CN213995813U - Annular tube box suitable for vertical radial flow reactor and reactor - Google Patents

Abstract

The utility model discloses an annular pipe case and reactor suitable for vertical radial flow reactor, annular pipe case sets up inside the casing of reactor, and is located the tube bank both ends in the casing, the tube bank both ends are connected on the annular tube sheet of annular pipe case to communicate with the inner chamber of annular pipe case, annular pipe case and a plurality of takeover one end intercommunication, the other end of takeover passes the casing head of reactor and draws forth. The utility model discloses a tube bank middle part straight tube section and both ends pipe case are annular stringing, the probability of heat exchange tube both ends staggered arrangement has been reduced, the stringing mode on the annular tube sheet is the same with the stringing mode at tube bank middle part, thereby it is roughly the same to have guaranteed every heat exchange tube bending angle direction, this greatly reduced the design degree of difficulty and the manufacturing degree of difficulty, on the other hand, at tube bank bend section, each heat exchange intertube interval equals, the catalyst loads more evenly, reaction gas is regional here more even, can regard as effective reaction zone, thereby multiplicable reaction output.

Description

Annular tube box suitable for vertical radial flow reactor and reactor

Technical Field

The utility model belongs to the technical field of vertical type tube shell structure reactor, in particular to an annular tube case and reactor suitable for vertical radial flow reactor.

Background

A large-scale steam ascending type radial flow reactor, such as a methanol synthesis tower, is a reactor with a vertical shell-and-tube structure, and comprises a shell and an internal part inside the shell, wherein the internal part sequentially comprises a central distribution tube, a catalyst frame, a cylindrical gas collector connected with the inner wall of the shell, a tube bundle positioned in a catalyst area and the like from inside to outside along the radial direction from the center of equipment; wherein the upper and lower ends of the gas collector are respectively connected with the shell, so that an annular gas collecting area is formed between the gas collector and the shell. Reaction gas enters the central gas distribution pipe through the upper inlet pipe and the lower inlet pipe, the reaction gas is changed into radial flow to enter the catalyst bed for reaction after being uniformly distributed through the central gas distribution pipe, and the gas after reaction is collected by the external collector and then collected in the gas collection area and then flows out through the outlet pipe communicated with the collection area.

The heat of reaction in the radial direction is carried away by the tube bundle in the axial direction. Wherein, the tube bundle is the core component of the reactor. The reaction tubes are arranged along the axis of the shell of the reactor, and the middle parts of the reaction tubes are positioned and supported by the supporting plates. The reaction tubes are arranged in a triangular mode in the middle of the reactor, two ends of each reaction tube are integrated into four tube bundles through a circular tube plate, the four tube bundles are led out through four corresponding outlet pipes, and square tube arrangement is adopted on the circular tube plate. The straight tube that the reaction tube middle section was distributed for being the annular, both ends are respectively to four pipe plate set bendings formation for the tip changeover portion, the bending angle and the direction of the tip changeover portion of every heat exchange tube are all inequality, make the tube bank design and the manufacturing degree of difficulty very big, and, because the heat exchange tube middle part is arranged for the annular, both ends are arranged for following circular behind extending to four pipe plates, this leads to the phenomenon that heat exchange tube staggered arrangement appears in the tip changeover portion, the stringing of heat exchange tube has further been increaseed, the degree of difficulty of manufacturing and installation, need design alone to every heat exchange tube in the actual production, manufacture and installation, need consume a large amount of manpowers and time. In addition, since the heat exchange tubes are staggered at the end transition sections, these staggered areas cannot be filled with catalyst and become ineffective areas for reaction, reducing the performance of the equipment, and in addition, these areas also tend to cause impurity accumulation and are inconvenient to clean and overhaul.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: aiming at the technical problems, the annular tube box and the reactor which are suitable for the vertical radial flow reactor and can reduce the probability of staggered arrangement of the heat exchange tubes, increase the filling space of the catalyst and solve the problems of irregular space bending tube bundle design and manufacture are provided.

The technical scheme of the utility model is realized like this: an annular tube box suitable for a vertical radial flow reactor, characterized in that: the annular tube box is arranged in a shell of the reactor, and is positioned at two ends of a tube bundle in the shell, the two ends of the tube bundle are connected to an annular tube plate of the annular tube box and are communicated with an inner cavity of the annular tube box, the annular tube is communicated with one end of a plurality of connecting tubes, and the other end of each connecting tube penetrates through a shell seal head of the reactor and is led out.

Annular pipe case suitable for vertical radial flow reactor, its the tube bank includes a plurality of heat exchange tubes, the straight tube section at heat exchange tube middle part is arranged in order to form heat exchange tube bank in the annular range the cross section center of heat exchange tube bank forms installation space, the both ends of heat exchange tube are close to the tube bank center to be connected with annular tube sheet, fluid medium flows in the inner chamber of annular pipe case by the heat exchange tube.

Annular pipe case suitable for vertical radial flow reactor, its annular pipe case is enclosed by the inner cylinder that is close to the tube bank center, the outer cylinder, annular tube sheet and the pipe case head of keeping away from the tube bank center, the trompil is connected with the one end of takeover on the pipe case head.

Annular pipe case suitable for vertical radial flow reactor, its interior cylinder is connected with the inboard of pipe case head and annular tube sheet respectively, the outer cylinder is connected with the outside of pipe case head and annular tube sheet respectively, forms the inner space of annular pipe case through annular tube sheet, interior cylinder, pipe case head and outer cylinder.

Annular pipe case suitable for vertical radial flow reactor, its pipe case head is annular flat-cover head or annular half pipe head.

Annular pipe case suitable for vertical radial flow reactor, its annular pipe case sets up with the casing interval of reactor, tube bank and annular pipe case can be for the casing motion of reactor under the effect of thermal energy.

Annular pipe case suitable for vertical radial flow reactor, its the straight tube section at heat exchange tube middle part divide into four group's tube bundles at the circumferencial direction, and follow circumferencial direction evenly distributed, annular pipe case is divided into four regions that correspond with four group's tube bundles with annular pipe case inner space through the baffle of perpendicular to annular tube sheet terminal surface, is connected with the takeover on the annular pipe case that every region corresponds respectively.

Annular pipe case suitable for vertical radial flow reactor, its the arrangement mode of heat exchange tube is unanimous with the straight tube section stringing mode of tube bank on the annular tube sheet, stringing interval on the annular tube sheet is less than the stringing interval at middle part.

The utility model provides a reactor, includes the casing and in the casing inside from its central gas distribution pipe, interior catalyst frame, catalyst bed that radially from interior to exterior set gradually, with the cylinder gas collector of shells inner wall connection and be located the regional tube bank of catalyst, central gas distribution pipe both ends link to each other its characterized in that with gas inlet pipe respectively: and two ends of the tube bundle are respectively connected with the annular tube box.

The utility model discloses an annular pipe case mainly is applicable to vertical radial flow reactor, it is through setting up annular pipe case in the reactor, tube bank middle part straight tube section and both ends pipe case are annular stringing, the probability of the heat exchange tube by the heat exchange tube staggered arrangement of middle part to the in-process that extends at both ends has been reduced, the stringing mode on the annular tube sheet is the same with the stringing mode at tube bank middle part, only reduce the stringing interval of annular tube sheet, thereby it is roughly the same to have guaranteed that every heat exchange tube bending angle direction is about the same, this greatly reduced the design degree of difficulty and the manufacturing degree of difficulty. On the other hand, in the bending section of the tube bundle, the space between the heat exchange tubes is equal, the catalyst is filled more uniformly, and the reaction gas reacts more uniformly in the region and can be used as an effective reaction area, so that the reaction yield can be increased.

The utility model discloses reduced the probability of heat exchange tube staggered arrangement, increased the space that fills of catalyst, effectively solved the design and the manufacturing problem of the irregular crooked tube bank in space, under the circumstances such as do not change original technological parameter, the reactor of being convenient for makes, installs, operates and overhauls moreover.

Drawings

FIG. 1 is a schematic view of the reactor of the present invention.

FIG. 2 is a schematic diagram of the piping of a section B-B in the middle of the reactor.

Fig. 3 is a schematic structural diagram of the ring-shaped tube plate of the present invention.

Fig. 4 is another schematic structural diagram of the middle tube box of the present invention.

The labels in the figure are: the reactor comprises a reactor 1, a shell 2, a tube bundle 3, an annular tube box 4, a heat exchange tube 5, a straight tube section 7, an installation space 8, a tube bundle center 9, an annular tube plate 10, an inner cavity 11, a connecting tube 14, a shell end socket 15, an inner cylinder 16, an outer cylinder 17, a tube box end socket 18, a partition plate 21, a zone 22, a central gas distribution tube 23, a gas inlet tube 24, an inner catalyst frame 25, a catalyst bed layer 26 and a gas collector 27.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the indication of the position or the positional relationship is based on the position or the positional relationship shown in the drawings, or the position or the positional relationship that the utility model is usually placed when using, or the position or the positional relationship that the skilled person conventionally understands, or the position or the positional relationship that the utility model is usually placed when using, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or suggest that the indicated device or element must have a specific position, be constructed and operated in a specific position, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases for a person of ordinary skill in the art; the drawings in the embodiments are provided to clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Example 1:

as shown in fig. 1, 2 and 3, the annular channel box 4 is arranged inside the shell 2 of the reactor 1 and at two ends of the tube bundle 3 in the shell 2, the annular channel box 4 is arranged at a distance from the shell 2 of the reactor 1, i.e. the annular channel box is not fixedly connected with the reactor shell, and the tube bundle 3 and the annular channel box 4 can move relative to the shell 2 of the reactor 1 under the action of thermal expansion by separating the annular channel box from the reactor shell. Preferably, the annular tube box is machined by using a whole plate or a forged piece.

Specifically, the annular tube box 4 is formed by processing a whole plate or a forged piece, and is specifically surrounded by an inner cylinder 16 close to the center 9 of the tube bundle, an outer cylinder 17 far away from the center 9 of the tube bundle, an annular tube plate 10 and a tube box end enclosure 18, the tube bundle 3 includes a plurality of heat exchange tubes 5, the straight tube sections 7 in the middle of the heat exchange tubes 5 are arranged in an annular range to form a heat exchange tube bundle, an installation space 8 is formed in the center of the cross section of the heat exchange tube bundle, two ends of the heat exchange tubes 5 are close to the center 9 of the tube bundle and connected to the annular tube plate 10 of the annular tube box 4, the heat exchange tubes are communicated with the inner cavity 11 of the annular tube box 4, a fluid medium flows into the inner cavity 11 of the annular tube box 4 from the heat exchange tubes 5, the tube box end enclosure 18 is provided with an opening and is connected with one end of a connecting tube 14, and the other end of the connecting tube 14 passes through a shell end enclosure 15 of the reactor 1 and is led out.

Specifically, the inner cylinder 16 is connected to the inner sides of the tube box end enclosure 18 and the annular tube plate 10, respectively, and the outer cylinder 17 is connected to the outer sides of the tube box end enclosure 18 and the annular tube plate 10, respectively, so as to form an inner space of the tube box 4 through the annular tube plate 10, the inner cylinder 16, the tube box end enclosure 18, and the outer cylinder 17, wherein the tube box end enclosure 18 is an annular flat cover end enclosure in this embodiment.

The heat exchange tube comprises a heat exchange tube box, a ring tube plate 10, a plurality of straight tube sections 7 and a plurality of annular tube boxes 4, wherein the straight tube sections 7 in the middle of the heat exchange tube 5 are divided into four groups of tube bundles in the annular direction and are uniformly distributed in the circumferential direction, the ring tube box 4 divides the inner space of the ring tube box 4 into four regions 22 corresponding to the four groups of tube bundles through partition plates 21 perpendicular to the end surfaces of the ring tube plate 10, the ring tube box 4 corresponding to each region is respectively connected with a connecting tube 14, the arrangement mode of the heat exchange tube 5 on the ring tube plate 10 is consistent with the tube arrangement mode of the straight tube sections 7 of the tube bundles 3, specifically, the triangular arrangement mode, the square arrangement mode and the like can be adopted, and the tube arrangement distance on the ring tube plate 10 is smaller than the tube arrangement distance in the middle.

The utility model has the advantages that under the condition of satisfying the process operation, the pipe arrangement distance on the annular pipe plate is smaller than the middle pipe arrangement distance, so that the size of the annular pipe plate can be reduced, and the sufficient space requirement is ensured for installing the filler and the internal parts; the annular channel can adopt an integral annular channel, a partition plate can be adopted between each group of tube bundles to divide the integral annular channel into four groups of channel, and four groups of independent annular channels can also be adopted.

Example 2:

example 2 is substantially the same as example 1 except that: as shown in fig. 4, the channel head 18 is an annular half-tube head.

Example 3:

as shown in fig. 1, a reactor comprises a shell 2, and a central gas distribution pipe 23, an inner catalyst frame 25, a catalyst bed layer 26, a cylindrical gas collector 27 connected with the inner wall of the shell 2, and a tube bundle 3 located in a catalyst area, which are sequentially arranged inside the shell 2 from the center thereof along a radial direction from inside to outside, wherein two ends of the central gas distribution pipe 23 are respectively connected with a gas inlet pipe 24, and two ends of the tube bundle 3 are respectively connected with an annular tube box 4 in embodiment 1 or embodiment 2 or embodiment 3.

Preferably, the vertical radial flow reactor is a vertical radial flow methanol synthesis column.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. An annular tube box suitable for a vertical radial flow reactor, characterized in that: annular channel case (4) set up inside casing (2) of reactor (1), and be located tube bank (3) both ends in casing (2), tube bank (3) both ends are connected on annular tube sheet (10) of annular channel case (4) to inner chamber (11) intercommunication with annular channel case (4), annular channel case (4) and a plurality of takeover (14) one end intercommunication, the other end of takeover (14) passes casing head (15) of reactor (1) and draws forth.

2. The annular tube box for a vertical radial flow reactor according to claim 1, wherein: tube bank (3) include a plurality of heat exchange tube (5), straight tube section (7) in the middle part of heat exchange tube (5) are arranged in order to form the heat exchange tube bank in annular range the cross section center of heat exchange tube bank forms installation space (8), the both ends of heat exchange tube (5) are close to tube bank center (9) to be connected with annular tube sheet (10), fluid medium is by in heat exchange tube (5) flow into inner chamber (11) of annular tube case (4).

3. The annular tube box for a vertical radial flow reactor according to claim 2, wherein: the annular tube box (4) is surrounded by an inner cylinder (16) close to the center (9) of the tube bundle, an outer cylinder (17) far away from the center (9) of the tube bundle, an annular tube plate (10) and a tube box end enclosure (18), and the tube box end enclosure (18) is provided with a hole and is connected with one end of the connecting tube (14).

4. Annular tube box for a vertical radial flow reactor according to claim 3, characterized in that: the inner cylinder (16) is respectively connected with the inner sides of the tube box end enclosure (18) and the annular tube plate (10), the outer cylinder (17) is respectively connected with the outer sides of the tube box end enclosure (18) and the annular tube plate (10), and an inner space of the annular tube box (4) is formed through the annular tube plate (10), the inner cylinder (16), the tube box end enclosure (18) and the outer cylinder (17).

5. Annular tube box suitable for a vertical radial flow reactor according to claim 4, characterized in that: the tube box end enclosure (18) is an annular flat cover end enclosure or an annular semi-tube end enclosure.

6. The annular tube box for a vertical radial flow reactor according to claim 1, wherein: the annular tube box (4) and the shell (2) of the reactor (1) are arranged at intervals, and the tube bundle (3) and the annular tube box (4) can move relative to the shell (2) of the reactor (1) under the action of thermal expansion.

7. Annular tube box suitable for a vertical radial flow reactor according to any of claims 2 to 5, characterized in that: the heat exchange tube is characterized in that the straight tube sections (7) in the middle of the heat exchange tube (5) are divided into four groups of tube bundles in the annular direction and are uniformly distributed in the circumferential direction, the annular tube box (4) divides the inner space of the annular tube box (4) into four areas (22) corresponding to the four groups of tube bundles through partition plates (21) perpendicular to the end faces of the annular tube plates (10), and the annular tube box (4) corresponding to each area is respectively connected with a connecting tube (14).

8. Annular tube box for a vertical radial flow reactor according to claim 7, characterized in that: the arrangement mode of the heat exchange tubes (5) on the annular tube plate (10) is consistent with the tube arrangement mode of the straight tube sections (7) of the tube bundle (3), and the tube arrangement space on the annular tube plate (10) is smaller than the tube arrangement space in the middle.

9. The utility model provides a reactor, includes casing (2) and at inside casing (2) from its center along the central gas distribution pipe (23), interior catalyst frame (25), catalyst bed (26) that radially from inside to outside set gradually, with cylindrical gas collector (27) of casing (2) inner wall connection and be located catalyst regional tube bank (3), central gas distribution pipe (23) both ends link to each other its characterized in that with gas inlet pipe (24) respectively: the tube bundle (3) is connected at both ends to the ring-shaped tube box (4) according to any one of claims 1 to 8, respectively.

Images