CN217929966U

CN217929966U - Switching condensing system that phthalic anhydride preparation in-process was used

Info

Publication number: CN217929966U
Application number: CN202221681000.9U
Authority: CN
Inventors: 戴哲彦; 朱振华
Original assignee: Nanjing Zhongshe Petrochemical Engineering Co ltd
Current assignee: Nanjing Zhongshe Petrochemical Engineering Co ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-11-29
Anticipated expiration: 2032-07-01

Abstract

The utility model discloses a switching condensing system that phthalic anhydride preparation in-process was used relates to phthalic anhydride preparation technical field, is convenient for reduce the deposit of the impurity on the switching condenser finned tube, and its technical scheme main points are: including condenser casing, phthalic anhydride house steward, phthalic anhydride shower, the phthalic anhydride house steward stretch into inside by the outside of condenser casing, stretch into inside part and the phthalic anhydride shower intercommunication of condenser casing, the pipe wall lower extreme of phthalic anhydride shower is equipped with a plurality of vertical pipes, each the one end intercommunication that the phthalic anhydride shower was kept away from to vertical pipe has the cavity distribution dish of disc, the terminal surface evenly is equipped with a plurality of shower nozzles under the distribution dish.

Description

Switching condensing system that phthalic anhydride preparation in-process was used

Technical Field

The utility model relates to a phthalic anhydride preparation technical field, more specifically says that it relates to a switching condensing system that phthalic anhydride preparation in-process was used.

Background

At present, the phthalic anhydride industry generally uses a switching condenser to cool gas after reaction so as to achieve the purposes of retaining crude phthalic anhydride and separating redundant air and light components. Switching the operation of the condenser plays a crucial role in the production process.

Chinese patent publication No. CN205821218U discloses a switching condensing system used in the preparation of phthalic anhydride. The system comprises a crude phthalic anhydride intermediate tank, a crude phthalic anhydride spraying pump, a spraying device and a switching condenser, wherein the crude phthalic anhydride intermediate tank is connected with the crude phthalic anhydride spraying pump through a pipeline, the crude phthalic anhydride spraying pump is connected with the spraying device through a pipeline, and the spraying device is arranged above the switching condenser. By adopting the scheme, liquid phthalic anhydride spraying can be carried out on the switching condenser at irregular intervals as required, and impurities deposited on the switching condenser finned tube are effectively controlled.

In addition, chinese patent with publication number CN203479158U also discloses a switching condenser with a spraying system, which comprises a condenser shell, a phthalic anhydride header pipe, phthalic anhydride spraying pipes and a purging gas inlet pipe, wherein the phthalic anhydride header pipe extends into the condenser shell from the outside of the condenser shell, the phthalic anhydride header pipe is positioned on the outside part of the condenser shell and is connected with the purging gas inlet pipe, the part extending into the condenser shell is connected with a plurality of phthalic anhydride spraying pipes, and a spraying distributor is arranged on the pipe wall of each phthalic anhydride spraying pipe. Through set up spraying system in inside, can effectively clear away the impurity at inside dead angle, container wall and finned tube clearance.

The present application thus provides another structure for reducing impurity deposits on the switch condenser finned tube.

Disclosure of Invention

The utility model aims at providing a switching condensing system who uses in phthalic anhydride preparation process, its advantage lies in, is convenient for reduce the deposit of the impurity on the switching condenser finned tube.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a switching condensing system that phthalic anhydride preparation in-process was used, includes condenser casing, phthalic anhydride house steward, phthalic anhydride shower, the phthalic anhydride house steward stretch into inside by the outside of condenser casing, stretch into inside part and the phthalic anhydride shower intercommunication of condenser casing, the pipe wall lower extreme of phthalic anhydride shower is equipped with a plurality of vertical pipes, each the one end intercommunication that the phthalic anhydride shower was kept away from to vertical pipe has the cavity distribution dish of disc, terminal surface evenly is equipped with a plurality of shower nozzles under the distribution dish.

Through adopting above-mentioned technical scheme, the phthalic anhydride house steward imports the phthalic anhydride shower with liquid phthalic anhydride in, and then leads to each vertical intraductal through the phthalic anhydride shower, each vertical pipe with each distribution dish of liquid input in, and then through the shower nozzle blowout, the fin tube inside the switching condenser can many-sided cover to liquid when making spraying by the setting up of a plurality of distribution dishes this moment, reach good clearance effect, the distribution dish has increased the area that sprays, reduce the deposit of the impurity on the switching condenser fin tube.

Preferably: each vertical pipe is detachably connected with the phthalic anhydride spray pipe.

Preferably: the phthalic anhydride spraying pipe is provided with circulation holes communicated with the vertical pipes, the outer wall of the lower end of the phthalic anhydride spraying pipe is provided with an annular connecting pipe at the periphery of the circulation holes, and the vertical pipes are sleeved on the outer wall of the connecting pipe and are in threaded connection with the outer wall of the connecting pipe.

Preferably: the anti-overflow device is characterized in that an annular anti-overflow cylinder with gradually increasing openings is arranged on the circumferential direction of the outer wall of the vertical pipe, after the vertical pipe is in threaded connection with the connecting pipe, the upper end face of the anti-overflow cylinder is abutted to the lower end wall of the phthalic anhydride spray pipe, and a sealing gasket abutted to the lower end face of the phthalic anhydride spray pipe is arranged in the anti-overflow cylinder.

Preferably: each the intercommunication is equipped with a plurality of slope downwardly extending's distribution pipe on the lateral wall of distribution dish, each the distribution pipe distributes along the circumference of distribution dish.

Preferably: the lengths of the vertical pipes are different, and the distribution discs on the lower end faces of the two adjacent vertical pipes are distributed in a vertically staggered manner.

To sum up, the utility model discloses following beneficial effect has: in the phthalic anhydride house steward inputed liquid phthalic anhydride to the phthalic anhydride shower, and then led into each vertical intraductal through the phthalic anhydride shower, each vertical pipe is inputed each distribution dish with liquid in, and then through the shower nozzle blowout, the fin tube that liquid can many-sided cover switching condenser inside when setting up of a plurality of distribution dishes this moment when spraying, reach good clearance effect, the distribution dish has increased the area that sprays, reduces the deposit of the impurity on the switching condenser fin tube.

Drawings

FIG. 1 is a schematic structural view of the present embodiment;

FIG. 2 is a schematic structural diagram of a connecting tube according to the embodiment;

fig. 3 is a schematic structural view for embodying the vertical pipe of the present embodiment.

In the figure: 1. a condenser housing; 11. a phthalic anhydride header pipe; 12. a phthalic anhydride spray pipe; 13. a vertical tube; 14. a distribution tray; 141. a spray head; 15. a flow-through hole; 151. a connecting pipe; 16. an anti-overflow cylinder; 161. a gasket; 17. a distribution pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a switching condensing system that phthalic anhydride preparation in-process was used, as figure 1 and figure 2, including condenser casing 1, phthalic anhydride house steward 11, phthalic anhydride shower 12, phthalic anhydride house steward 11 stretches into inside by condenser casing 1's outside, stretch into inside part of condenser casing 1 and phthalic anhydride shower 12 intercommunication, phthalic anhydride shower 12 one end and phthalic anhydride house steward 11 intercommunication, the other end seals, the pipe wall lower extreme of phthalic anhydride shower 12 is equipped with a plurality of vertical pipes 13, the one end intercommunication that phthalic anhydride shower 12 was kept away from to each vertical pipe 13 has disc-shaped hollow distribution dish 14, terminal surface evenly is equipped with a plurality of shower nozzles 141 under the distribution dish 14. The origin of the phthalic anhydride liquid in the phthalic anhydride header pipe 11 can be input into the phthalic anhydride header pipe 11 from the liquid phthalic anhydride in the phthalic anhydride tank by a phthalic anhydride spray pump, which is not described herein for the prior art. The switch condenser comprises a condenser shell 1 and uniformly arranged finned tubes inside the condenser shell 1.

Like figure 1 and figure 2, phthalic anhydride house steward 11 imports liquid phthalic anhydride in the phthalic anhydride shower 12, and then let in each vertical pipe 13 through phthalic anhydride shower 12, each vertical pipe 13 imports each distribution dish 14 with liquid in, and then spout through shower nozzle 141, the fin tube that a plurality of distribution dishes 14 set up when making liquid when spraying can many-sided cover the switching condenser inside this moment, reach good clearance effect, distribution dish 14 has increased the area that sprays, reduce the deposit of the impurity on the switching condenser fin tube.

As shown in fig. 1 and 2, each of the vertical pipes 13 is detachably connected to the phthalic anhydride shower pipe 12. It is convenient to install the vertical pipe 13 or replace the vertical pipe 13 as needed.

As shown in fig. 1 and 2, the specific mounting and dismounting manner is as follows: the phthalic anhydride shower 12 is provided with circulation holes 15 communicated with the vertical pipes 13, the outer wall of the lower end of the phthalic anhydride shower 12 is provided with an annular connecting pipe 151 at the periphery of the circulation holes 15, and the vertical pipes 13 are sleeved on the outer wall of the connecting pipe 151 and are in threaded connection with the outer wall of the connecting pipe 151. After the vertical pipe 13 is in threaded connection with the outer wall of the connecting pipe 151, the vertical pipe 13 is communicated with the phthalic anhydride spraying pipe 12 through the circulating hole 15. The installation is convenient.

As shown in fig. 1 and 2, an annular anti-overflow cylinder 16 with gradually increasing openings is circumferentially arranged on the outer wall of the vertical pipe 13, after the vertical pipe 13 is in threaded connection with the connecting pipe 151, the upper end surface of the anti-overflow cylinder 16 abuts against the lower end wall of the phthalic anhydride spray pipe 12, and a sealing gasket 161 abutting against the lower end surface of the phthalic anhydride spray pipe 12 is arranged in the anti-overflow cylinder 16. At this time, the opening of the spill-proof cylinder 16 is distributed toward the phthalic anhydride spraying pipe 12, when the user rotates the vertical pipe 13 to connect the vertical pipe 13 with the connecting pipe 151, one end of the connecting pipe 151 enters the vertical pipe 13 to reduce the connection position of the liquid with the connecting pipe 151 through the vertical pipe 13, and in addition, the sealing gasket 161 and the spill-proof cylinder 16 are also abutted against the lower end surface of the phthalic anhydride spraying pipe 12 to further reduce the seepage of the liquid,

as shown in fig. 1 and 2, a plurality of distribution pipes 17 extending obliquely downward are connected to the side wall of each distribution plate 14, and each distribution pipe 17 is distributed along the circumference of the distribution plate 14. The distribution pipe 17 now provides an increased spray area for the liquid from the distribution plate 14 to facilitate flow of liquid onto the switch condenser finned tube.

As shown in fig. 3, the vertical tubes 13 have different lengths, and the distribution discs 14 on the lower end surfaces of two adjacent vertical tubes 13 are distributed in a staggered manner. The purpose of this design is that make the distribution dish 14 dislocation distribution, and then can increase the area of distribution dish 14, and then increase the quantity of shower nozzle 141 and increase the area that sprays, satisfy the operation requirement.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the fan belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a switching condensing system that phthalic anhydride preparation in-process was used, includes condenser casing (1), phthalic anhydride house steward (11), phthalic anhydride shower (12), characterized by: phthalic anhydride house steward (11) stretch into inside by the outside of condenser casing (1), stretch into the inside part of condenser casing (1) and phthalic anhydride shower (12) intercommunication, the pipe wall lower extreme of phthalic anhydride shower (12) is equipped with a plurality of vertical pipes (13), each the one end intercommunication that phthalic anhydride shower (12) were kept away from in vertical pipe (13) has the cavity distribution dish (14) of disc, terminal surface evenly is equipped with a plurality of shower nozzles (141) under distribution dish (14).

2. The switching condensing system of claim 1, wherein the condensing system comprises: each vertical pipe (13) is detachably connected with the phthalic anhydride spraying pipe (12).

3. The switching condensing system of claim 2, wherein said condensing system comprises: the phthalic anhydride spraying pipe (12) is provided with circulation holes (15) communicated with the vertical pipes (13), the outer wall of the lower end of the phthalic anhydride spraying pipe (12) is provided with an annular connecting pipe (151) at the periphery of the circulation holes (15), and the vertical pipes (13) are sleeved on the outer wall of the connecting pipe (151) and are in threaded connection with the outer wall of the connecting pipe (151).

4. The switching condensing system of claim 3, wherein said condensing system comprises: vertical pipe (13) outer wall circumference is equipped with an annular anti-overflow section of thick bamboo (16) that the opening crescent gradually, after vertical pipe (13) and connecting pipe (151) threaded connection, anti-overflow section of thick bamboo (16) up end is contradicted with the lower terminal wall of phthalic anhydride shower (12), and is equipped with sealed pad (161) of contradicting with phthalic anhydride shower (12) lower terminal surface in the anti-overflow section of thick bamboo (16).

5. The switching condensing system for the phthalic anhydride production process according to claim 1, 2 or 3, wherein: each the lateral wall of distribution dish (14) is gone up the intercommunication and is equipped with a plurality of slopes downwardly extending's distribution pipe (17), each distribution pipe (17) distribute along the circumference of distribution dish (14).

6. The switching condensing system of claim 1, wherein said condensing system comprises: the lengths of the vertical pipes (13) are different, and the distribution discs (14) on the lower end faces of the two adjacent vertical pipes (13) are distributed in a staggered manner in the vertical direction.