Protective structure for ammonia synthesis tower

Abstract

The utility model discloses a protective structure for an ammonia synthesis tower, which relates to the technical field of chemical equipment and comprises a bottom seal head and a support ring welded on the end face of the bottom seal head, and a connecting end on the upper surface of the support ring is connected with a connecting end of a barrel in a surfacing manner; the device further comprises a support, a high-temperature-resistant anticorrosive coating layer and a stainless steel plate. An annular inserting groove is vertically formed in the supporting ring in the horizontal direction towards the outer side end, a plurality of supports are evenly inserted into the annular inserting groove, the bottoms of the supports are fixed into the annular inserting groove through bolts, and the outer side surface of the connecting position of the supporting ring and the barrel is filled with the high-temperature-resistant anti-corrosion coating layer in a surrounding mode. The stainless steel plate is welded to the upper surface of the outer side of the supporting ring in a surrounding mode and wraps the high-temperature-resistant anti-corrosion coating layer. The welding seam is prevented from being exposed through the high-temperature-resistant anti-corrosion coating layer, then the high-temperature-resistant anti-corrosion coating layer is covered and protected through the stainless steel plate, finally, the high-temperature-resistant anti-corrosion coating layer and the stainless steel plate are clamped between the cylinder body and the support through the support, further reinforcement is conducted, and the sealing effect is achieved.

Description

Technical Field:

[0001] The utility model relates to the technical field of chemical equipment, and specifically relates to a protection structure for an ammonia synthesis tower. Background Art:

[0002] An ammonia synthesis tower is a device used to catalyze the reaction between nitrogen and hydrogen under high pressure and high temperature for ammonia synthesis. The ammonia synthesis tower is the heart of an ammonia synthesis plant and is a reactor with a complex structure. Currently, industrial ammonia synthesis is carried out at a pressure of 15.2 - 30.4 MPa and a temperature of 400 - 520 °C. To prevent the corrosion of steel by hydrogen under high pressure and high temperature, the ammonia synthesis tower consists of a high-pressure-resistant head, an outer cylinder, and an inner part installed inside the cylinder that can withstand high temperatures.

[0003] For the traditional forged and welded cylinder connection process, its structural advantage is that there is no longitudinal weld, but there are deep circumferential welds, high costs, and a large cylinder thickness; the cylinder height is relatively high. For the traditional cylinder and cylinder seat, they are fixed by welding. The welds are long-term exposed on the outer surface, not corrosion-resistant, and the welded areas usually need to be regularly inspected, and there is welding repair work, increasing the workload; at the same time, the temperature at the bottom outlet of the tower is high, and after long-term use, leakage is likely to occur. Content of the Utility Model:

[0004] The purpose of the utility model is to provide a protection structure for an ammonia synthesis tower to solve the problems raised in the above background art.

[0005] The utility model is implemented by the following technical solutions:

[0006] A protection structure for an ammonia synthesis tower includes a bottom head and a support ring welded to the end face of the bottom head. The connection end on the upper surface of the support ring is connected to the connection end of the cylinder by surfacing welding; it also includes a support, a high-temperature and corrosion-resistant coating layer, and a stainless steel plate; a circumferential slot is vertically opened at the outer end of the support ring along the horizontal direction, and a plurality of supports are evenly inserted into the circumferential slot. The bottom of the support is fixed in the circumferential slot by bolts. The high-temperature and corrosion-resistant coating layer is filled around the outer surface of the connection between the support ring and the cylinder, and the stainless steel plate is welded around the upper surface of the support ring and covers the outside of the high-temperature and corrosion-resistant coating layer; the high-temperature and corrosion-resistant coating layer and the stainless steel plate are clamped between the cylinder and the support.

[0007] Preferably, the upper surface of the support ring at the circumferential slot slopes downward, the support is in a "bu" character structure, the lower surface of the middle part of the support fits with the upper surface of the circumferential slot, and the bottom of the support has a through hole.

[0008] Preferably, a plurality of threaded holes adapted to the through holes are vertically opened on the outer vertical surface of the support ring along the horizontal direction, and the bolts pass through the through holes and are threadedly connected to the threaded holes.

[0009] The advantages of the utility model are: the high-temperature resistant anti-corrosion coating layer is used to prevent the weld from being exposed, the high-temperature resistant anti-corrosion coating layer is used to provide closed protection for the weld at the connection between the support ring and the cylinder to reduce the risk of leakage, the high-temperature resistant anti-corrosion coating layer is then covered and protected by a stainless steel plate, and finally the high-temperature resistant anti-corrosion coating layer and the stainless steel plate are clamped between the cylinder and the support by a support for further reinforcement, thereby achieving a sealing effect. Description of the drawings:

[0010] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0011] In the figure: 1. bottom head, 2. support ring, 2.1. annular slot, 2.2. threaded hole, 3. cylinder, 4. support, 4.1. through hole, 5. high temperature resistant anticorrosive coating layer, 6. stainless steel plate, 7. bolt. Specific implementation method:

[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0013] See also Figure 1 The utility model provides a technical solution for the protective structure of an ammonia synthesis tower:

[0014] A protective structure for an ammonia synthesis tower comprises a bottom end cap 1 and a support ring 2 welded to the end face of the bottom end cap 1, wherein the connection end of the upper surface of the support ring 2 is connected to the connection end of a cylinder 3 by surfacing welding; further comprising a support 4, a high temperature resistant anti-corrosion coating layer 5 and a stainless steel plate 6; the support ring 2 is vertically provided with an annular slot 2.1 along the horizontal outer end, a plurality of supports 4 are evenly inserted in the annular slot 2.1, the bottom of the support 4 is fixed in the annular slot 2.1 by bolts 7, the high temperature resistant anti-corrosion coating layer 5 surrounds and fills the outer surface of the connection between the support ring 2 and the cylinder 3, and the weld is not exposed, and the high temperature resistant anti-corrosion coating layer 5 can effectively protect the weld at the connection between the support ring 2 and the cylinder 3 from corrosion, improve the acid and alkali resistance, protect the weld from oxidation and corrosion, and play the role of closed protection, etc.; the stainless steel plate 6 is welded to the outer upper surface of the support ring 2 and coated on the outer side of the high temperature resistant anti-corrosion coating layer 5 to protect it; the high temperature resistant anti-corrosion coating layer 5 and the stainless steel plate 6 are sandwiched between the cylinder 3 and the support 4.

[0015] The support ring 2 is located on the upper surface of the annular slot 2.1 with the inclined direction facing downwards. The support 4 is in a "卜"-shaped structure, aiming to make the lower surface of the middle part of the support 4 fit with the upper surface of the annular slot 2.1. The bottom of the support 4 is provided with a through hole 4.1. A plurality of threaded holes 2.2 adapted to the through hole 4.1 are formed in the horizontal outer vertical surface along the inner edge of the support ring 2. The bolt 7 passes through the through hole 4.1 and is threadedly connected to the threaded hole 2.2 to fix the support 4. At the same time, it is also to further reinforce the high-temperature resistant and corrosion-resistant coating layer 5 and the stainless steel plate 6 through the support 4, playing a sealing role.

[0016] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. 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 protective structure for an ammonia synthesis tower, comprising a bottom head (1) and a support ring (2) welded to the end surface of the bottom head (1), wherein the connection end of the upper surface of the support ring (2) is connected to the connection end of the cylinder (3) by surfacing welding; characterized in that: It also includes a support (4), a high-temperature resistant and corrosion-resistant coating layer (5) and a stainless steel plate (6); a circular slot (2.1) is vertically formed at the outer end of the support ring (2) along the horizontal direction, a plurality of supports (4) are evenly inserted into the circular slot (2.1), the bottom of the support (4) is fixed in the circular slot (2.1) by bolts (7), the high-temperature resistant and corrosion-resistant coating layer (5) is filled around the outer surface of the connection between the support ring (2) and the cylinder body (3), and the stainless steel plate (6) is welded around the upper surface of the outer side of the support ring (2) and covers the outside of the high-temperature resistant and corrosion-resistant coating layer (5); the high-temperature resistant and corrosion-resistant coating layer (5) and the stainless steel plate (6) are clamped between the cylinder body (3) and the support (4).

2. The protective structure for an ammonia synthesis tower according to claim 1, characterized in that: The upper surface of the support ring (2) where the circular slot (2.1) is located inclines downward, the support (4) is in a "卜" character structure, the lower surface of the middle part of the support (4) fits with the upper surface of the circular slot (2.1), and the bottom of the support (4) is provided with a through hole (4.1).

3. The protective structure for an ammonia synthesis tower according to claim 2, characterized in that: A plurality of threaded holes (2.2) adapted to the through holes (4.1) are formed in the vertical surface of the outer side along the horizontal direction in the support ring (2), and the bolts (7) pass through the through holes (4.1) and are threadedly connected with the threaded holes (2.2).

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