Micro-channel rapid ammonia evaporation and splitting decomposition integrated device

Abstract

The utility model discloses a micro-channel rapid ammonia evaporation and cracking integrated device which comprises an integrated box body, and an evaporation mechanism is mounted on one side of an inner cavity of the integrated box body; the inner side of the integrated box body is provided with a buffer mechanism, the other side of the inner cavity of the integrated box body is provided with a micro-channel cracking mechanism, the buffer mechanism is arranged between the evaporation mechanism and the micro-channel cracking mechanism, the integrated box body is filled with a thermal insulation material, and the micro-channel cracking mechanism comprises a second protective shell; and a cracking reaction assembly. According to the device, a certain amount of liquid ammonia fuel is quickly evaporated and cracked into hydrogen and nitrogen through evaporation of the evaporation mechanism and cracking of the micro-channel cracking mechanism by utilizing a matching arrangement mode of the evaporation mechanism and the micro-channel cracking mechanism, and the hydrogen and the nitrogen are supplied to the combustion device after being separated or non-separated, so that an effective combustion control means is achieved; high efficiency and stability of combustion can be guaranteed without evaporation and cracking of a large amount of ammonia, and use is more convenient.

Description

Technical Field

[0001] The utility model relates to the field of integrated devices, in particular to a microchannel rapid evaporation and cracking ammonia integrated device. Background Technique

[0002] Under the dual-carbon policy, the industrial field needs to use a variety of low-carbon / carbon-free fuels to gradually replace the original fossil fuels in the form of mixed combustion. If hydrogen and ammonia are selected as carbon-free alternative fuels, the boilers / furnaces need to be technically modified to enable multi-fuel coupled combustion. In this process, a certain amount of ammonia fuel needs to be pre-cracked into hydrogen fuel to form a mixed fuel to ensure efficient and stable combustion and reduce harmful products in the combustion exhaust gas.

[0003] In the traditional chemical industry, the evaporation and cracking of ammonia involve a huge processing volume, so traditional equipment is often large in size, and the evaporation and cracking devices are separately arranged. In the space of operating equipment systems such as boilers / furnaces, there is usually no large amount of idle space to place new equipment, resulting in inefficient and unstable combustion. Therefore, a rapid ammonia evaporation and cracking device with miniaturized, integrated, and modular design is needed to meet the low-carbon upgrading and transformation goals of the boiler / furnace systems in the traditional industry. Content of the Utility Model

[0004] The purpose of the utility model is to provide a microchannel rapid evaporation and cracking ammonia integrated device to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a microchannel rapid evaporation and cracking ammonia integrated device, including:

[0006] An integrated box body, on one side of the inner cavity of the integrated box body, an evaporation mechanism is installed;

[0007] A buffer mechanism is installed on the inner side of the integrated box body, and a microchannel cracking mechanism is installed on the other side of the inner cavity of the integrated box body. The buffer mechanism is arranged between the evaporation mechanism and the microchannel cracking mechanism. The inside of the integrated box body is filled with heat-insulating materials. The microchannel cracking mechanism includes:

[0008] A second protective shell, which is fixedly installed on the inner side of the integrated box body;

[0009] A cracking reaction component, which is installed on the inner side of the second protective shell.

[0010] Preferably, the evaporation mechanism includes:

[0011] A first protective shell, which is fixedly installed on the inner side of the integrated box body;

[0012] Stacked rotary finned tubes, and the stacked rotary finned tubes are installed inside the first protective shell;

[0013] Liquid ammonia feed pipe, the liquid ammonia feed pipe is fixedly inserted and connected to the top of the first protective shell, and one end of the liquid ammonia feed pipe is connected and communicated with one end of the stacked rotary finned tubes.

[0014] Preferably, the evaporation mechanism further includes:

[0015] First hot air outlet pipe, the first hot air outlet pipe is installed on the top of the first protective shell;

[0016] First hot air inlet pipe, the first hot air inlet pipe is installed on one side of the first protective shell, and both the first hot air outlet pipe and the first hot air inlet pipe are communicated with the inner cavity of the first protective shell.

[0017] Preferably, the buffer mechanism includes:

[0018] Buffer tank, the buffer tank is installed inside the integrated box body;

[0019] Ammonia discharge pipe, the ammonia discharge pipe is fixedly inserted and installed on the top of the buffer tank, one end of the ammonia discharge pipe is connected and communicated with the other end of the stacked rotary finned tubes, and the other end of the ammonia discharge pipe extends to the bottom of the inner cavity of the buffer tank.

[0020] Preferably, the cracking reaction assembly includes:

[0021] Cracking reaction microchannel substrate and hot air microchannel substrate, and a plurality of the cracking reaction microchannel substrates and the hot air microchannel substrates are arranged in an alternating parallel stacked combination;

[0022] Ammonia discharge pipe, the ammonia discharge pipe is fixedly inserted and connected to the top of the second protective shell, the bottom of the ammonia discharge pipe is connected with a plurality of first connecting pipes, and the first connecting pipes are connected with the cracking reaction microchannel substrate;

[0023] Second hot air outlet pipe, the second hot air outlet pipe is fixedly inserted and connected to the top of the second protective shell, the bottom of the second hot air outlet pipe is connected with a plurality of second connecting pipes, and the second connecting pipes are connected with the hot air microchannel substrate.

[0024] Preferably, the cracking reaction assembly further includes:

[0025] Ammonia inlet pipe, the ammonia inlet pipe is fixedly inserted and connected to the cracking reaction microchannel substrate and the hot air microchannel substrate, and a plurality of first connection holes are formed in the ammonia inlet pipe, the first connection holes are communicated with the inner cavity of the cracking reaction microchannel substrate, and one end of the ammonia inlet pipe is connected with the buffer tank.

[0026] Preferably, the cracking reaction assembly further includes:

[0027] A second hot air inlet pipe, which is fixedly inserted and connected to the cracking reaction microchannel substrate and the hot air microchannel substrate, and a plurality of second connection holes are provided on the second hot air inlet pipe, and the second connection holes communicate with the inner cavity of the hot air microchannel substrate.

[0028] The technical effects and advantages of the present utility model:

[0029] The present utility model uses the setting method of cooperating the evaporation mechanism and the microchannel cracking mechanism. The integrated device is applicable to the field of energy combustion. By integrally installing the evaporation mechanism and the microchannel cracking mechanism inside the integrated box body, the externally connected hot air is used as a heat source. Through the evaporation of the evaporation mechanism and the cracking of the microchannel cracking mechanism, a certain amount of liquid ammonia fuel is quickly evaporated and cracked into hydrogen and nitrogen, and then supplied to the combustion device after separation or non-separation. Effective combustion control means can ensure high efficiency and stability of combustion without a large amount of evaporation and cracking of ammonia, and the integrated setting of the evaporation mechanism and the microchannel cracking mechanism inside the integrated box body reduces the use volume and is more convenient to use. Description of the Drawings

[0030] Figure 1 It is a schematic diagram of the internal structure of the present utility model.

[0031] Figure 2 It is a schematic diagram of the internal structure at the evaporation mechanism of the present utility model.

[0032] Figure 3 It is a schematic diagram of the structure at the cracking reaction assembly of the present utility model.

[0033] In the figure: 1, integrated box body; 2, evaporation mechanism; 21, first protective shell; 22, laminated rotary finned tube; 23, liquid ammonia feed pipe; 24, first hot air outlet pipe; 25, first hot air inlet pipe; 3, buffer mechanism; 31, buffer tank; 32, ammonia discharge pipe; 4, microchannel cracking mechanism; 41, second protective shell; 42, cracking reaction assembly; 421, cracking reaction microchannel substrate; 422, hot air microchannel substrate; 423, ammonia discharge pipe; 424, second hot air outlet pipe; 425, ammonia inlet pipe; 426, second hot air inlet pipe; 5, thermal insulation material. Detailed Embodiments

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] The present invention provides a Figures 1-3 microchannel rapid evaporation and cracking ammonia integrated device as shown, including: an integrated box body 1, on one side of the inner cavity of the integrated box body 1, an evaporation mechanism 2 is installed; a buffer mechanism 3 is installed on the inner side of the integrated box body 1, and a microchannel cracking mechanism 4 is installed on the other side of the inner cavity of the integrated box body 1. The buffer mechanism 3 is arranged between the evaporation mechanism 2 and the microchannel cracking mechanism 4. The inside of the integrated box body 1 is filled with a heat insulation material 5 to facilitate heat insulation treatment and prevent heat dissipation. The integrated device is applicable to the field of energy combustion. By integrally installing the evaporation mechanism 2 and the microchannel cracking mechanism 4 on the inner side of the integrated box body 1, the externally connected hot air is used as a heat source. Through the evaporation of the evaporation mechanism 2 and the cracking of the microchannel cracking mechanism 4, a certain amount of liquid ammonia fuel is rapidly evaporated and cracked into hydrogen and nitrogen, and then supplied to the combustion device after separation or non-separation. Effective combustion control means can ensure high efficiency and stability of combustion without a large amount of evaporation and cracking of ammonia. Moreover, the integrated setting of the evaporation mechanism 2 and the microchannel cracking mechanism 4 inside the integrated box body 1 reduces the use volume and is more convenient to use. Through the settings of the first hot air inlet pipe 25 and the second hot air inlet pipe 426, it is convenient to introduce hot air above 700 °C from the outside as a heat source to supply the evaporation mechanism 2 and the microchannel cracking mechanism 4 respectively; liquid ammonia enters the evaporation mechanism 2 from the liquid ammonia feed pipe 23 at the top and evaporates into gaseous ammonia; ammonia gas enters the buffer tank 31 from the ammonia gas discharge pipe 32 at the top, and after the pressure is stabilized, it is supplied to the cracking reaction microchannel substrate 421 from the ammonia gas inlet pipe 425 at the top. The cracking reaction microchannel substrate 421 thermally cracks ammonia gas into nitrogen and hydrogen, and the cracked gas is sent out from the ammonia gas discharge pipe 423 at the top.

[0036] Among them, the evaporation mechanism 2 includes: a first protective shell 21 fixedly installed inside the integrated box body 1; a stacked rotary finned tube 22 installed inside the first protective shell 21; a liquid ammonia feed pipe 23 fixedly inserted and connected to the top of the first protective shell 21, with one end of the liquid ammonia feed pipe 23 connected and communicating with one end of the stacked rotary finned tube 22. The installation and protection of the stacked rotary finned tube 22 are facilitated through the first protective shell 21. The contact area between liquid ammonia and hot air is increased through the stacked rotary finned tube 22, thereby facilitating the rapid evaporation of liquid ammonia. After the liquid ammonia enters the interior of the stacked rotary finned tube 22 through the liquid ammonia feed pipe 23 and is evaporated at high temperature, it becomes gaseous ammonia and is discharged through the ammonia discharge pipe 32. The evaporation mechanism 2 further includes: a first hot air outlet pipe 24 installed on the top of the first protective shell 21; a first hot air inlet pipe 25 installed on one side of the first protective shell 21, and both the first hot air outlet pipe 24 and the first hot air inlet pipe 25 communicate with the inner cavity of the first protective shell 21. Since hot air flows upward, through the first hot air inlet pipe 25 installed at the bottom and the first hot air outlet pipe 24 installed at the top, it is convenient for hot air to be filled into the interior of the first protective shell 21 from the bottom and flow out from the top, so as to facilitate the flow of hot air.

[0037] Specifically, the buffer mechanism 3 includes: a buffer tank 31 installed inside the integrated box body 1; an ammonia discharge pipe 32 fixedly inserted and installed on the top of the buffer tank 31, with one end of the ammonia discharge pipe 32 connected and communicating with the other end of the stacked rotary finned tube 22, and the other end of the ammonia discharge pipe 32 extending to the bottom of the inner cavity of the buffer tank 31. The gaseous ammonia is conveniently filled into the bottom of the buffer tank 31 through the ammonia discharge pipe 32, and the gaseous ammonia is buffered through the buffer tank 31, so that the gas pressure of the gaseous ammonia entering the ammonia inlet pipe 425 is stable.

[0038] Among them, the microchannel cracking mechanism 4 includes: a second protective shell 41, which is fixedly installed inside the integrated box body 1, and the second protective shell 41 facilitates the protection of the cracking reaction component 42; a cracking reaction component 42, which is installed inside the second protective shell 41, and the cracking reaction component 42 includes: a cracking reaction microchannel substrate 421 and a hot air microchannel substrate 422, and a plurality of cracking reaction microchannel substrates 421 and the hot air microchannel substrate 422 are arranged in an alternating parallel laminated combination; an ammonia discharge pipe 423, which is fixedly inserted and connected to the top of the second protective shell 41, and a plurality of first connecting pipes are connected to the bottom of the ammonia discharge pipe 423, and the first connecting pipes are connected to the cracking reaction microchannel substrate 421; a second hot air outlet pipe 424, which is fixedly inserted and connected to the top of the second protective shell 41, and a plurality of second connecting pipes are connected to the bottom of the second hot air outlet pipe 424, and the second connecting pipes are connected to the hot air microchannel substrate 422. The cracking reaction component 42 further includes: an ammonia inlet pipe 425, which is fixedly inserted and connected to the cracking reaction microchannel substrate 421 and the hot air microchannel substrate 422, and a plurality of first connection holes are formed in the ammonia inlet pipe 425, the first connection holes communicate with the inner cavity of the cracking reaction microchannel substrate 421, and one end of the ammonia inlet pipe 425 is connected to the buffer tank 31.The cracking reaction assembly 42 further includes: a second hot air inlet pipe 426, which is fixedly inserted and connected to the cracking reaction microchannel substrate 421 and the hot air microchannel substrate 422. A plurality of second connection holes are provided on the second hot air inlet pipe 426, and the second connection holes communicate with the inner cavity of the hot air microchannel substrate 422. On the cracking reaction microchannel substrate 421, the long-acting catalyst combination is arranged on the inner wall of the microchannel by the impregnation method. After the arrangement, nano-level roughening treatment is carried out on the surface of the catalyst to increase the surface area for catalytic cracking reaction, so that ammonia can be quickly thermally cracked into nitrogen and hydrogen. Through the alternating arrangement between the hot air microchannel substrate 422 and the cracking reaction microchannel substrate 421, it is convenient to uniformly supply heat to each cracking reaction microchannel substrate 421 quickly, which also makes the thermal cracking reaction of the cracking reaction microchannel substrate 421 faster and more uniform. After the hot air enters from the second hot air inlet pipe 426, it is sent into the interior of the hot air microchannel substrate 422 through the second connection holes, so that the hot air can heat the entire hot air microchannel substrate 422. After the hot air microchannel substrate 422 supplies heat to the cracking reaction microchannel substrate 421, it is then discharged simultaneously through the second hot air outlet pipe 424 on the second connection pipe to supply heat to multiple hot air microchannel substrates 422 simultaneously. Ammonia enters through the ammonia inlet pipe 425, is sent into the interior of the cracking reaction microchannel substrate 421 through the first connection holes and thermally cracked into nitrogen and hydrogen, and then is discharged simultaneously through the ammonia discharge pipe 423 on the first connection pipe to ensure the efficient and stable progress of the ammonia cracking reaction.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A microchannel rapid evaporation and cracking ammonia integrated device, comprising: An integrated box (1), wherein an evaporation mechanism (2) is installed on one side of the inner cavity of the integrated box (1); The invention is characterized in that: a buffer mechanism (3) is installed on the inner side of the integrated box (1); a microchannel cracking mechanism (4) is installed on the other side of the inner cavity of the integrated box (1); the buffer mechanism (3) is arranged between the evaporation mechanism (2) and the microchannel cracking mechanism (4); the interior of the integrated box (1) is filled with a heat-insulating material (5); and the microchannel cracking mechanism (4) comprises: A second protective shell (41), the second protective shell (41) being fixedly mounted on the inner side of the integrated box (1); A cleavage reaction component (42), wherein the cleavage reaction component (42) is installed on the inner side of the second protective shell (41).

2. The microchannel rapid evaporation and cracking ammonia integrated device according to claim 1, characterized in that: The evaporation mechanism (2) comprises: A first protective shell (21), the first protective shell (21) being fixedly mounted on the inner side of the integrated box (1); A stacked rotary fin tube (22), wherein the stacked rotary fin tube (22) is installed on the inner side of the first protective shell (21); A liquid ammonia feed pipe (23), wherein the liquid ammonia feed pipe (23) is fixedly connected to the top of the first protective shell (21) through insertion, and one end of the liquid ammonia feed pipe (23) is connected to and communicates with one end of the stacked rotary finned tube (22).

3. The microchannel rapid evaporation and cracking ammonia integrated device according to claim 2, characterized in that: The evaporation mechanism (2) further comprises: A first hot air outlet pipe (24), wherein the first hot air outlet pipe (24) is installed on the top of the first protective shell (21); A first hot air inlet pipe (25), wherein the first hot air inlet pipe (25) is installed on one side of the first protective shell (21), and the first hot air outlet pipe (24) and the first hot air inlet pipe (25) are both in communication with the inner cavity of the first protective shell (21).

4. The microchannel rapid evaporation and cracking ammonia integrated device according to claim 1, characterized in that: The buffer mechanism (3) comprises: A buffer tank (31), wherein the buffer tank (31) is installed on the inner side of the integrated box (1); An ammonia discharge pipe (32), the ammonia discharge pipe (32) being fixedly installed and inserted into the top of the buffer tank (31), one end of the ammonia discharge pipe (32) being connected to and in communication with the other end of the stacked rotary finned tube (22), and the other end of the ammonia discharge pipe (32) extending to the bottom of the inner cavity of the buffer tank (31).

5. The microchannel rapid evaporation and cracking ammonia integrated device according to claim 1, characterized in that: The cleavage reaction assembly (42) comprises: A cracking reaction microchannel substrate (421) and a hot air microchannel substrate (422), wherein a plurality of the cracking reaction microchannel substrates (421) and the hot air microchannel substrates (422) are arranged in an alternating parallel stacked combination; an ammonia discharge pipe (423), the ammonia discharge pipe (423) being fixedly connected to the top of the second protective shell (41) by insertion, the bottom of the ammonia discharge pipe (423) being connected to a plurality of first connecting pipes, the first connecting pipes being connected to the cracking reaction microchannel substrate (421); A second hot air outlet pipe (424), the second hot air outlet pipe (424) is fixedly connected to the top of the second protective shell (41), and the bottom of the second hot air outlet pipe (424) is connected to a plurality of second connecting pipes, and the second connecting pipes are connected to the hot air microchannel substrate (422).

6. The integrated device for microchannel rapid evaporation and cracking of ammonia according to claim 5, characterized in that: The cleavage reaction assembly (42) further comprises: An ammonia inlet pipe (425) is fixedly connected to the cracking reaction microchannel substrate (421) and the hot air microchannel substrate (422) by insertion, and a plurality of first connection holes are provided on the ammonia inlet pipe (425), the first connection holes are in communication with the inner cavity of the cracking reaction microchannel substrate (421), and one end of the ammonia inlet pipe (425) is connected to the buffer tank (31).

7. The integrated device for microchannel rapid evaporation and cracking of ammonia according to claim 5, characterized in that: The cleavage reaction assembly (42) further comprises: A second hot air inlet pipe (426), the second hot air inlet pipe (426) is fixedly connected to the cracking reaction microchannel substrate (421) and the hot air microchannel substrate (422), and a plurality of second connection holes are provided on the second hot air inlet pipe (426), and the second connection holes are in communication with the inner cavity of the hot air microchannel substrate (422).

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