国家重拳治理燃煤电厂 相关造纸企业小心了

正浆纸技术2018-03-30报道:3月22日,国家发改委就对《燃煤自备电厂规范建设和运行专项治理方案(征求意见稿)》征求意见,其中重点工作任务涉及八大项24个小项,主要涉及严控新建自备电厂、清理违规自备电厂、限期完成环保及能耗改造、坚决淘汰落后产能等工作。《方案》重点摘录如下:1、严格控制新建燃煤自备电厂除国家特殊规定,原则上不在新建、扩建燃煤自备电厂;京津冀、长三角、珠三角等区     

交流量的单片机检测系统设计

在电源系统中,常常需要对交流电源进行监测,其监测量主要为电压、电流、频率、功率因数等。本文介绍了常用单片机采样电路的硬件结构和软件算法;提出了全周期采样算法,并对测量的误差进行了分析。     

甘蔗制糖文摘(五)

小型热电厂的经济运行探讨陈尊理，节能技术，1995（3），2～5小型热电厂一般是化工等行业的自备电厂，以供热为主、发电为辅。如何适当地确定运行方式，以最少的费用，达到最佳的经济效益，这是小型热电厂经济运行的关键所在。本文就以下三方面进行了探讨：①以汽耗特性曲线确定汽轮机的经济运行；②以等微增率准则分析发电机负荷的经济分配；③以变压器损耗负荷曲线确定变压器的经济运行。内循环流化床锅炉研究概况王怀彬等，节能技术，1995（3），6～9甘蔗制糖文摘内循环流化床锅炉，吸收了鼓泡床、外循环流化床和煤粉炉的优点，结构简单…     

《燃煤自备电厂规范建设和运行专项治理方案（征求意见稿）》发布 国家重拳治理行动已经开始

正提示:3月22日,国家发展改革委发布了《燃煤自备电厂规范建设和运行专项治理方案(征求意见稿)》,今后将严控新建燃煤电厂,全面清理违法违规的燃煤自备电厂,并坚决淘汰燃煤自备电厂落后产能。2018年3月22日,国家发展改革委发布《燃煤自备电厂规范建设和运行专项治理方案(征求意见稿)》(以下简称《方案》),面向社会公开征求意见。《方案》中的重点工作任务涉及     

变频调速在制盐企业自备电厂的应用

介绍了变频调速的基本原理,并对其在真空制盐企业自备电厂中的实际运用效果进行了总结。     

自备电厂中小型汽轮机带负荷低温低压除垢技术探讨

中小型孤网运行的造纸厂自备电厂中,因受孤网运行条件限制,汽机流通部分出现结垢现象后,给电厂经济运行带来隐患。我公司热电站通过对水质及蒸汽品质分析,判断1.2万kW汽轮机结垢属高温高压流通部分钠盐积垢,针对部分钠盐在低温低压情况下易溶解的特性,利用后续各生产部门检修的时间对汽轮机进行了低温低压湿蒸汽冲扫除垢,整个冲扫过程为6h,带10%的电负荷,冲扫结束转入正常运行,汽机各项参数达到额定值,从而实现了不停机不停电带负荷运行,避免了停机大修带来的一系列影响,取得了较好的经济效益。1新冲扫过程1.1机冲扫过程降温、降压阶段:时…     

如何提高企业自备热电厂的热经济性

研究企业自备热电厂的能量转换过程,分析其热经济性;讨论削弱热化经济效益的不利因素和提高热经济性的技术措施;提出了热力设备并列运行时负荷的经济分配原则.     

基于Fisher判别分析可分性信息融合的马铃薯VC含量高光谱检测方法

为提高马铃薯VC含量检测结果的准确性和可靠性,提出一种基于Fisher判别分析（Fisher?discriminant?analysis,FDA）可分性数据融合的检测模型输入变量构建方法。首先,利用高光谱成像技术采集200个马铃薯的高光谱信息,通过对比6种预处理方法和原始数据的建模结果,确定多元散射校正为光谱数据的预处理方法;其次,采用竞争性自适应重加权采样（competitive?adaptive?reweighted?sampling,CARS）、连续投影算法（successive?projections?algorithm,SPA）及CARS-SPA组合算法3种方法提取相应特征波长,通过对比分析最终确定34个有效特征波长;然后,将有效特征波长进行FDA可分性数据融合,根据融合的新变量对样本间差异性判别能力的大小进行筛选,确定构建检测模型的输入变量;最后,分别对FDA融合前后筛选的变量建立偏最小二乘模型和反向传播神经网络（back?propagation?neural?network,BPNN）模型,并对检测结果进行对比分析。结果表明,将CARS算法提取的34个特征波长进行FDA融...     

浅谈自备电厂节能降耗

节能降耗是我国的基本国策,实现自备电厂节能降耗,建设资源节约型现代化企业是企业综合竞争力的重要指标。东莞某纸业股份有限公司自备汽轮发电机组装机容量大,机组型号较多,自备电厂供热量达到970t/h,自用电达到500MW/h,是东莞市能源消耗大户,公司始终把节能降耗工作当做一项重要的、日常的工作来抓,依靠技术进步强化管理手段,不断探索节能降耗新思路、新办法,使节能降耗取得了显著成绩。     

我矿自备电厂实行孤网运行的可行性分析

在企业自备电厂中探索建立稳定可靠的“孤网”运行模式对于企业内部电网避免外部因素干扰、提高厂内供配电系统运行可靠性和稳定性、降低用电成本、提高经济效益等方面具有重要意义。本文结合实际情况,探讨了我矿自备电厂实行孤网运行的重要性、可行性及改进方向。     

关于提高汽轮发电机发电能力的探讨

平顶山天河盐业有限公司热电车间装有一台1500kW汽轮发电机,由于配置不合理及汽轮机本体存在有一定缺陷,自投产以来发电负荷一直在50%左右,2002年度通过对系统改造后发电负荷基本达到设计要求。     

Energieträger-Substitution durch Einsatz von Holzbrennstoffen—Charakterisierung eines Heizkraftwerkes der Holzindustrie,Kosten der Strom- und Wärmeerzeugung

The substitution of oil by wood for fuelling is discussed from the practical aspects of a power-heat-coupling in a wood-working plant. Specific performance and cost data are presented and compared with those of other wood processing branches. Energy requirements for the oak wood processing example used here are relatively high, i.e. approx. 700 kilowatt-hours/m³ (power and heat), which can be covered from 70% of production waste in an integrated thermal power plant (44% effective load). For different evaluations of fuel from production waste energy production costs were calculated to lie between 0.13 and 0.16 DM per kilowatt-hour, i.e. they are lower than those for power from public networks. Due to the specific cost characteristics of the thermal power plant, the consumption-related cost distribution gives relatively favourable cost shares for power and heat.     

电力系统数字保护算法的仿真分析

分别对半周期积分算法、两个采样值算法、三个采样值算法、傅氏算法的若干指标,诸如滤波能力、计算时间窗长度、误差大小,利用MATLAB软件进行了仿真分析和比较,为不同使用场合保护算法的选择提供参考.     

基于PSO-LSSVM算法的造纸过程短期电力负荷预测模型

对造纸厂的用电负荷进行预测有利于对生产调度进行合理安排,从而降低能耗。本课题提出了一种粒子群优化算法（PSO）和最小二乘支持向量机（LSSVM）相结合（PSO-LSSVM）的短期电力负荷预测方法,该方法可对造纸厂未来每30 min的电力负荷进行预测。结果表明,采用PSO-LSSVM算法对短期电力负荷进行预测时,预测结果的相对百分误差绝对值的平均值约为0.75%,精度高于其他行业的电力负荷预测值,模型具有良好的可行性和有效性。     

浅谈制盐企业建筑结构防腐与维护

通过对制盐企业热电厂产生污染物的简述以及根据热电厂所处环境腐蚀情况的分析,阐明了制盐企业热电厂建筑防腐的必要性,并介绍几种防腐方案。     

System-wide emissions implications of increased wind power penetration

This paper discusses the environmental effects of incorporating wind energy into the electric power system. We present a detailed emissions analysis based on comprehensive modeling of power system operations with unit commitment and economic dispatch for different wind penetration levels. First, by minimizing cost, the unit commitment model decides which thermal power plants will be utilized based on a wind power forecast, and then, the economic dispatch model dictates the level of production for each unit as a function of the realized wind power generation. Finally, knowing the power production from each power plant, the emissions are calculated. The emissions model incorporates the effects of both cycling and start-ups of thermal power plants in analyzing emissions from an electric power system with increasing levels of wind power. Our results for the power system in the state of Illinois show significant emissions effects from increased cycling and particularly start-ups of thermal power plants. However, we conclude that as the wind power penetration increases, pollutant emissions decrease overall due to the replacement of fossil fuels.     

Energiegewinnung aus Holzabfällen

One of the decisions plant management has to make is whether to produce its own power on the spot or whether to have it supplied by the local energy supply enterprise. Energy requirement data for a medium-sized furmiture plant have been compiled in a model calcolation, based on the operation of a steam motor: costs for plant-produced power are determined accordingly. Decisions in favor of individually produced power require careful consideration of a variety of factors and power production must be safeguarded against certain risks. Finally, different systems of wood gas generation are described e.g. the latest fluidized bed gasification system recently introduced in the USA     

基于STC12C5410AD单片机的单相电参数测量仪设计

以高精度电表集成电路CS5463为计量核心,设计了一种基于STC12C5410AD单片机的单相交流参数测量仪.该系统与采样、过零比较电路配合,利用单片机片内定时器测量频率和相位差;与采样、放大、精密整流和滤波电路配合,利用CS5463片内A/D转换器通过瞬时采样法测量电压、电流有效值计算出视在功率、有功功率和无功功率.通过12864LCD显示出各参数测量值.     

As, Hg, and Se flue gas sampling in a coal-fired power plant and their fate during coal combustion

As, Hg, and Se are the most volatile elements in the flue gas from a coal-fired power plant. Significant amounts of these elements cause an undesired direct gaseous emission, which leads to a serious environmental health risk. The main focus of this study is to evaluate the possibility of simultaneous sampling of these volatile elements using an accurate official method for Hg (the most volatile element). A study of As, Hg, and Se emissions from a 1400 MW coal-fired power plant equipped with electrostatic precipitators (ESPs) was carried out for the combustion of a mixture of two types of coal. Simultaneous sampling of coal, bottom ash, fly ash, flue gas, and particles associated with the gas phase has been performed. Flue gas has been sampled by the Ontario Hydro Method Sampling Train, an ASTM method for Hg speciation. This sampling method was tested for As and Se sampling. As and Se determinations have been performed by HG-AAS, and Hg has been determined by CV-AAS. The results were used to examine the following: overall mass balances, relative distribution of these elements in the coal-fired power plant; As, Hg, and Se concentrations in coal and combustion residues; and predominant oxidation state for Hg in flue gas. The mass balances obtained for As, Hg, and Se were satisfactory in all cases; nevertheless, relative enrichment values in fly ash for As and Se were low; therefore, we concluded that As sampling in flue gas can be conducted by application of the Ontario Hydro Method; nevertheless Se released in the gas phase is not completely collected by this sampling train. Application of this sampling method allowed for performance of Hg speciation. The results indicated that Hg(II) was the predominant species in flue gas. It has also been proved that 24%, more than 99.8%, and 90% for As, Hg, and Se in the stack emissions, respectively, were in the gaseous phase.     

燃用掺混小比例生物柴油对船舶柴油机性能的影响

为探究生物柴油在船舶柴油机上的适用性,基于六缸中速柴油机试验台架,在不同负荷推进特性工况下,对燃用0#柴油、B10生物柴油柴油机的动力性能、经济性能、振动特性和缸内燃烧特性进行对比分析。结果发现：与0#柴油相比,燃用B10生物柴油柴油机的输出功率和耗油量基本不变,耗油率有所升高,但随着负荷的升高有所改善,燃用B10生物柴油使得在25%负荷工况下的柴油机缸盖振动烈度下降,50%、75%、90%、100%负荷工况下的柴油机缸盖振动烈度稍有上升,不同负荷工况下的机体振动烈度均下降;从振动功率谱密度可以看出,两种燃油在不同负荷下低频段的振动响应相似,但高频段处振动响应存在差异;对两种燃油的缸内压力和压力升高率曲线的分析可知,燃用B10生物柴油可以使缸内压力峰值和最大压力升高率升高,燃烧反应速度加快。综上,B10生物柴油在不同负荷工况下动力性能、经济性能、振动特性和缸内燃烧特性方面均表现良好,在船舶柴油机上具有较好的应用前景。