Large-proportion backflow gas lifting device

Abstract

The utility model discloses a large-proportion return air lifting device, which particularly relates to the technical field of sewage treatment and comprises a lifting tank, a support is supported on the outer side of the lifting tank, a top cover is mounted at the top end of the lifting tank, a sewage inlet pipe is mounted in the middle of the top cover, and the bottom end of the sewage inlet pipe extends to the inner bottom end of the lifting tank. A water inlet pipe is mounted on the top cover, an aeration assembly is mounted in the lifting tank and connected with an air inlet mechanism, a return pipe is mounted on the top cover, a blow-off pipe is arranged at the bottom end of the lifting tank, a valve is mounted on the blow-off pipe, and the aeration assembly comprises a sleeve, an aeration pipe and a baffle disc. The sleeve is mounted at the bottom end of the top cover, a baffle disc is mounted at the bottom of the sleeve, and a plurality of aeration pipes are mounted above the baffle disc in an annular array. According to the utility model, large-proportion sewage backflow lifting can be realized, the wastewater treatment efficiency is improved, and the high-efficiency treatment requirements of processes such as biological nitrogen and phosphorus removal are met.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and more specifically, to a large-ratio return air lifting device. Background Art

[0002] With the rapid development of industry and the growing population, wastewater treatment is becoming an increasingly serious problem. Traditional wastewater treatment processes often require the return of a portion of treated water to a specific treatment unit to improve treatment efficiency and resource utilization. However, existing return systems often suffer from low return rates, high energy consumption, and complex operation.

[0003] In some wastewater treatment processes, such as biological nitrogen and phosphorus removal, the effluent from aerobic tanks, which contain large amounts of nitrate nitrogen, must be recirculated to anoxic tanks for denitrification to remove total nitrogen from the wastewater. However, traditional recirculation methods, such as pump reflux, are not only energy-intensive but also have limited recirculation ratios, making them difficult to meet the requirements for efficient nitrogen removal. Furthermore, some mechanical recirculation devices suffer from drawbacks such as high wear, high maintenance costs, and poor operational stability.

[0004] Therefore, a large-ratio reflux gas lifting device is now proposed. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a large-ratio return air lifting device to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-proportion return air lifting device, comprising a lifting tank, a bracket supporting the outer side of the lifting tank, a top cover installed on the top of the lifting tank, a sewage inlet pipe installed in the middle of the top cover, the bottom end of the sewage inlet pipe extending to the bottom end of the lifting tank, a water inlet pipe installed on the top cover, an aeration assembly installed inside the lifting tank, the aeration assembly connected to an air intake mechanism, and a return pipe installed on the top cover.

[0007] The first water pump draws external sewage from the sewage inlet pipe into the lifting tank, and the air intake mechanism operates to input air into the aeration component. The aeration component generates a large number of bubbles that rise in the lifting tank, thereby increasing the air pressure inside the lifting tank. The bubbles mix with water, so that the mixture of bubbles and water is quickly discharged from the return pipe, and the sludge settles at the bottom of the lifting tank. When the sludge needs to be cleaned after a period of time, the valve on the sewage pipe is opened, and the second water pump pumps clean water from the water inlet pipe into the lifting tank, so that the sludge in the lifting tank is quickly discharged from the sewage pipe, and at the same time, the inside of the lifting tank is cleaned.

[0008] Preferably, a sewage pipe is provided at the bottom end of the lifting tank, and a valve is installed on the sewage pipe.

[0009] Preferably, the aeration assembly includes a sleeve, an aeration tube and a baffle, the sleeve is installed at the bottom end of the top cover, the baffle is installed at the bottom of the sleeve, and a plurality of aeration tubes are installed in a circular array above the baffle.

[0010] Preferably, the air intake mechanism includes an air intake pipe, an air compressor and a gas regulating valve. One end of the air intake pipe is connected to the air compressor, and the other end of the air intake pipe is connected to the sleeve. The air intake pipe is equipped with a gas regulating valve.

[0011] Preferably, the sewage inlet pipe is connected to a first water pump, and the bottom end of the sewage inlet pipe passes through the sleeve and is located at the bottom of the baffle.

[0012] Preferably, the water inlet pipe is connected to a second water pump, and the second water pump is installed on the top cover.

[0013] Preferably, a check valve is installed on the return pipe, and a flow regulating valve is installed on one side of the check valve.

[0014] Technical effects and advantages of this utility model:

[0015] 1. Using bubbles generated by aeration to lift sewage can achieve a large proportion of return flow, thereby improving the efficiency of wastewater treatment. This is especially true for processes that require the treated water to be returned to specific treatment units, such as biological denitrification and phosphorus removal processes, and can meet the requirements of efficient denitrification.

[0016] 2. The bracket on the outside of the lifting tank provides stable support to ensure the stability of the device during operation. The design of the top cover facilitates the installation and maintenance of components such as the sewage inlet pipe, water inlet pipe, and return pipe.

[0017] 3. The combination of sleeve, aeration tube and baffle in the aeration assembly can evenly distribute the air in the lifting tank, improve the aeration effect, and thus enhance the sewage lifting capacity.

[0018] 4. The water inlet pipe is connected to the second water pump, which can flexibly adjust the liquid level and sewage concentration in the lifting tank according to actual conditions. At the same time, it can discharge the sludge inside the lifting tank and clean the lifting tank to adapt to different treatment needs. The check valve and flow regulating valve on the return pipe can effectively control the flow and direction of the return sewage to ensure the stability and reliability of the system operation.

[0019] 5. A sewage pipe is set at the bottom of the lifting tank. After the device has been running for a period of time, the sludge and other impurities accumulated in the tank can be discharged by opening the valve, which is convenient for maintenance and cleaning of the device and extends the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of the lifting tank of the present utility model.

[0022] Figure 3 This is a schematic diagram of the connection structure of the air intake mechanism and the aeration component of the utility model.

[0023] The accompanying drawings are marked as follows: 1. lifting tank; 2. bracket; 3. top cover; 4. sewage inlet pipe; 5. water inlet pipe; 6. sewage discharge pipe; 7. valve; 8. air intake mechanism; 801. air intake pipe; 802. air compressor; 803. gas regulating valve; 9. return pipe; 10. aeration assembly; 1001. sleeve; 1002. aeration pipe; 1003. baffle; 11. check valve; 12. flow regulating valve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] As attached Figure 1-3 A large-scale return air lifting device shown in the figure includes a lifting tank 1, the outer side of the lifting tank 1 is supported by a bracket 2, a top cover 3 is installed on the top of the lifting tank 1, a sewage inlet pipe 4 is installed in the middle of the top cover 3, the bottom end of the sewage inlet pipe 4 extends to the bottom end of the lifting tank 1, a water inlet pipe 5 is installed on the top cover 3, an aeration component 10 is installed inside the lifting tank 1, the aeration component 10 is connected to the air intake mechanism 8, and a return pipe 9 is installed on the top cover 3.

[0026] During specific implementation, the external sewage is pumped into the lifting tank 1 from the sewage inlet pipe 4 through the first water pump, the air intake mechanism 8 is operated, and air is input into the aeration component 10. The aeration component 10 generates a large number of bubbles that rise in the lifting tank 1, thereby increasing the internal air pressure of the lifting tank 1, and the bubbles are mixed with water, so that the mixture of bubbles and water is quickly discharged from the return pipe 9, and the sludge is deposited at the bottom of the lifting tank 1. When the sludge needs to be cleaned after a period of time, the valve 7 on the sewage pipe 6 is opened, and the second water pump pumps clean water from the water inlet pipe 5 into the lifting tank 1, so that the sludge in the lifting tank 1 is quickly discharged from the sewage pipe 6, and at the same time, the inside of the lifting tank 1 is cleaned.

[0027] A sewage pipe 6 is provided at the bottom end of the lifting tank 1 , and a valve 7 is installed on the sewage pipe 6 .

[0028] During specific implementation, the drain pipe 6 can be opened by opening the valve 7 , thereby facilitating the cleaning of the sludge accumulated in the lifting tank 1 .

[0029] The aeration assembly 10 includes a sleeve 1001, an aeration tube 1002 and a baffle 1003. The sleeve 1001 is installed at the bottom end of the top cover 3. The baffle 1003 is installed at the bottom of the sleeve 1001. A plurality of aeration tubes 1002 are installed in a circular array above the baffle 1003.

[0030] The air intake mechanism 8 includes an air intake pipe 801 , an air compressor 802 , and a gas regulating valve 803 . One end of the air intake pipe 801 is connected to the air compressor 802 , and the other end of the air intake pipe 801 is connected to the sleeve 1001 . The air intake pipe 801 is equipped with a gas regulating valve 803 .

[0031] In practice, the air compressor 802 operates, regulated by the gas regulating valve 803, allowing an appropriate flow of air to enter the sleeve 1001 from the air inlet pipe 801. The air is then dispersed and discharged from each aeration pipe 1002. This air and sewage fully interact, generating a large number of tiny bubbles. The buoyancy of the bubbles causes the sewage and air bubbles to form a mixture, reducing their density. This reduced-density air-water mixture rises within the lift tank 1, driving the sewage upward. When the mixture reaches the top cover 3, it flows out of the lift tank 1 through the return pipe 9, thereby improving the efficiency of water return in the sewage.

[0032] The sewage inlet pipe 4 is connected to a first water pump, and the bottom end of the sewage inlet pipe 4 passes through the sleeve 1001 and is located at the bottom of the baffle 1003.

[0033] A check valve 11 is installed on the return pipe 9 , a flow regulating valve 12 is installed on one side of the check valve 11 , and a second water pump is connected to the water inlet pipe 5 , which is installed on the top cover 3 .

[0034] In specific implementation, when the mixture rises to the top cover 3, it flows out of the lifting tank 1 through the return pipe 9. The check valve 11 on the return pipe 9 prevents the returned sewage from flowing back, and the flow regulating valve 12 can adjust the flow of the returned sewage according to actual needs.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A large-ratio reflux gas lifting device, comprising a lifting tank (1), characterized in that: The outer side of the lifting tank (1) is supported by a bracket (2), the top of the lifting tank (1) is installed with a top cover (3), the middle of the top cover (3) is installed with a sewage inlet pipe (4), the bottom end of the sewage inlet pipe (4) extends to the bottom end of the interior of the lifting tank (1), the top cover (3) is installed with a water inlet pipe (5), the interior of the lifting tank (1) is installed with an aeration component (10), the aeration component (10) is connected to an air intake mechanism (8), and the top cover (3) is installed with a return pipe (9).

2. A large-ratio reflux gas lifting device according to claim 1, characterized in that: A sewage pipe (6) is provided at the bottom end of the lifting tank (1), and a valve (7) is installed on the sewage pipe (6).

3. A large-ratio reflux gas lifting device according to claim 2, characterized in that: The aeration assembly (10) comprises a sleeve (1001), an aeration tube (1002) and a baffle (1003); the sleeve (1001) is mounted on the bottom end of the top cover (3); the baffle (1003) is mounted on the bottom of the sleeve (1001); and a plurality of aeration tubes (1002) are mounted in a circular array above the baffle (1003).

4. A large-ratio reflux gas lifting device according to claim 3, characterized in that: The air intake mechanism (8) comprises an air intake pipe (801), an air compressor (802) and a gas regulating valve (803); one end of the air intake pipe (801) is connected to the air compressor (802); the other end of the air intake pipe (801) is connected to the sleeve (1001); and the gas regulating valve (803) is installed on the air intake pipe (801).

5. A large-ratio reflux gas lifting device according to claim 4, characterized in that: The sewage inlet pipe (4) is connected to a first water pump, and the bottom end of the sewage inlet pipe (4) passes through the sleeve (1001) and is located at the bottom of the baffle (1003).

6. A large-ratio reflux gas lifting device according to claim 5, characterized in that: The water inlet pipe (5) is connected to a second water pump, and the second water pump is mounted on the top cover (3).

7. A large-ratio reflux gas lifting device according to claim 6, characterized in that: A check valve (11) is installed on the return pipe (9), and a flow regulating valve (12) is installed on one side of the check valve (11).

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