玻璃纤维池窑拉丝联合厂房结构设计要点分析

联合厂房作为玻纤生产线中核心建筑物,结构设计通常分为熔制与拉丝工段两部分进行。但由于结构布置受到工艺条件的要求,其结构布置及性能等方面具有一些特殊性。通过对现行联合厂房熔制与拉丝工段结构体系进行分析,提出了结构设计中涉及的要点,针对设计要点提出了一些具体措施,为工业厂房中类似车间的结构设计提供了参考。     

日用玻璃工厂配料车间工艺设计要点

总结归纳了日用玻璃工厂配料车间工艺设计的原则及要点,包括对各种原料的要求,主要工艺技术数据及设备生产能力的确定,车间工艺布置要求以及环境保护、劳动保护措施的设置。     

玻璃厂原料车间结构设计

原料车间结构类型特殊,结构计算复杂。结合多年设计经验,论述了原料车间结构设计的方法及注意事项,并提出改进工艺的合理化建议,提高了设计质量与效率。     

橡胶防振支承块的结构及硫化模设计

阐述了橡胶防振块的结构、使用和硫化模结构设计，并在防振胶块的配料中掺入聚酯短纤维，有效地改进了其物理性能。     

玻璃厂结构设计的几点探讨

针对玻璃厂的特点,说明了联合车间楼面活荷载的折减,探讨了联合车间的结构形式以及发展方向,对锡槽柱底的结构计算进行了科学的分析比较,可以作为成熟经验运用在玻璃厂的结构设计中.     

浮法玻璃厂原料车间钢结构设计

钢结构框架以其抗震性能良好、自重轻、节约空间和施工周期短的特点成为浮法玻璃厂原料车间结构设计的首选方案。结构布置、荷载取值和节点设计是原料车间结构设计的关键。通过分析原料车间钢结构设计特点,指出应注意的问题,为在浮法玻璃生产线中应用提供参考。     

现代配料车间控制系统概述

控制系统是现代配料车间的神经中构，过去几的中微电子技术的广泛发展在这一领域开创了新的可能性。每个控制系统都应适应各自车间的构造与运行特点。本文介绍一种以存贮程度控制顺（ＳＰＣ）为基础的现代配料车间控制系统。     

合成氨输气总管的结构设计和制造筑炉探讨

根据合成氨输气总管的使用特点,提出了其结构设计和制造应注意的要点,分析了几种常见结构的优劣,强调了耐火衬里施工和烘炉的施工要点,并提出了筑炉、烘炉的参考施工方案。     

选煤厂主厂房常用结构形式对比

阐述了选煤厂主厂房经常采用的结构形式及其特点,并从洗选工艺、设备选型、车间布置、建筑结构设计、工业卫生、建设周期及投资等方面出发,对钢筋混凝土构架结构、钢框架结构和钢模块结构3种常用结构形式进行了对比分析,提出主厂房设计时采用的结构形式应因地制宜。     

化工外管架选型及设计要点的探讨

探讨化工管架的选型及设计要点,并根据全厂外管架的结构体系特点,对结构设计方案的合理选择提出了建议,以达到优化设计的目的。     

Multiproduct batch plants design using linear process performance models

In this contribution, a novel linear generalized disjunctive programming (LGDP) model is developed for the design of multiproduct batch plants optimizing both process variables and the structure of the plant through the use of process performance models. These models describe unit operations using explicit expressions for the size and time factors as functions of the process variables with the highest impact. To attain a linear formulation, values of the process variables as well as unit sizes are selected from a set of meaningful discrete values provided by the designer. Regarding structural alternatives, both kinds of unit duplications in series and in parallel are considered in this approach. The inclusion of the duplication in series requires different detailed models that depend on the structure selected. Thus, in a new approach for the multiproduct batch plant design, a set of potential structural alternatives for the plant is defined. © 2010 American Institute of Chemical Engineers AIChE J, 2011     

On the global and efficient solution of stochastic batch plant design problems

The presence of uncertainty in product demands of batch plant design formulations with fixed structure and continuous equipment sizes transforms them into large-scale nonconvex nonlinear programs. This paper describes recent developments towards the efficient solution of such mathematical models. Two global optimization algorthms, a specialized GOP algorithm and a reduced space branch and bound algorithm, are presented and applied to this class of batch plant design models. It is shown that, by taking advantage of the special structure of the resulting mathematical formulations, encouraging computational results can be obtained from both algorithms for problem sizes that would otherwise be practically unsolvable with conventional global optimization techniques. An efficient, specialized Gaussian quadrature technique is also described for the case of product demands following normal probability distribution functions with which reduced model size and improved estimation of the expected profit integral are achieved. These developments are tested on example problems from the literature covering single batch plant configuration with various scheduling policies and flexible configurations with alternative production sequences.     

合成氨装置低压蒸汽发生器的设计

介绍合成氨装置低压蒸汽发生器的设备结构、选材、结构设计及制造检验等设计思路和方法,分析探讨管程堆焊结构、焊接方式及焊环式密封结构的设计,为合成氨装置中高温高压容器设计总结出一套可行的方法。     

Mathematical modeling for simultaneous design of plants and supply chain in the batch process industry

Most supply chain design models have focused on the integration problem, where links among nodes must be settled in order to allow an efficient operation of the whole system. At this level, all the problem elements are modeled like black boxes, and the optimal solution determines the nodes allocation and their capacity, and links among nodes. In this work, a new approach is proposed where decisions about plant design are simultaneously made with operational and planning decisions on the supply chain. Thus, tradeoffs between the plant structure and the network design are assessed. The model considers unit duplications and the allocation of storage tanks for plant design. Using different sets of discrete sizes for batch units and tanks, a mixed integer linear programming model (MILP) is attained. The proposed formulation is compared with other non-integrated approaches in order to illustrate the advantages of the presented simultaneous approach.     

Synthesis and sizing of batch/semicontinuous processes: single product plants

An approach is reported for the preliminary design of single product batch/semicontinuous plants. The methodology consists of two components: a new approximate sizing procedure, which determines the number of units in parallel at each stage as well as the sizes of the batch and semicontinuous units and a set of synthesis rules, which serve to select structural features such as consecutive tasks that should be merged or split and tasks that should be separated by intermediate storage. The sizing procedure can accommodate both new plant design as well as some simple forms of retrofitting applications. The effectiveness of the approach is demonstrated with comparisons to designs obtained using nonlinear programming formulations solved by using a generalized reduced-gradient algorithm.     

双色内螺纹旋钮的热流道注塑模设计

以内螺纹旋钮的双色注射模为例.阐述双色注射模热流道的结构特点、设计要点以及工作过程.通过对塑件结构特点的分析,确定注塑模具的整体设计方案,并对模具设计过程中的要点和难点进行分析.并介绍一种内螺纹自动脱模机构.该模具的设计方法对双色注射模具设计具有一定的指导意义.     

继续抓紧搞好我国炼油工业结构调整

介绍了近几年来我国炼油工业结构调整已取得的主要成绩和进步;指出我国炼油工业结构性矛盾仍很突出,在企业布局、工厂和装置规模、装置结构、产品结构和质量等方面还存在着有待进一步改进的问题;提出了今后继续抓紧搞好我国炼油工业结构调整的主要方向和措施。