Sewage treatment system

Abstract

The sewage treatment system comprises a flow control pool, a treatment pool, a discharge pool and a sludge pool, a pump body is arranged in the flow pool, the output end of the pump body is communicated with the treatment pool, a sludge pump is arranged in the treatment pool, the output end of the sludge pump is communicated with the sludge pool, and the treatment pool is communicated with the discharge pool through a supernatant discharge module; and an aeration frame is erected between the guide columns in a sliding manner. According to the utility model, the aeration frame is arranged in the treatment tank and can be driven by the winch to move up and down, so that the water flow disturbance in the treatment tank is increased, and the reaction efficiency is improved; the treatment tank is separated into an upper aerobic zone and a lower anoxic zone by combining the biological membrane filter unit at the bottom of the ingress pipe, and the upper aerobic zone and the lower anoxic zone are repeatedly moved while the biological membrane filter unit ascends and descends by combining the winch, so that the contact area of the biological membrane filter unit at the boundary between the upper aerobic zone and the lower anoxic zone is increased; the reaction time in unit time is prolonged, so that the nitrogen and phosphorus treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, and more specifically, to a sewage treatment system. Background Art

[0002] Generally speaking, in biological sewage and wastewater treatment methods, nitrogen and phosphorus are used as essential nutrients for protein and nucleic acid synthesis to promote the activity and proliferation of microorganisms. However, if the water contains a large amount of nutrients such as nitrogen and phosphorus, eutrophication caused by the rapid growth of autotrophic organisms such as algae may inhibit the growth of algae phytoplankton in the water, thereby promoting water pollution. Therefore, an advanced biological treatment process that can effectively remove nitrogen and phosphorus has been introduced into sewage treatment.

[0003] Now there are very good conditions for the wastewater treatment process for nitrogen and phosphorus removal, that is, the anoxic-anaerobic-aerobic process treatment process. In the anoxic process, denitrifying bacteria convert the nitrate brought in by the reflux into nitrogen gas through biological denitrification and release it into the atmosphere, thereby achieving the purpose of denitrification. In the anaerobic process, after the polyphosphate bacteria release phosphorus, they absorb excess phosphorus in the aerobic section and remove the phosphorus by discharging residual sludge. In the aerobic section, nitrifying bacteria convert the ammonia nitrogen in the sewage into nitrate through biological nitrification, thereby achieving the removal of nitrogen and phosphorus in the sewage.

[0004] When the existing sewage denitrification and phosphorus removal equipment is in use, the efficiency of nitrogen and phosphorus purification is relatively low, resulting in inadequate sewage purification. Utility Model Content

[0005] The utility model provides a sewage treatment system, which can improve the denitrification and phosphorus removal efficiency, so as to solve the problem of low denitrification and phosphorus removal efficiency in existing sewage.

[0006] According to one aspect of the utility model, a sewage treatment system is provided, including a flow control tank, a treatment tank, a discharge tank and a sludge tank, the flow control tank having a built-in pump body, the output end of the pump body being connected to the treatment tank, the treatment tank having a built-in sludge pump, the output end of the sludge pump being connected to the sludge tank, and the treatment tank being connected to the discharge tank via a supernatant discharge module; guide columns are installed in the treatment tank, aeration racks are slidably mounted between the guide columns, and a winch is provided on the treatment tank, the output end of the winch is connected to the aeration rack.

[0007] Preferably, based on the above scheme, the aeration rack comprises an introduction pipe and an aeration tube, the aeration tube is arranged at intervals at the bottom of the introduction pipe, the aeration tube is connected to the introduction pipe, and an aeration head is arranged on the aeration tube.

[0008] Preferably, based on the above scheme, the aeration head comprises an aeration protrusion, a conical cover body and a connecting pipe, the cover body is detachably mounted on the aeration pipe through the connecting pipe, the cover body is provided with a mounting hole, and the aeration protrusion is mounted in the mounting hole.

[0009] Preferably, based on the above solution, a biofilm filtration unit is further installed at the bottom of the introduction pipe, and the biofilm filtration unit is arranged near the bottom of the treatment tank.

[0010] Preferably, based on the above solution, the aeration pipe is further provided at the lower part of the biofilm filtration unit.

[0011] Preferably, based on the above scheme, a lower agitator is installed at the bottom of the treatment tank, and an upper agitator is installed at the top of the treatment tank.

[0012] The utility model provides a sewage treatment system, in which an aeration frame is arranged in a treatment pool, and the aeration frame can be driven to move up and down by a winch to increase the disturbance of water flow in the treatment pool and improve the reaction efficiency. At the same time, in combination with a biofilm filtration unit at the bottom of an inlet pipe, the treatment pool is separated into an upper aerobic zone and a lower anoxic zone, and in combination with the function of the winch, the biofilm filtration unit is made to rise and fall while repeatedly moving the upper aerobic zone and the lower anoxic zone, thereby increasing the contact area of ​​the biofilm filtration unit at the boundary between the upper aerobic zone and the lower anoxic zone, prolonging and increasing the reaction time per unit time, and thus improving the nitrogen and phosphorus treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a partial schematic diagram of the aeration pipe in the utility model.

[0016] Figure 3 It is a structural diagram of the supernatant discharge module in the utility model.

[0017] Description of Figure Numbers:

[0018] Flow control tank 1, pump body 11, treatment tank 2, sludge pump 21, guide column 22, aeration frame 23, winch 24, inlet pipe 231, aeration pipe 232, aeration head 234, aeration protrusion 235, cover body 236, connecting pipe 237, mounting hole 238, biofilm filtration unit 239, discharge tank 3, sludge tank 4, supernatant discharge module 5, lower agitator 51, upper agitator 52, discharge pipe 53, connecting pipe 54, rotating pipe 55, branch inlet pipe 56, buoyancy unit 57. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0021] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0022] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0023] In the embodiments shown in the drawings, the directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the positions of the components changes, the directions also change accordingly.

[0024] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0026] See also Figure 1 , and combined with Figure 2 As shown, the sewage treatment system of the utility model includes a flow control tank 1, a treatment tank 2, a discharge tank 3 and a sludge tank 4. The flow control tank has a built-in pump body 11, and the output end of the pump body 11 is connected to the treatment tank 2. The treatment tank 2 has a built-in sludge pump 21, and the output end of the sludge pump 21 is connected to the sludge tank 4. The treatment tank 2 is connected to the discharge tank 3 through a supernatant discharge module 5. Guide columns 22 are installed in the treatment tank 2, and an aeration frame 23 is slidably mounted between the guide columns 22. A winch 24 is provided on the treatment tank 2, and the output end of the winch 24 is connected to the aeration frame 23.

[0027] Specifically, the aeration rack 23 includes an inlet pipe 231 and an aeration pipe 232. The aeration pipe 232 is arranged at an interval at the bottom of the inlet pipe 231, and the aeration pipe 232 is connected to the inlet pipe 231, and an aeration head 234 is arranged on the aeration pipe 232. A biofilm filtration unit 239 is also installed at the bottom of the inlet pipe 231. The biofilm filtration unit 239 is arranged near the bottom of the treatment tank 2, and divides the treatment space in the treatment tank 2 into an aerobic zone and an anaerobic zone in the vertical direction. The biofilm filtration unit 239 is composed of a contact filter medium layer for attaching microorganisms and forming biofilms.

[0028] The flow control tank 1 is used to carry raw sewage, and a storage space for storing sewage is provided therein. In the storage space of the flow control tank 1, an agitator for stirring sewage and a water level sensor for detecting the water level in the storage space can be installed respectively.

[0029] During treatment, the sewage supply unit stores the sewage in the flow control tank 1, and uses the agitator in the flow control tank 1 to stir and mix the sewage to ensure the uniformity of the sewage. Then, the sewage is transferred to the treatment tank 2 through the pump body 11. In the treatment tank 2, the biofilm filtration unit 239 on the aeration rack 23 is used, combined with the function of the winch 24, to drive the aeration rack 23 and the biofilm filtration unit 239 to move downward in the anaerobic zone and the aerobic zone. The decomposition of organic matter, removal of organic matter, release of phosphorus and denitrification reaction are carried out in the anaerobic zone, and the denitrification reaction is carried out in the aerobic zone. In the reaction step, the biofilm filtration unit 239 can be raised and lowered within the set range by the winch 24 to improve the reaction efficiency.

[0030] The treated supernatant can be discharged into the discharge tank 3 through the supernatant discharge module 5 , and the sludge settled at the bottom of the treatment tank 2 can be transferred to the sludge tank 4 through the sludge pump 21 .

[0031] Please continue reading Figure 2 As shown, the aeration rack 23 of the utility model includes an inlet pipe 231 and an aeration pipe 232. The aeration pipe 232 is arranged at an interval at the bottom of the inlet pipe 231, and the two are arranged in a cross shape. The aeration pipe 232 is connected to the inlet pipe 231, and an aeration head 234 is arranged on the aeration pipe 232. The aeration head 234 includes an aeration protrusion 235, a conical cover body 236 and a connecting pipe 237. The cover body 236 is detachably mounted on the aeration pipe 232 through the connecting pipe 237. A mounting hole 238 is arranged on the cover body 236. The aeration protrusion 235 is installed in the mounting hole 238, and an aeration pipe 232 is also arranged at the lower part of the biofilm filtration unit 239. When the inlet pipe 231 is connected to the gas source, the gas is introduced, and the gas is introduced into the aeration head 234 through the aeration pipe 232, and acts on the sewage through the aeration head 234 to improve the removal efficiency of phosphorus and organic matter in the aerobic zone 1.

[0032] The upper clear water discharge unit of the utility model includes a discharge pipe 53, a connecting pipe 54, a rotating pipe 55, a branch inlet pipe 56 and a buoyancy unit 57. The discharge pipe 53 is arranged on the partition between the treatment tank 2 and the discharge tank 3. The discharge pipe 53 is connected to the rotating pipe 55 through the connecting pipe 54. The rotating pipe 55 is connected to the buoyancy unit 57 through the branch inlet pipe 56. The connecting pipe 54 is a flexible hollow pipe, and the buoyancy unit 57 is polystyrene or foam. When in use, the buoyancy unit 57 can automatically adjust the angle of the connecting pipe 54 according to the water level to ensure that the branch inlet pipe 56 is always on the surface of the upper clear water, ensuring that the upper clear water is discharged. For the specific structure, please refer to Figure 3 shown.

[0033] Preferably, the bottom of the treatment tank 2 of the present invention is provided with a lower agitator 51, and the upper part of the treatment tank 2 is provided with an upper agitator 52, which is installed in the anoxic zone below the biofilm filtration unit 239, and is used to stir the sewage in the anoxic zone. The lower agitator 51 can be configured to stir the sewage and sludge by forming a vortex from the lower end of the biofilm filtration unit 239 to the bottom of the reaction tank when the sewage flows into the lower part of the biofilm filtration unit 239; and the upper agitator 52 is used for an underwater stirring pump to stir the sewage and sludge.

[0034] A sewage treatment system of the utility model is provided with an aeration rack 23 in a treatment pool 2, and the aeration rack 23 can be driven to move up and down by a winch 24 to increase the disturbance of water flow in the treatment pool 2 and improve the reaction efficiency. At the same time, in combination with a biofilm filtration unit 239 at the bottom of an inlet pipe 231, the treatment pool 2 is separated into an upper aerobic zone and a lower anoxic zone. In combination with the function of the winch 24, the biofilm filtration unit 239 is made to rise and fall while repeatedly moving the upper aerobic zone and the lower anoxic zone, thereby increasing the contact area of ​​the biofilm filtration unit 239 at the boundary between the upper aerobic zone and the lower anoxic zone, prolonging and increasing the reaction time per unit time, and thus improving the nitrogen and phosphorus treatment efficiency.

[0035] Finally, the method of this application is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A sewage treatment system, characterized in that: It includes a flow control tank, a treatment tank, a discharge tank and a sludge tank. The flow control tank has a built-in pump body, and the output end of the pump body is connected to the treatment tank. The treatment tank has a built-in sludge pump, and the output end of the sludge pump is connected to the sludge tank. The treatment tank is connected to the discharge tank through a supernatant discharge module. Guide columns are installed in the treatment tank, and aeration frames are slidably mounted between the guide columns. A winch is arranged on the treatment tank, and the output end of the winch is connected to the aeration frame.

2. The sewage treatment system according to claim 1, characterized in that: The aeration rack comprises an introduction pipe and an aeration pipe, wherein the aeration pipe is arranged at intervals at the bottom of the introduction pipe, the aeration pipe is communicated with the introduction pipe, and an aeration head is arranged on the aeration pipe.

3. The sewage treatment system according to claim 2, characterized in that: The aeration head comprises an aeration protrusion, a conical cover body and a connecting pipe. The cover body is detachably mounted on the aeration pipe through the connecting pipe. A mounting hole is arranged on the cover body, and the aeration protrusion is mounted in the mounting hole.

4. The sewage treatment system according to claim 2, characterized in that: A biofilm filtration unit is also installed at the bottom of the introduction pipe, and the biofilm filtration unit is arranged near the bottom of the treatment tank.

5. The sewage treatment system according to claim 4, characterized in that: An aeration pipe is also arranged at the lower part of the biofilm filtration unit.

6. The sewage treatment system according to claim 1, characterized in that: A lower agitator is installed at the bottom of the treatment tank, and an upper agitator is installed at the upper part of the treatment tank.

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