Efficient anti-blocking double-spiral-flow aerator and hoisting aeration equipment

Abstract

The invention belongs to the technical field of sewage treatment aerators, and particularly discloses an efficient anti-clogging double-rotational-flow aerator and a hoisting aeration device.The double-rotational-flow aerator comprises a barrel and an air inlet pipe, a turbulence generator is arranged in the barrel, a plurality of sets of upper rotational-flow spray pipes are arranged outside an upper rotational-flow guide cover at the upper end of the barrel, and the upper rotational-flow guide cover is provided with a plurality of sets of lower rotational-flow spray pipes; the bottom of a lower rotation flow guide cover at the lower end of the barrel is open, a plurality of lower rotational flow spraying pipes are arranged in the lower rotation flow guide cover, an air inlet pipe sequentially penetrates through the upper rotation flow guide cover and the barrel from top to bottom and is communicated with all the lower rotational flow spraying pipes, and the spiral spraying direction of all the lower rotational flow spraying pipes is consistent with the inclined spraying direction of all the upper rotational flow spraying pipes. According to the aerator disclosed by the invention, the upper rotational flow spray pipe and the lower rotational flow spray pipe are respectively arranged on the upper flow guide cover and the lower flow guide cover to form a double-rotational-flow structure, and the turbulent flow generator is arranged in the barrel, so that the aerator not only prevents blockage, but also can efficiently aerate. The hoisting aeration equipment comprises an air blower and an aerator, and the aerator is hoisted in the aeration tank by the hoisting aeration equipment through an aeration air pipe, so that the maintenance is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of aerators for high-concentration and high-calcium sewage treatment, and in particular relates to a high-efficiency anti-clogging double-cyclone aerator and a hoisting aeration device. Background Art

[0002] Aerator is an important equipment in the activated sludge process. It is a key device to provide the required dissolved oxygen (aerobic microorganisms consume oxygen to degrade organic matter) to the biochemical sewage treatment process, ensure the sewage is fully mixed, and suspend the activated sludge. Its performance not only affects the sewage treatment effect, but also directly affects the investment and operating costs of sewage treatment facilities.

[0003] The existing aerators mainly include: perforated tube aerator, umbrella aerator, microporous aerator, jet aerator, cyclone aerator, etc. Among them, perforated tube aerator, umbrella aerator, microporous aerator and jet aerator generally have the following problems: (1) uneven aeration, sudden aeration or aeration dead zone; (2) low dissolved oxygen efficiency, small water treatment volume, high energy consumption; (3) the aerator is easy to be damaged or blocked, and cannot be repaired or replaced online; (4) sludge accumulates at the bottom of the aerobic pool, especially in high-concentration and high-calcium sewage, the aerator is easy to scale and clog. The existing cyclone aerator, due to its large channel design, is not easy to be clogged, but it only relies on the protrusions in the aerator cylinder to cut the incoming air, the bubbles are large, and there is a defect of low oxygen transfer efficiency; and the air is directly released to the water surface after passing through the aerator cylinder, and the bubble stays in the pool for a short time, further reducing the oxygen utilization rate.

[0004] In addition, the existing aerators are generally fixedly installed at the bottom of the aeration tank, which is inconvenient to maintain. When the aerator needs to be maintained or replaced, the aeration tank needs to be emptied, which can easily affect the normal operation of the biochemical system.

[0005] Therefore, the inventor is committed to designing an aerator and an aeration device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a high-efficiency anti-clogging double-cyclone aerator, which not only aerates evenly, but also prevents sludge accumulation at the bottom of the pool, enhances the mud-water mixing effect, prolongs the bubble residence time, and improves the dissolved oxygen efficiency. Even in high-concentration and high-calcium sewage, it is not easy to scale and clog.

[0007] Another object of the present invention is to provide a hoisting aeration device that can be repaired or replaced online, is convenient for maintenance, and will not affect the normal operation of the biochemical system.

[0008] In order to achieve the above object, a technical solution adopted by the present invention is:

[0009] A high-efficiency anti-clogging double-swirl aerator comprises a cylinder and an air inlet pipe, wherein a multi-layer turbulence generator is arranged on the inner wall of the cylinder, an upper end of the cylinder is connected to an upward swirl guide cover, and an outer wall of the upper swirl guide cover is provided with a plurality of upper swirl nozzles for guiding the fluid in the upper swirl guide cover, and a lower end of the cylinder is connected to a downward swirl guide cover, the bottom of the downward swirl guide cover is open and a plurality of downward swirl nozzles are arranged inside the downward swirl guide cover, the air inlet pipe passes through the upward swirl guide cover and the cylinder in sequence from top to bottom and is connected to all the downward swirl nozzles, and the spiral injection direction of all the downward swirl nozzles is consistent with the inclined injection direction of all the upper swirl nozzles.

[0010] As an improvement of the high-efficiency anti-clogging double-cyclone aerator of the present invention, all the lower cyclone nozzles are dispersedly arranged around the air inlet pipe and have the same spray direction, and each lower cyclone nozzle rises in a spiral path along the inner wall of the lower cyclone guide cover.

[0011] As an improvement of the high-efficiency anti-clogging double-cyclone aerator of the present invention, the spiral rising angle of the lower cyclone nozzle is 10° to 45°, and the number of spiral turns is 0.25 to 0.75 turns.

[0012] As an improvement of the high-efficiency anti-clogging double-cyclone aerator of the present invention, the side wall of the downward cyclone guide cover is inclined to form a positive conical cylinder, and the inclination angle of the side wall of the downward cyclone guide cover is 15° to 60°.

[0013] As an improvement of the high-efficiency anti-clogging double-swirl aerator of the present invention, the bottom of the air inlet pipe is connected to all the lower swirl nozzles through a diverter pipe.

[0014] As an improvement of the high-efficiency anti-clogging double-cyclone aerator of the present invention, the barrel is in a cylindrical shape, and the turbulence generators in the same layer are arranged in a ring-shaped interval around the air inlet pipe.

[0015] As an improvement of the high-efficiency anti-clogging double-cyclone aerator of the present invention, the side wall of the upward cyclone guide cover is inclined to form an inverted cone-shaped cylinder, and the inclination angle of the side wall of the upward cyclone guide cover is 10° to 45°.

[0016] As an improvement of the high-efficiency anti-clogging double-cyclone aerator of the present invention, each of the upper cyclone nozzles gradually narrows along its outlet direction and its downward inclination angle is 10° to 45°, and each group of the upper cyclone nozzles is arranged in a ring around the upper cyclone guide cover and has the same spray direction.

[0017] In order to achieve the above another object, a technical solution adopted by the present invention is:

[0018] A hanging aeration equipment comprises a blower and the above-mentioned efficient anti-clogging double cyclone aerator, the air inlet pipe is connected to an aeration air duct for hanging the efficient anti-clogging double cyclone aerator in an aeration tank, and the main air duct of the blower is connected to the aeration air duct.

[0019] As an improvement of the hoisting aeration equipment of the present invention, the number of the high-efficiency anti-clogging dual-cyclone aerators and the aeration air ducts are both multiple and arranged in one-to-one correspondence, the main air duct is connected to all the aeration air ducts through a branch pipe, the branch pipe is provided with a main valve, and each of the aeration air ducts is provided with a flange ball valve at the part outside the water surface of the aeration tank, and the high-efficiency anti-clogging dual-cyclone aerator is made of stainless steel.

[0020] Compared with the prior art, the high-efficiency anti-clogging double-cyclone aerator of the present invention forms a double-cyclone structure by arranging a lower cyclone nozzle inside the lower cyclone guide cover at the lower end of the cylinder, and arranging an upper cyclone nozzle outside the upper cyclone guide cover at the upper end of the cylinder, and a turbulence generator is arranged on the inner wall of the cylinder, so that the air entering from the air inlet pipe is first rotated out through the lower cyclone nozzle to stir the sludge and sewage, and the generated mixed fluid rotates in the lower cyclone guide cover and rises to the cylinder, the turbulence generator causes the mixed fluid to generate turbulence, and then rotates into the upper cyclone guide cover, the flow state changes to generate turbulence, and finally is ejected from the upper cyclone nozzle to the outside of the aerator, stirring the sludge at the bottom of the pool and prolonging the residence time of the bubbles in the pool. The entire aerator not only aerates evenly, but also prevents the accumulation of sludge at the bottom of the pool, strengthens the mud-water mixing effect, prolongs the residence time of the bubbles, and improves the dissolved oxygen efficiency. Even in high-concentration and high-calcium sewage, it is not easy to scale and clog.

[0021] Compared with the prior art, the hoisting aeration equipment of the present invention utilizes an aeration air duct to suspend a high-efficiency anti-clogging double-cyclone aerator with the properties of uniform aeration, not easy to scale and clog, and high dissolved oxygen efficiency in an aeration tank. It can be inspected or replaced online, which is convenient for maintenance and will not affect the normal operation of the biochemical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic enlarged view of the three-dimensional structure of the high-efficiency anti-clogging double cyclone aerator of the present invention;

[0023] Figure 2 It is another three-dimensional structure schematic enlarged diagram of the high-efficiency anti-clogging double cyclone aerator of the present invention;

[0024] Figure 3 It is a schematic enlarged cross-sectional view of the high-efficiency anti-clogging double cyclone aerator of the present invention;

[0025] Figure 4 It is another schematic enlarged cross-sectional view of the structure of the high-efficiency anti-clogging double cyclone aerator of the present invention;

[0026] Figure 5 It is a three-dimensional enlarged view of the air intake pipe and two lower swirl nozzles of the present invention;

[0027] Figure 6 It is a schematic diagram of the installation structure of the hoisting aeration equipment of the present invention.

[0028] Illustration Description:

[0029] 1. Cylinder; 11. Downward swirl guide cover; 12. Upward swirl guide cover; 2. Upward swirl nozzle; 21. Upward swirl nozzle; 3. Air inlet pipe; 31. Diverter pipe; 4. Downward swirl nozzle; 41. Downward swirl nozzle; 5. Turbulence generator; 6. Double swirl aerator; 7. Main air duct; 71. Branch pipe; 711. Main valve; 72. Aeration air duct; 721. Flange ball valve; 8. Aeration tank; 81. Tank bottom; 82. Water surface. DETAILED DESCRIPTION

[0030] The following specifically describes the implementation modes of the present invention in conjunction with the accompanying drawings. The accompanying drawings are only for reference and illustration and do not constitute a limitation on the scope of patent protection of the present invention.

[0031] Reference Figures 1 to 5 A high-efficiency anti-clogging double-cyclone aerator 6 includes a cylinder 1 and an air inlet pipe 3. The upper end of the cylinder 1 is connected to an upper cyclone guide cover 12. The outer wall of the upper cyclone guide cover 12 is provided with a plurality of upper cyclone nozzles 2 for guiding the fluid in the upper cyclone guide cover 12. The lower end of the cylinder 1 is connected to a lower cyclone guide cover 11. The bottom of the lower cyclone guide cover 11 is open and a plurality of lower cyclone nozzles 4 are provided therein. The air inlet pipe 3 passes through the upper cyclone guide cover 12 and the cylinder 1 in sequence from top to bottom and is connected to all the lower cyclone nozzles 4.

[0032] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The barrel 1, the upper swirl air deflector 12 and the lower swirl air deflector 11 are coaxially arranged and interconnected. The barrel 1 is located between the upper swirl air deflector 12 and the lower swirl air deflector 11. The barrel 1 is cylindrical. The side wall of the lower swirl air deflector 11 is inclined to form a positive conical barrel. The side wall of the lower swirl air deflector 11 has an inclination angle of 15° to 60°. The side wall of the upper swirl air deflector 12 is inclined to form an inverted conical barrel. The side wall of the upper swirl air deflector 12 has an inclination angle of 10° to 45°. Each upper swirl nozzle 2 gradually narrows along its outlet direction and its downward inclination angle is 10° to 45°. Each group of upper swirl nozzles 2 is arranged in a ring around the upper swirl air deflector 12 and has the same spray direction. An upper swirl nozzle 21 is provided at the end of each upper swirl nozzle 2.

[0033] Reference Figure 3A plurality of turbulence generators 5 are arranged on the inner wall of the cylinder 1. The same group of turbulence generators 5 are arranged in a ring-shaped interval around the intake pipe 3. The turbulence generators 5 have a special curved surface structure and are distributed in multiple layers along the circumference of the cylinder 1. 4 to 8 layers of turbulence generators 5 can be arranged in the cylinder 1, and 4 to 8 turbulence generators 5 are arranged in each layer. The turbulence generators 5 are mainly used to generate turbulence (turbulence is a complex and irregular fluid motion state, which is characterized by randomness and pulsation of physical quantities such as fluid velocity and pressure in time and space).

[0034] Reference Figure 2 , Figure 3 and Figure 5 The number of the lower swirl nozzles 4 is preferably two, and a lower swirl nozzle 41 is provided at the end of each lower swirl nozzle 4. The upper end of the air inlet pipe 3 extends vertically from the top surface of the upper swirl guide cover 12 to the outside of the upper swirl guide cover 12. The bottom of the air inlet pipe 3 is connected to the two lower swirl nozzles 4 through a branch pipe 31. The air inlet pipe 3 is vertically connected to the branch pipe 31 to form a T shape. The two lower swirl nozzles 4 are respectively located at the two ends of the branch pipe 31. All the lower swirl nozzles 4 are dispersed around the air inlet pipe 3. The lower swirl nozzles 4 are arranged in a manner and have the same spray direction. Each lower swirl nozzle 4 rises in a spiral path along the inner wall of the lower swirl guide cover 11. The spiral rising angle of the lower swirl nozzle 4 is 10° to 45°, and the number of spiral turns is 0.25 to 0.75 turns. In this embodiment, the spiral spray direction of all the lower swirl nozzles 4 is consistent with the inclined spray direction of all the upper swirl nozzles 2 (for example, the spiral spray direction of the lower swirl nozzle 4 and the inclined spray direction of the upper swirl nozzle 2 are both counterclockwise, such as Figure 2 structure shown).

[0035] Reference Figures 1 to 5 The working principle of the high-efficiency anti-clogging double cyclone aerator 6 of the present invention is:

[0036] The external air enters the diverter pipe 31 from the upper end of the air inlet pipe 3, enters the two lower swirl nozzles 4 after being diverted by the diverter pipe 31, and is then released from the lower swirl nozzles 41 of the two lower swirl nozzles 4, and makes a spiral upward motion along the inner wall of the lower swirl guide cover 11 in the lower swirl guide cover 11, and stirs and mixes the sewage and sludge, so that the mud, water and air mixed fluid rotates strongly in the lower swirl guide cover 11 and enters the cylinder 1;

[0037] The mud, water and air mixed fluid rotates strongly in the cylinder 1 and is repeatedly cut by the turbulence generator 5. When the mixed fluid is cut by the turbulence generator 5, the special curved surface structure on the surface of the turbulence generator 5 causes a large amount of turbulence in the mixed fluid, so that the mud, water and air are further refined and mixed, and the oxygen transfer efficiency is enhanced;

[0038] After being cut by the turbulence generator 5, the mixed fluid rotates and rises from the cylinder 1 into the upward rotating guide cover 12 with a larger cross-sectional area. At this time, the fluid morphology changes, generating further turbulence and enhancing the oxygen transfer efficiency.

[0039] The mixed fluid continues to rotate strongly in the upper swirl guide cover 12 and enters the upper swirl nozzle 2. The upper swirl nozzle 21 of the upper swirl nozzle 2 sprays obliquely downward to stir up the sludge on the bottom 81 of the pool, and prolong the residence time of the air in the pool, thereby enhancing the oxygen transfer efficiency.

[0040] The high-efficiency anti-clogging double cyclone aerator 6 of the present invention, the air entering the air inlet pipe 3 rotates out through the lower cyclone nozzle 4, stirs the sludge and sewage, and the generated mixed fluid rotates and rises in the lower cyclone guide cover 11 to the cylinder 1, and then the strongly rotating mixed fluid cuts the turbulence generator 5. The irregular curved surface structure of the turbulence generator 5 causes the mixed fluid to generate turbulence, and produces a strong mud, water, and air mixing effect. After passing through the cylinder 1, the mixed fluid rotates into the upper cyclone guide cover 12, the flow state changes to generate turbulence, and then rotates along the upper cyclone guide cover 12 to the upper cyclone nozzle 2 to be sprayed and released outside the aerator, stirring the sludge at the bottom of the pool 81 and prolonging the residence time of the bubbles in the pool.

[0041] Compared with the commonly used aerators and cyclone aerators, the high-efficiency anti-clogging double cyclone aerator 6 of the present invention has the following advantages:

[0042] ①. The strong vortex of mud, water and gas generated inside the aerator can produce a self-purification effect, and will not cause adverse effects even if it is operated intermittently;

[0043] ② The upper end of the aerator forms a mud, water and gas jet effect, which does not require an additional jet pump, thereby improving oxygen utilization and reducing energy consumption;

[0044] ③. Combining the advantages of swirl and jet aeration, the aerator uses a special curved surface structure unit to generate turbulence, with high oxygen utilization, low energy consumption and large service area;

[0045] ④. The large channel design has large ventilation volume, the aerator is not easy to be blocked and scaled, and the dissolved oxygen performance does not decay after long-term use; the pressure loss is low, and long-term operation is beneficial to fan energy saving;

[0046] ⑤. A downward rotating guide cover 11 is used at the bottom of the aerator to suck the sludge at the bottom of the pool 81 under the action of air lift, and the angled jet flow at the top of the aerator also flushes the sludge at the bottom of the pool 81, so there is no sludge deposition in the aerobic pool;

[0047] ⑥ The entire high-efficiency anti-clogging double cyclone aerator 6 is made of stainless steel, which is durable and not easy to wear or age.

[0048] Reference Figure 6A hanging aeration equipment includes a blower and a high-efficiency anti-clogging double cyclone aerator 6. The air inlet pipe 3 is connected to an aeration air duct 72 for hanging the high-efficiency anti-clogging double cyclone aerator 6 in an aeration tank 8. The blower is located outside the aeration tank 8 and its main air duct 7 is connected to the aeration air duct 72.

[0049] Reference Figure 6 In the present invention, the number of the high-efficiency anti-clogging dual-cyclone aerators 6 and the aeration air ducts 72 are both multiple and arranged one by one. The main air duct 7 is connected to all the aeration air ducts 72 through the branch pipe 71. A main valve 711 is provided on the branch pipe 71. Each aeration air duct 72 is provided with a flange ball valve 721 at the part outside the water surface 82 of the aeration tank 8. The entire high-efficiency anti-clogging dual-cyclone aerator 6 is made of stainless steel.

[0050] The working principle of the hoisting aeration equipment of the present invention is as follows: the air output by the blower enters the branch pipe 71 from the main air duct 7, and then is diverted by the branch pipe 71 into each aeration air duct 72, and then enters the air inlet pipe 3 of the high-efficiency anti-clogging double cyclone aerator 6, and passes through the lower cyclone nozzle 4, the lower cyclone guide cover 11, the cylinder 1, and the upper cyclone guide cover 12 of the high-efficiency anti-clogging double cyclone aerator 6 in sequence, and finally sprayed obliquely downward from the upper cyclone nozzle 2 of the high-efficiency anti-clogging double cyclone aerator 6 to the bottom 81 of the aeration tank 8, stirring the sludge on the bottom 81 of the tank.

[0051] Reference Figure 6 The hanging aeration equipment of the present invention is installed and used in a hanging manner, and this installation method is convenient for maintenance: when it is necessary to clean and maintain the high-efficiency anti-clogging dual-cyclone aerator 6, it is only necessary to close the flange ball valve 721 of the aeration air duct 72 located above the water surface 82, and remove the flange at the lower end of the flange ball valve 721, so that the aeration air duct 72 and the high-efficiency anti-clogging dual-cyclone aerator 6 can be pulled to the pool surface. This installation method can avoid the disadvantage of the common aeration tank being fixedly installed on the pool bottom 81. When the aerator needs to be maintained or replaced, even if the aeration tank is not emptied, the normal operation of the biochemical system will not be affected.

[0052] The hanging aeration equipment of the present invention is installed in a hanging manner, can be technically modified online, and can clean and maintain the aerator online without cleaning the pool and draining the water, and does not affect the normal operation of the aerobic system.

[0053] The above disclosure is only a preferred embodiment of the present invention, which cannot be used to limit the scope of protection of the present invention. Therefore, equivalent changes made within the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A high-efficiency anti-clogging double-cyclone aerator, comprising a cylinder and an air inlet pipe, characterized in that: A multi-layer turbulence generator is provided on the inner wall of the cylinder, an upper end of the cylinder is connected to an upward swirl guide cover, an outer wall of the upper swirl guide cover is provided with a plurality of upper swirl flow nozzles for discharging the fluid in the upper swirl guide cover, a lower end of the cylinder is connected to a downward swirl guide cover, the bottom of the downward swirl guide cover is open and a plurality of downward swirl flow nozzles are provided inside the downward swirl flow nozzles, the air inlet pipe passes through the upward swirl guide cover and the cylinder in sequence from top to bottom and is connected to all the downward swirl flow nozzles, and the spiral injection direction of all the downward swirl flow nozzles is consistent with the inclined injection direction of all the upper swirl flow nozzles.

2. The high-efficiency anti-clogging double cyclone aerator according to claim 1 is characterized in that: All the downward swirl nozzles are dispersedly arranged around the air inlet pipe and have the same spray direction. Each downward swirl nozzle rises in a spiral path along the inner wall of the downward swirl guide cover.

3. The high-efficiency anti-clogging double cyclone aerator according to claim 1 is characterized in that: The spiral rising angle of the lower swirl nozzle is 10° to 45°, and the number of spiral turns is 0.25 to 0.75 turns.

4. The high-efficiency anti-clogging double cyclone aerator according to claim 1 is characterized in that: The side wall of the downward rotating air deflector is tilted to form a positive conical cylinder, and the tilt angle of the side wall of the downward rotating air deflector is 15° to 60°.

5. The high-efficiency anti-clogging double cyclone aerator according to claim 1 is characterized in that: The bottom of the air inlet pipe is communicated with all the lower swirl nozzles through a diverter pipe.

6. The high-efficiency anti-clogging double cyclone aerator according to claim 1, characterized in that: The cylinder is in the shape of a cylinder, and the turbulence generators in the same layer are arranged in a ring shape around the air intake pipe.

7. The high-efficiency anti-clogging double cyclone aerator according to claim 1, characterized in that: The side wall of the upward rotating air deflector is tilted to form an inverted cone-shaped cylinder, and the tilt angle of the side wall of the upward rotating air deflector is 10° to 45°.

8. The high-efficiency anti-clogging double cyclone aerator according to claim 1, characterized in that: Each of the upper swirl flow nozzles gradually narrows along its outlet direction and its downward inclination angle is 10° to 45°. Each group of the upper swirl flow nozzles is arranged in a ring shape around the upper swirl guide cover and has the same spray direction.

9. A hanging aeration device, characterized in that: It comprises a blower and a high-efficiency anti-clogging dual-cyclone aerator as described in any one of claims 1 to 8, the air inlet pipe is connected to an aeration duct for hanging the high-efficiency anti-clogging dual-cyclone aerator in an aeration tank, and the main air duct of the blower is connected to the aeration duct.

10. The hanging aeration equipment according to claim 9, characterized in that: The number of the high-efficiency anti-clogging dual-cyclone aerators and the aeration air ducts are both multiple and arranged in one-to-one correspondence. The main air duct is connected to all the aeration air ducts through a branch pipe, and a main valve is provided on the branch pipe. Each aeration air duct is provided with a flange ball valve at the part outside the water surface of the aeration tank. The high-efficiency anti-clogging dual-cyclone aerator is made of stainless steel.

Images