CN216919078U

CN216919078U - Gas phase reactor with intermediate support

Info

Publication number: CN216919078U
Application number: CN202220430153.XU
Authority: CN
Inventors: 陈孙艺
Original assignee: Challenge Petrochemical Machinery Corp
Current assignee: Challenge Petrochemical Machinery Corp
Priority date: 2022-03-01
Filing date: 2022-03-01
Publication date: 2022-07-08
Anticipated expiration: 2032-03-01

Abstract

The utility model relates to the technical field of petrochemical equipment, in particular to a gas phase reactor with an intermediate support, which comprises a cylinder, an upper end enclosure, a lower end enclosure and a skirt support, wherein the upper end enclosure and the lower end enclosure are positioned at two end parts of the cylinder, the skirt support is positioned at the bottom of the cylinder, a discharge hole is formed in the lower end part of the cylinder, a reactant backflow hole is formed in the upper end part of the cylinder, the intermediate support is arranged between the discharge hole and the reactant backflow hole of the cylinder, the intermediate support comprises a lining ring and a support lug, the lining ring is welded on the outer side wall of the cylinder, and the support lug is welded on the lining ring and arranged around the cylinder in the circumferential direction. Compared with the prior art, the intermediate support is arranged on the barrel body, so that the intermediate support becomes the original point of the structural moment, the moment generated by the acting force applied to the reactor by the intermittent circulation of the inlet and outlet pipelines can be mutually offset, and the internal pressure bearing effect of the barrel body is enhanced, so that the reactor is easy to weld, low in manufacturing and cost, free of vibration, fatigue and noise reduction, and long in service life.

Description

Gas phase reactor with intermediate support

Technical Field

The utility model relates to the technical field of petrochemical equipment, in particular to a gas phase reactor with an intermediate support.

The reactor or heat exchanger is mainly used in various reactors or heat exchangers in petroleum refining and chemical industry, coal chemical industry, chemical fertilizer industry, and other various chemical industry, air-conditioning, air-cooling, power facility equipment and the like, and particularly relates to a pressure vessel with load circulation or frequent fluctuation of operation parameters, such as a polypropylene gas phase reactor.

Background

The shell of the pressure vessel is provided with an opening connecting pipe, and the structure of the connecting pipe is different according to the size of the process parameters of the vessel and the difference of the functions of the connecting pipe. Since the pressure vessel is frequently operated at high temperature and high pressure or cyclically repeatedly operated, the opening nipple must have a long-lasting high strength and excellent sealability.

The main structure of the polypropylene gas phase reactor is shown in a front view in figure 1 and a top view in figure 2, the operation process is a continuous circulation process, and circulating gas in one circulation path is used for enabling a reaction bed to generate laminar flow and reverse rolling, so that the reaction is uniform; the second circulation path is that the material enters from the side of the reactor, the reactant removes the reaction heat when leaving the reactor, specifically the catalyst and the reactant are sent into the reactor from the G port continuously, the granular reactant is removed from the reactor from the C1, C2 ports discontinuously, most of the reactant is removed as the product, the C3, C4 ports are a small amount of reactant return ports, these four ports bear the alternating additional pipeline force in the normal working condition and unloading, have three characteristics in structure:

first, the conventional flanged joint pipe opening connection structure directly bears the effect of circulating thrust from a pipeline, and a serious structural problem exists in specific analysis of fig. 1 and fig. 2, wherein a pipeline acting force T1 of a discharge port C1 and a pipeline acting force T2 of a discharge port C2 have a force arm H12 from the bottom of a skirt, and the two generate a moment M12 which is H12(T1+ T2) cos phi. The line force T4 at reactant return C3 and the line force T4 at return C4 have a moment arm H34 from the bottom of the skirt, which produces a moment M34 equal to H34(T3+ T4) cos phi. As a result of this stress, the reactor as a whole is subjected to the cyclic action of the two line moments M12 and M34. The lower reactor section often cannot be checked for strength in fatigue analysis design, and therefore needs to be reinforced to resist the action of external pipelines.

Secondly, the conventional flanged joint pipe opening connecting structure directly bears the action of circulating thrust from a pipeline, the height distance between the return ports C3 and C4 and the height distance between the discharge ports C1 and C2 is equivalent to a moment arm H13 or H24, and the two moment arms generate a moment M13 which is T1H 13 or a moment M24 which is T2H 24 respectively. In the gas phase reactor vertically installed through the skirt, the lower end is fixed, the upper end is suspended, and the return ports C3 and C4 apply additional moment to dangerous cross sections at the weakening part of the bottom of the skirt and a manhole thereof, and also apply the two moments to the discharge ports C1 and C2, so that the opening connection structures of the discharge ports C1 and C2 cannot pass strength verification in fatigue analysis design, and therefore, the effect of an external pipeline needs to be resisted by material grading.

Thirdly, the traditional flanged joint pipe opening connecting structure directly bears the action of cyclic thrust from a pipeline, the pipeline acting force T1 of a discharge port C1 and the pipeline acting force T2 of a discharge port C2 have an arm of force from the assembly welding seam of the lower head and the top of the skirt, the pipeline acting force T4 of a reactant return port C3 and the pipeline acting force T4 of a return port C4 have a larger arm of force from the assembly welding seam of the lower head and the top of the skirt, the two also generate moment of force acting on the assembly welding seam of the lower head and the top of the skirt, and the stressed result is that the welding seam is difficult to weld through, the cross section belongs to a dangerous cross section, and the additional moment makes the cross section more difficult to pass through strength verification in fatigue analysis design, so that the optimized structure and the good-quality welding seam are required to resist the action of external pipelines.

It follows that such an overall structural arrangement and opening partial structure are not unreasonably stressed structures, the cyclic loads potentially put a risk of potentially fatigue cracking of the discharge orifice of the casing and the associated dangerous section of the skirt, while polypropylene is a flammable and explosive medium, and once leaked outside the casing, it would cause a significant safety hazard to the whole polypropylene installation.

Disclosure of Invention

In view of the above technical problems in the prior art, the present invention provides a gas phase reactor with an intermediate support.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a gas phase reactor with intermediate support, including the barrel, be located the upper cover and the low head at barrel both ends, be located the skirt of barrel bottom, the lower tip of barrel is equipped with the discharge gate, and the upper end of barrel is equipped with reactant backward flow mouth, characterized by: an intermediate support is arranged between the discharge port and the reactant return port of the barrel body, the intermediate support comprises a lining ring and support lugs, the hoop of the lining ring is welded on the outer side wall of the barrel body, and the support lugs are welded on the lining ring and are circumferentially arranged around the barrel body.

Specifically, the number of the support lugs is multiple, and the support lugs are arranged around the annular plate in a spaced mode.

Specifically, each support lug comprises a top plate, a bottom plate and a rib plate, the top plate and the bottom plate are parallel and are respectively and vertically welded to the lining ring, and the rib plate is welded between the top plate and the bottom plate in an assembling mode.

Specifically, the end surfaces of the top plate, the bottom plate and the rib plate are arc-shaped, so that the end surfaces are welded on the side wall of the lining ring in a close fit manner.

Specifically, the support lug comprises a top ring plate, a bottom ring plate and a connecting plate, the top ring plate and the bottom ring plate are parallel to each other and are respectively welded on the lining ring in a vertical annular hoop mode, and the connecting plate is welded between the top ring plate and the bottom ring plate.

Specifically, the end faces of the top ring plate, the bottom ring plate and the connecting plate are arc-shaped, so that the top ring plate, the bottom ring plate and the connecting plate are welded on the side wall of the lining ring in a tight fit mode.

Specifically, the top ring plate, the bottom ring plate and the connecting plate are steel plates.

Specifically, one side of the support lug, which is positioned on the axial symmetry between the barrel and the discharge port, is provided with a foundation bolt fastening point.

Specifically, the support lug is provided with a support reinforcing structure.

Specifically, a cone is arranged between the upper end enclosure and the cylinder body, and the diameter of the cone is gradually increased from bottom to top.

The utility model has the beneficial effects that:

compared with the prior art, the gas phase reactor with the intermediate support has the advantages that the intermediate support is arranged on the cylinder body, so that the intermediate support becomes the original point of structural moment, the moment generated by the acting force applied to the reactor by the intermittent circulation of the inlet and outlet pipelines can be mutually offset, and the internal pressure bearing effect of the cylinder body is enhanced, so that the reactor is easy to weld, low in manufacturing and cost, free of vibration, fatigue resistant, noise-reducing and long in service life.

Drawings

FIG. 1 is a front view of a reactor of the prior art, including the discharge ports C1, C2 and the schematic orientation of the reactant return ports C3, C4.

FIG. 2 is a top view of an open orientation of a prior art reactor including the schematic orientation of outlet ports C1 and C2 and reactant return ports C3 and C4.

FIG. 3 is a schematic structural view of a gas phase reactor with intermediate support in an example.

Fig. 4 is a schematic structural diagram of a desk type support lug in the embodiment.

FIG. 5 is a schematic structural view of another embodiment of the gas phase reactor with intermediate support of the present invention.

Fig. 6 is a top view at a-a of fig. 5.

Fig. 7 is a schematic view illustrating a lug reinforcing structure.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings.

The gas phase reactor with the intermediate support of the embodiment, as shown in fig. 3 and 4, comprises a cylinder 1, an upper head 2 and a lower head located at two ends of the cylinder, a skirt 3 located at the bottom of the cylinder 1, and a cone 6 between the upper head 2 and the cylinder 1, the diameter of which is gradually increased from bottom to top. The lower end part of the cylinder body 1 is provided with a discharge port C1/C2, and a flange with a discharge port is connected with a pipe flange 4; the upper end of the cylinder 1 is provided with a reactant return port C3/C4, which is connected with a pipe flange 5 from a flange with the reactant return port. The middle support is arranged between the discharge port and the reactant return port of the barrel body 1, the middle support comprises two types, the first type of table type support lug 7 comprises a lining ring 7-1 and a plurality of support lugs as shown in figure 4, the lining ring 7-1 is welded on the outer side wall of the barrel body 1 in a hoop mode, the support lugs are arranged around a ring plate in a spaced mode, each support lug comprises a steel top plate 7-2, a steel bottom plate 7-3 and a rib plate 7-4, the top plate 7-2 and the bottom plate 7-3 are parallel and are respectively welded on the lining ring 7-1 in a vertical mode, and the rib plates 7-4 are welded between the top plate 7-2 and the bottom plate 7-3 in a group mode. Specifically, the end faces of the top plate 7-2, the bottom plate 7-3 and the rib plate 7-4 are arc-shaped, so that the end faces are welded on the side wall of the backing ring 7-1 in a close fit mode.

The second loop brace 8, as shown in fig. 5 and 6, comprises a lining loop 8-1, a top loop plate 8-2, a bottom loop plate 8-3 and a connecting plate 8-4, wherein the top loop plate 8-2 and the bottom loop plate 8-3 are parallel and vertically welded to the lining loop 8-1 respectively, and the connecting plate 8-4 is welded between the top loop plate 8-2 and the bottom loop plate 8-3. The end faces of the top ring plate 8-2, the bottom ring plate 8-3 and the connecting joint plates 8-4 are curved so as to be welded to the side wall of the backing ring 8-1 in close fitting. The top ring plate 8-2, the bottom ring plate 8-3 and the connecting plate 8-4 are steel plates.

In the embodiment, no matter the lining ring is 7-1 or 8-1, the lining ring is connected with the barrel 1 in a pre-tightening matching mode, the lining ring is a low barrel with the inner diameter equal to the outer diameter of the barrel 1 at the position where the lining ring is installed and welded, after blanking and manufacturing based on the actual outer diameter size of the barrel 1, the longitudinal joint is temporarily left and is not welded and sleeved outside the barrel 1 of the reactor, the inner wall of the lining ring is tightly attached to the outer wall of the barrel 1, the longitudinal joint of the lining ring is welded after the lining ring and the barrel are fixed, the barrel is hooped by cooling and shrinking of the longitudinal joint, the barrel generates compression stress, and the capacity of bearing internal pressure and temperature difference thermal stress is stronger. The longitudinal weld of the backing ring is shown at 7-1-1 in FIG. 4.

Specifically, one side of the support lug, which is positioned on the axial symmetry of the barrel 1 and the discharge port, is provided with a foundation bolt fastening point. This shortens the arm of force and most effectively reduces the moment and its damage to the reactor.

Specifically, the support lug is provided with a support reinforcing structure which comprises a top ring and a bottom ring for expanding the width and a thickened and encrypted rib plate, so that the bearing surface of force can be expanded, and the moment can be resisted more effectively. Such as the unequal width loop lugs 9 shown in fig. 7.

Compared with the prior art, the gas phase reactor with the intermediate support respectively adopts technical innovations in aspects of arrangement position of the intermediate support on the reactor, structural shape optimization of the intermediate support, assembly welding form of the intermediate support and a cylinder body and the like, so that an improved new structure can simultaneously take internal pressure bearing and fatigue resistance into consideration, is free from vibration and easy to design, is convenient to manufacture and weld, simplifies technical requirements of maintenance, detection and the like, and is economical and reasonable.

The intermediate support determines the pairing heights H1 and H2 on the cylinder body through mechanical optimization design, so that the intermediate support becomes the origin of structural moment, the moment generated by the acting force applied to the reactor by the intermittent circulation of the inlet and outlet pipelines can be mutually offset, and the internal pressure bearing effect of the cylinder body is enhanced, so that the reactor is easy to weld and manufacture and low in cost, does not vibrate, is fatigue-resistant, reduces noise and prolongs the service life.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a gas phase reactor with intermediate support, includes the barrel, is located the upper cover and the low head at barrel both ends, is located the skirt of barrel bottom, and the lower tip of barrel is equipped with the discharge gate, and the upper end of barrel is equipped with reactant backward flow mouth, characterized by: an intermediate support is arranged between the discharge port and the reactant return port of the barrel, the intermediate support comprises a lining ring and support lugs, the lining ring hoop is welded on the outer side wall of the barrel, and the support lugs are welded on the lining ring and arranged circumferentially around the barrel.

2. A gas phase reactor with intermediate support as claimed in claim 1, wherein: the number of the support lugs is multiple, and the support lugs are arranged around the annular plate in a spaced mode.

3. A gas phase reactor with intermediate support as claimed in claim 2, wherein: each support lug comprises a top plate, a bottom plate and a rib plate, wherein the top plate and the bottom plate are parallel and are respectively and vertically welded on the lining ring, and the rib plate is welded between the top plate and the bottom plate in an assembling mode.

4. A gas phase reactor with intermediate support as claimed in claim 3, wherein: the end surfaces of the top plate, the bottom plate and the rib plate are arc-shaped, so that the end surfaces are welded on the side wall of the lining ring in a close fit mode.

5. A gas phase reactor with intermediate support as claimed in claim 1, wherein: the support lug comprises a top ring plate, a bottom ring plate and connecting plates, the top ring plate and the bottom ring plate are parallel to each other and are respectively welded on the lining ring in a vertical annular hoop mode, and the connecting plates are welded between the top ring plate and the bottom ring plate.

6. A gas phase reactor with intermediate support as claimed in claim 5, wherein: the end faces of the top ring plate, the bottom ring plate and the connecting plate are arc-shaped, so that the top ring plate, the bottom ring plate and the connecting plate are welded on the side wall of the lining ring in a close fit mode.

7. A gas phase reactor with intermediate support as claimed in claim 5 wherein: the top ring plate, the bottom ring plate and the connecting plate are steel plates.

8. A gas phase reactor with intermediate support as claimed in claim 1, wherein: one side of the support lug, which is positioned on the axial symmetry of the barrel and the discharge port, is provided with a foundation bolt fastening point.

9. A gas phase reactor with intermediate support as claimed in claim 1, wherein: the support lug is provided with a support reinforcing structure.

10. A gas phase reactor with intermediate support as claimed in claim 1, wherein: a cone is arranged between the upper end enclosure and the cylinder body, and the diameter of the cone is gradually increased from bottom to top.