A carbon and nitrogen domestic sewage water treatment device

Abstract

The present invention relates to the field of sewage treatment, and particularly to a carbon and nitrogen domestic sewage water treatment device. The technical problem to be solved is that it is currently difficult to agitate the sludge settled at the bottom, and it is difficult for oxygen and aerobic bacteria strains to fully enter the sewage and the sludge settled at the bottom, resulting in slow growth and difficulty in enrichment of aerobic microbial communities. A carbon and nitrogen domestic sewage water treatment device includes a base, a cylinder body, a water inlet pipe, etc.; the cylinder body is installed on the base, and two water inlet pipes are installed on one side of the upper part of the cylinder body. In the present invention, the motor drives the hollow bent pipe and the bent scraper to rotate to scrape the sludge settled at the bottom of the cylinder body. The hollow bent pipe and the bent scraper also agitate the sewage, so that the aerobic bacteria strains falling into the sewage can be evenly mixed into the sewage water body and the sludge, and the gas discharged from the exhaust check valve can also be fully mixed into the sewage water body and the sludge, thereby accelerating the enrichment speed of aerobic microbial communities and further improving the efficiency of sewage treatment.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and particularly to a carbon and nitrogen domestic sewage water treatment device. Background Art

[0002] When treating domestic sewage water containing carbon and nitrogen, generally, the method of microbial degradation is adopted. Since there are many fine solids in the sewage, after the sewage stands still for a period of time, the fine solids will sink to the bottom to form sludge. It is difficult for oxygen and aerobic bacteria strains to fully enter the sludge at the bottom, resulting in slow growth and difficulty in enrichment of the aerobic bacteria microbiota, which leads to a long reactor startup time and a low total nitrogen removal load, and further reduces the sewage treatment efficiency.

[0003] Currently, a shovel or the like is used to stir the sludge at the bottom. However, since the sludge is in the sewage, it is necessary to overcome the resistance of the water body when using a shovel, making it difficult to stir thoroughly. Moreover, the sludge will move with the flow of the water, making it difficult to fully crush the agglomerated sludge. After the sludge has settled at the bottom for a long time, scale will also form at the bottom of the cylinder, and it is difficult for manual labor to shovel the scale. Summary of the Invention

[0004] In order to overcome the current difficulty in stirring the sludge at the bottom, and the fact that it is difficult for oxygen and aerobic bacteria strains to fully enter the sludge at the bottom, resulting in slow growth and difficulty in enrichment of the aerobic bacteria microbiota, the present invention provides a carbon and nitrogen domestic sewage water treatment device and its treatment method that can stir the sludge more thoroughly, can more comprehensively crush the agglomerated sludge, enable oxygen and aerobic bacteria strains to fully enter the sewage and sludge, and improve the sewage treatment efficiency.

[0005] The technical solution is: a carbon and nitrogen domestic sewage water treatment device, comprising a base, a cylinder, a water inlet pipe, a drain pipe, a filling box, a scraping mechanism, and an aeration mechanism. The base is provided with a cylinder, two water inlet pipes are installed on one side of the upper part of the cylinder, both water inlet pipes are communicated with the cylinder, two drain pipes are installed at the lower part of the cylinder, both drain pipes are communicated with the cylinder, a filling box is installed on the cylinder, both the upper and lower sides of the filling box are open, a scraping mechanism is installed on the cylinder, the scraping mechanism is used for scraping the sludge deposited in the cylinder, and an aeration mechanism is provided on the cylinder and the scraping mechanism, and the aeration mechanism is used for aerating and oxygenating the water body.

[0006] Further, the scraping mechanism includes a hollow bent pipe, a bent scraper, an exhaust check valve, a motor, and a transmission assembly. A hollow bent pipe is rotatably installed inside the cylinder body. Both ends of the hollow bent pipe pass through both sides of the cylinder body respectively. One end of the hollow bent pipe is provided with a sector-shaped hole, and the other end of the hollow bent pipe is sealed. A bent scraper is installed in the middle of the hollow bent pipe, and the bent scraper is attached to the inner side wall of the cylinder body. A number of exhaust check valves are evenly spaced and installed in the middle of the hollow bent pipe. A motor is installed at the bottom outside the cylinder body, and a transmission assembly is connected between the output shaft of the motor and the end of the hollow bent pipe where the sector-shaped hole is opened.

[0007] Further, the transmission assembly consists of two belt pulleys and a flat belt. One belt pulley is installed on the output shaft of the motor, and another belt pulley is installed at the end of the hollow bent pipe where the sector-shaped hole is opened. The flat belt is wound between the two belt pulleys.

[0008] Further, the aeration mechanism includes a mounting frame, an air inlet pipe, and a sector plate. Two mounting frames are installed on one side of the cylinder body close to the sector-shaped hole. An air inlet pipe is installed between the two mounting frames. One end of the air inlet pipe is rotatably connected to the end of the hollow bent pipe where the sector-shaped hole is opened. A sector plate is installed on the side of the air inlet pipe close to the sector-shaped hole, and the sector plate is attached to the sector-shaped hole.

[0009] Further, a dispersion mechanism is also included. The dispersion mechanism is arranged on the cylinder body and the hollow bent pipe and is used to disperse the agglomerated sludge. The dispersion mechanism includes a dispersion frame, a gear, a sliding frame, a rack, a roller, and a corrugated groove cylinder. A number of dispersion frames are rotatably arranged at equal intervals on the hollow bent pipe, and a gear is installed at the bottom of each dispersion frame. Each gear is located inside the hollow bent pipe. A sliding frame is slidably arranged inside the hollow bent pipe, and one end of the sliding frame slidably passes through the sealed end of the hollow bent pipe. A rack is installed inside the sliding frame, and each gear meshes with the rack. A roller is installed on the sliding frame that passes through the sealed end of the hollow bent pipe. A corrugated groove cylinder is installed on one side of the cylinder body close to the water inlet pipe. Corrugated grooves are opened in the corrugated groove cylinder, and the roller is located in the corrugated grooves of the corrugated groove cylinder.

[0010] Further, a bottom scraping mechanism is also included. The bottom scraping mechanism is arranged on the hollow bent pipe and the sliding frame and is used to scrape the dirt attached to the inner side of the cylinder body. The bottom scraping mechanism includes a cross frame and a scraping plate. A cross frame is slidably arranged on the hollow bent pipe, and a number of scraping plates are evenly spaced and installed on the cross frame. Both ends of the cross frame are respectively connected to both sides of the sliding frame.

[0011] Further, a connecting frame and a baffle are also included. A connecting frame is slidably arranged in the middle of the filling box. One end of the connecting frame is rotatably connected to the sliding frame that passes through the sealed end of the hollow bent pipe. A number of baffles are evenly spaced and installed in the middle of the connecting frame. All the baffles are located inside the filling box, and all the baffles are attached to the inner side wall of the filling box.

[0012] Furthermore, it also includes arc-shaped baffles, and two arc-shaped baffles are installed on the cylinder body.

[0013] The beneficial effects of the present invention are as follows: 1. By driving the hollow bent pipe and the bent scraper to rotate through the motor to scrape the sludge settled at the bottom of the cylinder body, the hollow bent pipe and the bent scraper also agitate the sewage, so that the aerobic bacteria falling into the sewage can be evenly mixed into the sewage water body and the sludge, and the gas discharged from the exhaust check valve can also be fully mixed into the sewage water body and the sludge, thereby accelerating the speed of aerobic bacteria group microbial enrichment, and further improving the efficiency of sewage treatment.

[0014] 2. By the reciprocating movement of the rack to drive the sixteen gears to continuously rotate back and forth, the sixteen gears drive the sixteen dispersing frames to continuously rotate back and forth, and the sixteen dispersing frames can disperse the scraped sludge, so that the agglomerated sludge can be broken into fine sludge, so that both aerobic bacteria and oxygen can fully enter the sludge, thereby accelerating the speed of aerobic bacteria group enrichment and further improving the efficiency of sewage treatment.

[0015] 3. When the shovel plate contacts the inner side wall of the cylinder body, it also moves back and forth continuously, and the shovel plate can shovel the scale adhering to the inner side of the cylinder body, thereby preventing some scale that is difficult to scrape from remaining in the cylinder body all the time, and further enabling the sludge to be more fully agitated and dispersed, further accelerating the speed of aerobic bacteria group enrichment, and further improving the efficiency of sewage treatment. Description of the Drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the scraping mechanism and the aeration mechanism of the present invention.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the present invention.

[0018] Figure 3 It is a sectional three-dimensional structural schematic diagram of the present invention.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the dispersing mechanism and the bottom shoveling mechanism of the present invention.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the hollow bent pipe, the intake pipe and the sector plate of the present invention.

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the hollow bent pipe, the sector holes and the intake pipe of the present invention.

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the dispersing mechanism of the present invention.

[0023] Figure 8 It is a sectional three-dimensional structural schematic diagram of the corrugated trough cylinder of the present invention.

[0024] Figure 9 This is a partial three-dimensional structural schematic diagram of the dispersing mechanism and the bottom scraping mechanism of the present invention.

[0025] Figure 10 This is a three-dimensional structural schematic diagram of the dispersing mechanism of the present invention.

[0026] Figure 11 This is a split three-dimensional structural schematic diagram of some parts of the hollow bent pipe, the dispersing mechanism and the bottom scraping mechanism of the present invention.

[0027] Reference numerals in the drawings: 1 - base, 2 - cylinder, 3 - water inlet pipe, 4 - drain pipe, 5 - filling box, 61 - hollow bent pipe, 611 - fan-shaped hole, 62 - bent scraping plate, 63 - exhaust check valve, 64 - motor, 65 - transmission assembly, 71 - mounting frame, 72 - air inlet pipe, 73 - fan-shaped plate, 81 - dispersing frame, 82 - gear, 83 - sliding frame, 84 - rack, 85 - roller, 86 - corrugated groove cylinder, 91 - cross frame, 92 - scraping plate, 10 - connecting frame, 11 - dialing plate, 12 - arc-shaped baffle. Detailed implementation manners

[0028] The present invention will be further described below in conjunction with the embodiments shown in the drawings.

[0029] Embodiment 1: A carbon and nitrogen domestic sewage water treatment device, as Figures 1 - 6 shown, includes a base 1, a cylinder 2, a water inlet pipe 3, a drain pipe 4, a filling box 5, a scraping mechanism and an aeration mechanism. A cylinder 2 is welded on the base 1. Two water inlet pipes 3 are installed on one side of the upper part of the cylinder 2. Both water inlet pipes 3 are communicated with the cylinder 2. Two drain pipes 4 are installed on the lower part of the cylinder 2. Both drain pipes 4 are communicated with the cylinder 2. A filling box 5 is installed on the cylinder 2 through bolts. Both the upper and lower sides of the filling box 5 are open. The filling box 5 is located directly above the cylinder 2. A scraping mechanism is installed on the cylinder 2. The scraping mechanism is used for scraping the sludge deposited in the cylinder 2. An aeration mechanism is provided on the cylinder 2 and the scraping mechanism. The aeration mechanism is used for aerating and oxygenating the water body.

[0030] The scraping mechanism includes a hollow bent pipe 61, a bent scraping plate 62, an exhaust check valve 63, a motor 64 and a transmission assembly 65. A hollow bent pipe 61 is rotatably installed in the cylinder 2. Both ends of the hollow bent pipe 61 pass through both sides of the cylinder 2 respectively. A fan-shaped hole 611 is opened at one end of the hollow bent pipe 61. The other end of the hollow bent pipe 61 is sealed. A bent scraping plate 62 is installed in the middle of the hollow bent pipe 61. The bent scraping plate 62 is attached to the inner side wall of the cylinder 2. A plurality of exhaust check valves 63 are evenly spaced and installed in the middle of the hollow bent pipe 61. A motor 64 is installed at the bottom of the cylinder 2. A transmission assembly 65 is connected between the output shaft of the motor 64 and the end of the hollow bent pipe 61 where the fan-shaped hole 611 is opened.

[0031] The transmission assembly 65 is composed of two pulleys and a flat belt. A pulley is installed on the output shaft of the motor 64, and another pulley is installed on one end of the hollow curved pipe 61 with a fan-shaped hole 611, and a flat belt is wound between the two pulleys.

[0032] The aeration mechanism includes a mounting frame 71, an air inlet pipe 72 and a fan-shaped plate 73. Two mounting frames 71 are installed on one side of the cylinder 2 close to the fan-shaped hole 611 by bolts, and an air inlet pipe 72 is installed between the two mounting frames 71. One end of the air inlet pipe 72 is rotatably connected to one end of the hollow curved pipe 61 with the fan-shaped hole 611. A fan-shaped plate 73 is installed on one side of the air inlet pipe 72 close to the fan-shaped hole 611, and the fan-shaped plate 73 fits the fan-shaped hole 611.

[0033] The operator first connects the sewage source to the two water inlet pipes 3, and the sewage is discharged into the cylinder 2 through the two water inlet pipes 3. After the cylinder 2 is injected with an appropriate amount of sewage, the water injection is stopped. Then the operator puts an appropriate amount of aerobic bacteria into the filling box 5, and the aerobic bacteria evenly falls into the sewage through the bottom of the filling box 5. The operator then starts the motor 64 to rotate, and the hollow curved pipe 61, the fan-shaped hole 611, the curved scraper 62 and the exhaust check valve 63 are driven to rotate through the transmission component 65, and the curved scraper 62 can scrape the cylinder 2 The operator connects an air pipe to the air inlet pipe 72. Initially, the fan-shaped plate 73 and the fan-shaped hole 611 are staggered. The gas enters the hollow curved pipe 61 from the fan-shaped hole 611 through the air inlet pipe 72. The gas is then discharged into the sewage body through a number of exhaust check valves 63. As the hollow curved pipe 61, the fan-shaped hole 611, the curved scraper 62 and the exhaust check valve 63 rotate, the fan-shaped plate 73 gradually overlaps with the fan-shaped hole 611. When the hollow curved pipe 61 and the exhaust check valve 63 are After leaving the sewage body, the fan-shaped plate 73 completely covers the fan-shaped hole 611, and the gas no longer enters the hollow curved pipe 61. The motor 64 drives the hollow curved pipe 61 and the curved scraper 62 to rotate and scrape the sludge at the bottom of the cylinder 2. The hollow curved pipe 61 and the curved scraper 62 also stir the sewage, and the aerobic bacteria that fall into the sewage can be evenly mixed into the sewage water body and the sludge. The gas discharged from the exhaust check valve 63 can also be fully mixed into the sewage water body and the sludge, thereby accelerating the microbial growth of the aerobic bacteria. The speed of biological enrichment can improve the efficiency of sewage treatment; after stirring and aeration, the operator turns off the motor 64 and then closes the air pipe. Every 24 hours, the device is started to operate once, so as to avoid the lack of oxygen in the sludge after the sludge sinks to the bottom and reduce the speed of aerobic bacterial enrichment. After the aerobic bacterial microorganisms are activated and attached to the bacterial bed and reproduce and reach an active state, the operator opens the water inlet pipe 3 and the drain pipe 4, so that the cylinder 2 can normally flow in and out of water to treat the sewage.

[0034] Embodiment 2: Based on embodiment 1, Figures 7 - 11As shown in the figure, it further includes a crushing mechanism, which is arranged on the cylinder body 2 and the hollow bent pipe 61. The crushing mechanism is used to crush the agglomerated sludge. The crushing mechanism includes a crushing frame 81, a gear 82, a sliding frame 83, a rack 84, a roller 85 and a corrugated groove cylinder 86. Sixteen crushing frames 81 are rotatably arranged on the hollow bent pipe 61 at equal intervals through waterproof bearings. A gear 82 is installed at the bottom of each crushing frame 81. Each gear 82 is located inside the hollow bent pipe 61. A sliding frame 83 is slidably arranged inside the hollow bent pipe 61. One end of the sliding frame 83 slidably penetrates through the sealed end of the hollow bent pipe 61. A rack 84 is installed inside the sliding frame 83. The sixteen gears 82 are all meshed with the rack 84. A roller 85 is installed on the sliding frame 83 that penetrates through the sealed end of the hollow bent pipe 61. A corrugated groove cylinder 86 is installed on one side of the cylinder body 2 close to the two water inlet pipes 3. A corrugated groove is opened inside the corrugated groove cylinder 86. The roller 85 is located in the corrugated groove of the corrugated groove cylinder 86.

[0035] It further includes a bottom scraping mechanism, which is arranged on the hollow bent pipe 61 and the sliding frame 83. The bottom scraping mechanism is used to scrape the dirt adhering to the inner wall of the cylinder body 2. The bottom scraping mechanism includes a cross frame 91 and a scraping plate 92. A cross frame 91 is slidably arranged on the hollow bent pipe 61. A plurality of scraping plates 92 are evenly installed on the cross frame 91 at equal intervals. The two ends of the cross frame 91 are respectively connected to the two sides of the sliding frame 83.

[0036] When the hollow bent pipe 61 rotates, it drives the crushing frame 81, the gear 82, the sliding frame 83, the rack 84 and the roller 85 to rotate. The roller 85 rotates in the corrugated groove of the corrugated groove cylinder 86. Under the action of the corrugated groove on the corrugated groove cylinder 86, the roller 85 and the sliding frame 83 will move reciprocally. The sliding frame 83 will drive the rack 84 to move reciprocally. The reciprocating movement of the rack 84 drives the sixteen gears 82 to continuously rotate reciprocally. The sixteen gears 82 drive the sixteen crushing frames 81 to continuously rotate reciprocally. The sixteen crushing frames 81 can crush the scraped sludge, so that the agglomerated sludge can be broken into fine sludge, so that the aerobic bacteria and oxygen can fully enter the sludge, thereby accelerating the enrichment speed of the aerobic bacteria group and further improving the sewage treatment efficiency.

[0037] The rotation of the hollow bent pipe 61 will drive the scraping plate 92 to contact the inner side wall of the cylinder body 2. The movement of the sliding frame 83 drives the cross frame 91 and the scraping plate 92 to move reciprocally continuously. When the scraping plate 92 contacts the inner side wall of the cylinder body 2, it also moves reciprocally continuously. The scraping plate 92 can scrape the dirt adhering to the inner wall of the cylinder body 2, thereby preventing some dirt that is difficult to scrape from remaining in the cylinder body 2 all the time, so that the sludge can be stirred and crushed more fully, further accelerating the enrichment speed of the aerobic bacteria group, and further improving the sewage treatment efficiency.

[0038] Embodiment 3: On the basis of Embodiment 2, as Figures 1 - 4As shown in the figure, it further includes a connecting frame 10 and a dialing plate 11. A connecting frame 10 is slidably arranged in the middle of the filling box 5. One end of the connecting frame 10 is rotatably connected to a sliding frame 83 at the end sealed on the hollow bent pipe 61. A plurality of dialing plates 11 are evenly spaced and installed in the middle of the connecting frame 10. All the dialing plates 11 are located in the filling box 5 and all the dialing plates 11 are in contact with the inner side wall of the filling box 5.

[0039] It further includes an arc-shaped baffle 12, and two arc-shaped baffles 12 are installed on the cylinder body 2.

[0040] The organic matter in the sewage is limited. During the reproduction process of aerobic bacteria, a large amount of organic matter is needed. By manually adding nutrient sources such as glucose, urea, and dihydrogen phosphate into the filling box 5, when the sliding frame 83 reciprocates, it drives the connecting frame 10 and the dialing plate 11 to move. The continuous reciprocating movement of the dialing plate 11 can stir the nutrient sources in the filling box 5, so that the nutrient sources in the filling box 5 evenly fall into the sewage, thereby further accelerating the enrichment speed of aerobic bacteria.

[0041] Under the shielding effect of the arc-shaped baffle 12, when the hollow bent pipe 61 and the shovel plate 92 stir the sewage, it can prevent the hollow bent pipe 61 and the shovel plate 92 from driving the sewage to splash out of the cylinder body 2.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A carbon and nitrogen domestic sewage water treatment device, characterized in that: It includes a base (1), a cylinder body (2), a water inlet pipe (3), a drain pipe (4), a filling box (5), a scraping mechanism and an aeration mechanism. The cylinder body (2) is installed on the base (1). Two water inlet pipes (3) are installed on one side of the upper part of the cylinder body (2). Both of the two water inlet pipes (3) are communicated with the cylinder body (2). Two drain pipes (4) are installed on the lower part of the cylinder body (2). Both of the two drain pipes (4) are communicated with the cylinder body (2). A filling box (5) is installed on the cylinder body (2). Both the upper and lower sides of the filling box (5) are open. A scraping mechanism is installed on the cylinder body (2). The scraping mechanism is used for scraping the sludge deposited in the cylinder body (2). An aeration mechanism is arranged on the cylinder body (2) and the scraping mechanism. The aeration mechanism is used for aerating and oxygenating the water body; The scraping mechanism includes a hollow bent pipe (61), a bent scraping plate (62), an exhaust check valve (63), a motor (64) and a transmission component (65). A hollow bent pipe (61) is rotatably installed in the cylinder body (2). The two ends of the hollow bent pipe (61) respectively pass through the two sides of the cylinder body (2). A fan-shaped hole (611) is opened at one end of the hollow bent pipe (61). The other end of the hollow bent pipe (61) is sealed. A bent scraping plate (62) is installed in the middle of the hollow bent pipe (61). The bent scraping plate (62) is attached to the inner side wall of the cylinder body (2). A number of exhaust check valves (63) are evenly spaced and installed in the middle of the hollow bent pipe (61). A motor (64) is installed at the outer bottom of the cylinder body (2). A transmission component (65) is connected between the output shaft of the motor (64) and the end of the hollow bent pipe (61) where the fan-shaped hole (611) is opened; A dispersing mechanism is arranged on the cylinder body (2) and the hollow bent pipe (61). The dispersing mechanism is used for dispersing the agglomerated sludge; A bottom scraping mechanism is arranged on the hollow bent pipe (61).

2. The carbon and nitrogen domestic sewage water treatment device according to claim 1, characterized in that: The transmission component (65) is composed of two belt pulleys and a flat belt. A belt pulley is installed on the output shaft of the motor (64). Another belt pulley is installed at the end of the hollow bent pipe (61) where the fan-shaped hole (611) is opened. A flat belt is wound between the two belt pulleys.

3. The carbon and nitrogen domestic sewage water treatment device according to claim 2, characterized in that: The aeration mechanism includes a mounting frame (71), an air inlet pipe (72) and a fan-shaped plate (73). Two mounting frames (71) are installed on one side of the cylinder body (2) close to the fan-shaped hole (611). An air inlet pipe (72) is installed between the two mounting frames (71). One end of the air inlet pipe (72) is rotatably connected to the end of the hollow bent pipe (61) where the fan-shaped hole (611) is opened. A fan-shaped plate (73) is installed on the side of the air inlet pipe (72) close to the fan-shaped hole (611). The fan-shaped plate (73) is attached to the fan-shaped hole (611).

4. The carbon and nitrogen domestic sewage water treatment device according to claim 3, characterized in that: The dispersion mechanism includes a dispersion frame (81), a gear (82), a sliding frame (83), a rack (84), a roller (85) and a corrugated drum (86). A number of dispersion frames (81) are rotatably arranged at uniform intervals on the hollow bent pipe (61). A gear (82) is installed at the bottom of each dispersion frame (81). Each gear (82) is located inside the hollow bent pipe (61). A sliding frame (83) is slidably arranged inside the hollow bent pipe (61). One end of the sliding frame (83) slidably penetrates through the sealed end of the hollow bent pipe (61). A rack (84) is installed inside the sliding frame (83). Each gear (82) meshes with the rack (84). A roller (85) is installed on the sliding frame (83) that penetrates through the sealed end of the hollow bent pipe (61). A corrugated drum (86) is installed on one side of the cylinder body (2) close to the water inlet pipe (3). A corrugated groove is formed inside the corrugated drum (86). The roller (85) is located in the corrugated groove of the corrugated drum (86).

5. The carbon and nitrogen domestic sewage water treatment device according to claim 4, characterized in that: It further includes a bottom scraping mechanism. The bottom scraping mechanism is arranged on the hollow bent pipe (61) and the sliding frame (83). The bottom scraping mechanism is used for scraping the dirt attached inside the cylinder body (2). The bottom scraping mechanism includes a cross frame (91) and a scraping plate (92). A cross frame (91) is slidably arranged on the hollow bent pipe (61). A number of scraping plates (92) are installed at uniform intervals on the cross frame (91). The two ends of the cross frame (91) are respectively connected to the two sides of the sliding frame (83).

6. The carbon and nitrogen domestic sewage water treatment device according to claim 5, characterized in that: It further includes a connecting frame (10) and a baffle plate (11). A connecting frame (10) is slidably arranged in the middle of the filling box (5). One end of the connecting frame (10) is rotatably connected to the sliding frame (83) that penetrates through the sealed end of the hollow bent pipe (61). A number of baffle plates (11) are installed at uniform intervals in the middle of the connecting frame (10). All the baffle plates (11) are located inside the filling box (5). All the baffle plates (11) are in contact with the inner side wall of the filling box (5).

7. The carbon and nitrogen domestic sewage water treatment device according to claim 1, characterized in that: It further includes an arc-shaped baffle (12). Two arc-shaped baffles (12) are installed on the cylinder body (2).

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