热量衡算

Described the design of supercritical fluid extraction principles; combination of star anise essential oil of the nature of the proposed extraction conditions for extracting pressure 15MPa, extraction temperature 40 ℃, CO2 flow rate 830 ~ 850L / h, extraction time of 2h, the extraction conditions selected temperature swing separation, further development of the star anise crushed, CO2 super-critical phase transition, extraction, separation and packaging processes; in determining the production process on the basis of material balance, heat balance, extractor size calculation, piping calculation and packaging process is calculated; for the pollution occurred during the production, analysis of pollution sources, pollution control and waste treatment proposed measures; accounting of production costs and value.

本设计阐述了超临界流体萃取技术的原理；结合八角精油的性质，提出萃取条件为萃取压力15MPa，萃取温度40℃，CO2流量830～850L/h，萃取时间2h，根据萃取条件选用变温变压的分离方式，进一步制定了八角粉碎、CO2超临界相变、萃取、分离和包装等工序；在确定的生产工艺流程的基础上进行物料衡算、热量衡算、萃取釜尺寸计算、管路计算和包装工序计算；针对生产过程中出现的污染，分析污染的来源，提出控制污染和废料处理的措施；核算生产的成本和价值。

According to the analysis of the complex physics property of urea synthesis system, the enthalpies model is proposed to predict the behavior of the thermal balance of Urea synthesis reactor.

针对尿素反应过程模拟与计算中涉及到的热量衡算，在水溶液全循环法的尿素工艺流程条件下，对常用的扩展的UNIQUAC方程、PHS状态方程以及经验公式的焓值计算方法进行了对比研究，确定了尿素合成过程的焓值计算方法。

According to the result of energy balance,the temperature field of water jacket was simulated.

根据热量衡算的结果对水夹套结构整体温度场的分布进行了模拟，并通过有限元计算模型进行了结构的应力分析和强度计算。

The heat balance of technological process for distill citrals out from litsea cubeba oil has been developed, which shows that the consumptions of the rectifying energy were relatively small.

对山苍子油蒸馏提取柠檬醛的工艺过程进行热量衡算，给出了原料和能量消耗计算结果。

The unstationary heterogeneous model, consisted of a set of partial differential equations, was obtained by mass and heat balances of both gas and solid phases in large scale reactors with a series of simplication supposition.

首先，以工业反应器为建模对象，在一系列基本假设的支撑下，通过反应器微元内两相的质量衡算和热量衡算，得到由偏微分方程组构成的、流向变换强制周期操作二氧化硫催化氧化反应器的非定态非均相模型。

The parameters of conventional design of complex cross-feed and parallel-feed multi-evaporation conventional design could be obtained by solving material balance, energy balance, solid-liquid equilibrium, vapor-liquid equilibrium and heat transfer velocity equations by iterative method and matrix method.

用迭代法结合矩阵法求解系统的物料衡算及热量衡算矩阵方程、固液相平衡方程、汽液相平衡方程和传热速率方程，可以得到复杂错流、平流多效蒸发系统常规设计的各种参数。

Feasibility of the process was investigated by calculating material balance and heat balance.

通过物料衡算和热量衡算，对连续悬浮结晶工艺的可行性进行了分析。

A heat balance gives the temperature of solids at any time .

从热量衡算可以得到固体颗粒任何时候的温度。

The "oil-burning into coal-burning project" in the drying system of a 600 kt/a DAP facility at Wengfu Phosphate Plant is summarized on its controlling indices and process. By heat balance,a heat charge of 3.03×107 kJ/h is needed and a GXDF-8 fluidized-bed furnace is employed with the heat capacity of 3.36×107 kJ/h.

对贵州瓮福磷肥厂600 kt/a磷铵装置烘干系统由燃油改燃煤的工程进行总结：干燥系统的控制指标；燃煤系统的工艺流程；通过供热系统的热量衡算计算出需供热量3.03×107 kJ/h，选定GXDF-8型沸腾炉(3.36×107 kJ/h)；&油改煤&工程的试车及整改情况。

The technological design computation uses the Aspen plus software , according to parameters and so on absorption system's system nature, is absorbed component separation purity, operating condition, carries on the material balance, the thermal graduated arm to the endoergic process to calculate, the mass transfer computation and so on, determined needs the padding level altitude, and carries on the optimized analysis and the computation.

工艺设计计算利用Aspen plus软件，根据吸收系统的物系性质、被吸收组分分离纯度、操作条件等参数，对吸收过程进行物料衡算、热量衡算，传质计算等，确定所需填料层高度，并进行优化分析与计算。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷