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Catalytic cracking absorption stabilizing unit optimization processing method based on process simulation software

A process simulation and catalytic cracking technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as high operating costs, economic constraints, and losses outweighed by gains

Active Publication Date: 2014-04-02
SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (2) Constrained by economic factors: the separation process requires more operating costs, and operating costs refer to the cost of providing the various energy sources listed above
The lower the C3+ content in the dry gas is required, the more operating costs are required, but due to diminishing marginal benefits, the gains outweigh the losses

Method used

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  • Catalytic cracking absorption stabilizing unit optimization processing method based on process simulation software
  • Catalytic cracking absorption stabilizing unit optimization processing method based on process simulation software
  • Catalytic cracking absorption stabilizing unit optimization processing method based on process simulation software

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Adjustment of reabsorption tower feed temperature: The reabsorption tower feed of a plant’s absorption stabilization system is a single stream of condensed oil tower top hot feed, the original feed temperature is 68.5°C, and the bottom reboiler uses lean absorption oil and a One medium is used as a heat source, and the excess heat in one medium produces 0.3MPa steam, and circulating water is used for cooling when the steam is excess. After the simulation calculation analysis, the new feed temperature obtained after the optimization solution is 62°C. If the raw feed temperature is too high, after the feed temperature of the desorption tower drops by 7°C, the temperature at the bottom of the tower drops, and the heat load drops, which is effectively reduced.

[0114] The detailed results are as follows:

[0115] Due to the cold feed, the load of the reboiler of the desorption tower increases by 500KW, and the heat load of the feed heat exchanger of the desorption tower d...

Embodiment 2

[0117] Supplementary absorbent dosage adjustment: As a supplement to the optimization of Example 1, the flow of supplementary absorbent was optimized again, and after optimization, the flow increased from 43t / h to 49t / h. The C3 content in the dry gas decreases again. After the implementation, the effect is obvious, and the economic benefit is also increased by about 25￥ / hr.

[0118] The reason is: after the flow rate of the circulating desorbing gas decreases, the total amount of gas and liquid in the absorption tower decreases, and there is room for the independent variable to supplement the absorbent.

[0119] Adding supplementary absorbent can increase the concentration difference of light components in the vapor-liquid two-phase, thereby increasing the mass transfer driving force in the absorption process; the heat load of the reboiler in the stabilization tower has increased, but the RVP requirements for gasoline produced in winter are not high. High, stable column reboi...

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Abstract

The invention relates to the field of petroleum processing computation, in particular to a catalytic cracking absorption stabilizing unit optimization processing method based on process simulation software. Modules involved in the catalytic cracking absorption stabilizing unit optimization processing method based on the process simulation software include a data reading module, a process simulation module, a total benefit computation module, an optimization computation module, a data storage module and a data display module. Compared with the prior art, the method has the advantages that taking overall benefit maximization as an objective and by process simulation computation of a catalytic cracking absorption stabilizing unit, energy needed for completing unit operations is computed and converted into operation cost, a separated product is converted into product value, equipment processing capacity and product quality constraint are converted into constraint conditions, an overall benefit maximization model is established, compiling software is developed to automatically regulate independent operation optimization variables, process simulation is performed, and overall benefit maximization operating parameters meeting current operating conditions and the equipment constraint conditions are sought.

Description

technical field [0001] The invention relates to the field of petroleum processing calculation, in particular to a method for optimizing a catalytic cracking absorption stabilization unit based on flow simulation software. Background technique [0002] Catalytic cracking unit is the main refining unit, which can lighten heavy oil. After the raw oil is subjected to high temperature and pressure, a series of chemical reactions occur under the action of a catalyst, and it is converted into light oil products such as liquefied gas, gasoline, diesel and coke. [0003] The catalytic cracking unit is generally divided into three units: reaction regeneration, fractionation and absorption stabilization. In the absorption stabilization unit, the rich gas and crude gasoline from the catalytic device are separated through rectification and absorption to separate the LPG, dry gas and gasoline components. The energy consumed by the operation of the absorption stabilization unit mainly in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 陶志钢陈宇沈雪松宋国营焦洋朱渝
Owner SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD
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