Problems with leakages at large flanges in the BASF new ammonia plant

Leakage from large diameter flanges had occurred several times in a new 1360 t/d ammonia plant. One such incident resulted in a large fire. The causes of this incident are examined.     

Experience with a simulator for training ammonia plant operators

A computer-based simulator was used for training operators prior to the start-up of a new fertilizer complex which includes a 1,350-MTPD ammonia plant, two 1,100-MTPD urea plants, and a steam and power generation plant with two 18-MW gas turbines. The simulator offered many benefits, which can be used for continued education of operators and engineering studies.     

CIL's experience with a computerized ammonia plant trip system

The computerized trip system has been in use since August, 1985, at the CIL Ammonia II plant. Superior reliability, essential avoiding unnecessary shutdowns, while protecting the plant from accident, is obtained through use of a fault-tolerant configuration.     

Commissioning of CIL's ammonia II plant

Special features of this process design contributed to fast start-up, including the role of the computer simulator for training purposes and the concept of commissioning by process test system.     

Causes of ammonia plant shutdowns survey V

The onstream factor for large tonnage ammonia plants has plummeted to 80.8 percent as inventory control and feedstock curtailment cause almost fifty percent of total downtime.     

Modernization of an ammonia plant safety shutdown system

The Agrium Redwater Nitrogen Operations Ammonia 2 plant underwent a phased project to upgrade and modernize its automatic safety shutdown system. Agrium incorporated the use of safety integrity levels in the functional design and detailed design of the safety shutdown system to ensure that all required protections were implemented in a safe and cost-effective manner. This article discusses the methodology used to determine the scope of the system, the methodology used to define the functional design, the implementation strategy chosen and the key lessons learned from the execution of this project. © 2009 American Institute of Chemical Engineers Process Saf Prog 28:282–292, 2009     

Introduction to expert systems and potential ammonia plant applications

A conceptual approach for applying expert systems to ammonia plants, on an off-line basis, is discussed. These systems can be used for plant problem diagnostics, operator training, safety studies, and risk analysis.     

Guidelines for safe storage and handling of high toxic hazard materials: A new CCPS Publication

The methodology of the work is discussed. An overview of safety procedures for dealing with high toxic hazard materials is provided.     

基于Matlab/GUI的新型界面开发方式

Matlab/GUI是一种新型的图形用户界面开发方式,特别适合能够熟练运用Matlab语言进行仿真但是对VC界面开发了解不够深入的科技工作者。文章先简单介绍Matlab/GUI的基本特点,然后详细说明了一种在实践工程中得到具体应用的GUI界面,力图说明新型的界面开发方式能够在数据处理特别是信号处理方面优于VC平台,具有强大的发展潜力。     

Considerations for the safe design of processes using hydrogen peroxide and organics

The use of hydrogen peroxide in the chemical processing industry is increasing rapidly, both in volume and types of application. The properties of hydrogen peroxide, which make it such a useful material, can also give rise to serious hazards. This paper reviews some of the ways in which hazards may arise in organic processes using hydrogen peroxide. Some incidents are also described.     

Repeating a familiar pattern in a new way: The effect of exploitation and exploration on knowledge leverage behaviors in technology acquisitions

Research Summary: We identify two types of knowledge leverage behaviors undertaken by acquiring firms: integrated and independent knowledge leverage. We address how the prior exploitation or exploration orientation of acquirers influence these two modes of knowledge leverage behaviors. The degree of exploitation of acquirers promotes integrating their existing knowledge with acquired knowledge in innovative actions. In contrast, the degree of exploration of acquirers increases the likelihood that new innovations will use acquired knowledge without integrating it with their prior knowledge. In addition, the firm's prior acquisition rate moderates the relationship between the acquiring firms’ previous exploitation or exploration orientation and their knowledge leverage mode. The findings of this article suggest that pre‐acquisition innovation capabilities are distinct from but influence the post‐acquisition innovation actions. Managerial Summary: Firms often undertake acquisitions to gain access to new knowledge, but they can differ dramatically in how they leverage acquired knowledge. We show that the firm's prior innovation patterns drive this choice. Firms that have previously focused on incremental innovations in their internal innovation efforts tend to integrate acquired knowledge with their own prior knowledge. In contrast, firms that have previously pursued bold innovations tend to leverage acquired knowledge alone in new innovations. Thus, we show that firms use acquisitions as a means to extend their internal innovation patterns—firms that have focused on incremental innovations extend that with acquisitions by linking new innovations to their prior knowledge while firms that have pursued bold initiatives use acquired knowledge to move in new technology directions.