Alkali recovery is an effective way dealing with the black - liquor in pulp mill . black - liquor evaporation and combustion in , alkali recovery are complicated industrial processes . they have characteristics such as strong coupling , non - linearity , large time delay , parameter examining difficulty , etc . and people require more effective control system for the processes " 碱回收是纸厂处理黑液的有效方法，造纸碱回收过程中的燃烧和蒸发工段是复杂的工业过程，具有复杂性、非线性、大时滞和参数检测困难等特点，而且人们对于控制系统的控制性能也提出越来越高的要求，常规控制技术已经没有办法满足生产的需要。
By the adoption of a colunm with highly effective bubblecapplates and float valves and the strict control of demineralized water consumption , the total amount of dilute aqua ammonia from the three sections of earbonation , final purification and synthesis is less than the quantity of dilute aqua ammonia required for the production of ammonium bicarbonate , with zero discharge of the dilute aqua ammonia , thus not only prolecting the environment but also realizing a cestain economic benefit 通过采用高效泡罩板塔、浮阀塔，严格控制软水用量，使碳化、精炼、合成3个工段所产生的稀氨水总量小于生产碳酸氢铵所需的稀氨水量，达到稀氨水的零排放，不仅保护了环境，而且取得了一定的经济效益。
The data monitoring system in slim steel section based upon embedded - linux has been developed in such a way that reflects how to develop an embedded - linux controller . the system is offered as an instance as well as outcome , and it is practical . so , we show the developing procedure as following 作为实例和本文成果之一的基于嵌入式linux和web技术的“钢厂薄板工段数据监视系统” ，其开发过程基本上反映了嵌入式linux控制器的开发特点，并证明了该研究设想的可行性，具有一定实用性。
Solid materials handling and pneumatic conveying system packaged machinery and its equipment and valves are mainly used for conveying , material unloading , dedusting , metering , mixing , packing units in the processing units of the solid materials including powder , particles , powder mixtures and flakes of abs , ps , pe , pp , pom , san , pet , pc , pta , pvc , bpa , sap , as and pmma in the trades of petroleum , chemical industries , chemical fiber , dye , pharmacy , food , electronic , paper making , natural gas , power , environmental protection , metallurgy and etc . . it is applicable for various pneumatic conveying systems and gravity flow conveying systems under the conditions of diluted - phase , densed - phase , high pressure , low pressure and vacuum pressure 固体物料处理和输送系统成套机械及其专用设备、阀门主要应用于石油、化工、化纤、染料、医药、食品、电子、造纸、天然气、电力、环保、冶金等领域中固体物料(含abs 、 ps 、 pe 、 pp 、 pom 、 san 、 pet 、 pc 、 pta 、 pvc 、 bpa 、 sap等粉沫、颗粒物料、粉粒混合物、片状)生产加工过程中输送、卸料、除尘、计量、混合、包装等工段使用，能适用于稀相、密相、高压、低压、负压各种气力输送系统和重力流输送系统。
According to the control request of two key sectors of the whole system , generalized predictive control ( gpc ) and fuzzy control are respectively adopted to be theoretically studied and actually applied . multi - grades distributive process control system is built to realize integrated automation 针对人造板厂中密度生产线两个关键工段的控制要求，分别采用广义预测控制和模糊控制进行理论研究和实际应用。建立了多级分布式过程控制系统实现了对整个生产过程综合自动化。
Firstly , the dissertation generalizes the whole process engineering of ctm production . the working principle of crm ’ s briefly , and then particular analysis the operation principle and technical process of each process of ctm production . based on the analysis the dissertation enumerates all the problems in the intellect control 本文首先从整体上简要介绍了中药生产的总体工艺流程,然后详细分析了中药生产过程各工段的工作原理及工艺流程,在此基础上提出了各工段在智能控制中需要重点注意和解决的问题及难点。
This dissertation is focused on the research of the process intelligent control system of chinese traditional medicine ( ctm ) production . the system include the analysis and research of process engineering of the extraction procedure , concentrate procedure and alcohol - recovery procedure of ctm ’ s , and includes the research of all the sensing elements and valves , and also include the advanced technology of soft sensing . this paper ’ s emphasis is the control mode for each process and the design and development of the intellect control system 本论文的研究工作主要围绕中药生产过程自动化智能控制系统的研制开发而展开,涵盖了中药提取工段、浓缩工段、醇沉及醇回收工段的工艺流程的研究,中药自动化装置所采用的传感器、阀门以及软测量技术的研究,各生产工段控制方法的研究以及中药自动化智能控制系统的设计开发等主要内容。
But in our country , the technique level of mdf production is relatively lower than that of foreign ' s . comparing with the introduced product line , the line of our country has some weak points still . and the domestic product line seldom designs the corresponding computer monitored control system 生产线尚存在一些不足之处，与引进生产线相比，国产的mdf生产线很少配套设计计算机监控系统，只是近几年来部分工段采用了plc控制，计算机控制技术的应用则相对落后。
Chapter 3 introduces black - liquor evaporation and combustion process in alkali recovery . models used in alkali recovery control are summarized and an overview of the alkali recovery control are given . the problems in alkali recovery control research and its development trend are discussed too 2 )第三章介绍了碱回收过程燃烧和蒸发工段的工艺流程，总结分析了国内外对碱回收过程建立的各种模型，概述了碱回收过程先进控制的研究现状和研究成果，并指出了理论研究与实际应用中所存在的问题，以及以后研究的方向。
Solid materials handling and pneumatic conveying system packaged machinery and its equipment and valves are mainly used for conveying , material unloading , dedusting , metering , mixing , packing units in the processing units of the solid materials including powder , particles , powder mixtures and flakes of abs , ps , pe , pp , pom , san , pet , pc , pta , pvc , bpa , sap , as and pmma in the trades of petroleum , chemical industries , chemical fiber , dye , pharmacy , food , electronic , paper making , natural gas , power , environmental protection , metallurgy and etc . . it is applicable for various pneumatic conveying systems and gravity flow conveying systems under the conditions of diluted - phase , densed - phase , high pressure , low pressure and vacuum pressure 固体物料处理和输送系统成套机械及其专用设备、阀门主要应用于石油、化工、电力、化纤、染料、医药、食品、电子、造纸、天然气、环保、冶金等领域中固体物料(含abs 、 ps 、 pe 、 pp 、 pom 、 san 、 pet 、 pc 、 pta 、 pvc 、 bpa 、 sap等粉沫、颗粒物料、粉粒混合物、片状)生产加工过程中输送、卸料、除尘、计量、混合、包装等工段使用，能适用于稀相、密相、高压、低压、负压各种气力输送系统和重力流输送系统。
