Method for controlling cracking depth of cracking furnace in ethylene device

A cracking depth and ethylene device technology, applied in the direction of comprehensive factory control, electrical program control, comprehensive factory control, etc., can solve the problems of limited scope of application, and achieve the effects of large changeable range, wide application and improved stability

Inactive Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, due to the fact that the properties of raw materials and process conditions vary greatly within a certain period of time in the case of conventional industrial operations, the scope of application of the soft prediction model established by this method is greatly limited.

Method used

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  • Method for controlling cracking depth of cracking furnace in ethylene device
  • Method for controlling cracking depth of cracking furnace in ethylene device
  • Method for controlling cracking depth of cracking furnace in ethylene device

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Embodiment Construction

[0037] Below in conjunction with embodiment, further illustrate the present invention.

[0038] The method of the present invention is to set up a product yield prediction optimization model respectively for different cracking raw materials, and read the raw material feed rate, dilution steam volume and radiation section outlet temperature (COT) of the raw material properties and cracking furnace through the instrument control system Calculate the current cracking depth and compare it with the control set value to adjust the operating parameters so that the cracking depth is closer to the set value; or according to the physical properties of the raw material, calculate the operating process conditions when optimizing the target product distribution, so that the Operational parameters are adjusted to target values. The operating time and process operation parameters of the cracking furnace can be read in through the instrument control system, and the maximum tube wall temperatu...

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Abstract

The invention relates to a method for controlling cracking depth of a cracking furnace in an ethylene device. The invention discloses an online prediction and optimization control method for cracking depth of an ethylene cracking furnace of a petroleum chemical enterprise. After the technology is adopted, operation process conditions can be adjusted in real time according to the properties of raw materials and the change of an optimization target, so that the device is operated under the optimized process conditions. The method comprises the following steps of: (1) establishing an online yield prediction model of a cracked product, and correcting the established online prediction and optimization control model for cracking depth of multiple cracking raw materials by using industrial operating data to acquire a prediction result; and (2) writing the prediction result into an instrument control system, and adjusting the operation process conditions according to the depth parameter of the cracked product.

Description

technical field [0001] The invention relates to a method for controlling a cracking furnace in an ethylene plant, in particular to a method for controlling the cracking depth of a cracking furnace in an ethylene plant. Background technique [0002] Ethylene plant is the basis of petrochemical production of organic raw materials and the leader of petrochemical industry. Its production scale, output and technology indicate the development level of a country's petrochemical industry. The cracking furnace is the core part of the ethylene plant, the operation of the cracking furnace is very important, it determines the feed amount and composition of other parts of the plant, and any operational fluctuations can lead to increased coking, shortened operating cycles, high energy consumption and maintenance costs Big. In the 1980s and 1990s, all ethylene plants gradually replaced the traditional electric instruments with the distributed control system (DCS), which significantly impr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P90/02C10G9/36C10G9/14C10G2400/20
Inventor 周丛张兆斌杜志国张利军张永刚巴海鹏李蔚陈硕王国清
Owner CHINA PETROLEUM & CHEM CORP
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