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Delayed coking absorption stability optimization system based on equation-oriented method

A technology of delayed coking and absorption stabilization, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as temperature, unreasonable amount of lean oil absorbed, unknown composition of rich gas raw materials, and reduced liquefied gas production, etc. Achieve the effect of meeting real-time optimization requirements, fast calculation speed, and simple use and maintenance

Active Publication Date: 2018-04-20
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology

For a long time, the absorption and stabilization system has the following long-term problems: 1. The dry gas is not dry. Due to insufficient absorption, the entrained part of C3 and above components in the dry gas makes the propylene contained therein used as fuel gas, and the output of liquefied gas 2 Supplementary absorption amount, temperature at the bottom of the desorption tower, lean oil absorption and other parameters are in an unreasonable range
In addition, since the composition of the gas-rich feedstock is unknown, the calculation is more difficult

Method used

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  • Delayed coking absorption stability optimization system based on equation-oriented method
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  • Delayed coking absorption stability optimization system based on equation-oriented method

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[0159] figure 2 It is the process flow of the delayed coker absorption stabilization system of the embodiment of the present invention. The rich gas from the top of the fractionation tower is compressed by the compressor (K201) to 1.6~1.7Mpa, the compressed rich gas is mixed with the bottom oil of the absorption tower (C301) and the top gas of the desorption tower (C302), and then cooled to room temperature After cooling, it enters the oil-gas separator to separate the rich gas and condensed oil. The rich gas enters the absorption tower, and the condensed oil enters the desorption tower.

[0160] The operating pressure of the absorption tower is 1.4MPa, and the average absorption temperature is about 45°C. The rich gas enters from the lower part of the absorption tower, and the crude gasoline from the top of the fractionating tower and the supplementary absorbent from the stabilizing tower are fed from the top, and are in reverse contact with the rich gas The light hydrocar...

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Abstract

The invention provides a delayed coking absorption stability optimization system based on an equation-oriented method. The system comprises a data acquisition module for collecting production processdata and laboratory analysis data and a calculation module which is connected to an output end of the data acquisition module, is formed by a harmonic calculation module and an economic optimization calculation module and outputs an optimization result. A simulation model of a strict mechanism model is established according to an actual delayed coking process, a data output end of the simulation model is connected to data input ends of a harmonic model of a harmonic target function established by using an EO method and an economic optimization model of an optimization target function established by using the EO method, a data input end and a data output end of the calculation module are connected to process simulation software, and a harmonic sub model and an economic optimization sub model are called through the process simulation software. The real-time calculation and optimization can be realized, the system has the advantage of a fast calculation speed, real-time optimization requirements are satisfied, material balance and energy balance are satisfied, and the system is simple to use and maintain by a web application program.

Description

technical field [0001] The invention relates to a delayed coking absorption stability optimization method, in particular to an equation-oriented method-based delayed coking absorption stability optimization system. Background technique [0002] Delayed coking is a thermal cracking process whose main purpose is to convert high-carbon residues into light oils. Delayed coking raw materials can be heavy oil, residual oil, or even asphalt, and delayed coking products are divided into gas, gasoline, diesel oil, wax oil and coke. Coked gasoline and coked diesel are the main products of delayed coking. Delayed coking units are generally divided into three systems: delayed coking, fractionation and absorption stabilization. Among them, the absorption stabilization system uses absorption and rectification methods to separate the rich gas and naphtha in the oil-gas separator at the top of the fractionation tower into dry gas (C1, C2), liquefied gas LPG (C3, C4) and stable gasoline. ...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 吕建新陈玉石佟伟彭伟锋王立新石培华金炜王建平闫雨
Owner CHINA PETROLEUM & CHEM CORP
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