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Long-distance mud pipeline conveying dynamic model and application

A mud pipeline and long-distance technology, applied in the field of hydraulic transportation, can solve the problems of being unable to simulate the slurry state, unable to study the dynamic characteristics of the slurry in the pipeline, and unable to reflect the dynamic characteristics of the slurry.

Inactive Publication Date: 2021-11-19
NAT ENG RES CENT OF DREDGING TECH & EQUIP
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Xiong Ting (2015) established a quasi-static pipeline transportation model, which cannot simulate the state of the slurry in the entire pipeline, nor can it reflect the dynamic characteristics of the slurry
[0004] It can be seen that the theoretical model established by researchers is not perfect enough to study the dynamic characteristics of slurry transportation in the entire pipeline.

Method used

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  • Long-distance mud pipeline conveying dynamic model and application
  • Long-distance mud pipeline conveying dynamic model and application
  • Long-distance mud pipeline conveying dynamic model and application

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Experimental program
Comparison scheme
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Embodiment Construction

[0066] The specific implementation will be disclosed in the paper; the technical solution of this application is patentable.

[0067] Theoretical model:

[0068] Select Fei Xiangjun's formula (1994) as the basic formula, modify it through the measured data, and calculate the pipeline friction I m Calculate; the revised Fei Xiangjun formula is as follows:

[0069]

[0070]

[0071]

[0072] In the formula,

[0073] I m Friction loss for conveying slurry (mH 2 O / m); α is the correction coefficient related to the relative viscosity coefficient of the slurry; V ss is the settling velocity of sediment particles;

[0074] λ is the resistance coefficient along the pipeline when transporting clean water; V is the transport velocity (m / s); g is the acceleration of gravity (m / s 2 ); D is the inner diameter of the pipeline (m); γ m is the bulk density of slurry (t / m 3 ); w is the bulk density of the carrier liquid (t / m 3 ); s is the bulk density of solid (t / m 3 ); m...

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Abstract

The invention discloses a long-distance mud pipeline conveying dynamic model and application. Hydraulic conveying is the main form of silt conveying in dredging engineering. At present, matching of a dredge pump and a pipeline system is mostly quasi-static matching based on performance characteristics of the dredge pump and the pipeline system, the fluctuation of working parameters in the actual conveying process and the influence of dredged object redistribution on the performance characteristics of the whole system are not considered, and certain problems possibly exist for the long-distance high-concentration conveying working condition. Therefore, on the basis of the conveying process of a certain cutter suction dredger on a certain construction site, a large amount of field test data is measured, and a set of complete dynamic conveying theoretical model is established and verified.

Description

technical field [0001] The invention belongs to the field of hydraulic transportation and is applied to dredging projects. Background technique [0002] In dredging engineering, the main form of sediment transportation is hydraulic transportation, especially long-distance pipeline transportation of solid-liquid mixed multiphase flow, and multi-pump systems are often used. Pipeline transportation has a great impact on dredging construction efficiency and construction cost, because pipeline transportation will generate a lot of energy consumption, for example, in the construction of cutter suction dredger, pipeline transportation energy consumption accounts for 80% of the total energy consumption above. An increase in slurry flow rate will result in increased friction and increased energy consumption. Excessively fast slurry flow rate will lead to waste of energy; and too slow slurry flow rate will cause sediment to deposit in the pipeline, causing a series of problems such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06N5/04G06Q50/06G06F113/14
CPCG06F30/28G06N5/04G06Q50/06G06F2113/14
Inventor 王费新周忠玮邢津鲁嘉俊程书凤尹纪富庄海飞刘功勋袁超哲冒小丹洪国军
Owner NAT ENG RES CENT OF DREDGING TECH & EQUIP
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