Sewage purification aeration system

Abstract

The utility model provides a sewage purification aeration system which comprises a sedimentation tank, a filter tank, an aeration tank, a filter tank, an electrolytic tank and a buffer tank which are sequentially connected, the sedimentation tank is externally connected with a sewage ingress pipe, a water quality sensor is arranged in the buffer tank, and a water outlet with an electromagnetic valve is arranged in the buffer tank; an oxygenation pump is arranged in the aeration tank, a crushing cover is arranged outside the oxygenation pump, and long grooves are formed in the top and the bottom of the crushing cover at intervals respectively. The structure in the aeration tank is improved, external water flow is guided in through the crushing cover covering the oxygenation pump and the long grooves in the top and the bottom of the crushing cover, meanwhile, the oxygenation pump generates small bubbles, the small bubbles and the water flow can be fully mixed through the impellers on the two sides, meanwhile, the diffusion blades are utilized, and the aeration effect is improved. Water flow mixed with water vapor is guided to the middle and diffused outwards through the through holes in the middle of the crushing cover, so that the oxygen content in the water vapor is increased, and it is guaranteed that the oxygen content in output water is stable and reaches the standard.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage purification aeration system. Background Art

[0002] Ammonia nitrogen is a very important water quality indicator in my country's water quality monitoring, and it is also an important issue affecting my country's water quality safety. Ammonia nitrogen mainly exists in the form of free ammonia (NH3) and ammonium ions (NH4+). Like COD, ammonia nitrogen will also consume dissolved oxygen in the water body and deteriorate the water quality. On the other hand, algae in the water body use ammonia nitrogen as a nutrient. Excessive ammonia nitrogen, in many cases accompanied by a large amount of phosphorus, will cause the algae to grow rapidly and affect the ecological environment.

[0003] Through long-term tracking of existing integrated domestic treatment equipment, it was found that the use of traditional biological treatment processes can easily make ammonia nitrogen and COD meet the Level B standard in the "Pollutant Discharge Standard for Urban Wastewater Treatment Plants" GB18918-2002. If higher standards are to be achieved, the existing processes and equipment need to be upgraded and modified accordingly to improve water quality.

[0004] At present, the most effective way to treat domestic sewage in villages and towns is to use low-cost small and medium-sized sewage treatment equipment. Decentralized sewage treatment equipment generally adopts AO+ contact oxidation biochemical treatment process, and the equipment is divided into three functional sections: anoxic, aerobic, and sedimentation. The main functional section of the equipment to remove pollutants is the aerobic section. The air pump continuously oxygenates the aerobic zone, making the microorganisms attached and grown on the aerobic biological filler in an active state, continuously removing pollutants in the water body, and achieving the effect of purifying water quality.

[0005] However, the current AO+ contact oxidation biochemical treatment process has a low oxygen content in the treated water during urban sewage purification and is unstable, making it difficult to meet actual needs. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a sewage purification aeration system. In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A sewage purification aeration system comprises a sedimentation tank, a filter tank, an aeration tank, a filter tank, an electrolytic tank and a buffer tank which are connected in sequence, wherein the sedimentation tank is externally connected to a sewage inlet pipe, the buffer tank is internally provided with a water quality sensor, and a water outlet with a solenoid valve is arranged in the buffer tank; an aeration pump is arranged in the aeration tank, and an outer cover of the aeration pump is provided with a crushing cover, the top and bottom of the crushing cover are respectively provided with long grooves at intervals, and a through hole is arranged in the middle of the crushing cover, an output end of the aeration pump is fixedly connected to a mounting shaft, the top and bottom of the mounting shaft are respectively rotatably provided with impellers, and a diffusion blade is arranged in the middle of the mounting shaft.

[0008] Furthermore, the filter tank is equipped with a filter screen, an activated carbon layer, an anthracite layer and a sand and gravel layer from top to bottom; the anthracite layer is crushed block-shaped coal particles.

[0009] Furthermore, the electrolytic cell comprises a shell, a negative electrode net and a positive electrode net, wherein the negative electrode net and the positive electrode net are cylindrically sleeved in the shell, and the negative electrode net and the positive electrode net are spaced apart.

[0010] Furthermore, it also includes a controller, which is electrically connected to the oxygen pump, water quality sensor, negative electrode network and positive electrode network respectively.

[0011] Furthermore, a cover plate is arranged on the top of the crushing cover.

[0012] Furthermore, a return pipe is installed in the aeration tank, and the return pipe is externally connected to the filter tank.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] By improving the structure inside the aeration tank, a crushing hood is set outside the oxygen pump, and the long grooves on the top and bottom of the crushing hood are used to guide the external water flow. At the same time, the oxygen pump produces fine bubbles, and the impellers on both sides can fully mix the fine bubbles with the water flow. At the same time, the diffusion blades are used to guide the water flow mixed with water vapor to the middle part, and diffuse it outward through the through holes in the middle of the crushing hood to increase the oxygen content in the water vapor, ensuring that the oxygen content in the output water quality is stable and meets the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the principle structure of the aerator of the utility model;

[0017] Figure 2 A bottom view of the aerator of the utility model;

[0018] Figure 3 A top view of the aerator of the utility model;

[0019] Figure 4 The utility model is a three-dimensional structural diagram of the guide plate of the aerator.

[0020] In the above drawings: sedimentation tank 1, sewage inlet pipe 11, filter tank 2, filter screen 21, activated carbon layer 22, anthracite layer 23, sand and gravel layer 24, aeration tank 3, oxygen pump 31, crushing cover 32, long groove 33, through hole 34, mounting shaft 35, impeller 36, diffuser blade 37, cover plate 38, filter tank 4, electrolytic cell 5, shell 51, negative electrode net 52, positive electrode net 53, buffer tank 6, water quality sensor 61, reflux pipe 7. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1 , and combined with Figure 2 and Figure 3 As shown, a sewage purification aeration system of the utility model comprises a sedimentation tank 1, a filter tank 2, an aeration tank 3, a filter tank 4, an electrolytic cell 5 and a buffer tank 6 which are connected in sequence, the sedimentation tank 1 is externally connected to a sewage inlet pipe 11, the buffer tank 6 has a built-in water quality sensor 61, and a water outlet with a solenoid valve is arranged in the buffer tank 6; an aeration pump 31 is arranged in the aeration tank 3, and a crushing cover 32 is arranged on the outer cover of the aeration pump 31, long grooves 33 are arranged at intervals on the top and bottom of the crushing cover 32, and a through hole 34 is arranged in the middle of the crushing cover 32, and an output end of the aeration pump 31 is fixedly connected to a mounting shaft 35, and impellers 36 are rotatably arranged on the top and bottom of the mounting shaft 35, and a diffusion blade 37 is arranged in the middle of the mounting shaft 35.

[0023] During operation, the wastewater to be treated is first introduced through the sewage inlet pipe 11, and the wastewater enters the sedimentation tank 1 for sedimentation to deposit the sand heavier than water at the bottom of the tank, and then the upper layer of water is introduced into the filter tank 2 for filtration, that is, the fine particles in the water that cannot be filtered through the sedimentation are filtered through the filter tank 2.

[0024] It should be noted that, see Figure 2 As shown, the filter of the utility model is equipped with a filter screen 21, an activated carbon layer 22, an anthracite layer 23 and a sandstone layer 24 from top to bottom; the anthracite layer 23 is a crushed block of coal. The filter screen 21 can isolate the plant leaves in the water, and then the activated carbon layer 22 and the anthracite layer 23 filter and decompose soluble substances such as ammonia, iron, and manganese to improve the filtering efficiency. And because the anthracite layer 23 is a crushed block of coal, it has good carbonization and fixed carbon, low volatility, and low turbidity characteristics. Therefore, it can filter impurities finer than activated carbon during filtering.

[0025] The impurity content of the water after being treated by the filter tank 2 is low, and at this time, it is mainly some chemical components that exceed the standard. Therefore, the filtered water is introduced into the aeration tank 3. Due to the effect of the crushing cover 32, the water entering the aeration tank 3 will be introduced from the long grooves 33 at the top and bottom of the crushing cover 32. Under the action of the oxygen pump 31 in the aeration tank 3, fine bubbles are generated in the crushing cover 32, which are fully mixed with water through the impellers 36 at the top and bottom, and are guided to the middle under the action of the impeller 36, and are discharged through the through hole 34 in the middle of the crushing cover 32.

[0026] Then, secondary filtration is performed through the filter tank 4, and then electrolysis treatment is performed in the electrolytic tank 5 to achieve the purpose of sterilization. The water after electrolysis enters the buffer tank 6, and the water pollution, turbidity and pH concentration of the water quality after the final purification treatment are obtained through the water quality sensor 61 in the buffer tank 6. If the water meets the standards, it will be discharged. If it does not meet the standards, a reflux pipe 7 can be added between the buffer tank 6 and the aeration tank 3 to enable the water quality in the buffer tank 6 to be introduced into the aeration tank 3 through the reflux pipe 7 by a water pump for secondary treatment.

[0027] Preferably, in order to prevent the crushing cover 32 and the oxygen pump 31 in the crushing cover 32 from being accidentally damaged, the utility model further installs a cover plate 38 on the top of the crushing cover 32 .

[0028] The aeration tank 3 of the utility model is equipped with a return pipe 7, and the return pipe 7 is externally connected to the filter tank 2. The return pipe 7 can ensure that the impurities in the water entering the filter tank 4 are low, and ensure that the water in the filter tank 4 does not contain large impurities. The filter tank 4 is sequentially equipped with a non-woven winding filter, a microfiltration filter and a carbon filter. Specifically, the non-woven winding filter is used to filter simple common impurities and pollutants in the water, and the microfiltration filter generally uses an MF filter to remove rust, etc. The carbon filter is a filter for removing odors in the water, and prevents rapid pollution by removing organic matter.

[0029] Please continue reading Figure 4 As shown, the electrolytic cell 5 of the present invention comprises a shell 51, a negative electrode net 52 and a positive electrode net 53. The negative electrode net 52 and the positive electrode net 53 are cylindrically sleeved in the shell 51, and the negative electrode net 52 and the positive electrode net 53 are spaced apart.

[0030] In order to solve the problem that small power plants in villages and towns are dispersed and difficult to centrally manage, the utility model also includes a controller, which is electrically connected to the oxygen pump 31, the water quality sensor 61, the negative electrode network 52 and the positive electrode network 53 respectively.

[0031] When in use, the controller can monitor the purification process of treated water and control each treatment tank (sedimentation tank 1, filtration tank 4, aeration tank 3, filtration unit, electrolysis tank 5, etc.) to ensure error-free and accurate purification treatment and management. By storing treated water information and converting it into a database (DB), big data can be used to effectively manage treated water.

[0032] The utility model improves the structure in the aeration tank 3, utilizes the crushing cover 32 that is arranged outside the oxygenation pump 31, utilizes the long grooves 33 at the top and bottom of the crushing cover 32 to introduce the external water flow, and at the same time the oxygenation pump 31 generates fine bubbles, and the fine bubbles and the water flow can be fully mixed through the impellers 36 on both sides, and at the same time, the diffusion blades 37 are used to guide the water flow mixed with water vapor to the middle part, and diffuse it outward through the through holes 34 in the middle part of the crushing cover 32, so as to increase the oxygen content in the water vapor, and ensure that the oxygen content in the output water quality is stable and meets the standard.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A sewage purification aeration system, characterized in that: It comprises a sedimentation tank, a filter tank, an aeration tank, a filter tank, an electrolytic tank and a buffer tank which are connected in sequence. The sedimentation tank is externally connected to a sewage inlet pipe, the buffer tank is built with a water quality sensor, and a water outlet with a solenoid valve is arranged in the buffer tank; an aeration pump is arranged in the aeration tank, and an outer cover of the aeration pump is provided with a crushing cover, the top and bottom of the crushing cover are respectively provided with long grooves at intervals, and a through hole is arranged in the middle of the crushing cover, the output end of the aeration pump is fixedly connected with a mounting shaft, the top and bottom of the mounting shaft are respectively rotatably provided with impellers, and a diffusion blade is arranged in the middle of the mounting shaft.

2. A sewage purification aeration system as claimed in claim 1, characterized in that: The filter tank is equipped with a filter screen, an activated carbon layer, an anthracite layer and a sandstone layer from top to bottom; the anthracite layer is crushed block-shaped coal particles.

3. A sewage purification aeration system as claimed in claim 1, characterized in that: The electrolytic cell comprises a shell, a negative electrode net and a positive electrode net. The negative electrode net and the positive electrode net are cylindrically sleeved in the shell, and the negative electrode net and the positive electrode net are spaced apart.

4. A sewage purification aeration system as claimed in claim 3, characterized in that: It also includes a controller, which is electrically connected to the oxygen pump, the water quality sensor, the negative electrode network and the positive electrode network respectively.

5. A sewage purification aeration system as claimed in claim 1, characterized in that: A cover plate is arranged on the top of the crushing cover.

6. A sewage purification aeration system as claimed in claim 1, characterized in that: A return pipe is arranged in the aeration tank, and the return pipe is externally connected to the filter tank.

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