Improved alkaline automatic wastewater treatment tank

Abstract

The utility model relates to the field of water treatment equipment, in particular to an improved automatic alkaline wastewater treatment tank, which is characterized in that a lower partition plate and an upper partition plate are fixedly mounted in a tank body, and a gas-liquid mixed injection pipe is fixedly mounted on the side wall of the tank body below the lower partition plate; a spiral pipe is fixedly mounted between the lower partition plate and the upper partition plate, an annular water baffle is fixedly mounted at the top of the upper partition plate, and a stirring aeration assembly is arranged on the inner side of the water baffle; a water permeable hole is formed in the upper partition plate located on the outer side of the water baffle, a water outlet pipe and a gas outlet pipe are further arranged on the side wall of the tank body located between the lower partition plate and the upper partition plate, and a gas backflow assembly is connected to the tank body located between the lower partition plate and the water outlet pipe; wastewater and carbon dioxide flow upwards to the top of the upper partition plate on the inner side of the water baffle through the spiral pipe after entering the tank body through the gas-liquid mixed injection pipe, the retention time of the wastewater and the carbon dioxide in the tank body can be effectively prolonged by arranging the spiral pipe, and the wastewater and the carbon dioxide can fully react in the spiral pipe.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment, specifically to an improved alkaline automatic 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] However, the wastewater in the aforementioned wastewater treatment tank has a short residence time when carbon dioxide is introduced into the tank, which is not conducive to the full reaction between the wastewater and carbon dioxide, resulting in poor wastewater treatment effect, which needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide an improved alkaline automatic wastewater treatment tank, which allows for a more complete reaction between wastewater and carbon dioxide, thereby addressing the deficiencies mentioned in the background art.

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

[0007] An improved alkaline automatic wastewater treatment tank includes a cylindrical tank body. A lower partition and an upper partition located above the lower partition are fixedly installed inside the tank body. A gas-liquid mixing injection pipe is fixedly installed on the side wall of the tank body below the lower partition. A spiral tube is fixedly installed between the lower and upper partitions. An annular baffle is fixedly installed on the top of the upper partition. The lower end of the spiral tube connects to the tank body below the lower partition, and the upper end of the spiral tube connects to the top of the upper partition located inside the baffle. A stirring and aeration assembly is provided inside the baffle. Water permeable holes are provided on the upper partition located outside the baffle. A water outlet pipe and an air outlet pipe are also provided on the side wall of the tank body between the lower and upper partitions. The air outlet pipe is located above the water outlet pipe. A gas reflux assembly is connected to the tank body between the lower partition and the water outlet pipe.

[0008] As a further improvement, the gas-liquid mixing injection pipe is arranged along the tangential direction of the tank body.

[0009] As a further improvement, the stirring aeration assembly includes a vertically extending air inlet pipe rotatably mounted on the top of the tank. The upper end of the air inlet pipe is rotatably connected to a carbon dioxide supply pipe. The lower end of the air inlet pipe extends to the inner side of the baffle plate and is fixedly mounted with a horizontally extending aeration pipe. The aeration pipe is provided with a plurality of air outlet holes evenly spaced along its length. The top of the tank is provided with a drive component for driving the air inlet pipe to rotate.

[0010] As a further improvement, the gas reflux assembly includes a gas reflux pipe located on the outside of the tank body. The inlet end of the gas reflux pipe is connected to the top of the tank body, and the outlet end of the gas reflux pipe is connected to an annular pipe. A plurality of carbon dioxide injection pipes are fixedly installed on the inner side of the annular pipe and are evenly spaced in a circumferential manner. One end of the carbon dioxide injection pipe extends into the tank body between the lower partition and the upper partition, and the height of the carbon dioxide injection pipe is lower than the height of the water outlet pipe.

[0011] As a further improvement, the carbon dioxide injection pipe extends along the tangential direction of the tank body.

[0012] As a further improvement, a vacuum pump is installed on the gas return pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. After the wastewater and carbon dioxide enter the tank through the gas-liquid mixing injection pipe, they flow upward through the spiral tube to the top of the upper baffle inside the baffle plate. By setting the spiral tube, the residence time of wastewater and carbon dioxide in the tank can be effectively extended, and the wastewater and carbon dioxide can fully react in the spiral tube, thereby improving the wastewater treatment effect.

[0015] 2. The wastewater is mixed with carbon dioxide a second time inside the baffle plate, and then the wastewater is mixed with carbon dioxide a third time at the top of the lower baffle plate. Through multiple mixing of wastewater and carbon dioxide, the wastewater treatment effect is further improved.

[0016] 3. Both the gas-liquid mixing injection pipe and the carbon dioxide injection pipe extend along the tangential direction of the tank, thereby creating a swirling flow of wastewater inside the tank, which is beneficial for the thorough mixing of wastewater and carbon dioxide.

[0017] 4. While the aeration pipe aerates the tank, the motor drives the air inlet pipe to rotate. The air inlet pipe stirs the wastewater inside the baffle plate through the aeration pipe, making the wastewater and carbon dioxide mix more thoroughly and further improving the wastewater treatment effect. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0020] Figure 2 yes Figure 1 A cross-sectional view;

[0021] Figure 3 yes Figure 2 A three-dimensional schematic diagram;

[0022] Figure 4 This is a schematic diagram of the structure of the carbon dioxide injection tube according to an embodiment of the present invention.

[0023] In the diagram: 1-Tank body; 2-Lower baffle; 3-Upper baffle; 4-Gas-liquid mixing injection pipe; 5-Drain pipe; 6-Spiral pipe; 7-Water baffle; 8-Air inlet pipe; 9-Carbon dioxide supply pipe; 10-Aeration pipe; 11-Air outlet; 12-Motor; 13-Belt; 14-Water permeable hole; 15-Water outlet pipe; 16-Air outlet pipe; 17-Annular pipe; 18-Carbon dioxide injection pipe; 19-Air pump; 20-Gas return pipe. Detailed Implementation

[0024] 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.

[0025] like Figures 1 to 4 As shown, an improved alkaline automatic wastewater treatment tank includes a cylindrical tank body 1. A lower baffle 2 and an upper baffle 3 located above the lower baffle 2 are welded inside the tank body 1. A gas-liquid mixing injection pipe 4 is welded to the side wall of the tank body 1 below the lower baffle 2 for injecting wastewater and carbon dioxide into the tank body 1. An evacuation pipe 5 is also provided at the bottom of the tank body 1. The gas-liquid mixing injection pipe 4 is arranged tangentially to the tank body 1, so that the wastewater forms a swirling flow after entering the tank body 1 through the gas-liquid mixing injection pipe 4, which is beneficial for the thorough mixing of wastewater and carbon dioxide.

[0026] like Figure 2 and Figure 3 As shown, a spiral tube 6 is welded between the lower partition 2 and the upper partition 3. Multiple spiral tubes 6 are evenly spaced. An annular baffle 7 is welded to the top of the upper partition 3. The baffle 7 is coaxially arranged with the tank body 1. The lower end of the spiral tube 6 is connected to the tank body 1 located below the lower partition 2, and the upper end of the spiral tube 6 is connected to the top of the upper partition 3 located inside the baffle 7.

[0027] Wastewater and carbon dioxide first enter the tank 1 below the lower baffle 2 through the gas-liquid mixing injection pipe 4. Then, the wastewater and carbon dioxide flow upward through the spiral pipe 6 to the top of the upper baffle 3 inside the baffle plate 7. By setting the spiral pipe 6, the residence time of wastewater and carbon dioxide in the tank 1 can be effectively extended, and the wastewater and carbon dioxide can fully react in the spiral pipe 6, thereby improving the wastewater treatment effect.

[0028] The inner side of the baffle plate 7 is provided with a stirring and aeration assembly. The stirring and aeration assembly includes a vertically extending air inlet pipe 8 that is rotatably mounted on the top of the tank body 1 via bearings. The air inlet pipe 8 is coaxially arranged with the tank body 1. The upper end of the air inlet pipe 8 is rotatably connected to a carbon dioxide supply pipe 9 via a rotary joint. The lower end of the air inlet pipe 8 is closed. The lower end of the air inlet pipe 8 extends to the inner side of the baffle plate 7 and is welded with a horizontally extending aeration pipe 10. Multiple aeration pipes 10 are evenly spaced around the axis of the air inlet pipe 8. One end of the aeration pipe 10 is connected to the air inlet pipe 8, and the end of the aeration pipe 10 away from the air inlet pipe 8 is closed. Multiple air outlets 11 are evenly spaced along the length of the horizontal side of the aeration pipe 10. The top of the tank body 1 is provided with a drive component for rotating the air inlet pipe 8. The drive component is a motor 12 that is bolted to the top of the tank body 1. The rotating shaft of the motor 12 is connected to the air inlet pipe 8 via a belt 13.

[0029] Carbon dioxide is supplied to the inlet pipe 8 through the carbon dioxide supply pipe 9. The carbon dioxide enters the tank 1 through the inlet pipe 8, the aeration pipe 10 and the outlet 11 in sequence, so that the wastewater is mixed with the carbon dioxide on the inside of the baffle plate 7. At the same time, the motor 12 drives the inlet pipe 8 to rotate. The inlet pipe 8 stirs the wastewater on the inside of the baffle plate 7 through the aeration pipe 10, so that the wastewater and carbon dioxide are mixed more thoroughly, and the wastewater treatment effect is further improved.

[0030] The upper partition 3 located outside the baffle plate 7 is provided with vertically penetrating water perforations 14. Multiple water perforations are evenly spaced around the baffle plate 7. The side wall of the tank 1 located between the lower partition plate 2 and the upper partition plate 3 is also provided with a water outlet pipe 15 and an air outlet pipe 16. The water outlet pipe 15 penetrates horizontally through one side wall of the tank 1. The end of the water outlet pipe 15 located inside the tank 1 is provided with a downwardly extending water inlet. The air outlet pipe 16 is located above the water outlet pipe 15.

[0031] A gas reflux assembly is connected to the tank 1 located between the lower partition 2 and the outlet pipe 15. The gas reflux assembly includes a gas reflux pipe 20 located on the outside of the tank 1. The inlet end of the gas reflux pipe 20 is connected to the top of the tank 1, and the outlet end of the gas reflux pipe 20 is connected to an annular pipe 17. The annular pipe 17 is sleeved on the outside of the tank 1 and is coaxially arranged with the tank 1. A plurality of carbon dioxide injection pipes 18 are welded to the inner side of the annular pipe 17 at uniform intervals in a circumferential direction. One end of the carbon dioxide injection pipe 18 extends into the tank 1 between the lower partition 2 and the upper partition 3 and is fixed to the side wall of the tank 1 by welding. The height of the carbon dioxide injection pipe 18 is lower than the height of the outlet pipe 15. A vacuum pump 19 is also installed on the gas reflux pipe 20.

[0032] When the wastewater inside the baffle 7 overflows the top of the baffle 7, it flows downward through the permeable holes 14 on the upper baffle 3 to the top of the lower baffle 2. At the same time, driven by the air pump 19, the carbon dioxide that has not fully reacted with the wastewater flows to the upper end of the tank 1 and enters the tank 1 between the lower baffle 2 and the upper baffle 3 through the gas return pipe 20, the annular pipe 17 and the carbon dioxide injection pipe 18 in sequence, so that the wastewater and carbon dioxide are mixed three times at the top of the lower baffle 2. After the wastewater at the top of the lower baffle 2 overflows the outlet pipe 15, the treated wastewater is discharged through the outlet pipe 15, and the remaining unreacted gas is discharged from the gas outlet pipe 16.

[0033] like Figure 4 As shown, the carbon dioxide injection pipe 18 extends along the tangential direction of the tank body 1. When carbon dioxide enters the tank body 1 between the lower baffle 2 and the upper baffle 3 through the carbon dioxide injection pipe 18, the wastewater at the top of the lower baffle 2 forms a swirling flow under the impact of the carbon dioxide, and the wastewater and carbon dioxide are mixed more thoroughly.

[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 improved automatic alkaline wastewater treatment tank, characterized in that: The system includes a cylindrical tank (1), inside which a lower partition (2) and an upper partition (3) located above the lower partition (2) are fixedly installed. A gas-liquid mixing injection pipe (4) is fixedly installed on the side wall of the tank (1) below the lower partition (2). A spiral tube (6) is fixedly installed between the lower partition (2) and the upper partition (3). An annular baffle (7) is fixedly installed on the top of the upper partition (3). The lower end of the spiral tube (6) is connected to the tank (1) located below the lower partition (2), and the upper end of the spiral tube (6) is connected to... The upper partition (3) is located on the top of the inner side of the baffle plate (7), and the inner side of the baffle plate (7) is provided with a stirring and aeration assembly; the upper partition (3) located on the outer side of the baffle plate (7) is provided with a water permeable hole (14), and the side wall of the tank (1) located between the lower partition plate (2) and the upper partition plate (3) is also provided with a water outlet pipe (15) and an air outlet pipe (16), the air outlet pipe (16) is located above the water outlet pipe (15), and a gas return assembly is connected to the tank (1) located between the lower partition plate (2) and the water outlet pipe (15).

2. The improved alkaline automatic wastewater treatment tank as described in claim 1, characterized in that: The gas-liquid mixing injection pipe (4) is arranged along the tangential direction of the tank body (1).

3. The improved alkaline automatic wastewater treatment tank as described in claim 1, characterized in that: The stirring aeration assembly includes a vertically extending air inlet pipe (8) rotatably mounted on the top of the tank (1). The upper end of the air inlet pipe (8) is rotatably connected to a carbon dioxide supply pipe (9). The lower end of the air inlet pipe (8) extends to the inner side of the baffle plate (7) and is fixedly mounted with a horizontally extending aeration pipe (10). The aeration pipe (10) is provided with a plurality of air outlet holes (11) evenly spaced along its length. The top of the tank (1) is provided with a driving component for driving the air inlet pipe (8) to rotate.

4. An improved alkaline automatic wastewater treatment tank as described in claim 1, characterized in that: The gas reflux assembly includes a gas reflux pipe (20) located outside the tank (1). The inlet end of the gas reflux pipe (20) is connected to the top of the tank (1), and the outlet end of the gas reflux pipe (20) is connected to an annular pipe (17). A plurality of carbon dioxide injection pipes (18) are fixedly installed on the inner side of the annular pipe (17) and evenly spaced in a circumferential manner. One end of the carbon dioxide injection pipe (18) extends into the tank (1) between the lower partition (2) and the upper partition (3). The height of the carbon dioxide injection pipe (18) is lower than the height of the water outlet pipe (15).

5. An improved alkaline automatic wastewater treatment tank as described in claim 4, characterized in that: The carbon dioxide injection pipe (18) extends along the tangential direction of the tank body (1).

6. An improved alkaline automatic wastewater treatment tank as described in claim 4, characterized in that: A vacuum pump (19) is installed on the gas return pipe (20).

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