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An Optimal Method for Adjusting Production Load of Ethylene Cracking Furnace

A technology of an ethylene cracking furnace and an optimization method, which is applied in the optimization field of production load adjustment of an ethylene cracking furnace, and can solve problems such as the decline of ethylene profitability.

Active Publication Date: 2018-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the continuous increase of large-scale equipment in my country's ethylene industry and the expansion and transformation of equipment, the self-sufficiency rate of domestic ethylene consumption will gradually increase. The profitability of my country's ethylene industry has also dropped significantly

Method used

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  • An Optimal Method for Adjusting Production Load of Ethylene Cracking Furnace
  • An Optimal Method for Adjusting Production Load of Ethylene Cracking Furnace
  • An Optimal Method for Adjusting Production Load of Ethylene Cracking Furnace

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Such as figure 1 As shown, an ethylene cracking furnace with an annual output of 100,000 tons includes a convection section and a radiation section. The radiation section is composed of 48 groups of 2-1 type furnace tubes, which are divided into 6 groups and arranged in the center of the radiation section. 36 bottom burners are evenly distributed on both sides, and 48 side wall burners are evenly distributed on both sides, arranged in two rows.

[0050] Hydrocarbon feedstocks take a hydrogenation tail oil as an example, the feed rate is 41200kg / h, the weight ratio of dilution steam to hydrocarbon feedstock is 0.75, the inlet and outlet temperatures of the furnace tube in the radiant section are 555°C and 812°C respectively, and the inlet and outlet pressures (gauge pressure ) are 0.19Mpa and 0.11Mpa respectively. When the feed rate is adjusted to 80% load, that is, the feed rate is 32960kg / h, the weight ratio of dilution steam to hydrocarbon feedstock is 0.80, the inle...

Embodiment 2

[0054] Such as figure 1 As shown, an ethylene cracking furnace with an annual output of 100,000 tons includes a convection section and a radiation section. The radiation section is composed of 48 groups of 2-1 type furnace tubes, which are divided into 6 groups and arranged in the center of the radiation section. 36 bottom burners are evenly distributed on both sides, and 48 side wall burners are evenly distributed on both sides, arranged in two rows.

[0055] Hydrocarbon feedstocks take a hydrogenation tail oil as an example, the feed rate is 41200kg / h, the weight ratio of dilution steam to hydrocarbon feedstock is 0.75, the inlet and outlet temperatures of the furnace tube in the radiant section are 555°C and 812°C respectively, and the inlet and outlet pressures (gauge pressure ) are 0.19Mpa and 0.11Mpa respectively. When the feed rate is adjusted to 110% load, that is, the feed rate is 45320 kg / h, the weight ratio of dilution steam to hydrocarbon feedstock, the outlet tem...

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Abstract

The present invention discloses an optimization method for adjusting a production load of an ethylene cracking furnace. The method comprises the following steps: step 1: establishing a geometric model of a radiant coil of a cracking furnace to calculate an operating parameter inside the radiant coil of the cracking furnace; step 2: establishing a geometric model of the cracking furnace to acquire an operating parameter outside the radiant coil of the ethylene cracking furnace; step 3: with reference to a calculation result of step 1, iterating a calculation result of step 2, and performing coupling and recalculating; and step 4: when the feeding amount of the cracking furnace ranges from 70% to 120% of a load, adjusting a fuel flow rate to 0.6Q-1.2Q until the calculated operating parameters of the cracking furnace are superior to the operating parameters of the cracking furnace before the load changes. According to the optimization method for adjusting the production load of the ethylene cracking furnace disclosed by the present invention, the production load of the ethylene cracking furnace is adjusted; the optimum heat distribution is provided for the radiant coil of the ethylene cracking furnace, so as to reduce energy consumption of the ethylene cracking furnace; and the optimization method for adjusting the production load of the ethylene cracking furnace is provided according to types and features of materials.

Description

technical field [0001] The invention relates to the field of ethylene cracking furnaces, and more particularly relates to an optimization method for adjusting the production load of an ethylene cracking furnace. Background technique [0002] Ethylene is the basic raw material of petrochemical industry, known as "the mother of petrochemical industry". Ethylene products are directly related to the development of industries such as plastics, rubber, textiles, additives, chemical machinery, construction, transportation and catering. At present, about 98% of ethylene in the world is produced through tubular steam pyrolysis process. Therefore, researchers have always carried out technology development around ethylene cracking furnaces, aiming at improving the yield of low-carbon olefins, reducing energy consumption, reducing costs and adapting to market economy. Work in a changing direction. [0003] In 2012, my country's ethylene production capacity was 16.489 million tons, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 周先锋王国清张利军周丛李蔚张永刚杜志国刘俊杰
Owner CHINA PETROLEUM & CHEM CORP
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