高炉工艺能源利用与优化的研究

当前,随着经济的发展,在钢铁企业中,科学技术手段须由技术进步和技术创新体现,先进的技术才是低成本炼铁的保障。但是当前,钢铁行业的能耗情况相当严重,使用越多对环境的影响越大,而其节能减排的重点环节在炼铁工序阶段。在现行的工艺条件下,高炉的燃料主要以焦炭为主,降低高炉焦比能极大地提高炼铁的生产率。基于此,文章就高炉工艺能源利用与优化进行简要的分析,希望提供一个借鉴。

碳中和背景下“能源化工工艺学”课程教学改革与设计——“煤化工工艺”课改案例

“能源化工工艺学”课程对培养在煤化工、石油化工、材料、新能源等领域的专业技术人才具有重要支撑作用。在国家“碳达峰、碳中和”的双碳战略目标下,“能源化工工艺学”课程如何融合国家重大战略需求,引领学生掌握能源行业碳减排基本理论知识与技能,对培养高素质能源化工专业人才具有重要意义。基于“能源化工工艺学”课程“煤化工工艺”部分的教学改革,作者探讨了如何建立“教、学、研、用”四位一体的教学和评价模式,引领学生理解并掌握低碳煤化工工艺设计理念与基本技能,助力培养服务国家重大战略需求的专业型化工人才。

目标问题导向式教学在能源化工工艺学中的应用

能源化工工艺学是能源化学工程专业的专业课,主要学习能源化工中的方法与原理、典型工艺流程及主要设备、操作条件及控制指标等内容,在培养学生具备独立对工艺过程进行分析、改进和开发新产品等能力发挥重要作用。以合成气制甲醇为例,基于目标问题导向式教学理念对能源化工工艺学教学过程进行了重构,通过目标问题的提出、分析和解决,充分调动学生自主学习的能动性,激发学生学习兴趣,提高学生的科学思辨能力及沟通协作能力,进而达到教学目标。

废弃井地热能开发工艺分析

为解决化石能源日渐短缺的问题,本文以地热能为例,对废弃井中地热能应用的可行性进行研究,从废弃井选取、地热能开发技术应用、地热能应用途径、废弃井地热能未来发展方向几方面,分析废弃井地热能开发工艺的应用方法,相较于太阳能、风能等能源,地热能有着分布广、稳定性强、利用途径广泛等优势,故需要结合废弃井实际情况,应用合适的工艺,开发地热能,以望借鉴。

A Novel Process for Natural Gas Liquids Recovery from Oil Field Associated Gas with Liquefied Natural Gas Cryogenic Energy Utilization

A novel process to recovery natural gas liquids from oil field associated gas with liquefied natural gas (LNG)cryogenic energy utilization is proposed.Compared to the current electric refrigeration process,the proposed process uses the cryogenic energy of LNG and saves 62.6%of electricity.The proposed process recovers ethane, liquid petroleum gas(propane and butane)and heavier hydrocarbons,with total recovery rate of natural gas liquids up to 96.8%.In this paper,exergy analysis and the energy utilization diagram method(EUD)are used to assess the new process and identify the key operation units with large exergy loss.The results show that exergy efficiency of the new process is 44.3%.Compared to the electric refrigeration process,exergy efficiency of the new process is improved by 16%.The proposed process has been applied and implemented in a conceptual design scheme of the cryogenic energy utilization for a 300 million tons/yr LNG receiving terminal in a northern Chinese harbor.

Optimal Design of Water Utilization Network with Energy Integration in Process Industries

Effective utilization of water and energy is the key factor of sustainable development in process industries, and also an important science and technology problem to be solved in systems engineering. In this paper,two new methods of optimal design of water utilization network with energy integration in process industries are presented, that is, stepwise and simultaneous optimization methods. They are suitable for both single contaminant and multi-contaminant systems, and the integration of energy can be carried out in the whole process system, not only limited in water network, so that energy can be utilized effectively. The two methods are illustrated by case study.

Energy Dissipation with Geometric Parameters in Unbaffled Surface Aerator

The dissipation rate of turbulent kinetic energy （ ε ） is the key process parameters for mixing in surface aerators. At constant dynamic variables （rotational speed）, ε is greatly affected by the geometric parameters, such as impeller diameter, cross-sectional area of the tank, liquid height, rotor blade length and immersion height. By doing numerical computation by visimix, present work analyzes the effect of non-dimensional （which is non-dimensionalized through rotor diameter） geometric parameters on ε. With an increase in liquid height, there is an increase in the case of energy dissipation. In the case of tank area and blade length, it is vice versa. Energy dissipation is not affected by the variation in immersion height of the impeller.

Integrated development and industrial application of high sour natural gas purification technology

Aiming at acute characteristics of flammability,explosibility,causticity and leakiness of high sour natural gas,giving full consideration to local natural conditions in Sichuan Province and starting with purification process,the paper analyzed process configurations,energy utilization and conservation,safety and environment protection measures. The integrated technology and engineering scheme for high sour natural gas purification was established and successfully used in industrial application.

THS混动系统共线检讨

在节能减排的政策导向下,国内新能源汽车产业迎来了快速发展。2019年国内新能源车辆产销超过120万辆,保持全球领先地位。因此,针对丰田THS混动系统本土化投产的混线工艺进行检讨,为总装产线兼容常规动力车和THS混动系统车提供参考。

Thermodynamic Analysis of Liquefied Natural Gas(LNG)Production Cycle in APCI Process

The appropriate production of liquefied natural gas(LNG)with least consuming energy and maximum efficiency is quite important.In this paper,LNG production cycle by means of APCI Process has been studied.Energy equilibrium equations and exergy equilibrium equations of each equipment in the APCI cycle were established.The equipments are described using rigorous thermodynamics and no significant simplification is assumed.Taken some operating parameters as key parameters,influences of these parameters on coefficient of performance(COP)and exergy efficiency of the cascading cycle were analyzed.The results indicate that COP and exergy efficiency will be improved with the increasing of the inlet pressure of MR(mixed refrigerant)compressors,the decreasing of the NG and MR after precooling process,outlet pressure of turbine,inlet temperature of MR compressor and NG temperature after cooling in main cryogenic heat exchanger(MCHE).The COP and exergy efficiency of the APCI cycle will be above 2% and 40%,respectively,after optimizing the key parameters.