Waste heat recovery type ammonia decomposition reactor

Abstract

The utility model provides a waste heat recovery type ammonia decomposition reactor which comprises a main shell, an electric heating element is arranged in the main shell, a decomposition cavity is arranged in the main shell, the electric heating element is arranged on the outer side of the decomposition cavity, the top end in the decomposition cavity is rotatably connected with a stirring shaft in a penetrating mode, and the stirring shaft is arranged in the main shell. The stirring blades are connected to the outer ring of the stirring shaft, the stirring shaft is connected with the motor through the bevel gear set, and the motor is arranged at the upper end of the main shell. Under the action of the delivery pump, a medium circularly flows in the first delivery pipe, the reaction shell and the second delivery pipe, when liquid ammonia is heated and decomposed, the flowing medium can also be heated by heat of the medium, and after the medium is heated, the catalytic pipe can be preheated and heated through the heat medium, so that subsequent catalytic decomposition of ammonia gas is facilitated; the gas obtained after ammonia gas decomposition is output through the output pipe and can exchange heat with liquid water in the water tank, and waste heat of the gas obtained after catalytic decomposition is exchanged and recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonia decomposition reactors, in particular to a waste heat recovery type ammonia decomposition reactor. Background Art

[0002] At present, the country is vigorously promoting hydrogen energy vehicles. Due to the large amount of hydrogen escape during storage and transportation, it is difficult to transport it over long distances. Hydrogen is often stored and transported in the form of ammonia to avoid the problem of hydrogen transportation. At the same time, a heat exchange ammonia decomposition reactor is used to set up an on-site hydrogen production device to produce hydrogen.

[0003] At present, when existing ammonia is decomposed, liquid ammonia needs to be first introduced into a decomposition furnace for heating and decomposition into ammonia gas. After the liquid ammonia is decomposed, the decomposed gas is introduced into a catalytic reaction device. Under the action of a nickel-based catalyst, the ammonia gas is decomposed into a hydrogen-nitrogen mixed gas. However, it is inconvenient to recycle the waste heat of the decomposed gas.

[0004] In summary, there is a need for a waste heat recovery ammonia decomposition reactor. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a waste heat recovery ammonia decomposition reactor, which solves the problems mentioned in the background technology.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A waste heat recovery ammonia decomposition reactor comprises a main shell, an electric heating element is arranged inside the main shell, a decomposition chamber is arranged inside the main shell, the electric heating element is arranged on the outside of the decomposition chamber, a stirring shaft is rotatably connected to the top end of the decomposition chamber, a stirring blade is connected to the outer ring of the stirring shaft, the stirring shaft is connected to a motor through a bevel gear set, and the motor is arranged at the upper end of the main shell.

[0008] Furthermore, the main shell includes a reaction shell, and the reaction shell is arranged near the left side of the upper end of the main shell. A first delivery pipe is arranged through the inside of the main shell, and the first delivery pipe is arranged between the decomposition chamber and the electric heating element, and the first delivery pipe is connected to the reaction shell.

[0009] Furthermore, the main shell further includes an external pipe, the first delivery pipe is connected to the external pipe, the first delivery pipe is connected to a second delivery pipe via a delivery pump, and the second delivery pipe is connected to the reaction shell.

[0010] Furthermore, the main shell also includes an air supply pipe, the upper end of the main shell is connected to the air supply pipe, the end of the air supply pipe away from the main shell is connected to the reaction shell, and the air supply pipe is connected to the inside of the decomposition chamber.

[0011] Furthermore, the main shell further comprises a partition, the reaction shell is provided with a partition and a baffle, the baffle is arranged between the partitions, and the baffle is arranged in an up-and-down staggered manner inside the reaction shell.

[0012] Furthermore, the main shell also includes a catalytic tube, and the reaction shell is provided with a catalytic tube, the catalytic tube passes through the partition and the baffle, and the top of the main shell is provided with an output tube, the output tube passes through the partition and the baffle, the output tube is arranged on the inner side of the catalytic tube, and one end of the output tube passes through a water tank, and the water tank is arranged on the left side of the main shell.

[0013] The utility model provides a waste heat recovery ammonia decomposition reactor. Compared with the prior art, it has the following beneficial effects:

[0014] Firstly, liquid ammonia is added into the decomposition chamber, and the liquid ammonia in the decomposition chamber is heated and decomposed under the action of an electric heating element. At the same time, the stirring blade is driven to rotate under the action of a motor, a bevel gear set and a stirring shaft to stir the liquid ammonia, which helps the liquid ammonia to be more fully thermally decomposed. An appropriate amount of medium is added into the first delivery pipe, the second delivery pipe and the space in the reaction shell where the first delivery pipe and the second delivery pipe are connected through an external pipe. Under the action of a delivery pump, the medium circulates in the first delivery pipe, the reaction shell and the second delivery pipe. When the liquid ammonia is heated and decomposed, its heat can also heat the flowing medium. After the medium is heated, the catalytic tube can be preheated by the heat medium, which is convenient for the subsequent catalytic decomposition of ammonia. The gas after the decomposition of the ammonia is output through an output pipe, which can be heat-exchanged with the liquid water in the water tank, and the waste heat of the gas after the catalytic decomposition is heat-exchanged and recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The schematic diagram of the front cross-sectional structure of the main housing of the utility model is shown;

[0017] Figure 2 The schematic diagram of the left side cross-sectional structure of the main housing of the utility model is shown;

[0018] Figure 3 The left side structural diagram of the reaction shell of the utility model is shown;

[0019] Figure 4 A schematic diagram of the top view of the main housing of the utility model is shown;

[0020] Figure 5 Shows a schematic diagram of the output pipe and water tank structure of the utility model;

[0021] Figure 6 The schematic diagram of the front cross-sectional structure of the reaction shell of the utility model is shown;

[0022] As shown in the figure: 1. Main shell; 101. Reaction shell; 102. First delivery pipe; 103. External pipe; 104. Delivery pump; 105. Second delivery pipe; 106. Gas pipe; 107. Partition; 108. Catalytic tube; 109. Baffle; 110. Output pipe; 111. Water tank; 2. Electric heating element; 3. Decomposition chamber; 4. Stirring shaft; 5. Stirring blades; 6. Bevel gear set; 7. Motor. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0024] Embodiment 1

[0025] In order to solve the technical problems in the background technology, a waste heat recovery ammonia decomposition reactor is provided as follows:

[0026] Combination Figure 1-Figure 6 As shown, the utility model provides a waste heat recovery ammonia decomposition reactor, including a main shell 1, an electric heating element 2 is arranged inside the main shell 1, a decomposition chamber 3 is arranged inside the main shell 1, the electric heating element 2 is arranged on the outside of the decomposition chamber 3, a stirring shaft 4 is rotatably connected to the top end of the decomposition chamber 3, a stirring blade 5 is connected to the outer ring of the stirring shaft 4, the stirring shaft 4 is connected to the motor 7 through a bevel gear set 6, and the motor 7 is arranged at the upper end of the main shell 1.

[0027] The stirring blade 5 is driven to rotate by the motor 7, the bevel gear set 6 and the stirring shaft 4 to stir the liquid ammonia, which helps the liquid ammonia to be more fully decomposed by heat.

[0028] In this embodiment, the main shell 1 includes a reaction shell 101, and the reaction shell 101 is arranged at the upper end of the main shell 1 near the left side. A first delivery pipe 102 is arranged through the inside of the main shell 1, and the first delivery pipe 102 is arranged between the decomposition chamber 3 and the electric heating element 2. The first delivery pipe 102 is connected to the reaction shell 101.

[0029] Liquid ammonia is heated and decomposed by the electric heating element 2, and its heat can also heat the flowing medium. After the medium is heated, the catalytic tube 108 can be preheated by the heat medium. The catalytic tube 108 is provided with a catalyst, which is the prior art and is not part of the novelty of this patent.

[0030] Embodiment 2

[0031] like Figure 1-Figure 6 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0032] In this embodiment, the main shell 1 also includes an external tube 103, the first delivery pipe 102 is connected to the external tube 103, the first delivery pipe 102 is connected to the second delivery pipe 105 through the delivery pump 104, the second delivery pipe 105 is connected to the reaction shell 101, the main shell 1 also includes a gas pipe 106, the upper end of the main shell 1 is connected to the gas pipe 106, the end of the gas pipe 106 away from the main shell 1 is connected to the reaction shell 101, and the gas pipe 106 is connected to the inside of the decomposition chamber 3.

[0033] An appropriate amount of medium is added into the first delivery pipe 102, the second delivery pipe 105 and the space in the reaction shell 101 for connecting the first delivery pipe 102 and the second delivery pipe 105 through the external pipe 103, and the external pipe 103 is closed. Under the action of the delivery pump 104, the medium circulates in the first delivery pipe 102, the reaction shell 101 and the second delivery pipe 105.

[0034] Embodiment 3

[0035] like Figure 1-Figure 6 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0036] In this embodiment, the main shell 1 also includes a partition 107, and the reaction shell 101 is provided with a partition 107 and a baffle 109, and the baffle 109 is arranged between the partitions 107, and the baffles 109 are arranged in an up and down staggered manner inside the reaction shell 101. The main shell 1 also includes a catalytic tube 108, and the reaction shell 101 is provided with a catalytic tube 108, and the catalytic tube 108 passes through the partition 107 and the baffle 109. An output pipe 110 is arranged through the top end of the main shell 1, and the output pipe 110 passes through the partition 107 and the baffle 109. The output pipe 110 is arranged on the inner side of the catalytic tube 108, and one end of the output pipe 110 passes through the water tank 111, and the water tank 111 is arranged on the left side of the main shell 1.

[0037] The baffle 109 extends the flow of the heat medium in the reaction shell 101 so that the heat medium can heat the catalytic tube 108 more fully. The gas after catalytic decomposition is output through the output pipe 110, and the residual heat of the gas can be exchanged with the liquid water in the water tank 111.

[0038] The working principle and use process of this utility model:

[0039] In use:

[0040] The first step: by adding liquid ammonia into the decomposition chamber 3, the liquid ammonia in the decomposition chamber 3 is heated and decomposed under the action of the electric heating element 2, and at the same time, the stirring blade 5 is driven to rotate under the action of the motor 7, the bevel gear set 6 and the stirring shaft 4 to stir the liquid ammonia, which helps the liquid ammonia to be more fully decomposed by heat.

[0041] Step 2: Open the external pipe 103, which is connected to the external medium supply device. Add a proper amount of medium to the first delivery pipe 102, the second delivery pipe 105 and the space in the reaction shell 101 where the first delivery pipe 102 and the second delivery pipe 105 are connected. Under the action of the delivery pump 104, the medium circulates in the first delivery pipe 102, the reaction shell 101 and the second delivery pipe 105. When the liquid ammonia is heated and decomposed, its heat can also heat the flowing medium.

[0042] Step 3: After the medium is heated, the catalytic tube 108 can be preheated by the circulating heat medium, and the gas generated by the decomposition of liquid ammonia enters the reaction shell 101 through the gas pipe 106 and catalytically decomposes with the catalyst in the catalytic tube 108. The gas after catalytic decomposition is output through the output pipe 110, and the waste heat of the gas can be exchanged with the liquid water in the water tank 111.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A waste heat recovery ammonia decomposition reactor, characterized in that: The invention comprises a main shell (1), wherein an electric heating element (2) is arranged inside the main shell (1), wherein a decomposition chamber (3) is arranged inside the main shell (1), wherein the electric heating element (2) is arranged outside the decomposition chamber (3), wherein the main shell (1) comprises a reaction shell (101), wherein the reaction shell (101) is arranged at the upper end of the main shell (1) near the left side, wherein a first delivery pipe (102) is arranged running through the inside of the main shell (1), wherein the first delivery pipe (102) is arranged between the decomposition chamber (3) and the electric heating element (2), wherein the first delivery pipe (102) is connected to the reaction shell (101), and wherein the main shell (1) further comprises a catalytic tube (108), wherein the catalytic tube (108) is arranged inside the reaction shell (101). 08), the catalytic tube (108) passes through the partition (107) and the baffle (109), an output tube (110) is arranged at the top end of the main shell (1), the output tube (110) passes through the partition (107) and the baffle (109), the output tube (110) is arranged on the inner side of the catalytic tube (108), one end of the output tube (110) passes through a water tank (111), the water tank (111) is arranged on the left side of the main shell (1), the top end of the decomposition chamber (3) passes through a stirring shaft (4) that is rotatably connected, the outer ring of the stirring shaft (4) is connected to a stirring blade (5), the stirring shaft (4) is connected to a motor (7) through a bevel gear set (6), and the motor (7) is arranged at the upper end of the main shell (1).

2. The waste heat recovery ammonia decomposition reactor according to claim 1, characterized in that: The main shell (1) further comprises an external pipe (103), the first delivery pipe (102) is connected to the external pipe (103), the first delivery pipe (102) is connected to a second delivery pipe (105) via a delivery pump (104), and the second delivery pipe (105) is connected to the reaction shell (101).

3. The waste heat recovery ammonia decomposition reactor according to claim 1, characterized in that: The main shell (1) further comprises a gas pipe (106), the upper end of the main shell (1) being connected to the gas pipe (106), the end of the gas pipe (106) away from the main shell (1) being connected to the reaction shell (101), and the gas pipe (106) being communicated with the interior of the decomposition chamber (3).

4. The waste heat recovery ammonia decomposition reactor according to claim 1, characterized in that: The main shell (1) further comprises a partition (107), the reaction shell (101) is provided with a partition (107) and a baffle (109), the baffle (109) is arranged between the partitions (107), and the baffle (109) is arranged in an up-and-down staggered manner inside the reaction shell (101).

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