Anti-corrosion assembly of synthetic ammonia stripping tower

Abstract

The utility model relates to the technical field of chemical industry production, and discloses a synthetic ammonia stripping tower anti-corrosion assembly, which comprises a stripping tower and a control cabinet, a base is arranged outside the control cabinet, an oxygen tank and a carbon dioxide tank are sequentially arranged at the top of the base, an oxygen pipeline is fixedly connected outside the oxygen tank, and the carbon dioxide pipeline is fixedly connected with the control cabinet. The tail part of the oxygen pipeline is fixedly connected with a mixing tank, the top of the mixing tank is provided with a motor, the output end of the motor is fixedly connected with a motor shaft, the exterior of the motor shaft is fixedly connected with a stirring blade, and the interior of the stirring blade is provided with a through preformed hole. The oxygen content is increased aiming at the reducibility of chemical substances in the reaction process in the stripping tower to form an oxidation film to reduce corrosion, the mixing tank is used for fully mixing oxygen and carbon dioxide and then injecting the mixture into the stripping tower, so that the oxidation film is formed in the stripping tower, and the problem of corrosion existing in the use process of an existing synthetic ammonia stripping tower is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to an anti-corrosion component of a synthetic ammonia stripping tower. Background Art

[0002] The ammonia stripping tower utilizes the mass transfer process between steam and ammonia in the wastewater to volatilize ammonia from the wastewater and enter the condenser with the steam for condensation recovery. The chemical substances produced in the production process have a strong corrosive effect on steel, mainly from carbamic acid in the solution, that is, a solution containing NH3 and CO2, especially high-temperature and high-concentration liquid A, urea liquid A and molten urea, which have a strong corrosive effect on most metals.

[0003] The main source of corrosion is the reducing property of carbamate COONH2-, which destroys the oxide film on the surface of stainless steel. The reason why stainless steel is resistant to corrosion in corrosive media is that a protective oxide film is formed on the metal surface. As long as this oxide film is not destroyed, the corrosion rate of the metal is not uncontrollable. For this reason, we propose an anti-corrosion component for synthetic ammonia stripping tower. Utility Model Content

[0004] In view of the shortcomings of corrosion in the use of synthetic ammonia stripping towers in the prior art, the utility model provides a synthetic ammonia stripping tower anti-corrosion component, which has the advantages of increasing the oxygen content to form an oxide film to reduce rust according to the reducing nature of chemical substances in the reaction process inside the stripping tower.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a synthetic ammonia stripping tower anti-corrosion component, comprising a stripping tower and a control cabinet, the outside of the control cabinet is provided with a base, the top of the base is provided with an oxygen tank and a carbon dioxide tank in sequence, the outside of the oxygen tank is fixedly connected to an oxygen pipeline, the tail of the oxygen pipeline is fixedly connected to a mixing tank, a motor is installed on the top of the mixing tank, the output end of the motor is fixedly connected to a motor shaft, the outside of the motor shaft is fixedly connected to a stirring blade, and the inside of the stirring blade is provided with a through reserved hole.

[0006] Preferably, a water inlet pipe and a steam pipe are sequentially arranged outside the stripping tower, and a filter is installed inside the water inlet pipe to filter impurities inside the wastewater.

[0007] Preferably, the outside of the carbon dioxide tank is fixedly connected to a pipeline, a valve is installed inside the pipeline, a corresponding gas valve is installed inside the oxygen pipeline, and a pressure gauge is installed outside the mixing tank.

[0008] Preferably, an air intake pipe is fixedly connected to the outside of the mixing tank, the air intake pipe is fixedly connected to the stripping tower, and an air intake valve is installed inside the air intake pipe.

[0009] Preferably, a mounting groove corresponding to the motor shaft is provided on the top of the mixing tank, and the motor shaft is rotatably connected to the inside of the mounting groove, and the motor shaft can drive the stirring blade to rotate.

[0010] Preferably, the stirring blade is configured as a spiral arc-shaped bending structure, and the reserved holes are provided with a plurality of evenly distributed holes, and the gas can flow through the set reserved holes.

[0011] Preferably, the height of the stirring blade is smaller than the height of the mixing tank, and the length of the stirring blade is smaller than the length of the mixing tank, and the stirring blade can drive the gas inside the mixing tank to flow.

[0012] Beneficial effects:

[0013] 1. The anti-corrosion component of the synthetic ammonia stripper fully mixes oxygen and carbon dioxide through a mixing tank and then injects them into the stripper, which promotes the formation of an oxide film inside the stripper, slows down equipment corrosion, and increases equipment service life.

[0014] 2. The anti-corrosion component of the synthetic ammonia stripping tower drives the gas flow inside the mixing tank through the stirring blades to promote gas fusion, and the reserved holes allow the gas to pass through, increasing the fluidity of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the stirring blade of the utility model.

[0017] In the figure: 1. Stripping tower; 2. Water inlet pipe; 3. Filter; 4. Steam pipe; 5. Control cabinet; 6. Base; 7. Oxygen tank; 8. Carbon dioxide tank; 9. Oxygen pipe; 10. Pipe; 11. Valve; 12. Mixing tank; 13. Motor; 14. Motor shaft; 15. Stirring blade; 16. Reserved hole; 17. Air inlet pipe; 18. Air inlet valve. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Embodiment 1

[0020] See also Figure 1-2A synthetic ammonia stripping tower anti-corrosion component includes a stripping tower 1 and a control cabinet 5. A base 6 is arranged outside the control cabinet 5, and an oxygen tank 7 and a carbon dioxide tank 8 are arranged on the top of the base 6 in sequence. An oxygen pipeline 9 is fixedly connected to the outside of the oxygen tank 7, and a mixing tank 12 is fixedly connected to the tail of the oxygen pipeline 9. A motor 13 is installed on the top of the mixing tank 12.

[0021] Among them, the outside of the stripping tower 1 is sequentially provided with a water inlet pipe 2 and a steam pipe 4, a filter 3 is installed inside the water inlet pipe 2 for filtering impurities inside the wastewater, a pipe 10 is fixedly connected to the outside of the carbon dioxide tank 8, a valve 11 is installed inside the pipe 10, a corresponding gas valve is installed inside the oxygen pipe 9, and a pressure gauge is installed outside the mixing tank 12.

[0022] Among them, the outside of the mixing tank 12 is fixedly connected to an air intake pipe 17, the air intake pipe 17 is fixedly connected to the stripping tower 1, and an air intake valve 18 is installed inside the air intake pipe 17. The top of the mixing tank 12 is provided with a mounting groove body corresponding to the motor shaft 14, and the motor shaft 14 is rotatably connected to the inside of the mounting groove body. The motor shaft 14 can drive the stirring blade 15 to rotate.

[0023] Working principle: When the anti-corrosion component of the synthetic ammonia stripping tower is in use, the ammonia-containing wastewater enters the filter 3 through the water inlet pipe 2, and is injected into the stripping tower 1 after being filtered for impurities. At the same time, steam enters the stripping tower 1 through the steam pipe, and undergoes a mass transfer process with the ammonia in the wastewater, so that the ammonia evaporates from the wastewater and enters the condenser together with the steam for condensation recovery. In this process, the amount of gas discharged from the oxygen tank 7 and the carbon dioxide tank 8 can be controlled by the control cabinet 5, and enters the mixing tank 12 through the pipeline. The oxygen and carbon dioxide are fully mixed through the mixing tank 12 and then injected into the stripping tower 1, thereby promoting the formation of an oxide film on the surface of the internal structure of the stripping tower 1, slowing down equipment corrosion, and increasing the service life of the equipment.

[0024] Embodiment 2

[0025] See also Figure 1-2 Further on the basis of the first embodiment, the output end of the motor 13 is fixedly connected to the motor shaft 14, the outside of the motor shaft 14 is fixedly connected to the stirring blade 15, the inside of the stirring blade 15 is provided with a through reserved hole 16, the stirring blade 15 is arranged as a spiral arc bending structure, and the reserved holes 16 are arranged with a plurality of evenly distributed holes, the gas can flow through the arranged reserved holes 16, the height of the stirring blade 15 is less than the height of the mixing tank 12, the length of the stirring blade 15 is less than the length of the mixing tank 12, and the stirring blade 15 can drive the gas inside the mixing tank 12 to flow.

[0026] Working principle: When the anti-corrosion component of the synthetic ammonia stripping tower is in use, the motor shaft 14 can be driven to rotate by the motor 13, so that the motor shaft 14 drives the stirring blade 15 to rotate, and then the stirring blade 15 drives the internal gas flow of the mixing tank 12 to promote gas fusion, and the reserved hole 16 can allow the gas to pass through, so that the gas flow direction is increased, and the fluidity of the gas is increased.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A synthetic ammonia stripper anti-corrosion assembly, comprising a stripper (1) and a control cabinet (5), characterized in that: The control cabinet (5) is provided with a base (6) on the outside, an oxygen tank (7) and a carbon dioxide tank (8) are provided on the top of the base (6) in sequence, an oxygen pipeline (9) is fixedly connected to the outside of the oxygen tank (7), a mixing tank (12) is fixedly connected to the tail of the oxygen pipeline (9), a motor (13) is installed on the top of the mixing tank (12), an output end of the motor (13) is fixedly connected to a motor shaft (14), a stirring blade (15) is fixedly connected to the outside of the motor shaft (14), and a through reserved hole (16) is opened inside the stirring blade (15).

2. The anti-corrosion component of a synthetic ammonia stripping tower according to claim 1, characterized in that: A water inlet pipe (2) and a steam pipe (4) are sequentially arranged outside the stripping tower (1), and a filter (3) is installed inside the water inlet pipe (2) for filtering impurities inside the wastewater.

3. The anti-corrosion component of a synthetic ammonia stripping tower according to claim 1, characterized in that: The outside of the carbon dioxide tank (8) is fixedly connected to a pipeline (10), the inside of the pipeline (10) is installed with a valve (11), the inside of the oxygen pipeline (9) is installed with a corresponding gas valve, and the outside of the mixing tank (12) is installed with a pressure gauge.

4. The anti-corrosion component of a synthetic ammonia stripping tower according to claim 1, characterized in that: An air intake pipe (17) is fixedly connected to the outside of the mixing tank (12), the air intake pipe (17) is fixedly connected to the stripping tower (1), and an air intake valve (18) is installed inside the air intake pipe (17).

5. The anti-corrosion component of a synthetic ammonia stripping tower according to claim 1, characterized in that: A mounting groove body corresponding to the motor shaft (14) is provided on the top of the mixing tank (12), and the motor shaft (14) is rotatably connected to the inside of the mounting groove body.

6. The anti-corrosion component of a synthetic ammonia stripping tower according to claim 1, characterized in that: The stirring blade (15) is configured as a spiral arc-shaped bending structure, and a plurality of the reserved holes (16) are evenly distributed.

7. The anti-corrosion component of a synthetic ammonia stripping tower according to claim 1, characterized in that: The height of the stirring blade (15) is smaller than the height of the mixing tank (12), and the length of the stirring blade (15) is smaller than the length of the mixing tank (12).

Images