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摘要： 氮化物作为一种重要的原料，广泛应用于化学生产、医药行业、冶金、军事等领域。 氮化物生产控制系统中，氧化炉温度（简称炉温）的稳定程度关系到氮化物生产系统的安全生产、产品质量和尾气处理等问题。氧化炉是 NH3与 O2（来源于空气）进行催化氧化的场所，由于氨气的催化氧化是强放热反应，所以影响氧化炉温度不稳定的因素主要是氨空混合气体的总量以及混合气体中氨气的含量，采取比值控制是达到稳定氧化炉温度的有效手段。论文的主要内容包括：31615
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综述了比值控制的发展及其在氨氧化炉生产氧化炉温度控制中的应用
概述了氨氧化炉生产工艺过程，同时阐明氧化炉控制系统的关键点和生产过程中需达到的工艺指标及其实质原由。 分析了实际生产过程氨空比控制存在的关键问题，进一步总结了传统比值控制方式在氧化炉温度控制中难以达到好的控制效果的原因。
根据一系列的相关分析结果，结合实际生产氧化炉系统的特点，提出双闭环比值炉温控制方案。根据实际具体工程，对该炉温控制方案进行了详细的系统设计和实现方法。
毕业论文关键词： 氨氧化炉，温控系统，vb，OPC
ABSTRACT
Nitride as an important raw material, widely used in chemical production, pharmaceutical industry, metallurgy, military, etc.
Field. China nitride annual output ranked highest in the world, but focused only on the output growth, while ignoring the production process control and raising the level of product quality assurance. Nitride production control system, the oxidation furnace temperature (temperature) of the stability of the relationship to the nitride production system of safety in production, product quality and treatment of tail gas. Oxidation furnace is NH3 and O2 (source in the air) catalyzes the oxidation of places, due to the catalytic oxidation of ammonia is a strong exothermic reaction, so the effect of oxidation furnace temperature instability factors is mainly ammonia and air mixed gas amount and in a mixed gas of ammonia content, take ratio control is an effective way to achieve the stable oxidation furnace temperature. In the traditional ratio control method is used in oxidation furnace control system to do correlation analysis, points out the deficiency, and puts forward a proportion of the ammonia and air temperature control scheme and control system design, implementation and simulation. The main content of the paper is:
The development of ratio control and its application in the temperature control of nitric acid production oxidizing furnace are summarized.
The production process of ammonia oxidizing furnace and the key points and the production process of the oxidation furnace control system are described.
The process and its essence of the need to reach. The key problems of ammonia air ratio control in practical production process are analyzed, and the reasons for controlling the difficulty in the temperature control of the oxidation furnace are summarized.. It lays the theoretical and practical basis for the new control scheme..
3 according to a series of related to the results of the analysis, combined with the characteristics of actual production oxidation furnace system, double closed loop ratio of furnace temperature control scheme is proposed. According to the practical engineering, the temperature control scheme of the system design and the detailed realization method.
Finally, the summary and Prospect of the full text.
Keywords: ammonia oxidizing furnace, temperature control system, OPC, VB
目录
1. 本课题的意义和现状 1
1.1. 课题的目的和意义 1
1.2. 国内外研究现状与水平 1
1.3. 发展趋势 2
2. OPC 技术及其在工业控制系统中的应用 3