A backflush system for centrifugal air compressor filters

Abstract

The utility model discloses a back-blowing system for centrifugal air compressor filters, which belongs to the technical field of compressors, and includes an air filter, a controller, and a back-blowing air source connected to the air filter through a delivery pipeline. The air filter includes an outer frame and a fixed plate transversely fixed to the upper end of the inner cavity of the outer frame. The bottom surface of the fixed plate is vertically fixed with a plurality of filter barrels, and the filter barrels are distributed in a rectangular array. A first energy accumulator is installed on the top of the fixed plate through a bracket, and a support column is fixedly provided at the bottom of the fixed plate and between each row of filter barrels. A second energy accumulator is provided at the end of the support column away from the fixed plate. The first energy accumulator and the second energy accumulator are both connected to the filter barrels through a back-blowing component, and the back-blowing component is connected to the controller. The beneficial effects of the utility model are: the air pressure during filtering operation and back-blowing operation is stable, and the back-blowing component is controlled by the controller to adjust the back-blowing pressure as needed, so as to achieve a better effect of regular back-blowing of the filter element.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, in particular to a back-blowing system for a centrifugal air compressor filter. Background Art

[0002] The centrifugal air compressor is the main supporting equipment of the oxygen generator. Its main function is to filter the raw air through the air filter and then enter the compressor for compression and boosting to provide qualified compressed air for the air separation system. The main function of the air filter is to prevent mechanical impurities such as dust in the raw air from entering the compressor and the air separation device to damage the equipment. The back-blowing air source used by the air filter in the prior art is the exhaust gas at the end of the air compressor. Since the raw air is greatly affected by the outside world and has a high water content, it is not conducive to the back-blowing self-cleaning of the paper filter element of the air filter. After running for a period of time, it is easy to cause a large amount of dust on the surface of the filter element, which makes the air compressor suction pressure low and the exhaust volume reduced. In severe cases, it may even cause a surge accident of the air compressor, which not only reduces the equipment operation cycle but also increases the operation cost, which is not conducive to the safe operation of the air compressor.

[0003] The back-blowing operation needs to be implemented using a back-blowing system. In the prior art, the back-blowing system of the air filter has different and uncontrollable blowing forces on both ends of the filter element. The back-blowing operation is uneven, which makes the back-blowing operation ineffective and the dust on the filter element difficult to clean. The back-blowing air source of the pneumatic self-cleaning air filter is drawn from behind the molecular sieve and directly connected to the filter back-blowing pipe. When the compressor inhales air containing dust, it causes equipment wear and the inhaled dust will scale on the surface of the rotor impeller. However, since the back-blowing gas pressure entering the filter cannot be adjusted according to specific conditions, the back-blowing effect is not ideal. The back-blowing gas pressure entering the filter is the same as the molecular sieve outlet pressure. The back-blowing pressure cannot be adjusted by itself. Therefore, it is necessary to carry out structural design for the back-blowing pressure of the air filter to reduce the resistance of the air compressor suction port, extend the service life of the pneumatic self-cleaning air filter, and ensure the long-term economical and stable operation of the equipment.

[0004] Patents in the field of compressor technology are disclosed in the prior art, among which the utility model patent with the announcement number CN213725337U discloses a back-blowing system for centrifugal air compressor air filter, including an air compressor and a compressor outlet pipe, a turbine and a blower, the air inlet of the turbine is connected to the compressor outlet pipe through the turbine inlet pipe, the air inlet of the blower is connected to the molecular sieve air outlet pipe through the blower inlet pipe, the air outlet of the blower is connected to the back-blowing pipeline, and the turbine of the turbine and the pump wheel of the blower are connected by a connecting rod. Although the back-blowing system of the common centrifugal air compressor air filter can extend the service life of the air filter core, and fundamentally ensure the safe operation of the special type of centrifugal compressor, and solve the problem of unstable operation of the oxygen generator unit, there is still the problem that the pressure of the back-blowing gas of the air filter is low and cannot be adjusted, and the back-blowing effect is not ideal.

[0005] In view of this, the inventor conducted in-depth research on the need to provide a high-efficiency back-flushing device that can be used for centrifugal air compressor filters, which resulted in the present case. Utility Model Content

[0006] In order to overcome the problem that the pressure of back-blowing gas is low and cannot be adjusted and the back-blowing effect is not ideal in the air filter in the prior art, the utility model provides a back-blowing system for a centrifugal air compressor filter, comprising an air filter, a controller and a back-blowing gas source connected to the air filter through a delivery pipeline, the air filter comprising an outer frame and a fixing plate laterally fixed to the upper end of the inner cavity of the outer frame, a plurality of filter barrels are vertically fixed on the bottom surface of the fixing plate, and the filter barrels are distributed in a rectangular array;

[0007] A first energy accumulator is installed on the top of the fixed plate through a bracket, a support column is fixedly arranged at the bottom of the fixed plate and between each row of filter barrels, a second energy accumulator is arranged at the end of the support column away from the fixed plate, the first energy accumulator and the second energy accumulator are both connected to the filter barrel through a back-blowing component, and the back-blowing component is connected to the controller.

[0008] A back-blowing device is set inside the filter barrel, and energy accumulators are set at both ends of the filter barrel to connect with the back-blowing air source, which ensures the back-blowing effect and the back-blowing efficiency. At the same time, the connection between the back-blowing device and the energy accumulator makes the air pressure during the filtering and back-blowing operations relatively stable, which ensures the efficiency of the filtering and back-blowing operations. In addition, a controller is set to connect with the back-blowing device, and the controller controls the back-blowing device to adjust the back-blowing pressure as required, so as to achieve a better regular back-blowing effect on the filter element.

[0009] Furthermore, sealing covers are provided at both ends of the filter barrel, and the back-blowing component includes a back-blowing pipe placed inside the filter barrel and extending out of the sealing cover. Both ends of the back-blowing pipe are connected to air intake pipes through pulse solenoid valves. The air intake pipe at the upper end of the filter barrel passes through the fixed plate and is fixedly connected to the first energy accumulator, and the air intake pipe at the lower end of the filter barrel is connected to the second energy accumulator. The pulse solenoid valve is electrically connected to the controller to control the regular back-blowing of the filter barrel.

[0010] Through the above technical solution, a back-blowing pipe is arranged inside the filter barrel, and the back-blowing pipe is fixedly connected to the first energy accumulator and the second energy accumulator at both ends through a pulse solenoid valve, thereby ensuring that the air pressure during the back-blowing operation is sufficient and stable. At the same time, the controller is connected to the solenoid valve, which can further control the back-blowing operation of the filter barrel filter element to be able to be operated on demand and at a fixed time.

[0011] Further, it is characterized in that a plurality of purge holes for spraying the filter element in the filter barrel are evenly opened on the outer wall of the back-blowing pipe located inside the filter barrel, and the plurality of purge holes are evenly arranged circumferentially around the outer periphery of the back-blowing pipe, and a purge nozzle is provided on the purge hole.

[0012] Through the above technical solution, purge holes are evenly opened on the outer wall of the backblowing pipe, and purge nozzles are installed on the purge holes, which can further increase the coverage area during spraying and the spraying force, that is, the spraying pressure.

[0013] Furthermore, an exhaust port for discharging filtered gas is provided on any side wall of the outer frame close to the first energy accumulator, and a primary filter is provided at the bottom side of the outer frame close to the second energy accumulator, and the inner cavity of the outer frame is connected to the outside through the primary filter.

[0014] Furthermore, the same side of the first energy accumulator and the second energy accumulator is connected to the back-blowing air source through the delivery pipeline, a gas tank is provided on the delivery pipeline near the outer frame, a shut-off valve and a pressure gauge are provided on the delivery pipeline at the air inlet of the gas tank in sequence, and a self-supporting pressure reducing valve is provided on one end of the delivery pipeline near the back-blowing air source.

[0015] Through the above technical solution, a gas tank is provided near the outer frame to store the backwash gas, so as to ensure the maintenance of the backwash gas pressure entering the backwash pipeline, further improve the backwash efficiency and avoid affecting the normal operation of the unit.

[0016] Furthermore, the delivery pipeline passes through the outer frame and is connected to two branch pipelines at one end close to the first energy accumulator and the second energy accumulator, and the two branch pipelines are fixedly connected to the first energy accumulator and the second energy accumulator respectively.

[0017] Furthermore, a plurality of blowers are provided on the inner side wall of the outer frame close to the upper end surface of the second energy accumulator, and the plurality of blowers are fixed on the inner side wall of the outer frame close to the connection between the second energy accumulator and the branch pipe.

[0018] Furthermore, an ash receiving plate is obliquely arranged inside the outer frame near the position of the primary filter screen, and an ash hopper is connected to the bottom of the ash receiving plate near one end of the outer frame.

[0019] Furthermore, the support column is provided with a plurality of air holes, and the plurality of air holes are arranged at equal intervals.

[0020] Furthermore, the back-blowing gas source is a single-component inert gas that has been dried.

[0021] Through the above technical solution, the back-blowing gas source uses a single-component inert gas, which can effectively improve the back-blowing effect and avoid mutual influence with the gas in the filter.

[0022] Beneficial effects:

[0023] The beneficial effects of the technical solution of the utility model are as follows:

[0024] (1) A back-blowing pipeline is set inside the filter barrel, and energy accumulators are set at both ends of the filter barrel to connect with the back-blowing gas source, which ensures the back-blowing effect and the back-blowing efficiency. At the same time, the back-blowing pipeline is connected with the energy accumulator, so that the air pressure during the back-blowing operation is relatively stable, which well ensures the efficiency of the filtering and back-blowing operations. In addition, a controller is set to connect with the back-blowing pipeline, and the controller controls the back-blowing component to adjust the gas pressure entering the back-blowing pipeline as needed, so as to achieve a better regular back-blowing effect on the filter element.

[0025] (2) A first energy accumulator and a second energy accumulator are arranged at both ends of the back-blowing pipeline to store the back-blowing gas at a position close to the back-blowing pipeline, so as to ensure that the back-blowing gas pressure entering the back-blowing pipeline is maintained. The accumulation of sufficient back-blowing gas in the first gas storage tank can also ensure that the back-blowing filter elements in all filter barrels are purged at the same time, further improving the back-blowing efficiency and avoiding affecting the normal operation of the unit.

[0026] (3) Purge holes are evenly opened on the outer wall of the back-blowing pipe, and purge nozzles are installed on the purge holes, which can further increase the coverage area and the force of the spray, that is, the spray pressure, extend the service life of the air filter, and deliver air that meets the requirements of the air compressor. It can effectively remove the dust accumulated on the surface of the filter cartridge, reduce the air intake resistance of the air filter, improve the efficiency of the subsequent air compressor and extend the operation cycle of the air compressor, effectively extend the service life of the subsequent air compressor, and effectively prevent impurities from entering the air compressor and causing mechanical failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of a backflush system for a centrifugal air compressor filter of the utility model;

[0029] Figure 2 It is a structural schematic diagram of a back-flushing system filter for a centrifugal air compressor filter of the utility model;

[0030] Figure 3 It is a structural schematic diagram of a back-flushing component of a back-flushing system for a centrifugal air compressor filter of the utility model;

[0031] In the figure, 1. air filter; 2. delivery pipeline; 3. back-blowing air source; 4. outer frame; 5. fixing plate; 6. filter barrel; 7. first energy accumulator; 8. support column; 9. second energy accumulator; 10. sealing cover; 11. back-blowing pipeline; 12. pulse solenoid valve; 13. air intake pipeline; 14. purge nozzle; 15. exhaust port; 16. primary filter; 17. gas tank; 18. stop valve; 19. pressure gauge; 20. pressure reducing valve; 21. ash receiving plate; 22. ash hopper. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] This embodiment adopts a back-blowing pipeline set inside the filter barrel, and energy accumulators are set at both ends of the filter barrel to connect with the back-blowing gas source, which ensures the back-blowing effect and the back-blowing efficiency. At the same time, the back-blowing pipeline is connected with the energy accumulator, so that the air pressure during the back-blowing operation is relatively stable, ensuring the efficiency of the filtering and back-blowing operations. The controller controls the back-blowing component to adjust the gas pressure entering the back-blowing pipeline as needed, so as to achieve a better regular back-blowing effect on the filter element. The specific implementation method is as follows:

[0034] Reference Figure 1-2 As shown, a back-blowing system for a centrifugal air compressor filter comprises an air filter 1, a controller and a back-blowing air source 3 connected to the air filter 1 through a delivery pipe 2. The air filter 1 comprises an outer frame 4 and a fixing plate 5 laterally fixed to the upper end of the inner cavity of the outer frame 4. A plurality of filter barrels 6 are vertically fixed on the bottom surface of the fixing plate 5. The filter barrels 6 are distributed in a rectangular array.

[0035] A first energy accumulator 7 is installed on the top of the fixed plate 5 through a bracket, a support column 8 is fixedly installed at the bottom of the fixed plate 5 and between each row of filter barrels 6, and a second energy accumulator 9 is provided at the end of the support column 8 away from the fixed plate 5. The first energy accumulator 7 and the second energy accumulator 9 are both connected to the filter barrel 6 through a back-blowing component, and the back-blowing component is connected to the controller.

[0036] Here, a back-blowing part is arranged inside the filter barrel 6, and an accumulator is arranged at both ends of the filter barrel 6 to connect with the back-blowing gas source 3, so as to ensure the back-blowing effect and the back-blowing efficiency. At the same time, the back-blowing part is connected with the accumulator, so that the air pressure during the filtering operation and the back-blowing operation is relatively stable, which well ensures the efficiency of the filtering and back-blowing operations. In addition, a controller is arranged to be connected with the back-blowing part, and the controller controls the back-blowing part to adjust the gas pressure entering the back-blowing pipeline 11 as required, so as to achieve a better regular back-blowing effect on the filter element.

[0037] As a preferred embodiment, sealing covers 10 are provided at both ends of the filter barrel 6, and the back-blowing part includes a back-blowing pipe 11 placed inside the filter barrel and extending out of the sealing cover 10. Both ends of the back-blowing pipe 11 are connected to an air intake pipe 13 through a pulse solenoid valve 12. The air intake pipe 13 at the upper end of the filter barrel 6 passes through the fixed plate 5 and is fixedly connected to the first energy accumulator 7, and the air intake pipe 13 at the lower end of the filter barrel 6 is connected to the second energy accumulator 9. The pulse solenoid valve 12 is electrically connected to the controller to control the regular back-blowing of the filter barrel 6.

[0038] Here, a back-blowing pipe 11 is arranged inside the filter barrel 6 and is fixedly connected to the first accumulator 7 and the second accumulator 9 at both ends through a pulse solenoid valve 12, thereby ensuring that the air pressure during the back-blowing operation is sufficient and stable. At the same time, the controller is connected to the solenoid valve to further control the back-blowing operation of the filter barrel 6 filter element to be able to be operated on demand and at a fixed time.

[0039] As a preferred embodiment, it is characterized in that a number of purge holes for spraying the filter element in the filter barrel 6 are evenly opened on the outer wall of the back-blowing pipe 11 located inside the filter barrel 6, and the purge holes are evenly arranged circumferentially around the outer periphery of the back-blowing pipe 11, and purge nozzles 14 are provided on a number of the purge holes.

[0040] Here, purge holes are evenly opened on the outer wall of the back-blowing pipe 11, and purge nozzles 14 are installed on the purge holes, which can further increase the coverage area and the strength of the spraying, that is, the spraying pressure.

[0041] As a preferred embodiment, an exhaust port 15 for discharging filtered gas is provided on any side wall of the outer frame 4 close to the first energy accumulator 7, and a primary filter screen 16 is provided on the bottom side of the outer frame 4 close to the second energy accumulator 9, and the inner cavity of the outer frame 4 is connected to the outside through the primary filter screen 16.

[0042] As a preferred embodiment, the same side of the first energy accumulator 7 and the second energy accumulator 9 is connected to the back-blowing gas source 3 through a delivery pipe 2, a gas tank 17 is provided on the delivery pipe 2 near the outer frame 4, a stop valve 18 and a pressure gauge 19 are sequentially provided on the delivery pipe 2 at the air inlet of the gas tank 17, and a self-supporting pressure reducing valve 20 is provided on one end of the delivery pipe 2 near the back-blowing gas source 3.

[0043] Here, a stop valve 18 is provided at the gas outlet of the gas tank 17 for closing the flow of gas in the gas tank 17 to open or close the backblowing operation. A gas tank 17 is provided near the outer frame 4 to store the backblowing gas, so as to ensure the maintenance of the backblowing gas pressure entering the backblowing pipeline 11, further improve the backblowing efficiency and avoid affecting the normal operation of the unit.

[0044] As a preferred embodiment, the delivery pipeline 2 passes through the outer frame 4 and is connected to two branch pipelines at one end close to the first energy accumulator 7 and the second energy accumulator 9. The two branch pipelines are fixedly connected to the first energy accumulator 7 and the second energy accumulator 9 respectively.

[0045] As a preferred embodiment, a plurality of blowers are provided on the inner side wall of the outer frame 4 near the upper end surface of the second energy accumulator 9, and the plurality of blowers are fixed on the inner side wall of the outer frame 4 near the second energy accumulator 9 connected to the branch pipe.

[0046] As a preferred embodiment, an ash receiving plate 21 is obliquely provided inside the outer frame 4 near the primary filter 16 , and an ash hopper 22 is connected to the bottom of the ash receiving plate 21 near one end of the outer frame 4 .

[0047] As a preferred embodiment, a plurality of air holes are formed on the support column 8, and the air holes are arranged at equal intervals.

[0048] As a preferred embodiment, the back-blowing gas source 3 is a single-component inert gas that has been dried.

[0049] Here, energy accumulators are provided at both ends of the filter barrel 6 and connected to the back-blowing air source 3. When the filter is back-blown, the back-blowing air source 3 enters the conveying pipeline 2, enters the gas tank 17 for storage through the self-supporting pressure reducing valve 20, reduces the pressure in the pipeline, and avoids excessive pressure in the pipeline. At the same time, the pressure in the pipeline is monitored in real time through the pressure gauge 19. The gas tank 17 is connected to the first energy accumulator 7 and the second energy accumulator 9. The pulse solenoid valves 12 located at both ends of the back-blowing pipeline 11 are controlled by the controller to back-blow the filter element of the filter barrel 6 as needed. After back-blowing, the impurities that fall on the upper end surface of the second energy accumulator 9 are blown into the ash hopper 22 by a hair dryer and then cleaned.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A backflush system for a centrifugal air compressor filter, characterized in that: The invention comprises an air filter (1), a controller and a back-blowing air source (3) connected to the air filter (1) via a delivery pipe (2); the air filter (1) comprises an outer frame (4) and a fixing plate (5) fixed transversely to the upper end of the inner cavity of the outer frame (4); a plurality of filter barrels (6) are vertically fixed on the bottom surface of the fixing plate (5); the filter barrels (6) are distributed in a rectangular array; A first energy accumulator (7) is mounted on the top of the fixed plate (5) via a bracket, a support column (8) is fixedly arranged at the bottom of the fixed plate (5) and between each row of filter barrels (6), a second energy accumulator (9) is arranged at the end of the support column (8) away from the fixed plate (5), the first energy accumulator (7) and the second energy accumulator (9) are both connected to the filter barrel (6) via a back-blowing component, and the back-blowing component is connected to the controller.

2. A backflush system for a centrifugal air compressor filter according to claim 1, characterized in that: The filter barrel (6) is provided with a sealing cover (10) at both ends, and the back-blowing component includes a back-blowing pipe (11) disposed inside the filter barrel and extending out of the sealing cover (10). Both ends of the back-blowing pipe (11) are connected to an air intake pipe (13) via a pulse solenoid valve (12). The air intake pipe (13) at the upper end of the filter barrel (6) passes through the fixed plate (5) and is fixedly connected to the first energy accumulator (7). The air intake pipe (13) at the lower end of the filter barrel (6) is connected to the second energy accumulator (9). The pulse solenoid valve (12) is electrically connected to the controller to control the back-blowing of the filter barrel (6) at regular intervals.

3. A backflush system for a centrifugal air compressor filter according to claim 2, characterized in that: A plurality of purge holes for spraying the filter element in the filter barrel (6) are evenly arranged on the outer wall of the back-blowing pipe (11) located inside the filter barrel (6), and the plurality of purge holes are evenly arranged in a circumferential direction around the outer periphery of the back-blowing pipe (11), and a purge nozzle (14) is provided on the purge hole.

4. A backflush system for a centrifugal air compressor filter according to claim 1, characterized in that: An exhaust port (15) for discharging filtered gas is provided on any side wall of the outer frame (4) close to the first energy accumulator (7), and a primary filter (16) is provided on the bottom side of the outer frame (4) close to the second energy accumulator (9), and the inner cavity of the outer frame (4) is connected to the outside through the primary filter (16).

5. A backflush system for a centrifugal air compressor filter according to claim 1, characterized in that: The first energy accumulator (7) and the second energy accumulator (9) are connected to the back-blowing gas source (3) via the delivery pipeline (2), a gas tank (17) is provided on the delivery pipeline (2) near the outer frame (4), a stop valve (18) and a pressure gauge (19) are provided on the delivery pipeline (2) at the air inlet of the gas tank (17), and a self-supporting pressure reducing valve (20) is provided on one end of the delivery pipeline (2) near the back-blowing gas source (3).

6. A backflush system for a centrifugal air compressor filter according to claim 1, characterized in that: The delivery pipeline (2) passes through the outer frame (4) and is connected to two branch pipelines at one end close to the first energy accumulator (7) and the second energy accumulator (9), and the two branch pipelines are fixedly connected to the first energy accumulator (7) and the second energy accumulator (9) respectively.

7. A backflush system for a centrifugal air compressor filter according to claim 6, characterized in that: A plurality of blowers are arranged on the inner side wall of the outer frame (4) near the upper end surface of the second energy accumulator (9), and the plurality of blowers are fixed on the inner side wall of the outer frame (4) near the connection between the second energy accumulator (9) and the branch pipe.

8. A backflush system for a centrifugal air compressor filter according to claim 4, characterized in that: An ash receiving plate (21) is obliquely arranged inside the outer frame (4) near the position of the primary filter (16), and an ash hopper (22) is connected to the bottom of the ash receiving plate (21) near one end of the outer frame (4).

9. A backflush system for a centrifugal air compressor filter according to claim 1, characterized in that: The support column (8) is provided with a plurality of air holes, and the plurality of air holes are arranged at equal intervals.

10. A backflush system for a centrifugal air compressor filter according to claim 1, characterized in that: The back-blowing gas source (3) is a single-component inert gas that has been dried.

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