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Ethylene cracking furnace of double-section heat supply structure

A technology of ethylene cracking furnace and furnace wall, which is applied in the direction of non-catalytic thermal cracking, cracking, hydrocarbon cracking and hydrocarbon production, etc., which can solve the unfavorable requirements of energy saving, emission reduction and operation automation, increase the risk of overheating of the outer wall of the furnace, and long-term installation Stable and safe operation and other issues, to eliminate the bottom overheating problem, reduce equipment investment costs and operation and maintenance costs, save the effect of external space

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition to the above-mentioned problems, the traditional heating method also faces other new challenges with the development of large-scale cracking furnaces and the increase in the demand for operation automation: to further increase the height of the furnace while maintaining uniform heat distribution in the direction of the furnace height. The upward flame of the burner must be extended to meet the requirements of heat supply; therefore, affected by the jet entrainment effect of the bottom burner, the probability of the flame turning over and licking the furnace tube is greatly increased, and the problems of local overheating of the furnace tube and shortened operating cycle appear, and the device is long. The stable and safe operation is seriously affected; in addition, the increase in the height of the furnace increases the number of side wall burners, increases the risk of overheating of the outer wall of the furnace, and aggravates the intensity of daily inspection and maintenance work of field operators, which is not conducive to meeting the increasing Strict requirements for energy saving, emission reduction and operation automation

Method used

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  • Ethylene cracking furnace of double-section heat supply structure
  • Ethylene cracking furnace of double-section heat supply structure
  • Ethylene cracking furnace of double-section heat supply structure

Examples

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Embodiment 1

[0066] Such as Figure 4 , 6 , shown in 9, a kind of ethylene cracking furnace of two-stage heating structure, it comprises radiation section 1, convection section 5, radiation coil 4, quenching boiler 6, high-pressure steam drum 7, induced draft fan 8, described quenching boiler 6 Connected to the radiant coil 4, the induced draft fan 8 is connected to the top of the convection section 5, and the high-pressure steam drum 7 is connected to the quench boiler 6, characterized in that:

[0067] The ethylene cracking furnace adopts a two-stage joint heating structure of the upper heating section and the lower heating section in the radiant section 1;

[0068] The heating equipment installed in the upper heating section is the upper burner 3, and the heating equipment installed in the lower heating section is the lower burner 2. Both the upper burner 3 and the lower burner 2 are oriented in the flame direction. The burner at the top of the radiant section 1;

[0069] The side fu...

Embodiment 2

[0084] Such as Figure 5 , 7 , shown in 10, a kind of ethylene cracking furnace of two-stage heating structure, it comprises radiation section 1, convection section 5, radiation coil 4, quenching boiler 6, high-pressure steam drum 7, induced draft fan 8, described quenching boiler 6 Connected to the radiant coil 4, the induced draft fan 8 is connected to the top of the convection section 5, and the high-pressure steam drum 7 is connected to the quench boiler 6, characterized in that:

[0085] The ethylene cracking furnace adopts a two-stage joint heating structure of the upper heating section and the lower heating section in the radiant section 1;

[0086] The heating equipment installed in the upper heating section is the upper burner 3, and the heating equipment installed in the lower heating section is the lower burner 2. Both the upper burner 3 and the lower burner 2 are oriented in the flame direction. The burner at the top of the radiant section 1;

[0087] The side f...

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Abstract

The invention provides an ethylene cracking furnace of a double-section heat supply structure. The ethylene cracking furnace comprises a radiation section (1), a convection section (5), a radiation coiled tube (4), a quenching boiler (6), a high-pressure steam pocket (7) and a draft fan (8), wherein the quenching boiler (6) is connected with the radiation coiled tube (4); the draft fan (8) is connected with the top of the convection section (5); and the high-pressure steam pocket (7) is connected with the quenching boiler (6). The ethylene cracking furnace is of the double-section combined heat supply structure that the radiation section (1) is internally provided with an upper heat supply section and a lower heat supply section. By adopting the ethylene cracking furnace of the double-section heat supply structure, the arrangement of a combustor and the design of a combustion tube line arrangement are simplified, the flame inside a hearth is prevented from coiling to touch furnace tubes, interference of flame is also prevented, uniform distribution of heat in the height direction inside the hearth in the radiation section is maintained, and meanwhile the emission of NOx is reduced.

Description

technical field [0001] The invention relates to a cracking furnace suitable for producing ethylene by steam cracking of petroleum hydrocarbons. Specifically, the invention relates to an ethylene cracking furnace with a double-stage heating structure. Background technique [0002] For the cracking furnace for ethylene production by steam cracking of petroleum hydrocarbons, the cracking reaction in the furnace tube of the radiant section is a strong endothermic cracking reaction, and the heat required for the reaction is supplied by the fuel consumed by the heating equipment (burner) in the furnace. According to the position installed in the furnace of the cracking furnace, the burner is divided into two types: bottom burner and side wall burner, so the heating mode of the cracking furnace is divided into three types: full bottom burner heating, full side wall burner Combined heat supply and bottom sidewall heating. [0003] The heat supply method of all side wall burners was...

Claims

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Application Information

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IPC IPC(8): C10G9/20C07C11/04C07C4/04
CPCC07C4/04C10G9/206C07C11/04
Inventor 何细藕李进锋李昌力邵晨申海女赵永华侯瑞王海靖
Owner CHINA PETROLEUM & CHEM CORP
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