Technical Analysis of Energy Saving and Emission Reducing in China's Cement Industry Based on LEAP Model

[Objective] The study aimed at evaluating the ability to save energy and reduce CO2 emission in China＇s cement industry. [Method] Based on long-term energy alternative planning system software （LEAP）, ＂LEAP of China＇s cement industry＂ model was established to simulate energy conservation and emission reduction in China＇s cement industry from 2010 to 2040 in different technologic situations. E ResultJ To save ener- gy and reduce CO2 emissions, new dry process kiln has priority over other technologies or measures, followed by equipment enlargement, mechani- cal shaft kiln, power generation system based on waste heat, as well as high-efficiency and energy-saving grinding technology, and new prepara- tion technology. If all the advanced technologies and measures are adopted, energy consumption and C02 emissions can be reduced by about 40.76% and 42.97% respectively. [ Condusion] LEAP of model is suitable for analyzing energy saving and emission reducing in China＇s cement industry and other industrial fields.

Analysis on Technical Measures on Energy Saving and Consumption Reducing During Stevia Sugar Production

Based on the analysis of actual energy consumptions during stevia sugar production,practical measures were proposed to save energy（ gas,water and powder） consumption and reduce cost through waste heat recycle and utilization,process improvement,equipment operation efficiency,application of newly energysaving equipment,and some project applications were provided as case study for some techniques and methods adopted in the production.

Saving Energy and Reducing Emission When Recycling Acetone dudng the Production of Soy Phospholipid

Acetone,which is volatile,flammable,toxic,expen- sive and causing serious air pollution,is often used as extracting solvent in the production of powdery soy phospholipid.Recycling and reusing acetone is the key of reducing the cost of production. Therefore,saving energy and reducing emission when recycling acetone are the most important technologies during the production of phospholipid.On the basis of the productivity of powdery phospholipid being 2.4 t every day,43.2 t acetone is reused every 8 h and the total volume of acetone gas emitted is 450.75 m3 (about 901.5 kg).According to the current price of acetone,the lost money is about 7212 yuan RMB.

Present situation and development of saving energy and reducing emission technology in iron ore sintering process

The energy consumption of iron ore sintering process is about 10%- 15%of the total of iron and steel industry.Therefore,it is of great significance to take effective measures to reduce the energy consumption in the iron ore sintering process to reduce the costs of sintering product and cut down the emissions of harmful gases,such as CO_2 and SO_2.In this study,the technology development of saving energy and reducing emission in iron ore sintering process was reviewed and discussed;some new directions and measures of saving energy were presented for the sintering process in the future.

Working Practice on Energy--saving and Consumption--reducing in Coal Preparation Plant of Baiyuan Colliery

针对白源煤业选煤厂生产成本管理存在的问题进行剖析，通过依靠科技创新，加大技改力度，完善工艺流程，强化管理等措施，进行节能降耗，取得了一定的成效。

Energy management and coordination control of microgrid in elevated station of urban rail transit

The rapid development of urban rail transit brings convenience to the public,but its huge energy consumption problem cannot be ignored.A microgrid composed of photovoltaic power generation unit,regenerative braking energy feedback unit and battery energy storage unit is proposed,which provides green power for the station.In order to suppress the fluctuation of photovoltaic power generation and the intermittence of regenerative braking feedback energy,the energy management mode of microgrid is designed according to the illumination situation,braking energy feedback situation,battery state of charge and so on.In addition,a coordination control method based on virtual synchronous generator(VSG)is proposed to realize smooth switching among modes.Finally,the proposed energy management and coordination control method for elevated station microgrid is verified by Matlab/Simulink.The results show that the elevated station microgrid can operate safely and reliably under various energy management modes and realize smooth switching among modes.

Application of Geothermal Energy to New Countryside Construction——A Case Study of Xiong County, Hebei Province

Hujiatai Village, Xiong County, Hebei Province was nominated as the experimental unit of new countryside construction by Hebei Province in 2008. In order to make Hujiatai Village become a new countryside model with friendly ecological and environmental conditions, local energy resources should be considered. In this study, a mode of 'geothermal energy extraction-heat exchange-space heating-reinjection' was adopted to supply heat to resident houses in Hujiatai Village cooperating with a geothermal development entity based on the abundant geothermal resources, thereby constructing a clean, economic and autarkic new countryside energy system, which avoids utilization of fossil-energy, reduces emission of greenhouse gases and generation of solid coal cinder, protecting air and land environment, improving life quality of the people and building a typical model for Hebei Province and even for the whole country.

船舶空调通风系统风管漏风量标准分析

鉴于目前船舶空调通风领域还没有一个统一的限制风管漏风量的标准,通过分析研究船舶行业常用的EUROVENT 2/2标准,并比较了GB 50243—2016、DW144和SMACNA等相关标准,对于在船舶设计、建造过程中对于空调通风系统的漏风量提出了适合我国船舶空调通风系统风管漏风量标准的建议,在设计施工过程中可采取相应手段优化和减少风管漏风量的问题,供船舶设计人员参考。

300 MW亚临界汽轮机机组升级改造技术研究方案

碳达峰与碳中和愿景下,300 MW亚临界汽轮机面临节能降耗综合改造压力。文章提出了3种通流改造方案,主再热参数不变的常规通流改造、主再热升参至超临界温度的通流改造、主再热升参至超超临界温度的通流改造方案,对比了3种方案改造收益,为同类型机组改造提供参考意义。

水能风机在循环水冷却系统的应用

介绍了循环水冷却系统中采用水能风机代替大功率电动机实现节能降耗的实施措施,分析了改造后带来的经济效益。

基于差异特性水泵机组的优选与调控

为有效降低泵站因理论抽水装置效率偏离实际情况产生的方案误差,在聚类方法的基础上,利用历史监测数据对泵站内各抽水装置的特性曲线进行校正,同时将校正结果运用到泵站优化调度模型中,构建基于差异特性水泵机组的泵站优化调度模型,以实现站内机组的智能优选与调控.研究结果表明:校正后曲线的理论抽水装置效率比校正前精度平均提高18.8%,更符合工程实际;相比于人工经验调度方案,基于校正后曲线的差异特性水泵机组优化方案能耗平均降低了9.08%,成本平均降低了3.59%,优于人工经验调度方案;对校正后的多台水泵机组性能曲线进行对比发现,因安装位置、累计运行台时及磨损程度不同,导致泵站内同型号水泵的抽水装置效率产生差异,最大偏差达14.63%,说明长时间运行时的泵站已无法直接通过均分流量完成最优分配,进一步证明了水泵机组差异特性研究的必要性.

基于虹吸原理的水轮机顶盖排水系统优化

水轮机顶盖排水系统是机组安全、稳定运行的核心。当机组主供水方式为顶盖取水时,顶盖部分会出现漏水量大、潜水泵启动时间长、设备损耗率高的问题,同时会带来水淹厂房的风险。对此,从苗尾电站的实际运行情况出发,提出改造方案,并与改造前的运行情况进行对比分析。结果表明,改造后顶盖虹吸排水系统的耗电成本仅为改造前的0.976%,且改造成本短期内即可收回,同时,改造使水轮机顶盖排水效率提升84.2%。此次改造降低了设备的运维费用、延长了设备的使用寿命、显著提升了排水效率,为机组的安全、稳定运行提供了保障。

鞍钢焦化工序大型炉窑热平衡分析

总结分析了鞍钢焦化工序四个大型炉窑的热平衡测试和计算结果,精准掌握了炼焦解冻系统、焦炉、干熄焦系统及化产管式炉的能量消耗和分配情况,为炼焦全流程的节能降耗提供了数据支撑。炼焦各炉窑测试后,通过采取调整解冻系统中加热煤气量和烟气回流比,优化焦炉运行中的焦饼中心温度和空气过剩系数等参数,降低干熄焦系统中的气料比,改善管式炉中的保温效果等措施,实现了各炉窑能效的精准提升,为全面降低炼焦工序能耗提供了有效支撑。

一种节能降噪的液压阀性能检测试验台液压系统

为解决液压阀性能检测试验台液压系统因溢流和节流产生的发热严重、噪音大等问题,提出将伺服电机和定量泵的组合作为液压阀试验台的液压源,通过检测液压阀的输出流量来控制电机转速。通过控制每个时间点的液压泵输出流量略大于液压阀测试所需流量来保证溢流阀的溢流作用。仿真和试验结果表明,液压阀测试液压系统可在保证正常工作的基础上实现节能和降噪,效果分别为33.6%和12.0%。研究成果可为液压试验台设计提供一定参考。

建筑节能设计在工业建筑设计中的运用分析

对建筑工程项目节能设计的可行性进行分析,从水资源节约、土地资源节约、材料节约、保温节能、自然环境利用几方面对建筑节能设计在工业建筑设计中的运用表现进行阐述,并从总体布局设计和房区设计两方面对建筑节能设计在工业建筑设计中的运用途径进行分析探讨。

某纯碱生产企业节能诊断实例分析

为寻找企业降本增效路径,以某纯碱生产企业实施节能诊断为例,在摸清企业能源利用水平的基础上,提出切实可行的节能技改建议。结果表明,该企业2022年轻质纯碱单耗和重质纯碱单耗分别为0.386、0.430 t标煤/t,均未达到行业基准水平;企业在能源管理、计量器具配备、能源统计、设备能效水平等方面均存在明显不足;提出完善企业能源管理体系、加强计量器具配备、制定详细的能源统计制度和评估设备能效水平4条节能改造建议。

100T电炉电极调节控制系统升级改造

分析ET-DecNT电炉电极调节控制系统在使用寿命后期故障频发的原因,构建基于西门子S7-1500PLC硬件的电极调节系统,西门子S7-1500系列PLC构建电极调节系统设备运行稳定可靠,维护更加便捷。淘汰落后生产技术,采用先进的阻抗控制理念。计算变压器档位阻抗最佳工作点,优化冶炼控制模型,改善电极调节器的控制特性,提升电炉在不同冶炼阶段发挥最优电弧功率,提升电炉冶炼效率,节能降耗,同时解决原系统硬件淘汰断供问题。

煤矿供电系统节能降耗技术研究

分析了煤矿供电系统中储能技术和智能控制技术的应用,通过对煤矿供电系统节能降耗优化方案的研究,提出了供电系统智能化建设。基于煤矿供电系统的实际情况,考虑供电系统的各种因素,对智能化供电系统的适用性进行了评估,并进一步提出了供电系统节能降耗的优化措施,以提高供电系统的实用性和效率。

煤矿筒仓局部通风机节能降噪技术研究

近年来,随着技术的发展以及人们对绿色、低碳生产理念的追求,通过技术手段实现筒仓局部通风机的节能降噪成为研究热点。优化筒仓通风机的设计,减少能源浪费和环境污染,不仅可以提高煤矿的经济效益,还可以为矿工提供一个更为舒适和安全的工作环境。主要探讨了局部通风机的工作原理,同时针对其实际运行中存在的高能耗和噪声问题,探讨了变频技术、优化设计和采用节能材料等节能技术,以及采用吸声材料、采用隔音罩和动平衡技术等降噪技术,旨在为煤矿筒仓局部通风机节能降噪改造提供一定的思路。

双碳背景下电石行业发展现状及电石法聚氯乙烯研究进展

聚氯乙烯(PVC)由于具有优异的机械性能、电绝缘性能和阻燃性能,被广泛应用于工业领域。目前PVC的生产工艺主要有电石法和乙烯法。我国由于“富煤缺油”的资源特点,使得国内PVC市场主要以电石法为主。电石生产属于高耗能行业,生产过程中会造成二氧化碳排放和电能消耗。如何核算电石生产行业碳排放以及指导电石行业低碳、节能、可持续发展,是当前迫切需要解决的问题。本文综述了电石行业生产现状、生产规模、节能降耗手段、碳排放核算、PVC行业碳排放,分析了各工序碳排放以及降低碳排放的工艺和措施,以期为电石法制备PVC的低碳减排、节能降耗提供借鉴。