Novel sludge concentration device

Abstract

The utility model discloses a novel sludge concentration device. The device comprises a pool body, the center of the top of the pool body is communicated with a sludge inlet pipe, a detachable submersible stirrer and a plurality of vertical aeration pipes are installed in the pool body, the submersible stirrer comprises a vertical rotating rod, a motor and a plurality of stirring fan blades, the rotating rod is installed in the center of the pool body, the motor is connected to the top end of the rotating rod, and the stirring fan blades are connected to the bottom end of the rotating rod. The plurality of stirring fan blades are connected to the bottom end of the rotating rod; the aeration pipes are connected with the rotating rod, are distributed around the rotating rod, and are communicated with the same air blower. According to the novel sludge concentration device, the movable stirrer and the aeration device are additionally arranged, so that not only can the concentration of sludge be realized, but also multifunctional treatment such as temporary storage, screening and activation of the sludge can be carried out, more comprehensive technical support is provided for the process operation of a sewage treatment plant, and the overall treatment capacity of the sewage treatment plant is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and in particular to a novel sludge thickening device. Background Technology

[0002] Gravity thickeners are commonly used sludge treatment facilities in municipal wastewater treatment plants. Their main principle is to thicken the sludge by utilizing the relative density difference between solid particles in the sludge and water. However, existing gravity thickener technologies have several drawbacks:

[0003] 1. Limited Functionality: Traditional gravity thickeners are mainly used for sludge thickening, but they do not have advanced functions such as sludge fermentation and sludge microbial cultivation.

[0004] 2. Limited concentration effect: For excess activated sludge, gravity concentration is often not ideal, and the moisture content can only be reduced from 99.2% to about 97%.

[0005] 3. High operating costs: Although the operating cost of gravity thickeners is relatively low, additional treatment steps may be required for certain types of sludge, which increases costs.

[0006] 4. Environmental impact: If the sludge stays in the thickening tank for too long, it may lead to the release of phosphorus under anaerobic conditions, reduce the phosphorus removal efficiency of the wastewater treatment plant, and thus generate odor, causing adverse environmental impact. Utility Model Content

[0007] To address the aforementioned issues, this invention provides a novel sludge thickening device that incorporates a movable mixer and an aeration unit. This device not only thickens the sludge but also performs multiple functions such as sludge storage, screening, and activation, providing more comprehensive technical support for the operation of wastewater treatment plants and enhancing their overall treatment capacity.

[0008] According to one aspect of this utility model, a novel sludge thickening device is provided, comprising a tank body with a sludge inlet pipe connected to the center of the top of the tank body. A detachable submersible mixer and multiple vertical aeration pipes are installed in the tank body. The submersible mixer includes a vertical rotating rod, a motor, and multiple stirring blades. The rotating rod is installed in the center of the tank body, the motor is connected to the top of the rotating rod, and the multiple stirring blades are connected to the bottom of the rotating rod. Each aeration pipe is connected to the rotating rod and distributed around the rotating rod, and each aeration pipe is connected to the same blower.

[0009] In some embodiments, the bottom of the pool body has a V-shaped cross-section, and a stirring trough is located in the center of the bottom of the pool body, with each of the stirring blades located in the stirring trough. This has the advantage of ensuring the stable setting and smooth operation of the stirring blades.

[0010] In some embodiments, multiple interconnected vent pipes are connected around the lower part of the rotating rod, and the bottom end of each aeration pipe is connected to a vent pipe, with each vent pipe connected to the same blower. The advantage is that the specific manner in which the aeration pipes are connected is described.

[0011] In some embodiments, the distance between the aeration tubes located on the same side of the rotating rod is equal. This is advantageous because it describes the distribution of the aeration tubes, enabling uniform aeration.

[0012] In some embodiments, a plurality of fixing brackets are provided around the center of the rotating rod, and each aeration pipe is fixedly mounted on each of the fixing brackets. The advantage is that the fixing brackets can further secure the installation of each aeration pipe.

[0013] In some embodiments, multiple weir plates are provided at the top edge of the pool. This is advantageous because the weir plates facilitate the overflow of clear liquid from the upper layer of the pool.

[0014] In some embodiments, the outlet weir plate is provided with multiple outlet weir plates arranged side by side. Its advantage is that the outlet weir plates facilitate smooth water discharge.

[0015] In some embodiments, a storage tank is provided outside the pool body near the outlet weir plate. The advantage of this is that the storage tank can contain the overflowing clear liquid.

[0016] In some embodiments, the bottom of the pool is connected to multiple outlet pipes. This is advantageous because each outlet pipe can be used to release the clear liquid or sludge from the pool, or to empty the pool.

[0017] In some embodiments, a valve is provided on the outlet pipe. The advantage of this is that the valve can be used to control the opening and closing of the outlet pipe. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural diagram of a novel sludge thickening device according to one embodiment of the present invention;

[0019] Figure 2 for Figure 1 The diagram shows a partial cross-sectional structure of a novel sludge thickening device.

[0020] Figure 3 for Figure 1 The diagram shows the structure of the outlet weir plate.

[0021] In the diagram: 1. Tank body; 2. Sludge inlet pipe; 3. Submersible mixer; 4. Aeration pipe; 5. Water storage tank; 11. Mixing tank; 12. Water outlet weir plate; 13. Oblong hole; 14. Outlet pipe; 15. Valve; 31. Rotating rod; 32. Motor; 33. Mixing fan blade; 41. Ventilation pipe; 42. Fixing frame. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] like Figure 1-3 As shown, the device includes a pool body 1, with a sludge inlet pipe 2 connected to the center of the top of the pool body 1 and located outside the pool body 1. The other end of the sludge inlet pipe 2 is connected to a sludge mixing well (not shown in the figure), so that the sludge to be treated can be introduced into the pool body 1 from the sludge mixing well through the sludge inlet pipe 2.

[0024] A detachable submersible mixer 3 and multiple aeration pipes 4 are installed in the tank body 1. The submersible mixer 3 includes a vertical rotating rod 31, a motor 32, and multiple stirring blades 33. The rotating rod 31 is installed in the center of the tank body 1, with its top end extending to the outside of the tank body 1 and connected to the motor 32. The bottom end of the rotating rod 31 extends to the bottom of the tank body 1, and the multiple stirring blades 33 are distributed and installed at the bottom end of the rotating rod 31.

[0025] Therefore, the sludge in the thickening device can be fully mixed and stirred by the submersible mixer 3, and homogenized fermentation can be carried out.

[0026] Preferably, the bottom of the pool body 1 has a V-shaped cross section, and a stirring tank 11 is located in the center of the bottom of the pool body 1, while multiple stirring blades 33 are located in the stirring tank 11.

[0027] Multiple interconnected vent pipes 41 are connected around the lower part of the rotating rod 31. These aeration pipes 4 are vertically arranged, with their bottom ends connected to each vent pipe 41, thus distributing the aeration pipes 4 around the rotating rod 31. All aeration pipes 4 and vent pipes 41 are connected to the same blower (not shown in the figure). The distances between the aeration pipes 4 located on the same side of the rotating rod 31 are approximately equal, resulting in a relatively uniform distribution.

[0028] Therefore, by intermittently starting the blower to provide air to the aeration pipe 4, the oxygen required by the microorganisms in the sludge is guaranteed. At the same time, each aeration pipe 4 can rotate with the operation of the submersible mixer 3, thereby ensuring the aeration effect of the entire thickening device and enabling the targeted cultivation of activated sludge in the thickening device, ultimately forming target granular sludge or nitrifying bacteria and other microbial species.

[0029] Preferably, multiple fixing brackets 42 are provided around the middle part of the rotating rod 31, and each aeration pipe 4 is also fixedly installed on each fixing bracket 42.

[0030] Preferably, multiple water outlet weir plates 12 are provided at the top edge of the pool body 1 to facilitate the overflow of clear liquid in the upper layer of the pool body 1. Among them, multiple oblong holes 13 are provided on the water outlet weir plates 12, which are arranged side by side and the distance between them is approximately equal, so as to facilitate smooth water discharge.

[0031] More preferably, a water storage tank 5 is provided outside the pool body 1 near the outlet weir plate 12, which can contain the overflowing clear liquid.

[0032] At the bottom of the tank body 1, there are multiple outlet pipes 14 (only one is shown in the figure), which can be used to release the clear liquid or sludge in the tank body 1, or to empty the tank body 1. Valves 15 can also be installed on the outlet pipes 14 for opening and closing control as needed.

[0033] In addition, during the rainy season, the biological treatment process of the sewage treatment plant experiences a large volume of water impact, resulting in the loss of activated sludge in the biological treatment tank. It is necessary to replenish the activated sludge. At this time, the sludge thickening device can be activated by aeration and other measures in the tank, and then transferred to the biological treatment tank to replenish the activated sludge, ensuring the normal operation of sewage treatment.

[0034] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A novel sludge thickening device characterized by: The utility model provides a sludge treatment device, which comprises a pool body (1), a sludge inlet pipe (2) is communicated with the top center of the pool body (1), a detachable submersible mixer (3) and a plurality of vertical aeration pipes (4) are installed in the pool body (1), wherein the submersible mixer (3) comprises a vertical rotating rod (31), a motor (32) and a plurality of stirring blades (33), the rotating rod (31) is installed in the center of the pool body (1), the motor (32) is connected to the top end of the rotating rod (31), and the plurality of stirring blades (33) are connected to the bottom end of the rotating rod (31); each aeration pipe (4) is connected with the rotating rod (31) and is distributed and installed around the rotating rod (31), and each aeration pipe (4) is communicated with the same air blower.

2. A novel sludge thickener as claimed in claim 1, wherein: The bottom of the pool body (1) is in V-shaped section, and a stirring groove (11) is arranged in the center of the bottom of the pool body (1), and each stirring blade (33) is located in the stirring groove (11).

3. A novel sludge thickener as claimed in claim 1, wherein: The lower part of the rotating rod (31) is connected with a plurality of air pipes (41) in communication with each other, the bottom end of each aeration pipe (4) is connected to each air pipe (41), and each air pipe (41) is communicated with the same air blower.

4. A novel sludge thickener as claimed in claim 1, wherein: The distance between each aeration pipe (4) located on the same side of the rotating rod (31) is equal.

5. A novel sludge thickener as claimed in claim 1, wherein: A plurality of fixing frames (42) are arranged around the middle part of the rotating rod (31), and each aeration pipe (4) is fixedly installed on each fixing frame (42).

6. A novel sludge thickener as claimed in claim 1, wherein: A plurality of water outlet weir plates (12) are arranged on the edge top of the pool body (1).

7. A novel sludge thickener device as claimed in claim 6, wherein: A plurality of long circular holes (13) are arranged on the water outlet weir plate (12) in parallel.

8. A novel sludge thickener device as claimed in claim 6, wherein: A water storage pool (5) is arranged outside the pool body (1) close to the water outlet weir plate (12).

9. A novel sludge thickener as claimed in claim 1, wherein: A plurality of outlet pipes (14) are connected to the bottom of the pool body (1).

10. A novel sludge thickener device as claimed in claim 9, wherein: Valves (15) are arranged on the outlet pipes (14).

Images