Micro-nano dissolved air efficient hardness removal device

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a micro-nano dissolved air efficient hardness removal device which comprises a reaction tank, a second bearing is embedded in the top of the reaction tank, and a second fixing rod is fixedly installed on an inner ring of the second bearing. Stirring rods are installed on the outer side of the section, extending into the reaction tank, of the second fixing rod in an annular array mode, a shell is installed at the position, above the second fixing rod, of the top of the reaction tank, first bearings are installed at the upper end and the lower end of the shell in an embedded mode, and first fixing rods are fixedly installed on inner rings of the two first bearings; and paddles are installed on the outer side of the section, located in the shell, of the first fixing rod in an annular array mode, a water suction pipe is installed on one side of the shell in an embedded mode, and a water outlet pipe is installed on the other side of the shell in an embedded mode. The reaction tank disclosed by the utility model has the advantages that the wastewater is mixed and stirred while being circulated in the reaction tank, so that the wastewater can be fully contacted and reacted with carbon dioxide and sodium hydroxide materials.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a micro-nano dissolved gas high-efficiency hardening removal device. Background Technology

[0002] Water hardness is caused by dissolved calcium and magnesium ions forming carbonates and other dissolved salts. Taking petroleum wastewater as an example, its hardness is extremely high, requiring the removal of most calcium and magnesium ions before it can be reused or discharged. Petroleum wastewater typically has high hardness due to the high concentration of magnesium and calcium ions, which can negatively impact the environment. The carbon dioxide process for reducing water hardness is an improvement on the dual-alkali method. It primarily uses sodium hydroxide to adjust the wastewater's pH to alkaline conditions. On one hand, sodium hydroxide reacts with dissolved calcium and magnesium bicarbonate in the wastewater; on the other hand, under alkaline conditions, the solubility of calcium and magnesium sulfates decreases, causing some to precipitate. Then, carbon dioxide reacts with excess calcium hydroxide to generate precipitates. These precipitates are removed from the wastewater through solid-liquid separation, thus reducing water hardness. This method mainly uses carbon dioxide as a raw material, has low operating costs, produces little sludge, and does not introduce sodium ions, causing salinity enrichment and increased salt content.

[0003] When using sodium hydroxide and carbon dioxide to reduce the hardness of wastewater, if the wastewater cannot be fully mixed with sodium hydroxide and carbon dioxide, the reaction rate may slow down, resulting in a slower rate of hardness degradation. It may also cause the products generated in the wastewater to be unevenly distributed throughout the system, which may result in some areas still having a higher than expected hardness level. Utility Model Content

[0004] The purpose of this invention is to provide a micro-nano dissolved gas high-efficiency hardening removal device, which has the advantages of circulating and mixing the wastewater inside the reaction tank at the same time, so that the wastewater can fully contact and react with carbon dioxide and sodium hydroxide, thus solving the problem that the wastewater inside the reaction tank cannot fully contact and react with carbon dioxide and sodium hydroxide.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a micro / nano dissolved gas high-efficiency hardening removal device, comprising a reaction vessel, a bearing two embedded in the top of the reaction vessel, a fixing rod two fixedly installed on the inner ring of the bearing two, a stirring rod installed in a ring array on the outer side of a section of the fixing rod two extending into the interior of the reaction vessel, a shell installed on the top of the reaction vessel above the fixing rod two, bearing one embedded in both the upper and lower ends of the shell, a fixing rod one fixedly installed on the inner ring of the two bearings one, a paddle blade installed in a ring array on the outer side of a section of the fixing rod one located inside the shell, a water suction pipe embedded in one side of the shell, a water outlet pipe embedded in the other side of the shell, and an air inlet pipe embedded in the side of the reaction vessel.

[0006] Preferably, a bracket is installed on the top of the reaction tank on the front side of the shell, a motor is installed on the top of the bracket, the motor transmission structure is fixedly connected to the top of the first fixing rod, and the bottom of the first fixing rod is fixedly connected to the top of the second fixing rod.

[0007] Preferably, the end of the water suction pipe facing away from the shell extends into the interior of the reaction tank, and the end of the water outlet pipe facing away from the shell extends into the interior of the reaction tank.

[0008] Preferably, a water inlet pipe is embedded in the top of the reaction tank on one side of the shell, and the water inlet pipe is connected to the inside of the reaction tank. An observation window is embedded in the rear side of the reaction tank.

[0009] Preferably, a feed pipe is embedded in the side of the reaction vessel above the air inlet pipe, and the feed pipe is connected to the inside of the reaction vessel.

[0010] Preferably, a nanojet nozzle is installed at one end of the air inlet pipe that extends into the reaction vessel.

[0011] Preferably, a drain pipe is embedded in the bottom of the reaction vessel, and the drain pipe is connected to the inside of the reaction vessel.

[0012] Preferably, support plates are symmetrically welded to the bottom of the reaction tanks on both sides of the drain pipe.

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

[0014] This invention utilizes a paddle and a stirring rod. Sodium hydroxide enters the reaction tank through the feed pipe, while carbon dioxide enters the nano-jet nozzle through the inlet pipe. The nano-jet nozzle sprays carbon dioxide into the reaction tank. A motor drives a fixed rod to rotate via a transmission structure. The fixed rod rotates the paddle inside the tank, generating suction. The suction pipe draws wastewater from the bottom of the reaction tank into the tank, and the paddle transports the wastewater to the outlet pipe, which then transports it back into the reaction tank. The rotation of the fixed rod also drives a second fixed rod, which in turn rotates the stirring rod inside the reaction tank. The stirring rod mixes and agitates the wastewater and carbon dioxide, ensuring thorough contact between the wastewater and carbon dioxide. This achieves the effect of simultaneously circulating and mixing the wastewater, allowing it to fully react with the carbon dioxide and sodium hydroxide. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention from a first angle;

[0016] Figure 2 This is a two-dimensional structural diagram of the present invention from a second angle;

[0017] Figure 3 This is a three-dimensional structural diagram of the present invention from a third angle;

[0018] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0019] In the diagram: 1. Support plate; 2. Reaction vessel; 3. Observation window; 4. Feed pipe; 5. Water suction pipe; 6. Motor; 7. Bracket; 8. Shell; 9. Water outlet pipe; 10. Water inlet pipe; 11. Air inlet pipe; 12. Drain pipe; 13. Fixing rod one; 14. Bearing one; 15. Bearing two; 16. Fixing rod two; 17. Nanojet nozzle; 18. Blade; 19. Stirring rod. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0024] Example 1

[0025] like Figures 1-4As shown, this utility model proposes a micro / nano dissolved gas high-efficiency hardening device, including a reaction vessel 2. A bearing 15 is embedded in the top of the reaction vessel 2. A fixing rod 16 is fixedly installed on the inner ring of the bearing 15. A stirring rod 19 is installed in a ring array on the outer side of a section of the fixing rod 16 extending into the reaction vessel 2. A shell 8 is installed on the top of the reaction vessel 2 above the fixing rod 16. Bearings 14 are embedded in both the upper and lower ends of the shell 8. A fixing rod 13 is fixedly installed on the inner ring of each bearing 14. A paddle 18 is installed in a ring array on the outer side of a section of the fixing rod 13 inside the shell 8. The reaction vessel is located on the front side of the shell 8. A bracket 7 is installed on the top of tank 2, and a motor 6 is installed on the top of bracket 7. The transmission structure of motor 6 is fixedly connected to the top of fixed rod 13, and the bottom of fixed rod 13 is fixedly connected to the top of fixed rod 2 16. Motor 6 can drive fixed rod 13 to rotate through the transmission structure, and fixed rod 13 can drive fixed rod 2 16 to rotate. A water inlet pipe 10 is embedded in the top of reaction tank 2 on one side of shell 8. The water inlet pipe 10 is connected to the inside of reaction tank 2. An observation window 3 is embedded in the rear side of reaction tank 2. Wastewater enters the inside of reaction tank 2 through water inlet pipe 10. The water level inside reaction tank 2 can be observed through observation window 3. A suction pipe 5 is embedded on one side of the shell 8, and a discharge pipe 9 is embedded on the other side of the shell 8. The end of the suction pipe 5 facing away from the shell 8 extends into the interior of the reaction vessel 2, and the end of the discharge pipe 9 facing away from the shell 8 extends into the interior of the reaction vessel 2. The suction pipe 5 can draw up wastewater from the bottom of the reaction vessel 2. After the wastewater enters the interior of the shell 8, it is then transported into the interior of the reaction vessel 2 through the discharge pipe 9. An air inlet pipe 11 is embedded on the side of the reaction vessel 2. A nanojet nozzle 17 is installed at the end of the air inlet pipe 11 that extends into the interior of the reaction vessel 2. High-pressure carbon dioxide gas enters the air inlet pipe 11 and the air inlet pipe 11 delivers carbon dioxide to the nanojet nozzle. The nozzle 17, a nano-jet nozzle, transforms carbon dioxide into nanobubbles and delivers them into the reaction vessel 2. A feed pipe 4 is embedded in the side of the reaction vessel 2 above the inlet pipe 11. The feed pipe 4 is connected to the inside of the reaction vessel 2, and sodium hydroxide material enters the inside of the reaction vessel 2 through the feed pipe 4, increasing the pH value of the wastewater inside the reaction vessel 2. A drain pipe 12 is embedded in the bottom of the reaction vessel 2 and is connected to the inside of the reaction vessel 2. The wastewater from the reaction in the reaction vessel 2 after the reaction is completed is discharged through the drain pipe 12. Support plates 1 are symmetrically welded to the bottom of the reaction vessel 2 on both sides of the drain pipe 12, and the two support plates 1 provide support for the reaction vessel 2.

[0026] Working principle: Wastewater enters the reaction tank 2 through the inlet pipe 10. The water level inside the reaction tank 2 can be observed through the observation window 3. Sodium hydroxide material enters the reaction tank 2 through the feed pipe 4, increasing the pH value of the wastewater inside the reaction tank 2. High-pressure carbon dioxide gas enters the inlet pipe 11, which delivers the carbon dioxide to the nanojet nozzle 17. The nanojet nozzle 17 turns the carbon dioxide into nanobubbles and delivers them into the reaction tank 2. The carbon dioxide nanobubbles come into contact with the wastewater inside the reaction tank 2. Sodium hydroxide reacts with the dissolved calcium bicarbonate and magnesium bicarbonate in the wastewater. On the other hand, under alkaline conditions, the solubility of calcium and magnesium ions in sulfate decreases, and some precipitates are formed. Then, the carbon dioxide nanobubbles react with excess calcium hydroxide to generate precipitates. The reaction occurs, and during the reaction, the motor 6 drives the fixed rod 13 to rotate through the transmission structure. The fixed rod 13 drives the paddle 18 inside the shell 8 to rotate. When the paddle 18 rotates, it generates suction. The suction pipe 5 draws the wastewater from the bottom of the reaction tank 2 into the shell 8. The paddle 18 transports the wastewater inside the shell 8 to the outlet pipe 9. The outlet pipe 9 transports the wastewater into the reaction tank 2. When the fixed rod 13 rotates, it drives the fixed rod 2 16 to rotate. The fixed rod 2 16 drives the stirring rod 19 inside the reaction tank 2 to rotate. The stirring rod 19 mixes and stirs the wastewater and carbon dioxide bubbles inside the reaction tank 2, so that the wastewater and carbon dioxide bubbles are in full contact. The wastewater that has completed the reaction inside the reaction tank 2 is discharged from the drain pipe 12 into the sedimentation tank for sedimentation.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A micro / nano dissolved gas high-efficiency hardening removal device, comprising a reaction vessel (2), characterized in that: The top of the reaction vessel (2) is fitted with a bearing 2 (15), and a fixing rod 2 (16) is fixedly installed on the inner ring of the bearing 2 (15). A stirring rod (19) is installed on the outer side of the section of the fixing rod 2 (16) extending into the interior of the reaction vessel (2). A shell (8) is installed on the top of the reaction vessel (2) above the fixing rod 2 (16). Bearing 1 (14) is fitted with both the upper and lower ends of the shell (8). A fixing rod 1 (13) is fixedly installed on the inner ring of the two bearings 1 (14). A paddle (18) is installed on the outer side of the section of the fixing rod 1 (13) inside the shell (8) in a ring. A water suction pipe (5) is fitted with one side of the shell (8), and a water outlet pipe (9) is fitted with the other side of the shell (8). An air inlet pipe (11) is fitted with the side of the reaction vessel (2).

2. The micro / nano dissolved gas high-efficiency hardening removal device according to claim 1, characterized in that: A bracket (7) is installed on the top of the reaction vessel (2) on the front side of the shell (8). A motor (6) is installed on the top of the bracket (7). The transmission structure of the motor (6) is fixedly connected to the top of the first fixing rod (13). The bottom of the first fixing rod (13) is fixedly connected to the top of the second fixing rod (16).

3. The micro / nano dissolved gas high-efficiency hardening removal device according to claim 1, characterized in that: The end of the water suction pipe (5) facing away from the shell (8) extends into the interior of the reaction tank (2), and the end of the water outlet pipe (9) facing away from the shell (8) extends into the interior of the reaction tank (2).

4. The micro / nano dissolved gas high-efficiency hardening removal device according to claim 1, characterized in that: A water inlet pipe (10) is embedded in the top of the reaction tank (2) on one side of the shell (8). The water inlet pipe (10) is connected to the inside of the reaction tank (2). An observation window (3) is embedded in the rear side of the reaction tank (2).

5. The micro / nano dissolved gas high-efficiency hardening removal device according to claim 1, characterized in that: A feed pipe (4) is embedded in the side of the reaction vessel (2) above the air inlet pipe (11), and the feed pipe (4) is connected to the inside of the reaction vessel (2).

6. The micro / nano dissolved gas high-efficiency hardening removal device according to claim 1, characterized in that: The air inlet pipe (11) is fitted with a nanojet nozzle (17) at one end that extends into the reaction vessel (2).

7. The micro / nano dissolved gas high-efficiency hardening removal device according to claim 1, characterized in that: The bottom of the reaction vessel (2) is fitted with a drain pipe (12), which is connected to the inside of the reaction vessel (2).

8. The micro / nano dissolved gas high-efficiency hardening removal device according to claim 7, characterized in that: Support plates (1) are symmetrically welded to the bottom of the reaction tanks (2) on both sides of the drain pipe (12).

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