A paddle mixer for sewage treatment

Abstract

The utility model discloses a paddle formula agitator for sewage treatment, including the bearing platform of installation in the top of sewage pool, the bearing platform periphery with sewage pool top lateral wall fixed connection, the bearing platform top is equipped with the motor, motor output shaft penetrates the bearing platform and is connected with the stirring shaft, the stirring shaft outer surface is provided with a plurality of groups of paddle assembly, the paddle assembly includes the paddle, the paddle is the curved shape arc blade, the paddle assembly still includes the scraper of setting up on the paddle and away from the stirring shaft one end, the utility model will this stirring paddle be applied to wastewater treatment, utilize the length gradient of stirring paddle paddle blade itself to carry out the shearing to the fluid, forms a good dissolved oxygen concentration gradient in the water body, and increases the turbulent degree of fluid, improves the activated sludge and promotes the mass transfer efficiency, speeds up the biochemical reaction rate.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a paddle mixer for wastewater treatment. Background Technology

[0002] To effectively promote water environment and water safety, it is necessary to develop and apply economical and effective denitrification technologies to improve denitrification efficiency and reduce water pollution. Introducing new structures and processes involves high construction costs and increased operating costs. Furthermore, due to limited plant area, it is impossible to add new structures. Therefore, improving and strengthening traditional water treatment processes is currently the most economical and effective means of controlling the quality of effluent from water plants, and it is also an important development trend in the treatment of slightly polluted water sources. In existing technologies, the treatment of ammonia nitrogen in wastewater using activated sludge processes can improve the utilization rate of ammonia nitrogen by microorganisms by adjusting the pH value within the treatment system. Under neutral or weakly alkaline conditions, most bacteria can use ammonia as a nitrogen source, thus utilizing ammonia nitrogen and reducing its concentration in the water. However, the traditional activated sludge process has low mass transfer efficiency and slow biochemical reactions. Utility Model Content

[0003] This utility model patent aims to address the shortcomings of the prior art by providing a paddle mixer for wastewater treatment, thereby solving the technical problems of low efficiency in treating ammonia nitrogen and low mass transfer efficiency in the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a paddle mixer for sewage treatment, including a support platform installed on the top of a sewage tank, the support platform being fixedly connected to the top side wall of the sewage tank around its perimeter, a motor being installed on the top of the support platform, the output shaft of the motor passing through the support platform and connected to a mixing shaft, a plurality of paddle assemblies being provided on the outer surface of the mixing shaft, the paddle assembly including paddle blades, the paddle blades being curved arc blades, the paddle assembly also including scrapers disposed on the paddle blades at the end away from the mixing shaft.

[0005] Preferably, the impeller includes an impeller body, which is elongated and fixedly connected to the stirring shaft on its side. The side of the impeller body away from the stirring shaft extends outward in a downward direction and bends in an arc shape. The bent section of the impeller body is fixedly connected to a scraper.

[0006] Preferably, a connecting plate is provided at the bottom of the motor, and bolts are provided on the connecting plate, which are fixedly connected to the support platform through the connecting plate.

[0007] Preferably, the motor output shaft is fixedly connected to the stirring shaft via a fixing plate, and the fixing plate is provided with several fastening bolts.

[0008] Preferably, a reinforcing rib is also provided between the motor output shaft and the fixing plate.

[0009] Preferably, a disc is also fixedly connected to the bottom of the blade assembly.

[0010] Preferably, the impeller assembly consists of eight sets arranged around the outer periphery of the stirring shaft.

[0011] Preferably, the motor output shaft passes through the bearing platform and is connected to the stirring shaft via a coupling.

[0012] Preferably, the disk is a hollow disk, and the top of the disk is fixedly connected to the bottom of the blade.

[0013] Preferably, the blades are made of stainless steel.

[0014] The beneficial effects of this utility model are: This invention applies the agitator to wastewater treatment, utilizing the length gradient of the agitator blades to shear the fluid, creating a favorable dissolved oxygen concentration gradient in the water body, increasing the turbulence of the fluid, improving the mass transfer efficiency of activated sludge, and accelerating the biochemical reaction rate. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view of the present invention; Figure 3 This is a top view of the present invention; Reference numerals: 1-Motor; 2-Support; 3-Agitator shaft; 4-Impeller; 5-Disc; 101-Connecting plate; 102-Reinforcing rib; 103-Fastening bolt; 104-Fixing plate; 401-Scraper; 402-Impeller body. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1-3As shown, a paddle mixer for wastewater treatment includes a platform 2 installed on top of a wastewater tank. The platform 2 is fixedly connected to the top sidewall of the wastewater tank. A motor 1 is installed on the top of the platform 2. The output shaft of the motor 1 passes through the platform 2 and is connected to a stirring shaft 3. Several sets of paddle assemblies are arranged on the outer surface of the stirring shaft. Each paddle assembly includes a blade 4, which is a curved arc-shaped blade. The paddle assembly also includes a scraper 401 disposed on the blade 4 away from the end of the stirring shaft 3. In this embodiment, the paddles are evenly arranged around the stirring shaft 3. The blades are curved arc-shaped blades with a long and wide lower edge that is vertically attached to the disc, a short and narrow upper edge, and sides fixed to the stirring shaft 3. When this mixing paddle is applied to wastewater treatment, the length gradient of the mixing paddle blade 4 itself is used to shear the fluid, forming a good dissolved oxygen concentration gradient in the water body, increasing the turbulence of the fluid, improving the mass transfer efficiency of activated sludge, and accelerating the biochemical reaction rate.

[0019] Preferably, the blade 4 includes a blade body 402, which is elongated and fixedly connected to the stirring shaft 3 on its side. The blade body 402 extends outward and bends in an arc shape on the side away from the stirring shaft 3. The bent section of the blade body 402 is fixedly connected to the scraper 401. In this embodiment, the length of the bottom edge of each blade 4 is 1.5 to 2 times the width of the disc; the length of the bottom edge of each blade is 1 / 4 to 1 / 3 of the length of the blade side edge.

[0020] Preferably, a connecting plate 101 is provided at the bottom of the motor 1, and bolts are provided on the connecting plate 101. The bolts pass through the connecting plate 101 and are fixedly connected to the support 2. In this embodiment, in order to fasten the motor 1, the motor 1 is first fixed on the connecting plate 101, and then fixedly connected to the support 2 by bolts passing through the support 2, thereby increasing the stability of the motor.

[0021] Preferably, the output shaft of the motor 1 is fixedly connected to the stirring shaft 3 via a fixing plate 104. The fixing plate 104 is provided with a plurality of fastening bolts 103. The output shaft of the motor 1 is fixedly connected to a connecting plate 104, and the top of the stirring shaft 3 is fixedly connected to a connecting plate 104. During installation, the two connecting plates 104 are fixed together by fastening bolts 103. During use, the output of the motor 1 drives the stirring shaft 3 to rotate.

[0022] Preferably, a reinforcing rib 102 is also provided between the output shaft of the motor 1 and the fixing plate 104.

[0023] Preferably, a disc 5 is also fixedly connected to the bottom of the blade assembly; in this embodiment, the diameter of the disc is 6 to 8 times the diameter of the stirring shaft, and the bottom of the blade 4 can be fixed to the top of the disc 5 by welding or gluing.

[0024] Preferably, the impeller assembly consists of eight sets arranged around the outer periphery of the stirring shaft 3.

[0025] Preferably, the output shaft of the motor 1 passes through the bearing 2 and is connected to the stirring shaft 3 via a coupling. In this embodiment, the motor output shaft and the stirring shaft 3 can also be fixed by a conventional coupling.

[0026] Preferably, the disk 5 is a hollow disk, and the top of the disk is fixedly connected to the bottom of the blade 4.

[0027] Preferably, the blade 4 is made of stainless steel.

[0028] The specific working method and principle of this application: The dissolved oxygen (DO) concentration gradient has a significant impact on the nitrification-denitrification nitrogen removal process. This is because nitrification and denitrification are two microbial processes with drastically different oxygen requirements. Nitrification requires a high concentration of dissolved oxygen, while denitrification requires a lower concentration. In actual wastewater treatment, efficient nitrification-denitrification nitrogen removal is usually achieved by controlling the dissolved oxygen concentration in stages. The length of the agitator blades in the flocculation tank affects the intensity of agitation of the water and also affects the oxygen-enriching capacity of the water. The longer the agitator blades, the stronger the oxygen-carrying capacity. The length gradient, spacing, and angle of the agitator blades will affect the oxygen content of the water. The dissolved oxygen concentration gradient is affected. Therefore, by modifying the structure of the agitator blade, a certain velocity gradient is formed during the agitation process, thereby carrying in different amounts of air along the diameter of the agitator blade, forming a good dissolved oxygen concentration gradient in the water. By reasonably controlling the dissolved oxygen concentration gradient, the nitrification and denitrification process can be optimized, thereby achieving the function of simultaneous nitrification, denitrification and nitrogen removal while enhancing coagulation, and improving the overall nitrogen removal efficiency. Therefore, in use, this application uses a traditional motor to drive the water flow through the extended agitator blade with an arc-shaped outer edge to form a good dissolved oxygen concentration gradient, thereby achieving the function of nitrification, denitrification and nitrogen removal.

[0029] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A paddle mixer for wastewater treatment, characterized in that: The system includes a support platform (2) installed on top of the sewage tank. The support platform (2) is fixedly connected to the top side wall of the sewage tank. A motor (1) is installed on the top of the support platform (2). The output shaft of the motor (1) passes through the support platform (2) and is connected to a stirring shaft (3). Several sets of blade assemblies are provided on the outer surface of the stirring shaft. Each blade assembly includes a blade (4). Each blade (4) includes a blade body (402). The blade body (402) is elongated. The sides of the blade body (402) are connected to the stirring shaft. The mixing shaft (3) is fixedly connected. The paddle body (402) extends outward in a downward direction away from the mixing shaft (3) and bends in an arc shape. The paddle assembly also includes a scraper (401) disposed on the paddle (4) away from the mixing shaft (3). The bent section of the paddle body (402) is fixedly connected to the scraper (401). A disc (5) is also fixedly connected to the bottom of the paddle assembly. The disc (5) is a hollow disc. The top of the disc (5) is fixedly connected to the bottom of the paddle (4).

2. The paddle mixer for sewage treatment according to claim 1, characterized in that: The motor (1) is provided with a connecting plate (101) at the bottom, and bolts are provided on the connecting plate (101). The bolts pass through the connecting plate (101) and are fixedly connected to the support (2).

3. A paddle mixer for wastewater treatment according to claim 2, characterized in that: The output shaft of the motor (1) is fixedly connected to the stirring shaft (3) through a fixing plate (104), and a number of fastening bolts (103) are provided on the fixing plate (104).

4. A paddle mixer for wastewater treatment according to claim 3, characterized in that: A reinforcing rib (102) is also provided between the output shaft of the motor (1) and the fixed plate (104).

5. A paddle mixer for wastewater treatment according to claim 1, characterized in that: The impeller assembly consists of eight sets arranged around the outer periphery of the stirring shaft (3).

6. A paddle mixer for wastewater treatment according to claim 1, characterized in that: The output shaft of the motor (1) passes through the bearing platform (2) and is connected to the stirring shaft (3) via a coupling.

7. A paddle mixer for wastewater treatment according to claim 1, characterized in that: The blade (4) is made of stainless steel.

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