Energy-saving and consumption-reducing sewage treatment equipment

Abstract

The present invention discloses a sewage treatment equipment for energy saving and consumption reduction, comprising an anoxic tank, an aerobic tank and a second clarification tank which are arranged in sequence, characterized in that it also comprises an external return pipe, an internal return pipe, a first return pipe and a second return pipe; the inlet of the external return pipe is located in the aerobic tank and is connected to a water pump, and the outlet of the external return pipe is located in the anoxic tank; the inlet end of the internal return pipe is connected to the external return pipe, and the outlet end is located in the aerobic tank and is connected to an aerator; the inlets of the first return pipe and the second return pipe are respectively located in the aerobic tank and the second clarification tank, and the outlets are both connected to the external return pipe. The present application can use one water pump to complete oxygenation, reflux, anoxic stirring, sludge reflux, and nitrification liquid reflux, which is convenient for control and achieves energy saving and consumption reduction, saving costs.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, and in particular to energy-saving and consumption-reducing sewage treatment equipment. Background Art

[0002] During the sewage treatment process, it generally passes through anoxic tanks, aerobic tanks and secondary clarification tanks in sequence, and reflux is required when necessary. During the reciprocating circulation of materials, many water pumps are inevitably used to control the flow of sewage. The increase in the number of water pumps increases costs on the one hand, and increases the difficulty of control on the other hand. Frequent opening and closing of water pumps may shorten the service life of water pumps. Therefore, a sewage treatment equipment that can reduce the number of water pumps to facilitate control and save energy is particularly important. Summary of the invention

[0003] The purpose of the present invention is to provide an energy-saving and consumption-reducing sewage treatment equipment to solve the problem that a water pump is provided for each pipeline in the sewage treatment process, and the number of water pumps is large and inconvenient to control.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An energy-saving and consumption-reducing sewage treatment equipment comprises an anoxic tank, an aerobic tank and a secondary clarification tank which are arranged in sequence, characterized in that it also comprises an external return pipe, an internal return pipe, a first return pipe and a second return pipe;

[0006] The inlet of the external reflux pipe is located in the aerobic tank and is connected to a water pump, and the outlet of the external reflux pipe is located in the anoxic tank;

[0007] The inlet end of the inner return pipe is connected to the outer return pipe, and the outlet end is located in the aerobic tank and connected to an aerator;

[0008] The inlets of the first reflux pipe and the second reflux pipe are respectively located in the aerobic tank and the second clarification tank, and the outlets are both connected to the external reflux pipe.

[0009] Preferably, a mixer is provided at the connection between the outer reflux pipe, the first reflux pipe and the second reflux pipe.

[0010] Preferably, the aerator comprises a cylinder and an air inlet pipe arranged at one end of the cylinder, a fixed block which can move axially along the cylinder is arranged in the cylinder, and a swirl blade which drives the fixed block to rotate is arranged on the fixed block.

[0011] Preferably, a sliding rod is provided in the cylinder, at least one end of the sliding rod is fixed on the cylinder, and the fixing block is sleeved on the sliding rod.

[0012] Preferably, a collecting cover is provided at the lower end of the cylinder, the air outlet of the air inlet pipe is located in the collecting cover, and a liquid phase channel is provided between the collecting cover and the air outlet.

[0013] Preferably, at least one sudden cross section is provided on the cylinder around the fixing block, and the inner diameters of the cylinder on both sides of the sudden cross section are different.

[0014] Preferably, the cross-section of the fixing block gradually increases in a direction away from the air inlet pipe.

[0015] Preferably, an elastic member is provided on a side of the fixing block away from the air inlet pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are at least one of the following:

[0017] One water pump can be used to complete oxygenation, reflux, anoxic stirring, sludge reflux, and nitrification liquid reflux, which is convenient for control and achieves energy saving and consumption reduction, saving costs.

[0018] When the oscillating aerator in the present application is used, the air intake of the air intake pipe can be adjusted so that the gas in the air intake pipe continues to change, so that the fixed block continuously moves up and down under the combined action of the upward lifting force of the gas and its own gravity. In the process of up and down movement, the impact force of the gas-liquid mixture on the fixed block and the swirl blades changes, which is more conducive to the dispersion of the gas in the liquid phase than not setting the fixed block and swirl blades.

[0019] In addition, after the fluid hits the swirl blade, since the swirl blade has a certain inclination angle, the fluid has a certain thrust on the swirl blade, causing the swirl blade to rotate around the fixed block, and the gas-liquid mixing effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a structural schematic diagram of the aerator in the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] This embodiment provides a sewage treatment device that saves energy and reduces consumption. Figure 1 As shown, it includes an anoxic pool 1, an aerobic pool 2 and a second clarification pool 3 arranged in sequence, and is characterized in that it also includes an external return pipe 4, an internal return pipe 5, a first return pipe 6 and a second return pipe 7;

[0024] The inlet of the external reflux pipe 4 is located in the aerobic tank 2 and is connected to a water pump, and the outlet of the external reflux pipe 4 is located in the anoxic tank 1;

[0025] The inlet end of the inner return pipe 5 is connected to the outer return pipe 4, and the outlet end is located in the aerobic tank 2 and is connected to the aerator 8;

[0026] The inlets of the first reflux pipe 6 and the second reflux pipe 7 are respectively located in the aerobic tank 2 and the second clarification tank 3 , and the outlets are both connected to the external reflux pipe 4 .

[0027] In the energy-saving and consumption-reducing sewage treatment equipment of the present embodiment, valves are provided on each pipeline. When working, the corresponding valves can be adjusted first to keep the required pipelines unobstructed, and then the water pump can be turned on for reflux. Specifically: when the external reflux pipe 4 is kept unobstructed, the water in the aerobic pool 2 can be returned to the anoxic pool 1; if the internal reflux pipe 5 is kept unobstructed at this time, part of the water in the aerobic pool 2 will be returned to the aerobic pool 2, playing a stirring role on the aerobic pool 2; due to the flow of liquid in the external reflux pipe 4, a negative pressure will be given to the first reflux pipe 6 and the second reflux pipe 7, so that when the valves on the first reflux pipe 6 and the second reflux pipe 7 are opened, the water in the aerobic pool 2 or the water in the second clarification pool 3 can be returned to the anaerobic pool.

[0028] The inner reflux pipe 5 is provided with an aerator 8 , which can not only play a stirring role on the aerobic pool 2 , but also increase the oxygen content in the aerobic pool 2 .

[0029] This embodiment can use one water pump to complete oxygenation, reflux, anoxic stirring, sludge reflux, and nitrification liquid reflux, which is convenient for control and saves costs.

[0030] Furthermore, a mixer 9 is provided at the connection between the outer return pipe 4 and the first return pipe 6 and the second return pipe 7 in this embodiment.

[0031] The mixer 9 can fully mix the sewage returned from the secondary clarification tank 3 and the aerobic tank 2 with the sewage from the external return pipe 4. The structure of the mixer 9 can be simple or complex. A complex one can use a special mixing device, while a simple one can set up a mixing tank to mix the liquids by mutual collision when they flow.

[0032] Furthermore, the aerator 8 in this embodiment includes a cylinder 81 and an air inlet pipe 82 arranged at one end of the cylinder 81, a fixed block 83 capable of moving axially along the cylinder 81 is arranged in the cylinder 81, and a swirl blade 84 driving the fixed block 83 to rotate is arranged on the fixed block 83, such as Figure 2 shown.

[0033] When the oscillating aerator 8 in this embodiment is in use, the air intake of the air intake pipe 82 can be adjusted so that the gas in the air intake pipe 82 keeps changing, so that the fixed block 83 is continuously moved up and down under the combined action of the upward lifting force of the gas and its own gravity. In the process of moving up and down, the impact force of the gas-liquid mixture on the fixed block 83 and the swirl blade 84 changes, which is more conducive to the dispersion of the gas in the liquid phase compared to not setting the fixed block 83 and the swirl blade 84.

[0034] In addition, after the fluid hits the swirl blade 84, since the swirl blade 84 has a certain inclination angle, the fluid has a certain thrust on the swirl blade 84, so that the swirl blade 84 rotates around the fixed block 83, and the gas-liquid mixing effect is better.

[0035] There is no special requirement for the structure of the fixing block 83 in the present application, as long as it can be used to fix the swirl blades 84 and can drive the swirl blades 84 to slide. In the present application, the fixing block 83 moves along the axial direction. In fact, it can also have a certain angle with the axial direction, as long as it is not completely radial and has a certain axial component.

[0036] Furthermore, a slide rod 85 is disposed in the cylinder 81 in this embodiment, at least one end of the slide rod 85 is fixed on the cylinder 81 , and the fixing block 83 is sleeved on the slide rod 85 .

[0037] The slide bar 85 in this embodiment can be arranged along the axial direction of the cylinder 81, or can be slightly inclined. Although the slide bar 85 arranged along the radial direction can also cause the gas to collide with the fixed block 83, which is conducive to the dispersion of the gas in the liquid phase compared to not setting the fixed block 83, the fixed block 83 cannot slide and oscillate under the action of the gas, and the dispersion effect is not as good as that of the inclined setting of the slide bar 85. If the slide bar 85 is not set, the force-bearing surface of the fixed block 83 can be set to a concave cone in the box, but the stability is relatively poor.

[0038] In this embodiment, a stirring zone may be provided at the outlet of the cylinder 81 to improve the mixing effect, or a stirring zone may not be provided.

[0039] In this embodiment, at least one end of the slide bar 85 needs to be fixed in the cylinder 81, and the fixing method can be through a connecting rod or a connecting block or any other structure. In addition, in order to prevent the fixed block 83 from detaching from the slide bar 85, the slide bar 85 can be fixed on the cylinder 81 at one end, and a stop block is provided at the other end to prevent the fixed block 83 from falling off. There are no special requirements for the shape and size of the stop block, as long as the stop block cannot pass through the through hole in the middle of the fixed block 83. In addition, the stop block can also be extended so that the other end of the stop block is also fixed on the inner wall of the cylinder 81, so that both ends of the slide bar 85 are fixed on the inner wall of the cylinder 81, and the structure of the slide bar 85 is more stable.

[0040] Furthermore, in this embodiment, a collecting cover 86 is provided at the lower end of the cylinder 81, the air outlet of the air inlet pipe 82 is located in the collecting cover 86, and a liquid phase channel is provided between the collecting cover 86 and the air outlet.

[0041] During the intake of air through the intake pipe 82, negative pressure is generated near the intake port, and the setting of the collecting cover 86 is conducive to the liquid being concentrated in the collecting cover 86 and entering the cylinder 81 with the intake air. The intake pipe 82 in this embodiment can be connected to a compressor, and the intake amount of the gas can be adjusted by adjusting the compressor.

[0042] Furthermore, in this embodiment, at least one sudden change section 88 is provided on the cylinder 81 around the fixing block 83 , and the inner diameters of the cylinder 81 on both sides of the sudden change section 88 are different.

[0043] By adjusting the air intake to adjust the flow rate through the cylinder 81, the fixed block 83 can be vibrated. However, since the change of the flow rate is continuous and gradual, the vibration of the fixed block 83 is relatively stable. In order to make the vibration of the fixed block 83 more intense, a sudden change section 88 is set in the cylinder 81, so that the inner diameter of the cylinder 81 suddenly, regularly or irregularly increases or decreases, thereby causing a sudden change in the flow rate of the fluid and a sudden change in the lifting force of the vibration block, thereby causing the speed of the vibration block to rise or fall. Among them, the inner diameter of the cylinder 81 is preferably increased and decreased alternately.

[0044] In this embodiment, a gas dispersing member may be provided on the surface of the fixing block 83 facing the air inlet pipe 82 .

[0045] The gas breaking piece in this embodiment can be an irregular protrusion, a breaking rod, or other structures. It mainly disperses the gas into smaller bubbles through the collision between the gas and the gas breaking piece, thereby increasing the gas-liquid contact area.

[0046] Furthermore, the cross-section of the fixing block 83 in this embodiment gradually increases in a direction away from the air inlet pipe 82 .

[0047] The cross section of the fixed block 83 is gradually increased, and can be matched with the setting of the sudden change cross section 88, so that when the gas flow rate remains stable within a range, the fixed block 83 can also vibrate continuously. Compared with adjusting the gas flow rate, this saves more energy consumption, and because the power of the air compressor that adjusts the gas flow rate is relatively stable, it is also conducive to extending the life of the air compressor.

[0048] Furthermore, an elastic member 87 is provided on a side of the fixing block 83 away from the air inlet pipe 82 in this embodiment.

[0049] The elastic member 87 can be made of rubber or spring, or other elastic pad materials. When the air intake pipe 82 starts to take in air, there may be errors in the gas flow control, resulting in excessive or insufficient gas flow. When the gas flow is too large, a large upward lifting force will be applied to the fixed block 83, causing the fixed block 83 to move upward quickly, which may collide with the fixed structure or the limiter at the upper end of the slide bar 85. Long-term, multiple, and strong collisions may damage the fixed block 83 or the connecting structure or the fiber parts, shortening the life of the equipment. Therefore, the elastic member 87 is provided to reduce the probability of equipment damage.

[0050] In addition, the elastic member 87 can store energy. Under normal circumstances, the force of the fixed block 83 moving downward will not be greater than the gravity. However, with the addition of the elastic member 87, the energy stored in the elastic member 87 may be released when the fixed block 83 descends, giving the fixed block a downward thrust, thereby increasing the downward speed of the fixed block 83 and increasing the collision speed between the fixed block 83 and the gas, which is beneficial to the dispersion of the gas.

[0051] In this embodiment, each group of swirl blades 84 may be provided with a corresponding fixing ring, and each of the swirl blades 84 is fixed to the corresponding fixing ring to improve the stability of the device.

[0052] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A sewage treatment equipment for energy saving and consumption reduction, comprising an anoxic tank (1), an aerobic tank (2) and a secondary clarification tank (3) arranged in sequence, characterized in that: The invention also comprises an external return pipe (4), an internal return pipe (5), a first return pipe (6) and a second return pipe (7); the inlet of the external return pipe (4) is located in the aerobic tank (2) and is connected to a water pump, and the outlet of the external return pipe (4) is located in the anoxic tank (1); the inlet end of the internal return pipe (5) is connected to the external return pipe (4), and the outlet end is located in the aerobic tank (2) and is connected to an aerator (8); the inlets of the first return pipe (6) and the second return pipe (7) are respectively located in the aerobic tank (2) and the second clarification tank (3), and the outlets are both connected to the external return pipe (4); a mixer (9) is provided at the connection between the external return pipe (4) and the first return pipe (6) and the second return pipe (7); the aerator (8) comprises a cylinder (81) and an air inlet pipe (12) provided at one end of the cylinder (81); 82), a fixed block (83) capable of moving axially along the cylinder (81) is arranged in the cylinder (81), and a swirl blade (84) is arranged on the fixed block (83) for driving the fixed block (83) to rotate; a slide rod (85) is arranged in the cylinder (81), at least one end of the slide rod (85) is fixed to the cylinder (81), and the fixed block (83) is sleeved on the slide rod (85); a flow collecting cover (86) is arranged at the lower end of the cylinder (81), the air outlet of the air inlet pipe (82) is located in the flow collecting cover (86), and a liquid phase channel is arranged between the flow collecting cover (86) and the air outlet; at least one sudden change section (88) is arranged on the cylinder (81) around the fixed block (83), and the inner diameters of the cylinder (81) on both sides of the sudden change section (88) are different.

2. The energy-saving and consumption-reducing sewage treatment equipment according to claim 1 is characterized in that: The cross-section of the fixing block (83) gradually increases in a direction away from the air inlet pipe (82).

3. The energy-saving and consumption-reducing sewage treatment equipment according to claim 1 is characterized in that: An elastic member (87) is provided on a side of the fixing block (83) away from the air inlet pipe (82).

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