Ammonia decomposition multi-stage vaporization device
By using multi-stage vaporization components and precise heat control, the problem of insufficient ammonia decomposition and vaporization has been solved, improving gas purity and heat utilization efficiency, and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN SHUNCHANG FUBAO TENGDA CHEM
- Filing Date
- 2025-04-23
- Publication Date
- 2026-04-24
AI Technical Summary
Existing ammonia decomposition and vaporization devices suffer from incomplete ammonia vaporization and decomposition, low gas purity, and low heat utilization efficiency, resulting in high production costs.
The system employs a multi-stage vaporization assembly, including primary, secondary, and tertiary vaporizers, combined with a catalyst bed, threaded plates, flow guide holes, and heating wires. By treating the ammonia liquid in stages, it increases the gas-liquid contact area and time, precisely controls the heating zone, and achieves complete decomposition and vaporization of ammonia.
It improves gas purity, reduces energy consumption, meets high-quality production requirements, and lowers production costs.
Smart Images
Figure CN224156839U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical equipment technology, specifically to a multi-stage vaporization device for ammonia decomposition. Background Technology
[0002] Hydrogen and nitrogen produced by ammonia decomposition have wide applications in numerous fields such as chemical production and electronics manufacturing. For example, in semiconductor manufacturing, high-purity hydrogen is needed as a reducing gas to remove oxides from the chip surface; in the metallurgical industry, nitrogen is often used as a protective gas to prevent metals from being oxidized at high temperatures. The performance of a multi-stage vaporization unit for ammonia decomposition, as a key piece of equipment for achieving efficient ammonia decomposition and vaporization, directly affects the quality of subsequent gases and production efficiency.
[0003] Existing technologies suffer from the following defects or problems: Some ammonia decomposition and vaporization devices have numerous issues. Some traditional devices employ a single-stage vaporization method, resulting in insufficient vaporization and decomposition of ammonia. This leads to the presence of incompletely decomposed ammonia in the gaseous products, affecting gas purity and failing to meet the requirements of production processes with high gas quality standards. Furthermore, some existing devices are inefficient in heat utilization. Due to the lack of a reasonable heat distribution and recovery mechanism, a large amount of energy is consumed during ammonia vaporization and decomposition, increasing production costs.
[0004] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Utility Model Content
[0005] To address the shortcomings of existing technologies, this invention provides a multi-stage vaporization device for ammonia decomposition, which solves the current problems.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage vaporization device for ammonia decomposition, comprising a support plate, wherein a staged vaporization component is provided on the top of the support plate;
[0007] The staged vaporization assembly includes a primary vaporizer, which is fixedly connected to the top of the support plate. A secondary vaporizer is fixedly connected to the middle of the top side of the support plate. A support frame is fixedly connected to one side of the top of the support plate. A tertiary vaporizer is fixedly connected to the top of the support frame. An inlet pipe is fixedly connected to the top of the primary vaporizer. The inlet pipe is connected to an external equipment flange. Connecting pipes are flanged between the primary vaporizer and the secondary vaporizer, and between the secondary vaporizer and the tertiary vaporizer.
[0008] As a preferred embodiment of this utility model, the liquid inlet pipe is connected to an external heat source device, and a catalyst bed is bonded to the inner wall of the first-stage vaporizer.
[0009] As a preferred embodiment of this utility model, a fixing rod is fixedly connected to the middle of the inner side of the secondary vaporizer, and a threaded plate is fixedly connected to the outer periphery of the fixing rod. The surface of the threaded plate is provided with multiple evenly distributed guide holes.
[0010] As a preferred embodiment of this utility model, an inner cylinder is fixedly connected inside the three-stage vaporizer, and there is a gap between the inner cylinder and the inner wall of the three-stage vaporizer. An electric heating wire is sleeved on the outer wall of the inner cylinder.
[0011] As a preferred embodiment of this utility model, a diffuser is fixedly connected to the bottom of the three-stage vaporizer. The diffuser is a cone shape with a smaller top and a larger bottom. Pressure gauges are provided on the top of both the three-stage vaporizer and the first-stage vaporizer.
[0012] As a preferred embodiment of this utility model, an operation box is fixedly connected to one side of the top of the support plate, an alarm light is fixedly connected to the top of the operation box, and multiple evenly distributed data tables are fixedly connected to one side wall of the operation box.
[0013] As a preferred embodiment of this utility model, a display screen is provided on the side wall of the operation box near the data table, and a plurality of evenly distributed buttons are fixedly connected to the side wall of the operation box near the display screen.
[0014] Compared with the prior art, this utility model provides a multi-stage vaporization device for ammonia decomposition, which has the following beneficial effects:
[0015] 1. This is a multi-stage vaporization device for ammonia decomposition. The device comprises a primary vaporizer, a secondary vaporizer, and a tertiary vaporizer. Liquid ammonia enters the primary vaporizer through an inlet pipe. The catalyst bed on the inner wall of the primary vaporizer accelerates the ammonia decomposition reaction. The initially decomposed ammonia and any incompletely decomposed ammonia liquid enter the secondary vaporizer through a connecting pipe. The threaded plates on the fixed rod inside the secondary vaporizer and the guide holes on their surface increase the gas-liquid contact area and contact time, further promoting the vaporization and decomposition of ammonia. The ammonia then enters the tertiary vaporizer, where heating wires on the outer wall of the inner cylinder provide additional heat, making the ammonia decomposition and vaporization more thorough, effectively reducing incompletely decomposed ammonia in the gaseous products, and meeting the requirements of production processes with high gas quality standards.
[0016] 2. This multi-stage ammonia decomposition vaporization device connects the inlet pipe to an external heat source. In the first-stage vaporizer, the heat provided by the external heat source can be used for the initial decomposition and vaporization of ammonia. The second-stage vaporizer utilizes its structural design to enhance gas-liquid heat exchange, fully utilizing the heat not completely utilized in the first-stage vaporizer. The gap between the inner cylinder and the inner wall of the third-stage vaporizer, along with the design of the heating wire, allows for precise control of the heating zone and temperature, specifically treating the ammonia not completely vaporized in the first two stages, reducing energy waste. Overall, this forms a relatively reasonable heat distribution and utilization mechanism. Compared to existing devices with low heat utilization efficiency, this significantly reduces energy consumption, thereby lowering production costs and enhancing the company's competitiveness in the market. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0018] Figure 2 This is a schematic diagram of the support frame structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the inner cylinder structure of this utility model;
[0020] Figure 4 This utility model Figure 2 Enlarged diagram of point A in the middle.
[0021] In the diagram: 1. Support plate; 2. Diffuser; 3. Support frame; 4. Three-stage vaporizer; 5. Two-stage vaporizer; 6. Pressure gauge; 7. Connecting pipe; 8. Liquid inlet pipe; 9. First-stage vaporizer; 10. Control box; 11. Data table; 12. Alarm light; 13. Display screen; 14. Button; 15. Heating wire; 16. Inner cylinder; 17. Guide hole; 18. Threaded plate; 19. Fixing rod; 20. Catalyst bed. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] refer to Figure 1 In this embodiment: an ammonia decomposition multi-stage vaporization device includes a support plate 1, and a staged vaporization component is provided on the top of the support plate 1;
[0024] The staged vaporization assembly includes a primary vaporizer 9, which is fixedly connected to the top of the support plate 1. A secondary vaporizer 5 is fixedly connected to the middle of the top side of the support plate 1. A support frame 3 is fixedly connected to one side of the top of the support plate 1. A tertiary vaporizer 4 is fixedly connected to the top of the support frame 3. An inlet pipe 8 is fixedly connected to the top of the primary vaporizer 9. The inlet pipe 8 is connected to an external equipment flange. Connecting pipes 7 are flanged between the primary vaporizer 9 and the secondary vaporizer 5, and between the secondary vaporizer 5 and the tertiary vaporizer 4.
[0025] Specifically, liquid ammonia enters the first-stage vaporizer 9 through the inlet pipe 8. The catalyst bed 20 on the inner wall of the first-stage vaporizer 9 accelerates the decomposition reaction of ammonia. The initially decomposed ammonia and the incompletely decomposed liquid ammonia enter the second-stage vaporizer 5 through the connecting pipe 7. The threaded plate 18 on the fixed rod 19 inside the second-stage vaporizer 5 and the guide holes 17 on its surface increase the gas-liquid contact area and contact time, further promoting the vaporization and decomposition of ammonia. Then it enters the third-stage vaporizer 4. The heating wire 15 on the outer wall of the inner cylinder 16 provides additional heat, making the decomposition and vaporization of ammonia more thorough, effectively reducing the incompletely decomposed ammonia in the gaseous products, and meeting the production process with high requirements for gas quality.
[0026] refer to Figure 2 , Figure 3 and Figure 4 In this embodiment, the liquid inlet pipe 8 is connected to an external heat source device. A catalyst bed 20 is bonded to the inner wall of the first-stage vaporizer 9. A fixing rod 19 is fixedly connected to the middle of the inner side of the second-stage vaporizer 5. A threaded plate 18 is fixedly connected to the outer periphery of the fixing rod 19. Multiple evenly distributed guide holes 17 are opened on the surface of the threaded plate 18. An inner cylinder 16 is fixedly connected inside the third-stage vaporizer 4. There is a gap between the inner cylinder 16 and the inner wall of the third-stage vaporizer 4. An electric heating wire 15 is sleeved on the outer wall of the inner cylinder 16. A catalyst bed 20 is fixedly connected to the bottom of the third-stage vaporizer 4. The diffuser 2 is a cone-shaped structure with a smaller top and a larger bottom. Pressure gauges 6 are installed on the top of both the three-stage vaporizer 4 and the first-stage vaporizer 9. An operation box 10 is fixedly connected to one side of the top of the support plate 1. An alarm light 12 is fixedly connected to the top of the operation box 10. Multiple evenly distributed data meters 11 are fixedly connected to one side wall of the operation box 10. A display screen 13 is installed on the side wall of the operation box 10 near the data meters 11. Multiple evenly distributed buttons 14 are fixedly connected to the side wall of the operation box 10 near the display screen 13.
[0027] Specifically, the processed gas is discharged from the diffuser 2 at the bottom of the three-stage vaporizer 4. The diffuser 2 is conical with a smaller top and a larger bottom, and the aperture gradually increases from the inside to the outside, improving the uniformity of gas diffusion. Throughout the process, the pressure gauges 6 at the top of the first-stage vaporizer 9 and the three-stage vaporizer 4 monitor the internal pressure in real time. The control box 10 on one side of the top of the support plate 1 integrates multiple monitoring and control functions. The data table 11 on the control box 10 records various data during the reaction process, and the display screen 13 intuitively displays the data change trends for easy observation by the operator. The operator can operate the device through the button 14, such as adjusting the power of the heating wire 15 and controlling the liquid inlet flow. Once an abnormality occurs in the system, the alarm light 12 on the top of the control box 10 will light up to remind the operator to deal with it in time and ensure the safe and stable operation of the device.
[0028] The working principle and usage process of this utility model are as follows: Ammonia liquid is transported from external equipment to the first-stage vaporizer 9 through the inlet pipe 8. The inlet pipe 8 is connected to an external heat source to provide heat to the first-stage vaporizer 9. At the same time, the catalyst bed 20 on the inner wall of the first-stage vaporizer 9 accelerates the decomposition reaction of ammonia. Under the combined action of heat and catalyst, the ammonia liquid begins to vaporize and decompose, producing hydrogen and nitrogen, as well as some incompletely decomposed ammonia liquid. The mixed fluid after the initial reaction flows into the second-stage vaporizer 5 through the connecting pipe 7. Inside the second-stage vaporizer 5, the threaded plate 18 on the outer periphery of the fixed rod 19 and the guide holes 17 on its surface play a key role. The threaded plate 18 increases the gas-liquid contact area, and the guide holes 17 make the fluid flow more uniform and prolong the contact time, further promoting the vaporization and decomposition of ammonia and improving the purity of the gas. The gas processed by the second-stage vaporizer 5 and the possible remaining small amount of incompletely reacted ammonia liquid enter the third-stage vaporizer 4 again through the connecting pipe 7. The inner cylinder 16 inside the three-stage vaporizer 4 is fitted with a heating wire 15 on its outer wall. The heating wire 15 provides additional heat for the final treatment of any remaining incompletely vaporized and decomposed ammonia. The gap design between the inner cylinder 16 and the inner wall of the three-stage vaporizer 4 helps to precisely control the heating zone and temperature, ensuring more thorough decomposition and vaporization of ammonia. The treated gas is discharged from the diffuser 2 at the bottom of the three-stage vaporizer 4. The diffuser 2 is conical with a smaller diameter at the top and a larger diameter at the bottom, with the aperture gradually increasing from the inside to the outside, improving the uniformity of gas diffusion. Throughout the process, the pressure gauges 6 at the top of the first-stage vaporizer 9 and the three-stage vaporizer 4 monitor the internal pressure in real time. The operation box 10 on one side of the top of the support plate 1 integrates various monitoring and control functions. The data table 11 on the operation box 10 records various data during the reaction process, and the display screen 13 intuitively displays the data change trends for easy observation by the operator. The operator can operate the device via the button 14, such as adjusting the power of the heating wire 15 and controlling the liquid inlet flow. If any abnormality occurs in the system, the alarm light 12 on the top of the control box 10 will light up to remind the operator to handle the situation in a timely manner and ensure the safe and stable operation of the device.
[0029] 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 multi-stage vaporization device for ammonia decomposition, comprising a support plate (1), characterized in that: A staged vaporization assembly is provided on the top of the support plate (1); The staged vaporization assembly includes a primary vaporizer (9), which is fixedly connected to the top of the support plate (1). A secondary vaporizer (5) is fixedly connected to the middle of the top side of the support plate (1). A support frame (3) is fixedly connected to one side of the top of the support plate (1). A tertiary vaporizer (4) is fixedly connected to the top of the support frame (3). An inlet pipe (8) is fixedly connected to the top of the primary vaporizer (9). The inlet pipe (8) is connected to an external equipment flange. A connecting pipe (7) is flanged between the primary vaporizer (9) and the secondary vaporizer (5), and between the secondary vaporizer (5) and the tertiary vaporizer (4).
2. The ammonia decomposition multi-stage vaporization device according to claim 1, characterized in that: The liquid inlet pipe (8) is connected to an external heat source device, and a catalyst bed (20) is bonded to the inner wall of the first-stage vaporizer (9).
3. The ammonia decomposition multi-stage vaporization device according to claim 1, characterized in that: A fixing rod (19) is fixedly connected to the middle of the inner side of the secondary vaporizer (5), and a threaded plate (18) is fixedly connected to the outer periphery of the fixing rod (19). The surface of the threaded plate (18) is provided with a plurality of evenly distributed guide holes (17).
4. The ammonia decomposition multi-stage vaporization device according to claim 1, characterized in that: The three-stage vaporizer (4) has an inner cylinder (16) fixedly connected inside. There is a gap between the inner cylinder (16) and the inner wall of the three-stage vaporizer (4). The outer wall of the inner cylinder (16) is fitted with a heating wire (15).
5. The ammonia decomposition multi-stage vaporization device according to claim 4, characterized in that: The bottom of the three-stage vaporizer (4) is fixedly connected to a diffuser (2), which is cone-shaped with a smaller top and a larger bottom. Pressure gauges (6) are installed on the top of both the three-stage vaporizer (4) and the first-stage vaporizer (9).
6. The ammonia decomposition multi-stage vaporization device according to claim 1, characterized in that: An operation box (10) is fixedly connected to one side of the top of the support plate (1), an alarm light (12) is fixedly connected to the top of the operation box (10), and multiple evenly distributed data tables (11) are fixedly connected to one side wall of the operation box (10).
7. The ammonia decomposition multi-stage vaporization device according to claim 6, characterized in that: The operation box (10) has a display screen (13) on the side wall near the data table (11), and a plurality of evenly distributed buttons (14) are fixedly connected to the side wall of the operation box (10) near the display screen (13).