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Control method for accelerating on-line coke burning for industrial pyrolysis furnace

A cracking furnace and industrial technology, which is applied in the field of regulation and control of the online burning process of the cracking furnace in the ethylene plant, and can solve problems such as inability to control the burning process

Inactive Publication Date: 2009-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Since there is no feedback for online analysis of the concentration of carbon dioxide in the charred tail gas, this method only sets the input variables for each variable based on experience, and cannot perform real-time regulation of the charring process according to the actual degree of charring

Method used

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  • Control method for accelerating on-line coke burning for industrial pyrolysis furnace
  • Control method for accelerating on-line coke burning for industrial pyrolysis furnace
  • Control method for accelerating on-line coke burning for industrial pyrolysis furnace

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Embodiment 1

[0045] The method and on-line analysis device of the present invention are used to improve the coking process of cracking furnaces. The industrial cracking furnace is a GK-V cracking furnace. The raw materials for cracking can be naphtha, heavy diesel oil and hydrogenated tail oil, with an annual output of 60,000 tons of ethylene. The original on-line coking procedure of the pyrolysis furnace is 37 steps, and the design time is 22 hours before the 3rd step to the 37th step of the furnace tube scorching in the radiant section. figure 2 As shown, the original burning program is shown in Table 1.

[0046] By using this method of controlling scorching, according to the results of on-site analysis of the online analysis instrument, through manual scorching, and on the premise of ensuring that the analysis parameters are within the safe range, the amount of water vapor and air during scorching are correspondingly increased. The outlet temperature of the furnace tube was increased ...

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Abstract

The invention relates to a method for on-line control of coke burning of an industrial pyrolysis furnace. The method is to perform on-line coke burning in a furnace tube of a radiant section of an ethylene pyrolysis furnace, adopts the concentration amount of carbon dioxide and oxygen to control vapor, air, the outlet temperature of the furnace tube and the coke-burning time, can monitor the coke-burning process of the pyrolysis furnace, can also be used for coke-burning improvement, reduce the coke-burning time of the pyrolysis furnace, and improve the on-line production time of the industrial pyrolysis furnace, thereby improving the annual yield of the industrial pyrolysis furnace.

Description

technical field [0001] The invention relates to an ethylene industrial cracking furnace, and more specifically, to a method for regulating and controlling the on-line coking process of the cracking furnace in an ethylene plant. Background technique [0002] Ethylene cracking furnace is one of the key equipment for ethylene production. The coke generated on the inner wall of the furnace tube in the radiant section of the tube cracking furnace during operation is a poor conductor of heat, which leads to an increase in the temperature of the outer wall of the tube and an increase in the pressure drop, which is the main factor limiting the operating cycle of the cracking furnace. In order to maintain normal production, this layer of coke must be removed, and it takes a period of time to remove this layer of coke. [0003] At present, the coke cleaning in the radiant section of the tubular cracking furnace is carried out in accordance with the on-line coking program provided by ...

Claims

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Application Information

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IPC IPC(8): C07C11/04C07C4/06
Inventor 杜志国王国清张永刚张利军张兆斌
Owner CHINA PETROLEUM & CHEM CORP
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