Novel configured single-stroke furnace tube ethylene cracking furnace

An ethylene cracking furnace and furnace tube technology are applied in the field of cracking furnaces for cracking petroleum hydrocarbons to produce olefins, and can solve the problems of poor selectivity, fast coking speed, and poor thermal stress absorption of single-pass furnace tubes of type 1-1 two-pass furnace tubes.

Active Publication Date: 2007-10-31
CHINA PETROLEUM & CHEM CORP +2
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the disadvantages of fast coking speed of one-pass equal-diameter furnace tubes, poor selectivity of 1-1 type two-pass furnace tubes, and poor thermal stress absorption of single-pass furnace tubes, and retain their respective advantages, the invention provides a new exhaust The single-pass furnace tube ethylene cracking furnace is used to improve the process performance of the cracking furnace through the single-pass reduced-diameter furnace tube; the thermal stress condition of the furnace tube after heating is improved through the bent pipe section in the middle of the reduced-diameter furnace tube and the curved connector before the furnace tube inlet section , avoiding furnace tube bending

Method used

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  • Novel configured single-stroke furnace tube ethylene cracking furnace
  • Novel configured single-stroke furnace tube ethylene cracking furnace
  • Novel configured single-stroke furnace tube ethylene cracking furnace

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Embodiment Construction

[0111] The present invention is further described below in conjunction with embodiment. The scope of the present invention is not limited by these examples, and the scope of the present invention is set forth in the claims.

[0112] A new type of ethylene cracking furnace with single-pass furnace tube arrangement, the ethylene cracking furnace includes: a high-pressure steam drum 1, a convection section 2, a radiation section furnace tube 3, a burner 4, a radiation section 5, and a quench boiler 6;

[0113] Each of the furnace tubes 3 in the radiant section is a single-pass vertical variable-diameter furnace tube, and the inner diameter of the upper end of the furnace tube is larger than the inner diameter of the lower end of the inlet tube; that is, the furnace tube is a variable-diameter furnace tube.

[0114] 24 furnace tubes in the radiant section are connected to a manifold 10 to form a furnace tube bundle; the manifold 10 is arranged outside the furnace; the cracking fur...

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Abstract

The invention discloses a new type configuration single-pass furnace tube ethylene cracking furnace, which comprises the following steps: comprising high pressure steam drum, convection section, radiant section furnace tube, combustor, radiant section and chill boiler; setting the inner diameter of discharge pipe port of one-pass reducing vertical furnace tube bigger than the inner diameter of feed pipe inlet; assembling a bend in the middle of the furnace pipe; arranging an angle head in collecting tube; connecting a plurality of furnace tubes to a collecting tube; getting a nest of boiler tube. This invention can be used to ethylene installation.

Description

technical field [0001] The invention relates to a cracking furnace, in particular to a cracking furnace for producing olefins by cracking petroleum hydrocarbons. Background technique [0002] In the ethylene plant, the cracking furnace is the core equipment (see Figure 1). In order to shorten the residence time of the cracking reaction as much as possible and increase the cracking depth at the same time, the radiant coil (furnace tube) of the cracking furnace is developed in the direction of short length and small diameter. The double-pass coil is widely used, and the single-pass radiant tube has been used. in industrial devices. [0003] The design of the radiant coil is the key to determine the cracking selectivity, improve the yield of cracked olefins and improve the adaptability to different cracking raw materials. Improving the structure of the radiant coil has become the core part of the technical development of the tubular cracking furnace. For more than 20 years, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/04C07C4/02
Inventor 何细藕李昌力陈硕张利军邵晨许士兴孙向军巴海鹏郭玉萍李光
Owner CHINA PETROLEUM & CHEM CORP
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