Steam return water cooling device of ammonia water evaporator
By designing the spray head spraying water mist and rotary flow blocking plate structure in the ammonia evaporator, the steam flow rate is slowed down and the contact time between steam and water mist is extended, the problem of low steam cooling efficiency is solved, and the ammonia water vaporization and denitrification effect are improved .
Patent Information
- Application Number
- CN202420814010.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-19
AI Technical Summary
The fast steam circulation speed in existing ammonia evaporators leads to low cooling efficiency, affecting the amount of ammonia vaporization and denitrification effect.
A steam return water cooling device for ammonia evaporator is designed, and a spray nozzle is used to spray water mist to cool the steam, which slows down the steam circulation speed through the rotating ring and the flow blocking plate, extends the contact time between steam and water mist, and improves liquefaction efficiency.
It effectively improves the steam cooling efficiency, increases the amount of ammonia vaporization, and improves the denitrification effect.
Smart Images
Figure CN222218615U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ammonia water evaporators, in particular to a steam return water cooling device for an ammonia water evaporator. Background Art
[0002] The SCR denitration reactor in the coking plant uses an ammonia evaporator to gasify ammonia as a reducing agent to reduce nitrogen oxides to nitrogen gas by reacting with the catalyst. The ammonia evaporator generally uses water vapor as a heat source to evaporate ammonia, and the water vapor return water needs to be cooled and recycled. During the water vapor cooling process, the circulation speed is fast, resulting in untimely cooling of the water vapor, unsmooth steam return water discharge, small exhaust volume of the ammonia evaporator, insufficient ammonia gasification, and affecting the denitration effect. Utility Model Content
[0003] The utility model aims to solve the shortcoming in the prior art that the fast steam circulation speed affects the cooling efficiency, and proposes a steam return water cooling device for an ammonia evaporator.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A steam return water cooling device for an ammonia evaporator is designed, comprising a shell, wherein an inlet pipe is fixedly installed at one end of the shell, and a water outlet pipe is fixedly installed at the other end, a spray ring is fixedly installed at the top of the inner side of the shell, a nozzle is fixedly installed on the inner surface of the spray ring, a rotating ring is also rotatably installed inside the shell, a first baffle is fixedly installed at one end of the rotating ring, and a second baffle is fixedly installed at the other end, circulation holes and water filtering holes are provided inside the first baffle and the second baffle, a gear ring is fixedly installed on the outer surface of the rotating ring, a spur gear is rotatably installed inside the top of the shell, and the spur gear is meshed and connected with the gear ring.
[0006] Preferably, the first spoiler is rotated 90° and has the same structure as the second spoiler.
[0007] Preferably, the first spoiler, the second spoiler, the rotating ring and the gear ring are all coaxially arranged.
[0008] Preferably, a fan is fixedly mounted on the top of the shell, a return pipe is fixedly connected to the end of the fan, and the end of the return pipe extends to one side of the rotating circle and is connected to the inside of the shell.
[0009] Preferably, the central axis of the spray ring does not coincide with the central axis of the inner cavity of the shell, and a gap is left between the bottom of the spray ring and the bottom of the inner cavity of the shell.
[0010] The utility model provides an ammonia evaporator steam return water cooling device, which has the beneficial effect that: during the operation of the ammonia evaporator steam return water cooling device, the water mist sprayed from the nozzle can cool the steam, the spur gear can drive the rotating circle to rotate through the gear ring, the rotation of the rotating circle can drive the first baffle plate and the second baffle plate to rotate, when the steam passes through the first baffle plate and the second baffle plate, the flow holes in the rotation process can slow down the speed of the steam passing through, the contact time between the steam and the water mist can be prolonged, and the efficiency of the steam liquefaction can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the structure of a steam return water cooling device for an ammonia evaporator proposed by the utility model;
[0012] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;
[0013] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at BB in the middle.
[0014] In the figure: 1. Shell; 2. Spray circle; 3. Spray head; 4. Rotating circle; 5. First baffle plate; 6. Second baffle plate; 7. Flow hole; 8. Water filter hole; 9. Gear ring; 10. Spur gear; 11. Return pipe; 12. Fan; 13. Inlet pipe; 14. Outlet pipe. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0016] Example 1
[0017] Reference Figure 1-3, a steam return water cooling device for an ammonia evaporator comprises a shell 1, an inlet pipe 13 is fixedly installed at one end of the shell 1, and an outlet pipe 14 is fixedly installed at the other end. The steam inside the ammonia evaporator enters the shell 1 through the inlet pipe 13, and the water flow after the steam is cooled will be discharged through the outlet pipe 14. A spray ring 2 is fixedly installed on the top of the inner side of the shell 1, and the spray ring 2 is connected to an external water supply device through a water pipe. A nozzle 3 is fixedly installed on the inner surface of the spray ring 2, and water mist can be sprayed through the nozzle 3 to cool the steam. The central axis of the spray ring 2 does not coincide with the central axis of the inner cavity of the shell 1. A gap is left between the bottom of the spray ring 2 and the bottom of the inner cavity of the shell 1. The steam liquefies into liquid when in contact with the water mist, and the liquid can flow out from the outlet pipe 14 through the bottom of the shell 1. A plurality of nozzles 3 are provided and distributed in a circular array along the spray ring 2. The water mist sprayed by the nozzle 3 can be evenly distributed in the inner cavity of the shell 1, and the steam can fully contact with the water mist during the circulation process, so the cooling effect is good.
[0018] A rotating ring 4 is also rotatably installed inside the housing 1, a first baffle 5 is fixedly installed at one end of the rotating ring 4, and a second baffle 6 is fixedly installed at the other end. The first baffle 5 and the second baffle 6 have a blocking effect on steam, which can slow down the speed of steam circulation. The first baffle 5 and the second baffle 6 are both provided with a flow hole 7 and a water filter hole 8. The preferred embodiment structure of the flow hole 7 and the water filter hole 8 is shown in the attached figure. Figure 2 As shown, the inside of the flow hole 7 is used for the circulation of steam, and the inside of the water filter hole 8 can not only circulate steam but also allow liquid to flow out of the rotating circle 4. The first baffle 5 has the same structure as the second baffle 6, but the angle is different. The first baffle 5 rotated 90° is exactly the same as the second baffle 6. When steam passes through the flow hole 7 inside the first baffle 5, a part of the steam will hit the inner surface of the second baffle 6, and then the steam will go out through the flow hole 7 inside the second baffle 6, which can slow down the speed of steam circulation.
[0019] A gear ring 9 is fixedly installed on the outer surface of the rotating circle 4, and a spur gear 10 is rotatably installed inside the top of the shell 1. The end of the spur gear 10 is fixedly connected to the external motor, and the spur gear 10 can be driven to rotate by the external motor. The spur gear 10 is meshed and connected with the gear ring 9. The rotation of the spur gear 10 can drive the gear ring 9 to rotate. The first spoiler 5, the second spoiler 6, the rotating circle 4 and the gear ring 9 are all coaxially arranged. The rotation of the gear ring 9 can drive the rotating circle 4 to rotate. The rotation of the rotating circle 4 can drive the first spoiler 5 and the second spoiler 6 to rotate. During the rotation of the first spoiler 5 and the second spoiler 6, the position of the flow hole 7 is constantly changing. When the steam passes through the flow hole 7 inside the first spoiler 5, the flow hole 7 is rotating, so the speed at which the steam enters the first spoiler 5 slows down. Similarly, the speed at which the steam passes through the second spoiler 6 will also slow down, which can greatly reduce the circulation speed of the steam in the shell 1, prolong the contact time between the steam and the water mist, and improve the efficiency of the steam liquefaction.
[0020] Working principle: During the operation of the ammonia evaporator steam return water cooling device, the steam inside the ammonia evaporator will enter the shell 1 through the inlet pipe 13, start the nozzle 3 to spray water mist, and drive the spur gear 10 to rotate through the external motor. The rotation of the spur gear 10 can drive the gear ring 9 to rotate, and the rotation of the gear ring 9 can drive the rotating circle 4 to rotate. The rotation of the rotating circle 4 can drive the first baffle plate 5 and the second baffle plate 6 to rotate. The water mist sprayed by the nozzle 3 can cool the steam. When the steam passes through the first baffle plate 5 and the second baffle plate 6, the flow hole 7 during the rotation process can slow down the speed of the steam passing through, which can prolong the contact time between the steam and the water mist and improve the efficiency of the steam liquefaction. Finally, the liquefied liquid is discharged through the outlet pipe 14 for recycling.
[0021] Example 2
[0022] Reference Figure 1-3 As another preferred embodiment of the utility model, on the basis of embodiment 1, a fan 12 is fixedly installed on the top of the housing 1, and a return pipe 11 is fixedly connected to the end of the fan 12. The end of the return pipe 11 extends to one side of the rotating circle 4 and is connected to the inside of the housing 1. Figure 1 As shown, the fan 12 is located above the water outlet pipe 14, and the end of the return pipe 11 is located in front of the rotating circle 4. When the fan 12 is started, the steam inside the shell 1 can be introduced into the return pipe 11, and the return pipe 11 passes the steam into one side of the rotating circle 4, so that the uncooled steam passes through the rotating circle 4 again for cooling, and the circulating cooling can fully cool the steam inside the shell 1.
[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. An ammonia evaporator steam return water cooling device, comprising a shell (1), characterized in that: The shell (1) has an inlet pipe (13) fixedly mounted on one end and a water outlet pipe (14) fixedly mounted on the other end; a spray ring (2) fixedly mounted on the top of the inner side of the shell (1); a spray head (3) fixedly mounted on the inner surface of the spray ring (2); a rotating ring (4) rotatably mounted inside the shell (1); a first baffle (5) fixedly mounted on one end of the rotating ring (4) and a second baffle (6) fixedly mounted on the other end; both the first baffle (5) and the second baffle (6) are provided with flow holes (7) and water filter holes (8); a gear ring (9) fixedly mounted on the outer surface of the rotating ring (4); a spur gear (10) rotatably mounted inside the top of the shell (1); the spur gear (10) is meshed and connected with the gear ring (9).
2. The ammonia evaporator steam return water cooling device according to claim 1, characterized in that: The first spoiler (5) is rotated 90 degrees and has the same structure as the second spoiler (6).
3. The ammonia evaporator steam return water cooling device according to claim 1, characterized in that: The first spoiler (5), the second spoiler (6), the rotating ring (4) and the gear ring (9) are all coaxially arranged.
4. The ammonia evaporator steam return water cooling device according to claim 1, characterized in that: A fan (12) is fixedly mounted on the top of the housing (1), and a return pipe (11) is fixedly connected to the end of the fan (12), and the end of the return pipe (11) extends to one side of the rotating circle (4) and is in communication with the interior of the housing (1).
5. The ammonia evaporator steam return water cooling device according to claim 1, characterized in that: The central axis of the spray ring (2) does not coincide with the central axis of the inner cavity of the shell (1), and a gap is left between the bottom of the spray ring (2) and the bottom of the inner cavity of the shell (1).