空气系数

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

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 .

NOx排放浓度随过剩空气系数的增加而增加。

For the fixed excess air , NOx emissions decrease as the secondary air fraction increases .

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 .

NO的排放量随着压力的增高而有明显的降低，在过剩空气系数较低的条件下，压力越高，NO的降低幅度越显著，而N2O则增加。

With the increase of operating pressure , N 2O emission increases , while NO emission can be decreased remarkably .

火焰温度的上升，导致CO2和H2O分子辐射力的加强，也导致NOx的生成先快速上升而后快速下降，并对过剩空气系数、燃料的燃点温度和燃烧速度等产生了影响。

It also has impact on excess air coefficient , temperature , fuel combustion speed and the producing velocity of NO-x rised and then declined .

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 .

采用FLUENT软件对大气式燃气燃烧器的引射器进行数值模拟，得出喷嘴位置与一次空气系数的关系。

The numerical simulation of the injector of atmospheric gas burner is carried out using software FLUENT , and the relationship between nozzle position and primary air coefficient is obtained .

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 .

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 .

燃气火焰中热力型NOx以NO为主，燃烧温度对NO生成起决定作用，空气系数也主要通过改变燃烧温度影响NOx生成。

In gas-fired flame mainly was NO. The burning temperature was the main reason of the production of NO. The air coefficient effected the production of NOx by changing burning temperature .

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 .

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 .

研究表明：高效烟气余热回收、低空气系数、良好的火焰特性使高风温无焰燃烧锅炉的燃料节约率达55%，同时CO2排放可减少55%；

Analysis shows that high efficient heat-recirculation and low air excess ratio and good flame behavior lay out a high heat transfer performance with more than 55 % reduction of fuel savings and CO 2 to the environment .

综述了烟气流过管束、高流速、不同空气系数及不同的SO2体积分数等工况下的冷凝传热特性。

The condensation heat transfer characteristics under conditions of flue gas flowing in tube bundles , high flow velocity , different air coefficients , different volume fraction of SO_2 etc. are summed up .

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 .

实验表明，SO2和NOx排放与炉内温度、Ca／S、脱硫剂细度、煤种、过剩空气系数等有密切关系。

The test results show that the SO 2 and NO x emissions are heavily dependent on such factors as furnace temperature , Ca / S , sorbent particle size , coal type , excess air coefficient , etc.

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 .