An automatic cleaning system and cleaning method for the filter cotton of an air suspension blower

Abstract

An automatic cleaning system and cleaning method for the filter cotton of an air suspension blower belong to the technical field of the aeration system for sewage treatment by the A²O process. This automatic cleaning system and cleaning method for the filter cotton of an air suspension blower include a cleaning device, a drying device, and a controller. By setting up a cleaning device and a drying device to clean the filter cotton of the air suspension blower, the reusable use of the filter cotton is realized. A chemical agent tank and a clean water tank are set in the cleaning device to thoroughly clean the filter cotton, avoiding the situation that it cannot be used again due to incomplete cleaning. At the same time, a high-pressure spraying device and a water filtering support layer with a multi-layer screen structure are set in the cleaning box and the drying box to improve the cleaning and drying efficiency of the filter cotton. This cleaning method combines water immersion, chemical agent immersion, and high-pressure spraying cleaning to make the cleaning of the filter cotton more thorough, and at the same time realizes the automatic control of the cleaning and drying processes.

Description

Technical Field

[0001] The present invention relates to an automatic cleaning system and a cleaning method for a filter cotton of an air suspension blower, which belong to the technical field of an aeration system for sewage treatment by the AO process. 2 Background Art

[0002] Traditional roots blowers adopt sliding gear bearings, so they need to be regularly lubricated. Frequent lubrication will cause heavy oil stains around the equipment and an unclean working environment. Air suspension blowers are widely used in the aeration system for sewage treatment by the AO process due to their high driving efficiency, wide working range, and large pressure adjustment range. However, the filter cotton of the air suspension blower needs to be regularly replaced due to oil stains and an unclean environment. The filter cotton for the air suspension blower is made of special materials and has high requirements for the manufacturing process, so the market price has always been high. According to requirements, the filter cotton of the air suspension blower needs to be replaced every half month, which results in a relatively high operating cost of the blower. At present, there is a lack of cleaning equipment and cleaning methods for cleaning the filter cotton of the suspension blower, resulting in the inability to reuse the filter cotton. 2 Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic cleaning system and a cleaning method for a filter cotton of an air suspension blower, so that the used filter cotton of the air suspension blower can be reused twice after being cleaned, greatly reducing the operating cost.

[0004] The technical solution adopted by the present invention to solve the problems of the prior art: an automatic cleaning system for a filter cotton of an air suspension blower, which includes a cleaning device, a drying device, and a controller. The cleaning device includes a clean water tank, a chemical agent tank, and a cleaning tank. The clean water tank is connected to an outlet main valve through a cleaning water pump. One branch of the outlet main valve is connected to an immersion water inlet at the upper left part of the cleaning tank through a first outlet valve and a cleaning water pipe, and the other branch is connected to one end of a metal connecting hose through a second outlet valve. The chemical agent tank is connected to the cleaning water pipe through a chemical agent pump and a chemical agent outlet valve. A cleaning tank door is provided on the box body of the cleaning tank, a first liquid level gauge is provided at the upper left side, a second liquid level gauge is provided at the bottom, a drain port at the bottom is connected to a sewage tank through a cleaning tank sewage discharge valve and a sewage discharge pipe, an overflow port at the upper right side is connected to the sewage discharge pipe through an overflow pipe, a high-pressure spraying device is provided on the upper side inside the cleaning tank, and a first water filtering support layer is provided on the lower side inside.

[0005] The high-pressure spraying device includes a water inlet pipe and a spraying pipe. The other end of the metal connecting hose is connected to the water inlet of the water inlet pipe. One end of 50 circular spraying pipes with a length of 1300 mm, a diameter of 20 mm, and a spacing of 1 cm is connected to the water inlet pipe, and the other end is provided with spraying holes with a diameter of 2.5 mm.

[0006] ​​The drying device includes a drying oven. A drying oven door is provided on the box body of the drying oven. A thermometer is provided in the upper left part. The exhaust port at the top is connected to an induced draft fan. The drain port at the bottom is connected to a sewage pipe through a drying oven sewage discharge valve. A steam heating pipe is inserted into the interior of the box body of the drying oven. The air inlet is connected to an air inlet pipe through an air inlet valve. The exhaust port is connected to an exhaust pipe through an exhaust valve. A second water filtering support layer is provided directly above the steam heating pipe.

[0007] The first water filtering support layer and the second water filtering support layer are made of a multi-layer screen structure of 50-mesh screens made of 304 stainless steel.

[0008] The controller is electrically connected to a cleaning water pump, a total water outlet valve, a first water outlet valve, a second water outlet valve, a chemical agent pump, a chemical agent outlet valve, a first liquid level gauge, a second liquid level gauge, a cleaning tank sewage discharge valve, a thermometer, an induced draft fan, an air inlet valve, an exhaust valve, and a drying oven sewage discharge valve.

[0009] The total water outlet valve, the first water outlet valve, the second water outlet valve, the chemical agent outlet valve, the cleaning tank sewage discharge valve, the air inlet valve, the exhaust valve, and the drying oven sewage discharge valve are all electric butterfly valves that are convenient for the controller to control.

[0010] The cleaning method of the automatic cleaning system for the air suspension fan filter cotton described above includes the following steps:

[0011] a. Make up clear water in the clear water tank, inject a scale inhibitor solution with a mass fraction of 10% into the chemical agent tank, open the cleaning tank door, place the filter cotton to be cleaned flat on the first water filtering support layer, and close the door.

[0012] b. Set t1 = 5 min, t2 = 20 min, t3 = 20 min, t4 = 10 min, s1 = 0 cm on the operation panel of the controller. Start the cleaning button of the controller. The controller sequentially opens the total water outlet valve and the first water outlet valve, and starts the cleaning water pump. When the liquid level in the cleaning tank reaches the position of the first liquid level gauge, the first liquid level gauge feeds back a signal to the controller to close the cleaning water pump and the first water outlet valve. After soaking the filter cotton for 5 min, the controller sequentially opens the cleaning tank sewage discharge valve and the second water outlet valve, and starts the cleaning water pump. The clear water enters the high-pressure spraying device through the metal connecting hose to clean the filter cotton. After 20 min, the controller sequentially closes the cleaning water pump, the second water outlet valve, and the cleaning tank sewage discharge valve.

[0013] c. The controller opens the chemical agent outlet valve and starts the chemical agent pump. When the liquid level in the cleaning tank reaches the position of the first liquid level gauge, the controller sequentially closes the chemical agent pump and the chemical agent outlet valve. After soaking for 20 min, the controller opens the cleaning tank sewage discharge valve to discharge the waste liquid to the sewage pool, opens the second water outlet valve, and starts the cleaning water pump. The filter cotton is cleaned under high pressure through the high-pressure spraying device for 10 min, and then the controller sequentially closes the cleaning water pump (2) and the second water outlet valve.

[0014] d. When the liquid level in the cleaning tank drops to the position of the second liquid level gauge, the second liquid level gauge feeds back a signal to the controller. The controller controls the audible alarm to sound, closes the sewage discharge valve of the cleaning tank, turns off the cleaning button on the controller, and takes out the filter cotton.

[0015] e. Open the drying oven door, place the filter cotton cleaned in step d flat on the second water filtering layer, close the oven door, set t5 = 360 min and T1 = 75 °C on the operation panel, and start the drying button on the controller. The controller sequentially opens the sewage discharge valve, induced draft fan, intake valve, and exhaust valve of the drying oven to start drying.

[0016] f. When the temperature in the drying oven is greater than 75 °C, the temperature measuring instrument feeds back a signal to the controller. The controller closes the intake valve and the exhaust valve until the temperature in the drying oven is less than 75 °C, and then the controller opens the intake valve and the exhaust valve. After the drying time reaches the set 360 min, the audible alarm sounds, and the controller sequentially closes the intake valve, exhaust valve, and induced draft fan, and presses the stop drying button on the controller.

[0017] g. Open the drying oven door (14a) to take out the filter cotton for standby.

[0018] Advantages of the present invention: This automatic cleaning system for the filter cotton of an air suspension fan includes a cleaning device, a drying device, and a controller, which cleans the filter cotton of the air suspension fan, realizing the reuse of the filter cotton. The cleaning device is provided with a chemical agent tank and a clean water tank to thoroughly clean the filter cotton, avoiding the inability to be reused due to incomplete cleaning. At the same time, the high-pressure spray device and the water filtering layer with a multi-layer screen structure are set to improve the cleaning and drying efficiency of the filter cotton. In addition, the automatic cleaning of the filter cotton is realized through the control of the controller, and the equipment is simple and efficient. This cleaning method combines water immersion, chemical agent immersion, and high-pressure spray cleaning to make the cleaning of the filter cotton more thorough, realizing the automatic control of the cleaning and drying processes. This cleaning system and cleaning method realize the reuse of the filter cotton. The replaced filter cotton cleaned by this system can be reused twice, greatly reducing the operating cost. Description of the Drawings

[0019] Figure 1 It is a structural schematic diagram of an automatic cleaning system for the filter cotton of an air suspension fan.

[0020] In the figure: 1. clean water tank, 2. cleaning water pump, 3. total outlet valve, 4. first outlet valve, 4a. cleaning water pipe, 5. second outlet valve, 6. metal connecting hose, 7. chemical agent tank, 8. chemical agent pump, 9. chemical agent outlet valve, 10. cleaning tank, 10a. cleaning tank door, 10b. first liquid level gauge, 10c. second liquid level gauge, 10d. overflow pipe, 11. high-pressure spraying device, 12. first water filtering support layer, 13. cleaning tank sewage discharge valve, 13a. sewage discharge pipe, 14. drying box, 14a. drying box door, 14b. temperature measuring instrument, 15. second water filtering support layer, 16. induced draft fan, 17. steam heating pipe, 17a. intake valve, 17b. exhaust valve, 18. drying box sewage discharge valve, 19. sewage pool, 20. controller, 20a. sound alarm, 20b. operation panel. Detailed implementation mode

[0021] The present invention will be described below in conjunction with the accompanying drawings and specific implementation modes:

[0022] Figure 1 It is a structural schematic diagram of an automatic cleaning system for the filter cotton of an air suspension fan. In the figure, this automatic cleaning system for the filter cotton of an air suspension fan includes a cleaning device, a drying device and a controller. The cleaning device includes a clean water tank 1, a chemical agent tank 7 and a cleaning tank 10. The clean water tank 1 is connected to the total outlet valve 3 through a cleaning water pump 2. One branch of the total outlet valve 3 is connected to the soaking water inlet at the upper left part of the cleaning tank 10 through a first outlet valve 4 and a cleaning water pipe 4a, and the other branch is connected to one end of a metal connecting hose 6 through a second outlet valve 5. The chemical agent tank 7 is connected to the cleaning water pipe 4a through a chemical agent pump 8 and a chemical agent outlet valve 9. A cleaning tank door 10a is arranged on the box body of the cleaning tank 10, a first liquid level gauge 10b is arranged at the upper left part, a second liquid level gauge 10c is arranged at the bottom, the drain port at the bottom is connected to the sewage pool 19 through a cleaning tank sewage discharge valve 13 and a sewage discharge pipe 13a, and the overflow port at the upper right part is connected to the sewage discharge pipe 13a through an overflow pipe 10d. A high-pressure spraying device 11 is arranged on the upper side inside the cleaning tank 10, and a first water filtering support layer 12 is arranged on the lower side inside.

[0023] The high-pressure spraying device 11 includes a water inlet pipe 11a and a spraying pipe 11b. The other end of the metal connecting hose 6 is connected to the water inlet of the water inlet pipe 11a. One end of 50 circular spraying pipes 11b with a length of 1300 mm, a diameter of 20 mm and a spacing of 1 cm is communicated with the water inlet pipe 11a, and the other end is provided with spraying holes with a diameter of 2.5 mm.

[0024] The drying device includes a drying oven 14. A drying oven door 14a is provided on the box body of the drying oven 14. A thermometer 14b is provided in the upper left part. The exhaust port at the top is connected to an induced draft fan 16. The drain port at the bottom is connected to a sewage discharge pipe 13a through a drying oven sewage discharge valve 18. A steam heating pipe 17 is inserted into the interior of the box body of the drying oven 14. The air inlet is connected to an air inlet pipe through an air inlet valve 17a, and the exhaust port is connected to an exhaust pipe through an exhaust valve 17b. A second water filtering support layer 15 is provided directly above the steam heating pipe 17.

[0025] The first water filtering support layer 12 and the second water filtering support layer 15 are made of a multi-layer screen structure formed by a 50-mesh screen of 304 stainless steel.

[0026] The controller is electrically connected to a cleaning water pump 2, a total water outlet valve 3, a first water outlet valve 4, a second water outlet valve 5, a chemical agent pump 8, a chemical agent outlet valve 9, a first liquid level gauge 10b, a second liquid level gauge 10c, a cleaning tank sewage discharge valve 13, a thermometer 14b, an induced draft fan 16, an air inlet valve 17a, an exhaust valve 17b, and a drying oven sewage discharge valve 18.

[0027] The total water outlet valve 3, the first water outlet valve 4, the second water outlet valve 5, the chemical agent outlet valve 9, the cleaning tank sewage discharge valve 13, and the drying oven sewage discharge valve 18 are all electric butterfly valves, and their opening or closing is controlled by a signal output by the controller 20. The high-pressure spray device 11 is made of 304 stainless steel. The overflow pipe 10d in the upper right part of the cleaning tank 10 is a stainless steel pipe with a diameter of 50 mm.

[0028] The sound alarm 20a is related to the instruction issued by the controller 20. After the cleaning button of the controller 20 is started and 6 high-level alarms occur, the sound alarm 20a starts to emit sound to prompt that the cleaning tank door 10a can be opened.

[0029] The cleaning method of this air suspension fan filter cotton automatic cleaning system includes the following steps:

[0030] a. Make up the clear water in the clear water tank 1 and inject a scale inhibitor solution with a mass fraction of 10% into the chemical agent tank 17.

[0031] b. Open the filter cotton cleaning tank door 10a, place the filter cotton to be cleaned (at most 2 pieces) flat on the first water filtering support layer 12, and close the cleaning tank door 10a.

[0032] c. Set t1 = 5 min, t2 = 20 min, t3 = 20 min, t4 = 10 min, and s1 = 0 cm on the operation panel 20b of the controller 20.

[0033] d. Start the cleaning button on the controller 20, and control the cleaning through the controller in the following sequence:

[0034] d1. Open the first water outlet valve 4 and the total water outlet valve 3 in sequence, and then start the cleaning water pump 2;

[0035] d2. When the liquid level in the filter cotton cleaning tank 10 reaches the upper limit, the controller uses the signal fed back by the first liquid level gauge 10b to close the cleaning water pump 2, the first water outlet valve 4 and the total water outlet valve 3 in sequence;

[0036] d3. The filter cotton to be cleaned is soaked in the filter cotton cleaning tank 10 for 5 min (t1). The controller 20 sends signals to open the sewage discharge valve 13 of the cleaning tank, the second water outlet valve 5 and the total water outlet valve 3 in sequence, and start the cleaning water pump 2. The clear water passes through the metal connecting hose 6 and the high-pressure spraying device 11 to conduct high-pressure flushing on the filter cotton. The sewage after cleaning flows to the sewage pool 19. The high-pressure spraying cleaning time is 20 min (t2). The controller 20 sends signals to stop the operation of the cleaning water pump 2, close the second water outlet valve 5 and the total water outlet valve 3, and close the sewage discharge valve 13 of the filter cotton cleaning tank;

[0037] d4. The controller 20 sends signals to open the outlet valve 9 of the chemical agent pump and start the chemical agent pump 8. When the liquid level in the filter cotton cleaning tank 10 reaches the first liquid level gauge 10b, a feedback signal is sent to the controller 20 to stop the operation of the chemical agent pump 8 and close the outlet valve 9 of the chemical agent pump. The filter cotton is soaked in the cleaning tank 10 with chemicals for 20 min (t3);

[0038] d5. The controller 20 sends signals to open the sewage discharge valve 13 of the cleaning tank to drain the waste liquid in the filter cotton cleaning tank 10 to the sewage pool 19, open the second water outlet valve 5 and the total water outlet valve 3, and start the cleaning water pump 2. The clear water passes through the metal connecting hose 6 and the high-pressure spraying device 11. The high-pressure spraying cleaning time is 10 min (t4). The controller 20 sends signals to stop the operation of the cleaning water pump 2, close the second water outlet valve 5 and the total water outlet valve 3;

[0039] d6. When the liquid level drops to the position of the second liquid level gauge 10c, the second liquid level gauge 10c sends a low liquid level signal to the controller 20. After being processed by the controller 20, a signal is sent to the sound alarm 20a. At this time, close the sewage discharge valve 13 of the cleaning tank, open the cleaning tank door 10a, the sound alarm 20a stops alarming, take out the filter cotton, close the door, and press the stop cleaning button of the controller 20.

[0040] e. Open the door 14a of the filter cotton drying box, place the above-mentioned cleaned filter cotton (at most 2 pieces) flat on the second water filtering layer 15, and close the door of the filter cotton drying box.

[0041] e1. Start the drying button of the controller 20, set t5 = 360 min and T1 = 75 °C on the operation panel 20b of the controller, and conduct filter cotton drying according to the program of the controller 20.

[0042] e2. Open the drain valve 18 of the drying oven, the induced draft fan 16, the inlet valve 17a of the steam heating pipe 17, and the outlet valve 17b of the steam heating pipe 17 in sequence.

[0043] e3. When the temperature in the filter cotton drying oven 14 > 75 °C (T1), the temperature measuring instrument 14b feeds back a signal to the controller 20, and the controller 20 closes the inlet valve 17a and the outlet valve 17b of the steam heating pipe 17. When the temperature in the filter cotton drying oven 14 < 75 °C (T1), the temperature measuring instrument 14b feeds back a signal to the controller 20, and the controller 20 opens the inlet valve 17a and the outlet valve 17b of the steam heating pipe 17.

[0044] e4. When the drying time reaches 360 min (t5), the controller 20 sends a signal to close the inlet valve 17a and the outlet valve 17b of the steam heating pipe 17, stop the operation of the induced draft fan 16, and press the drying stop button of the controller 20.

[0045] e5. Open the door 14a of the filter cotton drying oven, take out the filter cotton for standby, and then close the door of the drying oven.

Claims

1. A cleaning method for an automatic cleaning system of air suspension fan filter cotton, characterized in that: The cleaning system includes a cleaning device, a drying device and a controller (20). The cleaning device comprises a fresh water tank (1), a chemical agent tank (7) and a cleaning tank (10). The fresh water tank (1) is connected to an outlet main valve (3) through a cleaning water pump (2). One branch of the outlet main valve (3) is connected to the soaking water inlet at the upper left part of the cleaning tank (10) through a first outlet valve (4) and a cleaning water pipe (4a), and the other branch is connected to one end of a metal connecting hose (6) through a second outlet valve (5). The chemical agent tank (7) is connected to the cleaning water pipe (4a) through a chemical agent pump (8) and a chemical agent outlet valve (9). A cleaning tank door (10a) is arranged on the casing of the cleaning tank (10), a first liquid level gauge (10b) is arranged at the upper left part, a second liquid level gauge (10c) is arranged at the bottom, and the drain outlet at the bottom is connected to a sewage tank (19) through a cleaning tank sewage discharge valve (13) and a sewage discharge pipe (13a). The overflow port at the upper right part is connected to the sewage discharge pipe (13a) through an overflow pipe (10d). A high-pressure spray device (11) is arranged on the upper side inside the cleaning tank (10), and a first water filtering support layer (12) is arranged on the lower side inside; The high-pressure spray device (11) comprises a water inlet pipe (11a) and a spray pipe (11b). The other end of the metal connecting hose (6) is connected to the water inlet of the water inlet pipe (11a). One end of 50 circular spray pipes (11b) with a length of 1300 mm, a diameter of 20 mm and a spacing of 1 cm is communicated with the water inlet pipe (11a), and the other end is provided with spray holes with a diameter of 2.5 mm; The drying device comprises a drying box (14). A drying box door (14a) is arranged on the casing of the drying box (14), a temperature measuring instrument (14b) is arranged at the upper left part, the exhaust port at the top is connected to an induced draft fan (16), the drain outlet at the bottom is connected to the sewage discharge pipe (13a) through a drying box sewage discharge valve (18), a steam heating pipe (17) is inserted into the inside of the casing of the drying box (14), the air inlet is connected to an air inlet pipe through an air inlet valve (17a), the exhaust port is connected to an exhaust pipe through an exhaust valve (17b), and a second water filtering support layer (15) is arranged directly above the steam heating pipe (17); The first water filtering support layer (12) and the second water filtering support layer (15) are made of a multi-layer screen structure of 50-mesh screens made of 304 stainless steel; The controller (20) is electrically connected to the cleaning water pump (2), the outlet main valve (3), the first outlet valve (4), the second outlet valve (5), the chemical agent pump (8), the chemical agent outlet valve (9), the first liquid level gauge (10b), the second liquid level gauge (10c), the cleaning tank sewage discharge valve (13), the temperature measuring instrument (14b), the induced draft fan (16), the air inlet valve (17a), the exhaust valve (17b) and the drying box sewage discharge valve (18); The outlet main valve (3), the first outlet valve (4), the second outlet valve (5), the chemical agent outlet valve (9), the cleaning tank sewage discharge valve (13), the air inlet valve (17a), the exhaust valve (17b) and the drying box sewage discharge valve (18) are all electric butterfly valves which are convenient for the controller (20) to control; The cleaning method comprises the following steps: a. Fill the water tank (1) with fresh water, inject a scale inhibitor solution with a mass fraction of 10% into the chemical tank (7), open the cleaning box door (10a), place the filter cotton to be cleaned flat on the first water filtering layer (12), and close the box door; b. Set t1 = 5 min, t2 = 20 min, t3 = 20 min, t4 = 10 min, s1 = 0 cm on the operation panel (20b) of the controller (20). Start the cleaning button of the controller (20). The controller (20) sequentially opens the main water outlet valve (3) and the first water outlet valve (4), and starts the cleaning water pump (2). When the liquid level in the cleaning box (10) reaches the position of the first liquid level gauge (10b), the first liquid level gauge (10b) feeds back a signal to the controller (20) to close the cleaning water pump (2) and the first water outlet valve (4). After soaking the filter cotton for 5 min, the controller (20) sequentially opens the cleaning box sewage discharge valve (13) and the second water outlet valve (5), and starts the cleaning water pump (2). The fresh water enters the high-pressure spraying device (11) through the metal connecting hose (6) to clean the filter cotton. After 20 min, the controller (20) sequentially closes the cleaning water pump (2), the second water outlet valve (5), and the cleaning box sewage discharge valve (13); c. The controller (20) opens the chemical outlet valve (9) and starts the chemical pump (8). When the liquid level in the cleaning box (10) reaches the position of the first liquid level gauge (10b), the controller (20) sequentially closes the chemical pump (8) and the chemical outlet valve (9). After soaking for 20 min, the controller (20) opens the cleaning box sewage discharge valve (13) to drain the waste liquid into the sewage pool (19), opens the second water outlet valve (5), and starts the cleaning water pump (2). After high-pressure cleaning the filter cotton through the high-pressure spraying device (11) for 10 min, the controller (20) sequentially closes the cleaning water pump (2) and the second water outlet valve (5); d. When the liquid level in the cleaning box (10) drops to the position of the second liquid level gauge (10c), the second liquid level gauge (10c) feeds back a signal to the controller (20). The controller (20) controls the sound alarm (20a) to alarm, closes the cleaning box sewage discharge valve (13), closes the cleaning button on the controller (20), and takes out the filter cotton; e. Open the drying box door (14a), place the filter cotton cleaned in step d flat on the second water filtering layer (15), close the box door, set t5 = 360 min and T1 = 75 °C on the operation panel (20b), and start the drying button on the controller (20). The controller (20) sequentially opens the drying box sewage discharge valve (18), the induced draft fan (16), the air inlet valve (17a), and the exhaust valve (17b) to start drying; f. When the temperature in the drying oven (14) is greater than 75 °C, the temperature measuring instrument (14b) feeds back a signal to the controller (20), and the controller (20) closes the intake valve (17a) and the exhaust valve (17b) until the temperature in the drying oven (14) is less than 75 °C, and then the controller (20) opens the intake valve (17a) and the exhaust valve (17b); after the drying time reaches the set 360 min, the sound alarm (20a) gives an alarm, and the controller (20) sequentially closes the intake valve (17a), the exhaust valve (17b), and the induced draft fan (16), and presses the stop drying button of the controller (20); g. Open the drying oven door (14a) to take out the filter cotton for standby.

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