Liftable fiber composite aeration system for special industrial wastewater treatment

Abstract

The invention relates to a liftable fiber composite aeration system for special industrial wastewater treatment. The liftable fiber composite aeration system comprises a fiber fabric tubular aerator, an air supply pipe, a high-pressure hose, a bracket and a lifting device, the fiber fabric layer adopts a micropore (10-50 [mu] m) structure, and is made of a composite material combining the inner core (aramid fiber) and the coating layer (polyurethane); the lifting device (guide rail-winch-sliding device) can lift the whole multi-layer support, and the consumed time is short. The device has the beneficial effects that efficient oxygen mass transfer can be carried out, and the energy consumption is low; the anti-blocking performance is excellent, and self-cleaning can be achieved; the durability and the environmental adaptability are high; maintenance is convenient, and adjustment is flexible; the aeration tank body can be efficiently covered, and the wastewater aeration effect is good; efficient operation can be kept in an extreme environment, the frequency of shutdown cleaning can be reduced, and the device is particularly suitable for industrial wastewater treatment with high pollution load.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of water oxygenation equipment, and particularly relates to an aeration system for special industrial wastewater treatment, in particular to a microporous aeration system based on special fiber fabric. BACKGROUND

[0002] Aeration is the process of forcing air into water to increase dissolved oxygen (DO), prevent suspended solids from settling, and promote microbial degradation of organic matter. It is mainly used in aquaculture and wastewater treatment, and in the activated sludge process, DO needs to be supplemented through bubble or surface aeration. Aeration pipe is a new type of aeration equipment that uses a blower to deliver air to a pool bottom device to form bubble diffusion for oxygen supply, and is widely used in A / O (anaerobic-aerobic process), A / O (anaerobic-anoxic-aerobic process), CASS (cyclic activated sludge process) and other processes. 2

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

[0004] In the steel industry: the wastewater contains a large amount of suspended particulate matter (such as iron oxide scale, coal powder), high concentration of calcium and magnesium ions, and emulsified oil substances. These components not only easily deposit and scale on the surface of the aerator, block the micropores, and reduce the oxygen mass transfer efficiency, but also accelerate the corrosion and aging of the rubber diaphragm, leading to frequent replacement and increasing the operation and maintenance cost.

[0005] In the electronics industry: the wastewater usually contains strong acid, strong base, organic solvent (such as isopropyl alcohol, acetone) and heavy metal (such as copper, nickel, cyanide). The traditional rubber material aerator (such as EPDM) is easy to swell or become brittle under extreme pH conditions, and the presence of organic solvents changes the surface tension of the water body, affecting bubble formation and further reducing oxygen utilization. In addition, heavy metal ions may inhibit the activity of microorganisms in the activated sludge, weakening the biological treatment effect.

[0006] In the landfill leachate treatment industry: the wastewater has ultra-high chemical oxygen demand, contains high ammonia nitrogen and complex pollutants (such as humic acid, chloride); these wastewater characteristics not only cause the problem of micropore blockage caused by microbial membrane attachment, but also require the aerator to operate in a high-salt, high-chlorine environment for a long time. Conventional aerators are made of stainless steel or rubber, which are easy to corrode and have a significantly shortened service life. At the same time, in order to meet the nitrification demand, long-term high-intensity aeration of landfill leachate is required, which has high energy consumption.

[0007] ​Aerator is the key equipment for oxygenation of water body, and is widely used in wastewater treatment, aquaculture and industrial wastewater treatment and other fields; at present, the conventional aerator on the market is mostly rubber material (such as using EPDM rubber diaphragm or using silicone rubber diaphragm) or mostly ceramic material; the conventional aerator on the market (such as the aerator using EPDM rubber diaphragm, ceramic disc type aerator and the like) is more difficult to be applied to the wastewater treatment of the above-mentioned special industries, and generally has the following defects:

[0008] (1) Weak corrosion resistance: the aerator of rubber material is easy to age and crack in strong acid, strong alkali or oil-containing wastewater, and the service life is greatly shortened; for example, EPDM rubber is easy to degrade in the environment with pH value less than 2 or pH value more than 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 has high cost and poor tear resistance.

[0009] (2) Easy to be blocked and need to be frequently maintained: the micropores of the traditional aerator are easy to be blocked by suspended solids, oil stains or calcium scale in the wastewater, and need to be cleaned (such as the biological slime in pharmaceutical wastewater adheres to the surface of rubber at a rate of 0.3 mm / month, and needs to be cleaned every quarter) or replaced frequently, increasing the operation and maintenance cost.

[0010] (3) High energy consumption: in order to make up for the decrease of oxygen mass transfer efficiency in the traditional aerator, the aeration intensity is often increased, but this increases the energy consumption, especially in deep water or high pollution load scenarios, the energy consumption increases more obviously.

[0011] (4) Short service life and need to be frequently replaced: in oil-containing wastewater (such as refinery wastewater), the rubber diaphragm of the aerator of rubber material swells due to the penetration of hydrocarbons, and the pore size expands (for example, the pore size increases from 0.5 mm to 1.2 mm), so the size of the bubbles passing through the diaphragm pore is not controlled, and the average diameter is 5 mm or more, thus causing the oxygen utilization rate to decrease by 40%; in strong acid electroplating wastewater with pH ≤ 2, structural rupture of the aeration diaphragm easily occurs, such as the surface of EPDM rubber diaphragm cracks (crack density ≥ 15 lines / cm 2 ) in 6 months; a PCB factory statistics that the replacement frequency of the traditional aerator is 3 times per year, and the comprehensive cost is 86,000 yuan / year (accounting for 19% of the total cost of wastewater treatment). SUMMARY

[0012] The purpose of the present application is to overcome the deficiencies in the prior art, and to provide a liftable fiber composite aeration system for special industrial wastewater treatment.

[0013] The lifting type fiber composite aeration system for special industrial wastewater treatment comprises a fiber fabric tube aeration device, a gas supply pipe, a high-pressure hose, a support and a lifting device.

[0014] A plurality of fiber fabric tube aeration devices are uniformly fixed on the support, and the multi-layer support is fixedly connected with the lifting device. The adjacent supports are spaced apart at a certain distance, and the adjacent fiber fabric tube aeration devices are spaced apart at a certain distance. The lifting device comprises a guide rail, a sliding device and a hoisting device. The guide rail is installed on the side wall of the aeration tank body, the support is fixedly connected with the sliding device, the sliding device is slidingly connected with the guide rail, and the top of the support is fixedly connected with the hoisting device. The fiber fabric tube aeration device is connected with the gas supply pipe, the gas supply pipe is connected with the high-pressure hose, and the high-pressure hose is connected with the air pipe.

[0015] The fiber fabric tube aeration device comprises a support, a special high-strength polymer material fiber fabric layer suitable for one-way stretching of the aeration system and a fixing member. The fiber fabric layer covers the support and is fixed to the support by the fixing member. The fiber fabric layer is composed of an inner core and a cladding layer located outside the inner core (i.e. a Core-Spun Yarn structure). The fiber fabric layer is uniformly distributed with micropores with a pore size of 10-50 μm generated by weaving. The micropore structure makes the bubble distribution uniform, increases the gas-liquid contact area and makes the oxygen mass transfer efficiency of the fiber fabric layer 10-15% higher than that of the traditional rubber membrane. The pore size can prevent suspended solids or oil stains from blocking the micropores while ensuring efficient oxygen mass transfer. The thickness of the fiber fabric layer is 1-2 mm. The fiber fabric layer has both flexibility and mechanical strength and is suitable for deep water and high impact load scenarios. The fiber fabric layer can elastically deform along the bubble generation direction during aeration and can rebound to the undeformed state when aeration stops.

[0016] As preferred, the inner core of the fiber fabric layer is made of aramid material, and the cladding layer is made of polyurethane material. Aramid provides core strength, has tensile resistance, fatigue resistance and chemical corrosion resistance to cope with the sewage environment. Polyurethane has high elasticity, strong recovery force, uniform micropore expansion capability, compression resistance, flexibility and 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 preferred, the aeration tank body bottom plate is further embedded with an adjusting support. A sealing interface for preventing sewage backflow is arranged on the top of the aeration tank body above the adjusting support. The adjusting support is fixedly connected with the guide rail installed on the side wall of the aeration tank body.

[0018] As preferred: the adjusting support comprises upper and lower parts screwed to each other, the height of the adjusting support is adjusted by the length of the upper part screwed out of the lower part, the height of the adjusting support is kept at a level that maintains the whole of the fiber fabric tubular aerator and the support horizontally on the bottom of the aeration tank body; the adjusting support is also fixedly connected to the lifting device by a lifting wire.

[0019] As preferred: the fiber fabric layer elastically deforms during aeration, the micro-holes open; the tension disappears when aeration stops, the fiber fabric rebounds to the undeformed state, the micro-holes close, which can effectively prevent sludge backflow and blockage of the pores.

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

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

[0022] As preferred: 30-40 fiber fabric tubular aerators are fixed on each support; the average bubble diameter of the fiber fabric layer is 0.8-1.2mm.

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

[0024] Step 1: aeration tank body pretreatment: burying adjusting supports on the bottom plate of the aeration tank body, and arranging a sealing interface on the aeration tank body above the top of the adjusting supports to prevent sewage backflow; installing guide rails on the two side walls of the aeration tank body;

[0025] Step 2: installation: fixing multiple fiber fabric tubular aerators on the multilayer support through buckles, fixing the multilayer support on the sliding device, slidingly connecting the sliding device to the guide rails, fixedly connecting the top of the support to the lifting device, lowering the multilayer support along the guide rails to the bottom of the aeration tank body through the lifting device, locking the positioning bolts after aligning the multilayer support with the adjusting supports, connecting the fiber fabric tubular aerators to the air supply pipes, connecting the air supply pipes to the high-pressure hoses, and connecting the high-pressure hoses to the air pipes; repeating the above steps until the fiber fabric tubular aerators cover all the aeration areas;

[0026] Step 3, debugging the aeration system: start the air blower, adjust the air pressure of the aeration tank body, check the uniformity of the air bubbles (require 90% or more area of the fiber fabric tube aerator bubble distribution uniformity); test the lifting function of the lifting device, under normal circumstances, the winch will lift the single layer support to the water surface 1m height, the time consumption is ≤3 minutes, no jam.

[0027] As preferred: the verticality deviation of the guide rail in step 1 is ≤2mm / m; the spacing between adjacent fiber fabric tube aerators in step 2 is within 1m; the air pressure of the aeration tank body in step 3 is adjusted to 0.05-0.1MPa.

[0028] The beneficial effects of the present application are:

[0029] Efficient oxygen mass transfer and 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), the oxygen mass transfer efficiency is increased by 10%-15% compared with the traditional rubber membrane, and the average diameter of the bubbles is 0.8-1.2mm, which is uniformly distributed, thereby improving the aeration efficiency.

[0030] Excellent anti-blocking performance and self-cleaning: during aeration, the fiber fabric layer elastically deforms in the direction of bubble production, and the micropores are opened; when aeration stops, the tension disappears and the micropores close, which can effectively prevent the backfilling of suspended solids, oil stains or sludge to block the pores, thereby prolonging the maintenance period.

[0031] Strong durability and environmental adaptability: the fiber fabric layer (75%-85% aramid and 15%-25% polyurethane) has the advantages of tensile resistance, fatigue resistance, chemical corrosion resistance (excellent corrosion resistance in pH value of 1-14 and oily wastewater, service life up to 8-10 years, 2-3 times longer than traditional rubber membrane), salt corrosion resistance (in wastewater with pH of 1-14 and Cl-≤5000mg / L, the service life of the aeration system can be up to 8 years or more), and high elasticity, thickness 1-2mm, suitable for deep water and high impact load scenarios; the support is made of 316L stainless steel or FRP material, which has strong corrosion resistance and prolongs the service life of the system.

[0032] Convenient maintenance and flexible adjustment: the lifting device (guide rail-winch-sliding device) can lift the whole multi-layer support and the time consumption is short (the maintenance time can be shortened from 2-3 days of traditional aeration to 4 hours), which is convenient for maintenance or replacement of the aerator without affecting the operation of the tank body; the adjusting support can be screwed to adjust the height to ensure the horizontal installation of the support to adapt to different tank bottom conditions.

[0033] The aeration tank body can be efficiently covered, and the aeration effect of wastewater is good: 30-40 aerators are fixed on a single support, densely arranged to cover the entire aeration area, combined with uniform bubble distribution, to improve the wastewater treatment efficiency (under the same aeration intensity, the energy consumption of the fiber fabric tube aeration device can be reduced by 15-18%, and the energy consumption of the fixed aeration system can be reduced by 40%) to meet the efficient purification demand of industrial wastewater.

[0034] The fiber fabric tube aeration device can maintain efficient operation in extreme environments, reduce the number of shutdown cleaning, and is especially suitable for industrial wastewater treatment with high pollution load: such as high-acid, high-alkali or oil-containing wastewater treatment in chemical, petroleum, pharmaceutical and other industries, high-suspended solid wastewater treatment in papermaking or food processing; it is also suitable for oxygenation of seawater fish and shrimp culture ponds. The problems of poor corrosion resistance, short service life, high energy consumption, difficult maintenance and high maintenance cost of traditional aeration devices in special scenarios are solved. The distribution or lifting power of the fiber fabric tube aeration device of the lifting type fiber composite aeration system can be adjusted according to actual needs. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a top view of the fiber fabric tube aeration device;

[0036] Figure 2 It is a schematic view of the fiber fabric tube aeration device arranged along the height direction in the aeration tank;

[0037] Figure 3 It is a schematic view of the aeration system and the connected external equipment;

[0038] Figure 4 It is a schematic view of the connection of the lifting wire and the adjusting support;

[0039] Figure 5 It is a schematic view of the fiber fabric tube aeration device arranged in layers and the support.

[0040] BRIEF DESCRIPTION OF DRAWINGS: fiber fabric tube aeration device 1, air supply pipe 2, lifting device 3, lifting wire 4, condensate water discharge pipe 5, adjusting support 6, high-pressure hose 7, guide rail 8, support 9, aeration tank body 10, air pipe 11, pressure control valve 12, air blower 13, support 14, fixing part 15, fiber fabric layer 16. DETAILED DESCRIPTION

[0041] The present application will be further described below in conjunction with the embodiments. The following description of the embodiments is only for the purpose of helping to understand the present application. It should be noted that for ordinary people in the technical field, some modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0042] As an embodiment, asFigures 1 to 5 The application discloses a lifting type fiber composite aeration system for special industrial wastewater treatment, which comprises a fiber fabric tubular aerator 1, a gas supply pipe 2, a high-pressure hose 7, a support 9 and a lifting device.

[0043] A plurality of fiber fabric tubular aerators 1 are uniformly fixed on the support 9, and a plurality of layers of the support 9 are fixedly connected with the lifting device. The adjacent supports 9 are spaced apart by a certain distance, and the adjacent fiber fabric tubular aerators 1 are spaced apart by a certain distance. The lifting device comprises a guide rail 8, a sliding device (a pulley block) and a hoisting device 3 (a winch, load ≥ 200 kg). The guide rail 8 is installed on the side wall of an aeration tank body 10, the support 9 is fixedly connected with the pulley block, the pulley block is slidingly connected with the guide rail 8, and the support 9 is fixedly connected with the winch at the top. The fiber fabric tubular aerator 1 is connected with the gas supply pipe 2, the gas supply pipe 2 is connected with the high-pressure hose 7, and the high-pressure hose 7 is connected with an air pipe 11. The air pipe 11 arranged outside the aeration tank body 10 is connected with a blower 13, and a pressure control valve 12 is further arranged on the air pipe 11 arranged outside the aeration tank body 10. The end of the air pipe 11 located at the bottom of the aeration tank body 10 is further connected with one end of a condensed water discharge pipe 5, the other end of the condensed water discharge pipe 5 is arranged to be out of the water surface and is arranged to be suspended in the air. The support 9 is made of 316L stainless steel or FRP material. There are 35 fiber fabric tubular aerators fixed on each support 9. The average bubble diameter of the fiber fabric layer 16 is 1 mm.

[0044] The fiber fabric tube aerator 1 comprises a support 14 (PVC support tube), a special high-strength fiber fabric layer 16 of high molecular material suitable for the one-way stretchable aeration system, and a fixing member 15 (stainless steel clamp), the fiber fabric layer 16 is covered on the PVC support tube and fixed on the PVC support tube by the stainless steel clamp, the fiber fabric layer 16 is composed of an inner core and a cladding layer located on the outer layer of the inner core (i.e. a core-spun yarn structure); the inner core of the fiber fabric layer 16 is made of aramid material, and the cladding layer is made of polyurethane material, the aramid provides core strength, has tensile resistance, fatigue resistance and chemical corrosion resistance to cope with the sewage environment, the polyurethane has high elasticity, strong restoring force, uniform micropore expansion capacity, compression resistance, flexibility and 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 micropores with a pore size of 10-50 μm generated by weaving, the micropore structure makes the bubble distribution uniform, increases the gas-liquid contact area, and makes the oxygen mass transfer efficiency of the fiber fabric layer increase by 10%-15% compared with the traditional rubber membrane, the pore size can prevent suspended solids or oil stains from blocking the micropores while ensuring efficient oxygen mass transfer; the thickness of the fiber fabric layer 16 is 1-2 mm, the fiber fabric layer has flexibility and mechanical strength, and is suitable for deep water and high impact load scenes; the fiber fabric layer 16 can elastically deform along the bubble generation direction during aeration and rebound to the undeformed state when aeration stops. The fiber fabric layer 16 elastically deforms during aeration, and the micropores open; when aeration stops, the tension disappears, the fiber fabric rebounds to the undeformed state, and the micropores close, which can effectively prevent sludge backflow and blockage of the pore channel.

[0045] The aeration tank body 10 bottom plate is also embedded with an adjusting support 6, the aeration tank body 10 above the top of the adjusting support 6 is provided with a sealing interface for preventing sewage backflow, and the adjusting support 6 is fixedly connected to the guide rail 8 installed on the side wall of the aeration tank body 10; the adjusting support 6 comprises two upper and lower parts that are screwed to each other, the height of the adjusting support 6 is adjusted by the length of the upper part screwed out of the lower part, and the height of the adjusting support 6 is kept at a height that maintains the fiber fabric tube aerator 1 and the support 9 as a whole in a horizontal state on the bottom of the aeration tank body 10; the adjusting support 6 is also fixedly connected to the winch through the lifting wire 4.

[0046] This lifting type fiber composite aeration system for special industrial wastewater treatment is installed and used as follows:

[0047] First, the aeration tank body is pretreated: the adjusting support 6 is embedded on the aeration tank body 10 bottom plate, the aeration tank body 10 above the top of the adjusting support 6 is provided with a sealing interface for preventing sewage backflow; the guide rail 8 is installed on the two side walls of the aeration tank body 10; the perpendicularity deviation of the guide rail 8 is ≤2 mm / m;

[0048] Reinstallation: a plurality of fiber fabric tube aerator 1 is fixed on the multi-layer support 9 by buckle (the spacing between adjacent fiber fabric tube aerator 1 is within 1m), the multi-layer support 9 is fixed on the sliding device, the sliding device is connected with the guide rail 8, the support 9 is fixedly connected with the lifting device 3, the multi-layer support 9 is lowered along the guide rail 8 to the bottom of the aeration tank body 10 through the lifting device 3, and the multi-layer support 9 is locked and positioned after being aligned with the adjusting support 6, the fiber fabric tube aerator 1 is connected with the air supply pipe 2, the air supply pipe 2 is connected with the high-pressure hose 7, and the high-pressure hose 7 is connected with the air pipe 11; the above steps are repeated until the fiber fabric tube aerator 1 covers all the aeration area;

[0049] Finally, the aeration system is debugged: the air blower 13 is started, the air pressure of the aeration tank body 10 is adjusted to 0.05-0.1 MPa, and the uniformity of the aeration bubbles is checked (the bubbles of the fiber fabric tube aerator are required to be uniformly distributed in 90% or more area); the lifting function of the lifting device is tested, and under normal circumstances, the winch lifts the single-layer support to the water surface 1m high, and the time consumption is ≤3 minutes without jamming;

[0050] After a period of use, the fiber fabric layer 16 is taken out for torsional stretching, so that the calcium scale attached to the surface can be removed, and the maintenance is convenient and fast.

[0051] The tensile strength test, hot air aging test, acid and alkali resistance test, and oil resistance test of the fiber fabric layer in the designed fiber fabric tube aerator are carried out, and the test results are shown in Table 1 as follows:

[0052] Table 1 Comparison table of performance test of fiber fabric layer and rubber layer

[0053]

[0054] As shown in Table 1 above, under the same experimental conditions, the tensile strength, heat air aging resistance, acid resistance coefficient, alkali resistance coefficient and oil resistance of the fiber fabric layer are all better than those of the 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 multi-layer support (9) is fixedly connected to the lifting device. 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 (10). The support (9) is fixedly connected to the sliding device. The sliding device is slidably connected to the guide rail (8). The top of the support (9) is fixedly connected to the lifting device (3). 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). 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.

2. The liftable fiber composite aeration system for treating special industrial wastewater according to claim 1, characterized in that: 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%.

3. The liftable fiber composite aeration system for treating special industrial wastewater according to claim 2, characterized in that: The bottom plate of the aeration tank body (10) is also provided with an adjustment support (6). The aeration tank body (10) above the top of the adjustment support (6) is provided with a sealing interface to prevent sewage backflow. The adjustment support (6) is fixedly connected to the guide rail (8) installed on the side wall of the aeration tank body (10).

4. The liftable fiber composite aeration system for treating special industrial wastewater according to claim 3, characterized in that: The adjustable support (6) comprises 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 bracket (9) as a whole horizontal at the bottom of the aeration tank (10). The adjustable support (6) is also fixedly connected to the lifting device (3) by a lifting wire (4).

5. The liftable fiber composite aeration system for treating special industrial wastewater according to claim 3, 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.

6. The liftable fiber composite aeration system for treating special industrial wastewater according to claim 3, characterized in that: An air pipe (11) located outside the aeration tank body (10) is connected to a blower (13), and a pressure control valve (12) is also provided on the air pipe (11) located outside the aeration tank body (10); the end of the air pipe (11) located at the bottom of the aeration tank body (10) is also connected to one end of a condensate drain pipe (5), and the other end of the condensate drain pipe (5) extends out of the water surface, is a certain height above the water surface and is suspended in the air.

7. The liftable fiber composite aeration system for treating special industrial wastewater according to claim 3, 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.

8. 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.

9. 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 8, 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 it 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.

10. The installation and use method of the liftable fiber composite aeration system for special industrial wastewater treatment according to claim 9, 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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