A fully isobaric balanced aeration device and its installation and use method

Abstract

The present invention discloses a fully isobaric balanced aeration device and an installation and use method thereof, and belongs to the technical field of sewage treatment. The aeration device comprises a fully isobaric pressure-stabilizing gas distribution assembly (1) arranged on the ground at the front side of an aeration tank (7), the fully isobaric pressure-stabilizing gas distribution assembly (1) being vertically connected downwardly to a plurality of vertical water inlet air supply branches (2), the water inlet air supply branches (2) being connected to a straight aeration hose (3) on the bottom surface of the aeration tank (7), and the aeration hose (3) being fixed by a row of spaced-apart limit balance modules (4). The installation and use method comprises step 1, calculating the pressure loss of the aeration hose; step 2, installing the limit balance module; step 3, compensating and leveling; and step 4, immersion test. The technical effect of the present invention is that the uniformity of the air supply of the entire aeration tank is improved, thereby improving the oxygen mass transfer efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a fully isobaric balanced aeration device and an installation and use method thereof. Background Art

[0002] Aeration tank is a biochemical reactor designed according to the characteristics of microorganisms, used for the degradation of organic pollutants in sewage. Aeration tank mainly consists of three parts: tank body, aeration device and water inlet and outlet. The function of aeration is to make air and sewage contact strongly, achieve the purpose of oxygenation, accelerate the oxidation and decomposition of organic matter or blow off volatile substances in sewage. The efficiency of aeration device plays a decisive role in the degradation degree of organic pollutants.

[0003] At present, there are problems such as low mass transfer efficiency, uneven distribution of air supply pressure, and easy blockage of aeration devices in the aeration device, which cause the wastewater in some areas to be insufficiently supplied with oxygen, affecting the degradation activity of microorganisms and the treatment effect of sewage. The uneven distribution of air supply pressure is because when air enters the aeration pipe from the distribution branch pipe, according to the Bernoulli principle:

[0004]

[0005] Where P is the pressure at a point in the fluid, in Pascals (Pa); v is the velocity of the fluid at that point, in meters per second (m / s); ρ is the density of the fluid, in kilograms per cubic meter (kg / m 3 ), g is the acceleration due to gravity, in meters per second (m / s 2 ); h is the height of the liquid level in meters (m); C is a constant. There is an inverse relationship between the velocity and pressure of the fluid. When the flow rate increases, the pressure at that location will decrease, resulting in a decrease in the air supply. Unlike tubular aeration pipes, when an aeration hose is used, the hose has a high degree of variability during operation. The flow rate at the head of the hose is usually higher because the cross-sectional area is reduced from the air supply branch to the aeration hose. According to the continuity equation:

[0006] v1×A1=v2×A2

[0007] In the formula, A1 and A2 are the areas of the flow sections at both ends of the flow section; v1 and v2 represent the average flow velocity of the corresponding sections, and the mass flow rate of the fluid in the pipeline is constant. The cross-sectional area from the air supply branch pipe to the aeration hose decreases, the flow velocity increases, and the static pressure drop occurs, which will lead to pressure loss at the head end and reduce the air supply.

[0008] In addition, there is a certain resistance and friction in the aeration pipe, which will cause pressure loss when the gas passes through the pipe. Especially in long-distance aeration pipes, the pressure loss may be more significant. Higher pressure loss will lead to lower pressure at locations far away from the air supply end, which will lead to a reduction in the air supply at the end. Compared with traditional aerators, the aeration hoses currently emerging on the market have advantages such as high mass transfer efficiency and low clogging, and are widely used in aeration tanks of sewage treatment plants. However, due to the uneven pressure distribution at the head and end, the aeration of the entire system is uneven. The horizontality of the aeration hose installation has a great influence on the uniformity of air distribution, which may cause different gas flow rates at different locations, resulting in uneven size and distribution of bubbles in the water, which weakens the oxygen transfer efficiency and sewage treatment effect. In the case of large pressure loss, the gas at certain locations cannot enter the water smoothly, reducing the sewage treatment quality of the aeration tank. Summary of the invention

[0009] In view of the problems existing in the prior art, the technical problem to be solved by the present invention is to provide a fully isobaric balanced aeration device, which can improve the uniformity of the gas supply of the entire aeration tank, thereby improving the oxygen mass transfer efficiency. The present invention also provides an installation and use method of the balanced aeration device.

[0010] To solve the above technical problems, the technical solution of the present invention is:

[0011] The present invention provides a fully isobaric balanced aeration device, comprising a fully isobaric pressure-stabilizing gas distribution component arranged on the ground at the front side of an aeration tank, the fully isobaric pressure-stabilizing gas distribution component being connected to a blower, the fully isobaric pressure-stabilizing gas distribution component being vertically connected downwardly to a plurality of vertical water inlet air supply branch pipes, the water inlet air supply branch pipes being connected to a straight aeration hose on the bottom surface of the aeration tank, the aeration hose being fixed by a row of spaced-apart limit-balancing modules, and the base of each limit-balancing module being fixed on a connecting rod.

[0012] The present invention also provides a method for installing and using a full isobaric balanced aeration device, comprising the following steps:

[0013] Step 1: Calculation of aeration hose pressure loss:

[0014] The flow rate of the water inlet air supply pipe v1=Q / (n1×A1), where Q is the design flow rate, n1 is the number of water inlet air supply pipes, and A1 is the area of ​​the water inlet air supply pipe;

[0015] The flow rate at the aeration pipe inlet is v2 = Q1 / (n2×A2), where Q1 is the design flow rate of a single water inlet air supply pipe, n2 is the number of aeration hoses connected to a single water inlet air supply pipe, and A2 is the area of ​​the aeration hose;

[0016] Calculate the inlet air pressure drop dp = 1 / 2 × ρ 空气 ×(v1 2 -v22 );

[0017] Calculate the pressure loss along the aeration hose ΔPm = Δpm × L, where Δpm represents the pressure loss along the aeration hose per meter, and L represents the length of the aeration hose;

[0018] Step 2: Install the limit balance module: Install the limit balance module based on the bottom surface of the flat pool, and rotate the bracket slide to make the top surface of the aeration hose in the same plane, with a flatness error within 1mm;

[0019] Step 3: Compensation and leveling: After all limit balance modules are leveled, ρ1 represents the density of air, v represents the velocity of gas, ρ2 represents the density of sewage, g represents the acceleration of gravity, and h represents the depth of the aeration hose from the water surface. When pressure loss occurs locally, in order to ensure consistent air supply pressure, the limit balance module is used to increase the height and reduce the height h of the pipe from the water surface. By reducing the hydrostatic pressure, the pressure loss dp at the head end of the aeration hose and the pressure loss ΔPm at the end are compensated to achieve constant air supply pressure ΔP. The limit balance module is used to increase the height of the aeration inlet and the aeration end, and the linear difference compensation adjustment in the middle position is adjusted. After completion, the aeration hose is installed in a threaded manner.

[0020] Step 4: Water immersion test: After completing the pipeline connection, cleaning, and sealing test, fill the aeration tank with clean water. When the water level is 100mm higher than the highest position of the aeration pipe, test the aeration uniformity under the preset aeration volume conditions.

[0021] The technical effects of the present invention are:

[0022] The limit balance module of the present invention makes the aeration pressure distribution more balanced, and realizes the balanced pressure distribution of the whole aeration system by locally fine-tuning the pressure loss part. The holes on the aeration hose are evenly distributed and have a high density. The bubbles generated are even, small, and slowly rising, which increases the contact area with the sewage and reduces the aggregation and merging between bubbles. The larger the bubbles, the smaller the specific surface area; the smaller the bubbles, the larger the specific surface area, which increases the chance of contact with pollutants, thereby achieving efficient oxygen mass transfer efficiency. The aeration hose can be cleaned regularly to avoid blockage caused by sludge deposition, has a long service life, and the pore diameter changes very little during the service life. The oxygen utilization rate basically does not decline, and it can be maintained without affecting the operation of the aeration tank. The high efficiency and stability of oxygen mass transfer in the aeration tank are effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings of the present invention are as follows:

[0024] Figure 1 It is a horizontal cross-sectional view of the present invention arranged in an aeration tank;

[0025] Figure 2 A vertical cross-sectional view of the present invention arranged in an aeration tank;

[0026] Figure 3 It is a structural diagram of the limit balance module;

[0027] Figure 4 for Figure 3 Schematic diagram of the lifting mechanism structure;

[0028] Figure 5 It is the connection diagram of the full pressure anti-dropping component.

[0029] In the figure, 1. Full isobaric pressure-stabilizing gas distribution assembly; 2. Water inlet air supply branch pipe; 3. Aeration hose; 4. Limiting balance module; 5. Connecting rod; 6. Connecting rope; 7. Aeration tank; 8. Full pressure anti-slip component;

[0030] 41. Guide wheel; 42. Back-facing U-shaped locking buckle; 43. Lifting mechanism; 44. Fixing rod; 45. Center hole groove; 46. Support; 47. Bracket slide cylinder; 48. Base cylinder; 81. Pagoda connection; 82. Elastic inner pagoda cone ring; 83. Outer cone sleeve. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0032] In order to clearly describe the content of the invention, this patent application uses the directional words "front", "back", "upper" and "lower" for distinction. The "front", "back", "upper" and "lower" are determined based on the layout orientation of the above drawings. When the actual use direction of the present invention changes, the directional designation changes accordingly, which cannot be regarded as a limitation on the scope of patent protection.

[0033] like Figure 1 and Figure 2 As shown, the present invention includes a full isobaric pressure-stabilizing gas distribution component 1 arranged on the ground in front of the aeration tank 7, the full isobaric pressure-stabilizing gas distribution component 1 is connected to the blower, and the full isobaric pressure-stabilizing gas distribution component 1 is vertically connected to a plurality of vertical water inlet air supply branches 2 downward, the water inlet air supply branches 2 are connected to the straight aeration hose 3 on the bottom surface of the aeration tank 7, and the aeration hose 3 is fixed by a row of spaced-apart limit balance modules 4, and the base of each limit balance module 4 is welded and fixed on the connecting rod 5. The connecting rod 5 is used to connect each limit balance module 4 as a whole, and arrange them in a line at the bottom of the aeration tank.

[0034] The aeration hose 3 has a single layer without inner and outer linings. The installation stretching length of a single aeration hose 3 and the supporting system must be no less than 8%. There is no docking in the middle and it is laid on the bottom of the aeration tank using a guide device.

[0035] The fully isobaric pressure-stabilizing gas distribution component 1 is used to stabilize the intake pressure and reduce the intake gas flow rate. It is often used for gas transportation and distribution in aeration devices, and is a device for realizing isobaric pressure stabilization and gas distribution in pipelines. Its working principle is to form a stable pressure inside the component by adjusting the valve or regulating device inside the component, thereby realizing balanced distribution of gas flow at each outlet.

[0036] The principle of the limit balance module of the present invention to achieve pressure balance in the aeration hose is:

[0037] When the gas flows from the water inlet gas supply pipe 2 to the aeration hose 3, according to the continuity equation:

[0038] v1×A1=v2×A2

[0039] In the formula, A1 and A2 are the areas of the flow sections at both ends of the flow section; v1 and v2 represent the average flow velocities of the corresponding sections. The mass flow rate of the gas in the pipeline is constant. Calculate the gas flow rate in the aeration pipe according to the air flow pressure drop:

[0040] dp=1 / 2×ρ 空气 ×(v1 2 -v2 2 )

[0041] Calculate the pressure loss dp at the beginning of the aeration hose.

[0042] Due to the existence of resistance loss along the aeration hose, the pressure at the end of the aeration hose will also decrease, resulting in a decrease in flow rate. According to calculation, the end pressure loss ΔPm is:

[0043] ΔPm=Δpm×L

[0044] In the formula, Δpm represents the pressure loss along the pipeline per meter, and L represents the length of the aeration pipe. Similar to the pressure compensation at the head end of the aeration hose, pressure compensation is performed by increasing the height of the hose end.

[0045] The pressure ΔP provided at a certain point in the aeration hose is the difference between the dynamic pressure of the compressed air and the static pressure of the upper water layer. The formula is:

[0046]

[0047] Where ρ1 represents the density of air, v represents the velocity of gas, ρ2 represents the density of sewage, g represents the acceleration of gravity, and h represents the depth of the aeration hose from the water surface. When pressure loss occurs locally, in order to ensure consistent air supply pressure, the height is increased by the limit balance module 4, and the height h of the pipeline from the water surface is reduced. By reducing the hydrostatic pressure, the pressure loss dp at the head end of the aeration hose and the pressure loss ΔPm at the end of the aeration hose are compensated to achieve constant air supply pressure ΔP.

[0048] like Figure 3 As shown, the limit balance module 4 includes a lifting mechanism 43, a fixing rod 44, a guide wheel 41 and a back-facing U-shaped locking buckle 42. The guide wheel 41 is inserted into the fixing rod 44 and is locked in place by the back-facing U-shaped locking buckle 42. The two ends of the upper and lower fixing rods 44 are respectively inserted into the upper and lower seat holes of the lifting mechanism 43 on both sides. The concave surfaces of the two guide wheels 41 corresponding to the upper and lower fixing rods 44 form a central hole groove 45, which is used to pass through and support the aeration hose 3.

[0049] like Figure 4 As shown, the lifting mechanism 43 includes a base tube 48, a bracket slide 47 and a support 46; an internal thread for adjusting the height is arranged inside the base tube 48, and a thread head is arranged at the bottom of the bracket slide 47 to match the internal thread of the base tube 48. The bracket slide 47 is screwed into the base tube 48 sleeved at the bottom, and two bracket slides 47 are connected to the two sides of the support 46, respectively. Two upper and lower seat holes for supporting the fixing rod 44 are opened on the plate surface of the support 46. The bracket slide 47 is rotated, and the bracket slide moves up and down to adjust the height of the support 46. All limit balance modules 4 are fixed on the connecting rod 5 to ensure that the base height is consistent. A scale is set on the bracket slide 47 with an accuracy of 1mm to ensure that all front and rear limit balance modules are at the same height.

[0050] The water inlet air supply branch pipe 2 is connected to the aeration hose 3 through a full-pressure anti-detachment component 8. The full-pressure anti-detachment component is a device commonly used to prevent the connection pipe from detaching, and its internal structure and design ensure the firmness and sealing of the connection. Figure 5 As shown, the full-pressure anti-slip component 8 includes a pagoda joint 81, an elastic inner pagoda cone ring 82 and an outer cone sleeve 83. The pagoda joint 81 is a joint with a protruding top and an inner cavity. The protruding top of the pagoda joint 81 is connected to the water inlet air supply branch pipe 2, and the water inlet air supply branch pipe 2 is fixed together by threads. The elastic inner pagoda cone ring 82 is located in the inner cavity of the pagoda joint 81, has a cylindrical outer shape, and is made of a soft and elastic material such as rubber or elastic plastic. The elastic inner pagoda cone ring 82 and the cone sleeve of the water inlet air supply branch pipe 2 are mutually inserted to generate corresponding pressure, thereby ensuring the tightness and stability of the connection. The outer cone sleeve 83 is located outside the pagoda joint 81 and is inserted into the elastic inner pagoda cone ring 82. The shape of the outer cone sleeve 83 matches the inner cone ring 82 to ensure the safe connection of the pagoda joint 81. The outer cone sleeve 83 is connected to the aeration hose 3 by threads to ensure the stability of the entire connection.

[0051] When the isobaric aeration device of the present invention is in operation, the airflow from the water-inlet air supply branch pipe 2 is delivered to the aeration hose 3, which evenly and efficiently diffuses the air into the water body. At the same time, the installed aeration hose 3 can clean the pollutants on the surface and inner wall of the aeration tube by frequent venting and aeration to prevent micropore blockage. Figure 2As shown, the end of the aeration hose 3 is connected to a connecting rope 6 fixed on the ground at the rear side of the aeration tank 7. When the aeration hose 3 and its accessories are replaced, it is only necessary to open the detachable portion connecting the aeration hose 3 and the water inlet air supply branch pipe 2, and pull out the aeration hose 3 and its accessories from the upper end of the aeration tank 7 through the connecting rope 6 to replace them, and then pull the replaced aeration hose and its accessories into the tank, so that the damaged aeration hose and its accessories can be replaced without draining water or stopping air.

[0052] The installation and use method of the above-mentioned isobaric balanced aeration device comprises the following steps:

[0053] Step 1: Calculation of aeration hose pressure loss:

[0054] The flow rate of the water inlet air supply pipe v1=Q / (n1×A1), where Q is the design flow rate, n1 is the number of water inlet air supply pipes, and A1 is the area of ​​the water inlet air supply pipe;

[0055] The flow rate at the aeration pipe inlet is v2 = Q1 / (n2×A2), where Q1 is the design flow rate of a single water inlet air supply pipe, n2 is the number of aeration hoses connected to a single water inlet air supply pipe, and A2 is the area of ​​the aeration hose;

[0056] Calculate the inlet air pressure drop dp = 1 / 2 × ρ 空气 ×(v1 2 -v2 2 );

[0057] Calculate the pressure loss along the aeration hose ΔPm = Δpm × L, where Δpm represents the pressure loss along the aeration hose per meter, and L represents the length of the aeration hose;

[0058] Step 2: Install the limit balance module: Install the limit balance module based on the bottom surface of the flat pool, and rotate the bracket slide to make the top surface of the aeration hose in the same plane, with a flatness error within 1mm;

[0059] Step 3: Compensation and leveling: After all limit balance modules are leveled, Compensation: When pressure loss occurs locally, in order to ensure consistent air supply pressure, the height is increased through the limit balance module, and the height h of the pipeline from the water surface is reduced. By reducing the hydrostatic pressure, the pressure loss dp at the head end of the aeration hose and the pressure loss ΔPm at the end are compensated to achieve constant air supply pressure ΔP. The limit balance module is used to increase the height of the aeration inlet and the aeration end, and the linear difference compensation adjustment in the middle position is adjusted. After completion, the aeration hose is installed in a threaded manner.

[0060] Step 4: Water immersion test: After completing pipe connection, cleaning, sealing test and other tasks, fill the aeration tank with clean water. When the water level is 100mm higher than the highest position of the aeration pipe, test the aeration uniformity under the preset aeration volume conditions.

[0061] Example 1

[0062] The aeration tank size is 19.25×4×5.2m, and the layout is as follows: Figure 1 As shown. Design aeration volume 4m 3 / min. The main air pipe on the top of the pool is divided into three branches to the pressure-expanding and stabilizing pipe. Each pressure-expanding pipe opening is connected to three water-inlet air pipes and aeration pipes, a total of 9 aeration pipes, and a single aeration pipe is 17.6 meters long. The implementation steps are as follows:

[0063] The flow rate of a single water inlet air supply pipe is v1 = 3.75m / s; the flow rate of a single aeration pipe inlet is v2 = 3.77m / s, and the static drop dp at the inlet is 0.14Pa. The pressure loss along the aeration pipe is ΔPm = Δpm × L = 0.096Pa; the pool bottom is leveled, and the flatness error is within 10mm. The adjustable position balance module is installed based on the flat pool bottom surface. The top surface of the aeration hose is located in the same plane by adjusting the height of the bracket slide, and the flatness error is within 1mm; after all aeration balance modules are leveled, compensation adjustment is performed, the aeration inlet compensation is increased by 7mm, the aeration end is increased by 4.8mm, and the linear difference compensation adjustment is made to the middle position. After completion, the aeration hose is installed in a threaded manner; after completing the pipeline connection, cleaning, sealing test and other work, the biochemical pool is filled with clean water, and the water surface is 100mm higher than the highest position of the aeration pipe, and the aeration uniformity under the preset aeration volume condition is tested; sewage is connected for debugging and operation, and aeration is balanced.

[0064] Example 2

[0065] The aeration tank size is 21×5.5×6m, and the layout is as follows: Figure 1 As shown. Designed aeration volume 9m 3 / min. The main air pipe on the top of the pool is divided into three branches to the pressure-expanding and stabilizing pipe. Each pressure-expanding pipe opening is connected to four water-inlet air pipes and the aeration pipe. A single aeration pipe is 18 meters long and there are 12 of them. The implementation steps are as follows:

[0066] The flow rate of a single water inlet air supply pipe is v1=6.33m / s, the flow rate of the aeration pipe inlet is v=Q / A=6.37m / s, the static pressure drop of the inlet is dp=0.39Pa, and the pressure loss along the aeration pipe is ΔPm=Δpm*L=0.21Pa; the pool bottom is leveled, and the flatness error is within 10mm. The adjustable position balance module is installed based on the flat pool bottom surface. The top surface of the aeration hose is located in the same plane by adjusting the height of the bracket slide, and the flatness error is within 1mm; after all the aeration balance modules are leveled, the compensation adjustment The aeration inlet compensation is increased by 20mm, the aeration end is increased by 10mm, and the linear difference compensation is adjusted to the middle position. After completion, the high-efficiency aeration hose is installed in a threaded manner; after completing the pipeline connection, cleaning, sealing test and other work, the biochemical pool is filled with clean water. After the water surface is 100mm higher than the highest position of the aeration pipe, the uniformity of the aeration pipe under the preset aeration volume condition is tested. During the test, the aeration volume in the middle part is relatively high. After adjusting the position of the balance module in the middle position downward, re-test until the aeration is uniform; after entering the sewage, the commissioning runs well.

Claims

1. A method for installing and using a fully isobaric balanced aeration device, the fully isobaric balanced aeration device comprising a fully isobaric pressure-stabilizing gas distribution component (1) arranged on the ground in front of an aeration tank (7), the fully isobaric pressure-stabilizing gas distribution component (1) being connected to a blower, the fully isobaric pressure-stabilizing gas distribution component (1) being vertically connected downwardly to a plurality of vertical water inlet air supply branches (2), the water inlet air supply branches (2) being connected to an aeration hose (3) which is straight on the bottom surface of the aeration tank (7), the aeration hose (3) being fixed by a row of spaced-apart limit balance modules (4), the base of each limit balance module (4) being fixed on a connecting rod (5), wherein: The method for installing and using the device includes the following steps: Step 1: Calculation of aeration hose pressure loss: The flow rate of the water inlet air supply pipe v1=Q / (n1×A1), where Q is the design flow rate, n1 is the number of water inlet air supply pipes, and A1 is the area of ​​the water inlet air supply pipe; The flow rate at the aeration pipe inlet is v2 = Q1 / (n2×A2), where Q1 is the design flow rate of a single water inlet air supply pipe, n2 is the number of aeration hoses connected to a single water inlet air supply pipe, and A2 is the area of ​​the aeration hose; Calculate the inlet air pressure drop dp = 1 / 2 × ρ 空气 ×(v1 2 -v2 2 ); Calculate the pressure loss along the aeration hose ΔPm = Δpm × L, where Δpm represents the pressure loss along the aeration hose per meter, and L represents the length of the aeration hose; Step 2: Install the limit balance module: Install the limit balance module based on the bottom surface of the flat pool, and rotate the bracket slide to make the top surface of the aeration hose in the same plane, with a flatness error within 1mm; Step 3: Compensation and leveling: After all limit balance modules are leveled, ρ1 represents the density of air, v represents the velocity of gas, ρ2 represents the density of sewage, g represents the acceleration of gravity, and h represents the depth of the aeration hose from the water surface; the height is increased by the limit balance module, and the height h of the pipe from the water surface is reduced. By reducing the hydrostatic pressure, the pressure loss dp at the head end of the aeration hose and the pressure loss ΔPm at the end are compensated to achieve the constant air supply pressure ΔP; the limit balance module is used to increase the height of the aeration inlet and the aeration end, and the linear difference compensation adjustment in the middle position is adjusted. After completion, the aeration hose is installed in a threaded manner; Step 4: Water immersion test: After completing the pipeline connection, cleaning, and sealing test, fill the aeration tank with clean water. When the water level is 100mm higher than the highest position of the aeration pipe, test the aeration uniformity under the preset aeration volume conditions.

2. The installation and use method of the isobaric balanced aeration device according to claim 1 is characterized by: The position limiting equalizing module (4) comprises a lifting mechanism (43), a fixing rod (44), a guide wheel (41) and a back-facing U-shaped locking buckle (42); the guide wheel (41) is sleeved on the fixing rod (44) and is locked in place by the back-facing U-shaped locking buckle (42); the two ends of the upper and lower fixing rods (44) are respectively sleeved in the upper and lower seat holes of the lifting mechanisms (43) on both sides; the concave surfaces of the two guide wheels (41) corresponding to the upper and lower fixing rods (44) form a central hole groove (45).

3. The installation and use method of the isobaric balanced aeration device according to claim 2 is characterized by: The lifting mechanism (43) comprises a base tube (48), a support slide tube (47) and a support (46); an internal thread for adjusting the height is arranged inside the base tube (48), a thread head matching with the internal thread of the base tube (48) is arranged at the lower part of the support slide tube (47), the support slide tube (47) is screwed into the base tube (48) sleeved at the lower part, two support slide tubes (47) are respectively connected on both sides of the support (46), and two upper and lower seat holes for supporting and fixing rods (44) are opened on the plate surface of the support (46).

4. The installation and use method of the isobaric balanced aeration device according to claim 3 is characterized by: The support slide cylinder (47) is provided with a scale with an accuracy of 1 mm.

5. The method for installing and using the isobaric balanced aeration device according to any one of claims 1 to 4, characterized in that: The water inlet air supply branch pipe (2) is connected to the aeration hose (3) via a full-pressure anti-detachment component (8), and the end of the aeration hose (3) is connected to a connection rope (6) fixed on the ground at the rear side of the aeration tank (7).

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