Positive pressure type ammonia decomposition device

Abstract

The utility model relates to the technical field of chemical ammonia decomposition, and discloses a positive pressure type ammonia decomposition device which comprises a shell, a lining is fixedly connected to the inner wall of the shell, a spacing cavity is formed between the lining and an exhaust pipe, and a gas conveying pipe extending into the spacing cavity is fixedly connected to the wall surface of the shell. The wall face of the inner container is provided with a separation structure for separating the separation cavity, the separation structure comprises separation bodies, the wall face of the inner container is fixedly connected with the multiple separation bodies, the separation bodies can better support the outer portion of the exhaust pipe, deformation of the exhaust pipe caused by temperature difference is restrained, the overall strength of the exhaust pipe is improved, and the anti-explosion performance is further improved. Meanwhile, the separation bodies can separate the separation cavity, and when the external nitrogen supply device stops gas supply or nitrogen in the separation cavity is exhausted, the separation bodies divide the separation cavity into a plurality of independent cavities, gas with pressure in the separation cavity can be prevented from being exhausted rapidly, and the air hammer effect is prevented from being generated.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical ammonia decomposition, in particular to a positive pressure ammonia decomposition device. Background Art

[0002] The prior art discloses a positive pressure ammonia decomposition device (CN202223514609.X), which includes a furnace body and an ammonia decomposition furnace core, wherein a containing cavity is provided inside the furnace body, and a nitrogen channel for filling the containing cavity with nitrogen is opened at the lower part, and the nitrogen channel is connected to a nitrogen supply device, a pressure control device and a pressure relief device arranged outside the furnace body, and the pressure control device controls the nitrogen supply device and the pressure relief device to keep a slight positive pressure in the containing cavity at all times; the ammonia decomposition furnace core includes an ammonia inlet pipeline fixedly and sealedly inserted at the top of the furnace body, an ammonia decomposition cylinder located in the furnace body and connected to the ammonia inlet pipeline, and a hydrogen outlet pipeline fixedly and sealedly inserted at the top of the furnace body and connected to the ammonia decomposition cylinder, and the parts of the ammonia inlet pipeline and the hydrogen outlet pipeline located outside the furnace body are sleeved with expansion joints.

[0003] The prior art forms a positive pressure environment by forming a cavity between the outer shell and the inner liner and filling the cavity with nitrogen. The cavity between the inner liner and the outer shell is straight, which causes the gas in the cavity to be quickly discharged when the equipment providing nitrogen stops running, thereby generating a water hammer (air hammer effect), causing the inner liner to be subjected to a large instantaneous impact force. The cavity lacks support for the inner liner, and the instantaneous impact is likely to cause the inner liner to deform excessively and be damaged, thereby affecting the explosion-proof performance. There is a certain amount of room for optimization.

[0004] To this end, we propose a positive pressure ammonia decomposition device. Utility Model Content

[0005] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a positive pressure ammonia decomposition device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a positive pressure ammonia decomposition device, comprising an outer shell, the outer shell having a cavity, an exhaust pipe fixedly installed in the cavity of the outer shell, an inner tank for ammonia gas to enter and an air inlet pipe for gas discharge installed on the top surface of the outer shell, an inner liner fixedly connected to the inner wall of the outer shell, a partition cavity is formed between the inner liner and the exhaust pipe, an air supply pipe extending into the partition cavity is fixedly connected to the wall surface of the outer shell, a partition structure for separating the partition cavity is provided on the wall surface of the inner tank, the partition structure comprises a partition body, and a plurality of partition bodies are fixedly connected to the wall surface of the inner tank, the partition body can support the inner tank and divide the partition cavity into a plurality of interconnected chambers.

[0007] As a preferred embodiment of the utility model, the shell and the exhaust pipe are both cylindrical structures with closed bottoms, the exhaust pipe is fixedly mounted on the inner bottom surface of the shell, the inner lining is annular, and the inner lining is fixedly connected to the inner wall surface of the shell.

[0008] As a preferred embodiment of the utility model, a partition cavity is formed between the liner and the outer wall of the inner tank, the partition cavity forms an annular channel, and the wall surfaces of the outer shell and the liner are provided with mounting holes adapted for the air pipe, and the air pipe extends into the partition cavity through the mounting hole.

[0009] As a preferred embodiment of the utility model, the separator forms an annular plate adapted to the partition cavity, the outer circumferential surface of the separator is fixedly connected to the inner wall of the liner, the inner circumferential surface of the separator is fixedly connected to the outer wall of the liner, and multiple separators are equidistantly distributed in the partition cavity.

[0010] As a preferred embodiment of the present invention, a gap is left between the topmost separator and the upper end surface of the liner, and the air delivery pipe extends and is located above the topmost separator.

[0011] As a preferred embodiment of the present invention, the partition structure further includes a notch and a buffer cavity, a buffer cavity is formed between two adjacent partitions, the wall surface of each partition is provided with the same notch, and two adjacent buffer cavities are interconnected through the notch.

[0012] As a preferred embodiment of the present invention, the notch is formed on the end face of the separator, the notch penetrates the separator, and the notches on the walls of two adjacent separators are staggered.

[0013] Beneficial Effects

[0014] The utility model provides a positive pressure ammonia decomposition device. It has the following beneficial effects:

[0015] 1. This positive-pressure ammonia decomposition device inflates the partition cavity through the gas supply pipe to form a positive-pressure environment in the partition cavity, thereby forming a barrier outside the exhaust pipe to inhibit flammable and explosive gases from entering the exhaust pipe and improve the explosion-proof effect. A number of partitions are arranged, and the partitions can better form support on the outside of the exhaust pipe, inhibit deformation of the exhaust pipe caused by temperature difference, improve the overall strength of the exhaust pipe and further improve the explosion-proof performance. At the same time, the partitions can separate the partition cavity. When the external nitrogen supply device stops supplying gas or the nitrogen in the partition cavity is discharged, the multiple partitions divide the partition cavity into several independent chambers, which can inhibit the rapid discharge of pressurized gas in the partition cavity and inhibit the occurrence of air hammer effect.

[0016] 2. This positive pressure ammonia decomposition device, by opening a notch on the wall of each partition, with the angle between two adjacent notches being 180 degrees as an example, during the inflation stage, the gas flows downward from the top buffer chamber, and the gas enters another adjacent buffer chamber below from the notch, and so on, until the gas fills the entire partition chamber. On the basis of ensuring the inflation effect of the entire partition chamber, the notches that are staggered from each other can form a tortuous flow trajectory for the gas in the partition chamber during the exhaust stage, thereby inhibiting the gas from being directly discharged from the partition chamber, thereby achieving the purpose of inhibiting the water hammer effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the overall three-dimensional diagrams of the utility model;

[0018] Figure 2 This is the second overall stereogram of the utility model;

[0019] Figure 3 This is a schematic diagram of the installation of the lining of the utility model;

[0020] Figure 4 This is a schematic diagram of the installation of the separator of the utility model;

[0021] Figure 5 This is a schematic diagram of the installation of the separator and the inner tank of the utility model.

[0022] Legend: 10, outer shell; 11, liner; 12, air inlet pipe; 13, exhaust pipe; 20, lining; 21, partition cavity; 22, air delivery pipe; 30, separator; 31, notch; 32, buffer cavity. DETAILED DESCRIPTION

[0023] A positive pressure ammonia decomposition device, such as Figure 1 and Figure 2 As shown, it includes a shell 10, the shell 10 has a cavity, an exhaust pipe 13 is fixedly installed in the cavity of the shell 10, an inner tank 11 for ammonia gas to enter and an intake pipe 12 for gas discharge are installed on the top surface of the shell 10, a decomposition cylinder is installed inside the exhaust pipe 13, a wall surface of the decomposition cylinder is installed with a plurality of branch pipes, the branch pipes and the inner tank 11 are connected to the decomposition cylinder, and a catalyst is filled in the branch pipes to realize the decomposition reaction of ammonia gas. This is an existing well-known technology and will not be described here.

[0024] like Figure 1 , Figure 3 and Figure 4 as well as Figure 5As shown, the inner wall of the shell 10 is fixedly connected with an inner liner 20, and a partition cavity 21 is formed between the inner liner 20 and the exhaust pipe 13. The wall surface of the shell 10 is fixedly connected with an air delivery pipe 22 extending into the partition cavity 21. The wall surface of the liner 11 is provided with a partition structure for partitioning the partition cavity 21. The partition structure includes a partition body 30. The wall surface of the liner 11 is fixedly connected with a plurality of partition bodies 30. The partition bodies 30 can support the liner 11 and divide the partition cavity 21 into a plurality of interconnected chambers. The shell 10 and the exhaust pipe 13 are both cylindrical structures with closed bottoms. The exhaust pipe 13 is fixedly installed on the inner bottom surface of the shell 10. The inner liner 20 is fixedly connected with an air delivery pipe 22 extending into the partition cavity 21. The wall surface of the liner 11 is provided with a partition structure for partitioning the partition cavity 21. The partition structure includes a partition body 30. The wall surface of the liner 11 is fixedly connected with a plurality of partition bodies 30. The partition bodies 30 can support the liner 11 and divide the partition cavity 21 into a plurality of interconnected chambers. The shell 10 and the exhaust pipe 13 are both cylindrical structures with closed bottoms. The exhaust pipe 13 is fixedly installed on the inner bottom surface of the shell 10. 0 is annular, the liner 20 is fixedly connected to the inner wall of the shell 10, a partition cavity 21 is formed between the liner 20 and the outer wall of the liner 11, and the partition cavity 21 forms an annular channel. The wall surfaces of the shell 10 and the liner 20 are provided with mounting holes adapted to the gas delivery pipe 22, and the gas delivery pipe 22 extends into the partition cavity 21 through the mounting holes. The separator 30 forms an annular plate adapted to the partition cavity 21, and the outer circumferential surface of the separator 30 is fixedly connected to the inner wall of the liner 20, and the inner circumferential surface of the separator 30 is fixedly connected to the outer wall of the liner 11. A plurality of separators 30 are equidistantly distributed in the partition cavity 21, and the uppermost separator 30 is connected to the liner 20. There is a gap between the end faces, and the air delivery pipe 22 extends above the top partition 30. In this solution, the liner 20 is installed on the inner wall of the outer shell 10, and the spacer cavity 21 is formed between the liner 20 and the inner tank 11. The air delivery pipe 22 is connected with the nitrogen supply device, the pressure control device and the pressure relief device (the nitrogen supply device, the pressure control device and the pressure relief device can use existing devices in the field, which are not described in detail in this embodiment and are not shown in the drawings). The air delivery pipe 22 is used to inflate the spacer cavity 21 so that the spacer cavity 21 forms a positive pressure environment, thereby forming a layer of shielding outside the exhaust pipe 13. A barrier is formed to suppress flammable and explosive gases from entering the exhaust pipe 13 and improve the explosion-proof effect. A plurality of partitions 30 are arranged. The partitions 30 can better form a support outside the exhaust pipe 13, suppress the deformation of the exhaust pipe 13 caused by temperature difference, improve the overall strength of the exhaust pipe 13 and further improve the explosion-proof performance. At the same time, the partitions 30 can separate the partition cavity 21. When the external nitrogen supply device stops supplying gas or the nitrogen in the partition cavity 21 is discharged, the partition cavity 21 is separated by the plurality of partitions 30 to form a plurality of independent chambers, which can suppress the rapid discharge of the pressurized gas in the partition cavity 21 and suppress the occurrence of the air hammer effect.

[0025] like Figure 5As shown, the partition structure also includes a notch 31 and a buffer cavity 32. A buffer cavity 32 is formed between two adjacent partitions 30. The wall of each partition 30 is provided with the same notch 31. Two adjacent buffer cavities 32 are interconnected through the notch 31. The notch 31 is provided at the end face of the partition 30. The notch 31 runs through the partition 30. The notches 31 on the walls of two adjacent partitions 30 are staggered. As a supplement to the above scheme, by providing a notch 31 on the wall of each partition 30, the angle between two adjacent notches 31 is taken as 180 degrees. During the inflation stage, the gas flows downward from the top buffer cavity 32, and the gas enters another adjacent buffer cavity 32 below from the notch 31, and so on, until the gas fills the entire partition cavity 21. On the basis of ensuring the inflation effect of the entire partition cavity 21, the staggered notches 31 can enable the gas to form a tortuous flow trajectory in the partition cavity 21 during the exhaust stage, thereby suppressing the gas from directly discharging from the partition cavity 21, thereby achieving the purpose of suppressing the air hammer effect.

[0026] The working principle of the utility model is as follows: the air is inflated into the partition cavity 21 through the air delivery pipe 22 so that the partition cavity 21 forms a positive pressure environment, thereby forming a barrier outside the exhaust pipe 13, inhibiting flammable and explosive gases from entering the exhaust pipe 13, and improving the explosion-proof effect. A plurality of partitions 30 are provided, and the partitions 30 can better form a support outside the exhaust pipe 13, inhibit the deformation of the exhaust pipe 13 caused by the temperature difference, improve the overall strength of the exhaust pipe 13 and further improve the explosion-proof performance. A notch 31 is provided on the wall of each partition 30, and the angle between two adjacent notches 31 is taken as 180 degrees. During the inflation stage, the gas flows downward from the uppermost buffer cavity 32, and the gas enters another adjacent buffer cavity 32 below from the notch 31, and so on, until the gas fills the entire partition cavity 21. On the basis of ensuring the inflation effect of the entire partition cavity 21, the mutually displaced notches 31 can form a tortuous flow trajectory in the partition cavity 21 during the exhaust stage, inhibiting the gas from being directly discharged from the partition cavity 21, thereby achieving the suppression of the water hammer effect.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A positive pressure ammonia decomposition device, comprising a housing (10), the housing (10) having a cavity, an exhaust pipe (13) fixedly installed in the cavity of the housing (10), an inner liner (11) for ammonia gas to enter and an air inlet pipe (12) for gas to be discharged are installed on the top surface of the housing (10), characterized in that: The inner wall of the outer shell (10) is fixedly connected to an inner liner (20), a partition cavity (21) is formed between the inner liner (20) and the exhaust pipe (13), the wall of the outer shell (10) is fixedly connected to an air delivery pipe (22) extending into the partition cavity (21), the wall of the inner liner (11) is provided with a partition structure for partitioning the partition cavity (21), the partition structure comprising a partition body (30), the wall of the inner liner (11) is fixedly connected to a plurality of partition bodies (30), the partition bodies (30) are capable of supporting the inner liner (11) and partitioning the partition cavity (21) into a plurality of chambers that are interconnected.

2. The positive pressure ammonia decomposition device according to claim 1, characterized in that: The outer shell (10) and the exhaust pipe (13) are both cylindrical structures with closed bottoms; the exhaust pipe (13) is fixedly mounted on the inner bottom surface of the outer shell (10); the inner lining (20) is annular and fixedly connected to the inner wall surface of the outer shell (10).

3. The positive pressure ammonia decomposition device according to claim 1, characterized in that: A partition cavity (21) is formed between the inner liner (20) and the outer wall of the inner tank (11), and the partition cavity (21) forms an annular channel. The wall surfaces of the outer shell (10) and the inner liner (20) are both provided with mounting holes adapted for the gas delivery pipe (22), and the gas delivery pipe (22) extends through the mounting holes into the partition cavity (21).

4. The positive pressure ammonia decomposition device according to claim 1, characterized in that: The separator (30) forms an annular plate adapted to the partition cavity (21); the outer circumferential surface of the separator (30) is fixedly connected to the inner wall of the liner (20); the inner circumferential surface of the separator (30) is fixedly connected to the outer wall of the liner (11); and a plurality of separators (30) are equidistantly distributed in the partition cavity (21).

5. The positive pressure ammonia decomposition device according to claim 1, characterized in that: A gap is left between the topmost separator (30) and the upper end surface of the liner (20), and the gas delivery pipe (22) extends and is located above the topmost separator (30).

6. The positive pressure ammonia decomposition device according to claim 1, characterized in that: The partition structure further comprises a notch (31) and a buffer cavity (32); a buffer cavity (32) is formed between two adjacent partitions (30); the wall surface of each partition (30) is provided with the same notch (31); and the two adjacent buffer cavities (32) are interconnected via the notch (31).

7. The positive pressure ammonia decomposition device according to claim 6, characterized in that: The notch (31) is opened on the end surface of the separator (30), the notch (31) penetrates the separator (30), and the notches (31) on the walls of two adjacent separators (30) are staggered.

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