L-shaped aeration device convenient to overhaul for sewage treatment plant

Abstract

The utility model relates to the field of sewage treatment, in particular to a convenient-to-overhaul L-shaped aeration device for a sewage treatment plant, which comprises an aeration pipe and a dredging pipe, an aeration main pipe is connected with an aeration tank, an aeration branch pipe is arranged on the aeration main pipe, a plurality of L-shaped aeration branch pipes are mechanically connected onto the aeration branch pipe, and the L-shaped aeration branch pipes are communicated with the dredging pipe. The tail parts of the L-shaped aeration branch pipes are connected with the dredging pipes, and each L-shaped aeration branch pipe is provided with the L-shaped pipe frame, so that the L-shaped aeration branch pipes can be pulled out of the aeration tank to be overhauled by lifting the pipe frames during use, the sewage treatment efficiency of a factory is not influenced, and meanwhile, the L-shaped aeration branch pipes are easy to replace and mount.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to an L-shaped aeration device which is easy to maintain and is used in a sewage treatment plant. Background Art

[0002] Aeration tanks are a key component in sewage treatment systems and are primarily used to increase dissolved oxygen in water through the aeration process to support the growth and activity of aerobic microorganisms, thereby degrading organic pollutants in sewage.

[0003] Increasing the dissolved oxygen concentration in sewage is usually achieved by installing aeration pipes in the aeration tank. The aeration pipes are laid at the bottom of the aeration tank. This layout can optimize the contact between sewage and air, improve the efficiency of oxygen transfer, and help prevent suspended objects in the tank from sinking, and strengthen the contact between organic matter and microorganisms and dissolved oxygen.

[0004] The sewage in the aeration tank contains a large amount of silt, and flocculants are mixed during the treatment process, which often leads to blockage of the aeration pipes. Since the aeration pipes are laid at the bottom of the aeration tank, once the aeration pipes are blocked, the entire aeration tank needs to be shut down, and the sewage in the tank needs to be discharged for cleaning and maintenance. This process will not only affect the sewage treatment efficiency, but also consume a lot of manpower and the maintenance of the aeration pipes after long-term use.

[0005] Patent CN208234614U discloses a perforated aeration device that is resistant to fouling and blockage, including an air supply pipe and an aeration pipe: the air supply pipe is vertically arranged on one side of the aeration pipe, a perforation is arranged at the bottom of the aeration pipe, and a plurality of mud discharge pipes with openings facing downward are arranged on the aeration pipe. By adding aeration holes and mud discharge pipes to the aeration pipe, this is also a common method for increasing the aeration volume and solving the problem of aeration pipe blockage.

[0006] However, when the aeration tank has a larger treatment area, the laying of the aeration pipes in the aeration tank should not be too complicated. In addition, granular fillers are added to the aeration tank. Although the combination of aeration holes and mud discharge pipes can reduce the frequency of aeration pipe blockage, it cannot completely eliminate the blockage of the aeration pipe. After long-term use, the aeration pipe still needs to be inspected and repaired. Even if the technical solution disclosed in patent CN208234614U is used, the aeration tank still needs to be shut down when the aeration pipe is inspected and repaired, and the tank must be cleaned before inspection.

[0007] During the renovation of the sewage treatment plant, the applicant discovered that uneven aeration was prone to occur on the surface of an aerobic pool that had been in operation for a period of time. At this time, the dissolved oxygen in the pool was detected to be lower than 1 mg / L. In order to increase the dissolved oxygen content in the pool, the sewage treatment plant increased the frequency of fan operation. The fan had experienced multiple high-pressure alarm shutdowns. Various signs indicated that the original aeration pipes were severely clogged after long-term use, and it was necessary to stop production and drain the mud-water mixture in the biochemical system before repairing or replacing the aeration pipes. However, the site did not have the conditions to stop water for maintenance.

[0008] It is not uncommon for sewage treatment plants to encounter such situations. Therefore, there is a need for an aeration device that can be maintained together with the sewage treatment plants. Once blockage occurs, the staff can deal with the aeration pipe at the blocked part in time without cleaning the pool, which will not affect the sewage treatment efficiency. At the same time, it can also meet the needs of regular maintenance of the aeration device and minimize the possibility of aeration pipe blockage. Utility Model Content

[0009] In order to solve the problems mentioned in the background technology and overcome the above shortcomings, the utility model provides the following technical solutions:

[0010] The present application is an L-shaped aeration device for easy maintenance in a sewage treatment plant, wherein the L-shaped aeration device comprises an aeration pipe, a dredging pipe, and a pipe rack.

[0011] Specifically, the aeration pipe is divided into an aeration main pipe, an aeration branch pipe and an L-shaped aeration branch pipe; the aeration main pipe is connected to the aeration tank, a plurality of aeration branch pipes are branched from the aeration main pipe, and an L-shaped aeration branch pipe is branched under each aeration branch pipe, and is fixed mechanically, such as in the form of a flange, so as to facilitate the replacement of a single L-shaped aeration branch pipe; a plurality of aeration through holes arranged in a staggered manner are provided on the transverse pipe of each L-shaped aeration branch pipe;

[0012] Furthermore, the aeration main pipe is a DN200 pipe, and the aeration branch pipe is a DN80 pipe;

[0013] Furthermore, the spacing between the several L-shaped aeration branch pipes on each aeration branch pipe is 200 mm, and a safety regulating valve is provided on the L-shaped aeration branch pipe to accurately control the aeration dosage;

[0014] Furthermore, each aeration branch pipe is provided with four L-shaped aeration branch pipes;

[0015] Furthermore, the diameter of the aeration holes is 3 mm, and each of the L-shaped aeration branches is provided with 30 aeration holes.

[0016] Each of the L-shaped aeration branch pipes is individually connected to a dredging pipe for dredging the sludge in the pipeline. A sludge discharge valve is installed on each of the dredging pipes, and the sludge discharge valve is fixed with a clamp;

[0017] Furthermore, the silt discharge valves are arranged on one side of the corridor with their backs facing away, so as to facilitate operation by personnel.

[0018] A pipe rack needs to be installed outside each L-shaped aeration branch pipe. The installed pipe rack is an L-shaped pipe rack that matches the L-shaped aeration branch pipe. After the pipe rack is placed according to the position of the L-shaped aeration branch pipe, it is rotated 45° counterclockwise to fix the L-shaped aeration branch pipe outside the pipe rack, and the tail end of the L-shaped aeration branch pipe is fixed to the pipe rack by a chain. The number of the pipe racks is the same as the number of the L-shaped aeration branch pipes.

[0019] When an L-type aeration branch pipe is blocked or needs to be repaired, the entire group of L-type aeration branch pipes can be pulled out of the sewage through the pipe rack, without the need to clean the pool and without affecting the continued aeration of other groups of L-type aeration branch pipes.

[0020] In actual application, a hole can be directly opened on the aeration main pipe connected to the aerobic tank, and an idle aeration branch pipe is first connected, and then an L-shaped aeration branch pipe is connected to the aeration branch pipe to form a new aeration device. Each aeration branch pipe and all the L-shaped aeration branches and pipe frames connected to the flanges on it form a group. Several groups are provided in this form in the entire aeration tank. Such a design uses the several L-shaped aeration branches to share the pressure of the aeration main pipe, reduces the probability of blockage of the aeration main pipe and the aeration branch pipe, and also helps to make the aeration in the aeration tank more uniform and reduce the operating pressure of the fan.

[0021] When the aeration pipe is blocked, the pipe rack at the blocked part can be pulled up separately, the L-shaped aeration branch pipe at the blocked part can be inspected and the cement mixture in the L-shaped aeration branch pipe can be cleared; when inspecting, if only one or a small number of L-shaped aeration branch pipes are blocked and can only be replaced, these L-shaped aeration branch pipes can be unscrewed separately and replaced with new L-shaped aeration branch pipes, saving production costs; if the entire group of L-shaped aeration branch pipes are seriously blocked, a new group of aeration branch pipes and L-shaped aeration branch pipes can be directly replaced. The whole inspection process is safe and fast, and only 2-4 operators need to cooperate with each other to complete it.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. The present application is an L-shaped aeration device for easy maintenance in a sewage treatment plant. The existing aeration devices have been basically improved in terms of aeration, but the problem of difficulty in the later maintenance of the aeration device has been ignored. The aeration tanks of the sewage treatment plant are basically in a state of circulating work. It is very necessary to regularly inspect and troubleshoot the aeration device under a long-term operating environment. Therefore, in the present application, in addition to changing the connection structure relationship between different aeration pipes, a separate L-shaped pipe rack is also provided for the L-shaped aeration branch pipe that penetrates into the bottom of the aeration tank. Whether it is installation or maintenance, a group of L-shaped aeration branch pipes can be lifted out of the aeration tank by the pipe rack and repaired separately, which will not affect the work of other aeration pipelines, thereby not affecting the sewage treatment efficiency, and saving manpower. Because it is easy to install and only 2 to 4 workers are needed for maintenance, they do not need to enter dangerous areas such as aeration tanks. They only need to remove the bolts to inspect and install the work, which can save construction time and reduce safety hazards. Such regular maintenance can also increase the service life of the aeration device and reduce costs.

[0024] 2. The L-shaped aeration branch pipe shares the aeration pressure of a single aeration main pipe. It is equipped with aeration holes and safety regulating valves, which can accurately control the aeration dosage. The aeration branch pipe is connected to the L-shaped aeration branch pipe by a flange. When a certain L-shaped aeration branch pipe is blocked, the L-shaped aeration branch pipe can be directly unscrewed and backwashed with high-pressure gas or liquid. It is convenient, fast and easy to operate and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the front view of the L-shaped aeration device of the utility model;

[0026] Figure 2 This is a schematic diagram of the position relationship between the L-shaped aeration branch pipe and the pipe rack of the utility model;

[0027] Figure 3 This is a schematic diagram of the cross section of the L-shaped aeration branch pipe of the utility model;

[0028] 1- aeration main pipe, 2- aeration branch pipe, 3- L-type aeration branch pipe, 4- dredging pipe, 5- drainage valve, 6- L-type pipe rack, 7- aeration through hole. DETAILED DESCRIPTION

[0029] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0031] Example 1: Single aeration tube blockage

[0032] Usually, a sewage treatment plant connects an aeration main pipe 1 to an aerobic tank, and a dredging pipe 4 is added at the tail of the aeration main pipe 1 to prevent the aeration main pipe 1 from being blocked. At the same time, an aeration through hole 7 is provided on the aeration main pipe 1 for aeration. Although such a design helps the aeration main pipe 1 to discharge sludge and other debris in the pipe by adding the dredging pipe 4, the aeration main pipe 1 is arranged at the bottom of the aeration tank as the main aeration pipeline, and it is inevitable that blockage will still occur. When performing maintenance, the entire aeration tank needs to be closed and the tank needs to be cleaned before inspection and maintenance can be carried out, which is very inconvenient.

[0033] like Figure 1 , is the L-type aeration device of the present application, in which the aeration main pipe 1 is still connected to the aerobic tank, but a plurality of aeration branch pipes 2 are branched out from it, and each aeration branch pipe 2 is provided with 4 L-type aeration branch pipes 3, and the tail ends of the L-type aeration branch pipes 3 are respectively connected to dredging pipes 4, and the dredging pipes 4 are also separately provided with silt discharge valves 5.

[0034] like Figure 3 As shown, each of the L-shaped aeration branch pipes 3 is provided with 30 aeration holes 7 on the transverse pipe.

[0035] like Figure 2 As shown, each L-shaped aeration branch pipe 3 is provided with a matching L-shaped pipe rack 6, the L-shaped pipe rack 6 is L-shaped, the L-shaped pipe rack 6 is rotated 45° counterclockwise in the horizontal direction, and the L-shaped aeration branch pipe 3 and the L-shaped pipe rack 6 are fixed with a chain.

[0036] Such a design shares the aeration pressure of the aeration main pipe 1 and the aeration branch pipe 2. The L-shaped aeration branch pipe 3 goes deep into the bottom of the aeration tank, and aerates the aeration tank mainly through the aeration holes 7 on the transverse branches of the L-shaped aeration branch pipe 3, while also reducing the operating pressure of the fan.

[0037] When the L-shaped aeration branch pipe 3 is blocked, the blocked L-shaped aeration branch pipe 3 can be removed separately, connected to the cleaning equipment, the cement mixture inside can be removed, and the tail discharge valve can be opened for flushing. After cleaning, it can be fixed to the aeration branch pipe 2 through the flange, or a new L-shaped aeration branch pipe 3 can be directly replaced and fixed to the aeration branch pipe 2 through the flange.

[0038] Example 2: Inspection and installation of aeration tube group

[0039] When the sewage treatment plant is renovated or repaired, holes can be directly opened on the aeration main pipe 1 and installed in groups.

[0040] like Figure 1As shown, a plurality of aeration branch pipes 2 are branched from the original aeration main pipe 1, and each aeration branch pipe 2 is provided with four L-shaped aeration branch pipes 3, and the tail ends of the L-shaped aeration branch pipes 3 are respectively connected to dredging pipes 4, and the dredging pipes 4 are also individually provided with a blood-discharge valve 5, as shown in FIG. Figure 1 As shown, one aeration branch pipe 2 and the four L-shaped aeration branch pipes 3 form a group, and the same combination can be arranged in several groups on the aeration main pipe 1.

[0041] like Figure 3 As shown, each of the L-shaped aeration branch pipes 3 is provided with 30 aeration holes 7 on the transverse pipe.

[0042] like Figure 2 As shown, a matching L-shaped pipe rack 6 is provided on each L-shaped aeration branch pipe 3, and the L-shaped pipe rack 6 is L-shaped. The L-shaped pipe rack 6 is rotated 45° counterclockwise in the horizontal direction, and the L-shaped aeration branch pipe 3 and the L-shaped pipe rack 6 are fixed with a chain. The L-shaped pipe rack 6 is the same as the L-shaped aeration branch pipe 3, and every 4 L-shaped pipe racks 6 form a group, and different groups are connected by chains to play a fixing role.

[0043] During the installation process, the aeration branch pipe 2 can be installed together with the L-shaped aeration branch pipe 3 and the dredging pipe 4 and L-shaped pipe rack 6 thereon in groups, so that the replacement is more convenient while maintaining the original sewage treatment plant structure as much as possible.

[0044] When performing maintenance, the entire group of pipes can be pulled out of the aeration tank by pulling up the L-shaped pipe rack 6 according to the grouping, and the aeration branch pipe 2, the L-shaped aeration branch pipe 3 and the dredging pipe 4 thereon can be maintained. During the maintenance process, there is no need to clean the tank, and the work of the aeration branch pipe 2 and the L-shaped aeration branch pipe 3 and the dredging pipe 4 thereon of other groups will not be affected. The maintenance can be completed by the cooperation of 2-4. After the maintenance is completed, the L-shaped aeration branch pipe 3 is put back below the water surface by pulling the L-shaped pipe rack 6 to continue working, and the L-shaped pipe rack 6 is fixed to the aeration tank by a chain to prevent the L-shaped aeration branch pipe 3 from being displaced when a large amount of water enters the aeration tank.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An L-shaped aeration device for easy maintenance in a sewage treatment plant, characterized in that: The invention comprises an aeration main pipe (1) connected to an aeration tank, a plurality of aeration branch pipes (2) branching out from the aeration main pipe (1), and an L-shaped aeration branch pipe (3) branching out from each aeration branch pipe (2) and fixed mechanically. A pipe rack is also installed on each L-shaped aeration branch pipe (3), and the pipe rack is an L-shaped pipe rack (6) matched with the L-shaped aeration branch pipe (3); and a dredging pipe (4) is also separately connected to the tail of the L-shaped aeration branch pipe (3).

2. The L-shaped aeration device for easy maintenance in a sewage treatment plant as claimed in claim 1, characterized in that: After the L-shaped pipe rack (6) is arranged according to the position of the L-shaped aeration branch pipe (3), it is rotated 45° counterclockwise to fix the L-shaped aeration branch pipe (3) outside the L-shaped pipe rack (6), and the tail end of the L-shaped aeration branch pipe (3) is fixed to the L-shaped pipe rack (6) in a chain manner.

3. The L-shaped aeration device for easy maintenance in a sewage treatment plant as claimed in claim 1, characterized in that: The aeration main pipe (1) is a DN200 pipe, the aeration branch pipe (2) is a DN80 pipe, and the spacing between the plurality of L-shaped aeration branch pipes (3) arranged on each aeration branch pipe (2) is 200 mm.

4. The L-shaped aeration device for easy maintenance in a sewage treatment plant as claimed in claim 3, characterized in that: Each of the aeration branch pipes (2) is provided with four L-shaped aeration branch pipes (3).

5. The L-shaped aeration device for easy maintenance in a sewage treatment plant as claimed in claim 4, characterized in that: The aeration branch pipe (2) and the L-shaped aeration branch pipe (3) are fixed via flanges.

6. The L-shaped aeration device for easy maintenance in a sewage treatment plant as claimed in claim 1, characterized in that: A plurality of staggered aeration through holes (7) are provided on the transverse pipeline of the L-shaped aeration branch pipe (3).

7. The L-shaped aeration device for easy maintenance in a sewage treatment plant as claimed in claim 6, characterized in that: The diameter of the aeration through hole (7) is 3 mm, and each of the L-shaped aeration branch pipes (3) is provided with 30 aeration through holes (7).

8. The L-shaped aeration device for easy maintenance in a sewage treatment plant as claimed in claim 1, characterized in that: The L-shaped aeration branch pipe (3) is provided with a safety regulating valve.

9. The L-shaped aeration device for easy maintenance in a sewage treatment plant as claimed in claim 1, characterized in that: A silt discharge valve is respectively installed on the dredging pipe (4), and the silt discharge valve is fixed by a clamp.

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