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phase boundary area regulation and control model modeling method under an MIHA pure pneumatic operation condition

A technology with purely pneumatic conditions and operating conditions, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of difficult removal of sulfur and limited desulfurization rate.

Active Publication Date: 2019-04-19
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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  • phase boundary area regulation and control model modeling method under an MIHA pure pneumatic operation condition
  • phase boundary area regulation and control model modeling method under an MIHA pure pneumatic operation condition
  • phase boundary area regulation and control model modeling method under an MIHA pure pneumatic operation condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] S100. Analyze the bubble generation process under pure aerodynamic conditions, and establish an energy conversion model in the bubble breaker;

[0090] Before the gas is introduced, the bubble breaker is filled with static reaction solution. When the gas starts to flow in, due to the gas pressure P G and system operating pressure P m There is a pressure difference ΔP between them, the static pressure energy of the gas will be transferred to the liquid, and the liquid will be turbulent, and the pressure of the gas itself will be rapidly reduced to the operating pressure in the MIHA. Due to the flow of the gas-liquid two-phase, the gas-liquid flows out from the bubble breaker. For pneumatic operating conditions, the liquid flow Q L Much smaller than gas flow Q G , the energy required for the operation of the system is almost entirely provided by the gas pressure energy.

[0091] established as figure 1 A simplified diagram of the physical model is shown:

[0092] A...

Embodiment 2

[0165] This example specifically illustrates the phase boundary area control model constructed based on the method of Example 1.

[0166] Based on the modeling method of embodiment 1, the control model of phase boundary area is obtained as follows:

[0167]

[0168]

[0169]

[0170]

[0171] d max =0.75(σ L / ρ L ) 0.6 ε mix -0.4 (89)

[0172] d min =11.4(μ L / ρ L ) 0.75 ε mix -0.25 (90)

[0173]

[0174]

Embodiment 3

[0176] This example is based on the modeling method of Example 1, and studies the operating pressure, operating temperature, supply pressure difference ΔP and ventilation volume Q for the specific reactor structure and reaction system G Influence on the phase boundary area.

[0177] The general calculation conditions are as follows:

[0178] Crusher diameter D 1 =0.02m; The ratio of the diameter of the bubble breaker nozzle to the diameter of the breaker K 1 = 0.5;

[0179] Residue density ρ L =800Kg / m 3 ;

[0180] Residuum interfacial tension σ L The fitting formula is as follows:

[0181] σ L =[31.74-0.04775(T+273.15)]×10 -3 (N / m);

[0182] Kinetic viscosity of residual oil μ L The fitting formula is as follows;

[0183]

[0184] (1) The effect of operating pressure on the phase boundary area a;

[0185] The calculation conditions are as follows:

[0186] Ventilation Q G =80L / h; operating pressure P m =10~20MPa; supply pressure difference ΔP=6MPa; gas temper...

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Abstract

The invention relates to a phase boundary area regulation and control model modeling method under an MIHA pure pneumatic operation condition, and the method comprises the steps: building an energy conversion model in a bubble breaker by analyzing a bubble generation process under the pure pneumatic condition; And based on the energy conversion model and liquid circulation in the bubble breaker, calculating the liquid flow, obtaining the energy dissipation rate and bubble scale of the gas-liquid strong mixing area, and finally obtaining a phase boundary area calculation model. According to themethod disclosed by the invention, a phase boundary area regulation and control model under a pure pneumatic operation condition is established for the MIHA; The influence of the reactor structure, the system physical property, the operation parameters and the input energy on the phase boundary area is comprehensively reflected, the guidance on the design of the reactor and the design of an MIHA reaction system can be realized, and the design of the efficient reactor structure and the reaction system is guided.

Description

technical field [0001] The invention belongs to the technical field of reactors and modeling, and in particular relates to a modeling method of a phase boundary area regulation model under MIHA pure aerodynamic 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 hydrogen sulfide to remove the sulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02T90/00
Inventor 张志炳周政田洪舟王苏李磊张锋
Owner NANJING UNIV
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