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Integral installation method of radiation coils for ethylene cracking furnace

A technology of ethylene cracking furnace and radiant coil, which is applied in cracking, non-catalytic thermal cracking, petroleum industry, etc. It can solve the problems of wasted construction time, long welding and assembly time, inconvenient disassembly and installation, etc., and achieves the quality assurance of welding and assembly , The installation workload is small, and the effect of shortening the construction period

Active Publication Date: 2013-11-06
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: a) For a new cracking furnace, before the installation of the radiant coil, the steel structure platform on the upper part of the furnace roof, waste heat boiler (TLE), steam drum, fan and other equipment cannot be installed, which greatly restricts the cracking furnace. Construction progress, wasting valuable construction time
The disadvantage is that since the radiant coils are supplied in bulk, most of the welding and assembly work needs to be completed in the on-site furnace, which takes a long time for welding and assembly
Moreover, the furnace top opening and the vertical opening of the end wall of this device are relatively complicated. Due to the high vertical opening, it is very inconvenient to remove and install these vertical opening seals, requiring a crane and a long time for disassembly and assembly.

Method used

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  • Integral installation method of radiation coils for ethylene cracking furnace
  • Integral installation method of radiation coils for ethylene cracking furnace
  • Integral installation method of radiation coils for ethylene cracking furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This is a newly built pyrolysis furnace, and the height H of the radiant coil 3 is less than the length L of the hearth of the radiant section, so there is enough room for rotation when installing the radiant coil 3:

[0034] Such as Figure 1~2 As shown, before the radiant coil is installed, the following work should be done: a) Install the movable support beam 1 in place on the upper part of the furnace roof 8 of the radiant section, and then connect one end of each set of pulley blocks 2 to the movable support beam 1 , the number of pulley blocks used for hoisting a group of radiant coils is 3 groups; b) open a rectangular opening at the furnace bottom 7 of the radiant section, and the opening is at least the size of an opening for accommodating a group of radiant coils; c) A rectangular opening is opened on the furnace top 8 of the radiant section, and the size of the opening is such that a group of radiant coils are installed; d) the transport vehicle 5 is in place...

Embodiment 2

[0037] This is an established cracking furnace, and the height H of the radiant coil 3 is less than the length L of the hearth of the radiant section, so there is enough space for the rotation of the radiant coil 3:

[0038] Such as Figure 1~2 As shown, before installing the radiant coil, the following work should be done: a) Install the movable support beam 1 in place on the upper part of the furnace roof 8 in the radiant section, and then connect one end of each group of guide chains to the movable support beam 1 , the number of pulley blocks used for hoisting a group of radiant coils is 3 groups; b) dismantling the furnace bottom sealing cover 6; c) disassembling the furnace top sealing cover 9; d) the transport vehicle 5 is in place.

[0039]After the pre-installation work is completed, start to install the radiant coils, the steps are as follows: a) first put a group of radiant coils 3 with the lifting frame 4 on the transport vehicle, and then transport them to the bott...

Embodiment 3

[0041] This is a new pyrolysis furnace, and the height H of the radiant coil 3 is greater than the length L of the furnace in the radiant section, resulting in insufficient rotation space for installing the radiant coil 3:

[0042] Such as Figure 3-4 As shown, before the installation of the radiant coil, in addition to the work before the installation in "Embodiment 1", the following work should be done: open a rectangular opening from the bottom to the end wall 10 of the radiant section, and the opening is At least one opening sized to accommodate a set of radiant coils.

[0043] After the pre-installation work is completed, the installation of the radiant coil is started. The steps are the same as in "Example 1". The rectangular opening that opens also will pass through the rectangular opening that radiation section end wall 10 opens. Finally, after each set of welding and assembly work is completed, in addition to sealing the openings of the furnace bottom and roof with ...

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Abstract

The invention provides an integral installation method of radiation coils for an ethylene cracking furnace, which includes: arranging a rectangular furnace bottom opening and a furnace bottom sealing cover plate at the furnace bottom of a radiation section, or dismantling an existing furnace bottom sealing cover plate, opening the furnace bottom opening; arranging a rectangular furnace top opening and a furnace top sealing cover plate at the furnace top of the radiation section, or dismantling an existing furnace top sealing cover plate and opening the furnace top opening; and integrally hoisting each group of the radiation coils in the radiation section of a furnace body from the furnace bottom opening, firstly taking place temporarily, and then welding and assembling. The integral installation method enables installation of the radiation coils not to mutually influence installation of a steel structure platform on the upper portion of the furnace top, a waste hat boiler, a steam packet, a fan and other devices, is small in site welding workload of furnace tubes, can greatly shortens construction period, and can well guarantee welding and assembling quality of the radiation coils. In addition, the integral installation method has the advantages of being simple in structure, small in installation workload, free of influence on other structures of the furnace body and the like.

Description

technical field [0001] The invention relates to an installation method of a chemical device in the field of petrochemical industry, and more specifically, relates to an overall installation method of a radiant coil used in an ethylene cracking furnace. Background technique [0002] The ethylene cracking furnace is the leading part of the ethylene plant, and the radiant coil is the core component of the ethylene cracking furnace. The cracking reaction takes place in the radiant coil, and the radiant coil is the part with the highest heat and the harshest operating conditions in the ethylene cracking furnace, and its operating temperature reaches above 1100°C. [0003] The installation of radiant coils is closely related to its installation quality, construction progress of the cracking furnace and the complexity of the related cracking furnace structure. At present, the installation process of radiant coil mainly has the following installation methods: [0004] 1. The radia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/20
Inventor 胡鸣刘敬坤何细藕王俭革陈永亮毛耀庭孙向军李光袁慕军郭玉萍高景芬
Owner CHINA PETROCHEMICAL CORP