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Modeling and optimization methods for wax-oil hydrogen cracking process

A cracking process and hydrocracking technology, applied in design optimization/simulation, CAD numerical modeling, special data processing applications, etc., can solve problems such as being too simple, unable to accurately reflect the operation of production units, and difficult to solve.

Active Publication Date: 2018-06-01
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Hydrocracking also has theoretical research related to lumping. Because the existing lumped models are either too complex and difficult to solve; or too simple to accurately reflect the actual operation of the production unit

Method used

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  • Modeling and optimization methods for wax-oil hydrogen cracking process
  • Modeling and optimization methods for wax-oil hydrogen cracking process
  • Modeling and optimization methods for wax-oil hydrogen cracking process

Examples

Experimental program
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Effect test

Embodiment 1

[0125] 1. Determine the parameters under the specific reaction pressure and hydrogen-oil ratio according to the industrial hydrocracking unit: including design parameters (each bed length, diameter) and operating data (feed flow rate, each bed inlet and outlet temperature, feed and product Relative density and distillation range data, product yield), and according to lump theory, raw materials and products are divided into 6 lumps.

[0126] 2. Determine the hydrocracking reaction kinetic equation, material balance equation and energy balance equation. Using lump theory, considering that the reaction pressure and hydrogen-oil ratio are stable during the reaction process, and the reactant flow rate changes linearly (axially), a hydrocracking lump kinetic model is established, and the rate constant is calculated by the Arrhenius equation , the reactor is approximated as a plug flow reactor, regardless of the radial diffusion of the reactor, the reaction kinetic equation is as fol...

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Abstract

The invention relates to modeling and optimization methods for the wax-oil hydrogen cracking process. The modeling method includes the steps that according to an industrial hydrogen cracking device, design parameters and operating data which are required by modeling are determined, and a hydrogen cracking lumped partition method is determined, wherein the design parameters comprise lengths and diameters of all beds, and the operating data comprises the feeding flow, inlet-and-outlet temperatures of all the beds, the relative density and distillation range data of feeding and a product and theproduct yield; a hydrogen cracking reaction network, a reaction kinetic equation, a material balance equation and an energy balance equation are determined; a hydrogen cracking mechanism model is solved; based on actual industrial operating data, the hydrogen cracking lumped kinetic parameters are corrected. The modeling and optimization methods for the wax-oil hydrogen cracking process are wide in adaptation and can be used for simulating and optimizing hydrogen cracking industrial reactors with different reaction-bed number times and different product yield requirements.

Description

technical field [0001] The invention relates to a modeling and optimization method for wax oil hydrocracking process, which can be used for simulation and operation optimization of industrial hydrocracking process. Background technique [0002] Hydrocracking refers to the process of hydrogenation, cracking and isomerization of heavy oil under the conditions of high temperature, high pressure, hydrogen partial pressure and the presence of hydrocracking catalyst to generate light oil, accompanied by desulfurization, Reaction of impurities such as nitrogen, oxygen and metals. The main features of hydrocracking can be summarized as follows: [0003] (1) Hydrocracking is an important means to mass-produce high-quality middle distillates and adjust oil structure; moreover, it is the only important means that can directly produce low-sulfur, low-aromatic clean fuel oil while lightening; [0004] (2) Hydrocracking does not require pretreatment of raw materials, and can directly pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2111/10
Inventor 钱锋杨明磊范琛钟伟民杜文莉
Owner EAST CHINA UNIV OF SCI & TECH
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