Sewage treatment and purification equipment

Abstract

The invention discloses sewage treatment and purification equipment, which relates to the technical field of sewage treatment and comprises a treatment tank and a purification mechanism, the purification mechanism comprises a mixing structure, a filtering structure, a purification structure, a blow-off pipe and a plugging structure; the filtering seat and the cleaning structure are matched to filter impurities in the sewage, and the purifying structure can purify and filter the sewage added with a purifying agent; a filtering structure, a fan-shaped moving plate, a connecting ring, a limiting ring, a limiting rod, a first rack, a transmission gear and a second rack are matched to align a blocking plate with the filtering structure and block a filtering seat, so that a top tank and a bottom tank are divided into two areas, impurity precipitates can be discharged from the top tank, the filtering structure is prevented from being blocked by impurities, and the service life of the filtering structure is prolonged. The flocculation treatment and purification efficiency of the purification structure is improved, a worker does not need to close the treatment tank for disassembly and maintenance, the labor intensity of the worker is reduced, and the use effect of the sewage treatment and purification equipment is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sewage treatment, and specifically relates to a sewage treatment and purification equipment. BACKGROUND

[0002] Sewage refers to water contaminated by human activities or natural processes, and the water body loses its original use function. The pollution may be caused by changes in physical properties (such as turbidity increase) or changes in chemical composition (such as increase of organic matter and heavy metals), which leads to the inability to directly drink, irrigate or use in industry. Sewage treatment refers to the process of purifying water containing pollutants such as domestic sewage and industrial wastewater through physical, chemical and biological technologies, so as to meet the discharge or reuse standards. The sewage treatment and purification equipment is a special equipment system that removes, degrades or transforms pollutants in sewage through the comprehensive application of physical, chemical and biological technologies, so as to meet the discharge standards or reuse requirements. The core goal is to protect the water environment, ensure public health and realize resource recycling.

[0003] The existing sewage treatment and purification equipment has certain disadvantages in use. The existing sewage treatment and purification equipment usually needs to add a purifying agent to mix with the sewage, so as to produce a large amount of impurities. The impurities need to be filtered during the sedimentation process, and the purified sewage is discharged, which will leave a large amount of impurities. The impurities are easy to block, and it is inconvenient to clean the impurities inside. The flocculation treatment and purification efficiency are greatly reduced, which greatly reduces the use effect of the sewage treatment and purification equipment and cannot meet the needs of people. SUMMARY

[0004] The present application aims to solve the technical problems existing in the prior art. To this end, the present application provides a sewage treatment and purification equipment.

[0005] A sewage treatment and purification equipment, comprising: a treatment tank and a purification mechanism arranged inside the treatment tank and used for purifying sewage; the purification mechanism comprises a mixing structure arranged at the lower part of the inner side of the treatment tank and used for centrifugal sedimentation of the sewage, a filtering structure arranged at the middle part of the inner side of the treatment tank and used for filtering treatment of the sewage, and a purification structure arranged at the upper part of the inner side of the treatment tank and used for reagent purification of the sewage after filtering; the purification mechanism further comprises a blowdown pipe arranged between the filtering structure and the purification structure and used for removing flocculation bodies generated during the purification of the sewage, and a blocking structure movably arranged on the filtering structure and used for blocking the filtering structure; and the treatment tank comprises a bottom tank used for mounting the mixing structure and a top tank in communication with the bottom tank and used for mounting the purification structure.

[0006] As a further scheme of the present application: the filter structure comprises a filter seat detachably arranged on the inner wall of the treatment tank and a cleaning structure movably arranged on the lower end surface of the filter seat and capable of cleaning the dirt adhered to the filter seat; the upper end surface of the filter seat is provided with a filter groove matched with the plugging structure; the filter seat is provided with a plurality of groups of filter holes arranged in alignment with the plugging structure; the top of the bottom tank is provided with a mounting groove for mounting the filter structure; and the filter seat is in a circular structure.

[0007] As a further scheme of the present application: the plugging structure comprises a plurality of groups of plugging plates movably arranged in the filter groove and capable of plugging the filter holes and a connecting ring fixedly connecting the plurality of groups of plugging plates in a circular array; the purification mechanism further comprises a limiting assembly arranged on the upper side of the plugging structure and connecting the plugging plates with the mixing structure or the purification structure; the outer side of the connecting ring is provided with a limiting ring detachably connected with the transmission assembly; the plugging plate is provided with a limiting slot matched with the limiting ring; and the connecting ring and the limiting ring are coaxially connected.

[0008] As a further scheme of the present application: the limiting assembly comprises a plurality of groups of limiting rods capable of connecting the plugging plates with the limiting ring, a transmission structure for controlling the limiting rods to move up and down, and a sector-shaped moving plate for controlling the transmission structure to work; the inner wall of the treatment tank is provided with a support seat for sealing and protecting the limiting assembly; the sector-shaped moving plate is in a hollow structure; the inside of the support seat is provided with a groove for the movement of the transmission structure and the limiting rods; and the sector-shaped moving plate is moved by the limiting rods controlled by the transmission structure under the action of external dirt, so that the limiting rods are connected with the limiting ring.

[0009] As a further scheme of the present application: the transmission structure comprises a first rack movably arranged in the inside of the support seat and connected with the limiting rods, a transmission gear for controlling the first rack to rotate, and a second rack engaged with the transmission gear; one end of the second rack is provided with a moving rod protruding out of the support seat and connected with the sector-shaped moving plate; the outer wall of the support seat is provided with a plurality of groups of moving holes matched with the moving rod; and the outer wall of the support seat is provided with a sealing structure matched with the moving rod; the second rack drives the transmission gear to rotate, so that the transmission gear drives the first rack to move, and the first rack drives the limiting rods to move.

[0010] As a further scheme of the present application: the mixing structure comprises a rotating rod rotatably arranged in the inside of the treatment tank and a plurality of groups of mixing paddles arranged on the lower part of the rotating rod; the top end of the rotating rod is rotatably arranged on the inner top surface of the treatment tank; the upper end of the treatment tank is provided with a driving structure for controlling the rotating rod to rotate; and the connecting ring is detachably mounted on the rotating rod; the driving structure controls the plurality of groups of mixing paddles to rotate through the rotating rod, so that the mixing paddles drive the sewage to rotate, thereby precipitating the hard impurities in the sewage through centrifugal force.

[0011] As a further scheme of the present application: the purification mechanism further comprises a plurality of groups of flow guides arranged in a circular array on the inner wall of the treatment tank, a plurality of groups of aeration members detachably mounted on the inclined surface of the flow guide, and an aeration device arranged on the outer wall of the treatment tank and communicating with the plurality of groups of aeration members, the outer wall of the bottom tank is provided with a gas guide ring communicating with the aeration members, and the plurality of groups of aeration members are arranged in a stepped manner on the flow guide, capable of deep dissolved oxygen, oxidation of refractory pollutants, the aeration device is arranged outside the gas guide ring and is provided with a gas guide pipe communicating with the aeration members; the side of the flow guide away from the treatment tank is arranged as an inclined surface, and gaps are arranged between the plurality of groups of flow guides, the aeration device and the aeration member cooperate to optimize fluid dynamics, strengthen gas-liquid mass transfer and sludge mixing, and significantly improve treatment efficiency and system stability.

[0012] As a further scheme of the present application: the purification structure comprises a filter cover detachably fixed with the rotating rod and a rotating seat arranged outside the filter cover and rotatingly limiting the filter cover; the outer wall of the filter cover is provided with a plurality of rotating blocks arranged in the rotating seat, the filter cover can filter sewage after adding purification reagent, and the rotating seat can improve the stability of the rotation of the filter cover.

[0013] As a further scheme of the present application: the purification mechanism further comprises a support plate detachably mounted on the inner wall of the treatment tank and supporting the filter cover and the rotating seat, and a cleaning scraper detachably mounted on the support plate and cleaning impurities on the inner wall of the filter cover, the support plate is provided with a groove communicating with the filter seat; the lower end surface of the support plate is fixed with the upper end surface of the support seat, the cleaning scraper can clean the impurities adhered on the filter cover, and the cleaned impurities can fall into the blowdown area of the blowdown pipe.

[0014] As a further scheme of the present application: the purification mechanism further comprises a blowdown structure detachably mounted on the outer wall of the treatment tank and extending into the bottom of the treatment tank, and a dosing pipe arranged on the outer wall of the treatment tank; the upper side of the outer wall of the treatment tank is provided with a water outlet pipe, the treatment tank is provided with a water inlet pipe, the blowdown structure comprises a blowdown pipe detachably fixed with the bottom tank and a spiral blowdown member arranged in the blowdown pipe, one end of the blowdown pipe is provided with a support block, one end of the spiral blowdown member extends into the inside of the treatment tank and is rotatably connected with the inner wall of the bottom tank, the lower side of the end of the blowdown pipe close to the support block is provided with a blowdown opening, and the support block is provided with a driving motor for controlling the rotation of the spiral blowdown member.

[0015] Compared with the prior art, the present application has the following advantages: (1) The application is provided with a treatment tank and a purification mechanism, a filter seat and a cleaning structure cooperate to filter impurities in sewage, the purification structure can purify and filter the sewage after adding a purifying agent, the filter structure, the fan-shaped moving plate, the connecting ring, the limiting ring, the limiting rod, the first rack, the transmission gear and the second rack cooperate to align the blocking plate with the filter structure and block the filter seat, so that the top tank and the bottom tank are separated into two areas, thereby the impurities can be precipitated and discharged from the top tank, avoiding the impurities from blocking the filter structure, improving the purification efficiency of the purification structure on flocculation treatment, without the need for workers to close and disassemble the treatment tank for maintenance, reducing the labor intensity of workers and improving the use effect of the sewage treatment and purification equipment.

[0016] (2) The application is provided with a purification mechanism, a driving structure, a rotating rod, a mixing paddle and a cleaning structure, which can make the impurities in the sewage precipitate quickly and clean the impurities adhered to the filter seat, reduce the number of times of cleaning the filter seat, the flow guide piece, the aeration piece, the aeration equipment and the air guide ring make the bubbles adsorb fine pollutants, combined with the inclined plate sedimentation, strengthen the solid-liquid separation, the supporting block, the driving motor, the sewage pipe and the spiral sewage discharge piece cooperate to discharge the impurities after precipitation from the treatment tank, the rotating seat and the rotating block cooperate to improve the stability of the filter cover during rotation, and the centrifugal force generated by the rotating filter cover makes the radial distribution of the sewage more uniform, combined with the supporting plate and the cleaning scraper, the impurities adhered to the filter cover can be cleaned, improving the purification effect of the purification mechanism and reducing the number of times of cleaning the filter cover. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure diagram of the application.

[0018] Figure 2 It is the sectional view of the treatment tank and the purification mechanism in the application.

[0019] Figure 3 It is the partial structure diagram of the purification mechanism in the application.

[0020] Figure 4 It is the partial structure diagram of the blocking structure and the filter seat in the application.

[0021] Figure 5 It is the partial structure diagram of the transmission structure and the fan-shaped moving plate in the application.

[0022] Figure 6 It is the partial structure diagram of the blocking structure and the limiting ring in the application.

[0023] Figure 7 It is the partial structure diagram of the purification structure in the application.

[0024] Figure 8 It is the partial structure of the cleaning structure in the application.

[0025] In the figure: 1, treatment tank; 2, mixing structure; 3, filtering structure; 4, purification structure; 5, blowdown pipe; 6, blocking structure; 7, filter seat; 8, cleaning structure; 9, filter groove; 10, blocking plate; 11, connecting ring; 12, limiting ring; 13, limiting rod; 14, transmission structure; 15, sector-shaped moving plate; 16, support seat; 17, first rack; 18, transmission gear; 19, second rack; 20, moving rod; 21, rotating rod; 22, mixing paddle; 23, driving structure; 24, flow guide; 25, aerator; 26, aeration device; 27, rotating block; 28, support plate; 29, cleaning scraper; 30, blowdown structure; 31, dosing pipe; 32, water outlet pipe; 33, filter cover; 34, rotating seat; 35, bottom tank; 36, top tank; 37, water inlet pipe; 38, sealing structure; 39, blowdown pipe; 40, spiral blowdown element; 41, support block; 42, driving motor; 43, air guide ring; 44, cleaning scraper; 45, connecting element. DETAILED DESCRIPTION

[0026] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0027] Embodiment one Please refer to Figure 1 - Figure 6 The present application provides a sewage treatment and purification device, which comprises a treatment tank 1 and a purification mechanism arranged inside the treatment tank 1 and used for purifying sewage; the purification mechanism comprises a mixing structure 2 arranged rotatably at the lower part of the inner side of the treatment tank 1 and used for centrifugal sedimentation of the sewage, a filtering structure 3 arranged at the middle part of the inner side of the treatment tank 1 and used for filtering treatment of the sewage, and a purification structure 4 arranged at the upper part of the inner side of the treatment tank 1 and used for chemical purification of the sewage after filtering; the purification mechanism further comprises a blowdown pipe 5 arranged between the filtering structure 3 and the purification structure 4 and used for removing flocculation bodies generated in the purification of the sewage, and a blocking structure 6 movably arranged on the filtering structure 3 and used for blocking the filtering structure 3; the treatment tank 1 comprises a bottom tank 35 for mounting the mixing structure 2 and a top tank 36 in communication with the bottom tank 35 and used for mounting the purification structure 4.

[0028] In the embodiment, the sewage is introduced into the bottom tank 35, the mixing structure 2 is started to make the impurities in the sewage to be precipitated, the sewage enters the top tank 36 through the filtering structure 3 to make the purification structure 4 purify the sewage, and after the purification structure 4 cleans the dirt, the blocking structure 6 blocks the filtering structure 3 and blowdown is performed.

[0029] The filtering structure 3 comprises a filtering seat 7 detachably arranged on the inner wall of the processing tank 1 and a cleaning structure 8 movably arranged on the lower end surface of the filtering seat 7 and used for cleaning the dirt adhered to the filtering seat 7, the cleaning structure 8 comprises a cleaning scraper 44 movably arranged on the lower end surface of the filtering seat 7 and a connecting piece 45 used for detachably fixing the cleaning scraper 44 to the rotating rod 21; the upper end surface of the filtering seat 7 is provided with a filtering groove 9 matched with the plugging structure 6; the filtering seat 7 is provided with a plurality of groups of filtering holes arranged in alignment with the plugging structure 6; the top of the bottom tank 35 is provided with a mounting groove used for mounting the filtering structure 3; and the filtering seat 7 has a circular structure.

[0030] In the embodiment, the filtering holes on the filtering seat 7 are used for filtering the sewage, and the filtered sewage is guided into the purifying structure 4 for purification; when the rotating rod 21 rotates, the rotating rod 21 drives the connecting piece 45 to rotate, so that the connecting piece 45 drives the cleaning scraper 44 to rotate, and the dirt adhered to the lower end surface of the filtering seat 7 is cleaned.

[0031] The plugging structure 6 comprises a plurality of groups of plugging plates 10 movably arranged in the filtering groove 9 and used for plugging the filtering holes and a connecting ring 11 used for fixedly connecting the plurality of groups of plugging plates 10 in a circular array; the purifying mechanism further comprises a limiting assembly arranged on the upper side of the plugging structure 6 and used for connecting the plugging plates 10 to the mixing structure 2 or the purifying structure 4; the outer side of the connecting ring 11 is provided with a limiting ring 12 detachably connected to the transmission assembly; the plugging plates 10 are provided with limiting insertion grooves matched with the limiting ring 12; and the connecting ring 11 and the limiting ring 12 are coaxially connected.

[0032] In the embodiment, when the dirt accumulated in the filtering groove 9 contacts the limiting assembly, the limiting assembly controls the limiting ring 12 to be connected to the connecting ring 11; when the rotating rod 21 rotates to drive the connecting ring 11 to rotate, the connecting ring 11 drives the plugging plates 10 to rotate, so that the plugging plates 10 plug the filtering holes on the filtering seat 7, and the bottom tank 35 and the top tank 36 are divided into two areas.

[0033] The limiting assembly comprises a plurality of groups of limiting rods 13 used for connecting the plugging plates 10 to the limiting ring 12, a transmission structure 14 used for controlling the limiting rods 13 to move up and down, and a sector-shaped moving plate 15 used for controlling the transmission structure 14 to work; the inner wall of the processing tank 1 is provided with a supporting seat 16 used for sealing and protecting the limiting assembly; the sector-shaped moving plate 15 has a hollow structure; the inside of the supporting seat 16 is provided with grooves used for the movement of the transmission structure 14 and the limiting rods 13; the sector-shaped moving plate 15 is affected by the external dirt and moves through the transmission structure 14 to control the limiting rods 13 to move, so that the limiting rods 13 are connected to the limiting ring 12.

[0034] In the embodiment, when the sector-shaped moving plate 15 moves, the sector-shaped moving plate 15 drives the transmission structure 14 to work, the transmission structure 14 drives the limiting rod 13, and the limiting rod 13 is inserted into the limiting groove to connect the limiting ring 12 and the connecting ring 11.

[0035] In the embodiment, the transmission structure 14 comprises a first rack 17 movably arranged in the supporting seat 16 and connected with the limiting rod 13, a transmission gear 18 for controlling the first rack 17 to rotate, and a second rack 19 engaged with the transmission gear 18; one end of the second rack 19 is provided with a moving rod 20 extending out of the supporting seat 16 and connected with the sector-shaped moving plate 15, the outer wall of the supporting seat 16 is provided with a plurality of moving holes matched with the moving rod 20, and the outer wall of the supporting seat 16 is provided with a sealing structure 38 matched with the moving rod 20; the second rack 19 drives the transmission gear 18 to rotate, the transmission gear 18 drives the first rack 17 to move, and the first rack 17 drives the limiting rod 13 to move.

[0036] In the embodiment, the sector-shaped moving plate 15 drives the moving rod 20 to move, the moving rod 20 drives the second rack 19 to move, the second rack 19 drives the transmission gear 18 to move, the transmission gear 18 drives the limiting rod 13 to move through the first rack 17, and the limiting rod 13 is inserted into the limiting groove.

[0037] Embodiment two Refer to Figure 3 - Figure 8 In the embodiment, the mixing structure 2 comprises a rotating rod 21 rotatably arranged in the treatment tank 1 and a plurality of mixing paddles 22 arranged at the lower part of the rotating rod 21; the top end of the rotating rod 21 is rotatably arranged at the inner top surface of the treatment tank 1; the upper end of the treatment tank 1 is provided with a driving structure 23 for controlling the rotating rod 21 to rotate, and the connecting ring 11 is detachably arranged on the rotating rod 21; the driving structure 23 controls the plurality of mixing paddles 22 to rotate through the rotating rod 21, the mixing paddles 22 drive the sewage to rotate, and the hard impurities in the sewage are precipitated through centrifugal force.

[0038] In the embodiment, the driving structure 23 is started to drive the rotating rod 21 to rotate, the rotating rod 21 drives the mixing paddles 22 to rotate, the mixing paddles 22 drive the sewage to rotate, and the hard impurities in the sewage are precipitated through centrifugal force.

[0039] The purification mechanism in the application further comprises a plurality of groups of flow guide members 24 arranged in a circular array on the inner wall of the treatment tank 1, a plurality of groups of aeration members 25 detachably installed on the inclined surface of the flow guide member 24, and an aeration device 26 arranged on the outer wall of the treatment tank 1 and communicating with the plurality of groups of aeration members 25, the outer wall of the bottom tank 35 is provided with a gas guide ring 43 communicating with the aeration member 25, and the aeration device 26 is arranged outside the gas guide ring 43 and is provided with a gas guide pipe communicating with the aeration member 25; the side surface of the flow guide member 24 away from the treatment tank 1 is arranged as an inclined surface, and gaps are arranged between the plurality of groups of flow guide members 24, and the aeration device 26 and the aeration member 25 cooperate to optimize fluid dynamics, strengthen gas-liquid mass transfer and mix sludge, thereby significantly improving treatment efficiency and system stability.

[0040] In the embodiment, the aeration device 26 introduces gas into the aeration member 25 through the gas guide pipe, so that the aeration member 25 aerates the sewage.

[0041] The purification structure 4 in the application comprises a filter cover 33 detachably fixed with the rotating rod 21 and a rotating seat 34 arranged outside the filter cover 33 and rotationally limiting the filter cover 33; the outer wall of the filter cover 33 is provided with a plurality of groups of rotating blocks 27 rotationally arranged in the interior of the rotating seat 34, and the interior of the rotating seat 34 is provided with a circular rotating groove matched with the rotating block 27, the filter cover 33 can filter the sewage after adding purification reagents, and the rotating seat 34 can improve the stability of rotation of the filter cover 33.

[0042] In the embodiment, the rotating rod 21 drives the filter cover 33 to rotate, the filter cover 33 drives the rotating block 27 to rotate in the interior of the rotating seat 34, so that the filter cover 33 purifies the sewage, and the purified sewage passes through the filter cover 33.

[0043] The purification mechanism in the application further comprises a support plate 28 detachably installed on the inner wall of the treatment tank 1 and supporting the filter cover 33 and the rotating seat 34, and a cleaning scraper 29 detachably installed on the support plate 28 and cleaning the impurities on the inner wall of the filter cover 33, and the support plate 28 is provided with a groove communicating with the filter seat 7; the lower end surface of the support plate 28 is fixed with the upper end surface of the support seat 16, the cleaning scraper 29 can clean the impurities adhered to the inner wall of the filter cover 33, and the cleaned impurities can fall into the blowdown area of the blowdown pipe 5.

[0044] In the embodiment, when the filter cover 33 rotates, the cleaning scraper 29 cleans the impurities adhered to the inner wall of the filter cover 33 and introduces the cleaned impurities into the filter seat 7.

[0045] The purifying mechanism further comprises a sewage discharging structure 30 detachably installed on the outer wall of the treatment tank 1 and extending into the bottom of the inside of the treatment tank 1, and a dosing pipe 31 arranged on the middle side of the outer wall of the treatment tank 1; a water outlet pipe 32 is arranged on the upper side of the outer wall of the treatment tank 1, and a water inlet pipe 37 is arranged on the treatment tank 1; the sewage discharging structure 30 comprises a sewage discharging pipe 39 detachably fixed with a bottom tank 35 and a spiral sewage discharging piece 40 arranged in the sewage discharging pipe 39; one end of the sewage discharging pipe 39 is provided with a supporting block 41; one end of the spiral sewage discharging piece 40 extends into the inside of the treatment tank 1 and is rotationally connected with the inner wall of the bottom tank 35; a sewage discharging opening is arranged on the lower side of the end of the sewage discharging pipe 39 close to the supporting block 41; and a driving motor 42 for controlling the rotation of the spiral sewage discharging piece 40 is arranged on the supporting block 41.

[0046] In the embodiment, the water inlet pipe 37 guides the sewage into the treatment tank 1, so that part of the impurities in the sewage are precipitated; the driving motor 42 is started to drive the spiral sewage discharging piece 40 to discharge the impurities after precipitation out of the treatment tank 1; and the dosing pipe 31 adds purifying reagents into the inside of the treatment tank 1 to purify the sewage.

[0047] The above embodiments are only used to illustrate the technical method of the present application but not limit the present application; although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical method of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical method of the present application.

Claims

1. A wastewater treatment and purification device, characterized in that, Include: The processing tank (1) and the purification mechanism arranged inside the processing tank (1) and purifying sewage; The purification mechanism includes a mixing structure (2) rotatably arranged at the lower part of the inside of the processing tank (1) and centrifugally precipitating sewage, a filtering structure (3) arranged at the middle part of the inside of the processing tank (1) and filtering sewage, and a purification structure (4) arranged at the upper part of the inside of the processing tank (1) and purifying sewage after filtering; The purification mechanism further includes a sewage discharge pipe (5) arranged between the filtering structure (3) and the purification structure (4) and discharging flocculation bodies generated during sewage purification, and a blocking structure (6) movably arranged on the filtering structure (3) and blocking the filtering structure (3).

2. The sewage treatment and purification apparatus according to claim 1, wherein The filtering structure (3) includes a filter seat (7) detachably arranged on the inner wall of the processing tank (1) and a cleaning structure (8) movably arranged on the lower end surface of the filter seat (7) and cleaning the dirt adhered to the filter seat (7); The upper end surface of the filter seat (7) is provided with a filtering groove (9) matched with the blocking structure (6); The filter seat (7) is provided with a plurality of groups of filtering holes arranged in alignment with the blocking structure (6).

3. The sewage treatment and purification apparatus according to claim 1, wherein The blocking structure (6) includes a plurality of groups of blocking plates (10) movably arranged in the filtering groove (9) and capable of blocking the filtering holes, and a connecting ring (11) fixedly connecting the plurality of groups of blocking plates (10) in a circular array; The purification mechanism further includes a limiting assembly arranged on the upper side of the blocking structure (6) and connecting the blocking plate (10) with the mixing structure (2) or the purification structure (4); The outer side of the connecting ring (11) is provided with a limiting ring (12) detachably connected with the transmission assembly.

4. A sewage treatment purification apparatus according to claim 3, wherein The limiting assembly includes a plurality of groups of limiting rods (13) capable of connecting the blocking plate (10) with the limiting ring (12), a transmission structure (14) controlling the limiting rod (13) to move up and down, and a sector-shaped moving plate (15) controlling the transmission structure (14) to work; The inner wall of the processing tank (1) is provided with a supporting seat (16) sealing and protecting the limiting assembly.

5. A sewage treatment purification apparatus according to claim 4, wherein The transmission structure (14) includes a first rack (17) movably arranged in the supporting seat (16) and connected with the limiting rod (13), a transmission gear (18) controlling the first rack (17) to rotate, and a second rack (19) engaged with the transmission gear (18); One end of the second rack (19) is provided with a moving rod (20) extending out of the supporting seat (16) and connected with the sector-shaped moving plate (15).

6. A sewage treatment purification apparatus according to claim 5, wherein The mixing structure (2) includes a rotating rod (21) rotatably arranged inside the processing tank (1) and a plurality of groups of mixing paddles (22) arranged at the lower part of the rotating rod (21); The top end of the rotating rod (21) is rotatably arranged at the inner top surface of the processing tank (1); The upper end of the processing tank (1) is provided with a driving structure (23) for controlling the rotating rod (21) to rotate.

7. A sewage treatment purification apparatus according to claim 6, wherein The purification mechanism further comprises a plurality of groups of flow guides (24) arranged in a circular array on the inner wall of the treatment tank (1), a plurality of groups of aeration members (25) detachably installed on the inclined surface of the flow guides (24), and an aeration device (26) arranged on the outer wall of the treatment tank (1) and communicated with the plurality of groups of aeration members (25). The side of the flow guide (24) away from the treatment tank (1) is arranged as an inclined surface.

8. A sewage treatment purification apparatus according to claim 6, wherein The purification structure (4) comprises a filter cover (33) detachably fixed with the rotating rod (21) and a rotating seat (34) arranged outside the filter cover (33) and rotationally limiting the filter cover (33). The outer wall of the filter cover (33) is provided with a plurality of groups of rotating blocks (27) rotatably arranged in the rotating seat (34).

9. A sewage treatment purification apparatus according to claim 8, wherein The purification mechanism further comprises a support plate (28) detachably installed on the inner wall of the treatment tank (1) and supporting the filter cover (33) and the rotating seat (34), and a cleaning scraper (29) detachably installed on the support plate (28) and cleaning the impurities on the inner wall of the filter cover (33). The lower end surface of the support plate (28) is fixed with the upper end surface of the support seat (16).

10. A sewage treatment purification apparatus according to claim 9, wherein The purification mechanism further comprises a blowdown structure (30) detachably installed on the outer wall of the treatment tank (1) and extending into the bottom of the treatment tank (1), and a dosing pipe (31) arranged on the outer wall of the treatment tank (1) and extending into the middle side of the treatment tank (1). The outer wall of the treatment tank (1) is provided with a water outlet pipe (32) on the upper side.

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