The creditable measurement of pulverized coal concentration in primary air is the basis of combustion optimization and safe operation of utility boilers.
一次风煤粉浓度的可靠测量是电站锅炉燃烧优化和安全经济运行的前提条件。
The results illustrate that primary air ratio has a major effect on pulverized coal ignition and minor effects on gas temperature, oxygen concentration and unburned carbon at furnace exit.
结果表明：一次风率对煤粉气流的着火影响较大，而对出口处烟气温度、氧量以及飞灰含碳量影响较小。
Exhaust emission of vehicle engines is one of the primary air pollution sources.
车用内燃机的废气排放是大气污染的主要污染源之一。
The test results show that it is feasible to shorten the length of guide plate in a primary air pipe duct.
结果表明，缩短一次风管道内导流板的长度是可行的。
Pulverized coal concentration in primary air stream has an important effect on ignition and combustion stability.
煤粉浓度对煤粉气流着火及燃烧稳定性的影响较大。
When the primary air blast wave from the explosion strikes the ground another blast wave is produced by reflection.
当爆炸引起的入射冲击波触及地面时，由于波的反射便产生另一冲击波。
The mixing point of primary air and secondary air of burner is a key parameter for the flame stabilization of fuel.
燃烧器一、二次风混合位置是燃烧着火稳燃的关键。
When the primary air blast wave from the explosion strikes the ground, another blast wave is produced by reflection.
当爆炸引起的入射冲击波触及地面时，由于波的反射便产生另一冲击波。
The concentration distribution of pulverized coal in primary air pipe is very important for advancing efficiency of boiler.
掌握煤粉锅炉一次风管中煤粉浓度的分布情况，对提高锅炉效率有很重要的意义。
Common processes of primary air fan-coil system are given in this paper. The disadvantage of winter process is pointed out.
本文给出风机盘管加新风系统冬夏季常用处理过程，指出冬季处理过程确定困难的缺点。
In this paper the selection and optimum of operation of the pressure type cold primary air fan in large boiler were analyzed.
分析了大型锅炉正压冷一次风机选型及运行优化要点，指出煤种和空预器漏风率是影响一次风机选型的主要因素。
In experiment, steady operating point of combustion can be obtained mainly by setting primary air factor and the size of spout.
在实验中，主要通过调整一次空气系数和引射器喷口的大小，达到稳定燃烧的运行工况。
As a high velocity air jet, it supports and straightens the primary air stream and thus prevents slagging on the furnace walls.
作为一股高速射流，它对一次风气流起支撑作用，以防止炉壁结渣现象的发生。
The mixture of coal powder and primary air belongs to typical gas-solid two-phase flow, whose parameter is difficult to detect.
煤粉与一次风的混合物属于典型的气固两相流，其相关参数的检测难度很大。
The distributions of gas temperature, O2, CO2, CO, and NO concentrations were measured under different swirl numbers for the primary air.
测量了在不同的一次风旋流数下，气体的时均温度、O2、CO2、CO和NO浓度的分布。
The reasonable calculation parameters for air-conditioning room are determined with examples, and the energy consumption for the primary air fan-…
结合实例确定出合理的空调室内计算参数，并对风机盘管加新风系统从湿工况改造为干工况进行了能耗分析。
It is shown that both the ignition and the combustion efficiency can be significantly improved and the ratio of primary air can be greatly increased.
试验结果表明，钝体可显著改善劣质煤着火情况和大幅度提高燃烧效率，并可允许大幅度提高一次风率。
Firstly, it briefly analyses the influence of primary air velocity for the combustion safety in boiler and makes the requirement analysis for the system.
本文首先简要的分析了一次风速的大小对锅炉燃烧安全性的影响并对系统做了需求分析；
In comparison with the conventional tangentially fired system, the horizontal bias burner and the twin circles of the primary air are two main improvements.
与传统的切圆燃烧系统相比，水平浓淡燃烧器和同层一次风双向切圆布置是该系统的主要改进之处。
Meanwhile analysis was made on how primary air, concentration of pulverized coal, mill outlet temperature and pulverized coal fineness affected ion ignition.
为此分析了点火过程中一次风速、煤粉浓度、磨煤机出口温度和煤粉细度等对等离子点火的影响。
Using recirculation flow to heat the primary air and increasing the concentration of pulverized coal in primary air really do good to boiler flame stability.
利用回流烟气加热一次风煤粉气流和提高一次风气流的煤粉浓度，都有利于锅炉燃烧的稳定。 开缝钝体燃烧器的设计综合考虑了回流加热和煤粉浓度局部富集。
Stable coal transportation and kiln thermal condition is achieved by increasing primary air rate, improving inventory and modifying screw clearance of the screw pump.
通过采取提高一次风风量、控制合理库存、改造螺旋间隙等措施，达到了稳定煤粉输送量的目的，稳定了窑内热工制度。
In this paper, a new supporting equipment of primary air pipein cooler is introduced , and the design principle, main features and application situation are discussed.
介绍一种新型的冷却机主风管的支撑装置，针对设计原则、主要特点和使用情况进行了讨论。
Based on the experimental result and flame stability theory, the possibility to obtain the optimum parameters of the burners are discussed under different primary air coefficient.
在实验结果的基础上利用火焰稳定理论，论证了在不同一次空气系数时获得最佳燃烧器参数的可能性。
The primary air fan-coil system is a system form that is used widely, whose water system hydraulic optimization is an important mean of advancing design work quality and efficiency.
风机盘管加新风是空调系统中广泛采用的一种空调系统形式。其风机盘管水系统管网水力优化是提高空调系统设计质量和运行效率的重要手段。
Presents the air conditioning design parameters in winter and summer, and explains the division of primary air system for the auditorium in shooting area and its calculation methods.
介绍了该工程冬、夏季空调设计参数及射击区域观众席新风系统的划分和计算方法。
The calculating results denote that:1)The primary air rate is directly increasing with the increasing of fire pot diameter, but the influence of fire path diameter on it is very small;
计算结果显示：1）一次风率随火盆直径增大而单调增加，但受火道直径的影响非常小；
Presents the air conditioning system and smoke exhaust system design of this project, applies the primary air fan coil system and secondary pump water system in the Top Electronics City.
简要介绍了鼎好电子商城空调系统和防排烟系统的设计，商城采用了风机盘管加新风空调系统和二次泵空调水系统。
The effects of the louver structure parameters, the feed concentration and the primary air velocity on the concentrated ratio (RC) were studied by the gas solid two-phase flow experiments.
通过气固两相流实验研究了浓缩比与百叶窗结构，给粉浓度及一次风速的定量关系。
The test shows that size distribution of feeding coal, volatile content and its release as well as the total air rate and primary air ratio will influence the post combustion in CFB boiler.
测试结果表明，影响后燃现象的主要因素是给煤的粒度分布、煤挥发分含量及挥发分析出规律，同时与炉膛内总风量、一二次风量的配比有关。
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