High-speed stripping ammonia removal device

Abstract

The utility model discloses a high-speed stripping ammonia removal device which comprises a stripping tower, a mixing tank and a delivery pump, a feeding pipe, a high-pressure air pipe and a discharging pipe are arranged on the mixing tank, the high-pressure air pipe penetrates through the mixing tank and extends to the bottom of the mixing tank, the discharging pipe is located at the top of the mixing tank, the feeding pipe is located at the bottom of the mixing tank, and the delivery pump is located on the feeding pipe. An exhaust pipe is arranged at the top of the air stripping tower, a demister, a spraying pipe, an air inlet pipe and a liquid discharging pipe are sequentially arranged in the air stripping tower from top to bottom, the spraying pipe is communicated with the discharging pipe, a liquid collecting pool is arranged at the bottom of the air stripping tower, the liquid discharging pipe is located at the bottom of the liquid collecting pool, an exhaust fan is arranged at the tail end of the exhaust pipe, and the air stripping tower discharges air inwards through the air inlet pipe. According to the utility model, the dissolution of ammonia gas is accelerated by utilizing bubbles, so that the stripping ammonia removal efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonia nitrogen wastewater treatment, in particular to a high-speed blowing and stripping ammonia removal device. Background Art

[0002] Since high-concentration ammonia nitrogen wastewater (such as landfill leachate, chemical wastewater, etc.) is highly harmful to the environment and directly discharged to pollute the environment, ammonia nitrogen must be removed before it can be discharged in compliance with the standards. Patent 202120886383.2 discloses an ammonia stripping device for high-ammonia nitrogen wastewater. By setting a heating device and a spray layer in the stripping tower, the solubility is reduced and the ammonia is removed by air flow. However, the ammonia removal efficiency of this technical solution is still low and needs further improvement. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a high-speed air stripping ammonia removal device capable of improving ammonia removal efficiency.

[0004] The purpose of the utility model is achieved through the following technical solutions: a high-speed ammonia stripping device, comprising a stripping tower, a mixing tank, and a delivery pump. The mixing tank is provided with a feed pipe, a high-pressure air pipe, and a discharge pipe. The high-pressure air pipe passes through the mixing tank and extends to the bottom of the mixing tank. The discharge pipe is located at the top of the mixing tank, the feed pipe is located at the bottom of the mixing tank, the delivery pump is located on the feed pipe, an exhaust pipe is provided at the top of the stripping tower, a demister, a spray pipe, an air inlet pipe, and a drain pipe are sequentially arranged in the stripping tower from top to bottom, the spray pipe is connected to the discharge pipe, the bottom of the stripping tower is a liquid collecting tank, the drain pipe is located at the bottom of the liquid collecting tank, an exhaust fan is provided at the end of the exhaust pipe, and the stripping tower discharges air inwardly through the air inlet pipe.

[0005] Furthermore, the air outlet end of the air inlet pipe is located above the liquid collecting pool.

[0006] Furthermore, it also includes a blower, the exhaust end of the blower is connected to one end of the air inlet pipe, and the other end of the air inlet pipe passes through the stripping tower and is located below the liquid surface.

[0007] Furthermore, a partition, a motor, and a stirring paddle are also provided in the stripping tower. The partition is connected to the stripping tower, and the partition divides the lower part of the stripping tower into an upper exhaust pool and a lower liquid collecting pool. The motor is connected to the stripping tower and is located above the exhaust pool. The stirring paddle is located in the exhaust pool. The air inlet pipe is located below the liquid level in the exhaust pool. A guide pipe for connecting the liquid is provided between the exhaust pool and the liquid collecting pool. An exhaust port is provided on the stripping tower, and the exhaust port is located between the partition and the liquid collecting pool.

[0008] Furthermore, a heating jacket is provided outside the mixing tank, and a heating inner coil is provided inside the stripping tower, and the heating inner coil is located directly below the spray pipe.

[0009] The utility model has the following advantages: by passing high-pressure gas through the waste liquid, ammonia in the waste liquid is released into the air along with the bubbles, thereby greatly increasing the interface area of ​​ammonia volatilization and improving the ammonia removal efficiency in the stripping tower; the arrangement of the heating jacket and the heating inner coil on the mixing tank avoids the problem of increased solubility caused by evaporation heat absorption and improves the ammonia volatilization efficiency; the arrangement of the exhaust pool and the stirring paddle accelerates the dissolution of residual bubbles, further increases the removal amount, and improves the ammonia removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0011] In the figure, 1. stripping tower; 2. spray pipe; 3. exhaust pipe; 4. air inlet pipe; 5. demister; 6. exhaust fan; 7. mixing tank; 8. feed pipe; 9. high-pressure air pipe; 10. discharge pipe; 11. delivery pump; 12. drain pipe; 13. blower; 14. heating inner coil; 15. partition; 16. motor; 17. water baffle; 18. stirring paddle; 19. exhaust port; 20. guide pipe. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0013] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0014] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] Embodiment 1, a high-speed stripping ammonia removal device, comprising a stripping tower 1, a mixing tank 7 provided with a heating jacket, a delivery pump 11, a feed pipe 8, a high-pressure air pipe 9, a discharge pipe 10, an exhaust pipe 3, an exhaust fan 6, a demister 5, a spray pipe 2, an air inlet pipe 4, a discharge pipe 12, and a heating inner coil 14. The bottom of the mixing tank 7 is connected to the feed pipe 8, and the feed pipe 8 is connected to the waste liquid to be treated through the delivery pump 11. The high-pressure air pipe 9 passes through the top of the mixing tank 7 and extends to the middle of the bottom of the mixing tank 7. The demister 5, the spray pipe 2, the heating inner coil 14, the air inlet pipe 4. The drain pipe 12 is installed in the stripping tower 1 from top to bottom, the spray pipe 2 is connected to the discharge pipe 10, the exhaust pipe 3 is installed at the top of the stripping tower 1, and the exhaust fan 6 is installed at the end of the exhaust pipe 3. The bottom of the stripping tower 1 is a liquid collecting tank, and the drain pipe 12 is located at the bottom of the liquid collecting tank. The stripping tower 1 transports air inward through the air inlet pipe 4. At this time, the air outlet end of the air inlet pipe 4 is located above the liquid collecting tank. The heating jacket realizes the heating and temperature increase of the liquid to be treated in the mixing tank 7, and the heating inner coil 14 heats the liquid to be treated sprayed from the spray pipe 2.

[0016] Embodiment 2, as Figure 1 As shown, the difference from Example 1 is that it also includes a blower 13, a partition 15, a motor 16, a stirring paddle 18, and a water baffle 17. The partition 15 is connected to the lower part of the stripping tower 1. The partition 15 divides the lower part of the stripping tower 1 into an exhaust pool at the top and a liquid collecting pool at the bottom. The exhaust end of the blower 13 is connected to one end of the air inlet pipe 4, and the other end of the air inlet pipe 4 passes through the stripping tower 1 and is located below the liquid level of the exhaust pool. The motor 16 is connected to the stripping tower 1 and is located above the exhaust pool. The water baffle 17 installed above protects the motor 16 from being sprayed with waste liquid above. The stirring paddle 18 is located in the exhaust pool. A guide pipe 20 for connecting the liquid is installed between the exhaust pool and the liquid collecting pool, and a valve is installed on the guide pipe 20. An exhaust port 19 is opened on the side of the stripping tower 1. The exhaust port 19 is located between the partition 15 and the liquid collecting pool to discharge the gas above the liquid collecting pool. The exhaust volume of the exhaust fan 6 is greater than the intake volume of the blower 13.

[0017] The working principle of the utility model is as follows: the waste liquid to be treated is discharged into the mixing tank through the feed pipe, and the high-pressure gas is introduced into the waste liquid through the high-pressure air pipe to dissolve the air in the waste liquid. After the two phases are mixed, they are transported to the stripping tower. Under the action of pressure and the spray pipe, the waste liquid becomes tiny droplets and falls. At this time, the ammonia in the waste liquid is released into the air in two ways. One part is the ammonia naturally volatilized on the surface of the droplets, and the other part is that because the waste liquid contains a large amount of gas, bubbles are formed in the droplets and gradually move to the surface. The ammonia in the waste liquid enters the bubbles and is released into the air with the bubbles. Finally, under the action of the top exhaust fan, the air containing ammonia is discharged outside the stripping tower for treatment; because the evaporation of ammonia and water absorbs heat, the temperature below the spray pipe drops rapidly, and the temperature drop will increase the ammonia The solubility of the gas hinders the volatilization of ammonia. By arranging a heating inner coil under the spray pipe, the problem of evaporation heat absorption is avoided, and the volatilization efficiency of ammonia is improved; the air inlet pipe is installed below the liquid surface, and the exhaust volume of the exhaust fan is greater than the air intake volume of the blower, so that a negative pressure is formed in the stripping tower, which is beneficial to the volatilization of ammonia and the formation and growth of bubbles in the droplets, further improving the ammonia removal efficiency; due to the fast falling speed of the droplets, some ammonia is not released into the air and falls to the bottom of the stripping tower. By arranging a baffle to form an exhaust pool and cooperating with a stirring paddle, the dissolution of bubbles in the waste liquid is achieved and the release of residual ammonia is accelerated, further increasing the discharge amount of ammonia in the waste liquid; a valve is installed on the guide pipe 20 to control the flow between the exhaust pool and the liquid collecting pool to reduce the amount of volatilized ammonia in the liquid collecting pool.

[0018] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed air stripping ammonia removal device, characterized in that: The invention comprises a stripping tower (1), a mixing tank (7), and a delivery pump (11); the mixing tank (7) is provided with a feed pipe (8), a high-pressure air pipe (9), and a discharge pipe (10); the high-pressure air pipe (9) passes through the mixing tank (7) and extends to the bottom of the mixing tank (7); the discharge pipe (10) is located at the top of the mixing tank (7); the feed pipe (8) is located at the bottom of the mixing tank (7); the delivery pump (11) is located on the feed pipe (8); the stripping tower (1) is provided with a feed pipe (8), a high-pressure air pipe (9), and a discharge pipe (10); the high-pressure air pipe (9) passes through the mixing tank (7) and extends to the bottom of the mixing tank (7); the discharge pipe (10) is located at the top of the mixing tank (7); the feed pipe (8) is located at the bottom of the mixing tank (7); the delivery pump (11) is located on the feed pipe (8); the stripping tower ( 1) is provided with an exhaust pipe (3) at the top, and a demister (5), a spray pipe (2), an air inlet pipe (4), and a liquid discharge pipe (12) are sequentially provided in the stripping tower (1) from top to bottom, the spray pipe (2) is connected to the discharge pipe (10), the bottom of the stripping tower (1) is a liquid collecting tank, the liquid discharge pipe (12) is located at the bottom of the liquid collecting tank, an exhaust fan (6) is provided at the end of the exhaust pipe (3), and the stripping tower (1) discharges air inwardly through the air inlet pipe (4).

2. A high-speed air stripping ammonia removal device according to claim 1, characterized in that: The air outlet end of the air inlet pipe (4) is located above the liquid collecting pool.

3. A high-speed air stripping ammonia removal device according to claim 1, characterized in that: It also comprises a blower (13), the exhaust end of the blower (13) being connected to one end of the air inlet pipe (4), and the other end of the air inlet pipe (4) passing through the stripping tower (1) and being located below the liquid surface.

4. A high-speed air stripping ammonia removal device according to claim 3, characterized in that: The stripping tower (1) is further provided with a partition (15), a motor (16), and a stirring paddle (18); the partition (15) is internally connected to the stripping tower (1); the partition (15) divides the lower part of the stripping tower (1) into an upper exhaust pool and a lower liquid collecting pool; the motor (16) is internally connected to the stripping tower (1) and is located above the exhaust pool; the stirring paddle (18) is located in the exhaust pool; the air inlet pipe (4) is located below the liquid level in the exhaust pool; a flow guide pipe (20) for connecting liquid is provided between the exhaust pool and the liquid collecting pool; an exhaust port (19) is provided on the stripping tower (1); the exhaust port (19) is located between the partition (15) and the liquid collecting pool.

5. The high-speed air stripping ammonia removal device according to any one of claims 1 to 4, characterized in that: The mixing tank (7) is provided with a heating jacket outside, the stripping tower (1) is provided with a heating inner coil (14), and the heating inner coil (14) is located directly below the spray pipe (2).

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