Clean gas stripping water production device for SBR (sequencing batch reactor) process

Abstract

The utility model is applicable to the technical field of sewage treatment equipment, and particularly relates to a clean gas stripping water production device for an SBR (sequencing batch reactor) process, which comprises a sewage pool, a U-shaped pipe is arranged in the sewage pool, one end of the U-shaped pipe is connected with a first drainage pipe, and the other end of the U-shaped pipe is connected with a second drainage pipe; the outer side of the first drainage pipe is connected with an air injection pipe, and the end, away from the first drainage pipe, of the air injection pipe is connected with a first ventilation hose. According to the utility model, sludge and other suspended matters can be effectively prevented from entering a drainage system in aeration and stirring processes, and the turbid phenomenon at the initial stage of water production is avoided. Meanwhile, the air weir is arranged to form a gas isolation area in a sewage treatment stage, so that the dirt is prevented from entering a water production pipeline, and the purity of the supernate during drainage is ensured. By means of the design, the discharging efficiency of supernate is greatly improved, cleanliness of a water production pipeline is guaranteed, and then the water outlet quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a clean air stripping water production device for an SBR process. Background Art

[0002] In the field of sewage treatment, the SBR (sequencing batch reactor) process is widely used in the treatment of municipal and industrial sewage due to its flexible operation, small footprint, and good treatment effect. The SBR process generally includes steps such as water intake, aeration, biochemical reaction, sedimentation, and drainage. After the biochemical reaction is completed, the settled sludge will accumulate at the bottom of the reactor, and the supernatant will form a relatively clear water body in the upper layer. However, since the aeration and stirring process may cause sludge or suspended matter to mix into the supernatant, especially in the early stage of drainage, the water quality often becomes turbid and substandard, which in turn affects the overall effluent effect. This situation requires additional filtration or pre-drainage operations to ensure that the effluent water quality meets the standards.

[0003] In the prior art, a pre-drainage pipe is usually installed in the water production device to discharge the initially produced water containing suspended solids into a sludge pool, thereby reducing the sludge content entering the subsequent treatment process and ensuring the water quality of the subsequent effluent. However, this type of pre-drainage method has many problems in actual application. First, the sewage is highly disturbed during the pre-drainage process, which makes the sludge easily suspended again, aggravating the turbidity of the initial drainage. Secondly, problems such as gas leakage and pipe blockage can easily lead to reduced water production efficiency and frequent equipment maintenance, increasing operating costs.

[0004] Therefore, the main drawbacks of existing technologies are that during the aeration and mixing process, it is often difficult to prevent sludge or suspended matter from entering the drainage system during the initial drainage process. This results in a high suspended solids content in the produced water, unstable effluent quality, and difficulty maintaining equipment cleanliness, requiring frequent maintenance and cleaning. These issues not only reduce the quality of the produced water but also adversely affect the continuous operation of the sewage treatment system, limiting the application of the SBR process in scenarios with high water quality requirements. Utility Model Content

[0005] The purpose of the embodiment of the present utility model is to provide a clean gas stripping water production device for the SBR process, aiming to solve the technical problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A clean air stripping water production device for an SBR process includes a sewage pool, wherein a U-shaped pipe is provided inside the sewage pool, and one end of the U-shaped pipe is connected to a first drain pipe, and the other end of the U-shaped pipe is connected to a second drain pipe;

[0008] An air injection pipe is connected to the outside of the first drain pipe, and an end of the air injection pipe away from the first drain pipe is connected to a first ventilation hose, one end of the first ventilation hose is installed with a first air valve, an air pump is installed on the side of the sewage pool, and one end of the air pump is provided with an air supply pipe;

[0009] The end of the second drain pipe away from the U-shaped pipe is connected to a three-way joint, and the two ends of the three-way joint away from the second drain pipe are respectively connected to a water pump pipe and a second ventilation hose, and the end of the second ventilation hose away from the three-way joint is installed with a second air valve.

[0010] Furthermore, the length of the first drain pipe is greater than the length of the second drain pipe.

[0011] Furthermore, a drainage head is installed at one end of the first drainage pipe away from the U-shaped pipe.

[0012] Furthermore, one end of the air supply pipe away from the air pump is connected to the first air valve.

[0013] Furthermore, an intelligent controller is installed on the side of the sewage pool, and the intelligent controller is electrically connected to the air pump, the first air valve and the second air valve.

[0014] The clean air stripping water production device for the SBR process provided by the utility model has the following beneficial effects:

[0015] This design effectively prevents sludge and other suspended matter from entering the drainage system during the aeration and mixing process, thus avoiding turbidity in the initial water production phase. Furthermore, the air weir creates an air isolation zone during the wastewater treatment phase, preventing contaminants from entering the production water pipeline, thereby ensuring the purity of the supernatant during drainage. This design significantly improves the efficiency of supernatant discharge, ensuring the cleanliness of the production water pipeline, and ultimately enhancing the effluent quality. Furthermore, maintaining pipeline cleanliness reduces the frequency of cleaning and maintenance, thereby improving the overall operational reliability and efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the clean gas stripping water production device used in the SBR process.

[0017] Figure 2 This is a structural schematic diagram of the clean gas lift water production device used in the SBR process in a high liquid level state.

[0018] In the figure: 1. Sewage tank; 2. Air pump; 3. First air valve; 4. Drain head; 5. Second air valve; 6. First ventilation hose; 7. Second ventilation hose; 8. First drain pipe; 9. Second drain pipe; 10. T-joint; 11. Water pump; 12. Air injection pipe; 13. U-shaped pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to 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.

[0020] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0021] like Figure 1 and Figure 2 As shown, the clean air stripping water production device for the SBR process provided by the present invention includes a sewage tank 1, and a U-shaped pipe 13 is provided inside the sewage tank 1. One end of the U-shaped pipe 13 is connected to a first drain pipe 8, and the other end of the U-shaped pipe 13 is connected to a second drain pipe 9. The length of the first drain pipe 8 is longer than the second drain pipe 9, and the specific lengths of the first drain pipe 8 and the second drain pipe 9 can be adjusted according to production requirements. Preferably, the length of the first drain pipe 8 is twice as long as the second drain pipe 9 or more.

[0022] An air injection pipe 12 is connected to the outside of the first drain pipe 8, and the end of the air injection pipe 12 away from the first drain pipe 8 is connected to the first ventilation hose 6. A first air valve 3 is installed at one end of the first ventilation hose 6. An air pump 2 is installed on the side of the sewage tank 1, and an air supply pipe is provided at one end of the air pump 2. The end of the air supply pipe away from the air pump 2 is connected to the first air valve 3.

[0023] The end of the second drain pipe 9 away from the U-shaped tube 13 is connected to a three-way joint 10, and the two ends of the three-way joint 10 away from the second drain pipe 9 are respectively connected to a suction pipe 11 and a second ventilation hose 7, and the end of the second ventilation hose 7 away from the three-way joint 10 is installed with a second air valve 5.

[0024] In one embodiment of the present invention, before a new batch of sewage is discharged into the sewage pool 1, a certain amount of liquid is retained in the sewage pool 1, and the liquid level is set to "low liquid level before water inflow". At this time, the second air valve 5 is in an open state.

[0025] At the beginning of sewage treatment, the first and second air valves 3 and 5 are closed, and then new sewage is injected into the sewage tank 1. As the water level rises, it gradually overflows the tee joint 10 until it reaches below the port of the first drain pipe 8, reaching the "high liquid level before water production" set point. At this time, the sewage injection is stopped.

[0026] During the water filling process, when the water level overflows the tee joint 10, an "air weir" forms inside the tee joint 10 and the second drain pipe 9. This air weir creates a gas-isolated area within the tee joint and the second drain pipe as the water level rises. This prevents sewage from entering the second drain pipe 9 through the air weir, even if it is affected by aeration and agitation after reaching a high liquid level. This design ensures the cleanliness of the first drain pipe 8 and U-shaped tube 13, preventing them from being contaminated by turbid water generated by agitation.

[0027] After the sewage in the sewage tank 1 has been treated and settled for a predetermined period of time, the sludge settles to the bottom and a clear supernatant is formed on the top. At this time, the supernatant covers the port position of the pumping pipe 11. Then, the water production operation begins, and the steps are as follows:

[0028] 1. Eliminate the air weir: First, open the second air valve 5 to release the air in the air weir, allowing the air inside the three-way connector 10 and the second drain pipe 9 to be discharged, forming a smooth water flow channel. Then close the second air valve 5.

[0029] 2. Airlift Water Production: Start air pump 2 and open first air valve 3. Air pump 2 delivers gas through the air supply pipe to the first ventilation hose 6 and air injection pipe 12. Air injection pipe 12 injects gas into first drain pipe 8, where it is discharged through drain head 4. As the gas is discharged, a siphon effect is created, causing the supernatant to flow through pump pipe 11 into T-joint 10, then through second drain pipe 9, U-shaped pipe 13, and finally out of first drain pipe 8, completing the clean airlift water production operation.

[0030] When it is necessary to repeatedly process new sewage, it is only necessary to maintain the water level inside the sewage tank 1 at the "low liquid level before water inlet" and then repeat the above steps.

[0031] Through the above-mentioned technical solution, this device effectively prevents sludge and other suspended matter from entering the drainage system during the aeration and stirring processes, thus avoiding turbidity in the initial water production. Furthermore, the air weir creates an air isolation zone during the sewage treatment stage, preventing contaminants from entering the water production pipeline, thereby ensuring the purity of the supernatant during drainage. This design significantly improves the efficiency of supernatant discharge, ensuring the cleanliness of the water production pipeline, and thus enhancing the effluent quality. Furthermore, maintaining pipeline cleanliness reduces the frequency of cleaning and maintenance, thereby improving the overall operational reliability and efficiency of the equipment.

[0032] In this embodiment, a drain head 4 is installed at the end of the first drain pipe 8 away from the U-shaped tube 13. This design effectively controls the flow rate and direction of the drainage, mitigating disturbances during the gas lift process and preventing excessive agitation of the water. Furthermore, the drain head 4 reduces the negative pressure generated during the gas lift process, helping to stabilize the siphon effect and thereby ensuring smooth and continuous drainage of the produced water, improving the system's drainage efficiency and the operational stability of the equipment.

[0033] In this embodiment, an intelligent controller is installed on the side of the sewage tank 1 and is electrically connected to the air pump 2, the first air valve 3, and the second air valve 5. This intelligent controller enables automated control of the entire gas lift water production system. It precisely controls the opening and closing of the air valves and the activation of the air pumps based on pre-set programs or information fed back by the water level sensor, thereby reducing errors and time delays associated with manual operation. The intelligent controller also automatically adjusts equipment operating parameters based on water quality monitoring, enhancing system adaptability, improving overall control accuracy and efficiency, and providing a strong guarantee for the stability and reliability of produced water quality.

[0034] 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 and improvements 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 clean air stripping water production device for a SBR process, comprising a sewage tank (1), characterized in that: A U-shaped pipe (13) is provided inside the sewage tank (1), and one end of the U-shaped pipe (13) is connected to a first drainage pipe (8), and the other end of the U-shaped pipe (13) is connected to a second drainage pipe (9); The outer side of the first drainage pipe (8) is connected to an air injection pipe (12), and the end of the air injection pipe (12) away from the first drainage pipe (8) is connected to a first ventilation hose (6), one end of the first ventilation hose (6) is installed with a first air valve (3), and an air pump (2) is installed on the side of the sewage pool (1), and one end of the air pump (2) is provided with an air supply pipe; The end of the second drain pipe (9) away from the U-shaped pipe (13) is connected to a three-way joint (10), and the two ends of the three-way joint (10) away from the second drain pipe (9) are respectively connected to a water pumping pipe (11) and a second ventilation hose (7), and the end of the second ventilation hose (7) away from the three-way joint (10) is installed with a second air valve (5).

2. The clean air stripping water production device for SBR process according to claim 1, characterized in that, The length of the first drainage pipe (8) is greater than the length of the second drainage pipe (9).

3. The clean air stripping water production device for SBR process according to claim 1, characterized in that, A drainage head (4) is installed at one end of the first drainage pipe (8) away from the U-shaped pipe (13).

4. The clean air stripping water production device for SBR process according to claim 1, characterized in that, One end of the air supply pipe away from the air pump (2) is connected to the first air valve (3).

5. The clean air stripping water production device for SBR process according to claim 1, characterized in that, An intelligent controller is installed on the side of the sewage pool (1), and the intelligent controller is electrically connected to the air pump (2), the first air valve (3) and the second air valve (5).

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