CN217368304U

CN217368304U - Gas phase reactor with symmetrical feeding and discharging ports

Info

Publication number: CN217368304U
Application number: CN202220430136.6U
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: 2022-09-06
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 symmetrical feeding and discharging ports, which comprises a cylinder body, a cone, an upper end socket and a lower end socket, wherein the lower end socket is fixed at the lower end part of the cylinder body, the cone is fixed between the upper end part of the cylinder body and the upper end socket, and the cone is arranged in an upward gradually expanding way; more than two feed inlets are arranged at the part of the cylinder body close to the lower end enclosure, and different feed inlets are symmetrically arranged relative to the axis of the cylinder body; the part of the cylinder body close to the cone is provided with more than two backflow ports, and different backflow ports are symmetrically arranged relative to the axis of the cylinder body. The device can mutually offset acting forces applied to the reactor respectively, and simultaneously has the advantages of internal pressure resistance, fatigue resistance, no material blockage, easy welding and low cost, so that the reactor is not only fatigue resistant, but also the medium reaction is uniform and smooth, the material accumulation can not block the inlet and the outlet, and the service life is prolonged.

Description

Gas phase reactor with symmetrical feeding and discharging ports

Technical Field

The utility model relates to a petrochemical equipment technical field specifically is arranged in various reactors or heat exchanger technical field in petroleum refining and chemical industry, coal chemical industry, chemical fertilizer industry and other various chemical industry, air conditioner, air cooling, electric power facility equipment etc. specifically relates to a gas phase reactor with symmetrical formula business turn over material mouth.

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 often operated at high temperature and high pressure or repeatedly operated cyclically, the open 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 continuously fed into the reactor from the inlet together, the granular reactant is intermittently removed from the reactor from the C1 and C2 ports, most of the reactant is removed as the product, the C3 and C4 ports are a small amount of reactant return ports, the four ports bear alternating additional pipeline force under normal working condition and unloading, and the structure has three characteristics:

the first is that the traditional flanged joint pipe opening connection structure directly bears the action of circulating thrust from a pipeline, and the lower section of the reactor often cannot pass through strength verification in fatigue analysis design, so that a flange without a joint pipe is required to be used as a connection structure with an external pipeline. Analyzing that a serious structural problem exists in fig. 1 and fig. 2, a half included angle phi between two discharge ports or two return ports, a tilt angle theta of the discharge ports and the discharge ports, a pipeline acting force T1 of a discharge port C1 and a pipeline acting force T2 of a discharge port C2 have a small difference in size and a small included angle 2 phi exists in the direction, and a resultant force T12 is formed by the two, namely (T1+ T2) cos phi. The line force T4 at reactant return C3 and the line force T4 at return C4 are also slightly different in magnitude and have a small angle 2 phi in direction, and they form a total force T34 which is (T3+ T4) cos phi. As a result of this stress, the reactor as a whole is subjected to a cycle of pipeline thrust T-T12 + T34.

Secondly, the traditional flange connecting pipe opening connecting structure directly bears the action of circulating thrust from a pipeline, and the opening connecting structure often cannot pass through strength verification in fatigue analysis design, so that a flange without a connecting pipe is required to be used as a connecting structure with an external pipeline. The partial shell wall between the discharge port C1 and the discharge port C2 is subjected to the circulation action of T12, and the partial shell wall between the return port C3 and the discharge port C4 is also subjected to the circulation action of T34. It follows that such a global structural arrangement and open partial structure are not reasonable stress structures, the cyclic loads potentially risk fatigue cracking of the casing, while polypropylene is a flammable and explosive medium, and once leaked outside the casing, it can cause a significant safety hazard to the whole polypropylene device.

Thirdly, in order to avoid the reactant from blocking the opening and not flowing during the unloading process of the gap, the inner angles of the reactant outlet and the return opening are designed into a conical expanding opening flange by a traditional right-angle connecting pipe, the opening strength is further weakened, and the material strength of the flange structure is often required to be adjusted. These two unique structural features present significant difficulties and costs to reactor design, open structure verification, manufacture and maintenance, the most difficult of which is fatigue analysis-resistant design of the structure.

Therefore, the connection structure between the material inlet and outlet opening connecting pipe and the pressure container shell is developed, can simultaneously take internal pressure bearing and fatigue resistance into consideration, is free from material blockage and easy to design, is convenient to manufacture and weld, simplifies the technical requirements of maintenance, detection and the like and has low cost and economy, and has important engineering significance when being applied to a reactor in the field of petrochemical industry.

Disclosure of Invention

There is above-mentioned whole or partial technical problem to prior art, the utility model provides a gas phase reactor with symmetrical formula business turn over material mouth can satisfy and receive interior pressure and fatigue-resistant, can not putty and easy design, is convenient for make and weld, simplifies technical requirement such as maintenance and detection and low-cost economic requirement.

In order to achieve the above object, the utility model provides a following technical scheme:

the gas phase reactor with the symmetrical material inlet and material outlet comprises a cylinder body, a cone, an upper end enclosure and a lower end enclosure, wherein the lower end enclosure is fixed at the lower end part of the cylinder body; more than two feed inlets are arranged at the part of the cylinder body close to the lower end enclosure, and different feed inlets are symmetrically arranged relative to the axis of the cylinder body; the part of the cylinder body close to the cone is provided with more than two backflow ports, and different backflow ports are symmetrically arranged relative to the axis of the cylinder body.

Specifically, feed inlet and/or backward flow mouth are equipped with fixing base and nozzle, and fixing base and barrel lateral wall welding, the nozzle is located the outside of fixing base, and fixing base and nozzle are opened there is the feed port.

Specifically, the pipe socket and the fixing seat are integrated forged pieces.

Specifically, the feed port is the toper, and just toward keeping away from barrel direction internal diameter and diminishing gradually.

Specifically, the feeding hole is arranged perpendicular to the cylinder, tangentially to the inner wall of the cylinder in the circumferential direction or obliquely in the radial direction.

Specifically, the pipe connecting seat is a frustum-shaped flange, and a stud blind hole is formed in the end face of the flange.

Specifically, the pipe socket is a short pipe-shaped pipe body, a stud blind hole or a pipe flange is arranged on the end face of the pipe body, and a stud through hole is formed in the pipe flange.

The utility model has the advantages that:

the utility model discloses a gas phase reactor with symmetrical formula business turn over material mouth because the axis symmetrical arrangement of the relative barrel of different feed inlets, the axis symmetrical arrangement of the relative barrel of different backward flow mouth can offset its effort of applying for the reactor separately each other, compromise simultaneously and receive interior pressure, fatigue-resistant, not putty, easy welding and low cost, make the reactor both fatigue-resistant, the medium reaction is even smooth moreover, do not gather the material and block up exit, life extension.

Drawings

FIG. 1 is a front view of a reactor of the prior art, which includes outlet ports C1 and C2 and reactant return ports C3 and C4.

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

FIG. 3 is a schematic front view of a gas phase reactor with symmetrical inlet and outlet ports according to the present application.

FIG. 4 is a schematic top view of a gas phase reactor configuration with symmetrical inlet and outlet ports of the present application, omitting the orientation of the openings except for ports D1, D2 and reactant return ports D3, D4.

Fig. 5 is a schematic view of a first implementation of an open connection structure of a gas phase reactor with symmetrical inlet and outlet ports according to the present application.

FIG. 6 is a schematic view of a second embodiment of an open junction configuration of a gas phase reactor with symmetrical inlet and outlet ports according to the present application.

FIG. 7 is a schematic view of a third embodiment of an open junction configuration of a gas phase reactor with symmetrical inlet and outlet ports according to the present application.

FIG. 8 is a schematic view of a fourth embodiment of an open connection structure of a gas phase reactor with symmetrical inlet and outlet ports according to the present application.

Reference numbers of fig. 3-8:

a cylinder body 1, an upper seal head 2, a skirt 3, a fixed seat 4, a pipe connecting seat 5 and a cone 6,

the flanges 4-1 are provided with a flange,

a pipe body 5-1, a pipe connecting flange 5-2,

the stud blind hole 7-1, the stud through hole 7-2, the flange transition conical surface 8 and the butt weld 9.

Detailed Description

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

The gas phase reactor with the symmetrical material inlet and outlet of the embodiment, as shown in fig. 3 to 8, comprises a cylinder 1, a cone 6, an upper end enclosure 2 and a lower end enclosure, wherein a skirt 3 is arranged below the cylinder 1, the lower end enclosure is fixed at the lower end part of the cylinder 1, the cone 6 is fixed between the upper end part of the cylinder 1 and the upper end enclosure 2, and the cone 6 is arranged in an upward and gradually expanding manner. More than two feed inlets D1/D2 are arranged at the part of the cylinder body 1 close to the lower end enclosure, and different feed inlets D1/D2 are symmetrically arranged relative to the axis of the cylinder body 1. The part of the cylinder body 1 close to the cone 6 is provided with more than two backflow ports D3/D4, and different backflow ports D3/D4 are symmetrically arranged relative to the axis of the cylinder body 1.

The thrust of the foreign pipeline borne by the axisymmetric structure can be counteracted by the opposite direction of the acting force, as shown in fig. 3 and 4. The pipeline acting force T1 of the discharge port D1 and the pipeline acting force T2 of the discharge port D2 are mutually offset if the pipeline acting force T1 and the pipeline acting force T2 are equal and opposite in direction, and T1 and T2 are not greatly different and can be basically mutually offset due to the opposite acting directions; the line force T3 at the reactant return port D3 and the line force T4 at the return port D4 are also equal or slightly different in magnitude and opposite in direction, and substantially cancel each other out. After the external loads completely offset or offset most of the external loads, the stress conditions of the whole reactor and the opening structure can be improved, the stress level is reduced, and the structural strength design check is easier to pass.

Specifically, feed inlet D1/D2 and backward flow mouth D3/D4 are equipped with fixing base 4 and nozzle 5, and fixing base 4 passes through butt weld 9 with barrel 1 lateral wall and welds, and nozzle 5 is located the outside of fixing base 4, and fixing base 4 and nozzle 5 open there is the feed port.

Specifically, the pipe socket 4 and the fixing seat 5 are integrated forged pieces, no welding seam exists in the manufacturing of the integrated forged pieces, the materials are uniform, and the anti-fatigue capability is strong. The fixed seat 4 is butted with the cylinder body 1 along the wall thickness, and the wall thickness butted with the cylinder body 1 comprises the wall thickness after equal wall thickness and slightly different wall thicknesses. The groove of butt welding is convenient for welding, the welding seam has good quality, the residual height is removed, and the anti-fatigue capability is strong. As shown in fig. 5, 6, 7 and 8.

Specifically, the feed port is the toper, and toward keeping away from 1 direction internal diameter of barrel and diminishing gradually. Or the feeding hole is a straight hole.

Specifically, as shown in fig. 5 and 6, the pipe connecting seat is a frustum-shaped flange 4-1, the outer side of the pipe connecting seat is a flange transition conical surface 8, and the end face of the flange 4-1 is provided with a stud blind hole 7-1. Or the connecting pipe seat is a short tubular pipe body 5-1 as shown in figure 7, the end face of the pipe body 5-1 is provided with a stud blind hole 7-1, or the end face of the pipe body 5-1 as shown in figure 8 is provided with a connecting pipe flange 5-2, and the connecting pipe flange 5-2 is provided with a stud through hole 7-2.

Generally, thick-walled structures are more capable of withstanding the static load of internal pressure than thin-walled structures, while flexible structures are more resistant to fatigue than rigid structures. Due to the improved forces, the new flange can be designed thicker than conventional flanges so that the stud holes for attaching the flanges of the foreign pipeline do not weaken the new flange too much. The pipe connecting flange can move a stud hole connected with an external pipeline flange on the original flange to the flange, and the structure welded with the wall thickness of the reactor cylinder is protected to the maximum extent. The local structure of the flange or the pipe body is in smooth transition without sharp corners. Has strong anti-fatigue capability. The cylindrical surface forming the right-angled step in the conventional flange is changed to a cone in the present application, and the structural transition is smooth, as shown at 8 in fig. 5 and 6.

Specifically, the feeding hole is arranged perpendicular to the cylinder 1, arranged tangentially to the inner wall of the cylinder 1 in the circumferential direction or arranged obliquely in the radial direction to form an angle phi. The inner wall surfaces of the connecting pipes which are radially and vertically connected and circumferentially and tangentially connected are arranged as conical surfaces or cambered surfaces, so that the inner wall of the shell close to the pressure container is smooth, stress concentration is reduced, materials can be changed in the cambered surfaces to generate turbulent eddies to be more easily fed in and discharged under the action of inertia, and the feeding efficiency and the discharging efficiency of the materials are improved without blocking an inlet and an outlet. The connecting pipe which is connected in an upward inclined way along the radial direction can not store reaction materials naturally, and the materials flow back into the reactor under the action of dead weight, so that the inlet and outlet efficiency of the materials is improved, and an inlet and an outlet are not blocked. The flanges are shown in fig. 5 for the radial vertical connection, in fig. 6 for the radial upward inclined connection, and in fig. 7 and 8 for the radial upward inclined connection.

Compared with the prior art, the gas phase reactor with the symmetrical feeding and discharging ports has the advantages that the arrangement position of the inlet and the outlet on the reactor is respectively optimized, the shape of the opening connecting structure is optimized, the inclination angle of the pipe connecting flange relative to the cylinder body is optimized, the assembling and welding form of the opening connecting structure and the cylinder body is optimized, the local structure of the opening connecting structure is optimized, and the like, so that the improved new structure can simultaneously take internal pressure and fatigue resistance into consideration, material blockage and easiness in design are avoided, the manufacturing and welding are facilitated, the technical requirements for maintenance, detection and the like are simplified, and the gas phase reactor is economical and reasonable.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A gas phase reactor with symmetrical feeding and discharging ports is characterized in that: the device comprises a cylinder body, a cone, an upper end enclosure and a lower end enclosure, wherein the lower end enclosure is fixed at the lower end part of the cylinder body; more than two feed inlets are arranged at the part of the cylinder body close to the lower end enclosure, and different feed inlets are symmetrically arranged relative to the axis of the cylinder body; the part of the cylinder body close to the cone is provided with more than two backflow ports, and different backflow ports are symmetrically arranged relative to the axis of the cylinder body.

2. A gas phase reactor having symmetrical inlet and outlet ports as claimed in claim 1, wherein: the feed inlet and/or backward flow mouth are equipped with fixing base and nozzle, and the fixing base welds with the barrel lateral wall, and the nozzle is located the outside of fixing base, and fixing base and nozzle are opened there is the feed port.

3. A gas phase reactor having symmetrical inlet and outlet ports as claimed in claim 2, wherein: the connecting pipe seat and the fixed seat are integrated forging pieces.

4. A gas phase reactor having symmetrical inlet and outlet ports as claimed in claim 2, wherein: the feed port is the toper, and just toward keeping away from barrel direction internal diameter and diminishing gradually.

5. A gas phase reactor having symmetrical inlet and outlet ports as claimed in claim 2, wherein: the feeding hole is arranged vertically to the cylinder, tangentially to the inner wall of the cylinder in the circumferential direction or obliquely in the radial direction.

6. A gas phase reactor having symmetrical inlet and outlet ports as claimed in claim 2, wherein: the pipe connecting seat is a frustum-shaped flange, and a stud blind hole is formed in the end face of the flange.

7. A gas phase reactor having symmetrical inlet and outlet ports as claimed in claim 2, wherein: the pipe connecting seat is a pipe body in a short pipe shape, a stud blind hole or a pipe connecting flange is arranged on the end face of the pipe body, and a stud through hole is formed in the pipe connecting flange.