Oxidation reactor for sewage treatment

Abstract

The utility model relates to the technical field of sewage treatment, and discloses an oxidation reactor for sewage treatment, which comprises a reaction kettle, a stirring assembly is arranged in the reaction kettle, the stirring assembly comprises a rotating shaft, one end of the rotating shaft is rotatably connected to the inner wall of the top of the reaction kettle, the bottom end of the rotating shaft is rotatably connected with a sleeve, and the sleeve is sleeved with a sleeve. The sleeve is fixedly connected to the inner wall of the bottom surface of the reaction kettle, a plurality of groups of stirring rods which are distributed in an array manner are rotationally connected to the side wall of the rotating shaft, and a plurality of groups of aeration holes which are distributed in an array manner are formed in the side wall of each stirring rod. According to the utility model, ozone gas enters the sleeve through the gas delivery pipe and then enters the rotating shaft through the sleeve. Due to the fact that the stirring rod is communicated with the interior of the rotating shaft, ozone gas can smoothly enter the stirring rod and is evenly released into sewage through the aeration holes in the side wall of the stirring rod, efficient utilization of the ozone gas in the sewage is guaranteed, and the sewage treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an oxidation reactor for sewage treatment. Background Art

[0002] Ozone advanced oxidation process has gradually gained favor among researchers in recent years. Under different reaction conditions, ozone can degrade organic matter such as aromatics and lignin through direct oxidation of ozone molecules and indirect oxidation by producing hydroxyl radicals. When using ozone oxidation, it is only necessary to control the concentration and flow rate of ozone gas introduced into the wastewater, and the gas-liquid reaction will not produce waste such as chemical sludge, which is easy to use and manage.

[0003] After searching, the Chinese patent announcement number: CN208716919U discloses an oxidation reactor for sewage treatment. By setting an aeration system at the bottom of the reactor body, ozone can be cut into extremely small ozone bubbles, so that ozone can be more fully mixed, contacted and reacted with sewage, which can effectively improve the utilization rate of ozone gas, improve the gas-liquid mixing efficiency of ozone and hydrogen peroxide, and pollutants can fully contact and react with ozone and hydrogen peroxide.

[0004] When the above reactor is in use, the aeration system generates very small ozone bubbles to improve efficiency, but bubbles will agglomerate or form dead zones during the rising process, affecting the effective contact between ozone and pollutants in sewage, thereby reducing treatment efficiency. Therefore, an oxidation reactor for sewage treatment is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides an oxidation reactor for sewage treatment, which aims to improve the aeration system in the prior art to produce extremely small ozone bubbles to improve efficiency, but the bubbles will agglomerate or form dead zones during the rising process, affecting the effective contact between ozone and pollutants in sewage.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an oxidation reactor for sewage treatment, comprising a reactor, a stirring assembly is arranged inside the reactor, the stirring assembly comprises a rotating shaft, one end of the rotating shaft is rotatably connected to the inner wall of the top of the reactor, the bottom end of the rotating shaft is rotatably connected to a sleeve, the sleeve is fixedly connected to the inner wall of the bottom surface of the reactor, a plurality of groups of stirring rods distributed in an array are rotatably connected to the side wall of the rotating shaft, and a plurality of groups of aeration holes distributed in a row are opened on the side wall of the stirring rod.

[0007] As a further description of the above technical solution:

[0008] The bottom surface of the reactor is provided with an air supply pipe and a drain port, and the bottom of the sleeve is connected with the air supply pipe.

[0009] As a further description of the above technical solution:

[0010] A motor is fixedly connected to the top of the reactor, and an output shaft of the motor penetrates and is rotatably connected to the inner wall of the reactor, and the output shaft of the motor is fixedly connected to the top of the rotating shaft.

[0011] As a further description of the above technical solution:

[0012] The inner walls of the stirring rod and the rotating shaft are both hollow, and the stirring rod and the interior of the rotating shaft are communicated with each other.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the stirring rod is fixedly connected with a plurality of array-distributed blades, and the end of the stirring rod is rotatably connected with a scraper.

[0015] As a further description of the above technical solution:

[0016] The top of the reactor is respectively provided with an inlet and an air outlet pipe.

[0017] As a further description of the above technical solution:

[0018] The bottom surface of the reactor is fixedly connected with four groups of symmetrically arranged supporting legs.

[0019] The utility model has the following beneficial effects:

[0020] 1. In the utility model, ozone gas enters the sleeve through the gas pipe, and then enters the interior of the rotating shaft through the sleeve. Since the stirring rod is connected to the interior of the rotating shaft, the ozone gas can smoothly enter the stirring rod and be evenly released into the sewage through the aeration holes on the side wall thereof, thereby reducing the agglomeration of bubbles or the formation of dead zones, ensuring the efficient use of ozone gas in sewage and improving the effect of sewage treatment.

[0021] 2. In the utility model, the blades on the outer wall of the stirring rod come into contact with the sewage and generate a rotational force, which enables the stirring rod to rotate by itself, so that the stirring rod can release ozone gas into the sewage more evenly, thereby improving the uniformity of the distribution of ozone gas in the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of an oxidation reactor for sewage treatment proposed by the utility model;

[0023] Figure 2 This is a cross-sectional structural schematic diagram of an oxidation reactor for sewage treatment proposed by the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of a stirring assembly of an oxidation reactor for sewage treatment proposed by the utility model;

[0025] Figure 4 The utility model is a schematic diagram of the stirring rod structure of an oxidation reactor for sewage treatment.

[0026] Legend:

[0027] 1. Reactor; 11. Inlet; 12. Air outlet pipe; 13. Air supply pipe; 14. Drainage outlet; 15. Support legs; 2. Stirring assembly; 21. Rotating shaft; 22. Sleeve; 23. Motor; 24. Stirring rod; 25. Aeration hole; 26. Blade; 27. Scraper. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Reference Figure 1 - Figure 2 The utility model provides an embodiment: an oxidation reactor for sewage treatment, comprising a reactor 1, the top of the reactor 1 is respectively provided with an inlet 11 and an outlet pipe 12, the inlet 11 is used to input sewage and hydrogen peroxide into the reactor 1, the outlet pipe 12 is used to discharge the gas after the reaction, and the bottom surface of the reactor 1 is provided with a gas supply pipe 13 and a drain port 14, the gas supply pipe 13 is used to transport ozone gas into the reactor 1. The drain port 14 is used to discharge the treated sewage. Four groups of symmetrically arranged support legs 15 are fixedly connected to the bottom surface of the reactor 1. The support legs 15 are used to provide stable support for the reactor 1.

[0030] Reference Figure 2 - Figure 3A stirring assembly 2 is arranged inside the reactor 1, and the stirring assembly 2 is used to mix and stir the sewage in the reactor 1, and make the ozone gas evenly distributed inside the reactor 1, so as to improve the utilization rate of the gas and the reaction efficiency. The stirring assembly 2 includes a rotating shaft 21, one end of which is rotatably connected to the inner wall at the top of the reactor 1, and the bottom end of the rotating shaft 21 is rotatably connected to a sleeve 22, and the sleeve 22 is fixedly connected to the inner wall of the bottom surface of the reactor 1, and the bottom of the sleeve 22 is interconnected with the gas pipe 13. The sleeve 22 and the inner wall of the reactor 1 ensure that the rotating shaft 21 can stably support the stirring assembly 2 and transmit power, and at the same time, the sleeve 22 connects the gas pipe 13 with the rotating shaft 21, allowing the ozone gas to enter the interior of the rotating shaft 21 from the gas pipe 13.

[0031] Reference Figure 2 - Figure 3 A motor 23 is fixedly connected to the top of the reactor 1, and the output shaft of the motor 23 penetrates and is rotatably connected to the inner wall of the reactor 1. The output shaft of the motor 23 is fixedly connected to the top of the rotating shaft 21, and a plurality of array-distributed stirring rods 24 are rotatably connected to the side wall of the rotating shaft 21. The function of the motor 23 is to drive the rotating shaft 21 to rotate, thereby driving the plurality of stirring rods 24 to mix and stir the sewage and hydrogen peroxide inside the reactor 1.

[0032] Reference Figure 3 - Figure 4 The stirring rod 24 and the inner wall of the rotating shaft 21 are both provided with a hollow shape, and the stirring rod 24 is connected to the inside of the rotating shaft 21. A plurality of aeration holes 25 distributed in a row are provided on the side wall of the stirring rod 24. Since the stirring rod 24 is connected to the inside of the rotating shaft 21, the ozone gas can enter the stirring rod 24 from the inside of the rotating shaft 21, thereby releasing the ozone gas into the sewage through the aeration holes 25. The outer wall of the stirring rod 24 is fixedly connected to a plurality of array-distributed blades 26, and the end of the stirring rod 24 is rotatably connected to a scraper 27. During the rotation of the stirring rod 24, the blades 26 contact with the sewage and rotate, thereby causing the stirring rod 24 to rotate itself, thereby improving the uniformity of the distribution of the ozone gas in the sewage, and cleaning the inner wall of the reactor 1 through the scraper 27.

[0033] Working principle:

[0034] When the motor 23 is started, its output shaft drives the shaft 21 to rotate in the reactor 1. As the shaft 21 rotates, the multiple groups of stirring rods 24 also rotate, and the sewage and hydrogen peroxide in the reactor 1 are fully mixed and stirred, which is conducive to the chemical reaction between the sewage and the hydrogen peroxide, so that the harmful substances in the sewage are more evenly oxidized.

[0035] At the same time, the ozone gas enters the sleeve 22 through the gas pipe 13, and then enters the interior of the rotating shaft 21 through the sleeve 22. Since the stirring rod 24 is connected to the interior of the rotating shaft 21, the ozone gas can smoothly enter the stirring rod 24 and be evenly released into the sewage through the aeration holes 25 on the side wall thereof, thereby ensuring the efficient use of the ozone gas in the sewage and further improving the sewage treatment effect.

[0036] During the rotation of the stirring rod 24, the blades 26 on its outer wall come into contact with the sewage and generate a rotational force, which enables the stirring rod 24 to rotate by itself, so that the stirring rod 24 can release ozone gas into the sewage more evenly, thereby improving the uniformity of distribution of ozone gas in the sewage.

[0037] In addition, the scraper 27 rotatably connected to the end of the stirring rod 24 continuously contacts the inner wall of the reactor 1 during the stirring process, scraping off the sediment or residue that may be attached to the inner wall, thereby preventing these substances from affecting the sewage treatment process.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oxidation reactor for sewage treatment, comprising a reactor (1), characterized in that: A stirring assembly (2) is arranged inside the reactor (1), and the stirring assembly (2) comprises a rotating shaft (21), one end of the rotating shaft (21) is rotatably connected to the inner wall of the top of the reactor (1), the bottom end of the rotating shaft (21) is rotatably connected to a sleeve (22), and the sleeve (22) is fixedly connected to the inner wall of the bottom surface of the reactor (1), and a plurality of groups of stirring rods (24) distributed in an array are rotatably connected to the side wall of the rotating shaft (21), and a plurality of groups of aeration holes (25) distributed in an array are provided on the side wall of the stirring rod (24).

2. The oxidation reactor for sewage treatment according to claim 1, characterized in that: The bottom surface of the reaction kettle (1) is provided with an air supply pipe (13) and a water discharge port (14), and the bottom of the sleeve (22) is in communication with the air supply pipe (13).

3. The oxidation reactor for sewage treatment according to claim 1, characterized in that: A motor (23) is fixedly connected to the top of the reaction kettle (1); an output shaft of the motor (23) penetrates through and is rotatably connected to the inner wall of the reaction kettle (1); and the output shaft of the motor (23) is fixedly connected to the top of the rotating shaft (21).

4. The oxidation reactor for sewage treatment according to claim 1, characterized in that: The inner walls of the stirring rod (24) and the rotating shaft (21) are both provided with a hollow shape, and the interiors of the stirring rod (24) and the rotating shaft (21) are communicated with each other.

5. The oxidation reactor for sewage treatment according to claim 1, characterized in that: The outer wall of the stirring rod (24) is fixedly connected to a plurality of groups of blades (26) distributed in an array, and the end of the stirring rod (24) is rotatably connected to a scraper (27).

6. The oxidation reactor for sewage treatment according to claim 1, characterized in that: The top of the reaction kettle (1) is respectively provided with an inlet (11) and an air outlet pipe (12).

7. The oxidation reactor for sewage treatment according to claim 1, characterized in that: Four groups of symmetrically arranged supporting legs (15) are fixedly connected to the bottom surface of the reaction kettle (1).

Images