Alkaline wastewater treatment tank

Abstract

The utility model relates to the field of water treatment equipment, in particular to an alkaline wastewater treatment tank which comprises a cylindrical tank body, a water inlet pipe is arranged on one side of the bottom of the tank body, and a water outlet pipe is arranged on one side of the top of the tank body; an aeration disc is fixedly mounted in the lower end of the tank body, a plurality of aeration holes which are uniformly distributed are formed in the top wall of the aeration disc, a mixing channel is formed in the space, between the water inlet pipe and the water outlet pipe, in the tank body, and a spiral guide vane is fixedly mounted in the mixing channel. Alkaline wastewater entering the tank body is mixed with carbon dioxide and then flows upwards through the mixing channel, the alkaline wastewater forms rotational flow in the mixing channel by arranging the spiral guide vanes, the alkaline wastewater and carbon dioxide are mixed more sufficiently, meanwhile, the retention time of the wastewater in the tank body is prolonged, and the wastewater treatment effect is further improved.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment, specifically to an alkaline wastewater treatment tank. Background Technology

[0002] During the reinforcement of the underground tunneling construction face, the use of acid- and corrosion-resistant materials results in a large amount of wastewater with excessive alkalinity that needs to be treated.

[0003] In the prior art, utility model patent application number CN202220385593.8 discloses an automatic high-alkalinity wastewater treatment tank for underground tunneling projects. This tank includes a carbon dioxide infusion tank, an upper partition plate, and a middle partition plate, dividing the carbon dioxide infusion tank into an upper container structure, a middle container structure, and a lower container structure. The lower container structure includes: a bottom partition plate, a lower partition plate, wastewater and carbon dioxide inlet pipes, a carbon dioxide recovery pipe, an aeration disc, a drain pipe, several first air holes, and valves. Wastewater and carbon dioxide gas are mixed together and injected into the lower container structure of the carbon dioxide infusion tank through the wastewater and carbon dioxide inlet pipes. In the lower container structure, the aeration disc causes a preliminary reaction between the carbon dioxide and wastewater, after which the wastewater is sent to the middle container structure through the middle water inlet pipe, and then the wastewater is sent to the upper container structure. Compared to the traditional method of adding hydrochloric acid or sulfuric acid to neutralize the acidity or alkalinity of wastewater, carbon dioxide treatment of high-alkalinity wastewater has unique advantages.

[0004] The above-mentioned wastewater treatment tanks also have the following defects during use: the aeration discs are easily clogged by solid impurities in the wastewater over a long period of time, which leads to uneven carbon dioxide aeration or reduced carbon dioxide intake, resulting in poor wastewater treatment effect, which needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide an alkaline wastewater treatment tank that can prevent the aeration holes from clogging, thereby solving the defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An alkaline wastewater treatment tank includes a cylindrical tank body with an inlet pipe on one side of the bottom and an outlet pipe on one side of the top. An aeration disc is fixedly installed inside the lower end of the tank body. The top wall of the aeration disc has a plurality of evenly distributed aeration holes. A mounting frame is vertically slidably installed on the top of the aeration disc. A cleaning rod corresponding to each aeration hole is fixedly installed on the bottom of the mounting frame. The cleaning rod is equipped with bristles. A drive mechanism is provided inside the tank body to drive the mounting frame to reciprocate vertically. The internal space of the tank body between the inlet pipe and the outlet pipe forms a mixing channel, and a spiral guide vane is fixedly installed inside the mixing channel.

[0008] As a further improvement, a coaxially arranged central tube is fixedly installed in the mixing channel by a support rod, and the guide vanes are welded to the central tube, with the edges of the guide vanes contacting the inner wall of the tank.

[0009] As a further improvement, the driving mechanism includes a stirring shaft located inside the tank and driven to rotate by a power device. The stirring shaft is coaxially arranged with the tank. A pin extending radially is fixedly installed at the lower end of the stirring shaft. An annular sleeve coaxially arranged with the stirring shaft is fixedly installed at the top of the mounting bracket. An elastic element is provided between the top of the aeration disc and the bottom of the mounting bracket. The pin abuts against the top of the annular sleeve. The top of the annular sleeve has a protrusion. When the pin rotates to the top of the protrusion, the mounting bracket moves down and drives the cleaning rod to insert into the corresponding aeration hole.

[0010] As a further improvement, a curved surface is provided between one end of the protrusion and the annular sleeve. The curved surface smoothly connects the top of the annular sleeve and the top of the protrusion. When the pin rotates, it moves along the curved surface to the top of the protrusion.

[0011] As a further improvement, the guide vane is fixedly equipped with a plurality of evenly distributed columnar protrusions.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. When the stirring shaft rotates, it drives the pin shaft to rotate synchronously. The pin shaft acts on the protrusion at the top of the annular sleeve and drives the mounting frame to move up and down reciprocally. The mounting frame drives the cleaning rod to efficiently clean the aeration holes, preventing solid impurities in the wastewater from clogging the aeration holes, ensuring a sufficient supply of carbon dioxide to the alkaline wastewater, and improving the treatment effect of alkaline wastewater.

[0014] 2. After the alkaline wastewater enters the tank and mixes with carbon dioxide, it flows upward through the mixing channel. The spiral guide vanes create a swirling flow within the mixing channel, ensuring more thorough mixing of the alkaline wastewater and carbon dioxide. This also extends the residence time of the wastewater in the tank, further improving the wastewater treatment effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 A cross-sectional view;

[0018] Figure 3 This is a schematic diagram of the aeration disc in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the annular sleeve according to an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the guide vane in an embodiment of the present invention.

[0021] In the diagram: 1-Tank body; 2-Inlet pipe; 3-Outlet pipe; 4-Aeration disc; 5-Aeration hole; 6-Mounting bracket; 8-Mixing channel; 9-Guide vane; 10-Support rod; 11-Central pipe; 12-Agitator shaft; 13-Pin; 14-Annular sleeve; 15-Protrusion; 16-Curved surface; 17-Columnar protrusion; 18-Air inlet pipe; 19-Air outlet pipe; 20-Slide rod; 21-Drive motor; 22-Agitator blade; 23-Spring; 24-Cleaning rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 5 As shown, an alkaline wastewater treatment tank includes a cylindrical tank body 1. A water inlet pipe 2 is provided on one side of the bottom of the tank body 1, and a water outlet pipe 3 is provided on one side of the top. A hollow aeration disc 4 is fixedly installed inside the lower end of the tank body 1. The aeration disc 4 is circular and coaxial with the tank body 1. A support column is fixed between the bottom of the aeration disc 4 and the bottom wall of the tank body 1 by bolts. An air inlet pipe 18 extending to the outside of the tank body 1 is connected to one side of the aeration disc 4. Carbon dioxide is introduced into the aeration disc 4 through the air inlet pipe 18. A plurality of aeration holes 5 are evenly distributed on the top wall of the aeration disc 4.

[0024] In use, alkaline wastewater is injected into tank 1 through inlet pipe 2, while carbon dioxide is injected into aeration disc 4 through air inlet pipe 18. Multiple aeration holes 5 on the top wall of aeration disc 4 evenly aerate the tank 1, ensuring thorough mixing of carbon dioxide and alkaline wastewater. When the liquid level in tank 1 exceeds the outlet pipe 3, the wastewater at the top of tank 1 that has fully reacted with carbon dioxide can be discharged through outlet pipe 3. Additionally, an air outlet pipe 19 is installed at the top of tank 1 to recover any unreacted carbon dioxide. A drain pipe is also installed at the top of tank 1 for easy emptying of the tank.

[0025] like Figure 2 and Figure 3 As shown, a mounting bracket 6 is vertically slidably installed on the top of the aeration disc 4. The mounting bracket 6 includes an annular frame and multiple crossbars welded inside the frame. Multiple sliding rods 20 are fixedly installed on the top edge of the aeration disc 4, which are evenly spaced in the circumference. The sliding rods 20 extend vertically. The frame portion of the mounting bracket 6 is vertically slidably installed on the multiple sliding rods 20. The lower end of the sliding rod 20 is provided with external threads and screwed onto the aeration disc 4. The upper end of the sliding rod 20 is integrally formed with a stop to prevent the mounting bracket 6 from detaching.

[0026] Multiple vertically extending cleaning rods 24 are fixedly installed on the crossbars of the aeration disc 4. Each cleaning rod 24 corresponds to an aeration hole 5. The outer diameter of the cleaning rod 24 is smaller than the inner diameter of the aeration hole 5. The outer side of the cleaning rod 24 is equipped with bristles. The tank body 1 is equipped with a drive mechanism for driving the mounting frame 6 to move vertically back and forth. During use, the drive mechanism drives the mounting frame 6 to move back and forth on the top of the aeration disc 4. When the mounting frame 6 moves downward, it can drive the cleaning rod 24 to insert into the corresponding aeration hole 5. Thus, when the cleaning rod 24 moves vertically back and forth, it cleans the inner wall of the aeration hole 5 with the bristles, preventing solid impurities in the wastewater from clogging the aeration hole 5.

[0027] like Figure 2 and Figure 5 As shown, the internal space of the tank 1 located between the inlet pipe 2 and the outlet pipe 3 forms a mixing channel 8. A coaxially arranged central pipe 11 is provided in the mixing channel 8. Support rods 10 are fixedly installed at the upper and lower ends of the central pipe 11 and the inner wall of the tank 1, respectively. Spiral guide vanes 9 are welded on the outer wall of the central pipe 11, and the edges of the guide vanes 9 are in contact with the inner wall of the tank 1.

[0028] After the alkaline wastewater enters the tank 1 and mixes with carbon dioxide, it flows upward through the mixing channel 8. The spiral guide vanes 9 create a swirling flow of alkaline wastewater in the mixing channel 8, which makes the mixing of alkaline wastewater and carbon dioxide more thorough and also prolongs the residence time of the wastewater in the tank 1.

[0029] The driving mechanism includes a stirring shaft 12 located inside the tank 1 and driven to rotate by a power unit. The stirring shaft 12 is coaxially arranged with the tank 1 and is rotatably connected to the top wall of the tank 1 via bearings. The driving mechanism includes a motor bracket located at the top of the tank 1. A drive motor 21 is bolted to the top of the motor bracket. The rotating shaft of the drive motor 21 is connected to the upper end of the stirring shaft 12 via a coupling. Stirring blades 22 located below the mixing channel 8 are welded onto the stirring shaft 12. When the stirring shaft 12 rotates, it drives the stirring blades 22 to stir the alkaline wastewater, further improving the uniformity of the mixing of alkaline wastewater and carbon dioxide.

[0030] like Figure 3 and Figure 4 As shown, pins 13 extending radially are welded to opposite sides of the lower end of the stirring shaft 12. An annular sleeve 14 coaxially arranged with the stirring shaft 12 is welded to the top of the mounting frame 6. An elastic element is provided between the top of the aeration disc 4 and the bottom of the mounting frame 6. Specifically, the elastic element is a spring 23 sleeved on the slide rod 20 below the mounting frame 6. The spring 23 provides an upward thrust to the mounting frame 6, thereby causing the pins 13 to abut against the top of the annular sleeve 14. The top of the annular sleeve 14 is integrally formed with a protrusion 15. In this embodiment, two protrusions 15 are centrally symmetrically arranged on the top of the annular sleeve 14. When the pins 13 rotate to the top of the protrusions 15, the mounting frame 6 moves down and drives the cleaning rod 24 to insert into the corresponding aeration hole 5.

[0031] Specifically, while the stirring shaft 12 rotates to stir the alkaline wastewater, the stirring shaft 12 drives the pin 13 to rotate synchronously. When the pin 13 rotates to the top of the protrusion 15, it drives the mounting bracket 6 to move down and compresses the spring 23. When the pin 13 rotates to disengage from the protrusion 15, the spring 23 extends and drives the mounting bracket 6 to move up and back to its original position. Thus, as the stirring shaft 12 rotates, the mounting bracket 6 moves up and down back and forth. The mounting bracket 6 drives the cleaning rod 24 to efficiently clean the aeration holes 5.

[0032] In order to improve the smoothness of the rotation of the pin 13 and avoid the protrusion 15 from obstructing the rotation of the pin 13, a curved surface 16 is provided between one end of the protrusion 15 and the annular sleeve 14. The curved surface 16 smoothly connects the top of the annular sleeve 14 and the top of the protrusion 15. The curved surface 16 faces the direction of the rotation of the pin 13. When the pin 13 rotates, it moves along the curved surface 16 to the top of the protrusion 15.

[0033] In this embodiment, the bottom of the guide vane 9 is welded with a plurality of uniformly distributed columnar protrusions 17, which serve to divert turbulent flow and further improve the uniformity of mixing alkaline wastewater and carbon dioxide.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An alkaline wastewater treatment tank, characterized in that: The tank (1) includes a cylindrical tank body (1), with an inlet pipe (2) on one side of the bottom and an outlet pipe (3) on one side of the top. An aeration disc (4) is fixedly installed inside the lower end of the tank body (1), and multiple aeration holes (5) are evenly distributed on the top wall of the aeration disc (4). A mixing channel (8) is formed in the internal space of the tank body (1) between the inlet pipe (2) and the outlet pipe (3), and a spiral guide vane (9) is fixedly installed inside the mixing channel (8). A mounting bracket (6) is vertically slidably installed on the top of the aeration disc (4). A cleaning rod (24) corresponding to the aeration hole (5) is fixedly installed on the bottom of the mounting bracket (6). The cleaning rod (24) is provided with bristles. A drive mechanism for driving the mounting bracket (6) to move vertically back and forth is provided inside the tank (1).

2. The alkaline wastewater treatment tank as described in claim 1, characterized in that: A coaxially arranged central tube (11) is fixedly installed in the mixing channel (8) by a support rod (10). The guide vane (9) is welded on the central tube (11), and the edge of the guide vane (9) is in contact with the inner wall of the tank (1).

3. The alkaline wastewater treatment tank as described in claim 1, characterized in that: The driving mechanism includes a stirring shaft (12) driven to rotate by a power device located inside the tank (1). The stirring shaft (12) is coaxially arranged with the tank (1). A pin (13) extending radially is fixedly installed at the lower end of the stirring shaft (12). An annular sleeve (14) coaxially arranged with the stirring shaft (12) is fixedly installed at the top of the mounting bracket (6). An elastic element is provided between the top of the aeration disc (4) and the bottom of the mounting bracket (6). The pin (13) abuts against the top of the annular sleeve (14). A protrusion (15) is provided at the top of the annular sleeve (14). When the pin (13) rotates to the top of the protrusion (15), the mounting bracket (6) moves down and drives the cleaning rod (24) to insert into the corresponding aeration hole (5).

4. The alkaline wastewater treatment tank as described in claim 3, characterized in that: A curved surface (16) is provided between one end of the protrusion (15) and the annular sleeve (14). The curved surface (16) smoothly connects the top of the annular sleeve (14) and the top of the protrusion (15). When the pin (13) rotates, it moves along the curved surface (16) to the top of the protrusion (15).

5. The alkaline wastewater treatment tank as described in claim 1, characterized in that: The guide vane (9) is fixedly installed with a plurality of evenly distributed columnar protrusions (17).

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