rebound to an undeformed state when aeration stops. The inner core of the fiber fabric layer (16) is made of aramid, and the covering layer is made of polyurethane. In the fiber fabric layer (16), the mass ratio of aramid is 75-85%, and the mass ratio of polyurethane is 15-25%.

2. The liftable fiber composite aeration system for treating special industrial wastewater according to claim 1, characterized in that: The adjusting support (6) comprises two parts, upper and lower, that are screwed together. The height of the adjusting support (6) is adjusted by the length of the upper part that is screwed out from the lower part.

3. The liftable fiber composite aeration system for treating special industrial wastewater according to claim 1, characterized in that: The fiber fabric layer (16) undergoes elastic deformation during aeration, and the micropores open; when aeration stops, the fiber fabric layer (16) rebounds to an undeformed state, and the micropores close.

4. The liftable fiber composite aeration system for treating special industrial wastewater according to claim 1, characterized in that: The sliding device is a pulley block; the lifting device (3) is a winch; the support (14) is a PVC support pipe; the fixing part (15) is a stainless steel clamp; the bracket (9) is made of 316L stainless steel or FRP.

5. The liftable fiber composite aeration system for treating special industrial wastewater according to claim 1, characterized in that: Each of the brackets (9) is fixed with 30 to 40 of the fiber fabric tubular aerators (1); the average bubble diameter through the fiber fabric layer (16) is 0.8 mm to 1.2 mm.

6. A method for installing and using a liftable fiber composite aeration system for treating special industrial wastewater as described in any one of claims 1 to 5, characterized in that, Includes the following steps: Step 1, Pretreatment of aeration tank body: An adjusting support (6) is embedded in the bottom plate of the aeration tank body (10), and a sealing interface to prevent sewage backflow is set on the aeration tank body (10) above the top of the adjusting support (6); guide rails (8) are installed on both sides of the aeration tank body (10). Step 2, Installation: Fix multiple fiber fabric tubular aerators (1) to the multi-layer bracket (9) with buckles, fix the multi-layer bracket (9) to the sliding device, slide the sliding device to the guide rail (8), fix the top of the bracket (9) to the lifting device (3), lower the multi-layer bracket (9) along the guide rail (8) to the bottom of the aeration tank (10) through the lifting device (3), align the multi-layer bracket (9) with the adjusting support (6) and lock it, connect the fiber fabric tubular aerator (1) to the air supply pipe (2), connect the air supply pipe (2) to the high pressure hose (7), and connect the high pressure hose (7) to the air pipe (11); repeat the above steps until the fiber fabric tubular aerator (1) covers the entire aeration area; Step 3, Adjust the aeration system: Start the blower (13), adjust the air pressure of the aeration tank (10), and check the uniformity of the aeration bubbles.

7. The installation and use method of the liftable fiber composite aeration system for special industrial wastewater treatment according to claim 6, characterized in that: In step 1, the verticality deviation of the guide rail (8) is ≤2mm / m; in step 2, the distance between adjacent fiber fabric tubular aerators (1) is within 1m; in step 3, the air pressure of the aeration tank (10) is adjusted to 0.05~0.1MPa.

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