下降管

目前对下降管内生物质热解机理的研究较少。

Currently , the study on the pyrolysis mechanism of the down tube is insufficiency .

假定下降管式生物质快速热解的动力学方程可用Arrhenius一级反应动力学模型，即公式描述。

It is assumed the dynamics equation of fast pyrolysis of biomass could be described by Arrhenius kinetics model , as the formula in the down tube .

TEXACO气化炉激冷室下降管传热传质过程模拟

Heat & Mass Transfer Research on Descending Pipe of Quench Chamber in Texaco Coal Gasifier

300MW锅炉下降管管座角焊缝的焊接与探伤

Welding and inspection for the fillet weld of 300 MW Boler steam drum

利用PIV技术对陶瓷球颗粒在竖直管内的流动进行测量，为下降管中流动混合过程热交换规律的研究提供理论支持。

Measuring the motion of spherical ceramic particles in a vertical duct by PIV to provide theory for the process of heat exchanging in the down flow tube reactor .

300MW机组锅炉锅筒下降管焊接裂纹的分析和研究

The Analyse and Study into the Cause of Formation of the Welding Crackle for the Downcomer of 300 MW Boiler Steam Drums

反应装置高2.5m，由一个上升管与两个下降管组成，其内径分别为0.47m和0.08m，已接近于中试规模。

The pilot-scale airlift-external-loop reactor was 2.5 m in height with one riser and two downcomers . The riser inner diameter was 0.47 m and the downcomer inner diameters were 8 cm .

消除钢包内衬结渣挂渣、顶渣结壳的现象，以及AHF浸渍罩、RH上升管和下降管结渣上涨的现象。

Such phenomena as slag build up on the inner lining of the ladle , top slag skulling , aggregation of slag on AHF and uplift of the up and down nozzle of RH can be avoided as well by this method .

非牛顿流体在ILAR上升管中的气含率随着黏度的增加变化不大，而下降管中的气含率有所提高。

Also , with increasing viscosity gas holdup in the riser changes slightly and that in the downcomer increases in non-Newtonian fluids .

垂直下降管内汽水两相流截面含汽率

Steam-water two-phase flow void fraction in a vertically downward tube

余热锅炉下降管弯头穿孔事故分析

Analysis on Leakage of Waster Heat Boiler Downcomer Tube Elbow

垂直下降管内油水乳状液流动特性的研究

Experimental investigation of flow characteristics for oil-water emulsions in downward vertical tube

用不同辐射模型研究下降管内传热传质特性

Different Radiative Models for Heat and Mass Transfer Characteristics in Vertical Pipe

锅炉汽包下降管的翻边及其模具设计

Flanging of downcomer on boiler drum and design of the flanging dies

竖直下降管换热实验台改进设计与实验

Improved Design and Experiment of Heat Transfer Platform for a Down-flow Tube

垂直下降管散体颗粒换热实验台设计与应用

Design and Experiment of Downward Vertical Tube for Heat Transfer of Particles

气液两相流倾斜下降管持液率实验研究

An Experimental Study on the Liquid Hold-up of Gas-Liquid Biphasic Tilted Descending Pipelines

锅炉锅筒下降管三通的三维有限元自动剖分

Automatic Generation of Three-Dimension Finite Element Mesh on Boiler Drum and Downcomer Tees

锅炉汽包下降管区域三维有限元应力集中分析

Stress Concentration of Boiler Drum 's Downcomer by Finite Element in Three Dimension

分散下降管汽包的寿命评定

Life Span Evaluation of Boiler Drum with Distributed Downcomers

垂直下降管中高粘液体两相流的流型转变

Flow Pattern Transition for Vertical Downward Two Phase Flow of High Viscosity Liquid

汽包下降管三通三维有限元剖分

3D FEM dissection of boiler drum of downcomer tee

亚临界锅炉集中下降管系统的应力分析

Stress Analysis of Downcomer System for Subcritical Boiler

高压锅筒集中下降管的焊接

Welding of Concentrated Descending Tubes in High-pressure Drums

垂直下降管内油气两相流动截面含气率的测量

Measurement of the Void Fraction in Downward Gas oil Two phase Flow in Vertical Tube

详细考察了气液外环流反应器中上升管、下降管的气泡行为随轴向、径向的变化规律。

This work dealed with the variation of bubble behavior in axial and radial directions .

环流装置的液相流型和下降管中的液相返混

Liquid-phase flow pattern in loop device and liquid-phase local backmixing coefficient in the down-flow pipe

垂直下降管中两相流的流型以及液相粘度对流型的影响

Flow Patterns and Effects of Liquid Viscosity on The Flow Pattern Transitions in Vertical Downward Pipeline

下降管式生物质热解液化装置风网中风机工作点的变化

The working-point variation of the fan of the down flow tube reactor of biomass pyrolysis for bio-oil

倾斜下降管气液两相分层流截面含气率的计算与液层高度的预测

The prediction of liquid layer height and calculation of void fraction on Gas-Liquid Stratified Flow in inclined downward tubes