循环比

考察了循环比压力、反应温度及不同H2/CO比对反应的影响。

The effect of recycle ratio , pressure , reaction temperature and various H_2 / CO ratio to the reaction is investigated .

而C2烃选择性在循环比为0.625时最高。

While the highest C2 selectivity was reached at recycle ratio of 0.625 .

脚部的循环比手部的循环缓慢得多。

Circulation is much more sluggish in the feet than in the hands .

通过理论分析，得出了机组热经济性指标涉及的两个重要参量比内功N和循环比吸热量Q的统一表达式。

Through theory analyses , and reached the unified expression of specific internal work equation N and cycle heat absorption equation Q and they are two important references that involve in the thermal economic nature calculation of unit .

研究结果表明，正确地选择混合工质，在相同的压比下，可使LHR循环比基本循环具有更高的热力学效率，而采用ACR循环可以较LHR循环更进一步提高循环的热力学效率。

The conclusion is that if an appropriate refrigerant mixture is used , the LHR cycle can have a relatively higher thermodynamic efficiency than that of basic cycle , in case their pressure ratios are the same .

测试了从1到3的3个循环比条件下的出水情况，在不同的测试条件下整个过程的平均表现为：TOC去除81-91%，TKN去除85-91%。

Three recycle to influent ratios from 1 to 3 were tested . Average performance of the overall process , in the different conditions tested , were a TOC removal of 81 to 91 % and 85 to 91 % of TKN .

延迟焦化传统流程与可调循环比流程的工艺比较

Comparison of conventional and tunable recycle ratio process for delayed coking plant

可调循环比的延迟焦化工艺

Delayed coking process with a regulating circulation ratio

对洱海沉积物中铁、锰的分布特征进行了分析，说明洱海沉积物中铁的循环比锰微弱的多，铁氧化物的还原作用受到了溶解氧和锰氧化物的双重控制。

At the sediment of Erhai Lake , Mn-cycle is more apparent than Fe-cycle .

比大循环比操作更有效的降低蜡油收率的延迟焦化技术

Delayed coking technology to reduce CGO yield more effectively than large circulation ratio operation

氧化沟的循环比探讨

Discussion of Circulation Ratio of Oxidation Ditch

通过计算，得出了在不同的循环比下停留时间分布的计算结果。

The results of the residence time distribution at various cycle ratio have been obtained .

当循环比β介于0到∞之间时，适用于某些特殊反应过程。

Between 0 to ∞, the recycle ratio can be applied in some special reactions .

进水水质对氧化沟水流混合程度的要求不一样，影响氧化沟循环比。

Influent quality has an effect on circulation ratio because of the difference of mixing level requested .

在提高氧化沟循环比的同时，应使氧化沟在一定程度上保留推流式反应器的特点。

Oxidation ditch should keep the feature of PF reactor to an extent as increasing circulation ratio .

为此，对反应温度、反应压力、循环比进行了调整。

To resolve these problems , technicians adjusted the reaction temperature , reaction pressure and circulation ratio .

通过生产操作实践证明，可调循环比工艺流程提高了延迟焦化装置操作的灵活性。

Operation practice shows that the operation flexibility of delayed coker has been improved by adopting the process flow with a regulating circulation ratio .

研究了不同宽度的隔板式环流反应器中的气含率，循环比和体积传递系数。

The gas hold-up , circulation ratio and the volumetric transfer coefficient of liquid in reactor with a separate plate of different sizes were investigated .

结果表明，可调循环比工艺流程液收高，焦碳产率低，操作灵活，适应性强。

The adjustable recirculating ratio process flow has the advantages of high fluid yield , low coke rate of production , flexible operation and strong adaptability .

sd/st值对液体循环比影响较大，当sd/st值减小时，液体循环速度明显增加。

The value of s_d / s_t greatly affect the ratio of liquid circulation , when s_d / st , decreases , the velocity of circulating liquid increases obviously .

结果表明循环比为1.25时，甲烷的转化率较好，继续增大循环比后，转化率有所下降。

The results showed that the methane conversion could achieve maximum at the recycle ratio of 1.25 . The methane conversion would be decreased when increased recycle ratio continually .

氧化沟循环比的大小对氧化沟断面大小有很大影响。氧化沟循环比主要取决于曝气充氧的需要和进水水质，曝气充氧对循环比的要求可通过计算确定；

Circulation ratio of oxidation ditch has an important effect on the size of section in oxidation ditch , and it mainly depends on oxygen demand and influent quality .

该方案首次采用了可灵活调节循环比的工艺流程，使循环比可以低于0.2，甚至可以实现零循环比操作；

Process flow with an adjustable recycle ratio was first adopted and the recycle ratio has been decreased to below 0.2 , even the zero recycle ratio operation can be realized .

对湿空气出口温度和废气循环比进行优化设计，比无废气循环的常规设计节省年总费用20.8%，比循环比为0.2时的常规设计节省年总费用14.3%。

The annual total cost of optimum design decreased by 20.8 % than that of conventional design without EGR , 14.3 % than that of conventional design when exhaust gas recirculation ratio was 0.2 .

计算结果表明：钍铀平衡循环比铀钚平衡循环每天节省裂变核素质量约18.4%，并减少了长寿命放射性核废料的产生。

The calculation results show that total fissile nuclides ' consumption of every day of the equilibrium thorium-uranium cycle is decreased by 18.4 % than that of the equilibrium uranium-plutonium cycle , and long-life radioactive nuclear waste is reduced .

降低延迟焦化工艺过程的操作压力和循环比，可以降低焦炭产率，最大程度的产出焦化轻油，同时最大量生产焦化蜡油以供催化裂化装置作原料。

Reducing the operating pressure and circulation ratio of Delayed coking unit will decrease the coke yield , maximum output of coking light oil , while the maximum production of coker gas oil as raw materials for catalytic cracking unit .

此外，如果继续增大缺氧区与好氧区容积比，应适当调整内循环比，否则会由于缺氧区硝酸盐浓度不够而发生二次释磷现象。

Therefore , when the volume ratios of anoxic zone to aerobic zone continue to be increased , internal recirculation ratio shall be adjusted , otherwise the nitrate concentration will not be enough in anoxic zone and phosphorus will be released again .

介绍了超滤装置工艺原理，论述了模组件截留分子量对油剂回收率的影响，循环比与滤液流量的关系，循环料液浓度与滤液浓度关系；操作压力、温度变化对滤液流量的影响。

The method and priciple of super-filtration process , relation between cycle ratio and filter rate , the relation between concentration of cycle liquid and that of filtrate , the amount of filter affected by the operation pressure and the change of temperature are discussed .

结果表明，处理量提高了25%，循环比由原来0.60降为0.53，渣油中360℃以下馏分质量分数由原来的15%降低到7%以下；

And the gas oil stripper is installed . The results show that the production is increased by 25 % . recycle ratio is reduced from original 0.60 to 0.53.the residue-oil fraction below 360 ℃ is reduced from 15 % to less than 7 % .

通过技术改造，循环比降低0.12，焦化装置处理量扩大，产物分布得到改善、液收增加2.10%，炉管烧焦周期延长1倍，另外综合能耗也有很大程度的降低。

The technique innovation has resulted in recycle ratio reduction of 0.12 , enlargement of the coking unit capacity , improvement of product distribution , liquid product increment of 2.10 % , furnace pipe coking period prolongation of 1 multiple and large reduction of synthetic energy consumption .