Novel drainage device for SBR (Sequencing Batch Reactor) equipment
By using lift pumps, check valves and pneumatic valves instead of decanters in SBR equipment, the problems of complex structure, high energy consumption and frequent maintenance of traditional decanters are solved, and the stability of the effluent and the standard emissions are achieved.
Patent Information
- Application Number
- CN202421307142.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The commonly used decanters in existing SBR equipment have complex structures, high energy consumption and high maintenance frequency, which can easily cause mechanical failures and control components failures, resulting in unstable water effluent.
The lifting pump, check valve and pneumatic valve are used instead of the traditional decanter. The water outlet is controlled through the synchronous operation of the pneumatic valve and the lifting pump, which simplifies the equipment structure and reduces the failure rate and maintenance difficulty.
The stability of the effluent and the discharge of the standard are achieved, the equipment failure rate and maintenance costs are reduced, and the equipment structure and debugging process are simplified.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water treatment, in particular to a novel SBR equipment drainage device. Background Art
[0002] SBR is an activated sludge wastewater treatment technology that operates in an intermittent aeration mode, also known as sequencing batch activated sludge process. Different from the traditional activated sludge process, SBR technology uses time division instead of traditional space division. Its biochemical reaction is unstable and the sedimentation method is also different. Ordinary sedimentation tanks are static sedimentation, while SBR uses time control to separate mud and water in a static manner during the sedimentation time.
[0003] The processes involved are:
[0004] Water inlet: starting from the lowest water level in the reaction tank, filling water to the highest water level in the reaction tank and stopping; the time experienced by the water inlet process in one operating cycle is called the water inlet time.
[0005] Aeration: The process of aerating the sewage in the reaction tank. The time spent on aeration during one operating cycle is called the aeration time.
[0006] Sedimentation: refers to the process of standing and settling the reaction tank after aeration is stopped to separate mud and water. The time spent in the sedimentation process in one operation cycle is called sedimentation time.
[0007] Drainage: refers to the process of skimming off the supernatant after sedimentation to the lowest water level in the reaction tank. The time spent in the sedimentation process within one operation cycle is called the sedimentation time.
[0008] Idle: There is no sewage in the pool, only activated sludge separated by sedimentation, part of which is discharged as residual sludge. The time experienced by the idle process in a cycle is called idle time.
[0009] SBR technology has the advantages of simple process, good nitrogen and phosphorus removal effect, control of activated sludge expansion, flexible adjustment, short sedimentation time and good effluent effect.
[0010] Although SBR technology is currently widely used and has obvious advantages, the existing technology usually uses a decanter to discharge the supernatant, which can decant the treated supernatant without stirring the sediment. However, the decanter usually relies on control components and sealing friction, so its structure is relatively complex, which not only requires more energy consumption and regular maintenance, but is also more likely to cause mechanical failures, control component failures and other problems.
[0011] In view of the above problems, the utility model designs a novel SBR equipment drainage device, which ensures that it can treat sewage efficiently and stably by reasonably improving the structure of SRB technology. Summary of the invention
[0012] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a novel SBR equipment drainage device, which ensures that it can efficiently and stably treat sewage by reasonably improving the structure of the SRB technology.
[0013] In order to achieve the above-mentioned purpose, the utility model provides a novel SBR equipment drainage device, a water inlet pipe is arranged on the left side of the SBR tank body, the water inlet pipe is connected with the aeration system through a pipeline, a lifting pump platform is arranged on the right side of the SBR tank body, a lifting pump is arranged on the lifting pump platform, the lifting pump is provided with a check valve, a pneumatic valve and a butterfly valve in sequence according to the drainage direction of the pipeline, the outer side of the butterfly valve is a water outlet, a mud discharge pipe is arranged at the bottom of the right side of the SBR tank body, and the height of the lifting pump platform is located at the interface between the clean water area and the sludge area after sedimentation.
[0014] The water inlet pipe is set with the elbow facing downward.
[0015] The aeration system includes aerators arranged in a matrix.
[0016] Check valves, pneumatic valves and butterfly valves are all connected to the pipeline through flanges.
[0017] Compared with the prior art, the utility model abandons the traditional decanter and replaces the decanter with a lifting pump, a check valve and a pneumatic valve. The pneumatic valve and the lifting pump operate synchronously to control the water outlet. The utility model has a simple structure, reduces the installation and debugging of the decanter and auxiliary equipment, reduces the equipment failure rate, and is more convenient to operate and maintain, thereby ensuring that the water outlet is stable and meets the discharge standards. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a plan view of the SBR equipment of the present utility model.
[0019] Figure 2 It is a schematic elevation diagram of the SBR drainage device of the utility model.
[0020] Description of reference numerals:
[0021] 1 is the SBR tank body, 2 is the water inlet pipe, 3 is the aeration system, 4 is the lifting pump platform, 5 is the water outlet, 6 is the butterfly valve, 7 is the lifting pump, 8 is the check valve, 9 is the pneumatic valve, and 10 is the mud discharge pipe. DETAILED DESCRIPTION
[0022] The utility model is now further described with reference to the accompanying drawings.
[0023] See also Figures 1-2The utility model provides a novel drainage device for SBR equipment. A water inlet pipe 2 is arranged on the left side of the SBR tank body 1. The water inlet pipe 2 is connected to the aeration system 3 through a pipeline. A lifting pump platform 4 is arranged on the right side of the SBR tank body 1. A lifting pump 7 is arranged on the lifting pump platform 4. The produced water is lifted to the sewage pipe network through time control. The lifting pump 7 is sequentially provided with a check valve 8, a pneumatic valve 9 and a butterfly valve 6 according to the drainage direction of the pipeline. The pneumatic valve 9 is opened and closed through time control to prevent siphoning (i.e., in the non-water production stage, the pressure difference is generated due to the water level in the tank being higher than the factory sewage pipe network), thereby avoiding the loss of activated sludge caused by siphoning. The check valve 8 can prevent the reverse flow of the outlet water after the lifting pump stops. The outer side of the butterfly valve 6 is the outlet 5. A mud discharge pipe 10 is arranged at the bottom of the right side of the SBR tank body 1. The height of the lifting pump platform 4 is located at the interface between the clean water area and the sludge area after sedimentation, so as to ensure that no sludge is entrained when the water is produced.
[0024] The water inlet pipe 2 is set with an elbow facing downward but not touching the water surface to prevent the SBR reaction tank water from flowing back to the raw water tank due to the pressure in the tank being higher than the raw water level.
[0025] The aeration system 3 includes aerators arranged in a matrix, which supply oxygen to the pool through intermittent aeration by fans, thereby providing the activated sludge with the necessary oxygen for survival.
[0026] The check valve 8, the pneumatic valve 9 and the butterfly valve 6 are all connected to the pipeline through flanges, which is more convenient for maintenance and inspection.
[0027] Working principle:
[0028] The utility model does not require much debugging when in use:
[0029] The organic wastewater to be treated enters the SBR reaction tank 1 through the water inlet pipe 2, and the water inlet stops when the water inlet reaches the set time. Then the aeration fan is started to aerate and stir the SBR reaction tank 1 through the aeration system 3 to meet the oxygen required by aerobic microorganisms and ensure that the sewage and activated sludge are fully in contact.
[0030] When the aeration reaches the set time, the aeration fan stops running, and the sedimentation stage begins. When the sedimentation static time reaches the set time, the lift pump 7 on the lift pump platform 4 starts, and the pneumatic valve 9 switches from closed to open. The butterfly valve 6 opens, the water outlet 5 is connected to the external pipeline, and the supernatant in the SBR reaction tank 1 is discharged. When the liquid level in the SBR reaction tank 1 is equal to the lift pump platform 4, the lift pump 7 stops running, the pneumatic valve 9 closes, and the check valve 8 plays a role.
[0031] The reaction enters the idle stage. If the sludge concentration in the SBR reaction tank 1 is too high, the sludge discharge pipe 10 can be connected to an external sludge discharge pump to discharge the excess sludge into the sludge tank.
[0032] When the idle process reaches the set time, a cycle ends and enters the next operation cycle, and the cycle continues.
[0033] The above are only preferred implementations of the present invention, which are only used to help understand the method and core ideas of the present application. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
[0034] The utility model solves the problems of the prior art caused by reliance on a decanter, such as complex structure, more energy consumption, high maintenance frequency, more prone to mechanical failure, failure of control components, etc. The decanter is replaced by a lifting pump, a check valve and a pneumatic valve, and the pneumatic valve and the lifting pump are operated synchronously to control the water outlet. The utility model has a simple structure, reduces the installation and commissioning of the decanter and auxiliary equipment, reduces the equipment failure rate, and is more convenient to operate and maintain, thereby ensuring that the water outlet is stable and meets the discharge standards.
Claims
1. A new type of SBR equipment drainage device, characterized in that: A water inlet pipe (2) is arranged on the left side of the SBR tank body (1), and the water inlet pipe (2) is connected to an aeration system (3) through a pipeline. A lift pump platform (4) is arranged on the right side of the SBR tank body (1), and a lift pump (7) is arranged on the lift pump platform (4). The lift pump (7) is provided with a check valve (8), a pneumatic valve (9) and a butterfly valve (6) in sequence according to the drainage direction of the pipeline, and the outer side of the butterfly valve (6) is a water outlet (5). A mud discharge pipe (10) is arranged at the bottom of the right side of the SBR tank body (1), and the height of the lift pump platform (4) is located at the interface between the clear water area and the mud area after sedimentation.
2. The novel SBR equipment drainage device according to claim 1 is characterized in that: The water inlet pipe (2) is arranged with its elbow facing downwards.
3. The novel SBR equipment drainage device according to claim 1 is characterized in that: The aeration system (3) comprises aerators arranged in a matrix.
4. The novel SBR equipment drainage device according to claim 1 is characterized in that: The check valve (8), the pneumatic valve (9) and the butterfly valve (6) are all connected to the pipeline via flanges.