Re-understanding and Thinking about Environmental Impact of Coal-fired Power Plants under Ultra-low Emission

From the perspective of development background,concepts and related policies of ultra-low emission,according to work practice,some issues and difficulties that need to be paid attention to in the environmental impact assessment of ultra-low-emission thermal power projects were discussed from the aspects of evaluation criteria,evaluation grade and scope,pollution control technical lines,environmental benefit accounting,and total emission control,and corresponding recommendations were put forward.

Traditional Chinese Medicine-Based Subtyping of Early-Stage Type 2 Diabetes Using Plasma Metabolomics Combined with Ultra-Weak Photon Emission

The prevalence of type 2 diabetes mellitus(T2DM)is increasing rapidly worldwide.Because of the limited success of generic interventions,the focus of the disease study has shifted toward personalized strategies,particularly in the early stages of the disease.Traditional Chinese medicine(TCM)is based on a systems view combined with personalized strategies and has improved our knowledge of personalized diagnostics.From a systems biology perspective,the understanding of personalized diagnostics can be improved to yield a biochemical basis for such strategies;for example,metabolomics can be used in combination with other system-based diagnostic methods such as ultra-weak photon emission(UPE).In this study,we investigated the feasibility of using plasma metabolomics obtained from 44 pre-T2DM subjects to stratify the following TCM-based subtypes:Qi-Yin deficiency,Qi-Yin deficiency with dampness,and Qi-Yin deficiency with stagnation.We studied the relationship between plasma metabolomics and UPE with respect to TCM-based subtyping in order to obtain biochemical information for further interpreting disease subtypes.Principal component analysis of plasma metabolites revealed differences among the TCM-based pre-T2DM subtypes.Relatively high levels of lipids(e.g.,cholesterol esters and triglycerides)were important discriminators of two of the three subtypes and may be associated with a higher risk of cardiovascular disease.Plasma metabolomics data indicate that the lipid profile is an essential component captured by UPE with respect to stratifying subtypes of T2DM.The results suggest that metabolic differences exist among different TCM-based subtypes of pre-T2DM,and profiling plasma metabolites can be used to discriminate among these subtypes.Plasma metabolomics thus provides biochemical insights into system-based UPE measurements.

The Role of Consciousness in Healing Therapies: A Brief History of Ancestral Energies, Biofield and Ultra-Weak Photon Emission

Healing therapies are a set of techniques used with the aim of transfusing healthy “bioenergy” to other people in order to restore physical, mental, and emotional balance. It is necessary that something is donated from the healer, that is, something results from his organic metabolism. Also, based on your physical, mental, and emotional health, the energy resulting from your metabolism is assumed to be healthy for the healing of patients. On the other hand, also in many cases, healing does not occur due to the “vicious” quality of the energy to be transfused and the low receptivity of the patient. However, in most cases, it depends not only on the healer but also on the receiver, but usually on other healers, such as higher order consciousnesses. In fact, in many cases of healing, the effect is almost instantaneous with just the healer’s “magnetic energy”, especially in painful crises. Without a doubt, I believe that biophoton is an anti-inflammatory, analgesic, antibacterial and immunomodulatory bioenergy. The healing effectiveness of these therapies is well established. It is a cell-restoring product that can rebuild tissues and organs in a short time, which in many cases leads to the restoration of the patient’s health and well-being. The aim of this study is to address a brief history of ancestral energies of Asian philosophy (Chinese, Japanese and Indian), highlight the role of consciousness and the healer in healing therapies. In addition, the study emphasizes the similarity of these energies with the one called “ectoplasm”, as well as it establishes connections with the newly elected ultra-weak emission of photons. Finally, bibliographic research was carried out in an English language database and innovative concepts were introduced about the role of consciousness as well as the healer in healing therapies.

Progressive Failure Analysis of Quasi-isotropic Self-reinforced Polyethylene Composites by Comparing Unsupervised and Supervised Classifications of Acoustic Emission Data

Unsupervised and supervised pattern recognition( PR)techniques are used to classify the acoustic emission( AE) data originating from the quasi-isotropic self-reinforced polyethylene composites,in order to identify the various mechanisms in the multiangle-ply thermoplastic composites. Ultra-high molecular weight polyethylene / low density polyethylene( UHMWPE / LDPE)composites were made and tested under quasi-static tensile load. The failure process was monitored by the AE technique. The collected AE signals were classified by unsupervised and supervised PR techniques, respectively. AE signals were clustered with unsupervised PR scheme automatically and mathematically. While in the supervised PR scheme,the labeled AE data from simple lay-up UHMWPE / LDPE laminates were utilized as the reference data.Comparison was drawn according to the analytical results. Fracture surfaces of the UHMWPE / LDPE specimens were observed by a scanning electron microscope( SEM) for some physical support. By combining both classification results with the observation results,correlations were established between the AE signal classes and their originating damage modes. The comparison between the two classifying schemes showed a good agreement in the main damage modes and their failure process. It indicates both PR techniques are powerful for the complicated thermoplastic composites. Supervised PR scheme can lead to a more precise classification in that a suitable reference data set is input.

掺轻质砂超高性能混凝土的轴拉力学性能

为研究轻质砂对不同试件尺寸下超高性能混凝土(ultra high performance concrete,UHPC)拉伸应变强化性能的影响,采用轻质砂对原黄砂进行等体积替代,完成9组不同轻质砂体积率(0~35%)和不同试件厚度(30~100 mm)的单轴拉伸试验,并同步进行声发射实时探伤测试。结果表明:轻质砂体积率对UHPC弹性极限点对应应力和对应应变的影响较小,但轻质砂体积率由0增加到35%时,UHPC的极限抗拉强度和极限拉应变分别由10.6 MPa和2.35×10^(-3)提高到了19.4 MPa和4.3×10^(-3);轻质砂体积率大于15%时,UHPC的应变强化程度得到显著提升,试件内部产生的损伤点数更多且分布更均匀,展现出良好的裂缝控制能力;在相同轻质砂体积率下,UHPC的应变强化程度随试件厚度的增加而降低,且试件内部的损伤点趋于集中,表现出明显的尺寸效应。

考虑超碳需求响应的综合能源系统低碳优化调度

西北地区新能源发展迅速,充分利用当地独有的光热资源优势,同时结合火电低碳化改造与新能源协同运行,有利于推动当地能源系统绿色低碳转型。为尽最大限度地提升系统的减碳能力,提出一种基于源荷协同降碳的超碳需求响应模型,将动态碳排放因子作为分时电价的惩罚因子,从而将源侧碳信号传递至荷侧,驱使用户侧进行低碳性状态转移。首先,在日前调度阶段,构建预调度-再调度两阶段调度运行机制,再调度根据预调度的系统状态信息进行超碳需求响应,来深度降低系统碳排量。其次,将光热电站引入综合能源系统,与风电场、碳捕集电厂协同运行,从而构建高比例新能源场景,来验证超碳需求响应在此场景下的减碳效益。最后,建立了基于超碳需求响应的预调度-再调度两阶段低碳调度模型。经算例仿真分析表明,所提源荷协同降碳的新思路能有效提高系统的减碳能力,深入挖掘系统的降碳空间,提升系统的经济效益。

既有超高层建筑的绿色低碳改造研究

既有超高层建筑的碳排放是建筑领域碳排放的重要组成部分,但其绿色低碳改造的关键技术集成与创新还不充分,实现碳达峰、碳中和的技术路径还不清晰。本文分析了既有超高层建筑的碳排放核算标准、核算关注点、核算边界和核算方法,从而提出基于能效水平提升、用能结构优化、资源循环利用和ESG体系搭建的既有超高层建筑绿色低碳改造路径。

钢铁行业大气污染治理科技发展分析与展望

钢铁行业是我国工业领域重要的大气污染排放源之一,钢铁行业的大气污染治理是降低重点行业污染排放、打好污染防治攻坚战的重中之重。近年来,我国在钢铁行业大气污染治理方面取得了显著成果。总结了我国“十一五”以来钢铁行业污染防治科技工作的部署,并梳理分析了钢铁行业大气污染治理技术发展的阶段。基于末端治理、源头减排和过程控制、全过程耦合控制三个方面技术发展现状,剖析了当前我国钢铁行业在多污染物协同深度减排和实现超低排放面临的形势和问题。最后,面向“十四五”时期,聚焦碳达峰碳中和目标,提出了相关建议,旨在深化大气污染防治科技工作,为建设“美丽中国”和实现“双碳”目标提供关键科技支撑。在未来的发展中,我们有理由相信,在全社会的共同努力下,钢铁行业将迎来更加清洁、高效和可持续的发展。

60 t/h煤粉预热燃烧锅炉宽负荷运行特性研究

为满足国家“双碳”目标下煤炭清洁高效利用领域的迫切需求,在工业锅炉、电站锅炉等领域开发了煤粉预热燃烧技术。煤粉先进入流态化预热燃烧器中高温改性,再进入锅炉炉膛分级配风燃烧,从而实现了煤高效、低氮燃烧,并在1台60 t/h煤粉锅炉上进行了技术验证。锅炉侧墙对冲布置了2只预热燃烧器,单只预热燃烧器设计热功率为26 MW,以烟煤为原料,在10%~100%负荷范围开展了6个不同负荷的锅炉运行特性和NOx排放特性试验研究,结果表明:该锅炉在各负荷下运行状态稳定、良好,无助燃条件下实现了10%超低负荷稳定运行;预热燃烧器各参数合理、循环状态稳定,满足锅炉宽负荷的运行要求;负荷下锅炉燃烧效率均在97%以上,10%、20%负荷下锅炉热效率大于85%,30%及以上负荷锅炉热效率均在90%以上;通过调整配风,锅炉各负荷下NO_(x)原始排放均低于50mg/m^(3)(φ(O2)=9%)。60 t/h煤粉预热燃烧锅炉的成功示范,为煤粉高效清洁灵活燃烧技术的发展和应用提供了重要支撑。

化学团聚耦合低温省煤器强化除尘协同脱硫废水零排放试验研究

煤燃烧产生的细颗粒物和烟气脱硫产生的脱硫废水是燃煤电厂污染治理的难点。该文提出一种化学团聚耦合低温省煤器强化除尘协同脱硫废水零排放的处理工艺。将加入团聚剂的工艺水或脱硫废水通过双流体雾化喷入低温省煤器前烟道,细颗粒物在化学团聚剂液桥力的作用下发生团聚长大,沿程水分蒸发后,液桥力转化为固桥力形成大的团聚体,耦合低温省煤器促进静电除尘器对细颗粒物的脱除效率。示范试验结果表明,运行化学团聚可使粉尘排放浓度降低63.1%,168 h内平均粉尘排放浓度为2.66 mg/m^(3);基于运行数据优化了团聚剂喷量与低温省煤器循环水量;连续运行脱硫废水对强化除尘效果没有明显影响,实现了超低排放以及脱硫废水零排放。

330 MW循环流化床锅炉深度调峰技术

为推进“双碳”政策的实施,消纳波动性较强的新能源并网发电,当前对火电机组的深度调峰要求越来越高。循环流化床(circulating fluidized bed,CFB)锅炉机组在深度调峰低负荷运行工况有着先天优势,但实现20%以下的超低负荷运行依然面临众多的困难,如炉内流化的稳定性、氮氧化物的排放及炉内局部超温带来的安全性等问题。以某330 MW CFB锅炉的深度调峰技术应用为例,介绍了输煤筛分破碎系统、风帽节流圈、下二次风管等机组部件的改造,并配合烟气再循环等技术应用,成功实现了18%的超低负荷深度调峰运行,同时也很好地控制了NOx的排放。最后总结了CFB机组超低负荷深度调峰技术的关键点和难点,对深度调峰运行带来的潜在问题进行了分析,并提出了相应的解决措施。研究结果具有重要的工程借鉴作用。

汽轮机高位布置超超临界燃煤发电系统变工况㶲经济性分析

可再生能源的迅速普及给电网的稳定性和可靠性带来了挑战,为了解决此问题,燃煤机组承担了调峰调频的主要任务。汽轮机高位布置技术可大幅减少耐高温材料的用量,从而提高超高参数机组的经济性。为获得汽轮机高位布置超超临界燃煤发电机组的变负荷性能,建立了㶲分析和㶲经济性分析模型,分析了不同负荷下机组的㶲经济性,获得了机组变负荷的不可逆性分布。分析结果表明:通过对系统参数进行优化,可以改善高压加热器的㶲效率;采用汽轮机高位布置技术的燃煤机组的度电成本为0.3324元/(kW·h);发电的㶲价格随着负荷的升高而降低。

生物质炉排炉超低排放技术研究

总结了生物质炉排炉目前污染物排放控制措施,分析了各项措施的优缺点,提出“达标第一、综合治理”的控制理念,以反应机理为基础,从燃烧调整角度控制原始排放,优化改造实现脱除能力,动态控制实现最终目标,在实现脱硫、脱硝达标基础上,尽量降低改造及运行成本。通过实际项目应用结果表明:生物质炉排炉通过燃烧优化、逻辑优化、脱硝系统改造、脱硫系统改造,最终可以实现脱硫、脱硝超低排放运行,即SO_(2)≤35 mg/m^(3),NOx≤50 mg/m^(3)。同时此方法可有效降低原始排放,并提升锅炉效率,经燃烧控制逻辑优化后,NO_(x)原始生成量降低50~70 mg/m^(3),SO_(2)原始生成量降低5~10 mg/m^(3),炉内CO含量由之前的8 000~11 000 mg/m^(3)降至1 000~4 000 mg/m^(3)。

130t/h型高温高压循环流化床锅炉优化方案

针对锅炉本身存在的一些问题,阐述锅炉优化的方案及相关考虑,对锅炉局部结构进行改造,从而达到初始排放符合环保政策要求,同时更加优化燃烧,使锅炉达到预期的效果.

钢铁企业减污降碳协同增效技术实践及启示

我国当前正处于深入打好污染防治攻坚战阶段,同时也处于积极部署“双碳”战略目标的开局阶段。钢铁行业是国民经济的支柱产业,推动减污降碳协同增效发展是促进行业绿色可持续发展的关键。本文系统回顾了钢铁生产中烧结、高炉等主要工序在减污降碳协同增效方面的技术发展,并结合企业生产案例分析了超低排放改造在实现减污降碳协同增效方面的成效,以期为我国钢铁行业绿色低碳高质量发展提供参考。

智能化转炉干法除尘水汽柔性调节装置

面对我国日益严峻的环保形势,为满足转炉烟气超低排放的要求,通过分析转炉一次烟气干法除尘的工艺流程和设备原理,研发了配置有柔性调节装置的转炉一次烟气干法除尘新工艺。柔性调节装置采用了智能化调节控制系统,通过其自有的水汽调节装置实时分析转炉状态,智能化地适应转炉的不同冶炼状态,并能及时切换运行模式。生产实践表明,柔性调节装置结构合理,安全可靠,新工艺能有效解决企业在控制成本前提下对转炉一次烟气超低排放的问题,满足环保排放指标要求的同时节约成本。

宝钢原料场无组织扬尘超低排放改造实践

随着国家环保要求的不断提高,倒逼着钢铁行业进行超低排放改造。由于宝钢原料场封闭改造建设启动较早,导致有部分环保措施不符合当前超低排放要求,诸如料场封闭不完全、大棚内抑尘设置不全及物料输送扬尘等。针对此类问题,炼铁厂对照超低排放相关标准,策划原料场改造项目并积极行动,在料场大棚封闭、洗车台设施配备、抑尘设施配备、转运站封闭、落料清扫设施升级等方面采取相应的优化改进措施,确保原料场实现超低排放的目标。

燃煤锅炉超低排放改造技术实践

介绍了某公司目前*号燃煤锅炉脱硝、除尘、脱硫装置的现状及存在问题,探讨了常用的几种燃煤锅炉超低排放改造路线,比较了各自的优缺点,并结合实际选择超低排放改造的工艺路线,详细阐述了本次超低排放改造的主要内容,收集了改造后的运行情况并进行了分析。由运行数据可知,某公司*号锅炉通过超低排放改造技术实践,达到了燃煤电厂污染物排放最新指标要求。

浅谈氢氧化铝气态悬浮焙烧炉超低排放除尘器改进实践

本文分析了氢氧化铝气态悬浮焙烧炉在生产过程中,由于大气治理环保排放指标要求,焙烧炉除尘器需要达到超低排放的标准,否则无法评选环保A级企业,另外还会给生产企业带来无法避免的极板极线检修问题,使得生产不能稳定运行。本文借鉴长时间的设计及施工实践经验,分析问题出现的原因,提出了针对焙烧炉静电除尘器的一些应用问题,采用金属滤袋除尘器改造的具体处理方法,有利于焙烧炉稳定运行。

塔式锅炉NO_(x)排放特性调整研究

某火电厂为了在满足机组发电效率的前提下尽可能挖掘锅炉NO_(x)排放的潜力,对1000MW超超临界塔式锅炉的NO_(x)排放特性进行了优化调整。结果表明,调整后锅炉的NO_(x)排放参数有了明显的改善。本次优化调整对今后同类型机组的运行和调整提供了一定的借鉴意义。