Flocculation clarification sewage treatment equipment

Abstract

The utility model relates to the technical field of sewage treatment, and provides flocculation clarification sewage treatment equipment which comprises a tank body, the tank body is provided with a precipitation cavity, a liquid inlet outer pipe penetrates through the tank body from the bottom, a liquid inlet inner pipe is arranged in the liquid inlet outer pipe, a flocculation medicine inlet channel is formed between the liquid inlet inner pipe and the liquid inlet outer pipe, and the liquid inlet inner pipe is provided with a sewage inlet channel. The flocculation medicine inlet channel and the sewage inlet channel are communicated to the precipitation cavity, the cover body is arranged in the precipitation cavity and located above the flocculation medicine inlet channel and the sewage inlet channel, and a plurality of through holes are formed in the cover body. By means of the technical scheme, the problems that in the prior art, a flocculation agent and sewage of a flocculation and sedimentation tank are not evenly mixed, and equipment is inconvenient to maintain are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and specifically to a flocculation and clarification sewage treatment device. Background Art

[0002] Sewage treatment is the process of purifying sewage to meet the water quality requirements for discharge into a water body or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, and catering, and is increasingly entering the daily lives of ordinary people. In the sewage treatment system, flocculation tanks and sedimentation tanks are devices for separating mud and water, and are essential basic treatment units in the sewage treatment process. However, the existing design of flocculation and clarification sewage treatment equipment does not mix the flocculation agent with the sewage evenly, and the equipment is not easy to maintain. Utility Model Content

[0003] The utility model provides a flocculation and clarification sewage treatment device, which solves the problems in the related art that flocculation reagents and sewage are not evenly mixed in a flocculation sedimentation tank and the equipment is inconvenient to maintain.

[0004] The technical solution of the utility model is as follows:

[0005] A flocculation and clarification sewage treatment device, comprising

[0006] A tank body, wherein the tank body has a sedimentation chamber,

[0007] an outer liquid inlet pipe, the outer liquid inlet pipe penetrates the tank body from the bottom,

[0008] The inner liquid inlet tube is arranged inside the outer liquid inlet tube, and a flocculant inlet channel is formed between the inner liquid inlet tube and the outer liquid inlet tube. The inner liquid inlet tube has a sewage inlet channel, and both the flocculant inlet channel and the sewage inlet channel lead to the sedimentation chamber.

[0009] The cover body is arranged in the sedimentation chamber and is located above the flocculant inlet channel and the sewage inlet channel. The cover body has a plurality of through holes.

[0010] As a further technical solution, it also includes

[0011] a first annular baffle, which is arranged outside the liquid inlet outer tube and has a distance from the bottom of the precipitation chamber,

[0012] a second annular baffle, the second annular baffle being arranged between the first annular baffle and the side wall of the sedimentation chamber, the second annular baffle dividing the sedimentation chamber into a first cavity and a second cavity, and the first annular baffle dividing the first cavity into a flocculation zone and a sedimentation zone,

[0013] The tank body has an outlet, and the upper end of the second annular baffle is higher than the outlet.

[0014] As a further technical solution, it also includes a scraper, which is rotatably arranged in the flocculation area, and the scraper is sleeved on the liquid inlet outer tube and abuts against the first annular baffle.

[0015] As a further technical solution, the bottom of the first cavity is conical, and the bottom of the first cavity has a first sewage outlet.

[0016] As a further technical solution, it also includes

[0017] A material receiving member, wherein the material receiving member is arranged at the bottom of the scraping member, and the material receiving member has a plurality of circumferentially arranged material collecting grooves, the groove walls of the material collecting grooves have mesh through holes, and the material collecting grooves have a material collecting opening, the opening direction of the material collecting opening is along the radial direction of the tank body, and leads to the first sewage outlet.

[0018] As a further technical solution, it also includes

[0019] The third annular baffle is arranged in the second cavity, the third annular baffle is spaced from the bottom of the second cavity, a low-speed sedimentation area is between the third annular baffle and the second annular baffle, and an overflow area is between the third annular baffle and the inner wall of the sedimentation cavity.

[0020] As a further technical solution, the third annular baffle has a first mounting groove and a second mounting groove, the first mounting groove faces the low-speed sedimentation area and the second mounting groove faces the overflow area, and further includes

[0021] An expansion seal, wherein two expansion seals are respectively arranged in the first installation groove and the second installation groove, and after the expansion seal is expanded, the low-speed sedimentation area is separated from the top and the bottom, and the overflow area is separated from the top and the bottom,

[0022] The bottom of the second cavity is provided with a second sewage outlet.

[0023] As a further technical solution, the tank body has an observation port, which is located on the side wall of the tank body and below the outlet.

[0024] As a further technical solution, the cover body is hemispherical.

[0025] The working principle and beneficial effects of the utility model are:

[0026] The utility model designs a tank body, which serves as the main structure of the equipment, and is provided with a sedimentation chamber inside, which is used to carry and treat sewage, and to precipitate impurities in the sewage through physical and chemical reactions; an outer liquid inlet pipe: the pipe penetrates from the bottom of the tank body, and its main function is to introduce the sewage to be treated from the bottom into the sedimentation chamber; an inner liquid inlet pipe: it is arranged inside the outer liquid inlet pipe, and an independent flocculant inlet channel is formed between the inner liquid inlet pipe and the outer liquid inlet pipe. The inner liquid inlet pipe itself also has a sewage inlet channel leading to the sedimentation chamber. In this way, the flocculant can enter the sedimentation chamber alone through the flocculant inlet channel, and fully mix and react with the sewage entering from the sewage inlet channel in the sedimentation chamber to form flocculation precipitation. Cover body: It is arranged inside the sedimentation chamber and is located above the flocculant inlet channel and the sewage inlet channel. A number of through holes are designed on the cover body. The function of these through holes is to allow sewage and flocculants to pass through the sewage channel and the flocculant inlet channel to the sedimentation chamber, and to be dispersed and mixed on the cover body, thereby improving the flocculation reaction efficiency and the sedimentation effect. Through this structural design, the flocculation and clarification sewage treatment equipment can achieve effective mixing, full reaction and efficient precipitation of flocculants and sewage, thereby achieving preliminary purification of sewage and premixing. When the mixture of sewage and flocculants falls from the cover body to the bottom of the sedimentation chamber, the flocculants and sewage can be further mixed. Compared with the flocculation sewage treatment equipment in the prior art, the use of stirring parts is reduced. The hybrid power source is a pump body for inputting liquid and flocculants into the sedimentation chamber. The internal structure is relatively small and easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0028] Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] In the figure: tank body 1, sedimentation chamber 101, liquid inlet outer tube 2, liquid inlet inner tube 3, flocculation drug inlet channel 201, sewage inlet channel 301, cover body 4, through hole 401, first annular baffle 5, spacing 501, second annular baffle 6, first cavity 102, second cavity 103, flocculation area 104, sedimentation area 105, outlet 106, scraper 7, first sewage outlet 107, material collecting part 8, collecting trough 9, third annular baffle 10, low-speed sedimentation area 108, overflow area 109, second sewage outlet 110, first mounting groove 1001, second mounting groove 1002, expansion seal 11. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0031] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0032] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] Reference Figure 1 , is an embodiment of the utility model, and proposes a flocculation and clarification sewage treatment equipment, including a tank body 1, the tank body 1 has a sedimentation chamber 101, the liquid inlet outer tube 2 penetrates the tank body 1 from the bottom, the liquid inlet inner tube 3 is arranged in the liquid inlet outer tube 2, and a flocculation drug inlet channel 201 is formed between the liquid inlet outer tube 2, the liquid inlet inner tube 3 has a sewage inlet channel 301, and the flocculation drug inlet channel 201 and the sewage inlet channel 301 both lead to the sedimentation chamber 101, the cover body 4 is arranged in the sedimentation chamber 101, and is located above the flocculation drug inlet channel 201 and the sewage inlet channel 301, and the cover body 4 has a plurality of through holes 401.

[0035] In this embodiment, a tank body 1 is designed. The tank body 1 is the main structure of the equipment. A sedimentation chamber 101 is arranged inside the tank body 1 to carry and treat sewage, and to precipitate impurities in the sewage through physical and chemical reactions; a liquid inlet outer pipe 2: the pipe penetrates from the bottom of the tank body 1, and its main function is to introduce the sewage to be treated from the bottom into the sedimentation chamber 101; a liquid inlet inner pipe 3: arranged inside the liquid inlet outer pipe 2, and an independent flocculant inlet channel 201 is formed between the liquid inlet outer pipe 2. The liquid inlet inner pipe 3 itself also has a sewage inlet channel 301 leading to the sedimentation chamber 101. In this way, the flocculant can enter the sedimentation chamber 101 alone through the flocculant inlet channel 201, and fully mix and react with the sewage entering from the sewage inlet channel 301 in the sedimentation chamber 101 to form flocculation precipitation. The cover body 4 is arranged inside the sedimentation chamber 101 and is located above the flocculant inlet channel 201 and the sewage inlet channel 301. A plurality of through holes 401 are designed on the cover body 4. The function of these through holes 401 is to allow the sewage and the flocculant to pass through the sewage channel and the flocculant inlet channel 201 and the sedimentation chamber 101, and to be dispersed and mixed on the cover body 4, so as to improve the flocculation reaction efficiency and the sedimentation effect. Through this structural design, the flocculation and clarification sewage treatment equipment can realize the effective mixing, full reaction and efficient precipitation of the flocculant and the sewage, so as to realize the preliminary purification treatment of the sewage and realize pre-mixing. When the mixture of the sewage and the flocculant falls from the cover body 4 to the bottom of the sedimentation chamber 101, the flocculant and the sewage can be further mixed. Compared with the flocculation sewage treatment equipment in the prior art, the use of agitators is reduced. The hybrid power source is a pump body for inputting liquid and flocculant into the sedimentation chamber 101. The internal structure is less and maintenance is convenient.

[0036] Furthermore, it also includes a first annular baffle 5, which is arranged on the outside of the liquid inlet outer tube 2 and has a distance 501 between it and the bottom of the sedimentation chamber 101, and a second annular baffle 6 is arranged between the first annular baffle 5 and the side wall of the sedimentation chamber 101. The second annular baffle 6 divides the sedimentation chamber 101 into a first cavity 102 and a second cavity 103. The first annular baffle 5 divides the first cavity 102 into a flocculation zone 104 and a sedimentation zone 105. The tank body 1 has an outlet 106, and the upper end of the second annular baffle 6 is higher than the outlet 106.

[0037] In this embodiment, a first annular baffle 5 is designed, which is arranged on the outside of the liquid inlet outer tube 2 and has a certain distance 501 between it and the bottom of the sedimentation chamber 101. The function of the first annular baffle 5 is to preliminarily divide the sewage entering the sedimentation chamber 101 from the liquid inlet outer tube 2 in the vertical direction, and divide the internal area of ​​the first annular baffle 5 into a flocculation area 104. After entering the sedimentation chamber 101, the sewage first fully mixes with the flocculant in this area to react and form flocs; the second annular baffle 6 is arranged between the first annular baffle 5 and the side wall of the sedimentation chamber 101, and divides the entire sedimentation chamber 101 into two independent spaces-a first cavity 102 and a second cavity 103. The first cavity 102 is further divided into two parts, the inner and outer parts, by the first annular baffle 5. The inner part is the flocculation area 104, and the outer part is the sedimentation area 105. After the sewage is flocculated and precipitated in the flocculation area 104, it enters the sedimentation area 105 from the bottom spacing 501. The function of the second annular baffle 6 is to prevent the flocs after precipitation from entering the second cavity 103, ensuring that the flocs have enough residence time for precipitation. Outlet 106: The tank body 1 is provided with a sewage outlet 106. The upper end height of the second annular baffle 6 is higher than the outlet 106, ensuring that only the clear liquid overflowing from the sedimentation cavity 101 into the second cavity 103 after precipitation can be discharged from the outlet 106, while most of the flocs remain in the sedimentation area 105 due to gravity, thereby effectively realizing the flocculation and clarification treatment of sewage.

[0038] Furthermore, it also includes a scraper 7 , which is rotatably disposed in the flocculation area 104 , and is sleeved on the liquid inlet outer tube 2 and abuts against the first annular baffle 5 .

[0039] In this embodiment, a rotatable scraper 7 is designed in the flocculation zone 104. The scraper 7 is cleverly sleeved on the liquid inlet outer tube 2, and its design ensures that it can maintain contact with the first annular baffle 5 during the rotation process. The main function of the scraper 7 is to continuously scrape away the flocs that have been formed in the flocculation zone 104 or the solid particles deposited near the liquid inlet outer tube 2 and the first annular baffle 5 as it rotates, to prevent the flocs from aggregating too much and affecting the full mixing of sewage and flocculants, and to prevent the flocs from clogging the liquid inlet outer tube 2 or the surrounding area of ​​the first annular baffle 5, to ensure the continuity and effectiveness of the flocculation and clarification process. In this way, the equipment can automatically clean the sediment in the flocculation zone 104 while performing flocculation and clarification treatment, thereby improving the self-cleaning ability of the entire equipment and the sewage treatment efficiency.

[0040] Furthermore, the bottom of the first cavity 102 is conical, and a first sewage outlet 107 is provided at the bottom of the first cavity 102 .

[0041] In this embodiment, a conical structure design is adopted at the bottom of the first cavity 102 of the device, which makes it easier for the settled flocs and sediments to gather toward the center, which is convenient for subsequent sewage treatment. The conical bottom design has a gradually decreasing cross-sectional area, which can effectively increase the sedimentation speed and sedimentation amount of the flocs per unit volume, and improve the sedimentation efficiency. In addition, a first sewage outlet 107 is provided in the first cavity 102 of the conical bottom, and the sewage outlet is located at the lowest point or close to the lowest point of the conical bottom, ensuring that the settled flocs and sediments can be discharged through the first sewage outlet 107 to the greatest extent, avoiding the long-term accumulation of sediments inside the device, ensuring the long-term and efficient operation of the device, and also facilitating regular cleaning and maintenance. Through such a design, the equipment can better achieve solid-liquid separation in the flocculation and clarification process, and improve the overall effect of sewage treatment.

[0042] Furthermore, it also includes a material receiving member 8, which is arranged at the bottom of the scraper member 7. The material receiving member 8 has a plurality of circumferentially arranged collection grooves 9, the groove walls of the collection grooves 9 have mesh through holes, and the collection grooves 9 have collection ports. The opening direction of the collection ports is along the radial direction of the tank body 1 and leads to the first sewage outlet 107.

[0043] In this embodiment, a collecting member 8 is installed at the bottom of the scraper 7, and the collecting member 8 is designed with a plurality of collecting troughs 9 evenly arranged along the circumferential direction of the scraper 7. The trough walls of these collecting troughs 9 adopt a mesh through-hole structure, so that when the scraper 7 rotates, the flocs and sediments scraped from the flocculation area 104 can be effectively intercepted and temporarily stored. A collecting port is provided at the bottom of the collecting trough 9, and its opening direction is designed along the radial direction of the tank body 1, directly leading to the first sewage outlet 107 at the bottom of the first cavity 102. During the rotation of the scraper 7, the flocs and sediments in the collecting trough 9 will move along the slot toward the first sewage outlet 107, and finally be discharged to the first sewage outlet 107 through the collecting port, thereby realizing the efficient collection and cleaning of the sediments generated after flocculation and clarification, and ensuring the cleaning inside the equipment and the sewage treatment efficiency. Through such a design, the secondary suspension of the sediment inside the equipment is effectively avoided, and the efficiency of the entire flocculation and clarification process is improved.

[0044] Furthermore, it also includes a third annular baffle 10, which is arranged in the second cavity 103, and there is a distance 501 between the third annular baffle 10 and the bottom of the second cavity 103. There is a low-speed sedimentation area 108 between the third annular baffle 10 and the second annular baffle 6, and there is an overflow area 109 between the third annular baffle 10 and the inner wall of the sedimentation cavity 101.

[0045] In this embodiment, a third annular baffle 10 is added in the second cavity 103, and the baffle maintains a certain distance 501 from the bottom of the second cavity 103. Through this design, the second cavity 103 is further divided into two areas: the area between the third annular baffle 10 and the second annular baffle 6 is a low-speed sedimentation area 108, where the water flow rate is slow, which helps the tiny flocs and incompletely precipitated particles to further precipitate and clarify in this area. The area between the third annular baffle 10 and the inner wall of the sedimentation chamber 101 is defined as an overflow area 109. After flocculation and clarification treatment, the relatively clear upper water body will overflow from this overflow area 109 and flow to the outlet 106 of the equipment, thereby achieving preliminary purification and separation of water quality. The purpose of this structural design is to improve the efficiency and quality of sewage treatment by controlling the water flow rate and floc sedimentation environment in a hierarchical and differentiated manner, and to ensure that the treated effluent can meet the expected clarification standards. At the same time, by reasonably setting the overflow area 109, it is possible to effectively prevent the settled flocs from being re-mixed into the supernatant, thereby improving the stability of the effluent water quality.

[0046] Furthermore, the third annular baffle 10 has a first mounting groove 1001 and a second mounting groove 1002, the first mounting groove 1001 faces the low-speed sedimentation zone 108 and the second mounting groove 1002 faces the overflow zone 109, and also includes an expansion seal 11, and the expansion seal 11 is two and is respectively arranged in the first mounting groove 1001 and the second mounting groove 1002. After the expansion seal 11 expands, it separates the low-speed sedimentation zone 108 from top to bottom, and separates the overflow zone 109 from top to bottom. The second cavity 103 has a second sewage outlet 110 at the bottom.

[0047] In this embodiment, the third baffle is provided with a first mounting groove 1001 facing the low-speed sedimentation area 108 and a second mounting groove 1002 facing the overflow area 109. In the two mounting grooves, expansion seals 11 are respectively provided. The two expansion seals 11 can expand after activation, thereby effectively separating the upper and lower spaces of the low-speed sedimentation area 108 and the upper and lower spaces of the overflow area 109. The purpose of such a design is that during the flocculation and clarification process, when there is a lot of sludge at the bottom of the second cavity 103, the upper and lower spaces of the low-speed sedimentation area 108 and the upper and lower spaces of the overflow area 109 are effectively separated, so that the sludge at the bottom of the second cavity 103 can be discharged from the second sewage outlet 110, ensuring the efficiency and stability of the overall operation of the equipment. Through the isolation effect of the expansion seal 11, the continuous flocculation and sedimentation process is guaranteed, the shutdown when cleaning the floccules at the bottom of the second sedimentation chamber 101 is avoided, and the flocculation treatment efficiency of sewage is improved.

[0048] Furthermore, the tank body 1 has an observation port, which is located on the side wall of the tank body 1 and below the outlet 106 .

[0049] In this embodiment, an observation port is provided on the side wall of the tank body 1 of the device, and the position of the observation port is carefully designed below the outlet 106 of the side wall of the tank body 1. The setting of the observation port is mainly to facilitate the operator to intuitively monitor and understand the liquid state of the overflow chamber during the flocculation and clarification process, especially important information such as clarity. Through the observation port, the staff can view and judge in real time whether the flocculation and clarification process is normal, and whether the bottom of the second cavity 103 needs to be cleaned. At the same time, since the observation port is located below the outlet 106, the last clarification process before the water outlet can be clearly seen, which is of great significance for ensuring that the effluent water quality meets the standard and timely discovering potential problems.

[0050] Furthermore, the cover body 4 is hemispherical.

[0051] In this embodiment, the cover body 4 is designed as a hemispherical structure. The design of the hemispherical cover body 4 can increase the reaction space: the hemispherical cover body 4 can provide a larger outer wall surface compared to other shapes, and help to form a more uniform water flow distribution, which is conducive to the full mixing and contact between sewage and flocculants, and improve the flocculation effect; reduce dead angles: the hemispherical design can effectively reduce the vortex and dead water areas that may be formed when the water flows, and enhance the collision opportunities of suspended matter during the sewage flocculation process, thereby improving the clarification efficiency; excellent mechanical properties: when the hemispherical cover body 4 is subjected to external pressure, the stress distribution is relatively uniform, thereby enhancing the overall structural stability of the equipment; easy to install and clean: the hemispherical cover body 4 has a simple structure, is easy to manufacture and install, and during cleaning and maintenance, its smooth and angular characteristics are also conducive to reducing dirt accumulation and improving the convenience of cleaning operations. In summary, this hemispherical cover body 4 design has a positive effect on the functional optimization and long-term stable operation of flocculation and clarification sewage treatment equipment.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A flocculation and clarification sewage treatment equipment, characterized in that: include A tank body (1), wherein the tank body (1) has a sedimentation chamber (101), an outer liquid inlet pipe (2), the outer liquid inlet pipe (2) penetrating the tank body (1) from the bottom, an inner liquid inlet tube (3), the inner liquid inlet tube (3) being arranged inside the outer liquid inlet tube (2), and forming a flocculant inlet channel (201) between the inner liquid inlet tube (3) and the outer liquid inlet tube (2), the inner liquid inlet tube (3) having a sewage inlet channel (301), the flocculant inlet channel (201) and the sewage inlet channel (301) both leading to the sedimentation chamber (101), A cover body (4), the cover body (4) being arranged in the sedimentation chamber (101) and located above the flocculating drug inlet channel (201) and the sewage inlet channel (301), the cover body (4) having a plurality of through holes (401).

2. The flocculation and clarification sewage treatment equipment according to claim 1, characterized in that: Also includes a first annular baffle (5), the first annular baffle (5) being arranged outside the liquid inlet outer tube (2) and having a distance (501) between the first annular baffle (5) and the bottom of the sedimentation chamber (101), a second annular baffle (6), the second annular baffle (6) being arranged between the first annular baffle (5) and a side wall of the sedimentation chamber (101), the second annular baffle (6) dividing the sedimentation chamber (101) into a first chamber (102) and a second chamber (103), and the first annular baffle (5) dividing the first chamber (102) into a flocculation zone (104) and a sedimentation zone (105), The tank body (1) has an outlet (106), and the upper end of the second annular baffle (6) is higher than the outlet (106).

3. The flocculation and clarification sewage treatment equipment according to claim 2, characterized in that: It also comprises a scraper (7), the scraper (7) being rotatably disposed in the flocculation zone (104), the scraper (7) being sleeved on the liquid inlet outer tube (2) and abutting against the first annular baffle (5).

4. The flocculation and clarification sewage treatment equipment according to claim 3, characterized in that: The bottom of the first cavity (102) is conical, and the bottom of the first cavity (102) is provided with a first sewage outlet (107).

5. The flocculation and clarification sewage treatment equipment according to claim 4, characterized in that: Also includes A material receiving member (8), the material receiving member (8) being arranged at the bottom of the scraping member (7), the material receiving member (8) having a plurality of circumferentially arranged material collecting grooves (9), the groove walls of the material collecting grooves (9) having mesh-like through holes, the material collecting grooves (9) having a material collecting opening, the opening direction of the material collecting opening being along the radial direction of the tank body (1) and leading to the first sewage outlet (107).

6. The flocculation and clarification sewage treatment equipment according to claim 2, characterized in that: Also includes A third annular baffle (10), the third annular baffle (10) being arranged in the second cavity (103), the third annular baffle (10) being spaced apart from the bottom of the second cavity (103) by a distance (501), a low-speed sedimentation zone (108) being between the third annular baffle (10) and the second annular baffle (6), and an overflow zone (109) being between the third annular baffle (10) and the inner wall of the sedimentation cavity (101).

7. The flocculation and clarification sewage treatment equipment according to claim 6, characterized in that: The third annular baffle (10) comprises a first mounting groove (1001) and a second mounting groove (1002), wherein the first mounting groove (1001) faces the low-speed sedimentation area (108) and the second mounting groove (1002) faces the overflow area (109), and further comprises an expansion seal (11), wherein the expansion seal (11) is two and is respectively arranged in the first installation groove (1001) and the second installation groove (1002); after the expansion seal (11) is expanded, the low-speed sedimentation area (108) is separated from top to bottom, and the overflow area (109) is separated from top to bottom. The second cavity (103) has a second sewage outlet (110) at the bottom.

8. The flocculation and clarification sewage treatment equipment according to claim 2, characterized in that: The tank body (1) has an observation port, which is located on a side wall of the tank body (1) and below the outlet (106).

9. The flocculation and clarification sewage treatment equipment according to claim 1, characterized in that: The cover body (4) is hemispherical.

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