Device for reducing water carried at top of deaerator in ammonia synthesis process
By adopting a spray assembly and film-forming device diversion structure in the ammonia synthesis unit, the problem of water carryover at the top of the deaerator was solved, achieving uniform spraying of demineralized water and efficient deoxygenation, ensuring the safe and stable operation of the ammonia synthesis unit and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2026-03-20
AI Technical Summary
In ammonia synthesis units, increased load on the deoxygenation tank leads to intermittent water spraying at the top of the deoxygenator, resulting in water waste, equipment safety threats, and affecting the stable operation of the unit.
The system employs a spray assembly and a film-forming device diversion structure. The spray assembly diverts the demineralized water to the diversion box, reducing the output flow rate of the film-forming device. The spray assembly is equipped with atomizing nozzles and a turbulence structure to ensure that the demineralized water is evenly sprayed onto the water distribution tray and fully contacts the steam, thereby optimizing the deoxygenation effect.
It effectively solves the problem of water carryover at the top of the deaerator, reduces water waste, improves deoxygenation efficiency, ensures safe and stable operation of the device, and reduces the risk of equipment failure and maintenance costs.
Smart Images
Figure CN224015336U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to synthetic ammonia equipment technical field, concretely is a device that reduces water at the top of deaerator in synthetic ammonia process. BACKGROUND
[0002] In the synthetic ammonia production process, the deoxygenation tank is one of the key equipment, and its deoxygenation effect directly affects the stable operation of the synthetic ammonia device and the product quality. At present, the synthetic ammonia device generally adopts the medium-pressure rotary membrane deoxidation technology, and the working principle of the deoxygenation head of the deoxygenation tank is based on the efficient mixing and heating of desalted water and steam to realize deoxygenation. Specifically, the desalted water enters the membrane water chamber of the deoxygenation head from the pipe opening, and under the action of a certain pressure difference, it is sprayed obliquely from the membrane tube small hole to the inner hole to form a jet. At this time, since the inner hole is full of rising heated steam, the water will absorb a large amount of steam in the jet movement, and the water temperature will be greatly increased in a very short time and a very small stroke. The rotating water continues to rotate along the inner hole wall of the membrane tube to form a rolling water film skirt, and ideal heat and mass transfer is realized in the turbulent state, so that the water temperature reaches the saturation temperature, thereby separating oxygen. The oxygen is discharged from the exhaust pipe to the atmosphere along with the rising steam. The water that is coarsely deoxygenated by the membrane section flows to the water distribution plate for secondary distribution, and then fully contacts with the 0.2MPa steam in the reverse direction in the filler section, and then flows into the water tank after deep deoxygenation.
[0003] However, with the increase of the production capacity of the synthetic ammonia device, the load of the deoxygenation tank is continuously increased. The actual operation data shows that when the water supply amount of the deoxygenation tank reaches 145t / h, intermittent water spraying phenomenon will occur at the exhaust port at the top of the deoxygenation tank. This phenomenon not only causes waste of water resources, but also has adverse effects on the surrounding equipment and environment. This problem seriously threatens the safe and stable operation of the device, increases the equipment maintenance cost, and may also cause faults in the subsequent production link, so an effective solution is needed to reduce the water at the top of the deoxygenator and ensure the efficient and stable operation of the synthetic ammonia device.
[0004] In view of the above problems, the present application provides a device for reducing water at the top of a deaerator in a synthetic ammonia process. SUMMARY
[0005] The utility model discloses a device for reducing water at the top of a deaerator in a synthetic ammonia process.
[0006] The utility model discloses a device for reducing water at the top of a deaerator in a synthetic ammonia process.
[0007] A device for reducing water carryover at the top of a deaerator in a synthetic ammonia process includes a deaerator tank, a spray assembly, a film generator, a water distribution tray, a packing layer, and a diversion box. The film generator, the spray assembly, the water distribution tray, and the packing layer are all located inside the deaerator tank and are distributed sequentially from top to bottom. The diversion box is located on one side of the deaerator tank. The deaerator tank is equipped with an exhaust port and a liquid drain port. The distance between the spray assembly and the water distribution tray is 1250 mm.
[0008] Furthermore, the spray assembly includes a mounting bracket fixed to the inner wall of the deoxygenation tank, a spray pipe fixed on the mounting bracket, a plurality of evenly distributed atomizing nozzles at the bottom of the spray pipe, a water pump on the distribution box, an inlet pipe connected to the spray pipe with one end penetrating the deoxygenation tank and connected to the outlet end of the water pump, and a suction pipe connected to the outlet end of the water pump with one end penetrating into the interior of the distribution box.
[0009] Furthermore, the number of atomizing nozzles is five, with four of the atomizing nozzles located on the same circumference, and the other atomizing nozzle located in the middle of the four atomizing nozzles, wherein the diameter of the circle formed between the four atomizing nozzles is Ø1000mm.
[0010] Furthermore, the inlet end of the film-forming device is provided with an inlet pipe two that penetrates the deoxygenation tank. The film-forming device is connected to a diversion pipe, one end of which penetrates the deoxygenation tank and is located inside the diversion box. The film-forming device can divert the demineralized water with a flow rate of 20-25 t / h from the inlet pipe two to the diversion box and reduce the output flow rate of the film-forming device to 120-145 t / h.
[0011] Furthermore, the fixing frame is made of high-strength stainless steel with a rust-proof surface, and the fixing frame is located on the stripping section of the deoxygenation tank.
[0012] Furthermore, an electric regulating valve is installed inside the second liquid inlet pipe.
[0013] Furthermore, the atomizing nozzle has an internal turbulence structure.
[0014] Furthermore, the aerodynamic mechanism consists of staggered baffles.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. The scheme is through the membrane former, the desalted water of the second liquid inlet pipe is shunted to the shunt box, the output flow of the membrane former is reduced from 145 t / h to 120 t / h, the load of the membrane former is reduced, the intermittent water spraying problem of the exhaust port at the top of the deoxidizing tank is solved from the root, the damage to the surrounding equipment is prevented, the equipment failure risk is reduced, and the safe and stable operation of the synthetic ammonia device is ensured.
[0017] 2. In the scheme, the distance between the atomizing nozzle of the spray assembly and the water spraying disc is set to 1250mm, the number and layout of the atomizing nozzles are reasonable, there are five atomizing nozzles, four of which are on the same circumference and one is in the middle, the four nozzles form a circle with a diameter of 1000mm, the desalted water can be uniformly sprayed to the water spraying disc, the contact area of the desalted water and the steam is expanded, at the same time, the atomizing nozzle is internally provided with a turbulence structure of staggered baffles, the atomizing effect of the desalted water is enhanced, the desalted water is fully contacted with the steam in the reverse direction in the filler layer, the thermal deoxidization efficiency is improved, and the dissolved oxygen of the outlet feed water is ensured to be within the index range.
[0018] 3. The scheme solves the problem of water at the top, avoids the waste of water resources, reduces the loss of water resources caused by water spraying at the top, and reduces the additional cost caused by equipment failure and maintenance, including equipment repair cost, loss during shutdown and the like, and reduces the overall cost of synthetic ammonia production.
[0019] 4. In the scheme, the electric regulating valve is arranged in the second liquid inlet pipe, the amount of desalted water entering the membrane former can be flexibly adjusted according to the actual production demand, and then the water amount shunted to the shunt box and the output flow of the membrane former can be accurately controlled, so that the device can better adapt to different production loads and working condition changes in the synthetic ammonia process, and the applicability and flexibility of the device are improved. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model
[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model
[0023] In the figure: 1, deoxidizing tank; 11, exhaust port; 12, liquid discharge port; 2, spray assembly; 21, fixed frame; 22, spray pipe; 23, atomizing nozzle; 24, first liquid inlet pipe; 3, membrane former; 31, second liquid inlet pipe; 32, shunt pipe; 4, water spraying disc; 5, filler layer; 6, shunt box; 61, water pump; 62, liquid suction pipe. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model.
[0025] The application provides a device for reducing water carrying at the top of a deaerator in a synthetic ammonia process. Figures 1-3 Detailed description will be given below: Embodiment
[0026] The device for reducing water carrying at the top of a deaerator in a synthetic ammonia process comprises a deaeration tank 1, a spraying assembly 2, a film former 3, a water spraying tray 4, a filler layer 5 and a flow divider 6.
[0027] The device has multiple beneficial effects.
[0028] Specifically, please refer to Figure 2 and Figure 3, the spray assembly 2 comprises a fixed frame 21 fixed on the inner wall of the deoxidizing tank 1, the fixed frame 21 is fixed with a spray pipe 22, the bottom of the spray pipe 22 is provided with a plurality of uniform distribution atomizing nozzles 23, so that the layout of the atomizing nozzles 23 can realize uniform spraying of the desalted water, the water pump 61 is arranged on the shunt box 6, the spray pipe 22 is connected with a liquid inlet pipe one 24 which penetrates through the deoxidizing tank 1 and is connected with the outlet end of the water pump 61, the outlet end of the water pump 61 is connected with a liquid pumping pipe 62 which penetrates into the inside of the shunt box 6, in the operation mode, when the device runs, the desalted water in the shunt box 6 is extracted to the outlet end of the water pump 61 under the power action of the water pump 61, then the desalted water enters the spray pipe 22 along the liquid inlet pipe one 24, because the atomizing nozzles 23 are installed at the bottom of the spray pipe 22, the desalted water is sprayed from the atomizing nozzles 23 under the action of pressure, forming uniform atomizing effect, and then uniformly spraying in the area below, the uniform distribution atomizing nozzles 23 cooperate with reasonable pipeline connection and power delivery of the water pump 61, which ensures that the desalted water can be uniformly and fully atomized, providing a strong guarantee for the subsequent full contact of the filler layer 5 with the steam and efficient deoxidization, which helps to improve the deoxidization efficiency and ensure the quality of water in the synthetic ammonia process;
[0029] The fixed frame 21 is made of high-strength stainless steel material, and the surface is treated by rust prevention, the fixed frame 21 made of high-strength stainless steel material and treated by rust prevention can effectively resist the corrosive medium in the deoxidizing tank 1, greatly prolonging the service life of the fixed frame 21 and the whole spray assembly 2, reducing the frequency of equipment maintenance and replacement, and reducing the maintenance cost.
[0030] Further, please refer to Figure 2 and Figure 3 , the inlet end of the film former 3 is provided with a liquid inlet pipe two 31 penetrating through the deoxidizing tank 1, the film former 3 is connected with a shunt pipe 32, one end of the shunt pipe 32 penetrates through the deoxidizing tank 1 and is located in the inside of the shunt box 6, the film former 3 can shunt the desalted water with a flow of 20-25t / h in the liquid inlet pipe two 31 into the shunt box 6, and reduce the output flow of the film former 3 to 120-145t / h; the inside of the liquid inlet pipe two 31 is provided with an electric regulating valve;
[0031] When the device runs, the desalted water flows to the film former 3 through the liquid inlet pipe two 31, at this time, the electric regulating valve adjusts the opening degree according to the preset parameters or the actual operation demand, and accurately controls the amount of desalted water entering the film former 3, when the synthetic ammonia device is in a specific working condition, the water supply amount of the deoxidizing tank 1 is high, the film former 3 will shunt the desalted water with a flow of 20-25t / h in the liquid inlet pipe two 31 into the shunt box 6 by means of the regulation and control of the electric regulating valve, in this way, the amount of desalted water entering the film former 3 for the subsequent deoxidization process is reduced, so that the output flow of the film former 3 is reduced from the original level of more than 145t / h to the range of 120-145t / h;
[0032] This structure design and operation mode brings significant beneficial effects, from the aspect of equipment operation stability, by shunting operation to reduce the output flow of the film former 3, effectively alleviates the working pressure of the film former 3 under high load, avoids the situation that the desalinated water cannot complete the oxygen removal separation process in time due to the too high load of the film former 3, and then is carried to the top of the deoxidizing tank 1 by steam, successfully solves the intermittent water spraying problem of the exhaust port 11 at the top of the deoxidizing tank, greatly improves the safety and stability of the operation of the synthetic ammonia device, in the precision of flow regulation, the electric regulating valve inside the inlet pipe two 31 can accurately adjust the desalinated water flow in real time according to the actual working condition, so that the shunting operation of the film former 3 is more scientific and reasonable, not only adapts to the changing needs of different production loads in the synthetic ammonia process, but also further optimizes the operation efficiency of the entire oxygen removal system, improves the oxygen removal effect, and ensures the smooth progress of the subsequent synthetic ammonia production link. Embodiment
[0033] Embodiment two is a further optimization of embodiment one, please refer to Figure 2 and Figure 3 The number of atomizing nozzles 23 is five, and four of them are located on the same circumference, and the other one is located in the middle of the four atomizing nozzles 23, and the diameter of the circle formed between the four atomizing nozzles 23 is Ø1000mm.
[0034] The inside of the atomizing nozzle 23 is provided with a turbulence structure; the turbulence structure is a staggered baffle.
[0035] When the desalinated water enters the atomizing nozzle 23 through the spray pipe 22, the desalinated water first contacts the staggered baffles inside, which change the flow path and speed of the desalinated water, so that the desalinated water forms a turbulent state inside the nozzle. After the desalinated water in this turbulent state is sprayed out of the nozzle, the atomization effect is greatly enhanced. The five atomizing nozzles 23 work together, the four atomizing nozzles 23 on the circumference and the one atomizing nozzle 23 in the middle spray atomized desalinated water that complements each other, forming a more uniform spraying area below, ensuring that the desalinated water can be more fully and uniformly sprayed onto the water tray 4;
[0036] The optimization design brings many benefits. From the aspect of improving atomization effect, the internal turbulence structure makes the atomization degree of desalted water higher, increasing the contact area of desalted water and steam, which is crucial for the subsequent thermal deoxidization process in the filler layer 5. The larger contact area means more efficient heat and mass transfer, so that the dissolved oxygen in the water can be removed more thoroughly, improving the deoxidization efficiency and ensuring the quality of water used in the synthetic ammonia process. In terms of spraying uniformity, the special layout of the five atomizing nozzles 23, i.e. four circumferentially distributed and one in the middle with a circumferential diameter of 1000mm, makes the desalted water cover a wider range and distribute more evenly during spraying. Compared with the first embodiment, this layout effectively avoids the problem of local over-concentration or over-dilution that may occur during spraying, further optimizing the deoxidization effect and ensuring the operation of the entire deoxidization device to be more stable and reliable. In addition, the optimized layout of the atomizing nozzles 23 and the turbulence structure design improve the adaptability of the device to different working conditions. When the load of the synthetic ammonia device changes, the device can still maintain good deoxidization performance, reducing the influence of working condition fluctuations on the deoxidization effect and ensuring the continuity and stability of synthetic ammonia production.
[0037] When the device is in operation:
[0038] During the synthetic ammonia production process, when the device is in operation, the desalted water first enters the liquid inlet pipe two 31. The electric regulating valve in the pipe adjusts the opening degree according to the preset parameters or actual working conditions, accurately controlling the water flow into the film former 3. When the deoxidization tank has a high water supply, the film former 3 divides 20-25t / h of desalted water from the liquid inlet pipe two 31 into the shunt box 6, and the output flow of the film former 3 decreases from more than 145t / h to 120-145t / h. The desalted water in the shunt box 6 is pumped to the water pump outlet by the liquid pumping pipe 62 under the action of the water pump 61, and then enters the spray pipe 22 along the liquid inlet pipe one 24. After the desalted water enters the atomizing nozzle 23, it forms turbulent flow under the influence of the internal staggered baffle, and the atomization effect is enhanced. The five atomizing nozzles work together, with four circumferentially distributed and one in the middle. The atomized desalted water sprayed out complements each other and is uniformly sprayed onto the water shower tray 4 at a height of 1250mm below. The desalted water is uniformly distributed by the water shower tray 4 and then flows into the filler layer 5, where it is fully contacted with steam in the reverse direction to complete deep deoxidization. The deoxidized water is discharged from the liquid outlet 12 for subsequent processes, and the separated gas is discharged through the gas outlet 11.
[0039] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent substitutions or changes within the technical scope disclosed by the present application according to the technical scheme and concept of the present application, which should be covered within the protection scope of the present application.
Claims
1. A device for reducing water carryover at the top of the deaerator in an ammonia synthesis process, characterized in that, The device includes a deoxygenation tank (1), a spray assembly (2), a film generator (3), a water spray tray (4), a packing layer (5), and a distribution box (6). The film generator (3), the spray assembly (2), the water spray tray (4), and the packing layer (5) are all located inside the deoxygenation tank (1) and are distributed from top to bottom. The distribution box (6) is located on one side of the deoxygenation tank (1). The deoxygenation tank (1) is equipped with an exhaust port (11) and a drain port (12). The distance between the spray assembly (2) and the water spray tray (4) is 1250 mm.
2. The device for reducing water carryover at the top of the deaerator in a synthetic ammonia process according to claim 1, characterized in that: The spray assembly (2) includes a fixing frame (21) fixed on the inner wall of the deoxygenating tank (1), a spray pipe (22) fixed on the fixing frame (21), a number of evenly distributed atomizing nozzles (23) are provided at the bottom of the spray pipe (22), a water pump (61) is provided on the distribution box (6), an inlet pipe (24) is connected to the spray pipe (22) with one end penetrating through the deoxygenating tank (1) and connected to the liquid outlet end of the water pump (61), and a suction pipe (62) with one end penetrating into the interior of the distribution box (6) is connected to the liquid outlet end of the water pump (61).
3. The device for reducing water carryover at the top of the deaerator in a synthetic ammonia process according to claim 2, characterized in that: The number of atomizing nozzles (23) is five, and four of the atomizing nozzles (23) are located on the same circumference, and the other atomizing nozzle (23) is located in the middle of the four atomizing nozzles (23), wherein the diameter of the circle formed between the four atomizing nozzles (23) is Ø1000mm.
4. The device for reducing water carryover at the top of the deaerator in a synthetic ammonia process according to claim 1, characterized in that: The inlet end of the film-forming device (3) is provided with an inlet pipe two (31) that penetrates the deoxygenation tank (1). The film-forming device (3) is connected to a diversion pipe (32). One end of the diversion pipe (32) penetrates the deoxygenation tank (1) and is located inside the diversion box (6). The film-forming device (3) can divert the demineralized water with a flow rate of 20-25 t / h from the inlet pipe two (31) to the diversion box (6) and reduce the output flow rate of the film-forming device (3) to 120-145 t / h.
5. The device for reducing water carryover at the top of the deaerator in a synthetic ammonia process according to claim 2, characterized in that: The fixing frame (21) is made of high-strength stainless steel and the surface is treated with anti-rust. The fixing frame (21) is located on the stripping section of the deoxygenator (1).
6. The device for reducing water carryover at the top of the deaerator in a synthetic ammonia process according to claim 4, characterized in that: An electric regulating valve is installed inside the liquid inlet pipe 2 (31).
7. The device for reducing water carryover at the top of the deaerator in a synthetic ammonia process according to claim 2, characterized in that: The atomizing nozzle (23) has an internal turbulence structure.
8. The device for reducing water carryover at the top of the deaerator in a synthetic ammonia process according to claim 7, characterized in that: The aerodynamic mechanism consists of staggered baffles.