CN216445015U - Vertical ammonia converter electric heater - Google Patents

Abstract

The utility model provides an electric heater of a vertical ammonia converter, which comprises a shell and an internal part, wherein the shell sequentially comprises an outlet flange, a lower tee joint, an inlet flange, a lower end part of a cylinder body, the cylinder body, an upper end part of the cylinder body and a flat cover from bottom to top, and the flat cover is provided with an opening for inserting an electric furnace wire; the internals include clamping ring, lower packing, lower fixing clip, connecting pipe, lower support piece, last support piece, go up the connecting pipe, go up fixing clip, go up packing and last clamping ring down by supreme down in proper order, and the through-hole has all been seted up to the lateral wall of lower support piece and last connecting pipe. The vertical ammonia converter electric heater provided by the utility model has a vertical single-inlet single-outlet structure, occupies small area, has high heating speed and is suitable for small and medium-sized ammonia plants.

Description

Vertical ammonia converter electric heater

Technical Field

The utility model relates to the technical field of ammonia synthesis, in particular to an electric heater of a vertical ammonia synthesis tower.

Background

In national economy, ammonia occupies an important position, and has great significance particularly on agricultural production. Ammonia is also a very important industrial raw material, and in the chemical fiber and plastic industries, ammonia, nitric acid and urea are used as nitrogen sources to produce caprolactam, nylon and other products. Ammonia is also used in a wide variety of other industries. In the sectors of petroleum refining, rubber industry, metallurgical industry and machining, as well as in the sectors of the light industry, food industry and pharmaceutical industry, ammonia and its processed products are indispensable.

The hydrogen and nitrogen are synthesized into ammonia at high temperature and high pressure under the action of a catalyst. The ammonia synthesis tower is the heart of the ammonia synthesis plant, and the electric heater is the most important auxiliary equipment of the ammonia synthesis tower. When the ammonia synthesis tower is started, an electric heater is needed to provide a heat source for the catalyst heating reduction of the synthesis tower, and the electric heater can also be applied to the heating after the ammonia synthesis tower is stopped or the treatment after an accident. The electric heater arranged outside the synthesis tower has the advantages of simple structure, safety, reliability, convenient manufacture, installation and maintenance and wide application.

The conventional electric heater of the ammonia converter adopts a double-inlet and double-outlet structure, has large flow rate, is suitable for a large-scale ammonia converter, and is not suitable for a small-scale ammonia converter. Therefore, how to provide an electric heater suitable for small and medium ammonia plants is a problem that needs to be solved urgently by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides an electric heater for a vertical ammonia converter, which has a single-inlet and single-outlet vertical heating structure and is suitable for small and medium ammonia plants.

In order to achieve the purpose, the utility model provides an electric heater of a vertical ammonia synthesis tower, which comprises a shell and an internal part, wherein the shell sequentially comprises an outlet flange, a lower tee joint, an inlet flange, a lower end part of a cylinder body, the cylinder body, an upper end part of the cylinder body and a flat cover from bottom to top, the lower tee joint is hermetically connected with the outlet flange, the inlet flange and the lower end part of the cylinder body, the upper end part of the cylinder body is hermetically connected with the flat cover, the cylinder body is fixedly connected with the lower end part of the cylinder body and the upper end part of the cylinder body by welding, and the flat cover is provided with an opening for inserting an electric furnace wire; the internal part includes lower clamping ring by supreme down in proper order, lower packing, lower fixing clip, lower connecting pipe, lower support piece, go up the connecting pipe, go up fixing clip, go up packing and last clamping ring, wherein lower clamping ring passes through bolt fixed connection with lower fixing clip, lower packing is close to the periphery that lower clamping ring set up fixing clip under, it passes through bolt fixed connection with last fixing clip to go up the clamping ring, it sets up the periphery at last fixing clip to go up the packing ring, lower fixing clip passes through welded fastening with lower connecting pipe and is connected, lower connecting pipe and lower support piece pass through welded fastening with upper support piece and are connected, lower support piece is located the upper end periphery of connecting pipe down, upper support piece passes through welded fastening with the upper connecting pipe and is connected, upper connecting pipe passes through welded fastening with last fixing clip and is connected, the through-hole has all been seted up to the lateral wall of lower support piece and upper connecting pipe.

Optionally, the lower tee joint is hermetically connected with the outlet flange and the inlet flange, and the upper end part of the cylinder body is hermetically connected with the flat cover through a stud, a nut and an omega-shaped sealing ring; the lower tee joint is hermetically connected with the lower end part of the cylinder body through a stud, a nut and an octagonal gasket.

Optionally, a rigid ring ear seat and a lifting lug are welded on the periphery of the barrel, and lifting eye screws are arranged on the flat cover and the side part of the lower tee joint.

Optionally, the side wall of the lower supporting member is provided with 4 through holes uniformly distributed around the circumference, and the side wall of the upper connecting pipe is provided with 12 rows of 288 through holes uniformly distributed around the circumference.

Optionally, the bottom periphery of the lower support member and the top inner side of the lower end of the barrel are provided with matching slopes.

Optionally, the periphery of the lower part of the upper connecting pipe is provided with a heat-insulating sleeve, one end of the heat-insulating sleeve is welded to the upper supporting piece, the other end of the heat-insulating sleeve is welded to the upper connecting pipe through a heat-insulating fixing block, and a heat-insulating material is filled between the heat-insulating sleeve and the upper connecting pipe.

Optionally, the top of the upper fixing clip is welded with a lifting lug, and a supporting rib plate is welded between the upper connecting pipe and the upper fixing clip.

Optionally, a stirring device is further arranged in the upper connecting pipe.

Optionally, the inner walls of the upper connecting pipe and the lower connecting pipe are further coated with a thermal insulation coating.

Compared with the prior art, the vertical ammonia converter electric heater provided by the utility model has the following beneficial effects:

(1) compared with the large-flow electric heater with a double-inlet and double-outlet structure in the prior art, the vertical ammonia converter electric heater provided by the utility model has a vertical single-inlet and single-outlet structure. Before reaction, mixed gas can enter a gap between the shell and the internal part through a cold gas inlet on the side part of the lower tee joint, rises along the gap, enters the internal part through a through hole of the upper connecting pipe, is heated by an electric furnace wire extending through the flat cover, then flows downwards, and flows out through a hot gas outlet at the bottom of the lower tee joint. The vertical single-inlet single-outlet structure occupies small area, has high heating speed and is suitable for small and medium ammonia plants;

(2) in the aspect of a sealing structure, the vertical ammonia converter electric heater provided by the utility model adopts a thread fixing mode with omega sealing rings at a cold air inlet, a hot air outlet and a flat cover part, has simple assembly and good sealing performance, is not easily influenced by pressure and temperature changes, adopts a thread fixing mode with an octagonal gasket between the lower end part of a cylinder body and a lower tee joint, and is convenient for dismounting for multiple times so as to check an internal part and a shell;

(3) in the aspect of heat preservation, the heat preservation sleeve is arranged on the periphery of the lower part of the upper connecting pipe through which the mixed gas flows immediately after being heated, and the heat preservation material is filled between the heat preservation sleeve and the upper connecting pipe, so that the mixed gas is not easy to release heat to the surrounding medium after being heated, and flows out from a hot gas outlet at a higher temperature by carrying the heat.

Drawings

In order to more clearly illustrate the technical solution of the present invention, embodiments of the present invention will be further illustrated and described with reference to the following drawings, which are provided only for the purpose of more conveniently and specifically describing embodiments of the present invention and not for the purpose of limiting the same.

FIG. 1 is a schematic diagram of the overall structure of a vertical ammonia synthesis tower electric heater provided according to an exemplary embodiment of the present invention;

FIG. 2 is a schematic diagram of the internal structure of an electric heater for a vertical ammonia converter according to an exemplary embodiment of the present invention;

FIG. 3 is a schematic view of a flat cover structure of an electric heater for a vertical ammonia converter according to an exemplary embodiment of the present invention;

FIG. 4 is a schematic view showing a connection structure of a lower pressure ring, a lower coil and a lower fixing clip of the vertical ammonia synthesis tower electric heater according to an exemplary embodiment of the present invention;

FIG. 5 is a schematic view showing a connection structure of an upper compression ring, an upper packing and an upper fixing clip of the vertical ammonia synthesis tower electric heater according to an exemplary embodiment of the present invention;

FIG. 6 is a schematic view showing a connection structure of an inlet flange, an omega-shaped seal ring and a lower tee of the vertical ammonia converter electric heater according to an exemplary embodiment of the present invention;

FIG. 7 is a schematic view showing a connection structure of a lower tee, an octagonal mat and a lower end portion of a drum of an electric heater for a vertical ammonia synthesis tower according to an exemplary embodiment of the present invention;

FIG. 8 is a schematic view showing a connection structure of an upper end portion of a cylinder, an omega-shaped seal ring and a flat cover of a vertical ammonia synthesis tower electric heater according to an exemplary embodiment of the present invention;

FIG. 9 is a schematic cross-sectional view of a lower support of a vertical ammonia synthesis tower electric heater provided in accordance with an exemplary embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of an upper connecting pipe of an electric heater of a vertical ammonia converter provided according to an exemplary embodiment of the present invention; and

fig. 11 is a schematic view of the connection structure of an upper connection pipe, a heat-insulating sleeve and a heat-insulating fixing block of an electric heater for a vertical ammonia converter according to an exemplary embodiment of the present invention.

In the figure: 1 is an outlet flange, 2 is a lower tee joint, 3 is an inlet flange, 4 is the lower end part of a cylinder body, 5 is the cylinder body, 6 is the upper end part of the cylinder body, 7 is a flat cover, 8 is a lower pressing ring, 9 is a lower disc root, 10 is a lower fixing clip, 11 is a lower connecting pipe, 12 is a lower supporting piece, 13 is an upper supporting piece, 14 is an upper connecting pipe, 15 is an upper fixing clip, 16 is an upper disc root, 17 is an upper pressing ring, 18 is an omega-shaped sealing ring, 19 is an octagonal pad, 20 is a rigid ring lug, 21 is a lifting lug, 22 is a lifting ring screw, 23 is a heat-insulating sleeve, 24 is a heat-insulating fixing block, 25 is a heat-insulating material, and 26 is a supporting rib plate; n1 is a cold air inlet, N2 is a hot air outlet, and e 1-3 is an electric wire opening.

Detailed Description

The utility model provides an electric heater of a vertical ammonia converter, which has a vertical single-inlet single-outlet structure, small floor area and high heating speed and is suitable for small and medium-sized ammonia plants.

In a preferred embodiment of the present invention, there is provided a vertical ammonia synthesis tower electric heater comprising a shell and internals, for example with reference to fig. 1-5. Fig. 1 is a schematic diagram of an overall structure of a vertical ammonia synthesis tower electric heater according to an exemplary embodiment of the present invention, and as shown in fig. 1, a housing sequentially includes, from bottom to top, an outlet flange 1, a lower tee 2, an inlet flange 3, a lower cylinder end 4, a cylinder 5, an upper cylinder end 6, and a flat cover 7, where the lower tee 2 is hermetically connected to the outlet flange 1, the inlet flange 3, and the lower cylinder end 4, the upper cylinder end 6 is hermetically connected to the flat cover 7, the cylinder 5 is fixedly connected to the lower cylinder end 4 and the upper cylinder end 6 by welding, and the flat cover 7 is provided with an opening for inserting an electric furnace wire. The structure of the flat cover 7 can refer to fig. 3, fig. 3 is a schematic structural view of the flat cover of the vertical ammonia converter electric heater provided according to an exemplary embodiment of the utility model, as shown in fig. 3, the top center of the flat cover 7 is separately provided with 3 electric furnace wire ports e 1-3 for inserting electric furnace wires for heating; the top of the flat cover 7 is provided with a plurality of holes for inserting bolts at the periphery, so that the bolts can be inserted and nuts can be added to realize the sealing connection between the flat cover and the upper end of the cylinder. FIG. 2 is a schematic structural diagram of an internal component of a vertical ammonia synthesis tower electric heater according to an exemplary embodiment of the present invention, as shown in FIG. 2, the internal component sequentially includes, from bottom to top, a lower press ring 8, a lower base 9, a lower fixing clip 10, a lower connecting pipe 11, a lower support 12, an upper support 13, an upper connecting pipe 14, an upper fixing clip 15, an upper base 16, and an upper press ring 17, wherein the lower press ring 8 is fixedly connected with the lower fixing clip 10 by a bolt, the lower base 9 is disposed at an outer periphery of the lower fixing clip 10 near the lower press ring 8, the upper press ring 17 is fixedly connected with the upper fixing clip 15 by a bolt, the upper base 16 is disposed at an outer periphery of the upper fixing clip 15 near the upper press ring 17, the lower fixing clip 10 is fixedly connected with the lower connecting pipe 11 by welding, the lower connecting pipe 11 and the lower support 12 are fixedly connected with the upper support 13 by welding, the lower support 12 is located at an upper end outer periphery of the lower connecting pipe 11, the upper supporting piece 13 is fixedly connected with the upper connecting pipe 14 through welding, the upper connecting pipe 14 is fixedly connected with the upper fixing clip 15 through welding, and through holes are formed in the side walls of the lower supporting piece 12 and the upper connecting pipe 14. Referring to fig. 4, fig. 4 is a schematic view of a connection structure of a lower compression ring 8, a lower coil 9 and a lower fixing clip of an electric heater for a vertical ammonia synthesis tower according to an exemplary embodiment of the present invention, wherein the lower compression ring 8 and the lower fixing clip 10 are fastened together by bolts, and the lower fixing clip 10 is provided with a packing 9 near the periphery of the lower compression ring 8, and when the bolts are gradually tightened, the packing 9 deforms and fills a gap between the lower fixing clip 10 and a lower tee joint 2, thereby achieving sealing between a housing and an internal member. The connection structure between the upper pressing ring 17, the upper coil 16 and the upper fixing clip 15 can be referred to fig. 5, and the fixing and sealing structure thereof is similar to the lower pressing ring 8, the lower coil 9 and the lower fixing clip 10.

The working principle of the vertical ammonia converter electric heater provided by the present invention will now be described with reference to fig. 1: mixed gas required by ammonia production reaction is fed into a gap between a shell and an internal part through a cold air inlet N1 formed by an inlet flange 3 and a lower tee joint 2, the mixed gas rises along the gap and enters a gap between a cylinder 5 and an upper connecting pipe 14 through a through hole of a lower support piece 12 and a gap between the lower tee joint 2 and a lower connecting pipe 11, then the mixed gas enters the inner part of the upper connecting pipe 14 through a through hole of the upper connecting pipe 14, the mixed gas flows downwards after being heated by electric furnace wires extending through electric furnace wire ports e 1-3 on a flat cover 7, and therefore the mixed gas flows out from a hot air outlet N2 formed by the lower tee joint 2 and an outlet flange 1 through the lower connecting pipe 11. The ammonia converter electric heater provided by the utility model has a single-inlet single-outlet vertical structure, mixed gas to be reacted can flow in from a single inlet and flow out from a single outlet close to the inlet after being heated, and the ammonia converter electric heater has a simple structure and small occupied space, and is suitable for being used as an ammonia converter electric heater of small and medium-sized ammonia plants.

In a preferred embodiment of the utility model, the lower tee joint 2 and the outlet flange 1 and the inlet flange 3 as well as the upper end part 6 of the cylinder body and the flat cover 7 can be hermetically connected through a stud, a nut and an omega-shaped sealing ring 18; the lower tee joint 2 and the lower end part 4 of the cylinder body can be connected in a sealing way through a stud, a nut and an octagonal gasket 19. That is, the vertical ammonia synthesis tower electric heater provided by the utility model adopts a thread fixing mode with the omega-shaped sealing ring 18 at the connecting part of the cold air inlet N1, the connecting part of the hot air outlet N2 and the connecting part of the flat cover 7 and the upper end part 6 of the cylinder body, and the connecting parts are all connected among pipelines and are rarely disassembled after assembly, so the omega-shaped sealing ring 18 which has simple installation, complex disassembly and good sealing performance and is not easily influenced by pressure and temperature changes is adopted for sealing. A thread fixing mode with an octagonal cushion 19 is adopted between the lower end part 4 of the barrel and the lower tee joint 2, the octagonal cushion 19 is simple in structure and easy to disassemble and assemble, and maintenance personnel can conveniently overhaul the internal part and the shell at any time. The connection structure between the inlet flange 3, the omega-shaped sealing ring 18 and the lower tee 2 can refer to fig. 6; the connection structure among the lower tee joint 2, the octagonal cushion 19 and the lower end part 4 of the cylinder body can refer to fig. 7; the connection structure between the upper end 6 of the cartridge, the omega-shaped sealing ring 18 and the flat cover 7 can be seen in fig. 8; the connection structure between the inlet flange 3 and the lower tee 2 is similar to the connection structure between the outlet flange 1 and the lower tee 2, and reference can also be made to fig. 6.

In a preferred embodiment of the present invention, a rigid lug seat 20 and a lifting lug 21 are welded to the outer circumference of the cylinder 5. As shown in fig. 1, a rigid lug seat 20 and a lifting lug 21 can be welded on the periphery of the cylinder 5 at proper positions, the rigid lug seat 20 can be used for bearing the weight of the whole equipment and tangential force and local stress caused by eccentricity of the equipment or thermal expansion of the pipeline, and the lifting lug can be used for lifting the casing before the internal part is installed and lifting the whole equipment after the internal part is installed. In a preferred embodiment of the utility model, the flat cover 7 and the side of the lower tee 2 are each provided with an eye screw 22. As shown in FIG. 1, threaded holes for screwing the lifting eye screws 22 are formed in the side parts of the flat cover 7 and the lower tee joint 2, and the lifting eye screws 22 are screwed into the threaded holes to lift corresponding components during assembly of the whole equipment or independent transportation of equipment components. The screw hole may be provided at an optional position at the side of the flat cover 7, and is preferably provided at the side of the lower tee 2 opposite to the cold air inlet N1.

In a preferred embodiment of the present invention, the side wall of the lower supporter 12 is opened with 4 circumferentially uniformly distributed through holes, and the side wall of the upper connection pipe 14 is opened with 12 rows of 288 circumferentially uniformly distributed through holes, for example, refer to fig. 9 and 10. Fig. 9 is a schematic cross-sectional view of a lower supporter of a vertical ammonia synthesis tower electric heater according to an exemplary embodiment of the present invention, and as shown in fig. 9, the side wall of the lower supporter 12 is provided with 4 circumferentially-distributed through holes for allowing the mixed gas from the cold air inlet N1 to enter into the gap between the cylinder 5 and the upper connection pipe 14 from the gap between the lower tee 2 and the lower connection pipe 11. Fig. 10 is a schematic cross-sectional view of an upper connection pipe of a vertical ammonia synthesis tower electric heater according to an exemplary embodiment of the present invention, and as shown in fig. 10, the side wall of the upper connection pipe 14 is provided with 12 rows of 288 circumferentially-distributed through holes, each row having 24 through holes, so that the through holes distributed in a close-packed manner not only allow the mixed gas to enter the inside of the upper connection pipe 14 from the gap between the upper connection pipe 14 and the drum 5, but also help the mixed gas to be more uniformly mixed and heated. It will be understood by those skilled in the art that when different pipe diameters and pipe lengths are used, any suitable number of through holes may be formed at suitable positions on the upper connecting pipe 14.

In a preferred embodiment of the utility model the bottom periphery of the lower support 12 and the top inside of the lower end 4 of the cartridge are provided with matching slopes. As shown in fig. 1 and 2, after the respective components of the internal part and the housing are assembled, the internal part is placed inside the housing, and the bottom periphery of the lower support 12 and the slope of the inside of the top of the lower end 4 of the cylinder allow the internal part to be stably placed inside the housing. It should be noted that there is no need to provide a sealing structure, because the bevel is located right between the lower connecting pipe 11 and the lower tee 2, and some of the mixed gas that has penetrated into the bevel gap does not leak or enter the interior of the lower connecting pipe 11 in advance, but flows up along the gap between the inner piece and the casing as the gas passes through the through holes of the lower support 12.

In a preferred embodiment of the present invention, a heat insulating sleeve 23 is provided on the lower outer circumference of the upper connection pipe 14. For example, referring to fig. 2 and 11, fig. 2 is a schematic structural diagram of the internal components of the vertical ammonia synthesis tower electric heater provided according to an exemplary embodiment of the present invention, and fig. 11 is a schematic structural diagram of the connection structure of the upper connection pipe, the heat-insulating sleeve and the heat-insulating fixing block of the vertical ammonia synthesis tower electric heater provided according to an exemplary embodiment of the present invention. As shown in fig. 2 and 11, one end of the heat-insulating sleeve 23 is welded to the upper supporting member 13, the other end of the heat-insulating sleeve 23 is welded to the upper connecting pipe 14 through a heat-insulating fixing block 24, and a heat-insulating material 25 is filled between the heat-insulating sleeve 23 and the upper connecting pipe 14. The heat preservation layer formed by the heat preservation material 25 between the heat preservation sleeve 23 and the upper connecting pipe 14 enables the mixed gas to be heated and not easy to release heat to the pipe wall of the upper connecting pipe 14, and therefore heating efficiency is further improved. The thermal insulation material 25 may use any material known in the art, such as glass fiber, which has good insulation, high heat resistance, good corrosion resistance, and high mechanical strength. It should be noted that the heat-insulating sleeve 23 should not cover or block the through hole opened at the upper portion of the upper connection pipe 14 so as not to block the flow of the mixed gas.

In a preferred embodiment of the present invention, a lifting lug is welded to the top of the upper fixing clip 15, and a support rib 26 is welded between the upper connection pipe 14 and the upper fixing clip 15. As shown in fig. 2, the lifting lugs are used to lift the entire trim in order to fit the trim into the housing; the support rib 26 is used to further reinforce the connection between the upper fixing clip 15 and the upper connection pipe 14, so as to prevent the upper fixing clip 15 and the upper connection pipe 14 from falling off during lifting.

In a preferred embodiment of the present invention, a stirring device is further disposed in the upper connection pipe 14, and the stirring device is used for mixing the mixed gas more uniformly. For example, the stirring device may be disposed at the lower inner side of the through hole portion of the upper connection pipe 14, so that the mixed gas can be further mixed after being heated, and at the same time, the stirring device may rebound part of the gas upwards to be heated again, thereby improving the heating efficiency. Alternatively or additionally, the heating wire may have a stirring function or a stirring device may be inserted into the upper connection pipe together with the heating wire through the heating wire ports e 1-3 to stir while heating.

In a preferred embodiment of the present invention, the inner walls of the upper and lower connection pipes 14 and 11 are further coated with a thermal insulation coating. The heat-insulating coating layer makes the heated mixed gas difficult to radiate heat to the outside of the upper connecting pipe 14 and the lower connecting pipe 11, thereby improving the utilization rate of the heat.

It is to be understood that the devices and/or structures of the various embodiments provided in this invention may be combined, modified and/or altered to form new solutions. Without inventive step, these solutions are also intended to be included within the scope of the utility model as claimed.

While a number of specific examples are provided in the embodiments provided herein, it will be understood that these examples are intended in an illustrative rather than in a limiting sense. Embodiments of the utility model may be practiced without these specific examples. In some instances, structures and/or techniques that are well known to those skilled in the art have not been shown in detail in order not to obscure the understanding of this description.

While preferred embodiments of the present invention have been shown and described herein, it will be readily understood by those skilled in the art that these embodiments are provided by way of example only. Numerous variations, changes, and substitutions will now occur to those skilled in the art without departing from the utility model. It should be understood that various alternatives to the embodiments of the utility model described herein are optionally employed in practicing the utility model. It is intended that the scope of the utility model be defined by the claims and that devices, structures, and equivalents within the scope of these claims be covered thereby.

Claims (9)

1. An electric heater of a vertical ammonia converter, which comprises a shell and an internal part and is characterized in that,

the shell sequentially comprises an outlet flange (1), a lower tee joint (2), an inlet flange (3), a lower barrel end (4), a barrel (5), an upper barrel end (6) and a flat cover (7) from bottom to top, wherein the lower tee joint (2) is hermetically connected with the outlet flange (1), the inlet flange (3) and the lower barrel end (4), the upper barrel end (6) is hermetically connected with the flat cover (7), the barrel (5) is fixedly connected with the lower barrel end (4) and the upper barrel end (6) through welding, and the flat cover (7) is provided with an opening for inserting an electric furnace wire;

the inner part sequentially comprises a lower pressing ring (8), a lower coil (9), a lower fixing clip (10), a lower connecting pipe (11), a lower supporting piece (12), an upper supporting piece (13), an upper connecting pipe (14), an upper fixing clip (15), an upper coil (16) and an upper pressing ring (17) from bottom to top, wherein the lower pressing ring (8) is fixedly connected with the lower fixing clip (10) through a bolt, the lower coil (9) is close to the lower pressing ring (8) and is arranged at the periphery of the lower fixing clip (10), the upper pressing ring (17) is fixedly connected with the upper fixing clip (15) through a bolt, the upper coil (16) is close to the upper pressing ring (17) and is arranged at the periphery of the upper fixing clip (15), the lower fixing clip (10) is fixedly connected with the lower connecting pipe (11) through welding, the lower connecting ring (11) is fixedly connected with the upper supporting piece (13), lower support piece (12) are located the upper end periphery of lower connecting pipe (11), go up support piece (13) with go up connecting pipe (14) and pass through welded fastening and connect, go up connecting pipe (14) with go up retaining clip (15) and pass through welded fastening and connect, lower support piece (12) with the through-hole has all been seted up to the lateral wall of last connecting pipe (14).

2. The vertical ammonia converter electric heater according to claim 1,

the lower tee joint (2) is connected with the outlet flange (1) and the inlet flange (3) in a sealing way and the upper end part (6) of the cylinder body is connected with the flat cover (7) in a sealing way through a stud, a nut and an omega-shaped sealing ring (18);

the lower tee joint (2) and the lower end part (4) of the cylinder body are connected in a sealing mode through a stud, a nut and an octagonal gasket (19).

3. The vertical ammonia converter electric heater according to claim 1,

the periphery welding of barrel (5) has rigidity ring ear seat (20) and lug (21), flat lid (7) with the lateral part of lower part tee bend (2) all is provided with eyebolt (22).

4. The vertical ammonia converter electric heater according to claim 1,

the lateral wall of lower support piece (12) is seted up 4 circumference equipartitions the through-hole, the lateral wall of going up connecting pipe (14) is seted up 12 rows 288 circumference equipartitions the through-hole totally.

5. The vertical ammonia converter electric heater according to claim 1,

the bottom periphery of the lower supporting piece (12) and the top inner side of the lower end part (4) of the cylinder body are provided with matched inclined planes.

6. The vertical ammonia converter electric heater according to claim 1,

the heat-insulating sleeve is characterized in that a heat-insulating sleeve (23) is arranged on the periphery of the lower portion of the upper connecting pipe (14), one end of the heat-insulating sleeve (23) is welded to the upper supporting piece (13), the other end of the heat-insulating sleeve (23) is welded to the upper connecting pipe (14) through a heat-insulating fixing block (24), and a heat-insulating material (25) is filled between the heat-insulating sleeve (23) and the upper connecting pipe (14).

7. The vertical ammonia converter electric heater according to claim 1,

lifting lugs are welded at the tops of the upper fixing clips (15), and supporting rib plates (26) are further welded between the upper connecting pipe (14) and the upper fixing clips (15).

8. The vertical ammonia converter electric heater according to claim 1,

and a stirring device is also arranged in the upper connecting pipe (14).

9. The vertical ammonia converter electric heater according to claim 1,

the inner walls of the upper connecting pipe (14) and the lower connecting pipe (11) are coated with heat-insulating coatings.

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