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Furnace top heat insulation device for radiant section of cracking furnace

A technology for thermal insulation and cracking furnace, which is applied in cracking, non-catalytic thermal cracking, hydrocarbon oil treatment products, etc. It can solve the problems of difficult complete sealing, the influence of the inlet pipe 102 moving downward freely, and the influence of the service life of the furnace tube, etc.

Active Publication Date: 2019-01-22
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the existing conventional furnace top sealing member 101 is difficult to achieve complete sealing, under the joint action of the incompletely sealed furnace flue gas pipeline and the exposed lower head of the quenching heat exchanger 104, the furnace top is prone to form a local high temperature; and The existing structure is easy to affect the downward free movement of the inlet pipe 102
The local high temperature at the top of the furnace will affect the operation of the staff if it is light, and it will cause adverse effects on the accuracy and stability of related measuring instruments; the restriction of the free movement of the inlet pipe 102 will cause the furnace tube in the radiant furnace to bend and affect the furnace tube. service life

Method used

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  • Furnace top heat insulation device for radiant section of cracking furnace
  • Furnace top heat insulation device for radiant section of cracking furnace
  • Furnace top heat insulation device for radiant section of cracking furnace

Examples

Experimental program
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Effect test

Embodiment 1

[0019] figure 2 A schematic diagram of a thermal insulation device according to an embodiment of the present disclosure.

[0020] In this embodiment, the thermal insulation device of the roof of the radiant section of the cracking furnace according to the present disclosure may include: a radiant coil inlet pipe 202, which is arranged on the roof 207 of the cracking furnace, and one end is connected to the top of the roof 207 of the cracking furnace. Opening, the other end is connected to manifold 203; Radiant coil outlet pipe 208, it is arranged on cracking furnace roof 207, and one end is connected to cracking furnace roof 207 opening, and the other end is connected to quenching heat exchanger 204; Furnace top sealing Component 201, which wraps the inlet pipe 202 of the radiant coil and the outlet pipe 208 of the radiant coil; a box-type thermal insulation member 206, which is arranged outside the sealing member 201 of the furnace top, and is used for the radiant coil The ...

Embodiment 2

[0040] According to an embodiment of the present disclosure, a cracking furnace is provided, and the cracking furnace may adopt the thermal insulation device for the roof of the radiant section of the cracking furnace as described above.

[0041] This embodiment achieves more effective heat insulation by setting box-type thermal insulation components, thereby reducing the heat dissipation loss at the furnace roof of the radiant section and reducing the temperature of the furnace roof of the radiant section; at the same time, it ensures that the inlet pipe can move downward freely, so as to Avoid bending the furnace tube and prolong the service life of the furnace tube.

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Abstract

The invention discloses a furnace roof heat preservation and insulation device for a radiant section of a cracking furnace. The device disclosed by the invention can comprise a radiant coil inlet pipe, a radiant coil outlet pipe, a furnace roof sealing member and a box type heat preservation and insulation member, wherein the radiant coil inlet pipe is arranged on a furnace roof plate of the cracking furnace, one end of the radiant coil inlet pipe is connected to the opening of the furnace roof plate of the cracking furnace, and the other end of the radiant coil inlet pipe is connected to a collection pipe; the radiant coil outlet pipe is arranged on the furnace roof plate of the cracking furnace, one end of the radiant coil outlet pipe is connected to the opening of the furnace roof plate of the cracking furnace, and the other end of the radiant coil outlet pipe is connected to a rapid cooling heat exchanger; the furnace roof sealing member wraps the radiant coil inlet pipe and the radiant coil outlet pipe; the box type heat preservation and insulation member is arranged outside the furnace roof sealing member and is used for performing heat preservation and heat insulation on the radiant coil inlet pipe, the radiant coil outlet pipe and the rapid cooling heat exchanger; the box type heat preservation and insulation member completely covers heat preservation parts of the radiant coil inlet pipe and the radiant coil outlet pipe; and the box type heat preservation and insulation member partially covers a heat dissipation part of the rapid cooling heat exchanger.

Description

technical field [0001] The invention relates to the field of petrochemical industry, and more specifically, relates to a thermal insulation device for the roof of a radiant section of a cracking furnace and a cracking furnace using the thermal insulation device. Background technique [0002] In the field of petrochemical industry, ethylene cracking furnace is an important petrochemical equipment, and its furnace tube, quenching heat exchanger and other parts have been operating under high temperature conditions for a long time. After being preheated in the convection section, the material of the cracking furnace enters the radiant coil in the furnace through the inlet manifold at the top of the furnace; the material enters the quenching heat exchanger after completing the cracking reaction in the radiant coil. [0003] Figure 1A and Figure 1B A cross-sectional view of the structure at the roof of the radiant section of the cracking furnace in the prior art is shown. like...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/18
CPCC10G9/18C10G2400/24
Inventor 何细藕李森刘敬坤
Owner SINOPEC ENG