Free oxygen control in a digitally fired reheat furnace

塔塔钢铁公司每年有能力生产500万吨钢铁。钢铁为我们提供了许多必要的基础设施，支持从更清洁的建筑技术，到向电动汽车的过渡，甚至可再生能源技术本身的生产。如果某物不是由钢制成的，你通常会发现它是由钢制成的。然而，钢铁生产本身会释放大量温室气体，塔尔博特港是英国最大的工业二氧化碳排放者。该行业致力于实现净零排放，因此正在探索所有提高流程效率、减少排放和环境影响的机会。塔尔博特港每年生产的约350万吨钢铁进入价值更高的下游工序，其中很大一部分必须通过再热炉，这是轧制过程的关键部分。提高性能将显著提高产量、成品率、降低成本和对环境的影响。该项目旨在在塔尔伯特港的再热炉中实现最佳的游离氧。为了解决这个问题，塔塔最近安装了一种最先进的激光光谱仪，用于在炉子运行期间现场测定气体成分。该奖学金通过确定PT再热炉中最有效燃烧所需的最佳氧气来支持这项工作。学生将全面了解燃烧化学计量学和氧化动力学，以研究气体系统的潜在变化如何影响能源效率和产品质量。在超过1200摄氏度的温度下，即使是游离氧浓度的微小变化也会对产品质量和产量产生重大影响，更不用说能耗和吞吐量了。学生将有许多选项可供选择（下面有一些例子）来控制再热炉中的游离氧，利用新的光谱仪实时验证每种方法的好处。减震器控制：对减震器控制器进行改进，以减少不稳定的空气进入（由负压情况引起）燃料压力控制：对控制器进行改进，以稳定进入的气流，以最大限度地提高燃烧效率风扇速度：根据进入的大气分析数据改变/调整燃烧空气流量/压力设定值，以确保在任何时候都精确的化学计量空气-燃料比控制调查富氧的好处/挑战。该学生最终将在开发一种强大的方法来控制游离氧方面发挥重要作用，认识到需要在再热炉中达到最佳状态，以平衡产品质量，产量，吞吐量和能耗。除了传统的博士研究成果外，他们还将为我们国家基础设施的其他部分实现净零目标所需的关键行业的可持续性贡献真实、有形的价值和影响。

Tata steel has the capacity to produce 5 million tonnes of steel each year. Steel provides much of our necessary infrastructure, supporting everything from cleaner building technologies, through the transition to electric vehicles and even the production of renewable energy technologies themselves. If something isn't made from steel, you can usually find that it was made with steel. However, steel production itself releases large amounts of greenhouse gasses, with Port Talbot being the largest industrial CO2 emitter in the UK. The industry is committed to reaching net zero, so is exploring all opportunities to improve efficiency of processes and reduce emissions and environmental impact. Around 3.5million tonnes of the steel produced at Port Talbot each year goes into higher value downstream process and a significant proportion of this must pass through the reheat furnaces, which are a pivotal part of the rolling process. Improving the performance will increase the throughput, yield, reduce cost and the environmental impact significantly.This project aims to achieve the optimum free oxygen in Port Talbot's reheat furnaces. In order to address the issue, Tata have recently installed a state of the art laser spectrometer to determine gas compositions in-situ during furnace operation. This studentship supports that work by determining the optimum oxygen needed for the most efficient combustion in PT Reheat Furnaces.The student would develop a comprehensive understanding of combustion stoichiometry and oxidation kinetics to investigate how potential changes to the gas system might impact energy efficiency and product quality. At temperatures exceeding 1200 Degrees Celcius, even small changes in free oxygen concentration can have a significant effect on product quality and yield, not to mention energy consumption and throughput. The student would have a number of options at their disposal (some examples below) for controlling free oxygen in the reheat furnaces, utilising the new spectrometer to validate the benefit of each method in real time. Damper control: make improvements to the damper controller to reduce tramp air ingress (caused by negative pressure scenarios) Fuel pressure control: make improvements to the controller to stabilise incoming flow to maximise efficiency in combustion Fan speeds: alter/trim combustion air flowrates/pressure setpoints based on incoming atmospheric analysis data to ensure exact stoichiometry at all times Air-fuel ratio control Investigate the benefits/challenges of oxygen enrichment.The student will ultimately play a significant role in developing a robust method to control the free oxygen, recognising the need to reach the optimum condition in the reheat furnaces to balance product quality, yield, throughput and energy consumption. Alongside the traditional PhD research outcomes, they will be contributing real, tangible value and impact to the sustainability of a key industry required for other parts of our national infrastructure to meet net zero goals.