Urban wastewater treatment and recovery equipment and treatment method

Abstract

The urban wastewater treatment and recycling equipment disclosed in the present invention includes a recycling box and a sewage box. A partition, a baffle and a primary filter layer filter plate are provided in the middle of the recycling box to form a T-shaped symmetrical plate body. The T-shaped plate body divides the inner cavity of the recycling box into a primary filter part, a middle part and an outlet part in sequence. In the present invention, when multiple extrusion columns act on the rubber rod group on the primary filter layer in sequence, a jerky interaction is formed. This jerky interaction realizes the scraping of impurities on the bottom surface of the primary filter layer. At the same time, the scraping will cause the primary filter layer to shake up and down, making it easier to remove the attached impurities, which can effectively reduce the impurities attached to the primary filter layer, so that the primary filter layer can ensure a better filtering effect; a sewage box is provided at the bottom of the recycling box, and the drain trough is connected to the sewage box. After the impurities are settled, they are transferred from the primary filter part to the sewage box; a sewage structure is provided inside the sewage box for sewage discharge operation.

Description

Technical Field

[0001] The present invention relates to the technical field of urban sewage recovery, in particular to urban sewage treatment and recovery equipment and a treatment method thereof. Background Art

[0002] The amount of sewage generated in cities is very huge. Directly discharging it into rivers will cause a lot of pollution to the natural environment. For environmental protection needs, people are paying more and more attention to the discharge of daily urban sewage. There are also resources with utilization value in urban sewage. For this reason, urban sewage purification equipment has been produced to purify urban sewage.

[0003] In the existing urban sewage recycling and treatment equipment, during the filtration process, due to the large amount of impurities in urban sewage, the filtering components are often congested, so the staff are required to check and clean the impurities, which increases the workload. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the above-mentioned technology and to provide a municipal wastewater treatment and recovery device and a treatment method thereof.

[0005] The municipal wastewater treatment and recycling equipment designed by the present invention includes a recycling box and a sewage box. The front of the recycling box is provided with a water inlet and a water outlet. The middle of the recycling box is provided with a partition, a baffle and a primary filter plate. The baffle and the primary filter plate are fixedly connected to form a rectangular plate. The rectangular plate and the partition are fixedly connected perpendicularly to each other to form a T-shaped symmetrical plate body. The T-shaped plate body divides the inner cavity of the recycling box into a primary filter part, a middle part and an outlet part in sequence.

[0006] The primary filter part is connected with the water inlet, and a primary filter layer is installed obliquely between the two ends of the inlet and outlet of the primary filter part. Elastic parts are provided at the four corners of the bottom of the two ends of the primary filter layer, and the bottom of the elastic part is fixed to the bottom surface of the recovery box. The four sides of the primary filter layer are respectively fitted on each wall surface of the primary filter part. The primary filter layer includes a primary filter mesh, and the primary filter layer is fixed with a number of equidistantly distributed rubber rods within the range of the primary filter mesh. The several rubber rods form a rubber rod group. A discharge plate is provided just below the primary filter layer, and a second cylinder is provided at one end of the discharge plate. The second cylinder is installed on the outer wall of the recovery box. The second cylinder includes a second cylinder piston rod. The second cylinder piston rod passes through the wall surface of the recovery box and is fixedly connected to the discharge plate. When the second cylinder is in the two states of extension and contraction, leakage grooves are respectively opened on the outer side and inner side of the corresponding discharge plate, and the leakage grooves run through the entire recovery box. The box body, in these two states, a rectangular space is formed with the discharge plate and the partition plate or the side wall of the recovery box body parallel to it as two opposite surfaces. When the second cylinder extends or contracts, the discharge plate pushes the impurities accumulated in the primary filter part into the rectangular space, and the impurities settle to the leakage groove due to gravity and are discharged; the cross-section of the discharge plate is a right-angled trapezoid, and its hypotenuse corresponds to the slope of the primary filter layer. A group of extrusion columns are provided on the top inclined surface of the discharge plate, and the extrusion columns are parallel to the direction of the rubber rod group. The elastic member acts on the primary filter layer downward, and the bottom surface of the discharge plate is slidably arranged on the bottom surface of the recovery box body. The primary filter layer elastically squeezes the extrusion columns of the discharge plate under the action of the elastic member. When the second cylinder extends or contracts, multiple extrusion columns in a group of extrusion columns will act on the rubber rod group on the primary filter layer in turn, forming a setback interaction, so as to realize the scraping of impurities on the bottom surface of the primary filter layer.

[0007] In order to facilitate the discharge of impurities, a sewage box is provided at the bottom of the recovery box, and the leakage groove is connected to the sewage box. After the impurities are settled, they are transferred from the primary filter part to the sewage box; a sewage structure is provided inside the sewage box for sewage discharge operations.

[0008] The elastic part includes four telescopic rods, which are divided into two groups and are fixedly installed between the primary filter layer and the bottom surface of the recovery box respectively. The lengths of the two groups of telescopic rods correspond to the lengths of the two sides of the primary filter layer from the bottom surface of the recovery box when the primary filter layer is installed at an angle. A spring of corresponding length is provided on the outside of each telescopic rod.

[0009] The primary filter plate includes a primary filter screen in the middle, and also includes a solid part on the side close to the partition. When the second cylinder is extended, a well-enclosed discharge space is formed between the solid part, the discharge plate and the partition.

[0010] The sewage discharge structure includes a sewage discharge push plate that fits the inner wall of the sewage discharge box. A through groove is opened on the sewage discharge push plate, and a blocking net is provided on the through groove. A first cylinder is provided on one side of the sewage discharge push plate, and the first cylinder is fixedly installed on the outer wall of the sewage discharge box.

[0011] A sewage outlet is provided at one end of the sewage box away from the first cylinder, and an electric valve is provided in the sewage outlet.

[0012] Two first filter plates are symmetrically arranged on both sides of the middle of the outer end of the rectangular plate formed by the baffle and the primary filter layer filter plate. The first filter plates divide the middle part into three functional areas. The middle and upper layers in the area between the two first filter plates are provided with an oil-absorbing cotton layer.

[0013] A plurality of second filter plates are arranged in the two functional areas at the outer ends of the two first filter plates. The filter apertures of the second filter plates are smaller than the filter apertures of the filter plates of the primary filter layer.

[0014] The outlet part is provided with three mesh plates distributed at equal distances. A filter layer is provided on one side of the two mesh filter plates close to the water outlet. The filter aperture of the filter layer is smaller than the filter aperture of the second filter plate.

[0015] A method for treating municipal wastewater, using the above-mentioned municipal wastewater treatment and recovery equipment, comprises the following steps:

[0016] S1. Collecting municipal wastewater and sewage, quantitatively collecting wastewater and sewage, and transferring them to the water reservoir where the municipal wastewater treatment and recovery equipment is located. The height of the water reservoir is higher than the installation height of the municipal wastewater treatment and recovery equipment, and the water reservoir is connected through a pipe with an electric valve to control the feeding;

[0017] S2. Pre-treating the municipal wastewater, including microbial inoculation, by detachably installing a microbial module at the bottom of a recovery tank of the municipal wastewater treatment and recovery equipment;

[0018] S3, the recycling of urban wastewater and sewage, the sewage is filtered through the primary filter layer through the action of the urban wastewater treatment and recycling equipment, and the filtered sewage enters the middle part of the recovery box, while the filtered impurities are retained in the primary filter part below the primary filter layer. At this time, the second cylinder is extended, and the discharge plate pushes the impurities to one side of the primary filter part. At this time, the impurities are precipitated into the interior of the sewage box through the leakage groove; at this time, the sewage continues to be processed by the urban wastewater treatment and recycling equipment. After a period of time, the primary filter part accumulates impurities, and the second cylinder runs to a contracted state. At this time, the impurities in the primary filter part are pushed to the other side by the discharge plate and precipitated into the sewage box in the leakage groove on the other side; the sewage in the middle part continues to be filtered in the recovery box and is finally discharged; in the sewage box, the sewage discharge structure pushes the impurities to one side of the sewage box for accumulation, and is cleaned regularly; a plurality of aeration devices are added during the entire recycling process, which are used in conjunction with the microbial module to provide a good environment for microorganisms through aeration;

[0019] S4. The impurities in the sewage box are taken out and buried or recycled.

[0020] The urban wastewater treatment and recycling equipment designed by the present invention has a plurality of extrusion columns in a group of extrusion columns that act on the rubber rod group on the primary filter layer in turn, forming a jerky interaction. This jerky interaction is generated by the action of each extrusion column on the rubber rod group. When the first extrusion column squeezes the first contacted rubber rod, the primary filter layer will move slightly upward, and when the first extrusion column enters between the first and second rubber rods, the primary filter layer will slightly reset downward, and when the second extrusion column squeezes the first rubber rod, the primary filter layer will move slightly upward again, and so on, forming the above-mentioned jerky interaction. This interaction realizes the scraping of impurities on the bottom surface of the primary filter layer. At the same time, the scraping will cause the primary filter layer to shake up and down, thereby making it easier to remove attached impurities, which can effectively reduce impurities attached to the primary filter layer, thereby ensuring a better filtering effect of the primary filter layer; a sewage box is provided at the bottom of the recovery box, and the leakage groove is connected to the sewage box. After the impurities are settled, they are transferred from the primary filter part to the sewage box; a sewage discharge structure is provided inside the sewage box for sewage discharge operation;

[0021] The urban wastewater treatment method designed by the present invention can achieve better sewage treatment effect with fast treatment speed and good treatment effect by using the recovery equipment proposed by the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure;

[0023] Figure 2 It will Figure 1 Schematic diagram of the top view of the structure when the middle top is cut off;

[0024] Figure 3 yes Figure 1 The schematic diagram of the structure when the box shell is recycled is hidden in the figure;

[0025] Figure 4 yes Figure 3 Front view of the state;

[0026] Figure 5 yes Figure 3 Schematic diagram of the structure from another angle;

[0027] Figure 6 yes Figure 5 Schematic diagram of the structure in another state (when the second cylinder is contracted);

[0028] Figure 7 It is a schematic diagram of the internal structure of the sewage box.

[0029] In the figure: 1. Recovery box; 2. First cylinder; 3. Sewage box; 4. Second cylinder; 5. Sewage outlet; 6. Water inlet; 7. Water outlet; 8. First filter plate; 9. Second filter plate; 10. Primary filter layer; 11. Primary filter screen; 12. Third filter plate; 13. Mesh filter plate; 14. Filter layer; 15. Partition; 16. Baffle; 17. Primary filter layer filter plate; 18. Primary filter layer screen; 19. Second cylinder piston rod; 20. Discharge plate; 21. Rubber rod group; 22. Spring; 23. Telescopic rod group; 24. Leakage trough; 25. Middle filter plate; 26. Extrusion column; 27. Leakage trough; 28. Sewage push plate; 29. ​​Solid part. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0031] Example:

[0032] like Figure 1-7 As shown, the municipal wastewater treatment and recycling equipment described in this embodiment includes a recovery box 1 and a sewage box 3. The front of the recovery box 1 is provided with a water inlet 6 and a water outlet 7. The middle of the recovery box 1 is provided with a partition 15, a baffle 16 and a primary filter layer filter plate 17. The baffle 16 and the primary filter layer filter plate 17 are fixedly connected to form a rectangular plate. The rectangular plate and the partition 15 are fixedly connected to each other perpendicularly to form a T-shaped symmetrical plate body. The T-shaped plate body divides the inner cavity of the recovery box 1 into a primary filter part, a middle part and an outlet part in sequence; as shown Figure 2 In the figure, the rectangular area at the lower right of the recovery box 1 is the primary filter part, the left side is the middle part, and the upper right side is the outlet part.

[0033] The above-mentioned primary filtration part, such as Figure 2-6 , connected to the water inlet 6, a primary filter layer 10 is installed obliquely between the two ends of the inlet and outlet of the primary filter part, and elastic members are provided at the four corners of the bottom of both ends of the primary filter layer 10. The bottom of the elastic member is fixed to the bottom surface of the recovery box 1, and the four sides of the primary filter layer 10 are respectively arranged on each wall surface of the primary filter part. Figure 4As shown, under this structure, the primary filter layer 10 can only slide up and down. The primary filter layer 10 includes a primary filter screen 11, and the primary filter layer 10 is fixedly installed with several equidistantly distributed rubber rods within the range of the primary filter screen 11. Several rubber rods form a rubber rod group 21. A discharge plate 20 is provided directly below the primary filter layer 10. A second cylinder 4 is provided at one end of the discharge plate 20. The second cylinder 4 is installed on the outer wall of the recovery box 1. The second cylinder 4 includes a second cylinder piston rod 19. The second cylinder piston rod 19 passes through the wall of the recovery box 1 and is fixedly connected to the discharge plate 20.

[0034] When the above-mentioned second cylinder 4 is in the extended and contracted states, the outer and inner sides of the corresponding discharge plate 20 are respectively provided with leakage grooves 24, and the leakage grooves 24 run through the entire recovery box 1. In these two states, a rectangular space is formed with the discharge plate 20 and the partition 15 parallel to it or the side wall of the recovery box 1 as two opposite surfaces. When the second cylinder 4 is extended or contracted, the discharge plate 20 pushes the impurities accumulated in the primary filter part into the rectangular space, and the impurities settle to the leakage groove 24 due to gravity and are discharged.

[0035] In order to facilitate the discharge of impurities, the cross section of the discharge plate 20 is a right-angled trapezoid, with its hypotenuse facing upwards corresponding to the slope of the primary filter layer 10. A group of extrusion columns 26 are provided on the top inclined surface of the discharge plate 20. The extrusion columns 26 are parallel to the direction of the rubber rod group 21. The elastic member acts on the primary filter layer 10 downward, and the bottom surface of the discharge plate 20 is slidably arranged on the bottom surface of the recovery box 1. The primary filter layer 10 elastically squeezes the extrusion columns 26 of the discharge plate 20 under the action of the elastic member (forming a Figure 4 When the second cylinder 4 extends or contracts, multiple squeezing columns in a group of squeezing columns 26 will act on the rubber rod group 21 on the primary filter layer 10 in sequence, forming a jerky interaction. This jerky interaction is generated by the action of each squeezing column 26 on the rubber rod group 21. When the first squeezing column 26 squeezes the first rubber rod in contact, the primary filter layer 10 will move slightly upward. When the first squeezing column 26 enters between the first and second rubber rods, the primary filter layer 10 will reset slightly downward. When the second squeezing column 26 squeezes the first rubber rod, the primary filter layer 10 will reset slightly downward. The filter layer 10 will move slightly upwards, and so on, forming the above-mentioned interaction of setbacks. This interaction realizes the scraping of impurities on the bottom surface of the primary filter layer 10. At the same time, the primary filter layer 10 will shake up and down during scraping, making it easier to remove the attached impurities, which can effectively reduce the impurities attached to the primary filter layer 10, so that the primary filter layer 10 can ensure a better filtering effect; a sewage box 3 is provided at the bottom of the recovery box 1, and the leakage groove 24 is connected to the sewage box 3. After the impurities are settled, they are transferred from the primary filter part to the sewage box 3; a sewage structure is provided inside the sewage box 3 for sewage discharge operation; attached Figure 4 In the figure, the enlarged view is adjusted in angle and is not the enlarged view at the original angle of the figure. This is set for the convenience of understanding.

[0036] As a preferred embodiment of an elastic member, the elastic member includes four telescopic rods 23. The four telescopic rods 23 are divided into two groups and are fixedly installed between the primary filter layer 10 and the bottom surface of the recovery box 1 respectively. The lengths of the two groups of telescopic rods correspond to the lengths of the primary filter layer 10 on both sides from the bottom surface of the recovery box 1 when the primary filter layer 10 is installed at an angle. The outside of each telescopic rod 23 is provided with a spring 22 of corresponding length. The spring 22 is used for contraction, while the telescopic rod is used for directional positioning, so that the primary filter layer 10 can stably maintain a downward movement trend, that is, when the spring 22 contracts downward, the primary filter layer 10 will have a downward movement trend. With the help of the action of the spring 22, it is easy to realize the frustration effect caused by the action of the extrusion column 26 and the rubber rod group 21.

[0037] In this embodiment, the primary filter layer filter plate 17 includes a primary filter layer screen 18 in the middle, and the primary filter layer filter plate 17 also includes a solid part 29 on the side close to the partition 15. When the second cylinder 4 is extended, a well-enclosed discharge space is formed between the solid part 29 and the discharge plate 20 and the partition 15. Therefore, after the impurities are "driven" into this discharge space by the discharge plate 20, the impurities are easy to settle, reducing the space that escapes back to the outside, thereby achieving a better sewage discharge effect.

[0038] As a preferred embodiment of the sewage discharge structure, the sewage discharge structure includes a sewage discharge push plate 28 that is in contact with the inner wall of the sewage discharge box 3. The sewage discharge push plate 28 has a through slot 27 formed therein, and a blocking net is provided on the through slot 27. A first cylinder 2 is provided on one side of the sewage discharge push plate 28, and the first cylinder 2 is fixedly mounted on the outer wall of the sewage discharge box 3. A sewage discharge port 5 is provided at the end of the sewage discharge box 3 away from the first cylinder 2. The sewage discharge port 5 is equipped with an electric valve. When the electric valve is opened, the piston rod of the first cylinder 2 extends, and the sewage discharge push plate 28 pushes impurities to the end of the sewage discharge box 3. If the sewage discharge port 5 is not provided, impurities can accumulate within the range of this end. With the sewage discharge port 5 provided, impurities can be directly squeezed out.

[0039] Two first filter plates 8 are symmetrically provided on both sides of the middle of the outer end of the rectangular plate formed by the baffle 16 and the primary filter layer filter plate 17. The first filter plate 8 divides the middle part into three functional areas. The middle and upper layers in the area between the two first filter plates 8 are provided with an oil-absorbing cotton layer, which can absorb the upper grease in the sewage.

[0040] Multiple second filter plates 9 are provided in the two functional areas at the outer ends of the two first filter plates 8. The filtration aperture of the second filter plates 9 is smaller than that of the primary filter plate 17. The outlet portion is provided with three equally spaced mesh plates 13. A filter layer 14 is provided on one side of the two mesh filter plates 13 near the water outlet 7. The filtration aperture of the filter layer 14 is smaller than that of the second filter plates 9. The first filter plates 8, second filter plates 9, mesh plates 13, and filter layers 14 are all provided to form a multi-layer filtration effect. The implementation principle is based on existing technology and will not be elaborated in this specification.

[0041] A method for treating municipal wastewater, using the above-mentioned municipal wastewater treatment and recovery equipment, comprises the following steps:

[0042] S1. Collecting municipal wastewater and sewage, quantitatively collecting wastewater and sewage, and transferring them to the water reservoir where the municipal wastewater treatment and recovery equipment is located. The height of the water reservoir is higher than the installation height of the municipal wastewater treatment and recovery equipment, and the water reservoir is connected through a pipe with an electric valve to control the feeding;

[0043] In this step, the height of the water reservoir is higher than the installation height of the recovery equipment in order to facilitate material unloading.

[0044] S2, pre-treating the municipal wastewater, including microbial inoculation, by detachably installing a microbial module at the bottom of the recovery box 1 of the municipal wastewater treatment and recovery equipment;

[0045] In this step, itchy microorganisms are generally selected, which can achieve a better decomposition effect of organic matter under the premise of sufficient oxygen; the itchy microorganisms are integrated into the module for easy installation and use, that is, the microbial module, which is detachable so that the module is easy to update and use.

[0046] S3, urban wastewater recycling treatment, the sewage through the urban wastewater treatment and recycling equipment, first through the primary filter layer 10 filtered, the filtered sewage enters the middle part of the recovery box 1, and the filtered impurities are retained in the primary filter part below the primary filter layer 10, at this time the second cylinder 4 is extended, the discharge plate 20 pushes the impurities to one side of the primary filter part, at this time the impurities are precipitated into the interior of the sewage box 3 through the leakage groove 24; at this time the sewage continues to pass through the urban wastewater treatment and recycling equipment for treatment, after a period of time the primary filter part accumulates impurities, the second cylinder 4 runs to a contracted state, at this time the impurities in the primary filter part are pushed to the other side by the discharge plate 20, and are precipitated into the sewage box 3 in the leakage groove 24 on the other side; the sewage in the middle part continues to be filtered in the recovery box 1 and is finally discharged; in the sewage box 3, the sewage discharge structure pushes the impurities to one side of the sewage box 3 for accumulation, and is cleaned regularly.

[0047] S4. The impurities in the sewage box 3 are taken out and buried or recycled.

[0048] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.

Claims

1. A municipal wastewater treatment and recovery equipment, characterized in that: The invention comprises a recovery box (1) and a sewage box (3), wherein the front of the recovery box (1) is provided with a water inlet (6) and a water outlet (7), and the middle of the recovery box (1) is provided with a partition (15), a baffle (16) and a primary filter plate (17), wherein the baffle (16) and the primary filter plate (17) are fixedly connected to form a rectangular plate, and the rectangular plate and the partition (15) are fixedly connected to each other perpendicularly to form a T-shaped symmetrical plate body, and the T-shaped symmetrical plate body divides the inner cavity of the recovery box (1) into a primary filter part, a middle part and an outlet part in sequence; A primary filter portion is connected to the water inlet (6), and a primary filter layer (10) is obliquely installed between the two ends of the inlet and outlet of the primary filter portion. Elastic members are provided at the four corners of the bottom of the two ends of the primary filter layer (10), and the bottom of the elastic member is fixed to the bottom surface of the recovery box (1). The four side surfaces of the primary filter layer (10) are respectively arranged on each wall surface of the primary filter portion. The primary filter layer (10) includes a primary filter screen (11), and the primary filter layer (10) is fixedly installed with a plurality of rubber rods distributed at equal distances within the range of the primary filter screen (11). The plurality of rubber rods form a rubber rod group (21). A discharge plate (20) is provided just below the primary filter layer (10), and a second cylinder (4) is provided at one end of the discharge plate (20). The second cylinder (4) is installed on the outer wall of the recovery box (1), and the second cylinder (4) includes a second cylinder piston rod (19). The second cylinder piston rod (19) passes through the wall surface of the recovery box (1) and is fixedly connected to the discharge plate (20). When the second cylinder (4) is in the extended and contracted states, the outer and inner sides of the corresponding discharge plate (20) are respectively provided with leakage grooves (24), and the leakage grooves (24) run through the entire recovery box (1). In these two states, a rectangular space is formed with the discharge plate (20) and the partition plate (15) parallel thereto or the side wall of the recovery box (1) as two opposite surfaces. When the second cylinder (4) is extended or contracted, the discharge plate (20) pushes the impurities accumulated in the primary filter part into the rectangular space, and the impurities settle to the leakage grooves (24) due to gravity and are discharged; The cross section of the discharge plate (20) is a right-angled trapezoid, and its oblique side faces upward corresponding to the slope of the primary filter layer (10). A group of extrusion columns (26) are provided on the top inclined surface of the discharge plate (20), and the extrusion columns (26) are parallel to the direction of the rubber rod group (21). The elastic member acts on the primary filter layer (10) downward, and the bottom surface of the discharge plate (20) is slidably arranged on the bottom surface of the recovery box (1). The primary filter layer (10) elastically squeezes the extrusion columns (26) of the discharge plate (20) under the action of the elastic member. When the second cylinder (4) is extended or contracted, multiple extrusion columns in a group of extrusion columns (26) will act on the rubber rod group (21) on the primary filter layer (10) in turn, forming a setback interaction, thereby achieving scraping of impurities on the bottom surface of the primary filter layer (10); This abrupt interaction is generated by the action of each squeezing column (26) on the rubber rod group (21). When the first squeezing column (26) squeezes the first rubber rod it contacts, the primary filter layer (10) moves slightly upward. When the first squeezing column (26) enters between the first and second rubber rods, the primary filter layer (10) is slightly reset downward. When the second squeezing column (26) squeezes the first rubber rod, the primary filter layer (10) moves slightly upward again. This reciprocating process forms the above-mentioned abrupt interaction. A sewage box (3) is provided at the bottom of the recovery box (1), and the drain groove (24) is connected to the sewage box (3). After the impurities are settled, they are transferred from the primary filter part to the sewage box (3); a sewage discharge structure is provided inside the sewage box (3) for sewage discharge operation; The elastic member includes four telescopic rods (23), which are divided into two groups and fixedly installed between the primary filter layer (10) and the bottom surface of the recovery box (1) respectively. The lengths of the two groups of telescopic rods respectively correspond to the lengths of the two sides of the primary filter layer (10) from the bottom surface of the recovery box (1) when the primary filter layer (10) is installed tilted. The outside of each telescopic rod (23) is provided with a spring (22) of corresponding length.

2. The urban wastewater treatment and recycling equipment according to claim 1, characterized in that: The sewage discharge structure includes a sewage discharge push plate (28) that is in contact with the inner wall of the sewage discharge box (3), a through groove (27) is formed on the sewage discharge push plate (28), a blocking net is provided on the through groove (27), and a first cylinder (2) is provided on one side of the sewage discharge push plate (28), and the first cylinder (2) is fixedly mounted on the outer wall of the sewage discharge box (3).

3. The urban wastewater treatment and recycling equipment according to claim 2, characterized in that: A sewage outlet (5) is provided at one end of the sewage box (3) away from the first cylinder (2), and an electric valve is provided in the sewage outlet (5).

4. The urban wastewater treatment and recycling equipment according to claim 1, characterized in that: Two first filter plates (8) are symmetrically provided on both sides of the middle portion of the outer end of the rectangular plate formed by the baffle (16) and the primary filter layer filter plate (17). The first filter plate (8) divides the middle portion into three functional areas. An oil-absorbing cotton layer is provided in the middle and upper layers of the area between the two first filter plates (8).

5. The urban wastewater treatment and recycling equipment according to claim 4, characterized in that: A plurality of second filter plates (9) are provided in the two functional areas at the outer ends of the two first filter plates (8), and the filter apertures of the second filter plates (9) are smaller than the filter apertures of the primary filter layer filter plates (17).

6. The urban wastewater treatment and recycling equipment according to claim 5, characterized in that: The outlet portion is provided with three mesh filter plates (13) distributed at equal distances, and a filter layer (14) is provided on one side of the two mesh filter plates (13) close to the water outlet (7), wherein the filter aperture of the filter layer (14) is smaller than the filter aperture of the second filter plate (9).

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