CN210770946U

CN210770946U - Novel thermal compensation structure for radiation section of reforming furnace

Info

Publication number: CN210770946U
Application number: CN201921674171.7U
Authority: CN
Inventors: 卢志勇; 袁小进; 陈金亮; 钱静怡; 张红; 石勇; 谢东升; 潘珍燕; 张亚新; 顾美芳; 秦小燕; 李勇
Original assignee: Sinopec Engineering Group Co Ltd; Sinopec Nanjing Engineering Co Ltd
Current assignee: Sinopec Engineering Group Co Ltd; Sinopec Nanjing Engineering Co Ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-06-16
Anticipated expiration: 2029-10-09

Abstract

The utility model discloses a novel reformer radiant section thermal compensation structure belongs to metallurgical, chemical industry energy saving and environmental protection technical field. This compensation structure has been reformed transform through the thermal compensation structure to traditional steam reformer top gentle rigid down, and reformer main part thermal compensation structure is that top manifold and bottom distribution pipe all use the rigid support, are connected with the flexible tube between bottom distribution pipe and the boiler tube, and the cold wall pipe segmentation is gathered at the top, and the bellows is connected between the section. The beneficial effects of the utility model are that reduced the relative height of furnace body, improved thermal stability, reduced the local stress of boiler tube top and sub-unit junction, improved the life of whole stove.

Description

Novel thermal compensation structure for radiation section of reforming furnace

Technical Field

The utility model relates to a belong to metallurgical, chemical industry energy saving and environmental protection technical field, a novel reformer radiant section thermal compensation structure is related to.

Background

The traditional steam reformer is a furnace body with a rigid support at the lower part and a flexible compensation elastic support at the top of a pigtail. It has the defects of complex supporting structure, high furnace body, poor stability, easy damage of high-temperature hot-wall pipes at the bottom and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an integral inverted reaction furnace thermal compensation structure, which solves the problems of the prior art that the top thermal compensation and the support are complex, and the bottom high-temperature hot-wall pipe cracks due to the action of thermal stress.

The utility model discloses the technical scheme who adopts:

a novel thermal compensation structure for a radiation section of a reforming furnace is characterized in that reforming furnace tubes are vertically arranged in parallel in a radiation chamber box body in 6 rows, and the reforming furnace tubes penetrate through a bottom plate and a top plate of the radiation chamber box body; the reforming furnace tubes penetrating through the top plate of the box body of the radiation chamber are connected with the cold wall branch tubes through inclined tee joints, two adjacent rows of reforming furnace tubes are connected to the same cold wall branch tube, and the end parts of the cold wall branch tubes are converged into cold wall main tubes;

reforming raw material gas inlet branch main pipes are arranged below the radiation chamber box body, one row of reforming furnace tubes corresponds to one branch main pipe, branches with the same number as that of each row of reforming furnace tubes are arranged on each branch main pipe, and the reforming furnace tubes are connected with the branch main pipes through flexible pipes;

the lower end of the reforming furnace tube penetrating through the bottom plate of the radiation chamber is provided with an elastic hanging bracket, in order to reduce the local stress at the joint of the furnace tube and the cold wall tube and the load of the top of the radiation chamber, the approximately 1/3 gravity load of the furnace tube (containing the catalyst in the tube) is transmitted to the bottom plate of the furnace by the elastic hanging bracket at the bottom of the furnace tube. The cold wall branch pipes are composed of a plurality of sections of cold wall short pipes, the cold wall short pipes are connected with each other by corrugated pipe expansion joints, and the outer sides of the cold wall branch pipes are provided with large pull rods.

The utility model discloses among the technical scheme: the cold wall branch pipe is provided with an expected matched cold wall pipe bracket.

The utility model discloses among the technical scheme: the branch pipe is provided with a feeding pipe bracket.

The utility model discloses among the technical scheme: the multi-section expansion joints of the cold wall branch pipes absorb axial thermal displacement, thereby avoiding the rows of furnace tubes from following translation and improving the sealing property of the top of the hearth. The large pull rod absorbs the pipe internal pressure thrust Fe (Ae) Pi and simultaneously reduces the thrust of the pipe to the supporting beam.

The specially-made flexible pipe at the bottom of the furnace pipe is used for absorbing multidirectional complex combined heat displacement, including downward displacement of about 250mm of the furnace pipe, a small amount of horizontal displacement and horizontal displacement of the feeding pipe. The elastic hanger at the bottom of the furnace tube bears about 1/3 furnace tube load, and the local stress at the joint of the furnace tube and the cold wall tube is reduced.

The utility model has the advantages that:

the beneficial effects of the utility model are that reduced the relative height of furnace body, improved thermal state stability, reduced the local stress of boiler tube with cold wall pipe junction, improved the life of whole stove.

Drawings

FIG. 1 is a top view of a cold wall pipe; FIG. 2 is an elevation view of the furnace tube; FIG. 3 is a top view of the feed tube.

In the figure, 1, a cold wall branch pipe, 2, a cold wall pipe support, 3, a corrugated pipe expansion joint, 4, a large pull rod, 5, a reforming furnace pipe, 6, a flexible pipe, 7, an elastic hanging bracket, 8, a branch main pipe and 9, a feeding pipe support.

Detailed Description

The present invention will be further explained with reference to the following embodiments, but the scope of the present invention is not limited thereto:

a novel thermal compensation structure for a radiation section of a reforming furnace is characterized in that reforming furnace tubes (5) are vertically arranged in parallel in 6 rows in a radiation chamber box body, and the reforming furnace tubes (5) penetrate through a bottom plate and a top plate of the radiation chamber box body; wherein, the reforming furnace tubes (5) which penetrate through the top plate of the box body of the radiation chamber are connected with the cold wall branch pipe (1) through an inclined tee joint, two adjacent rows of reforming furnace tubes (5) are connected to the same cold wall branch pipe (1), and the end parts of the cold wall branch pipes (1) are converged into a cold wall main pipe;

reforming raw material gas inlet branch main pipes (8) are arranged below the radiation chamber box body, one row of reforming furnace pipes (8) corresponds to one branch main pipe (8), branches with the same number as that of each row of reforming furnace pipes (5) are arranged on each branch main pipe (8), and the reforming furnace pipes (5) are connected with the branch main pipes (8) through flexible pipes (6);

the lower end of the reforming furnace tube (5) penetrating through the bottom plate of the radiation chamber is provided with an elastic hanging bracket (7); and the cold wall branch pipe (1) is composed of a plurality of sections of cold wall short pipes which are connected with each other by corrugated pipe expansion joints (3), and the outer side of the cold wall branch pipe is provided with a large pull rod (4).

The cold wall branch pipe (1) is provided with an expected matched cold wall pipe bracket (2).

The branch pipe (8) is provided with a feeding pipe bracket (9).

Claims

1. The utility model provides a novel reformer radiation section thermal compensation structure which characterized in that:

the reforming furnace tubes (5) are vertically arranged in the radiation chamber box body in 6 rows in parallel, and the reforming furnace tubes (5) penetrate through the bottom plate and the top plate of the radiation chamber box body; wherein, the reforming furnace tubes (5) which penetrate through the top plate of the box body of the radiation chamber are connected with the cold wall branch pipe (1) through an inclined tee joint, two adjacent rows of reforming furnace tubes (5) are connected to the same cold wall branch pipe (1), and the end parts of the cold wall branch pipes (1) are converged into a cold wall main pipe;

reforming raw material gas inlet branch main pipes (8) are arranged below the radiation chamber box body, one row of reforming furnace tubes (5) correspond to one branch main pipe (8), branches with the same number as that of each row of reforming furnace tubes (5) are arranged on each branch main pipe (8), and the reforming furnace tubes (5) are connected with the branch main pipes (8) through flexible pipes (6);

2. The novel reformer radiant section thermal compensation structure of claim 1, characterized in that: the cold wall branch pipe (1) is provided with an expected matched cold wall pipe bracket (2).

3. The novel reformer radiant section thermal compensation structure of claim 1, characterized in that: a feeding pipe bracket (9) is arranged on the branch pipe (8).