Magnetic suspension centrifugal blower for sewage treatment

Abstract

The application provides a magnetic suspension centrifugal blower for sewage treatment, and relates to the field of blowers, which comprises a mounting base, a main machine cylinder, a first air inlet, a second air outlet, an anti-backflow pipeline, an anti-backflow drive box, a filtering protection mechanism and an anti-backflow driving mechanism; the main machine cylinder is fixedly connected in front of the mounting base; the first air inlet is fixedly connected to the left side of a primary volute; the second air inlet is fixedly connected to the right side of a secondary volute; the second air outlet is fixedly connected in front of the secondary volute; the anti-backflow drive box is fixedly connected above the anti-backflow pipeline; the filtering protection mechanism is arranged outside the mounting base; and the anti-backflow driving mechanism is arranged inside the anti-backflow drive box, so that the service life of the whole machine is effectively prolonged, the problem that sewage in the existing aeration tank is prone to reverse flow along the aeration pipe network, forms sewage backflow, and the invading sewage can cause corrosion and scaling of the impeller and the volute flow channel is solved.

Description

Technical Field

[0001] This invention relates to the field of blower technology, and in particular to a magnetic levitation centrifugal blower for sewage treatment. Background Technology

[0002] The magnetic levitation centrifugal blower is a new generation of high-efficiency and energy-saving fluid machinery integrating active magnetic levitation bearings, high-speed permanent magnet synchronous motors, three-dimensional flow centrifugal pneumatics, and intelligent frequency conversion control technology. It is a core aeration equipment in the wastewater treatment field. This equipment achieves contactless levitation operation of the rotor across the entire speed range through electromagnetic closed-loop control of the magnetic levitation bearing system, coupled with real-time feedback of the rotor position from a micron-level displacement sensor and dynamic adjustment of the magnetic field force. This fundamentally eliminates the mechanical friction loss and lubrication system of traditional blowers. The motor rotor and centrifugal impeller are coaxially and directly connected, and the operation is controlled by a frequency converter. High-frequency drive enables high-speed rotation. Air is accelerated by the impeller and diffused by the volute to convert kinetic energy into static pressure energy, outputting stable clean compressed air. In wastewater treatment processes, this equipment mainly provides aeration and oxygen supply for the aerobic microbial community in the biochemical treatment unit. It can accurately match the changes in aeration demand caused by fluctuations in the quality and quantity of wastewater influent through stepless frequency conversion speed regulation. With its characteristics of oil-free clean air supply, high efficiency and energy saving, low noise and long service life, it has become the mainstream equipment for new construction and energy-saving renovation of municipal and industrial wastewater treatment projects, and is widely compatible with various activated sludge wastewater treatment processes.

[0003] The existing publication number CN113027820B discloses an air-cooling system and method for a magnetic levitation centrifugal blower, including a volute, an impeller, a housing, a rear cover of the housing, a rotor assembly, a motor stator, and a magnetic levitation stator assembly. The front end of the housing is connected to the volute, and the rear end is provided with the rear cover. The impeller is located inside the volute. The front end of the rotor assembly is coaxially connected to the impeller. An air outlet is provided on the front side wall of the housing. A through hole with both ends communicating is provided at the center of the rotor assembly. The rear end of the through hole communicates with the inner cavity of the rear cover of the housing. Both the motor stator and the magnetic levitation stator assembly have interconnected ventilation holes, which communicate with the air outlet on the front side wall of the housing. This air-cooling system and method eliminates the need for external heat dissipation equipment, water-cooled pipes, or heat exchangers, transforming passive external heat dissipation into active internal heat dissipation. This improves the heat dissipation efficiency of the motor rotor while reducing heat dissipation costs. The heat dissipation system is maintenance-free and highly reliable.

[0004] However, in practical applications, when existing magnetic levitation centrifugal blowers are shut down normally or suddenly by power failure, the air supply pressure in the aeration pipes disappears rapidly. Wastewater in the aeration tank is prone to backflow along the aeration network, resulting in backflow. This backflowing wastewater directly enters the main unit of the magnetic levitation centrifugal blower. The blower integrates high-precision magnetic levitation bearing assemblies, high-speed permanent magnet synchronous motors, and three-dimensional centrifugal impellers, among other precision core components. These components have extremely high requirements for media cleanliness and corrosion resistance. The intruding wastewater corrodes and scales the impeller and volute flow channels, and also penetrates the magnetic levitation bearing cavity and motor stator windings, causing bearing suspension accuracy failure, motor insulation damage, and corrosion of core rotating components, thus affecting the service life of the magnetic levitation centrifugal blower. Summary of the Invention

[0005] In view of this, the present invention provides a magnetic levitation centrifugal blower for sewage treatment. It effectively avoids unplanned shutdowns caused by blower backflow failures, ensures the continuous and stable operation of the sewage treatment aeration system, avoids the risk of substandard effluent quality due to aeration interruptions, prevents corrosion damage to the blower's core precision components caused by backflowing sewage, and effectively extends the overall service life of the machine. The multi-stage air intake pretreatment mechanism, composed of an air-water separator, a primary filter, and a medium-efficiency filter, effectively separates water vapor and intercepts impurities of different particle sizes, preventing wear and corrosion of the blower's internal components and precision parts caused by the humid environment and particulate impurities in the sewage treatment plant, thus extending the equipment's service life. The external protective shell, anti-condensation components, and noise reduction components respectively achieve physical protection, anti-condensation protection, and noise reduction effects, improving the equipment's adaptability and operational safety under harsh sewage treatment conditions. The overall structural layout is reasonable, the air path is smooth, and it can stably output high-pressure gas to meet aeration requirements, ensuring the continuous and reliable operation of the sewage treatment system.

[0006] This invention provides a magnetic levitation centrifugal blower for wastewater treatment, specifically including a mounting base, a main body cylinder, a primary volute, a secondary volute, a first air inlet, a first air outlet, a second air inlet, a second air outlet, an anti-backflow pipe, an anti-backflow drive box, a filter protection mechanism, and an anti-backflow drive mechanism. The main body cylinder is fixedly connected to the front of the mounting base; the primary volute is fixedly connected to the left side of the main body cylinder; the secondary volute is fixedly connected to the right side of the main body cylinder; the first air inlet is fixedly connected to the left side of the primary volute; the first air outlet is fixedly connected to the front of the primary volute; the second air inlet is fixedly connected to the right side of the secondary volute, and the second air inlet is connected to the first air outlet via a pipe; the second air outlet is fixedly connected to the front of the secondary volute; the anti-backflow pipe is fixedly connected to the front of the second air outlet, and an aeration pipe is connected to the outside of the anti-backflow pipe; the anti-backflow drive box is fixedly connected above the anti-backflow pipe; the filter protection mechanism is disposed on the outside of the mounting base; and the anti-backflow drive mechanism is disposed inside the anti-backflow drive box.

[0007] Furthermore, the filtration and protection mechanism includes an air-water separator; the air-water separator is located on the left side of the main body cylinder, and the air inlet of the air-water separator is connected to an external air source.

[0008] Furthermore, the filtration and protection mechanism also includes a pre-filter and a medium-efficiency filter; the air inlet of the pre-filter is connected to the air outlet of the air-water separator; the air inlet of the medium-efficiency filter is connected to the air outlet of the pre-filter, and the air outlet of the medium-efficiency filter is connected to the first air inlet.

[0009] Furthermore, the filter protection mechanism also includes: a protective shell and an anti-condensation component; the protective shell is provided in two sets, and the two sets of protective shells are respectively fixedly connected to the left and right sides of the mounting base, and the two sets of protective shells are respectively set on the outside of the first-stage volute and the second-stage volute; the anti-condensation component is provided in two sets, and the two sets of anti-condensation components are both electric heating plate structures with temperature controllers, and the two sets of anti-condensation components are respectively fixedly connected to the outside of the protective shell.

[0010] Furthermore, the filter protection mechanism also includes: a noise-reducing component; the noise-reducing component is provided in two sets, both sets of noise-reducing components are arc-shaped noise-reducing sponge structures, the two sets of noise-reducing components are respectively pasted on the inner side of the protective shell, and the inner side of the two sets of noise-reducing components is in contact with the primary volute and the secondary volute respectively.

[0011] Furthermore, the anti-backflow drive mechanism includes: a pressure relief pipe and a three-way ball valve; the pressure relief pipe is fixedly connected to the outside of the anti-backflow pipe, one end of the pressure relief pipe is connected to the anti-backflow pipe, and the other end of the pressure relief pipe is connected to an external exhaust gas pipe; the three-way ball valve is rotatably connected to the inside of the anti-backflow pipe.

[0012] Furthermore, the anti-backflow drive mechanism also includes: an anti-backflow drive worm gear and an anti-backflow drive worm; the anti-backflow drive worm gear is rotatably connected inside the anti-backflow drive housing, and the anti-backflow drive worm gear is coaxially and fixedly connected to the rotating shaft of the three-way ball valve; the anti-backflow drive worm is rotatably connected inside the anti-backflow drive housing, and the anti-backflow drive worm meshes with the anti-backflow drive worm gear.

[0013] Furthermore, the anti-backflow drive mechanism also includes an anti-backflow drive gear and an anti-backflow drive rack; the anti-backflow drive gear is coaxially and fixedly connected to the front end of the anti-backflow drive worm; the anti-backflow drive rack is slidably connected inside the anti-backflow drive housing, and the anti-backflow drive rack meshes with the anti-backflow drive gear.

[0014] Furthermore, the anti-backflow drive mechanism also includes: an anti-backflow drive component and an anti-backflow drive magnetic block; the anti-backflow drive component is an electromagnet structure, the circuit of the anti-backflow drive component is connected in series with the opening and closing circuit of the magnetic levitation centrifugal blower, and the anti-backflow drive component is fixedly connected inside the anti-backflow drive box; the anti-backflow drive magnetic block is fixedly connected above the anti-backflow drive rack, and the anti-backflow drive magnetic block is magnetically connected to the anti-backflow drive component.

[0015] Furthermore, the anti-backflow drive mechanism also includes an anti-backflow spring; one end of the anti-backflow spring is fixedly connected to the anti-backflow drive rack, and the other end of the anti-backflow spring is fixedly connected to the anti-backflow drive box.

[0016] Beneficial effects

[0017] This invention, through the setting of a filtration and protection mechanism, employs a multi-stage air intake pretreatment system consisting of an air-water separator, a pre-filter, and a medium-efficiency filter. This system effectively separates water vapor and intercepts impurities of different particle sizes, preventing wear and corrosion of the blower's internal precision components caused by the humid environment and particulate impurities in the sewage treatment plant, thus extending the equipment's service life. The external protective shell, anti-condensation components, and noise reduction components respectively provide physical protection, anti-condensation protection, and noise reduction, enhancing the equipment's adaptability and operational safety under harsh sewage treatment conditions. The overall structure is rationally laid out, with smooth airflow, enabling a stable output of high-pressure gas to meet aeration requirements and ensuring the continuous and reliable operation of the sewage treatment system.

[0018] This invention, through the setting of an anti-backflow drive mechanism, achieves precise matching between the anti-backflow action and the start / stop of the blower by synchronously linking with the circuit of the magnetic levitation centrifugal blower. When the blower is running, the anti-backflow drive component is synchronously energized to generate a magnetic attraction force. Through magnetic attraction, the anti-backflow drive magnetic block and the anti-backflow drive rack move. Then, through the step-by-step stable transmission of the anti-backflow drive gear, the anti-backflow drive worm, and the anti-backflow drive worm wheel, the three-way ball valve is precisely driven to switch directions, stably connecting the second air outlet and the anti-backflow pipeline. This ensures that the high-pressure gas output by the blower is smoothly delivered to the aeration pipeline, meeting the air supply requirements of the sewage treatment aeration conditions. At the same time, the transmission structure of the anti-backflow drive worm and the anti-backflow drive worm wheel has a self-locking characteristic, which can effectively avoid the malfunction of the three-way ball valve caused by pressure fluctuations in the aeration pipeline, ensuring the stable and reliable airflow during operation. When the blower stops normally or suddenly stops due to power failure, the magnetic force of the anti-backflow drive component disappears synchronously. Under the reset action of the anti-backflow spring, the anti-backflow drive rack can be quickly driven to move in the opposite direction. Through the transmission component, the three-way ball valve is driven to switch synchronously, instantly cutting off the connection between the second air outlet and the anti-backflow pipe. This fundamentally blocks the path of sewage in the aeration tank flowing back into the blower main unit along the pipeline, preventing backflow sewage from causing corrosion damage to the core precision components of the blower and effectively extending the service life of the entire machine. At the same time, during the switching process of the three-way ball valve, the anti-backflow pipe and the pressure relief pipe are connected simultaneously, which can quickly release the residual pressure in the aeration pipeline and further eliminate the hidden danger of sewage backflow caused by residual pressure in the pipeline. The entire structure does not require additional complex automatic control programs and emergency power supply units. It can achieve anti-backflow protection under all working conditions simply by synchronous linkage with the blower circuit. The action response is rapid and the protection is reliable. It can effectively avoid unplanned shutdowns caused by blower backflow failure, ensure the continuous and stable operation of the sewage treatment aeration system, and avoid the risk of substandard effluent quality due to aeration interruption. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0020] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0021] In the attached diagram:

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the gas-water separator structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the anti-condensation component structure of the present invention.

[0025] Figure 4 This is a schematic diagram of the primary filter structure of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the noise-reducing component of the present invention.

[0027] Figure 6 This is a schematic diagram of the anti-backflow drive magnetic block structure of the present invention.

[0028] Figure 7 This is a schematic diagram of the anti-backflow drive worm gear structure of the present invention.

[0029] Figure 8 This is a schematic diagram of the anti-backflow spring structure of the present invention.

[0030] List of reference numerals

[0031] 1. Mounting base; 101. Air-water separator; 102. Primary filter; 103. Medium-efficiency filter; 104. Protective housing; 105. Anti-condensation component; 106. Silencing component; 2. Main unit cylinder; 201. Pressure relief pipe; 202. Three-way ball valve; 203. Anti-backflow drive worm gear; 204. Anti-backflow drive worm; 205. Anti-backflow drive gear; 206. Anti-backflow drive rack; 207. Anti-backflow drive component; 208. Anti-backflow drive magnet; 209. Anti-backflow spring; 3. First-stage volute; 4. Second-stage volute; 5. First air inlet; 6. First air outlet; 7. Second air inlet; 8. Second air outlet; 9. Anti-backflow pipe; 10. Anti-backflow drive box. Detailed Implementation

[0032] Example 1:

[0033] Please refer to Figures 1 to 5 As shown:

[0034] This invention provides a magnetic levitation centrifugal blower for wastewater treatment, comprising a mounting base 1, a main body cylinder 2, a primary volute 3, a secondary volute 4, a first air inlet 5, a first air outlet 6, a second air inlet 7, a second air outlet 8, an anti-backflow pipe 9, an anti-backflow drive box 10, and a filter protection mechanism; the main body cylinder 2 is fixedly connected to the front of the mounting base 1; the primary volute 3 is fixedly connected to the left side of the main body cylinder 2; the secondary volute 4 is fixedly connected to the right side of the main body cylinder 2; the first air inlet 5 is fixedly connected to the left side of the primary volute 3; the first air outlet 6 is fixedly connected to the front of the primary volute 3; the second air inlet 7 is fixedly connected to the right side of the secondary volute 4, and the second air inlet 7 is connected to the first air outlet 6 via a pipe; the second air outlet 8 is fixedly connected to the front of the secondary volute 4; the anti-backflow pipe 9 is fixedly connected to the front of the second air outlet 8, and the anti-backflow pipe 9 is externally connected to an aeration pipe; the anti-backflow drive box 10 is fixedly connected above the anti-backflow pipe 9; and the filter protection mechanism is disposed on the outside of the mounting base 1.

[0035] The filtration and protection mechanism includes an air-water separator 101. The air-water separator 101 is located on the left side of the main body cylinder 2, and the air inlet of the air-water separator 101 is connected to an external air source.

[0036] The filtration and protection mechanism also includes a pre-filter 102 and a medium-efficiency filter 103; the air inlet of the pre-filter 102 is connected to the air outlet of the air-water separator 101; the air inlet of the medium-efficiency filter 103 is connected to the air outlet of the pre-filter 102, and the air outlet of the medium-efficiency filter 103 is connected to the first air inlet 5.

[0037] The filter protection mechanism also includes: a protective housing 104 and an anti-condensation component 105; two sets of protective housings 104 are provided, and the two sets of protective housings 104 are fixedly connected to the left and right sides of the mounting base 1, respectively, and the two sets of protective housings 104 are respectively located on the outside of the first-stage volute 3 and the second-stage volute 4; two sets of anti-condensation components 105 are provided, and the two sets of anti-condensation components 105 are both electric heating plate structures with thermostats, and the two sets of anti-condensation components 105 are fixedly connected to the outside of the protective housing 104.

[0038] The filter protection mechanism also includes a noise reduction component 106. Two sets of noise reduction components 106 are provided. Both sets of noise reduction components 106 are arc-shaped noise reduction sponge structures. The two sets of noise reduction components 106 are respectively attached to the inner side of the protective shell 104. The inner side of the two sets of noise reduction components 106 is in contact with the primary volute 3 and the secondary volute 4, respectively.

[0039] The specific usage and function of this embodiment are as follows: First, confirm that the equipment is horizontally fixed via the mounting base 1. The mounting base 1 provides stable load-bearing and vibration isolation support for the entire machine. Check the connection and sealing between the main body cylinder 2 and the first-stage volute 3 and the second-stage volute 4. The main body cylinder 2 is the core bearing cavity for the built-in high-speed motor and magnetic levitation bearing. The first-stage volute 3 and the second-stage volute 4 respectively undertake the first and second stage air pressure boosting functions. Then, check the filtration and protection mechanism, confirming that the air-water separator 101, the primary filter 102, and the medium-efficiency filter 103 are connected normally. The air-water separator 101 serves as the first line of defense for the intake air, separating water mist from the air source to prevent internal corrosion. The primary filter 102 intercepts large particulate impurities to protect the downstream end. The components include a medium-efficiency filter 103 that intercepts fine particles to prevent wear on precision parts, and its outlet is connected to the first air inlet 5 on the left side of the first-stage volute 3. At the same time, the protective housing 104 provides physical protection for the two-stage volutes. The anti-condensation component 105 prevents condensation on the housing from damaging electrical components, and the noise reduction component 106 absorbs operating noise. The magnetic levitation centrifugal blower is started. After three-stage pretreatment, the external air source enters the first-stage volute 3 through the first air inlet 5 to complete the first-stage compression. The compressed air is sent to the second air inlet 7 on the right side of the second-stage volute 4 through the first air outlet 6 at the front end of the first-stage volute 3 and the connecting pipe to complete the second-stage pressurization. The high-pressure air is sent to the anti-backflow pipe 9 through the second air outlet 8 and then enters the aeration pipe through the anti-backflow pipe 9.

[0040] Example 2:

[0041] like Figures 1 to 8 As shown:

[0042] The present invention provides a magnetic levitation centrifugal blower for sewage treatment. Based on the first embodiment, it further includes an anti-backflow drive mechanism, which is disposed inside the anti-backflow drive box 10.

[0043] The backflow prevention drive mechanism includes: a pressure relief pipe 201 and a three-way ball valve 202; the pressure relief pipe 201 is fixedly connected to the outside of the backflow prevention pipe 9, one end of the pressure relief pipe 201 is connected to the backflow prevention pipe 9, and the other end of the pressure relief pipe 201 is connected to an external exhaust gas pipe; the three-way ball valve 202 is rotatably connected to the inside of the backflow prevention pipe 9.

[0044] The anti-backflow drive mechanism also includes an anti-backflow drive worm gear 203 and an anti-backflow drive worm 204. The anti-backflow drive worm gear 203 is rotatably connected inside the anti-backflow drive housing 10 and is coaxially and fixedly connected to the rotating shaft of the three-way ball valve 202. The anti-backflow drive worm 204 is rotatably connected inside the anti-backflow drive housing 10 and meshes with the anti-backflow drive worm gear 203.

[0045] The anti-backflow drive mechanism also includes an anti-backflow drive gear 205 and an anti-backflow drive rack 206. The anti-backflow drive gear 205 is coaxially fixedly connected to the front end of the anti-backflow drive worm 204. The anti-backflow drive rack 206 is slidably connected inside the anti-backflow drive housing 10, and the anti-backflow drive rack 206 meshes with the anti-backflow drive gear 205.

[0046] The anti-backflow drive mechanism also includes: an anti-backflow drive component 207 and an anti-backflow drive magnet 208; the anti-backflow drive component 207 is an electromagnet structure, and the circuit of the anti-backflow drive component 207 is connected in series with the opening and closing circuit of the magnetic levitation centrifugal blower, and the anti-backflow drive component 207 is fixedly connected inside the anti-backflow drive box 10; the anti-backflow drive magnet 208 is fixedly connected above the anti-backflow drive rack 206, and the anti-backflow drive magnet 208 is magnetically connected to the anti-backflow drive component 207.

[0047] The anti-backflow drive mechanism also includes an anti-backflow spring 209; one end of the anti-backflow spring 209 is fixedly connected to the anti-backflow drive rack 206, and the other end of the anti-backflow spring 209 is fixedly connected to the anti-backflow drive box 10.

[0048] The specific usage and function of this embodiment: When treating sewage, the circuit of the magnetic levitation centrifugal blower is connected. At this time, the circuit of the anti-backflow drive component 207 is also connected. The anti-backflow drive component 207 generates magnetic attraction to the anti-backflow drive magnetic block 208. At this time, the anti-backflow drive magnetic block 208 is attracted and moves to the right. The movement of the anti-backflow drive magnetic block 208 to the right drives the anti-backflow drive rack 206 to the right. The movement of the anti-backflow drive rack 206 to the right drives the anti-backflow drive gear 205 to rotate. The rotation of the anti-backflow drive gear 205 drives the anti-backflow drive worm 204 to rotate. The rotation of the anti-backflow drive worm 204 drives the anti-backflow drive worm wheel 203 to rotate. The rotation of the anti-backflow drive worm wheel 203 drives the three-way ball valve 202 to rotate. At this time, the three-way ball valve 202 rotates. The ball valve 202 blocks the anti-backflow pipe 9 and the pressure relief pipe 201. The three-way ball valve 202 connects the anti-backflow pipe 9 and the second air outlet 8, allowing high-pressure gas to enter the aeration pipe. Once the magnetic levitation centrifugal blower stops, the magnetic force of the anti-backflow drive component 207 disappears. Under the action of the anti-backflow spring 209, the anti-backflow drive rack 206 moves to the left. The leftward movement of the anti-backflow drive rack 206 drives the anti-backflow drive gear 205 to rotate. The rotation of the anti-backflow drive gear 205 is transmitted through the anti-backflow drive worm 204 and the anti-backflow drive worm wheel 203. At this time, the three-way ball valve 202 rotates, connecting the anti-backflow pipe 9 and the pressure relief pipe 201, and blocking the anti-backflow pipe 9 and the second air outlet 8.

[0049] The following points should be noted in this article:

[0050] 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0051] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0052] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A magnetic levitation centrifugal blower for sewage treatment, characterized in that: The system includes a mounting base (1), a main body cylinder (2), a primary volute (3), a secondary volute (4), a first air inlet (5), a first air outlet (6), a second air inlet (7), a second air outlet (8), an anti-backflow pipe (9), an anti-backflow drive box (10), a filter protection mechanism, and an anti-backflow drive mechanism; the main body cylinder (2) is fixedly connected to the front of the mounting base (1); the primary volute (3) is fixedly connected to the left side of the main body cylinder (2); the secondary volute (4) is fixedly connected to the right side of the main body cylinder (2); the first air inlet (5) is fixedly connected to the left side of the primary volute (3); and the first air outlet... (6) is fixedly connected to the front of the first-stage volute (3); the second air inlet (7) is fixedly connected to the right side of the second-stage volute (4), and the second air inlet (7) is connected to the first air outlet (6) through a pipe; the second air outlet (8) is fixedly connected to the front of the second-stage volute (4); the anti-backflow pipe (9) is fixedly connected to the front of the second air outlet (8), and the anti-backflow pipe (9) is connected to an aeration pipe; the anti-backflow drive box (10) is fixedly connected above the anti-backflow pipe (9); the filter protection mechanism is set on the outside of the mounting base (1); the anti-backflow drive mechanism is set inside the anti-backflow drive box (10).

2. The magnetic levitation centrifugal blower for sewage treatment as described in claim 1, characterized in that: The filtration and protection mechanism includes: an air-water separator (101); the air-water separator (101) is located on the left side of the main body cylinder (2), and the air inlet of the air-water separator (101) is connected to an external air source.

3. The magnetic levitation centrifugal blower for sewage treatment as described in claim 2, characterized in that: The filtration and protection mechanism further includes a pre-filter (102) and a medium-efficiency filter (103); the air inlet of the pre-filter (102) is connected to the air outlet of the air-water separator (101); the air inlet of the medium-efficiency filter (103) is connected to the air outlet of the pre-filter (102), and the air outlet of the medium-efficiency filter (103) is connected to the first air inlet (5).

4. The magnetic levitation centrifugal blower for sewage treatment as described in claim 1, characterized in that: The filter protection mechanism also includes: a protective housing (104) and an anti-condensation component (105); the protective housing (104) is provided in two sets, and the two sets of protective housing (104) are fixedly connected to the left and right sides of the mounting base (1) respectively, and the two sets of protective housing (104) are respectively set on the outside of the first-stage volute (3) and the second-stage volute (4); the anti-condensation component (105) is provided in two sets, and the two sets of anti-condensation components (105) are both electric heating plate structures with thermostats, and the two sets of anti-condensation components (105) are fixedly connected to the outside of the protective housing (104) respectively.

5. The magnetic levitation centrifugal blower for sewage treatment as described in claim 4, characterized in that: The filter protection mechanism also includes: a noise-reducing component (106); the noise-reducing component (106) is provided in two sets, both sets of noise-reducing components (106) are arc-shaped noise-reducing sponge structures, the two sets of noise-reducing components (106) are respectively pasted on the inner side of the protective shell (104), and the inner side of the two sets of noise-reducing components (106) is in contact with the primary volute (3) and the secondary volute (4) respectively.

6. The magnetic levitation centrifugal blower for sewage treatment as described in claim 1, characterized in that: The anti-backflow drive mechanism includes: a pressure relief pipe (201) and a three-way ball valve (202); the pressure relief pipe (201) is fixedly connected to the outside of the anti-backflow pipe (9), one end of the pressure relief pipe (201) is connected to the anti-backflow pipe (9), and the other end of the pressure relief pipe (201) is connected to an external exhaust pipe; the three-way ball valve (202) is rotatably connected to the inside of the anti-backflow pipe (9).

7. The magnetic levitation centrifugal blower for sewage treatment as described in claim 6, characterized in that: The anti-backflow drive mechanism further includes: an anti-backflow drive worm wheel (203) and an anti-backflow drive worm (204); the anti-backflow drive worm wheel (203) is rotatably connected inside the anti-backflow drive housing (10), and the anti-backflow drive worm wheel (203) is coaxially fixedly connected to the rotating shaft of the three-way ball valve (202); the anti-backflow drive worm (204) is rotatably connected inside the anti-backflow drive housing (10), and the anti-backflow drive worm (204) meshes with the anti-backflow drive worm wheel (203).

8. The magnetic levitation centrifugal blower for sewage treatment as described in claim 7, characterized in that: The anti-backflow drive mechanism further includes an anti-backflow drive gear (205) and an anti-backflow drive rack (206); the anti-backflow drive gear (205) is coaxially fixedly connected to the front end of the anti-backflow drive worm (204); the anti-backflow drive rack (206) is slidably connected inside the anti-backflow drive housing (10), and the anti-backflow drive rack (206) meshes with the anti-backflow drive gear (205).

9. The magnetic levitation centrifugal blower for sewage treatment as described in claim 8, characterized in that: The anti-backflow drive mechanism further includes: an anti-backflow drive component (207) and an anti-backflow drive magnetic block (208); the anti-backflow drive component (207) is an electromagnet structure, the circuit of the anti-backflow drive component (207) is connected in series with the opening and closing circuit of the magnetic levitation centrifugal blower, and the anti-backflow drive component (207) is fixedly connected inside the anti-backflow drive box (10); the anti-backflow drive magnetic block (208) is fixedly connected above the anti-backflow drive rack (206), and the anti-backflow drive magnetic block (208) is magnetically connected to the anti-backflow drive component (207).

10. The magnetic levitation centrifugal blower for sewage treatment as described in claim 9, characterized in that: The anti-backflow drive mechanism also includes an anti-backflow spring (209); one end of the anti-backflow spring (209) is fixedly connected to the anti-backflow drive rack (206), and the other end of the anti-backflow spring (209) is fixedly connected to the anti-backflow drive box (10).

Images