半干法脱硫工艺在催化裂化装置中的应用

介绍半干法脱硫工艺首次在清江石化50万t/a重油催化裂化装置上的使用情况,结果表明,在保持原加工能力及相近工况下,半干法脱硫工艺可以将烟气中硫含量降至10 mg/m3以下,达到国家标准(低于100 mg/m3),同时还有助于降低催化烟气中的氮氧化物含量,对再生器流化、三剂旋风分离器和烟机运行无影响,取得了一定的工业应用效果。     

无CCU单元的EFP系统

介绍了在无CCU控制单元前提下，如何满足EFP现场制作系统基本技术要求。在对HL-43摄像机个别电路进行少许改动后，由ENG方式组成EFP方式，扩展了节目制作手段，满足了小型节目及转播车无法到达特殊工作场所的要求。     

催化裂化装置烟机入口暖管膨胀节事故失效分析的有限元计算

某石化公司100×104t/a两段提升管催化裂化装置烟机入口暖管一只DN300单式铰链型膨胀节,在生产运行过程中暖管水平段单式铰链型膨胀节波纹管突然发生爆裂,为分析失效事故原因,对失效的膨胀节进行了有限元计算与分析,并提出了改进措施。     

DX-600发射机并机网络备份冷却控制线路的设计

加装国产变频器作为发射机阻隔风机的备用控制器,对风机控制器的电源通路和故障检测信号通路增设应急处理,同时采用内部编程和温控取样变送输出两套方案来控制变频器的输出,彻底解决了因发射机风机控制器故障而造成的发射机停机故障,增强了发射机运行的安全稳定。     

C504单片机在步进电机控制方面的应用

C504是德国SIEMENS公司生产的单片微控制器,文中介绍了C504单片机在步进电机控制方面的应用,给出了利用C504的资源优势,经过一定的扩展来对步进电机进行控制和控制系统结构及方法,另外,该控制系统还具有人机对话功能和较高的性能价格比。     

A multi-scale framework for CO2 capture,utilization, and sequestration: CCUS and CCU

We present a multi-scale framework for the optimal design of CO₂ capture, utilization, and sequestration (CCUS) supply chain network to minimize the cost while reducing stationary CO₂ emissions in the United States. We also design a novel CO₂ capture and utilization (CCU) network for economic benefit through utilizing CO₂ for enhanced oil recovery. Both the designs of CCUS and CCU supply chain networks are multi-scale problems which require decision making at material, process and supply chain levels. We present a hierarchical and multi-scale framework to design CCUS and CCU supply chain networks with minimum investment, operating and material costs. While doing so, we take into consideration the selection of source plants, capture processes, capture materials, CO₂ pipelines, locations of utilization and sequestration sites, and amounts of CO₂ storage. Each CO₂ capture process is optimized, and the best materials are screened from large pool of candidate materials. Our optimized CCUS supply chain network can reduce 50% of the total stationary CO₂ emission in the U.S. at a cost of $35.63 per ton of CO₂ captured and managed. The optimum CCU supply chain network can capture and utilize CO₂ to make a total profit of more than 555 million dollars per year ($9.23 per ton). We have also shown that more than 3% of the total stationary CO₂ emissions in the United States can be eliminated through CCU networks at zero net cost. These results highlight both the environmental and economic benefits which can be gained through CCUS and CCU networks. We have designed the CCUS and CCU networks through (i) selecting novel materials and optimized process configurations for CO₂ capture, (ii) simultaneous selection of materials and capture technologies, (iii) CO₂ capture from diverse emission sources, and (iv) CO₂ utilization for enhanced oil recovery. While we demonstrate the CCUS and CCU networks to reduce stationary CO₂ emissions and generate profits in the United States, the proposed framework can be applied to other countries and regions as well.     

T6300压缩机控制系统在催化裂化装置中的应用(下)

介绍ICS Trusted的T6300压缩机控制系统在滨化催化裂化装置机组综合控制系统的应用,给出了机组的组成、系统硬件结构、通信和主要控制方案的设计实施。     

Thermochemical transformation of CO2 for CH4 production using metal hydride and carbonates as portable sources

The thermochemical reaction between MgH₂ and Li₂CO₃ is investigated for the first time for the CO₂ transformation into fuels with and without nickel as a catalyst. Successful production of CH₄ with high yields is reached depending on different reaction conditions such as microstructural refining, MgH₂:Li₂CO₃ molar ratio, temperature and time. In absence of a catalyst, a methane yield of 68.2% was achieved by heating the milled MgH₂:Li₂CO₃ mixture at 450 °C for 5 h. The global mechanism involves the reduction of CO₂ from Li₂CO₃ by MgH₂/Mg, producing CH₄ and Li₂O/MgO. For the Ni-catalyzed system, the highest methane yield of >90% was reached at 400 °C after 5 h of thermal treatment. The global process responds to a Sabatier reaction, with a contribution of a direct reduction of CO₂ depending on the starting mol ratio. The results demonstrate that thermochemical activation of the Ni-catalyzed MgH₂:Li₂CO₃ mixture is a powerful process for the generation of CH₄ and CO₂ utilization.     

浅析催化裂化装置余热锅炉烟气脱硝的技术要点

催化裂化装置余热锅炉是炼油企业继自备电厂锅炉之后的又一主要大气污染物排放源。其排放的氮氧化物、二氧化硫、粉尘等大气污染物如得不到有效处理,会对环境造成不利影响。结合某石油化工企业催化裂化装置余热锅炉烟气脱硝工程实例,对催化裂化装置余热锅炉烟气脱硝的技术要点进行了初步分析。     

The Current SI Seen From the Perspective of the Proposed New SI

A revised International System of Units (SI) proposed by the International Committee for Weights and Measures is under consideration by the General Conference on Weights and Measures for eventual adoption. Widely recognized as a significant advance for both metrology and science, it is defined via statements that explicitly fix the numerical values of a selected set of seven reference constants when the values of these constants are expressed in certain specified units. At first sight this approach to defining a system of units appears to be quite different from that used to define the current SI. However, by showing how the definitions of the seven base units of the current SI also fix the numerical values of a set of seven reference constants (broadly interpreted) when the values of these constants are expressed in their coherent SI units, and how the definition of the current SI can be recast into the same form as that of the revised SI under consideration, we show that the revision is not as radical a departure from the current SI as it might initially seem.