A flotation machine with filter press structure

Abstract

The present invention discloses an air flotation machine with a filter press structure. The air flotation machine can reduce the water content of the scum by scraping the scum on the water surface of the scraping area to the filter press area through a scraping assembly, dehydrating the scum through the filter press assembly, and reducing the water content of the scum. The air flotation machine is characterized by being composed of a scraping assembly, a filter press assembly, a contact assembly, and a flocculation assembly. The scraping assembly is composed of a separation tank, a partition plate, a scraping area, a filter press area, a scraping plate, a transmission chain, a transmission shaft, a third rotating motor, a support base, and a transmission wheel. The separation tank is a square structure with an open top. A partition plate is vertically arranged on the bottom surface of the separation tank. The height of the partition plate is lower than the height of the separation tank. The partition plate divides the inner cavity of the separation tank into a scraping area and a filter press area. The top of the scraping area is flush with the top of the filter press area and is connected. The bottom surface height of the filter press area is greater than the bottom surface height of the scraping area.

Description

Technical Field

[0001] The present invention discloses an air flotation machine with a filter press structure, which relates to a structure capable of reducing the water content of scum, and belongs to the technical field of sewage treatment, and particularly relates to an air flotation machine capable of reducing the water content of scum by scraping scum on the water surface of a scraping area to a filter press area through a scraping component, and dehydrating the scum through the filter press component. Background Art

[0002] Air flotation machine is a kind of equipment used for water treatment, mainly used in chemical plants, drinking water treatment, industrial wastewater treatment and other fields. Its working principle is to inject air or other gases into the water to generate a large number of tiny bubbles, and use these bubbles to adsorb impurities such as suspended matter, grease, etc. that are difficult to remove by natural sedimentation or floating in the water, so that they float on the water surface, thereby achieving solid-liquid separation. The traditional air flotation machine mainly includes components such as dosing device, dissolved air system, air flotation tank and scraping mechanism. The sewage first enters the reaction tank and mixes with the added flocculant to produce flocculation reaction, and then enters the contact tank to combine with the tiny bubbles in the dissolved air water to form floccules, enter the separation tank and float to the water surface to form scum, and finally the scum is scraped into the scum collection tank by the scraping mechanism for discharge. However, in traditional flotation machines, flocculants are added into the reaction tank through a dosing device. When the flocculants are added, they only exist in a certain position of the reaction tank, and the addition is uneven. Since the sewage continuously flows into the reaction tank at a certain flow rate, the sewage and the flocculant cannot fully contact each other before entering the next link, so that part of the sewage cannot be flocculated and floccules cannot be produced, resulting in low sewage treatment efficiency and poor treatment effect; and the tiny bubbles generated in the dissolved air system are also only concentrated in a certain position of the contact tank and cannot quickly diffuse to various areas of the contact tank, resulting in some floccules cannot be fully bonded with the tiny bubbles and cannot produce scum, resulting in low sewage treatment efficiency and poor treatment effect.

[0003] Announcement No. CN217895336U discloses a flotation machine with a sludge dewatering device, including an equipment body, the equipment body is divided into a dosing pretreatment unit, a flotation reaction treatment unit and a sludge dewatering treatment unit by a stainless steel partition, the dosing pretreatment unit includes a coagulant dosing reaction zone and a coagulant dosing reaction zone, the flotation reaction treatment unit is provided with a perforated water distribution pipeline, a dissolved air releaser, a mud discharge pipeline, an emptying pipeline, a slag scraping device, and a slag collection tank, and the sludge dewatering treatment unit includes a dehydration rotating motor and a dewatering tank. The above-mentioned flotation machine is provided with a coagulant dosing reaction zone agitator and a coagulant dosing reaction agitator, which can promote the full contact between sewage and flocculants and produce more floccules, but the tiny bubbles generated by the dissolved air tank in the above-mentioned flotation machine are only concentrated at a certain position of the equipment body through the dissolved air releaser, and cannot be quickly diffused to various areas of the equipment body, resulting in that some floccules cannot be fully bonded with the tiny bubbles and cannot produce slag, thereby resulting in low sewage treatment efficiency and poor treatment effect.

[0004] In order to improve the above problems, the applicant filed a Chinese invention patent application entitled "A flotation machine". The flocculation component is used to make the sewage fully contact with the flocculant to produce flocs. The contact component is used to make the flocs with a density less than that of water fully bond with tiny bubbles to form foam flocs. Finally, the foam flocs and sewage enter the separation tank through the sewage pipe. The foam flocs float to the water surface of the separation tank under the action of buoyancy to form scum. The scum on the water surface of the separation tank is scraped into the scum box by the scraper. However, the scraper in the flotation machine will scrape part of the sewage into the scum tank when scraping the scum into the scum box. The scum in the scum tank is not further dehydrated, resulting in a high water content of the scum and poor sewage treatment effect. Summary of the invention

[0005] In order to improve the above situation, the present invention provides an air flotation machine with a filter press structure, which scrapes the scum on the water surface of the scraping area to the filter press area through a scraping assembly, dehydrates the scum through the filter press assembly, and can reduce the water content of the scum.

[0006] The present invention provides an air flotation machine with a filter press structure as follows: The present invention provides an air flotation machine with a filter press structure as follows: The air flotation machine with a filter press structure comprises a scraping assembly, a filter press assembly, a contact assembly and a flocculation assembly. The scraper assembly is composed of a separation tank, a partition plate, a scraper area, a filter press area, a scraper plate, a transmission chain, a transmission shaft, a third rotating motor, a support base and a transmission wheel. The separation tank is a square structure with an open top. A partition plate is vertically arranged on the bottom surface of the separation tank. The height of the partition plate is lower than the height of the separation tank. The partition plate divides the inner cavity of the separation tank into a scraping area and a filter pressing area. The top of the scraping area is flush with the top of the filter pressing area and is connected. The bottom height of the filter press area is greater than the bottom height of the scraping area. The third rotating motor is placed on one side of the top of the scraping area. Two sets of supporting bases are symmetrically arranged on both sides of the top of the scraping area. Preferably, there are two support bases in each group, and the two support bases are respectively disposed at two ends of the scraping area. Transmission shafts are rotatably disposed between the two groups of support bases. Transmission wheels are respectively sleeved on both ends of the transmission shaft. One end of one of the transmission shafts is connected to the motor shaft of the third rotating motor, The transmission wheels are connected by a transmission chain. The two ends of the scraper plate are rotatably placed on the transmission chain respectively. Preferably, there are multiple scraper plates, and the multiple scraper plates are arranged equidistantly along the length direction of the transmission chain. Preferably, the scraper plate is an L-shaped structure. The filter press assembly is composed of a slag collecting box, a mud inlet, a mud discharge pipe, an upper pressure roller, a lower pressure roller, an upper filter belt, a lower filter belt and a water outlet pipe. A mud inlet is provided at the upper end of one side of the slag collecting box. Preferably, the width of the mud inlet is equal to the width of the slag collecting box. Preferably, the slag collecting box has a conical structure from two-thirds to the bottom surface. The slag collecting box is placed on the inner bottom surface of the filter press area and is close to the partition plate. The height of the slag collecting box is less than the height of the partition plate. One end of the mud discharge pipe is placed in the middle of the bottom surface of the slag collecting box through the through hole opened on the bottom surface of the filter press area, and is connected to the slag collecting box. One end of the water outlet pipe is placed in the middle of the bottom surface of the filter press area and is connected to the filter press area. A fourth rotating motor and a fifth rotating motor are disposed on one side of the filter press area. One end of the main upper pressure roller is connected to the motor shaft of the fourth rotating motor through a through hole opened on one side of the filter press area. The other end of the main upper pressure roller is placed on the other inner side of the filter press area through a bearing. One end of the upper pressure roller is placed on an inner side of the filter press area through a bearing. The other end of the upper pressure roller is placed on the other inner side of the filter press area through a bearing. The upper pressure roller is located above the slag collecting box and close to the partition plate. The height of the main upper pressure roller is greater than the height of the secondary upper pressure roller. The main upper pressure roller and the secondary upper pressure roller are connected via an upper filter belt. Preferably, one end of the upper filter belt contacts the bottom surface of the scraper plate. One end of the main lower pressure roller is connected to the motor shaft of the fifth rotating motor through a through hole opened on one side of the filter press area. The other end of the main lower pressure roller is placed on the other inner side of the filter press area through a bearing. Multiple lower pressure rollers are respectively placed on an inner side of the filter press area through bearings at one end thereof. The other end of the multiple lower pressure rollers are respectively placed on the other inner side of the filter press area through bearings. The main lower pressure roller and the plurality of the lower secondary pressure rollers are located below the upper secondary pressure roller. The heights of the main lower pressure roller and the multiple lower pressure rollers gradually increase along the direction of scum transmission, then decrease in a V-shape and increase again, and finally extend to the mud inlet. There is a lower pressure roller at each end of the V-shaped structure, and the bottom of the V-shaped structure is composed of two upper and lower lower pressure rollers. The main lower pressure roller and the plurality of slave lower pressure rollers are connected via a lower filter belt; Preferably, the width of the lower filter belt is less than or equal to the width of the mud inlet; The contact assembly is composed of a contact box, a blower, an air inlet pipe, a connecting pipe, an air inlet branch pipe, a disc aerator, a second rotating motor, a support rod, a rotating disc, rotating blades and a sewage pipe. The contact box is located outside the separation tank. The second rotating motor is placed in the middle of the inner bottom surface of the contact box. The support rod is located in the contact box. The length of the support rod is smaller than the height of the contact box. One end of the support rod is connected to the motor shaft of the second rotating motor, A rotating disc is sleeved on the side of the support rod. Preferably, there are multiple rotating discs, and the multiple rotating discs are arranged equidistantly along the length direction of the support rod. The side of the rotating disc is provided with rotating blades. Preferably, there are a plurality of rotating blades, and the plurality of rotating blades are arranged equidistantly along the circumferential direction of the side surface of the rotating disk. Preferably, the rotating blade is an arc-shaped structure. The blower is located outside the contact box. One end of the air inlet pipe is connected to the air outlet of the blower and communicates with the air outlet of the blower. The connecting pipe is placed on the inner bottom surface of the contact box. The connecting pipe is a closed structure at both ends. Preferably, the connecting pipe is parallel to a side surface of the contact box and close to a side surface of the contact box. Preferably, the length of the connecting pipe is equal to the length of one side of the contact box. The other end of the air inlet pipe passes through a through hole opened at the bottom of one side of the contact box and is placed on the side of one end of the connecting pipe, and is connected to the side of one end of the connecting pipe. One end of the intake branch pipe is vertically placed on the side of the connecting pipe. The air intake branch pipe is a structure with a closed end. Preferably, there are multiple intake branch pipes, and the multiple intake branch pipes are arranged equidistantly along the length direction of the side surface of the connecting pipe. Preferably, the length of the air intake branch pipe is equal to the length of the other side of the contact box. The disc aerator is placed on the top side of the air inlet branch pipe. Preferably, there are a plurality of the disc aerators, and the plurality of the disc aerators are arranged equidistantly along the length direction of the air inlet branch pipe. One end of the sewage pipe is placed on the side of the contact box and is connected to the contact box. One end of the sewage pipe is close to the top surface of the contact box. The other end of the sewage pipe is placed at the bottom of the side of the scraping area and is connected to the scraping area. The flocculation assembly is composed of a first rotating motor, a dosing hopper, a sewage inlet pipe, a rotating rod, a spiral blade, a flocculation box and a water outlet. The flocculation box is placed on the top surface of the contact box. One end of the dosing hopper is placed on the top surface of the flocculation box and is connected to the flocculation box. Preferably, the diameter of the dosing hopper remains unchanged from one end to one third of the diameter, and gradually increases from one third of the diameter to the other end. The first rotating motor is placed in the middle of the top surface of the flocculation box. The rotating rod is placed in the flocculation box. One end of the rotating rod is connected to the motor shaft of the first rotating motor through a through hole opened in the middle of the flocculation box. The length of the rotating rod is smaller than the height of the flocculation box. The spiral blade is placed on the side of the rotating rod. Preferably, the length of the spiral blade is equal to the length of the rotating rod. Preferably, a plurality of spoiler protrusions are evenly arranged on the spiral blade. One end of the sewage inlet pipe is placed on one side of the flocculation box and is connected to the flocculation box. The bottom surface of the flocculation box is provided with a water outlet hole, and the water outlet hole is located at the side of the bottom surface of the flocculation box; Furthermore, one side of the mud inlet plate is placed at the bottom of the mud inlet port, and the other side of the mud inlet plate is close to one end of the lower filter belt; Preferably, the mud inlet plate is an arc-shaped structure, and the width of the mud inlet plate is greater than or equal to the width of the lower filter belt; Furthermore, the bottom surface of the scraper plate is covered with oil-absorbing felt, and the length of the oil-absorbing felt is equal to the length of the scraper plate. Beneficial Effects

[0007] 1. The transmission shaft is driven to rotate by the third rotating motor, the transmission wheel is driven to rotate by the transmission shaft, the transmission chain is driven to rotate by the transmission wheel, and the transmission chain drives multiple scrapers to move from one end of the scraping area to the other end, so that the scum on the water surface of the scraping area can be scraped to the filter press area for dehydration treatment.

[0008] 2. The main upper pressure roller and the slave upper pressure roller are driven to rotate by the fourth rotating motor, and the main lower pressure roller and multiple slave lower pressure rollers are driven to rotate by the fifth rotating motor. The scum moves with the upper filter belt to between the upper and lower filter belts. After being squeezed between the upper and lower filter belts, the scum can be dehydrated. The moisture in the scum is filtered by the upper and lower filter belts and enters the bottom of the filter press area and is discharged from the drain pipe. The dehydrated scum enters the scum collecting box and is discharged from the mud discharge pipe, which can reduce the water content of the scum and improve the sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional structural diagram of an air flotation machine with a filter press structure of the present invention; Figure 2 This is a three-dimensional structural diagram of an air flotation machine with a filter press structure of the present invention, which only shows the internal structures of the flocculation box and the contact box; Figure 3 This is a structural schematic diagram of an air flotation machine with a filter press structure according to the present invention; Figure 4 It is a three-dimensional structural diagram of Example 2 of an air flotation machine with a filter press structure of the present invention; Figure 5 This is a schematic structural diagram of Example 3 of an air flotation machine with a filter press structure according to the present invention. Attached photos

[0010] The components include: a first rotating motor (1), a dosing hopper (2), a sewage inlet pipe (3), a flocculation box (4), a contact box (5), a sewage discharge pipe (6), a third rotating motor (7), a filter press area (8), a transmission chain (9), a separation tank (10), a scraping area (11), a support base (12), a transmission shaft (13), a scraping plate (14), a transmission wheel (15), a blower (16), a spiral blade (17), a rotating rod (18), a water outlet (19), an air inlet pipe (20), a connecting pipe (21), and a plurality of connecting pipes (22). 1), a second rotating motor (22), an air intake branch pipe (23), a disc aerator (24), a rotating disc (25), a support rod (26), a rotating blade (27), a slag collecting box (28), a mud inlet (29), an upper filter belt (30), a main upper pressure roller (31), a main lower pressure roller (32), a water outlet pipe (33), a lower filter belt (34), a mud discharge pipe (35), a partition plate (36), an upper pressure roller (37), a lower pressure roller (38), a mud inlet plate (39), and an oil absorption felt (40). DETAILED DESCRIPTION Example 1

[0011] The present invention provides an air flotation machine with a filter press structure as follows: The present invention provides an air flotation machine with a filter press structure as follows: The air flotation machine with a filter press structure comprises a scraping assembly, a filter press assembly, a flocculation assembly and a contact assembly. The scraper assembly comprises a separation tank (10), a partition plate (36), a scraper area (11), a filter press area (8), a scraper plate (14), a transmission chain (9), a transmission shaft (13), a third rotating motor (7), a support base (12), and a transmission wheel (15). The separation tank (10) is a square structure with an open top. A partition plate (36) is vertically disposed on the bottom surface of the separation tank (10). The height of the partition plate (36) is lower than the height of the separation tank (10). The partition plate (36) divides the inner cavity of the separation tank (10) into a scraping area (11) and a filter pressing area (8). The top of the scraping area (11) is flush with the top of the filter pressing area (8) and is connected to each other. The bottom surface height of the filter pressing area (8) is greater than the bottom surface height of the scraping area (11). The third rotating motor (7) is placed on one side of the top of the scraping area (11). Two sets of support bases (12) are symmetrically arranged on both sides of the top of the scraping area (11). Preferably, there are two supporting bases (12) in each group, and the two supporting bases (12) are respectively disposed at two ends of the scraping area (11). A transmission shaft (13) is rotatably disposed between the two groups of support bases (12). Transmission wheels (15) are respectively sleeved on both ends of the transmission shaft (13). One end of one of the transmission shafts (13) is connected to the motor shaft of the third rotating motor (7). The transmission wheels (15) are connected to each other via a transmission chain (9). The two ends of the scraper plate (14) are rotatably placed on the transmission chain (9) respectively. Preferably, there are a plurality of scraper plates (14), and the plurality of scraper plates (14) are arranged equidistantly along the length direction of the transmission chain (9). Preferably, the scraper plate (14) is an L-shaped structure. The filter press assembly is composed of a slag collecting box (28), a mud inlet (29), a mud discharge pipe (35), an upper pressure roller, a lower pressure roller, an upper filter belt (30), a lower filter belt (34) and a water outlet pipe (33). A mud inlet (29) is provided at the upper end of one side of the slag collecting box (28). Preferably, the width of the mud inlet (29) is equal to the width of the slag collecting box (28). Preferably, the slag collecting box (28) has a conical structure from two-thirds of the way to the bottom. The slag collecting box (28) is placed on the inner bottom surface of the filter press area (8) and is close to the partition plate (36). The height of the slag collecting box (28) is less than the height of the partition plate (36). One end of the mud discharge pipe (35) is placed in the middle of the bottom surface of the slag collecting box (28) through a through hole opened on the bottom surface of the filter press area (8), and is connected to the slag collecting box (28). One end of the water outlet pipe (33) is placed in the middle of the bottom surface of the filter press area (8) and is connected to the filter press area (8). A fourth rotating motor and a fifth rotating motor are disposed on one side of the filter press area (8). One end of the main upper pressure roller (31) is connected to the motor shaft of the fourth rotating motor through a through hole opened on a side surface of the filter press area (8). The other end of the main upper pressure roller (31) is placed on the other inner side of the filter press area (8) via a bearing. One end of the upper pressure roller (37) is placed on an inner side surface of the filter press area (8) through a bearing. The other end of the upper pressure roller (37) is placed on the other inner side of the filter press area (8) through a bearing. The upper pressure roller (37) is located above the slag collecting box (28) and close to the partition plate (36). The height of the main upper pressure roller (31) is greater than the height of the secondary upper pressure roller (37). The main upper pressure roller (31) and the secondary upper pressure roller (37) are connected via an upper filter belt (30). Preferably, one end of the upper filter belt (30) is in contact with the bottom surface of the scraper plate (14). One end of the main lower pressure roller (32) is connected to the motor shaft of the fifth rotating motor through a through hole opened on a side surface of the filter press area (8). The other end of the main lower pressure roller (32) is placed on the other inner side of the filter press area (8) via a bearing. A plurality of rollers are placed from one end of the lower pressure roller (38) to an inner side surface of the filter press area (8) through bearings. A plurality of bearings are placed from the other end of the lower pressure roller (38) to the other inner side of the filter press area (8), The main lower pressure roller (32) and the plurality of lower pressure rollers (38) are located below the upper pressure roller (37). The heights of the main lower pressure roller (32) and the plurality of secondary lower pressure rollers (38) gradually increase along the direction of scum transmission, then decrease in a V-shape and then increase again, and finally extend to the mud inlet (29). There is one secondary lower pressure roller (38) at each end of the V-shaped structure, and the bottom of the V-shaped structure is composed of two upper and lower secondary lower pressure rollers (38). The main lower pressure roller (32) and the plurality of secondary lower pressure rollers (38) are connected via a lower filter belt (34); Preferably, the width of the lower filter belt (34) is less than or equal to the width of the mud inlet (29); The contact assembly is composed of a contact box (5), a blower (16), an air intake pipe (20), a connecting pipe (21), an air intake branch pipe (23), a disc aerator (24), a second rotating motor (22), a support rod (26), a rotating disc (25), rotating blades (27) and a sewage discharge pipe (6). The contact box (5) is located outside the separation tank (10). The second rotating motor (22) is placed in the middle of the inner bottom surface of the contact box (5). The support rod (26) is located inside the contact box (5). The length of the support rod (26) is smaller than the height of the contact box (5). One end of the support rod (26) is connected to the motor shaft of the second rotating motor (22). A rotating disc (25) is sleeved on the side of the support rod (26). Preferably, there are a plurality of rotating discs (25), and the plurality of rotating discs (25) are arranged equidistantly along the length direction of the support rod (26). The side of the rotating disc (25) is provided with rotating blades (27). Preferably, there are a plurality of rotating blades (27), and the plurality of rotating blades (27) are arranged equidistantly in the circumferential direction of the side surface of the rotating disk (25). Preferably, the rotating blade (27) is an arc-shaped structure. The blower (16) is located outside the contact box (5). One end of the air inlet pipe (20) is connected to the air outlet of the blower (16), and is in communication with the air outlet of the blower (16). The connecting pipe (21) is placed on the inner bottom surface of the contact box (5). The connecting pipe (21) is a structure with both ends closed. Preferably, the connecting pipe (21) is parallel to a side surface of the contact box (5) and is close to a side surface of the contact box (5). Preferably, the length of the connecting pipe (21) is equal to the length of one side of the contact box (5). The other end of the air inlet pipe (20) passes through a through hole opened at the bottom of one side of the contact box (5) and is placed on the side of one end of the connecting pipe (21), and is connected to the side of one end of the connecting pipe (21). One end of the air intake branch pipe (23) is vertically placed on the side of the connecting pipe (21). The air intake branch pipe (23) is a structure with the other end being closed. Preferably, there are a plurality of the air intake branch pipes (23), and the plurality of the air intake branch pipes (23) are arranged equidistantly along the length direction of the side surface of the connecting pipe (21). Preferably, the length of the air intake branch pipe (23) is equal to the length of the other side surface of the contact box (5). The disc aerator (24) is placed on the top side of the air inlet branch pipe (23). Preferably, there are a plurality of the disc aerators (24), and the plurality of the disc aerators (24) are arranged equidistantly along the length direction of the air inlet branch pipe (23). One end of the sewage pipe (6) is placed on the side of the contact box (5) and is connected to the contact box (5). One end of the sewage discharge pipe (6) is close to the top surface of the contact box (5). The other end of the sewage discharge pipe (6) is placed at the bottom of the side of the scraping area (11) and is connected to the scraping area (11). The flocculation assembly is composed of a first rotating motor (1), a dosing hopper (2), a sewage inlet pipe (3), a rotating rod (18), a spiral blade (17), a flocculation box (4), and a water outlet hole (19). The flocculation box (4) is placed on the top surface of the contact box (5). One end of the dosing hopper (2) is placed on the top surface of the flocculation box (4) and is connected to the flocculation box (4). Preferably, the diameter of the dosing hopper (2) remains unchanged from one end to one third of the diameter, and gradually increases from one third of the diameter to the other end. The first rotating motor (1) is placed in the middle of the top surface of the flocculation box (4). The rotating rod (18) is placed in the flocculation box (4). One end of the rotating rod (18) is connected to the motor shaft of the first rotating motor (1) through a through hole opened in the middle of the flocculation box (4). The length of the rotating rod (18) is smaller than the height of the flocculation box (4). The spiral blade (17) is placed on the side of the rotating rod (18). Preferably, the length of the spiral blade (17) is equal to the length of the rotating rod (18). Preferably, a plurality of flow-disturbing protrusions are evenly arranged on the spiral blade (17). One end of the sewage inlet pipe (3) is placed on a side of the flocculation box (4) and is connected to the flocculation box (4). The bottom surface of the flocculation box (4) is provided with a water outlet hole (19), and the water outlet hole (19) is located on the side edge of the bottom surface of the flocculation box (4); When in use, sewage first enters the flocculation box (4) through the sewage inlet pipe (3), and the flocculant is added to the flocculation box (4) from the dosing hopper (2). The first rotating motor (1) is started, and the first rotating motor (1) drives the rotating rod (18) to rotate, and the rotating rod (18) drives the spiral blade (17) to rotate, so that the sewage and the flocculant are fully in contact with each other, a flocculation reaction occurs, and floccules are formed; then the floccules and sewage enter the contact box (5) through the water outlet hole (19), and the blower (16) is started. The gas in the blower (16) enters the connecting pipe (21) from the air inlet pipe (20), and enters the multiple inlet pipes (21) from the connecting pipe (21). The air branch pipe (23) enters the aeration generator through the air inlet pipe (23), and the aeration generator generates a large number of tiny bubbles. The second rotating motor (22) is started, and the second rotating motor (22) drives the support rod (26) to rotate. The support rod (26) drives the rotating disc (25) and the rotating blade (27) to rotate, so that the tiny bubbles are evenly distributed in various areas in the contact box (5), so that the flocs with a density less than that of water are fully bonded with the tiny bubbles to form foam flocs; finally, the foam flocs and sewage enter the scraping area (11) of the separation tank (10) through the sewage discharge pipe (6), and the foam flocs float to the scraping area under the action of buoyancy. When scum is formed on the water surface of the scraping zone (11), when the sewage in the scraping zone (11) reaches the height of the scraping plate (14), the third rotating motor (7) is started, the third rotating motor (7) drives the transmission shaft (13) to rotate, the transmission shaft (13) drives the transmission wheel (15) to rotate, the transmission wheel (15) drives the transmission chain (9) to rotate, and the transmission chain (9) drives a plurality of scraping plates to move from one end of the scraping zone (11) to the other end, so that the scum on the water surface of the scraping zone (11) can be scraped onto the upper filter belt (30) of the filter press zone (8), and the fourth rotating motor and the fifth rotating motor are started, and the fourth rotating motor drives the transmission wheel (15) to rotate. The main upper pressure roller (31) and the secondary upper pressure roller (37) are driven to rotate, and the main lower pressure roller (32) and the plurality of secondary lower pressure rollers (38) are driven to rotate via a fifth rotating motor. The floating scum moves along the upper filter belt (30) to between the upper and lower filter belts (34). The floating scum is squeezed between the upper and lower filter belts (34) to be dehydrated. The water in the floating scum is filtered by the upper and lower filter belts (34) and enters the bottom of the filter press area (8) to be discharged from the drainage pipe. The dehydrated floating scum enters the scum collecting box (28) through the mud inlet (29) and is discharged from the mud discharge pipe (35). This can reduce the water content of the floating scum and improve the sewage treatment effect. Example 2

[0012] The difference between this embodiment and embodiment 1 is that one side of the mud inlet plate (39) is placed at the bottom of the mud inlet (29), and the other side of the mud inlet plate (39) is close to one end of the lower filter belt (34); the mud inlet plate (39) is an arc-shaped structure, and the width of the mud inlet plate (39) is greater than or equal to the width of the lower filter belt (34); when in use, the dehydrated scum can enter the mud inlet (29) and the scum collecting box (28) along the mud inlet plate (39) as the lower filter belt (34) moves, thereby preventing a portion of the scum from not entering the mud inlet (29) due to a gap between the mud inlet (29) and the lower filter belt (34), and falling on the bottom surface of the filter press area (8), thereby reducing the sewage treatment effect; Example 3

[0013] The difference between this embodiment and embodiment 1 is that the bottom surface of the scraper plate (14) is covered with an oil-absorbing felt (40), and the length of the oil-absorbing felt (40) is equal to the length of the scraper plate (14); when in use, when the scraper plate (14) is used to scrape the scum on the water surface of the scraper area (11), the oil-absorbing felt (40) can make more scum adhere to the bottom of the scraper plate (14), and be transported by the scraper plate (14) to the filter press area (8) for dehydration treatment, so that the scraping efficiency is higher; The scraper plate (14) is designed to be rotatably disposed at both ends of the drive chain (9) so that after the scraper plate (14) scrapes the scum to the filter press area (8) as the drive chain (9) rotates, it can rotate upward and return to the starting point from the upper end of the drive chain (9) to start scraping the scum again; The scraper plate (14) is designed as an L-shaped structure. When the scraper plate (14) with the L-shaped structure is used to scrape the scum on the water surface of the scraper area (11), more scum can be collected in the L-shaped structure of the scraper plate (14) and transported to the filter press area (8) for dehydration treatment. This can prevent the scum from spilling during the movement of the scraper plate (14), thereby achieving a better scraping effect. The slag collecting box (28) is designed with a conical structure from two-thirds of the way to the bottom. The slag collecting box (28) with a conical bottom structure makes it easier for the dehydrated slag to enter the bottom of the slag collecting box (28) under the action of gravity and be discharged from the slag discharge pipe. The design that the height of the main upper pressure roller (31) is greater than the height of the secondary upper pressure roller (37) can gradually increase the height of the upper filter belt (30) along the direction of scum transmission. The upper filter belt (30) dehydrates the scum during movement, and water in the scum is discharged through the mesh of the upper filter belt (30), which can prevent the discharged water from flowing back into the scum and affecting the dehydration effect of the scum. The design in which one end of the upper filter belt (30) contacts the bottom surface of the scraper plate (14) enables the scraper plate (14) to scrape the scum directly onto the upper filter belt (30), thereby preventing a height difference between the upper filter belt (30) and the scraper plate (14), causing part of the scum to fall outside the upper filter belt (30); The heights of the main lower pressure roller (32) and the plurality of secondary lower pressure rollers (38) gradually increase along the direction of scum transmission, then decrease in a V-shape and then increase again, and finally extend to the mud inlet (29). There is one secondary lower pressure roller (38) at each end of the V-shaped structure, and the bottom of the V-shaped structure is designed to be composed of two upper and lower secondary lower pressure rollers (38). First, the spacing between the upper filter belt (30) and the lower filter belt (34) becomes smaller and smaller along the direction of scum transmission, which can increase the squeezing force between the upper filter belt (30) and the lower filter belt (34), thereby achieving a better dehydration effect on the scum. Then, the scum is separately transmitted by the lower filter belt (34), and the V-shaped secondary lower pressure roller (38) structure can squeeze the scum on the lower filter belt (34) again, further reducing the water content in the scum and improving the sewage treatment effect.

[0014] The purpose is to scrape the scum on the water surface of the scraping area (11) to the filter press area (8) through the scraping assembly, and to dehydrate the scum through the filter press assembly, thereby reducing the water content of the scum.

[0015] After considering the specification and practicing the invention disclosed herein, those skilled in the art will easily think of other similar embodiments of the present invention. This application is intended to cover any modified uses or adaptive changes of the present invention. These modifications or uses, applicability changes follow the general principles of the present invention and include common knowledge or customary technical means in the technical field that are not disclosed in the present invention.

[0016] It should be noted that, for the sake of simplicity, the specific implementation mode of the present invention describes the data processing process of the controller as a series of action combinations. However, those skilled in the art should know that the present invention is not limited to the described actions, because according to the present invention, certain steps can be performed sequentially or simultaneously. Secondly, those skilled in the art should also know that the actions described and involved in the specification are not necessarily required by the present invention. The described contents are only preferred implementation cases of the present invention and cannot be considered to limit the scope of implementation of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation modes and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. An air flotation machine with a filter press structure, characterized in that: The invention is composed of a scraping assembly, a filter press assembly, a contact assembly and a flocculation assembly. The scraping assembly is composed of a separation tank, a partition plate, a scraping area, a filter press area, a scraping plate, a transmission chain, a transmission shaft, a third rotating motor, a support base and a transmission wheel. The separation tank is a square structure with an open top. A partition plate is vertically arranged on the bottom surface of the separation tank. The partition plate divides the inner cavity of the separation tank into a scraping area and a filter press area. The third rotating motor is arranged on one side of the top of the scraping area. Two groups of support bases are symmetrically arranged on both sides of the top of the scraping area. There are two support bases in each group. The two support bases are respectively arranged on the At both ends of the scraping area, a transmission shaft is rotatably arranged between the two groups of support bases, and a transmission wheel is sleeved at both ends of the transmission shaft, one end of one of the transmission shafts is connected to the motor shaft of the third rotating motor, and the transmission wheels are connected by a transmission chain, and the two ends of the scraping plate are rotatably arranged on the transmission chain, and the filter press assembly consists of a slag collecting box, a mud inlet, a mud discharge pipe, an upper pressure roller, a lower pressure roller, an upper filter belt, a lower filter belt and a water outlet pipe. A mud inlet is provided at the upper end of one side of the slag collecting box, and the slag collecting box is placed on the inner bottom surface of the filter press area and close to the partition plate. The height of the slag collecting box is less than the height of the partition plate, one end of the mud discharge pipe is placed in the middle of the bottom surface of the slag collecting box through the through hole opened on the bottom surface of the filter press area, and is connected to the slag collecting box, one end of the water outlet pipe is placed in the middle of the bottom surface of the filter press area, and is connected to the filter press area, a fourth rotating motor and a fifth rotating motor are placed on one side of the filter press area, one end of the main upper pressure roller is connected to the motor shaft of the fourth rotating motor through the through hole opened on one side of the filter press area, the other end of the main upper pressure roller is placed on the other inner side surface of the filter press area through a bearing, and one end of the upper pressure roller is placed on the inner side of the filter press area through a bearing The other end of the upper pressure roller is placed on the other inner side of the filter press area through a bearing, the main upper pressure roller and the slave upper pressure roller are connected through an upper filter belt, one end of the main lower pressure roller is connected to the motor shaft of the fifth rotating motor through a through hole opened on one side of the filter press area, the other end of the main lower pressure roller is placed on the other inner side of the filter press area through a bearing, one end of a plurality of slave lower pressure rollers are respectively placed on an inner side of the filter press area through bearings, the other ends of a plurality of slave lower pressure rollers are respectively placed on the other inner side of the filter press area through bearings, the main lower pressure roller and the plurality of slave lower pressure rollers are connected through a lower filter belt;The contact assembly consists of a contact box, a blower, an air inlet pipe, a connecting pipe, an air inlet branch pipe, a disc aerator, a second rotating motor, a support rod, a rotating disc, rotating blades and a sewage pipe. The contact box is located outside the separation tank, the second rotating motor is placed in the middle of the inner bottom surface of the contact box, the support rod is located in the contact box, one end of the support rod is connected to the motor shaft of the second rotating motor, a rotating disc is sleeved on the side of the support rod, a rotating blade is placed on the side of the rotating disc, and the blower is located in the contact box. On the outside of the contact box body, one end of the air inlet pipe is connected to the air outlet of the blower and communicated with the air outlet of the blower, the connecting pipe is placed on the inner bottom surface of the contact box body, the connecting pipe is parallel to one side surface of the contact box body and close to one side surface of the contact box body, the other end of the air inlet pipe passes through a through hole opened at the bottom of one side surface of the contact box body and is placed on one end side surface of the connecting pipe and communicated with one end side surface of the connecting pipe, one end of the air inlet branch pipe is vertically placed on the side surface of the connecting pipe, and a disc aerator is placed on the inlet The top side of the air branch pipe, one end of the sewage discharge pipe is placed on the side of the contact box and is connected to the contact box, one end of the sewage discharge pipe is close to the top surface of the contact box, and the other end of the sewage discharge pipe is placed on the bottom of the side of the scraping area and is connected to the scraping area. The flocculation component consists of a first rotating motor, a dosing hopper, a sewage inlet pipe, a rotating rod, a spiral blade, a flocculation box and a water outlet. The flocculation box is placed on the top surface of the contact box, and one end of the dosing hopper is placed on the top surface of the flocculation box and is connected to the flocculation box. The first rotating motor is placed in the middle of the top surface of the flocculation box, the rotating rod is placed in the flocculation box, one end of the rotating rod is connected to the motor shaft of the first rotating motor through a through hole opened in the middle of the flocculation box, the length of the rotating rod is less than the height of the flocculation box, the spiral blade is placed on the side of the rotating rod, one end of the sewage inlet pipe is placed on one side of the flocculation box and is connected to the flocculation box, the bottom surface of the flocculation box is opened with a water outlet, and the water outlet is located on the side of the bottom surface of the flocculation box. ; 2. The air flotation machine with a filter press structure according to claim 1, characterized in that One side of the mud inlet plate is placed at the bottom of the mud inlet port, and the other side of the mud inlet plate is close to one end of the lower filter belt; the mud inlet plate is an arc structure, and the width of the mud inlet plate is greater than or equal to the width of the lower filter belt.

3. The air flotation machine with a filter press structure according to claim 1, characterized in that The bottom surface of the scraper plate is covered with oil-absorbing felt, and the length of the oil-absorbing felt is equal to the length of the scraper plate.

4. The air flotation machine with a filter press structure according to claim 1, characterized in that The height of the partition plate is lower than the height of the separation tank, the top of the scraping zone is flush with the top of the filter pressing zone and is connected, and the bottom height of the filter pressing zone is greater than the bottom height of the scraping zone.

5. The air flotation machine with a filter press structure according to claim 1, characterized in that There are multiple scraper plates, which are arranged equidistantly along the length direction of the transmission chain, and the scraper plates are L-shaped structures.

6. The air flotation machine with a filter press structure according to claim 1, characterized in that The width of the mud inlet is equal to the width of the slag collecting box, and the slag collecting box is in a conical structure from two-thirds to the bottom surface.

7. The air flotation machine with a filter press structure according to claim 1, characterized in that The secondary upper pressure roller is located above the slag collecting box and close to the partition plate, and the height of the main upper pressure roller is greater than the height of the secondary upper pressure roller.

8. The air flotation machine with a filter press structure according to claim 1, characterized in that One end of the upper filter belt is in contact with the bottom surface of the scraper plate, the main lower pressure roller and the multiple slave lower pressure rollers are located below the upper slave pressure roller, the heights of the main lower pressure roller and the multiple slave lower pressure rollers gradually increase along the direction of scum transmission, then decrease in a V-shape and then increase again, and finally extend to the mud inlet, there is a slave lower pressure roller at each end of the V-shaped structure, the bottom of the V-shape is composed of two upper and lower slave lower pressure rollers, and the width of the lower filter belt is less than or equal to the width of the mud inlet.

9. The air flotation machine with a filter press structure according to claim 1, characterized in that The length of the support rod is smaller than the height of the contact box, there are multiple rotating discs, and the multiple rotating discs are equidistantly arranged along the length direction of the support rod, there are multiple rotating blades, and the multiple rotating blades are equidistantly arranged along the circumferential direction of the side of the rotating disc, and the rotating blades are of an arc-shaped structure, the connecting pipe is a structure closed at both ends, and the length of the connecting pipe is equal to the length of one side of the contact box, the air intake branch pipe is a structure closed at the other end, there are multiple air intake branch pipes, and the multiple air intake branch pipes are equidistantly arranged along the length direction of the side of the connecting pipe, and the length of the air intake branch pipe is equal to the length of the other side of the contact box, and there are multiple disc aerators, and the multiple disc aerators are equidistantly arranged along the length direction of the air intake branch pipe.

10. The air flotation machine with a filter press structure according to claim 1, characterized in that The diameter of the dosing hopper remains unchanged from one end to one third of the diameter, and gradually increases from the one third of the diameter to the other end. The length of the spiral blade is equal to the length of the rotating rod, and a plurality of spoiler protrusions are evenly arranged on the spiral blade.

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