A low-carbon and energy-saving sewage treatment device and treatment method

Abstract

The present invention discloses a low-carbon and energy-saving sewage treatment device and treatment method, and relates to the technical field of sewage treatment devices. A low-carbon and energy-saving sewage treatment method comprises an anaerobic zone, a primary aerobic zone, a primary anoxic zone, a secondary anoxic zone, a secondary aerobic zone, and a sedimentation zone, wherein the nitrification liquid reflux volume is 20% to 50% of the water inlet volume, and the volume ratio of each zone is 1: (1~2): (1~4): (0.2~0.5): (0.2~0.5); a dynamic disturbance penetration channel, at least one of which is opened on the blocking ball, and the dynamic disturbance penetration channel penetrates the blocking ball; the present invention further improves the randomness of the blocking ball in the aeration ball shell, that is, improves the randomness of the opening position of the aeration hole, thereby enhancing the disturbance to the pool bottom and improving the aeration effect, thereby saving aeration energy compared to the aeration method of the prior art, thereby achieving low-carbon and energy-saving sewage treatment.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment devices, and in particular, relates to a low-carbon and energy-saving sewage treatment device. Background Art

[0002] In the sewage treatment process, the dissolved oxygen content in the sewage is increased through the aeration device. Since the sewage aeration time is long, the sludge will be compacted due to its own weight when it accumulates at the bottom of the aeration tank for a long time, forming sludge compaction, which will reduce the effective volume of the aeration tank and affect the sewage aeration effect.

[0003] In the prior art, the authorization announcement number is: CN115028275B, the authorization announcement date is 2023.08.01, and the name is an aeration head and treatment method for treating sludge in an aeration tank of a sewage treatment plant. The aeration head for treating sludge in an aeration tank of a sewage treatment plant includes: an aeration head, an air flow space is formed inside the aeration head; aeration holes are formed through the outer wall surface of the aeration head; an air inlet end is arranged on the aeration head and connected to the air flow space; wherein the aeration head is a spherical structure, a hemispherical structure or a tubular structure; when the aeration head is a spherical structure, the aeration holes are evenly distributed on the circumferential outer wall surface of the aeration head; when the aeration head is a hemispherical structure, the aeration holes are evenly distributed on the circumferential outer wall surface of the aeration head except the top surface; and when the aeration head is a tubular structure, the aeration holes are evenly distributed along the length direction of the aeration head. The present invention can improve the aeration condition at the bottom of the aeration tank, thereby preventing sludge from accumulating at the bottom of the tank, thereby improving the treatment efficiency of the aeration tank;

[0004] This prior art uses the gas sprayed from the aeration head to blow toward the sludge, so that the sludge is turned over, thereby improving the aeration effect. Specifically, the gas blows the blocking balls, so that the blocking balls randomly block the aeration holes on the aeration head, and open the aeration holes facing the sludge, thereby improving the aeration effect on the bottom of the pool.

[0005] However, there are certain problems with the prior art. It is recorded in the technology that the sealing ball is solid. Therefore, when the gas blows the sealing ball, there is a high probability that the sealing ball will move in a relatively regular and random state with a small range of movement in the aeration head for a relatively long time. This results in uneven sealing of the spherical aeration holes, which leads to poor actual random sealing effect, and further leads to poor required aeration effect. For this reason, a low-carbon and energy-saving sewage treatment device is proposed, which is used to enhance the aeration effect of the sewage pool through structural improvements, thereby achieving low-carbon and energy-saving sewage treatment. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a low-carbon and energy-saving sewage treatment device that can overcome the above problems or at least partially solve the above problems.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a sewage treatment method, comprising the following steps: setting an inlet, an anaerobic zone, a primary aerobic zone, a primary anoxic zone, a secondary anoxic zone, a secondary aerobic zone, a sedimentation zone, and an outlet, the sewage flows through the anaerobic zone, the primary aerobic zone, the primary anoxic zone, the secondary anoxic zone, the secondary aerobic zone, the sedimentation zone in sequence through the inlet, and then the outlet is sent to the next unit;

[0008] Sludge return: return from the sedimentation tank to the anaerobic zone;

[0009] Nitrification liquid reflux: reflux from the primary anoxic zone to the anaerobic zone, the reflux volume is 20% to 50% of the influent volume;

[0010] When the ammonia nitrogen value in the primary anoxic zone is higher than 1 / 2 of the outlet water limit, gas is pumped into the aeration ball shell through the air supply pipe, and the gas is discharged through the aeration holes to produce aeration. When the gas enters the aeration ball shell, it drives the blocking balls in the cavity to move randomly, dynamically and randomly blocking the aeration holes, thereby increasing the aeration volume in the primary anoxic zone.

[0011] A low-carbon and energy-saving sewage treatment device comprises: an aeration ball shell, wherein a cavity is provided in the aeration ball shell; aeration holes are evenly provided on the aeration ball shell and are connected to the cavity; a first connecting pipe is connected to the aeration ball shell and is used to supply gas to the cavity; a blocking ball, wherein at least one blocking ball is placed in the cavity; and a dynamic disturbance penetration channel, wherein at least one of the dynamic disturbance penetration channels is provided on the blocking ball, wherein the dynamic disturbance penetration channel penetrates the blocking ball, and when the first connecting pipe supplies gas to the cavity, when the first connecting pipe supplies gas to the cavity, the dynamic disturbance penetration channel penetrates the blocking ball. When the gas in a connecting pipe blows toward the surface of the sealing ball, the sealing ball moves dynamically and randomly in the cavity and randomly blocks the aeration holes; when the sealing ball moves dynamically and randomly in the cavity, when the air inlet end of the first connecting pipe is opposite to the dynamic disturbance through-channel, the airflow of the first connecting pipe directly passes through the sealing ball through the dynamic disturbance through-channel, and the thrust of the airflow on the sealing ball is weakened; a grid-like concave-convex pattern is arranged on the surface of the sealing ball to clean the inner wall of the sealing ball when the sealing ball moves in the cavity.

[0012] Preferably, when there is one sealing ball in the cavity, the ratio between the outer diameter of the sealing ball and the inner diameter of the aeration ball shell is 0.65-0.75:1.

[0013] Preferably, when there are two sealing balls in the cavity, the ratio between the outer diameter of the sealing balls and the inner diameter of the aeration ball shell is 0.3-0.38:1.

[0014] Preferably, when there are two sealing balls in the cavity, the ratio between the outer diameter of the sealing balls and the inner diameter of the aeration ball shell is 0.48:1.

[0015] Preferably, when there are three sealing balls in the cavity, the ratio between the outer diameter of the sealing balls and the inner diameter of the aeration ball shell is 0.3-0.38:1.

[0016] Preferably, when there are three sealing balls in the cavity, the ratio between the outer diameter of the sealing balls and the inner diameter of the aeration ball shell is 0.44:1.

[0017] Furthermore, an installation cavity is opened in the sealing ball, and the installation cavity is connected with the dynamic disturbance through-channel. A resistance component is arranged in the installation cavity, and the resistance component includes a support part fixedly connected in the installation cavity and a blocking plate fixedly connected to the support part, so that when the fluid penetrates into the installation cavity, the sealing ball can dynamically block the aeration hole randomly through the blocking of the resistance component.

[0018] Furthermore, an installation cavity is provided in the sealing ball, and the installation cavity is connected with the dynamic disturbance through-channel. A resistance component is provided in the installation cavity, and the resistance component includes a support portion rotatably connected in the installation cavity and a blocking plate fixedly connected to the support portion. A limit block is installed on the support portion, and a limit groove is provided on the installation cavity. The limit block is located in the limit groove, so that when the fluid penetrates into the installation cavity, the sealing ball can randomly and dynamically block the aeration hole through the obstruction of the resistance component.

[0019] Furthermore, it also includes a connecting shell, on which an upper cover is installed, to which an air supply pipe is connected, a plurality of main pipes are circumferentially connected to the connecting shell, a flange is connected to one end of the main pipe, a second connecting pipe is installed on the flange, and the first connecting pipe is connected to the second connecting pipe.

[0020] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0021] 1. The low-carbon and energy-saving sewage treatment device, through the set dynamic disturbance through-channel, will randomly and irregularly be in a relative state with the first connecting pipe. When in a relative state, the gas in the first connecting pipe will directly pass through the blocking ball through the dynamic disturbance through-channel. Compared with the gas directly blowing to the surface of the blocking ball, the thrust of the gas on the blocking ball is greatly weakened in this state, which enables the blocking ball to approach the bottom of the aeration ball shell during the activity and block the aeration holes at the bottom of the aeration ball shell. Therefore, compared with the prior art, the blocking ball can have stronger randomness and dynamically adjust the aeration holes at the bottom of the aeration ball shell. The air flow intensity of the pores is improved, and compared with the prior art, the aeration holes facing the bottom of the pool can also be randomly blocked within a uniform time range, which can avoid the aeration holes facing the bottom of the pool being in an open state for a long time, which causes fatigue of the material at the aeration holes. Therefore, the device opens at least one dynamic disturbance through-channel on the blocking ball, which can disperse the continuous impact of the airflow on the single aeration hole when the blocking ball rolls, reduce material fatigue, effectively extend the service life of the aeration ball shell, reduce the number of times the aeration ball shell is replaced, and reduce the cost of sewage treatment, thereby achieving low-carbon energy saving.

[0022] 2. The low-carbon and energy-saving sewage treatment device has a dynamic disturbance through-channel opened on the sealing ball, which can further buffer the fluctuation of air flow pressure, improve the impact load of the aeration ball shell, and thereby reduce the impact on the aeration ball shell caused by the sudden change of air supply pressure; and the setting of the dynamic disturbance through-channel, when the air outlet end of the first connecting pipe is at an obtuse angle to the dynamic disturbance through-channel, when the gas enters the dynamic disturbance through-channel, the gas flow further impacts the side wall of the dynamic disturbance through-channel, which further increases the random trajectory of the sealing ball rolling and moving in the cavity, and increases the performance of the sealing ball in randomly sealing the aeration holes. Therefore, compared with the prior art, the effect of aeration on the bottom of the pool can be further improved.

[0023] 3. This low-carbon and energy-saving sewage treatment device has a grid-like concave-convex pattern on the surface of the sealing ball. Therefore, when the sealing ball contacts the inner wall of the aeration ball shell, it can clean the inner wall and remove the sludge or impurities attached to the aeration holes by friction, thereby reducing the risk of aeration hole blockage and effectively extending the maintenance cycle. The grid-like concave-convex pattern on the sealing ball and the setting of the dynamic disturbance through-channel can generate local turbulence when the sealing ball moves in the cavity, increase the shear force of the water body, promote the breakup of sludge flocs, release internal moisture, improve dehydration performance, and further improve the sewage aeration effect.

[0024] 4. This low-carbon and energy-saving sewage treatment method, which returns water from the primary anoxic zone to the anaerobic zone for enhanced denitrification and denitrification, will not carry a large amount of dissolved oxygen into the anaerobic zone, will not destroy the anaerobic environment of the anaerobic zone, and will not affect the anaerobic phosphorus release effect; fully utilize the COD in the raw water, and the amount of external carbon source added is small; the amount of return from the primary anoxic zone to the anaerobic zone is small, so the power of the pump is small, which can save power consumption and achieve a low-carbon and environmentally friendly sewage treatment effect; the secondary anoxic zone is a strict anoxic environment. Compared with the traditional two-stage AO (AOAO) process (AO (AOAO) represents anoxic-aerobic), the dissolved oxygen flowing into the secondary anoxic zone is small, and the dissolved oxygen will consume the external carbon source. Therefore, the utilization rate of the external carbon source in this zone is high, which can save the amount of carbon source added, and further achieve a low-carbon and environmentally friendly sewage treatment effect; on the basis of AOA, adding a secondary aerobic zone can enhance nitrification, ensure that the effluent ammonia nitrogen and COD meet the standards, and cooperate with the efficient aeration of this device to achieve low-carbon and efficient sewage treatment.

[0025] Therefore, in this device, the randomness of the sealing balls in the aeration ball shell is further improved, that is, the randomness of the opening positions of the aeration holes is improved, thereby enhancing the disturbance to the pool bottom and improving the aeration effect. Compared with the aeration method of the prior art, it can save aeration energy and achieve low-carbon and energy-saving sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In the attached picture:

[0027] Figure 1 A schematic diagram of the three-dimensional structure of a low-carbon and energy-saving sewage treatment device proposed by the present invention Figure 1 ;

[0028] Figure 2 A schematic diagram of the three-dimensional structure of a low-carbon and energy-saving sewage treatment device proposed by the present invention Figure 2 ;

[0029] Figure 3 A top view of a low-carbon and energy-saving sewage treatment device proposed by the present invention;

[0030] Figure 4 This is a structural schematic diagram of a connecting shaft, a first gear, and a second gear of a low-carbon and energy-saving sewage treatment device proposed by the present invention;

[0031] Figure 5 This is a schematic diagram when the number of the blocking ball proposed by the present invention is one;

[0032] Figure 6 This is a schematic diagram of the case where the number of blocking balls provided by the present invention is two Figure 1 ;

[0033] Figure 7 This is a schematic diagram of the case where the number of blocking balls provided by the present invention is two Figure 2 ;

[0034] Figure 8 This is a schematic diagram of the case where the number of blocking balls provided by the present invention is three Figure 1 ;

[0035] Fig. 9 This is a schematic diagram of the case where the number of blocking balls provided by the present invention is three Figure 2 ;

[0036] Fig.10 A schematic diagram of the structure of a resistance component of a low-carbon and energy-saving sewage treatment device proposed by the present invention Figure 1 ;

[0037] Fig.11 A schematic diagram of the structure of a resistance component of a low-carbon and energy-saving sewage treatment device proposed by the present invention Figure 2 ;

[0038] Fig.12 A schematic diagram of the structure of a resistance component of a low-carbon and energy-saving sewage treatment device proposed by the present invention Figure 3 ;

[0039] Fig.13 A low-carbon and energy-saving sewage treatment device proposed by the present invention Fig.12 The structural diagram at A in the middle;

[0040] Fig.14 This is a schematic diagram of the structure of a blocking ball for a low-carbon and energy-saving sewage treatment device proposed by the present invention;

[0041] Fig.15 This is a structural schematic diagram of a dynamic disturbance through-channel of a low-carbon and energy-saving sewage treatment device proposed by the present invention;

[0042] Fig.16 This is a schematic diagram of the structure of a grid-like concave-convex pattern of a low-carbon and energy-saving sewage treatment device proposed by the present invention;

[0043] Fig.17 This is a schematic diagram of the sewage treatment method proposed in the present invention.

[0044] In the figure: 1. aeration ball shell; 10. aeration hole; 101. cavity; 11. first connecting pipe; 12. second connecting pipe; 121. flange; 13. main pipeline; 131. bracket; 14. connecting shell; 141. upper cover; 142. air supply pipe; 2. blocking ball; 21. dynamic disturbance through-channel; 22. installation cavity; 23. resistance component; 231. support part; 232. blocking plate; 233. limit groove; 234. limit block; 24. protruding column; 25. grid-like concave-convex pattern; 3. sealing cover; 31. motor; 32. bevel gear plate; 33. small bevel gear; 34. connecting shaft; 341. sleeve; 342. first gear; 343. second gear. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0046] Example 1: Reference Figure 1-Figure 17 , a low-carbon and energy-saving sewage treatment method, comprising the following steps:

[0047] S1. Set up water inlet, anaerobic zone, primary aerobic zone, primary anoxic zone (primary anoxic zone can also be used as facultative anoxic zone: the main function of primary anoxic zone (facultative anoxic zone) is that the primary anoxic zone can adjust the oxygen supply relative to the secondary anoxic zone. It is mainly anoxic at ordinary times. When the ammonia nitrogen reaches a certain index, the oxygen supply can be increased (so that the dissolved oxygen content in the pool reaches the aerobic concentration) to enhance the ammonia nitrogen removal rate), secondary anoxic zone, secondary aerobic zone, sedimentation zone, and effluent. The sewage flows through the anaerobic zone, primary aerobic zone, primary anoxic zone (facultative anoxic zone), secondary anoxic zone, secondary aerobic zone, sedimentation zone in sequence through the water inlet, and then effluent to the next unit;

[0048] S2, sludge return: return from the sedimentation tank to the anaerobic zone;

[0049] S3, nitrification liquid reflux: reflux from the primary anoxic zone to the anaerobic zone, the reflux volume is 20% to 50% of the influent volume;

[0050] S4: When the ammonia nitrogen value in the primary anoxic zone (facultative anoxic zone) is higher than 1 / 2 of the outlet water limit, gas is pumped into the aeration ball shell 1 through the gas supply pipe 142, and the gas is discharged through the aeration holes 10 to produce aeration. When the gas enters the aeration ball shell 1, it drives the blocking balls 2 in the cavity 101 to move randomly, and dynamically and randomly blocks the aeration holes 10, thereby increasing the aeration volume and aeration performance in the primary anoxic zone (facultative anoxic zone).

[0051] Using the above methods for sewage treatment, the roles played by each district are as follows:

[0052] (1) Anaerobic zone: converting organic matter into internal carbon source for storage; anaerobic phosphorus release; denitrification;

[0053] (2) Primary aerobic zone: nitrification, converting ammonia nitrogen into nitrate nitrogen; removing most of the organic matter;

[0054] (3) Primary anoxic zone (facultative anoxic zone): Denitrification and denitrification are carried out using the internal carbon source stored in the anaerobic section. When the ammonia nitrogen exceeds a certain value, such as higher than 1 / 2 of the effluent limit, the aeration volume can be increased to strengthen nitrification and increase the ammonia nitrogen removal rate. By adjusting the aeration volume at the front and back ends of this zone, simultaneous nitrification and denitrification can occur.

[0055] (4) Secondary anoxic zone: Enhance denitrification and denitrification; if the influent C / N ratio is lower than 3, or the nitrate nitrogen in this zone is higher than 1 / 3 of the effluent limit, an external carbon source is required to enhance denitrification and denitrification (C / N is expressed as the carbon-nitrogen ratio);

[0056] (5) Secondary aerobic zone: removes residual organic matter and ensures that the ammonia nitrogen content in the effluent meets the standards.

[0057] Among them, the volume ratio of each zone is 1: (1~2): (1~4): (0.2~0.5): (0.2~0.5), and the zones are anaerobic zone, primary aerobic zone, primary anoxic zone (facultative anoxic zone), secondary anoxic zone, and secondary aerobic zone.

[0058] Advantages of this treatment method:

[0059] 1. The water flows back from the primary anoxic zone to the anaerobic zone to enhance denitrification and denitrification, which will not carry a large amount of dissolved oxygen into the anaerobic zone, will not destroy the anaerobic environment of the anaerobic zone, and will not affect the anaerobic phosphorus release effect;

[0060] 2. Make full use of COD in raw water, with less amount of external carbon source added;

[0061] 3. If the amount of reflux from the primary anoxic zone to the anaerobic zone is small, the pump power is small, which can save electricity consumption and achieve a low-carbon and environmentally friendly sewage treatment effect;

[0062] 4. The secondary anoxic zone is a strict anoxic environment. Compared with the traditional two-stage AO (AOAO) process, the dissolved oxygen flowing into the secondary anoxic zone is less, and the dissolved oxygen will consume the external carbon source. Therefore, the utilization rate of the external carbon source in this area is high, which can save the amount of carbon source added and further achieve a low-carbon and environmentally friendly sewage treatment effect;

[0063] On the basis of AOA, adding a secondary aerobic zone can enhance nitrification, ensure that the effluent ammonia nitrogen and COD meet the standards, and cooperate with the efficient aeration of this device to achieve low-carbon and high-efficiency sewage treatment.

[0064] Example 2: Reference Figure 1-Figure 16 A low-carbon and energy-saving sewage treatment device comprises: a cavity 101 is opened in an aeration ball shell 1; aeration holes 10 are evenly opened on the aeration ball shell 1 and are connected to the cavity 101; a first connecting pipe 11 is connected to the aeration ball shell 1 and is used to supply gas to the cavity 101; a blocking ball 2, at least one blocking ball 2 is placed in the cavity 101; a dynamic disturbance penetration channel 21, at least one of which is opened on the blocking ball 2, and the dynamic disturbance penetration channel 21 penetrates the blocking ball 2 to increase the dynamic random activity trajectory of the blocking ball 2 in the cavity 101; a first connecting pipe 11 is connected to the cavity 101 to supply gas to the blocking ball 2; a dynamic disturbance penetration channel 21 is opened on the blocking ball 2, and the dynamic disturbance penetration channel 21 penetrates the blocking ball 2 to increase the dynamic random activity trajectory of the blocking ball 2 in the cavity 101; a first connecting pipe 11 is connected to the cavity 1 01, when the gas in the first connecting pipe 11 blows toward the surface of the blocking ball 2, the blocking ball 2 moves randomly and dynamically in the cavity 101 and randomly blocks the aeration hole 10; when the blocking ball 2 moves randomly and dynamically in the cavity 101, when the air inlet end of the first connecting pipe 11 is opposite to the dynamic disturbance through-channel 21, the airflow of the first connecting pipe 11 directly passes through the blocking ball 2 through the dynamic disturbance through-channel 21, and the thrust of the airflow on the blocking ball 2 is weakened; the grid-like concave-convex pattern 25 is arranged on the surface of the blocking ball 2, so as to clean the inner wall of the blocking ball 2 when the blocking ball 2 moves in the cavity 101;

[0065] When the device is in use, air is supplied to the aeration ball shell 1 through the first connecting pipe 11, and the air is discharged through the aeration holes 10, so that aeration is generated in the sewage treatment pool. Since the aeration ball shell 1 is circular and the aeration holes 10 are evenly distributed on the aeration ball shell 1, the air can be discharged from all directions of the aeration ball shell 1, effectively improving the aeration effect of the sewage.

[0066] At the same time, at least one blocking ball 2 is placed in the cavity 101 of the aeration ball shell 1. The blocking ball 2 moves in the cavity 101 under the push of the gas discharged from the first connecting pipe 11.

[0067] Reference Figure 1 The gas outlet end of the first connecting pipe 11 is arranged upward, and the blocking ball 2 is pushed away from the bottom surface of the aeration ball shell 1 by the gas, so that the aeration holes 10 below the aeration ball shell 1 are fully exposed. Therefore, when the aeration holes 10 facing the sludge at the bottom of the pool discharge gas, they can generate an impact toward the sludge, causing the sludge accumulated at the bottom of the pool to turn over, thereby effectively avoiding the accumulation of sludge;

[0068] Secondly, since the blocking ball 2 moves in the cavity 101, it will dynamically and randomly contact the inner wall of the aeration ball shell 1, and then dynamically and randomly block part of the aeration holes 10, so that the gas is concentrated and discharged from other open aeration holes 10, which increases the pressure of the gas discharged from the other aeration holes 10, and when the blocking ball 2 is away from the bottom surface of the aeration ball shell 1, the pressure of the gas discharged from the aeration holes 10 located at the bottom of the aeration ball shell 1 is further increased, which can enhance the flushing force of the sludge on the bottom of the pool, and further effectively alleviate the problem of sludge accumulation at the bottom of the pool.

[0069] When the blocking ball 2 moves in the cavity 101, the dynamic disturbance through-channel 21 will randomly and irregularly be in a relative state with the first connecting tube 11. When in a relative state, the gas in the first connecting tube 11 will directly pass through the blocking ball 2 through the dynamic disturbance through-channel 21. Compared with the gas directly blowing to the surface of the blocking ball 2, the thrust of the gas on the blocking ball 2 is greatly weakened in this state, which enables the blocking ball 2 to approach the bottom of the aeration ball shell 1 during the activity and block the aeration holes 10 at the bottom of the aeration ball shell 1. Therefore, compared with the prior art, the blocking ball 2 can have stronger randomness and dynamically adjust the aeration holes 10, and compared with the prior art, the aeration holes 10 facing the pool bottom can also be randomly blocked within a uniform time range, which can avoid the aeration holes 10 facing the pool bottom being in an open state for a long time, which causes fatigue of the material at the aeration holes 10. Therefore, the device opens at least one dynamic disturbance through-channel 21 on the blocking ball 2, which can disperse the continuous impact of the airflow on the single aeration hole 10 when the blocking ball 2 rolls, reduce material fatigue, effectively extend the service life of the aeration ball shell 1, reduce the number of times the aeration ball shell 1 is replaced, and reduce the cost of sewage treatment, thereby achieving low-carbon energy saving.

[0070] Secondly, the dynamic disturbance through-channel 21 opened on the blocking ball 2 can further buffer the air flow pressure fluctuation, improve the impact load resistance of the aeration ball shell 1, and further reduce the impact on the aeration ball shell 1 caused by the sudden change of the air supply pressure.

[0071] Moreover, due to the setting of the dynamic disturbance through-channel 21, when the air outlet end of the first connecting pipe 11 forms an obtuse angle with the dynamic disturbance through-channel 21, when the gas enters the dynamic disturbance through-channel 21, the gas flow further impacts the side wall of the dynamic disturbance through-channel 21, which further increases the random trajectory of the rolling and moving of the blocking ball 2 in the cavity 101, thereby increasing the performance of the blocking ball 2 in randomly blocking the aeration hole 10. Therefore, compared with the prior art, the effect of aeration on the pool bottom can be further improved.

[0072] It should be understood that the blocking ball 2 has a certain weight, so it will not float in the water due to the opening of the dynamic disturbance penetrating channel 21; the blocking ball 2 can be made of metal, ceramic and other materials that have a certain weight.

[0073] The surface of the blocking ball 2 is provided with a grid-like concave-convex pattern 25, so when the blocking ball 2 contacts the inner wall of the aeration ball shell 1, the inner wall can be cleaned, and the sludge or impurities attached to the aeration hole 10 can be removed by friction, thereby reducing the risk of clogging the aeration hole 10 and effectively extending the maintenance cycle;

[0074] Moreover, the mesh-like concave-convex纹路25 on the plugging ball 2 and the setting of the dynamic disturbance through-channel 21 can generate local turbulence when the plugging ball 2 moves in the cavity 101, increasing the shear force of the water body, promoting the fragmentation of sludge flocs, releasing internal moisture, improving the dewatering performance, and further enhancing the sewage aeration effect.

[0075] Furthermore, a wear-resistant coating is provided on the surface of the plugging ball 2 to improve the wear resistance of the plugging ball 2 when it rolls in the cavity 101.

[0076] In one embodiment, when the number of the dynamic disturbance through-channels 21 is greater than 1, the relative number of times of the dynamic disturbance through-channels 21 and the gas in the first connecting pipe 11 can be further increased, the random rolling trajectory of the plugging ball 2 in the cavity 101 can be further improved, and the aeration effect on the bottom of the pool can be further enhanced.

[0077] In one embodiment, the opening position of the dynamic disturbance through-channel 21 in the same cross-section can be in a "chuan" character shape on the plugging ball 2, which enables more airflows to pass through the dynamic disturbance through-channel 21 when the first connecting pipe 11 and the dynamic disturbance through-channel 21 are in a relative state.

[0078] In one embodiment, the cross-sectional shape of the dynamic disturbance through-channel 21 can be an s shape, a wavy shape, a w shape, or a V shape. When the airflow enters the dynamic disturbance through-channel 21, the fluid bends and flows in the dynamic disturbance through-channel 21, colliding with the inner wall of the dynamic disturbance through-channel 21, further improving the randomness of the rolling of the plugging ball 2 and, compared with the prior art, further increasing the aeration effect.

[0079] Example 3: Refer to Figure 5 , a low-carbon and energy-saving sewage treatment device, which is basically the same as that in Example 2. Further, when there is one plugging ball 2 in the cavity 101, the proportional relationship between the outer diameter size of the plugging ball 2 and the inner diameter size of the aeration ball shell 1 is 0.65 - 0.75:1;

[0080] Under this proportional relationship, the diameter size of the plugging ball 2 is larger than the inner diameter size of the aeration ball shell 1, enabling the plugging ball 2 to block more aeration holes 10 when it rolls.

[0081] In one embodiment, protruding columns 24 are provided on the surface of the plugging ball 2. When the plugging ball 2 rolls, when the protruding columns 24 contact the inner wall of the aeration ball shell 1, the plugging ball 2 will be pushed away from the inner wall, further improving the randomness of the movement trajectory of the plugging ball 2.

[0082] Example 4: Refer to Figure 6, a low-carbon and energy-saving sewage treatment device, which is basically the same as Example 2, and further: when there are two blocking balls 2 in the cavity 101, the ratio between the outer diameter of the blocking ball 2 and the inner diameter of the aeration ball shell 1 is 0.3-0.38:1;

[0083] Under this proportional relationship, the two blocking balls 2 have more space for movement in the cavity 101 , so that the rolling trajectory of the blocking balls 2 is more random, while improving the cleaning effect on the inner wall of the aeration ball shell 1 .

[0084] In one embodiment, a protruding column 24 is provided on the surface of the blocking ball 2. When the blocking ball 2 rolls, the protruding column 24 will push the blocking ball 2 away from the inner wall when it contacts the inner wall of the aeration ball shell 1, thereby further improving the randomness of the movement trajectory of the blocking ball 2. When two blocking balls 2 contact, they will also produce an effect of pushing each other away.

[0085] Example 5: Reference Figure 7 , a low-carbon and energy-saving sewage treatment device, which is basically the same as Example 2, and further: when there are two blocking balls 2 in the cavity 101, the ratio between the outer diameter of the blocking ball 2 and the inner diameter of the aeration ball shell 1 is 0.48:1;

[0086] Under this proportional relationship, the sum of the diameters of the two blocking balls 2 is slightly smaller than the inner diameter of the aeration ball shell 1, so that the blocking balls 2 rotate in the cavity 101 under the drive of the gas, and are more likely to contact the inner wall of the aeration ball shell 1, thereby increasing the number of blocking times of the aeration holes 10, further improving the aeration effect, and at the same time improving the cleaning effect of the inner wall of the aeration ball shell 1;

[0087] At the same time, since the surface of the blocking ball 2 is provided with a grid-like concave-convex pattern 25, when two blocking balls 2 are in contact, the grid-like concave-convex pattern 25 also has a meshing effect, so that when one of the blocking balls 2 is subjected to force, it can drive the other blocking ball 2 to rotate or roll, further increasing the randomness of the dynamic aeration holes 10.

[0088] Example 6: Reference Figure 8 , a low-carbon and energy-saving sewage treatment device, which is basically the same as Example 2, and further: when there are three blocking balls 2 in the cavity 101, the ratio between the outer diameter of the blocking ball 2 and the inner diameter of the aeration ball shell 1 is 0.3-0.38:1;

[0089] Under this proportional relationship, the three sealing balls 2 have a larger spatial range for movement in the cavity 101, and because three sealing balls 2 are provided, the number of times the aeration holes 10 are blocked can be further increased, and the blocking position of the aeration holes 10 can be continuously changed to improve the aeration effect; and the setting of the three sealing balls 2 and the setting of the dynamic disturbance through-channel 21 can increase the randomness of the rolling trajectory of the sealing balls 2, and at the same time improve the cleaning effect of the inner wall of the aeration ball shell 1.

[0090] In one embodiment, a protruding column 24 is provided on the surface of the blocking ball 2. When the blocking ball 2 rolls, the protruding column 24 will push the blocking ball 2 away from the inner wall when it contacts the inner wall of the aeration ball shell 1, thereby further improving the randomness of the movement trajectory of the blocking ball 2. When the blocking balls 2 contact each other, they will also produce an effect of pushing each other away.

[0091] Example 7: Reference Fig. 9 , a low-carbon and energy-saving sewage treatment device, which is basically the same as Example 2, and further: when there are three blocking balls 2 in the cavity 101, the ratio between the outer diameter of the blocking ball 2 and the inner diameter of the aeration ball shell 1 is 0.44:1;

[0092] Under this proportional relationship, the trajectories of the three blocking balls 2 change randomly in a regular state, further dynamically blocking the aeration holes 10 located at different positions, further improving the aeration effect on the pool bottom;

[0093] At the same time, since the surface of the blocking ball 2 is provided with a grid-like concave-convex pattern 25, when the three blocking balls 2 are in contact, the grid-like concave-convex pattern 25 also has a meshing effect, so that when one of the blocking balls 2 is subjected to force, it can drive the other two blocking balls 2 to rotate or roll, further increasing the randomness of the dynamic aeration holes 10.

[0094] In the present device, increasing the randomness of the blocking balls 2 in the aeration ball shell 1 increases the randomness of the opening positions of the aeration holes 10, thereby increasing the disturbance to the pool bottom and improving the aeration effect.

[0095] Example 8: Reference Fig.10 , Fig.11 , a low-carbon and energy-saving sewage treatment device, which is basically the same as embodiments 3, 4, 5, 6, and 7, and further: a mounting cavity 22 is opened in the blocking ball 2, the mounting cavity 22 is connected to the dynamic disturbance through-channel 21, and a resistance component 23 is arranged in the mounting cavity 22, and the resistance component 23 includes a support portion 231 fixedly connected in the mounting cavity 22 and a blocking plate 232 fixedly connected to the support portion 231, so that when the fluid penetrates the mounting cavity 22, the blocking ball 2 is blocked by the resistance component 23, so that the aeration hole 10 is randomly and dynamically blocked;

[0096] The setting of the resistance component 23 can create resistance to the fluid when the fluid passes through the dynamic disturbance penetration channel 21, thereby changing the force position of the blocking ball 2, so that the blocking ball 2 moves more randomly in the cavity 101;

[0097] In one embodiment, referring to Fig.10 The blocking plate 232 on the resistance component 23 is 45 degrees to the dynamic disturbance through-channel 21 , so that the maximum force range of the dynamic disturbance through-channel 21 is formed between the two blocking plates 232 .

[0098] In one embodiment, the blocking plate 232 on the resistance component 23 is horizontal to the dynamic disturbance through-channel 21 , and combined with the shape of the mounting cavity 22 , the fluid entering the dynamic disturbance through-channel 21 is guided, further increasing the randomness of the movement of the blocking ball 2 .

[0099] Example 9: Reference Fig.12 , Fig.13 , a low-carbon and energy-saving sewage treatment device, which is basically the same as embodiments 3, 4, 5, 6, and 7, and further: a mounting cavity 22 is provided in the blocking ball 2, the mounting cavity 22 is connected to the dynamic disturbance through-channel 21, a resistance component 23 is provided in the mounting cavity 22, the resistance component 23 includes a support portion 231 rotatably connected to the mounting cavity 22 and a blocking plate 232 fixedly connected to the support portion 231, a limiting block 234 is installed on the support portion 231, a limiting groove 233 is provided on the mounting cavity 22, and the limiting block 234 is located in the limiting groove 233, so that when the fluid penetrates the mounting cavity 22, the blocking of the resistance component 23 enables the blocking ball 2 to randomly and dynamically block the aeration hole 10;

[0100] When the fluid enters the installation cavity 22 through the dynamic disturbance through channel 21, the fluid impacts the rotating resistance component 23, causing the blocking plate 232 to change the angle between it and the dynamic disturbance through channel 21, thereby changing the flow rate of the fluid diversion, thereby improving the randomness of the movement of the blocking ball 2.

[0101] Example 10: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , a low-carbon and energy-saving sewage treatment device, which is basically the same as embodiments 2, 3, 4, 5, 6, 7, 8, and 9, and further includes: a connecting shell 14, an upper cover 141 is installed on the connecting shell 14, an air supply pipe 142 is connected to the upper cover 141, a plurality of main pipes 13 are circumferentially connected to the connecting shell 14, a flange 121 is connected to one end of the main pipe 13, a second connecting pipe 12 is installed on the flange 121, and the first connecting pipe 11 is connected to the second connecting pipe 12;

[0102] The aeration ball shell 1 is installed by the above-mentioned structural components, and can be conveniently fixed on the bottom of the pool for use by means of a bracket 131 installed on the main pipe 13; the gas in the air supply pipe 142 enters the connecting shell 14, and then enters the main pipe 13, and can conveniently enter the aeration ball shell 1.

[0103] The air supply pipe 142 can be a soft pipe or a hard pipe.

[0104] In one embodiment, a sealing cover 3 is installed at the bottom of the aeration ball shell 1, and a motor 31 is installed in the sealing cover 3. The motor 31 adopts a submersible motor, a brushless DC motor or a permanent magnet synchronous motor, so that the motor 31 can work underwater. A bevel gear disk 32 is installed on the output end of the motor 31, and a sleeve 341 is installed on the sealing cover 3. A connecting shaft 34 is rotatably connected in the sleeve 341. A small bevel gear 33 is installed on the end of the connecting shaft 34 close to the bevel gear disk 32. The small bevel gear 33 is meshed with the bevel gear disk 32. A first gear 342 is installed on the end of the connecting shaft 34 away from the bevel gear disk 32. The second connecting pipe 12 is rotatably connected to the flange 121, and a second gear 343 is installed on the second connecting pipe 12. The first gear 342 and the second gear 343 are meshed. The first connecting pipe 11 is vertical to the main pipeline 13, and the motor 31 is used to drive the aeration ball shell 1 upward or downward;

[0105] By starting the motor 31, the motor 31 drives the connecting shaft 34 to rotate, driving the second connecting pipe 12 to rotate, and then driving the aeration ball shell 1 to change direction. After the aeration ball shell 1 changes direction, the blocking ball 2 will change its position with the first connecting pipe 11 under its own gravity, thereby changing the aeration condition of the pool bottom;

[0106] When the aeration ball shell 1 faces the bottom of the pool, the sealing balls 2 are closer to the aeration holes 10 facing the bottom of the pool, so that the aeration holes 10 at other positions are opened, thereby increasing the disturbance effect on the sewage at the lateral position of the sewage pool.

[0107] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the present invention can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A sewage treatment method, characterized in that: The following steps are involved: An inlet, an anaerobic zone, a primary aerobic zone, a primary anoxic zone, a secondary anoxic zone, a secondary aerobic zone, a sedimentation zone, and an outlet are arranged, and the sewage flows through the anaerobic zone, the primary aerobic zone, the primary anoxic zone, the secondary anoxic zone, the secondary aerobic zone, the sedimentation zone in sequence, and then the outlet is sent to the next unit; Sludge return: return from the sedimentation tank to the anaerobic zone; Nitrification liquid reflux: reflux from the primary anoxic zone to the anaerobic zone, the reflux volume is 20% to 50% of the influent volume; The volume ratio of anaerobic zone, primary aerobic zone, primary anoxic zone, secondary anoxic zone, and secondary aerobic zone is 1: (1~2): (1~4): (0.2~0.5): (0.2~0.5); When the ammonia nitrogen value in the primary anoxic zone is higher than 1 / 2 of the outlet water limit, gas is pumped into the aeration ball shell (1) through the gas supply pipe (142), and the gas is discharged through the aeration holes (10) to generate aeration. When the gas enters the aeration ball shell (1), it drives the blocking balls (2) in the cavity (101) to move randomly, thereby dynamically and randomly blocking the aeration holes (10); The cavity (101) is opened in the aeration ball shell (1); At least one blocking ball (2) is placed in the cavity (101); At least one of the dynamic disturbance penetration channels (21) is opened on the blocking ball (2), and the dynamic disturbance penetration channel (21) penetrates the blocking ball (2) to increase the dynamic random activity trajectory of the blocking ball (2) in the cavity (101); A first connecting pipe (11) is connected to the aeration ball shell (1) and is used to supply gas into the cavity (101); When the blocking ball (2) moves dynamically and randomly in the cavity (101), when the air inlet end of the first connecting tube (11) is opposite to the dynamic disturbance through-channel (21), the airflow of the first connecting tube (11) directly passes through the blocking ball (2) through the dynamic disturbance through-channel (21), and the thrust of the airflow on the blocking ball (2) is weakened; A grid-like concave-convex pattern (25) is arranged on the surface of the blocking ball (2) and is used to clean the inner wall of the blocking ball (2) when the blocking ball (2) moves in the cavity (101).

2. A low-carbon and energy-saving sewage treatment device, characterized in that: A sewage treatment method according to claim 1, comprising: The aeration holes (10) are evenly arranged on the aeration ball shell (1) and are connected to the cavity (101); When the first connecting pipe (11) supplies gas to the cavity (101), when the gas in the first connecting pipe (11) blows toward the surface of the blocking ball (2), the blocking ball (2) dynamically and randomly moves in the cavity (101) and randomly blocks the aeration hole (10).

3. A low-carbon and energy-saving sewage treatment device according to claim 2, characterized in that: When there is one blocking ball (2) in the cavity (101), the ratio between the outer diameter of the blocking ball (2) and the inner diameter of the aeration ball shell (1) is 0.65-0.75:

1.

4. A low-carbon and energy-saving sewage treatment device according to claim 2, characterized in that: When there are two blocking balls (2) in the cavity (101), the ratio between the outer diameter of the blocking balls (2) and the inner diameter of the aeration ball shell (1) is 0.3-0.38:

1.

5. A low-carbon and energy-saving sewage treatment device according to claim 2, characterized in that: When there are two blocking balls (2) in the cavity (101), the ratio between the outer diameter of the blocking balls (2) and the inner diameter of the aeration ball shell (1) is 0.48:

1.

6. A low-carbon and energy-saving sewage treatment device according to claim 2, characterized in that: When there are three blocking balls (2) in the cavity (101), the ratio between the outer diameter of the blocking balls (2) and the inner diameter of the aeration ball shell (1) is 0.3-0.38:

1.

7. A low-carbon and energy-saving sewage treatment device according to claim 2, characterized in that: When there are three blocking balls (2) in the cavity (101), the ratio between the outer diameter of the blocking balls (2) and the inner diameter of the aeration ball shell (1) is 0.44:

1.

8. A low-carbon and energy-saving sewage treatment device according to claim 3, 4, 5, 6 or 7, characterized in that: The blocking ball (2) is provided with an installation cavity (22), the installation cavity (22) being in communication with the dynamic disturbance through-channel (21), and a resistance component (23) being provided in the installation cavity (22), the resistance component (23) comprising a support portion (231) fixedly connected in the installation cavity (22) and a blocking plate (232) fixedly connected to the support portion (231), so that when a fluid penetrates into the installation cavity (22), the blocking of the resistance component (23) causes the blocking ball (2) to dynamically and randomly block the aeration hole (10).

9. A low-carbon and energy-saving sewage treatment device according to claim 3, 4, 5, 6 or 7, characterized in that: The blocking ball (2) is provided with an installation cavity (22), the installation cavity (22) being in communication with the dynamic disturbance through-channel (21), the installation cavity (22) being provided with a resistance component (23), the resistance component (23) comprising a support portion (231) rotatably connected to the installation cavity (22) and a blocking plate (232) fixedly connected to the support portion (231), a limiting block (234) being installed on the support portion (231), a limiting groove (233) being provided on the installation cavity (22), the limiting block (234) being located in the limiting groove (233), so that when a fluid penetrates the installation cavity (22), the blocking of the resistance component (23) enables the blocking ball (2) to dynamically and randomly block the aeration hole (10).

10. A low-carbon and energy-saving sewage treatment device according to claim 3, 4, 5, 6 or 7, characterized in that: It also comprises a connecting shell (14), an upper cover (141) being mounted on the connecting shell (14), the air supply pipe (142) being connected to the upper cover (141), a plurality of main pipes (13) being circumferentially connected to the connecting shell (14), one end of the main pipe (13) being connected to a flange (121), a second connecting pipe (12) being mounted on the flange (121), and the first connecting pipe (11) being connected to the second connecting pipe (12).

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