A heat insulation device for a reactor of an ammonia converter internal

Abstract

The utility model discloses a kind of heat insulation devices for synthetic ammonia tower inner part reactor, it includes heat-insulating layer inner wall, ceramic fiber heat-insulating layer, aluminium foil layer, stainless steel mesh, heat-insulating layer outer wall, hot melt screw, ceramic fiber heat-insulating layer is laid in the outer surface of heat-insulating layer inner wall, ceramic fiber heat-insulating layer is coated with an aluminium foil layer, aluminium foil layer is coated with an stainless steel mesh, heat-insulating layer outer wall is coated in the outer layer of stainless steel mesh, is fixedly connected with heat-insulating layer inner wall by hot melt screw, the utility model structure design is reasonable, entire heat insulation mechanism connection is stable and reliable, the reaction cavity and annular gap passage of inner part reactor can be effectively heat-insulated.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment manufacturing, specifically to a heat insulation device for a reactor internal component of a synthetic ammonia tower. Background Technology

[0002] The chemical reactions that take place inside the ammonia synthesis tower, such as the Haber process for ammonia synthesis, are typical exothermic processes. The tower contains a catalyst reaction chamber and a heat exchange chamber. During the reaction, a large amount of heat is generated. The temperature of the catalyst reaction chamber is generally around 450 degrees Celsius, while the inner wall of the pressure vessel is designed to be below 60 degrees Celsius, which is also the temperature requirement for the process gas annular channel. Therefore, it is necessary to design a heat insulation mechanism to insulate the reaction chamber and the annular channel. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a heat insulation device for the reactor internals of a synthetic ammonia tower, which can effectively insulate the reaction chamber and annular channel.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows: A heat insulation device for the reactor internals of a synthetic ammonia tower includes an inner wall of an insulation layer, a ceramic fiber insulation layer, an aluminum foil layer, a stainless steel mesh, an outer wall of the insulation layer, and hot-melt screws. The ceramic fiber insulation layer is laid on the outer surface of the inner wall of the insulation layer. An aluminum foil layer is wrapped around the ceramic fiber insulation layer, and a stainless steel mesh is wrapped around the aluminum foil layer. The outer wall of the insulation layer is wrapped around the stainless steel mesh and is fixedly connected to the inner wall of the insulation layer by hot-melt screws.

[0005] Furthermore, multiple locking pins are evenly arranged on the outer surface of the inner wall of the insulation layer. The lower end of the locking pin is welded and fixed to the outer surface of the inner wall of the insulation layer. The pin shaft passes through the ceramic fiber insulation layer, the aluminum foil layer, and the stainless steel metal mesh. The top of the pin is spot-welded with a locking plate, which presses against the metal mesh to stabilize the entire insulation functional layer. The locking plate is set between the metal mesh and the outer wall of the insulation layer.

[0006] Furthermore, the locking plate is a circular gasket with a circular hole in the center for the end of the locking pin to pass through. After the end of the locking pin passes through the circular hole, it is pressed and folded to one side and welded to the locking plate.

[0007] Furthermore, the inner and outer walls of the insulation layer are made of stainless steel and are assembled into a cylindrical structure. The inner wall of the insulation layer forms the inner cylinder, and the outer wall of the insulation layer forms the outer cylinder. Together, they form a cylindrical structure, with a ceramic fiber insulation layer filling the space between the inner and outer cylinders.

[0008] Furthermore, a support ring is provided at the upper or lower end of the inner wall of the insulation layer, and the upper and lower ends of the outer wall of the insulation layer are welded and fixed to the support ring.

[0009] Furthermore, the hot-melt screw is a bowl-shaped structure with a riveted edge. A fixing hole is pre-reserved on the outer wall of the insulation layer. The riveted edge of the hot-melt screw presses against the fixing hole. The bottom of the hot-melt screw is spot-welded to the inner wall of the insulation layer for hot-melt fixation, so that the outer cylindrical wall of the insulation layer is tightly attached to the outside of the ceramic fiber insulation layer.

[0010] Furthermore, the inner wall of the insulation layer also serves as a supporting structure for the cylindrical skeleton, and its thickness is greater than that of the outer wall of the insulation layer.

[0011] The stainless steel mesh is made of high-temperature resistant nickel-chromium wire.

[0012] Furthermore, a sealing ring is fixed to the upper end of the outer cylinder formed by the outer wall of the insulation layer, which is welded and fixed to the inner cylinder formed by the inner wall of the insulation layer and the outer cylinder formed by the outer wall of the insulation layer.

[0013] The device also includes top and bottom caps, whose insulation structure is the same as that of the cylinder, which together form the insulation part of the internal reactor.

[0014] The beneficial effects of this utility model are as follows: This utility model has a reasonable structural design and the entire heat insulation mechanism is stably and reliably connected, which can effectively insulate the reaction chamber and annular channel of the internal reactor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the locking pin in an embodiment of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the locking pin according to an embodiment of the utility model; Figure 4 This is a schematic diagram of the thermoplastic screw structure according to an embodiment of the present invention; Figure 5 This is a partial structural diagram of the top cap in an embodiment of the present invention; Figure 6 This is a partial structural diagram of the bottom cap in an embodiment of the present utility model.

[0016] The components include: 1. Inner wall of the insulation layer; 2. Ceramic fiber insulation layer; 3. Aluminum foil layer; 4. Stainless steel mesh; 5. Outer wall of the insulation layer; 6. Hot melt screw; 7. Locking pin; and 8. Locking plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0018] As shown in the attached figure, a heat insulation device for the reactor internals of a synthetic ammonia tower includes an inner wall of insulation layer 1, a ceramic fiber insulation layer 2, an aluminum foil layer 3, a stainless steel mesh 4, an outer wall of insulation layer 5, and hot-melt screws 6. The ceramic fiber insulation layer is laid on the outer surface of the inner wall of the insulation layer. The ceramic fiber insulation layer 2 is covered with an aluminum foil layer 3, and the aluminum foil layer 3 is covered with a stainless steel mesh 4. The outer wall of the insulation layer 5 is covered with the stainless steel mesh 4 and is fixedly connected to the inner wall of the insulation layer 1 by hot-melt screws 6.

[0019] Furthermore, multiple locking pins 7 are uniformly arranged on the outer surface of the inner wall 1 of the insulation layer. The lower end of the locking pin 7 is welded and fixed to the outer surface of the inner wall of the insulation layer. Its pin bar passes through the ceramic fiber insulation layer, the aluminum foil layer, and the stainless steel metal mesh. Its top end is spot-welded with a locking plate 8. The locking plate 8 presses against the metal mesh 4, which can stabilize the entire insulation functional layer. The locking plate 8 is set between the metal mesh 4 and the outer wall 5 of the insulation layer.

[0020] Furthermore, the locking plate 8 is a circular gasket with a circular hole in its center for the end of the locking pin 7 to pass through. After the end of the locking pin passes through the circular hole, it is pressed and folded to one side and welded to the locking plate 8.

[0021] Furthermore, the inner wall 1 and the outer wall 5 of the insulation layer are made of stainless steel and are assembled into a cylindrical structure. The inner wall 1 of the insulation layer forms the inner cylinder, and the outer wall 5 of the insulation layer forms the outer cylinder. Together, they form a cylindrical structure, and the space between the inner cylinder and the outer cylinder is a heat insulation cavity filled with a ceramic fiber insulation layer 2.

[0022] Furthermore, a support ring is provided at the upper or lower end of the inner wall of the insulation layer, and the upper and lower ends of the outer wall of the insulation layer are welded and fixed to the support ring.

[0023] Furthermore, the hot melt screw 6 is a bowl-shaped structure with a riveted edge. The outer wall 5 of the insulation layer has a pre-reserved fixing hole. The riveted edge of the hot melt screw presses against the fixing hole. The bottom of the hot melt screw 6 is spot-welded to the inner wall 1 of the insulation layer for hot melt fixation, so that the outer wall 5 of the insulation layer is tightly attached to the outside of the ceramic fiber insulation layer.

[0024] Furthermore, the inner wall 1 of the insulation layer also serves as a supporting structure for the cylindrical skeleton, and its thickness is greater than that of the outer wall 5 of the insulation layer.

[0025] The stainless steel mesh 4 is made of high-temperature resistant nickel-chromium wire.

[0026] Furthermore, a sealing ring is fixed to the upper end of the outer cylinder formed by the outer wall 5 of the insulation layer, which is welded and fixed to the inner cylinder formed by the inner wall of the insulation layer and the outer cylinder formed by the outer wall of the insulation layer.

[0027] The device also includes a top cover and a bottom cover, whose insulation structure layer has the same structure as the cylinder insulation layer, and together they form the insulation part of the internal reactor.

[0028] The above-described preferred embodiments of the present invention are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A heat insulation device for the reactor internals of an ammonia synthesis tower, characterized in that: It includes an inner wall of insulation layer, a ceramic fiber insulation layer, an aluminum foil layer, a stainless steel mesh, an outer wall of insulation layer, and thermoplastic screws. The ceramic fiber insulation layer is laid on the outer surface of the inner wall of insulation layer. An aluminum foil layer is wrapped around the ceramic fiber insulation layer, and a stainless steel mesh is wrapped around the aluminum foil layer. The outer wall of insulation layer is wrapped around the stainless steel mesh and is fixedly connected to the inner wall of insulation layer by thermoplastic screws.

2. The heat insulation device for the reactor internals of the ammonia synthesis tower according to claim 1, characterized in that: Multiple locking pins are evenly arranged on the outer surface of the inner wall of the insulation layer. The lower end of the locking pin is welded and fixed to the outer surface of the inner wall of the insulation layer. The pin bar passes through the ceramic fiber insulation layer, the aluminum foil layer, and the stainless steel metal mesh. The top of the pin is spot-welded with a locking plate. The locking plate presses against the metal mesh, which can stabilize the entire insulation functional layer. The locking plate is set between the metal mesh and the outer wall of the insulation layer.

3. The heat insulation device for the reactor internals of the ammonia synthesis tower according to claim 2, characterized in that: The locking plate is a circular gasket with a circular hole in the center for the end of the locking pin to pass through. After the end of the locking pin passes through the circular hole, it is pressed and folded to one side and welded to the locking plate.

4. The heat insulation device for the reactor internals of the ammonia synthesis tower according to claim 1, characterized in that: The inner and outer walls of the insulation layer are made of stainless steel and are assembled into a cylindrical structure. The inner wall of the insulation layer forms the inner cylinder, and the outer wall of the insulation layer forms the outer cylinder. Together, they form a cylindrical structure, with a ceramic fiber insulation layer filling the space between the inner and outer cylinders.

5. The heat insulation device for the reactor internals of the ammonia synthesis tower according to claim 1, characterized in that: A support ring is provided at the upper or lower end of the inner wall of the insulation layer, and the upper or lower end of the outer wall of the insulation layer is welded and fixed to the support ring.

6. The heat insulation device for the reactor internals of the ammonia synthesis tower according to claim 1, characterized in that: The hot-melt screw is a bowl-shaped structure with a riveted edge. The outer wall of the insulation layer has a pre-drilled fixing hole. The riveted edge of the hot-melt screw presses against the fixing hole. The bottom of the hot-melt screw is spot-welded to the inner wall of the insulation layer for hot-melt fixation, so that the outer wall cylinder of the insulation layer is tightly attached to the outside of the ceramic fiber insulation layer.

7. The heat insulation device for the reactor internals of the ammonia synthesis tower according to claim 1, characterized in that: The inner wall of the insulation layer also serves as a supporting structure for the cylindrical frame, and its thickness is greater than that of the outer wall of the insulation layer.

8. The heat insulation device for the reactor internals of the ammonia synthesis tower according to claim 1, characterized in that: The stainless steel mesh is made of high-temperature resistant nickel-chromium wire.

9. The heat insulation device for the reactor internals of the ammonia synthesis tower according to claim 1, characterized in that: An encapsulation ring is fixed to the upper end of the outer wall of the insulation layer, which is welded and fixed to the inner cylinder formed by the inner wall of the insulation layer and the outer cylinder formed by the outer wall of the insulation layer.

10. The heat insulation device for the reactor internals of the ammonia synthesis tower according to claim 1, characterized in that: The device also includes a top cover and a bottom cover, whose insulation structure is the same as that of the cylinder, and together they form the insulation part of the internal reactor.

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