过量空气系数

二次风的通入，过量空气系数保持在1.1都能降低NOx的产生。

Both to add secondary air and to keep excess air ratio 1.1 can decrease NOx generation .

反应高于700℃，PVC流化床气化生烟量明显减少，过量空气系数0.6时，生烟量减少到PVC质量的10%左右。

When the temperature is 700 ℃ and the excess air ratio is 0.6 , the yield of smoke is decreased to about 10 % .

用CO含量反映化学不完全燃烧损失，从而得出过量空气系数的表达式。

And reflects the q2 with CO , then the paper draw a new expression of exceed air coefficient .

随着过量空气系数的继续增大，NOx排放浓度增长率缓慢；

While oxygen kept on increasing , NOx emission concentration increased slowly ;

结果表明，煤粉N、焦炭N和挥发分N的转化率都随过量空气系数α和温度的增加而增加；

It is found that coal N , volatile N and char N conversion increases as the excess air coefficient and temperature increase .

电控顺序喷射CNG发动机过量空气系数研究

Research of Excess Air Ratio of Sequential Injection CNG Engine

细煤粉粒度、低过量空气系数、湿煤粉以及烟气中较高的CO含量均使氮析出量降低。

Fine pulverized coal , low excess air coefficient , wet pulverized coal and high concentration of CO in the gas could bring the NO concentration down .

随过量空气系数的增加，Cl→HCl的转化率减小。

And the conversion rate of Cl → HCl is decreased as increasing the coefficient of the excess air .

N2O的脱除随一级燃烧区过量空气系数的增大而增大。

The N_2O reduction efficiency increased as the excess air ratio increases in the primary combustion zone .

试验发现，随再燃比的增加和再燃区过量空气系数的减少，CO和N2O的脱除效果增强；过高或过低的一级燃烧区过量空气系数均不利于CO的脱除；

It is found that CO and N_2O reductions increased with increase in the reburn fuel fraction and decrease in the reburn zone excess air ratio .

在沉降炉上考察了较高温下O2／CO2气氛中温度、Ca／S、不同CO2体积浓度、炉内停留时间、过量空气系数、煤种等参量的影响。

The effect of temperature , Ca / S , CO2 volume percent , residual time , excessive air coefficient and coal species on sulfation process was studied under one dimension drop-tube .

对于不同焦煤比的燃料，随着一次风率的增大，N2O排放浓度增高。随过量空气系数增大，N2O的排放浓度增加。

It is shown from experimental results that for all fuel mixtures with the primary air fraction , the excess air coefficient and the Ca / S ratio increasing , N_2O concentration rises .

研究结果表明：在相同负荷下，过量空气系数从1.17（氧量为3%）至1.24（氧量为4%）的过程中，NOx排放浓度增加且增幅较大；

Test results indicated when excessive air coefficient changed from 1.17 ( oxygen 3 % ) to 1.24 ( oxygen 4 % ), NOx emission concentration increased quickly .

通过大量的试验，得出了煤种、煤粉细度、炉膛温度和过量空气系数等因素对NOx排放和煤粉燃烬率的影响趋势；

The results of influence on NOx emission and carbon in fly ash by coal type , coal particle diameter , furnace temperature and excess air are reached through tests .

并在等转速和等过量空气系数条件下，研究了甲醇掺入量对NOx和CO排放影响的规律和原因。

And under the conditions of same engine speed and equal excess air coefficient , the rule and reason for the CO and NOx are studied by the influence of different quantities of methanol .

降低过量空气系数能同时减少N2O和NOx的排放量；且过量空气系数对N2O排放的影响与煤种有关。

Decreasing excess air level can reduce N2O and NOx emissions , but the effects of excess air level on N2O emissions are correlated with coal type .

测定了不同工况下（变污泥水分、床温、过量空气系数）纯烧污泥时SO2、NOx、HCl、Cl2的排放规律以及灰中重金属的排放。

Emmissions of NO_x 、 SO_2 、 Cl_2 、 HCl and some heavy metals in ash under different operating conditions ( such as temperature , sludge moisture and excess air ratio ) were measured .

在工业热态CFB锅炉上测试了过量空气系数和二次风率变化对锅炉飞灰含碳量的影响。

An industrial experiment were conducted to test the influence of excess air coefficient and secondary air ratio on the carbon content of fly ash of CFB boiler burning Fujian anthracite .

研究了氧化性气氛、还原性气氛、温度和过量空气系数对稀硫酸分解生成SO2的转化率的影响，并分析了稀硫酸分解的反应机理。

The reaction mechanism on decomposition of dilute sulphuric acid was analyzed . The effects of oxidizing and reducing conditions , combustion temperature , and excess air on SO2 conversion were obtained .

通过试验和数值模拟，对超细煤粉在一维热态煤粉炉内燃烧时煤粉粒度、炉膛温度、过量空气系数、煤种等因素对NOx释放特性的影响规律进行了研究。

Experimental and numerical simulation study on NO_x release from superfine pulverized coal combustion and the effect factors such as particle size , temperature , stoichiometric ratio , coal sort have been done .

本文就加氢后的汽油机过量空气系数、点火提前角的变化、燃烧过程的循环压力变动、发动机的经济性及HC和CO排放问题进行了研究。

Some changes of the excessive air ratio and ignition advanced timing after adding hydrogen , combustion pressure variation and some problems on economic performance and hydrocarbon and carbon monoxide emission are investigated in this paper .

结果表明在过量空气系数大于1·2的稀燃条件下，应用简化机理对LPG燃烧进行模拟具有较高的精度，完全可以替代详细机理。

The results show that under lean burn conditions , i.e. when excess air ratio is larger than 1.2 , the simulation on combustion in LPG engine with reduced mechanism has reasonably high accuracy .

而稳定工况下，由于双燃料系统可燃混合气过量空气系数的波动较大，连续测量的双燃料系统CO、HC排放波动大于原机。

Furthermore , the fluctuation values of CO and HC of the dual-fuel system at steady condition is greater than that from a gasoline engine because the variation of excess air ratio in a dual-fel system is greater .

对6种不同几何结构烧嘴在不同的燃气流速、过量空气系数、燃气流量以及不同燃气与空气喷口间距下的NOx排放量进行了试验研究。

NO_x emission behavior has been experimentally studied with 6 geometrically differently shaped burner nozzles and different fuel gas velocities , excess air coefficients , gas flow rate and for differently distanced gas and air nozzle .

提高过量空气系数能大幅度的降低CO排放，但却导致NO浓度的增加。过量空气系数对N20没有明显的影响。

Increase the excess air ratio would greatly reduce CO emission , but lead to higher NO concentration , while there is no clear effect on N2O emission .

在ECU严格控制过量空气系数的情况下，使改造后的燃气发动机的动力性、经济性以及排放性等性能参数既满足预定目标，又能使其排放指标达到欧Ⅱ标准。

When the air-fuel ratio of the engine is closed-loop controlled precisely , not only its power and fuel economy reach the target , but also its exhaust emissions meet the EURO ⅱ limits .

通过模拟计算与试验方法，对一维热态煤粉炉内煤粉再燃，再燃区温度、过量空气系数、再燃燃料喷射速度和再燃燃料粒度对NOx还原率的影响规律进行了研究。

The numerical simulation and experimental study on some influence factors such as the temperature and the stoichiometric ratio in rich zone , the velocity and the particle size of reburning fuel on NOx reduction efficient has been done .

小负荷时，由于过量空气系数高，可以采用高达80%的EGR率；高负荷时，采用相对低的约28%的EGR率。

The EGR rate can reach 80 % when the load is lower due to the higher excess air ratio , while the higher load can use the lower EGR rate about 28 % .

对NOx排放的研究主要集中在煤的粒径的不同、过量空气系数的改变、煤种挥发分含量的不同、床温和Ca/S摩尔比的不同所带来的影响。

The research on the release of NO under the test bed focuses on the different size of the coal , the changing of the excess air coefficient , the volatile content difference , the different Ca / S molar ratio and the difference of the bed temperature .

本文利用三维燃烧模型对CNG发动机的燃烧过程进行数值模拟，研究过量空气系数的循环变动对CNG发动机火核形成和发展及燃烧各阶段的影响。

In this paper , three-dimension models have been used to simulate the combustion processes in CNG engine , in order to study the effects of cyclic equivalence ratio variations on flame kernel formation and development .