Sewage treatment equipment integrating sludge storage and filtration

Abstract

The utility model discloses sewage treatment equipment integrating sludge storage and filtration, which is characterized in that a clarification tank is arranged at the front ends of an aerobic tank and an anoxic tank, and a sedimentation tank and a filter tank are arranged at the rear end of the anoxic tank, so that sewage enters the clarification tank to settle suspended particles and sludge to the bottom before biochemical treatment; the sewage is subjected to primary sedimentation and then enters the aerobic tank and the anoxic tank to be subjected to biochemical treatment, so that the load of sewage treatment equipment is reduced, the sewage treatment effect is improved, further, the sewage subjected to biochemical treatment enters the sedimentation tank, suspended particles and sludge in the sewage are settled to the bottom of the sedimentation tank, and the sewage treatment efficiency is improved. The sewage treated by the sedimentation tank enters the filter tank and is conveyed to the clarification tank through the return pipeline for temporary storage and secondary sedimentation, so that a sludge tank does not need to be additionally built for storing sludge, the construction cost of the sewage treatment equipment is reduced, the construction period of the sewage treatment equipment is shortened, and meanwhile, the sewage treated by the sedimentation tank enters the filter tank and is adsorbed and dephosphorized by adopting an adsorption filter material in the filter tank. The processing cost and the operation and maintenance cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to sewage treatment equipment integrating mud storage and filtration. Background Art

[0002] Existing sewage treatment equipment usually directly performs biochemical treatment on sewage, such as an integrated sewage treatment equipment disclosed in a Chinese patent with announcement number CN 218232054U, which includes a steel plate box, and a plurality of partitions inside the steel plate box divide the internal space to form an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank and an equipment tank. After the sewage enters the equipment, it is directly biochemically treated through the anaerobic tank, the anoxic tank and the aerobic tank.

[0003] However, rural domestic sewage and construction sewage usually contain suspended sludge. Direct biochemical treatment of sewage containing suspended sludge will increase the treatment load of sewage treatment equipment, increase operation and maintenance costs, and affect the treatment effect.

[0004] At the same time, existing sewage treatment equipment usually requires the construction of a sludge pool to store suspended sludge in the sludge pool, resulting in a long construction cost and cycle of the sewage treatment equipment. In addition, existing sewage treatment equipment usually uses the method of adding chemicals to remove phosphorus from sewage, which has a high treatment cost. Phosphorus removal by chemicals will cause sediment to appear in the water body. Long-term use may also cause secondary pollution in the sewage treatment equipment, which not only increases the equipment operation and maintenance costs, but also affects the chemical substances released into the water environment.

[0005] Therefore, there is an urgent need in this field for a sewage treatment equipment with good sewage treatment effect and low operation and maintenance cost. Utility Model Content

[0006] In view of the defects of the prior art, the object of the present invention is to provide a sewage treatment equipment integrating sludge storage and filtration with low operation and maintenance cost and good sewage treatment effect.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a sewage treatment device integrating sludge storage and filtration, wherein the sewage treatment device is provided with an anoxic tank and an aerobic tank which are arranged adjacently and connected, and the sewage treatment device also includes

[0008] A clarification tank is arranged at the front end of the anoxic tank and is connected to the upper area of ​​the anoxic tank. The clarification tank is provided with a water inlet pipe connected to the outside of the sewage treatment equipment.

[0009] A sedimentation tank is arranged at the rear end of the aerobic tank and is connected to the upper area of ​​the aerobic tank. The sedimentation tank is provided with a return pipeline connected to the clarification tank, and

[0010] A filter tank is arranged at the rear end of the sedimentation tank and communicated with the sedimentation tank. Adsorption filter material is arranged in the filter tank. An outlet pipe communicating with the outside of the sewage treatment equipment is also arranged on the filter tank.

[0011] Furthermore, it also includes an equipment room arranged at the rear end of the filter tank, and the water outlet pipe passes through the filter tank and the equipment room and is arranged outside the equipment room.

[0012] Furthermore, a first water hole is provided in the upper area of ​​the first end surface of the clarification tank cooperating with the anoxic tank, a second water hole is provided in the upper area of ​​the second end surface of the anoxic tank cooperating with the aerobic tank, and a third water hole is provided in the upper area of ​​the third end surface of the aerobic tank cooperating with the sedimentation tank.

[0013] Furthermore, the first water through hole, the second water through hole and the third water through hole are configured to have the same structure and are parallel and symmetrical to each other.

[0014] Furthermore, the water inlet pipe is arranged in the upper area of ​​the outer end surface of the clarifier, and a water inlet guide tube is provided on the inner wall of the outer end surface. The water inlet guide tube covers the water inlet pipe and extends to the lower area of ​​the outer end surface.

[0015] Furthermore, the inlet end of the reflux pipeline is arranged in the lower area of ​​the sedimentation tank, and the outlet end passes through the aerobic tank and the anoxic tank and is arranged in the middle area of ​​the clarification tank.

[0016] Furthermore, the bottom of the sedimentation tank is provided with sedimentation plates distributed at an angle.

[0017] Furthermore, the fourth end surface of the sedimentation tank and the filtration tank is configured as an overflow weir.

[0018] Furthermore, the adsorption filter material is composed of porous phosphorus removal adsorption filter material.

[0019] The utility model provides an integrated sludge storage and filtration sewage treatment equipment, wherein a clarification tank is arranged at the front end of an aerobic tank and an anoxic tank, and a sedimentation tank and a filtration tank are arranged at the rear end of the anoxic tank, so that the sewage enters the clarification tank first before being biochemically treated, and the suspended particles and sludge are precipitated to the bottom of the clarification tank through sedimentation, so that the sewage is first precipitated and then enters the aerobic tank and the anoxic tank for biochemical treatment, so as to reduce the load of the sewage treatment equipment and improve the sewage treatment effect.

[0020] Furthermore, the sewage after biochemical treatment enters the sedimentation tank, and the suspended particles and sludge in the sewage are settled to the bottom of the sedimentation tank by gravity sedimentation, and are transported to the clarification tank through the return pipeline for temporary storage and secondary sedimentation, so that there is no need to build a sludge tank to store sludge, reducing the construction cost and construction period of the sewage treatment equipment.

[0021] At the same time, the sewage treated in the sedimentation tank enters the filtration tank, where adsorption filter materials are used to adsorb and remove phosphorus from the sewage, thereby removing phosphorus and residual suspended matter in the sewage, thereby improving the sewage treatment effect, preventing secondary pollution in the sewage treatment equipment, and reducing treatment costs and operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementations.

[0023] Figure 1 This is a schematic diagram of the overall structure of the sewage treatment equipment with integrated sludge storage and filtration provided by the utility model;

[0024] Figure 2 It is a schematic diagram of the structure of the water hole and the overflow weir in the utility model;

[0025] Reference numerals:

[0026] 1. Clarifying tank; 11. Water inlet pipe; 12. First end surface; 13. First water hole; 14. External end surface; 15. Water inlet guide tube;

[0027] 2. Anoxic pool; 21. Second end surface; 22. Second water hole;

[0028] 3. Aerobic pool; 31. Third end surface; 32. Third water hole;

[0029] 4. Sedimentation tank; 41. Return pipe; 411. Inlet end; 412. Outlet end; 42. First sedimentation plate; 43. Second sedimentation plate; 44. Fourth end face; 45. Overflow weir;

[0030] 5. Filter tank; 51. Adsorption filter material; 52. Water outlet pipe;

[0031] 6. Equipment room; 7. Roof. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0033] See also Figure 1 , which shows an example of a sewage treatment device with integrated sludge storage and filtration provided by the utility model.

[0034] As can be seen from the figure, the sewage treatment equipment with integrated sludge storage and filtration in this example is mainly composed of a clarification tank 1, an anoxic tank 2, an aerobic tank 3, a sedimentation tank 4, a filtration tank 5 and an equipment room 6 connected and coordinated.

[0035] The anoxic tank 2 and the aerobic tank 3 are arranged adjacent to each other and in parallel. The clarifier 1 is arranged at the front end of the anoxic tank 2 and is connected to the upper area of ​​the anoxic tank 2. The clarifier 1 is also provided with an inlet pipe 11 connected to the outside of the sewage treatment equipment, so that the sewage enters the clarifier 1 through the inlet pipe 11. Before the biochemical treatment, the suspended particles and sludge are first precipitated in the clarifier 1 to reduce the load of the sewage treatment equipment and improve the sewage treatment effect; the sedimentation tank 4 is arranged at the rear end of the aerobic tank 3 and is connected to the upper area of ​​the aerobic tank 3. The sedimentation tank 4 is also provided with a return pipe 41 connected to the clarifier 1, so that the sewage after biochemical treatment is secondary precipitated in the sedimentation tank 4, and the suspended particles and sludge produced by the precipitation are returned to the clarifier 1 through the return pipe 41 for temporary storage, so that there is no need to build a separate sludge tank, and the sedimentation is reduced. The construction cost and construction period of the low sewage treatment equipment are reduced; the filter tank 5 is arranged at the rear end of the sedimentation tank 4 and is connected with the sedimentation tank 3. The filter tank 5 is provided with an adsorption filter material 51. The filter tank 5 is also provided with an outlet pipe 52 connected to the outside of the sewage treatment equipment, so that the sewage after sedimentation can remove phosphorus and residual suspended matter through the adsorption filter material 51 in the filter tank 5, and be discharged through the outlet pipe 52, thereby improving the sewage treatment effect, and will not generate secondary pollution in the sewage treatment equipment, reducing the treatment cost and operation and maintenance cost; the equipment room 6 is arranged at the rear end of the filter tank 5 for storing power supply motors and other equipment, and the outlet pipe 52 passes through the filter tank 5 and the equipment room 6 and is arranged outside the sewage treatment device 1, so that the sedimentation, biochemical treatment, sludge storage and filtration of the sewage are integrated in the sewage treatment equipment to improve the treatment effect and efficiency.

[0036] Specifically, a first water hole 13 is provided in the upper area of ​​the first end surface 12 where the clarification tank 1 cooperates with the anoxic tank 2, a second water hole 22 is provided in the upper area of ​​the second end surface 21 where the anoxic tank 2 cooperates with the aerobic tank 3, and a third water hole 32 is provided in the upper area of ​​the third end surface 31 where the aerobic tank 3 cooperates with the sedimentation tank 4, so that the sewage in the clarification tank 1 can pass through the first water hole 13, the second water hole 22 and the third water hole 32 respectively and enter the anoxic tank 2, the aerobic tank 3 and the sedimentation tank 4 in turn for treatment.

[0037] Furthermore, the first water hole 13, the second water hole 22 and the third water hole 32 are configured to have the same structure and are parallel and symmetrical to each other. Taking the first water hole 13 as an example, in this example, the first water hole 13 is preferably arranged on the first end surface 12 at a distance of 7200mm from the top plate of the sewage treatment equipment, and is configured as a 300×200mm square water hole, so that the first water hole 13, the second water hole 22 and the third water hole 32 are square water holes that are parallel and symmetrical to each other, thereby ensuring that the flow of the flowing sewage is uniform, reducing agitation, and improving the sedimentation effect of the sewage. At the same time, the square water outlet is easy to clean and maintain, and because the four corners are flush, the retention of suspended particles and sludge can be reduced.

[0038] In some embodiments, the first water hole 13, the second water hole 22 and the third water hole 32 may also be configured as circular holes to increase the overflow width of the sewage and ensure the fluidity and stability of the sewage.

[0039] In order to allow sewage to enter the clarifier 1 for stable sedimentation, reduce the load for subsequent biochemical treatment, and improve the sewage treatment effect, the water inlet pipe 11 is arranged in the upper area of ​​the outer end surface 14 of the clarifier 1, and the inner wall of the outer end surface 14 is provided with an inlet guide tube 15 for guiding sewage.

[0040] Specifically, the water inlet guide tube 15 covers the water inlet pipe 11 and extends to the lower area of ​​the outer end surface 14, so that when the sewage enters the clarification tank 1 from the water inlet pipe 11, the water inlet guide tube 15 can optimize the water flow path of the sewage and guide the sewage directly into the bottom of the clarification tank 1, thereby effectively promoting the sedimentation of suspended particles and sludge in the sewage.

[0041] Furthermore, after the sewage preferably stays in the clarifier tank 1 for 1 to 2 hours, a large amount of suspended particles and sludge settle to the bottom of the clarifier tank 1 under the action of sedimentation, so as to perform the first sedimentation and purification of the sewage, so that the treated sewage in the upper area of ​​the clarifier tank 1 enters the anoxic tank 2 through the first water hole 13 in the upper area of ​​the first end face 12 for biochemical treatment.

[0042] Thus, the sewage after the first sedimentation and purification in the clarification tank 1 enters the anoxic tank 2 through the first water hole 13. In the anoxic tank 2, the sewage uses the action of anaerobic microorganisms to hydrolyze, acidify and methanize the organic matter in the sewage, remove the organic matter in the wastewater, such as ammonia nitrogen, COD, total nitrogen, etc., and improve the biodegradability of the sewage, which is beneficial to the subsequent aerobic treatment.

[0043] Furthermore, the sewage treated in the anoxic tank 2 enters the aerobic tank 3 through the second water passage hole 22 on the second end surface 21, and the sewage is aerobically treated to further remove organic matter in the sewage.

[0044] Specifically, in the aerobic pool 3, aerobic microorganisms decompose organic matter in the sewage into carbon dioxide and water through aerobic respiration, thereby removing organic pollutants in the sewage.

[0045] Therefore, after the sewage is initially precipitated and purified in the clarification tank 1, it is biochemically treated in the anoxic tank 2 and the aerobic tank 3 to remove organic pollutants, and then enters the sedimentation tank 4 through the third water hole 32 on the third end face 31 of the aerobic tank 3. In the sedimentation tank 4, the suspended particles and sludge in the sewage are settled to the bottom of the sedimentation tank 4 by gravity sedimentation, thereby achieving pollutant separation.

[0046] Specifically, a first sedimentation plate 42 and a second sedimentation plate 43 are provided at the bottom of the sedimentation tank 4, which are distributed at an angle. The first sedimentation plate 42 and the second sedimentation plate 43 are preferably distributed in a V-shape to increase the sedimentation area in the sedimentation tank 4, so that the sewage in the sedimentation tank 4 is subjected to the action of gravity, and the suspended particles and sludge are settled to the bottom of the sedimentation tank 4, and a sludge layer is formed on the first sedimentation plate 42 and the second sedimentation plate 43, while the liquid floats to the top of the sedimentation tank 4. Due to the inclination of the first sedimentation plate 42 and the second sedimentation plate 43, the sewage will produce a rotating flow during the flow, which helps the suspended particles to slide along the first sedimentation plate 42 and the second sedimentation plate 43 to the bottom of the sedimentation tank 4, thereby promoting the solid-liquid separation in the sewage and effectively performing secondary sedimentation treatment on the sewage.

[0047] In existing sewage treatment equipment, the sludge generated in the sedimentation tank 4 is usually collected regularly and landfilled in a civil sludge tank. In order to avoid the construction of the sludge tank and reduce the operation and maintenance cost of the sewage treatment equipment, a return pipe 41 is provided in the sedimentation tank 4 and is also connected to the clarification tank 1, so that the sludge can be transported to the clarification tank 1 through the return pipe 41 for temporary storage.

[0048] Furthermore, the inlet end 411 of the return pipe 41 is arranged in the sedimentation tank 4, and the outlet end 412 is arranged in the clarification tank 1 through the aerobic tank 3 and the anoxic tank 2. Specifically, the inlet end 411 is arranged in the lower area of ​​the sedimentation tank 4 and is placed above the first sedimentation plate 42 and the second sedimentation plate 43, so that the sludge on the first sedimentation plate 42 and the second sedimentation plate 43 can enter the return pipe 41 through the inlet end 411, and the outlet end 412 is placed in the middle area of ​​the clarification tank 1, so that when the sludge enters the clarification tank 1 through the outlet end 412, it can fall on the sludge accumulated in the clarification tank 1, and will not be output from the bottom of the sludge accumulated in the clarification tank 1, thereby ensuring the sedimentation stability of the clarification tank 1.

[0049] Here, the sedimentation tank 4 may be provided with an air lift reflux device or a reflux pump in the prior art to transport the sludge in the sedimentation tank 4 back to the clarification tank 1 for temporary storage.

[0050] Furthermore, after the sludge in the sedimentation tank 4 is transported back to the clarification tank 1, it is precipitated together with the newly entered sewage in the clarification tank 1, and the precipitated sludge is temporarily stored in the clarification tank 1. After the whole process of sewage treatment is completed, the sludge in the clarification tank 1 is sucked out by a sewage suction truck, thereby eliminating the construction of the sludge tank and reducing the construction cost and construction period of the sewage treatment equipment.

[0051] Therefore, the sewage first passes through the clarification tank 1 for initial sedimentation and purification, then passes through the anoxic tank 2 and the aerobic tank 3 for biochemical treatment to remove organic pollutants, and undergoes secondary sedimentation in the sedimentation tank 4. In order to remove phosphorus from the sewage so that the sewage meets the discharge requirements, a filter tank 5 is provided at the rear end of the sedimentation tank 4, and the fourth end face 44 of the sedimentation tank 4 and the filter tank 5 is configured as an overflow weir 45, so that the sewage passes through the overflow weir 45 and evenly enters the filter tank 5.

[0052] Furthermore, in this example, the overflow weir 45 is preferably composed of a right-angle overflow weir to increase the overflow front edge length and effectively improve the flow capacity so that the sewage can flow evenly distributed through the overflow weir 45 into the filter tank 5. The sewage flow rate can also be roughly estimated by checking the weir mouth height of the overflow weir 45.

[0053] Furthermore, the filter tank 5 is provided with an adsorption filter material 51, which is preferably composed of a porous phosphorus removal adsorption filter material to specifically adsorb orthophosphoric acid in the sewage, thereby removing phosphorus and residual suspended matter in the sewage.

[0054] Finally, the sewage after sedimentation, biochemical treatment, secondary sedimentation and filtration is discharged from the sewage treatment equipment through the drain pipe 52 to improve the treatment effect of the sewage.

[0055] The sewage treatment equipment with integrated sludge storage and filtration provided by the present invention adopts a clarification tank 1, an anoxic tank 2, an aerobic tank 3, a sedimentation tank 4 and a filtration tank 5 to cooperate with each other, so as to carry out a first sedimentation of the sewage and then carry out a biochemical treatment, and through a secondary sedimentation, the precipitated sludge is transported to the clarification tank 1 for temporary storage, and finally filtered and dephosphorized, so as to integrate the sludge storage, purification and filtration of the sewage, improve the treatment effect of the sewage, and reduce the operation and maintenance cost of the sewage treatment equipment.

[0056] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A sewage treatment equipment integrating sludge storage and filtration, wherein the sewage treatment equipment is provided with an anoxic tank and an aerobic tank which are arranged adjacently and connected, characterized in that: The sewage treatment equipment also includes A clarification tank is arranged at the front end of the anoxic tank and is connected to the upper area of ​​the anoxic tank. The clarification tank is provided with a water inlet pipe connected to the outside of the sewage treatment equipment. A sedimentation tank is arranged at the rear end of the aerobic tank and is connected to the upper area of ​​the aerobic tank. The sedimentation tank is provided with a return pipeline connected to the clarification tank, and A filter tank is arranged at the rear end of the sedimentation tank and communicated with the sedimentation tank. Adsorption filter material is arranged in the filter tank. An outlet pipe communicating with the outside of the sewage treatment equipment is also arranged on the filter tank.

2. The sewage treatment equipment with integrated sludge storage and filtration according to claim 1 is characterized in that: It also includes an equipment room arranged at the rear end of the filter pool, and the water outlet pipe passes through the filter pool and the equipment room and is arranged outside the equipment room.

3. The sewage treatment equipment with integrated sludge storage and filtration according to claim 1 is characterized in that: A first water hole is provided in the upper area of ​​the first end surface where the clarification tank cooperates with the anoxic tank, a second water hole is provided in the upper area of ​​the second end surface where the anoxic tank cooperates with the aerobic tank, and a third water hole is provided in the upper area of ​​the third end surface where the aerobic tank cooperates with the sedimentation tank.

4. The sewage treatment equipment with integrated sludge storage and filtration according to claim 3 is characterized in that: The first water through hole, the second water through hole and the third water through hole are configured to have the same structure and are parallel and symmetrical to each other.

5. The sewage treatment equipment with integrated sludge storage and filtration according to claim 1 is characterized in that: The water inlet pipe is arranged in the upper area of ​​the outer end surface of the clarifier, and a water inlet guide tube is arranged on the inner wall of the outer end surface. The water inlet guide tube covers the water inlet pipe and extends to the lower area of ​​the outer end surface.

6. The sewage treatment equipment integrating sludge storage and filtration according to claim 1, characterized in that: The inlet end of the reflux pipeline is arranged in the lower area of ​​the sedimentation tank, and the outlet end passes through the aerobic tank and the anoxic tank and is arranged in the middle area of ​​the clarification tank.

7. The sewage treatment equipment integrating sludge storage and filtration according to claim 6 is characterized in that: The bottom of the sedimentation tank is provided with sedimentation plates distributed at an angle.

8. The sewage treatment equipment integrating sludge storage and filtration according to claim 1, characterized in that: The fourth end faces of the sedimentation tank and the filtration tank are configured as overflow weirs.

9. The sewage treatment equipment integrating sludge storage and filtration according to claim 1, characterized in that: The adsorption filter material is composed of porous phosphorus removal adsorption filter material.

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