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Modeling method for reaction rate and conversion rate regulation and control model under MIHA pure pneumatic operation condition

A technology of reaction rate and operating conditions, which is applied in the modeling field of reaction rate and conversion rate regulation model under MIHA pure pneumatic operating conditions, which can solve the problems of difficult removal of sulfur and limited desulfurization rate.

Pending Publication Date: 2020-08-11
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since asphaltene is the macromolecule with the largest relative molecular mass, the most complex structure and the strongest polarity in residual oil, the sulfur in it is difficult to remove, resulting in limited desulfurization rate in the process of residual oil hydrodesulfurization

Method used

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  • Modeling method for reaction rate and conversion rate regulation and control model under MIHA pure pneumatic operation condition
  • Modeling method for reaction rate and conversion rate regulation and control model under MIHA pure pneumatic operation condition
  • Modeling method for reaction rate and conversion rate regulation and control model under MIHA pure pneumatic operation condition

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051]It is generally believed that the basic structural unit of asphaltene is a fused aromatic ring system as the core and incorporates several naphthenic rings, with several alkyl side chains of different sizes on the aromatic ring and naphthenic ring, among which There are various heteroatom groups such as sulfur, oxygen, nitrogen, etc., and metals such as vanadium, nickel, and iron are complexed. The asphaltene molecule is composed of several (generally 4 to 6) structural units (or unit flakes) with the core of the fused aromatic ring system, and the structural units are generally separated by alkyl groups of different lengths. Bridges or sulfur bridges are connected. Microstructure studies have shown that asphaltene is usually a single particle of a semi-ordered graphite unit cell formed by stacking large molecular weight sheet-like condensed aromatic hydrocarbons, and also contains a small amount of metal porphyrin structure through π electrons The interaction of asphal...

Embodiment 2

[0195] This example specifically illustrates the reaction rate and conversion regulation model constructed based on the method in Example 1.

[0196] The modeling method based on embodiment 1 obtains reaction rate and conversion rate control model as follows:

[0197]

[0198]

[0199]

[0200]

[0201]

[0202] d e = d 32 (ρ L g / σ L ) 1 / 2 (15)

[0203] K b =K b0 m o -0.038 (16)

[0204] v G =4Q G / πD 0 2 (17)

[0205] v L =4Q L / πD 0 2 (18)

[0206]

[0207]

[0208]

[0209]

[0210]

[0211]

[0212]

[0213] d max =0.75(σ L / ρ L ) 0.6 ε mix -0.4 (51)

[0214] d min =11.4(μ L / ρ L ) 0.75 ε mix -0.25 (52)

[0215]

Embodiment 3

[0217] Based on the modeling method in Example 1, it can be known that for the asphaltene hydrogenation reaction in the MIRA under pure aerodynamic conditions, the factors that determine the final conversion rate of asphaltene include:

[0218] Reactor structure parameters: Crusher diameter D 1 , Reactor diameter D 0 , Nozzle to crusher diameter ratio K 1 , Reactor height H 0 ;

[0219] Operating parameters: operating pressure P m , operating temperature T, supply air flow Q G ;

[0220] Physical parameters: residual oil density ρ L , residual oil interfacial tension σ L , residual oil dynamic viscosity μ L ;

[0221] Energy parameters: supply pressure difference ΔP;

[0222]Intrinsic reaction rate: k A ;

[0223] In order to optimize the MIHA structure and actual operation, this example is based on the modeling method of Example 1, and studies the operating pressure, operating temperature, supply pressure difference ΔP and ventilation rate Q for the specific react...

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Abstract

The invention relates to a modeling method for a reaction rate and conversion rate regulation and control model under an MIHA pure pneumatic operation condition. The modeling method comprises the steps of: establishing an energy conversion model in a bubble breaker through analyzing a bubble generation process under a pure pneumatic condition; and calculating liquid flow based on an energy conversion model and liquid circulation in the bubble breaker, acquiring an energy dissipation rate and a bubble scale of a gas-liquid intense mixing region, and finally acquiring the reaction rate and conversion rate calculation model. According to the modeling method disclosed by the invention, the reaction rate and conversion rate regulation and control model under the pure pneumatic operation condition is established for MIHA; the reaction rate and conversion rate regulation and control model comprehensively reflects a reactor structure, system physical properties, operation parameters and the influence of input energy on a reaction rate and a conversion rate, can realize the guidance on the reactor design and the MIHA reaction system design, and guides the design of the efficient reactor structure and reaction system.

Description

technical field [0001] The invention belongs to the technical field of reactors and modeling, and in particular relates to a modeling method for regulating and controlling a model of reaction rate and conversion rate under MIHA pure pneumatic operation conditions. Background technique [0002] In consideration of global environmental protection, the sulfur content of marine fuel oil must be reduced, for example, the sulfur content of high seas marine fuel oil must be reduced to 0.5%. Therefore, it is imperative to replace high-sulfur residual fuel oil with low-sulfur distillate fuel oil. Most of the sulfur in crude oil exists in residual oil, and the sulfur in residual oil is mainly distributed in aromatic hydrocarbons, colloids and asphaltenes, and most of the sulfur exists in the form of five-membered ring thiophene and thiophene derivatives. Generally, the C-S bond of the residual oil macromolecule is broken by hydrogenolysis reaction, and the sulfur is converted into hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20
Inventor 张志炳周政田洪舟闫瀚钊李磊张锋
Owner NANJING UNIV
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