Reaction furnace for producing hydrogen through ammonia decomposition

Abstract

The utility model relates to a reaction furnace for producing hydrogen through ammonia decomposition. The lower part of the furnace shell is provided with a heat inlet, and the upper part of the furnace shell is provided with a heat outlet, an ammonia gas inlet and a produced gas outlet; a furnace pipe is arranged in the furnace shell and comprises an upper gas distribution bag communicated with the ammonia gas inlet, a preheating pipe is arranged at the lower end of the upper gas distribution bag, a lower gas distribution bag is arranged at the lower end of the preheating pipe, the lower gas distribution bag is arranged on the lower portion of the furnace pipe, a decomposition pipe is arranged at the upper end of the lower gas distribution bag, a gas collection bag is arranged at the upper end of the decomposition pipe, and the gas collection bag is communicated with the output gas exhaust port. According to the reaction furnace for hydrogen production through ammonia decomposition, a heat exchanger is omitted, and preheating is carried out through the structure of the reaction furnace; and the gas output is increased on the basis of ensuring the reaction effect.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen energy production, in particular to a reaction furnace for producing hydrogen by decomposing ammonia. Background Art

[0002] Ammonia decomposition to produce hydrogen is a common chemical reaction for industrial hydrogen production. During the reaction, ammonia is heated and decomposed into hydrogen and nitrogen. The reaction is carried out at high temperatures and usually uses metals such as iron or nickel as catalysts. The main gases in the reaction products can be easily separated by adsorption and have a wide range of uses, such as ammonia production, synthesis of amino compounds, hydrogen energy, etc.

[0003] At present, the raw material for hydrogen production by ammonia decomposition is liquid ammonia, which is vaporized into ammonia gas, preheated by a heat exchanger, and then heated in a reactor. During the heating process, ammonia gas is decomposed into hydrogen and nitrogen. The output gas is cooled in a heat exchanger and purified. The reactor for hydrogen production by ammonia decomposition is filled with a catalyst reaction chamber to decompose ammonia gas, increase the volume, and improve the reaction rate.

[0004] However, conventional ammonia decomposition hydrogen production reactors still have the following shortcomings:

[0005] 1. The vaporized low-temperature ammonia is preheated by a heat exchanger, but the preheating temperature of the ammonia cannot be guaranteed;

[0006] 2. The fluidity in the reaction chamber is poor, resulting in low gas output from the reaction. Utility Model Content

[0007] In order to solve the technical problems existing in the background technology, the utility model provides a reactor for producing hydrogen by decomposing ammonia, which eliminates the heat exchanger and performs preheating through the structure of the reactor itself; the output gas volume is increased on the basis of ensuring the reaction effect.

[0008] The technical solution adopted by the utility model is:

[0009] A reactor for producing hydrogen by decomposing ammonia comprises a furnace shell, wherein the lower part of the furnace shell is connected with a heat inlet, and the upper part of the furnace shell is connected with a heat outlet, an ammonia inlet, and a produced gas outlet.

[0010] A furnace shell is provided with a furnace core, and the furnace core includes: an upper gas bag connected with an ammonia inlet and arranged at the upper part of the furnace core, the lower end of the upper gas bag is connected with a preheating pipe, the lower end of the preheating pipe is connected with a lower gas bag, the lower gas bag is arranged at the lower part of the furnace core, the upper end of the lower gas bag is connected with a decomposition pipe, the upper end of the decomposition pipe is connected with a gas collecting bag, and the gas collecting bag is connected with the output gas outlet.

[0011] Furthermore, the furnace shell is provided with a vacuum sleeve;

[0012] The heat inlet is arranged at the center of the lower part of the furnace shell;

[0013] The output gas outlet is arranged at the center of the upper part of the furnace shell;

[0014] The heat exhaust port and the ammonia inlet are arranged on both sides of the output gas exhaust port.

[0015] Furthermore, the upper air bag is configured to be in a ring shape;

[0016] The gas collecting bag is set in a disc shape and is arranged in the ring of the upper gas bag;

[0017] The lower air bag is configured in a disc shape and is arranged directly below the upper air bag and the air collecting bag.

[0018] Furthermore, a plurality of preheating tubes are distributed in a circular array along the center of the upper air bag.

[0019] Furthermore, the lower gas bag is penetrated by a main flow channel and a branch flow channel, a preheating pipe weld is arranged at the edge of the upper end of the lower gas bag, and a decomposition pipe lower weld is arranged at the upper end of the lower gas bag.

[0020] Furthermore, the main flow channel is arranged in the center of the lower air bag disc;

[0021] The flow dividers are arranged in a plurality of circular arrays distributed along the center of the lower air divider.

[0022] Furthermore, the preheating tube welding openings are provided in a plurality of circular arrays distributed along the center of the lower gas bag for welding the preheating tubes;

[0023] The lower welding openings of the decomposition tube are arranged in a plurality of circular arrays along the center of the lower gas bag, and are arranged in a plurality of circles co-centered for welding the decomposition tube.

[0024] Furthermore, the branch channel and the lower weld of the decomposition tube are arranged alternately.

[0025] Furthermore, a decomposition tube upper weld is provided at the upper end of the gas collecting bag.

[0026] Furthermore, a plurality of weld openings on the decomposition tube are distributed in a circular array along the center of the gas collecting bag.

[0027] The utility model has the advantages of a reactor for hydrogen production by decomposing ammonia:

[0028] 1. Preheat the vaporized ammonia through the preheating tube in the furnace shell;

[0029] 2. The decomposition tubes are arranged in a multi-circle concentric circular array to increase the accommodation space for the output gas, thereby improving the fluidity of the output gas and ensuring the output gas volume under a pressurized environment that ensures the reaction rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation of the utility model, the drawings required in the specific implementation are briefly introduced below. The drawings in the following description are implementations of the utility model.

[0031] Figure 1 This is a general three-dimensional schematic diagram of a reactor for producing hydrogen by decomposing ammonia provided by an example of the utility model;

[0032] Figure 2 The utility model provides a three-dimensional schematic diagram of a furnace for ammonia decomposition hydrogen production reactor Figure 1 ;

[0033] Figure 3 This utility model example Figure 2 An enlarged three-dimensional schematic diagram of part A in the middle;

[0034] Figure 4 The utility model provides a three-dimensional schematic diagram of a furnace for ammonia decomposition hydrogen production reactor Figure 2 ;

[0035] Figure 5 This is a three-dimensional schematic diagram of the lower gas bag of a reactor for producing hydrogen by decomposing ammonia provided by the utility model;

[0036] Figure 6 The utility model provides a three-dimensional schematic diagram of a gas collecting bag of a reactor for producing hydrogen by decomposing ammonia.

[0037] In the figure:

[0038] 10. Furnace shell, 11. Heat inlet, 12. Heat outlet,

[0039] 21. Ammonia inlet, 22. Output gas outlet,

[0040] 3. Furnace core, 31. Upper gas bag, 32. Preheating tube, 33. Lower gas bag, 330. Main channel, 331. Branch channel, 332. Preheating tube weld, 333. Lower weld of decomposition tube, 34. Decomposition tube, 35. Gas collecting bag, 351. Upper weld of decomposition tube. DETAILED DESCRIPTION

[0041] In order to more clearly and specifically explain the specific implementation purpose and implementation method of the utility model, the technical solution of the utility model will be fully described below. The described embodiment is a part of the embodiment of the utility model, not all the embodiments. Without making creative work, all other embodiments based on the embodiment described in the utility model belong to the protection scope of the utility model.

[0042] The utility model discloses a reactor for producing hydrogen by decomposing ammonia. Figure 1As shown, it comprises: a furnace shell 10, and the furnace shell 10 is covered with a vacuum sleeve.

[0043] A heat inlet 11 is provided in the center of the lower part of the furnace shell 10 , and a heat exhaust port 12 , an ammonia inlet 21 , and a produced gas exhaust port 22 are provided in the upper part of the furnace shell 10 . The produced gas exhaust port 22 is provided in the center of the upper part of the furnace shell 10 , and the heat exhaust port 12 and the ammonia inlet 21 are provided on both sides of the produced gas exhaust port 22 and extend into the furnace shell 10 .

[0044] A furnace 3 is arranged in the furnace shell 10. Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the furnace 3 comprises:

[0045] An annular upper gas bag 31 is connected to the ammonia inlet 21 and is arranged on the upper part of the furnace 3. The lower end of the upper gas bag 31 is connected to a preheating pipe 32. Twenty-four preheating pipes 32 are arranged in a circular array along the center of the upper gas bag 31. The lower end of the preheating pipe 32 is connected to a disc-shaped lower gas bag 33. The lower gas bag 33 is arranged directly below the upper gas bag 31 and the gas collecting bag 35. The lower gas bag 33 is arranged at the lower part of the furnace 3. A main flow channel 330 and a branch flow channel 331 are arranged through the lower gas bag 33. The main flow channel 330 is arranged in the center of the lower gas bag 33 disk. A plurality of branch flow channels 331 are arranged along the center of the lower gas bag 33. A preheating pipe weld 332 is arranged at the edge of the upper end of the lower gas bag 33. The preheating pipe weld 332 is distributed along the center of the lower gas bag 33. Twenty-four are provided for welding the preheating tube 32, and a decomposition tube lower weld 333 is provided at the upper end of the lower gas bag 33, and thirty-six decomposition tube lower welds 333 are distributed along the center of the lower gas bag 33 in a circular array, and three circles are distributed cocentrically, six, twelve, and eighteen from the inner circle to the outer circle, respectively, for welding the decomposition tube 34, and the flow channels 331 and the decomposition tube lower welds 333 are staggered; thirty-six decomposition tubes 34 are connected to the upper end of the lower gas bag 33, and a disc-shaped gas collecting bag 35 is connected to the upper end of the gas collecting bag 35, and an upper decomposition tube weld 351 is provided on the upper end of the gas collecting bag 35, and thirty-six upper decomposition tube welds 351 are distributed along the center of the gas collecting bag 35 in a circular array, and the gas collecting bag 35 is arranged in the ring of the upper gas bag 31, and the gas collecting bag 35 is connected to the output gas outlet 22.

[0046] Based on the above, the embodiment of the reactor for hydrogen production by decomposing ammonia in the utility model is used as inspiration. Through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of ​​the utility model. The technical scope of the utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A reactor for producing hydrogen by decomposing ammonia, Features: include: A furnace shell (10), wherein the lower portion of the furnace shell (10) is connected to a heat inlet (11), and the upper portion of the furnace shell (10) is connected to a heat outlet (12), an ammonia inlet (21), and a produced gas outlet (22); A furnace core (3) is arranged in the furnace shell (10), and the furnace core (3) comprises: An upper gas bag (31) is connected to the ammonia inlet (21) and is arranged at the upper part of the furnace (3); the lower end of the upper gas bag (31) is connected to a preheating pipe (32); the lower end of the preheating pipe (32) is connected to a lower gas bag (33); the lower gas bag (33) is arranged at the lower part of the furnace (3); the upper end of the lower gas bag (33) is connected to a decomposition pipe (34); the upper end of the decomposition pipe (34) is connected to a gas collecting bag (35); the gas collecting bag (35) is connected to the output gas outlet (22).

2. A reactor for producing hydrogen by decomposing ammonia according to claim 1, Features: The furnace shell (10) is provided with a vacuum sleeve on its outer cover; The heat inlet (11) is arranged at the center of the lower part of the furnace shell (10); The output gas outlet (22) is arranged at the center of the upper part of the furnace shell (10); The heat exhaust port (12) and the ammonia inlet (21) are arranged on both sides of the output gas exhaust port (22) at the upper part of the furnace shell (10).

3. A reactor for producing hydrogen by decomposing ammonia according to claim 1, Features: The upper air bag (31) is arranged in a circular ring shape; The gas collecting bag (35) is configured in a disc shape and is arranged in the ring of the upper gas bag (31); The lower air bag (33) is configured in a disc shape and is disposed directly below the upper air bag (31) and the air collecting bag (35).

4. A reactor for producing hydrogen by decomposing ammonia according to claim 3, Features: A plurality of preheating tubes (32) are arranged in a circular array distributed along the center of the upper gas bag (31).

5. A reactor for producing hydrogen by decomposing ammonia according to claim 4, Features: The lower gas bag (33) is provided with a main flow channel (330) and a branch flow channel (331) running through it, a preheating pipe weld (332) is provided at the edge of the upper end of the lower gas bag (33), and a decomposition pipe lower weld (333) is provided at the upper end of the lower gas bag (33).

6. A reactor for producing hydrogen by decomposing ammonia according to claim 5, Features: The main flow channel (330) is arranged at the center of the lower gas distribution bag (33) disc; A plurality of the flow dividers (331) are arranged in a circular array distributed along the center of the lower air divider bag (33).

7. A reactor for producing hydrogen by decomposing ammonia according to claim 6, Features: The preheating tube welding openings (332) are provided in a plurality of circular arrays distributed along the center of the lower gas bag (33) for welding the preheating tube (32); The decomposition tube lower welding openings (333) are arranged in a plurality of circular arrays along the center of the lower gas bag (33), and are arranged in a plurality of circles co-centeredly for welding the decomposition tube (34).

8. A reactor for producing hydrogen by decomposing ammonia according to claim 7, Features: The branch channels (331) and the lower weld openings (333) of the decomposition tubes are arranged in a staggered manner.

9. A reactor for producing hydrogen by decomposing ammonia according to claim 7, Features: The upper end of the gas collecting bag (35) is provided with a decomposition tube upper welding opening (351).

10. A reactor for producing hydrogen by decomposing ammonia according to claim 9, Features: A plurality of weld openings (351) on the decomposition tube are arranged in a circular array distributed along the center of the gas collecting bag (35).

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