半干法烟气脱硫除尘一体化技术

文章对半干法烟气脱硫除尘一体化技术作了总体的介绍 ,提出了烟气脱硫除尘一体化技术应着重解决的问题 ,可供新上烟气脱硫除尘项目借鉴     

循环流化床烟气脱硫装置对电除尘器影响研究

在一台75t／h燃煤锅炉上,设计建造了双循环流化床烟气悬浮脱硫系统,在脱硫系统运行前后,对配套电除尘器入口处烟气的温度、湿度、化学成份、粉尘的粒径、表观形貌和比电阻等相关特性进行了比较分析。结果显示,在脱硫系统运行后,可使除尘器入口处烟气的湿度增加,温度降低,尘粒的比电阻下降,从而提高了系统的脱硫效率与电除尘器的除尘效率。还研究了循环流化床烟气脱硫装置对电除尘器工作稳定性和除尘效率的影响,同时提出了应对措施。     

烟气脱硫除尘治理--介绍一种高效脱硫除尘装置

介绍了一种湿法脱硫除尘装置，分析了其除尘脱硫机理，对锅炉用户烟气脱硫除尘治理具有参考价值。     

湿式烟气脱硫除尘系统工艺的研究

对烟气脱硫系统所存在的问题进行了探讨,并根据国外应用情况,提出了适合我国国情的燃煤锅炉烟气脱硫除尘系统的工艺,最后依据实例来说明该系统的工艺优点。     

与袋式除尘器配套的半干法烟气脱硫技术及应用

循环流化床半干法烟气脱硫除尘一体化工艺（DSDFP）是对半干法脱硫丁艺的改进。该工艺的特点是在脱硫塔的前后分别设置一台电场静电除尘器和一台低压脉冲袋式除尘器，电场静电除尘器对烟气进行预除尘，袋式除尘器对脱硫塔出口的高含尘烟气进行除尘。银川热电厂150t／h燃煤锅炉应用了DSDFP系统并进行了运行试验。运行试验结果表明，当进料钙硫比（Ca／S）为1．3、近绝热饱和温度（△T为15℃时，系统的脱硫效率可达85％，烟尘排放浓度小于50mg／m^3，满足目前的环保要求。针对DSDFP系统在经过一段时间运行后出现的布袋除尘器压差增大、锅炉负压不稳定、脱硫塔壁面结垢、塔内喷嘴堵塞等问题，经分析采用控制喷水量、优化水喷嘴布置、严格控制雾化角和喷射距离、在脱硫塔内采用双流体喷嘴、合理设计塔内烟气流场等措施进行解决。     

燃煤锅炉烟气脱硫除尘工艺一体化设计与设备改造

通过对在用燃煤锅炉脱硫除尘设备工艺流程分析,研究其脱硫除尘工艺的关联性,提出新的脱硫、除尘数学模型,并结合捕尘网理论进行脱硫除尘设备一体化集成设计和改造,使锅炉烟气污染物排放达到国家及地方标准指标要求。     

机电一体化设计保证脱硫除尘效果

通过对湿式脱硫除尘装置的机电一体化设计，解决了酸碱液位控制易失灵，浓浆泵易损坏，pH值难控制，用户不熟悉等薄弱环节，提高了系统可靠性，保证了整体效果，是当前燃烧锅炉和炉窑烟气脱硫除尘经济，高效，简便的更新换代产品。     

燃煤锅炉湿法脱硫尾气再热技术方案选择

本文介绍了燃煤电玫湿法脱硫除尘的主要特点和存在烟道湿腐蚀等问题，并提出了利用锅炉热烟气和蒸汽辅助和热系统加热脱硫后低温烟气的防腐技术，通过两个加热方案的技术比较，认为蒸汽加热方案现实可行。     

石灰石湿法烟气脱硫设计裕量的探讨和设计应注意的问题

随着国家对环境保护要求越来越高，近年燃煤火电厂装设石灰石湿法烟气脱硫装置逐渐增多。《火力发电厂设计技术规程》缺乏对脱硫设计的规定，因此各工程对脱硫设计裕量考虑的不统一。本对石灰石湿法烟气脱硫设计裕量进行了探讨。分别对石灰石制浆系统、烟气系统、吸收塔系统、石膏脱水系统和其他系统的设备选择提出了设计裕量和备用数量的看法。本对脱硫效率的选取、烟气量的确定、石灰石质量、脱硫设备布置、脱硫总平面布置、脱硫建构筑物型式等提出了设计时应注意的问题。本供从事石灰石湿法烟气脱硫的设计、制造、建设人员参考。     

湿法脱硫除尘在流化床锅炉中的工程应用研究

对220 t/h循环流化床锅炉烟气净化系统的脱硫除尘系统进行了"超低排放"论证和工程改造,并对改造后的系统进行了实验研究和运行参数优化.结果 表明,结合旋汇耦合装置和管束除尘除雾器的湿法脱硫除尘系统脱硫效率、除尘效率分别可以达到99.89％、98.36％;当系统脱硫除尘状态为吸收塔入口烟温90 ～ 100℃、脱硫浆液p...     

Generation of synthesis gas by partial oxidation of natural gas in a gas turbine

The application of partial oxidation in a gas turbine (PO-GT) in the production of synthesis gas for methanol production is explored. In PO-GT, methane is compressed, preheated, partial oxidized and expanded. For the methanol synthesis a 12% gain in thermal efficiency has been calculated for the PO-GT process, while the product cost decrease with 7%. For DME synthesis simular results are achieved. More development on the reactor and turbine are needed to implement this process in the industry.     

British gas buying rights and natural gas depletion

The UK Government has decided to remove the British Gas Corporation's buying rights for natural gas on the UK Continental Shelf. Here P. Lehmann and N. Shaw look at the possible consequences. They suggest that, in the case of the natural resources market forces will not necessarily result in optimal solutions for society as a whole. Thus, the proposed change is likely to result in over-rapid depletion of natural gas reserves, with consequences for the rest of the economy and other energy industries. It will do little to improve the available information about the amount of unused gas reserves in UK waters. It will increase still further the dominant role of the major oil companies in the energy market and will leave more of the economic rent from North Sea gas with the producing companies     

Reducing the greenhouse gas footprint of shale gas

Shale gas is viewed by many as a global energy game-changer. However, serious concerns exist that shale gas generates more greenhouse gas emissions than does coal. In this work the related published data are reviewed and a reassessment is made. It is shown that the greenhouse gas effect of shale gas is less than that of coal over long term if the higher power generation efficiency of shale gas is taken into account. In short term, the greenhouse gas effect of shale gas can be lowered to the level of that of coal if methane emissions are kept low using existing technologies. Further reducing the greenhouse gas effect of shale gas by storing CO₂ in depleted shale gas reservoirs is also discussed, with the conclusion that more CO₂ than the equivalent CO₂ emitted by the extracted shale gas could be stored in the reservoirs at significantly reduced cost.     

气体光谱数据库对气体辐射特性的影响

利用最新光谱数据库提出了基于数据库的普朗克平均吸收系数计算方法和逐线法,并针对一维平行平板间等温辐射传热问题探讨了逐线法(line-by-line,LBL)、统计窄谱带模型(statistical narrow-band model,SNB)和统计窄谱带关联K模型(statistical narrow-band correlated-K model,SNBCK)计算原理、计算精度和三模型间的偏离变化。结果表明,三种模型的结果吻合较好,几个数据库都比较准确。对于逐线法,表明可采用HITRAN2012(high resolution TRANsmission spectroscopic database)光谱数据库替代HITEMP2010(high-TEMPerature spectroscopic absorption parameters spectroscopic database)数据库来提高计算效率。     

燃气灶的节能研究

该文阐述了家用燃气灶节能的四条新途径。即湍流燃烧，将敞开燃烧改变为半封闭燃烧，增大高温火焰换热面积和复合结构的节能装置设计，试验证明，在家用燃气灶上应用节能装置，能够显著提高热效率，节省燃气，达到节能清洁燃烧。     

减小燃气轮机油气切换时的燃气压力波动

介绍了整体煤气化联合循环发电系统中燃气轮机在开车过程中燃气压力大幅度波动原因及解决方法。     

Natural gas pyrolysis in the regenerative gas heaterPart i: Natural gas thermal decomposition at a hot matrix in a regenerative gas heater

This paper presents the results of an experimental investigation of natural gas pyrolysis at a hot matrix in a high temperature regenerative gas heater. It was demonstrated that formation of pyrocarbon during thermal decomposition of natural gas significantly influences upon the process efficiency. Burn out of the carbon deposits from the matrix during the matrix heating up stage produces components harmful to the environment. To make the pyrolysis process effective and environmentally benign it is necessary to provide special measures to exclude the possibility of pyrocarbon formation during the pyrolysis.     

Oil and natural gas prices and greenhouse gas emission mitigation

The hikes in hydrocarbon prices during the last years have lead to concern about investment choices in the energy system and uncertainty about the costs for mitigation of greenhouse gas emissions. On the one hand, high prices of oil and natural gas increase the use of coal; on the other hand, the cost difference between fossil-based energy and non-carbon energy options decreases. We use the global energy model TIMER to explore the energy system impacts of exogenously forced low, medium and high hydrocarbon price scenarios, with and without climate policy. We find that without climate policy high hydrocarbon prices drive electricity production from natural gas to coal. In the transport sector, high hydrocarbon prices lead to the introduction of alternative fuels, especially biofuels and coal-based hydrogen. This leads to increased emissions of CO₂. With climate policy, high hydrocarbon prices cause a shift in electricity production from a dominant position of natural gas with carbon capture and sequestration (CCS) to coal-with-CCS, nuclear and wind. In the transport sector, the introduction of hydrogen opens up the possibility of CCS, leading to a higher mitigation potential at the same costs. In a more dynamic simulation of carbon price and oil price interaction the effects might be dampened somewhat.     

Natural gas HCCI engine operation with exhaust gas fuel reforming

Natural gas has a high auto-ignition temperature, requiring high compression ratios and/or intake charge heating to achieve homogenous charge compression ignition (HCCI) engine operation. It is shown here that hydrogen in the form of reformed gas helps in lowering the intake temperature required for stable HCCI operation. It has been shown that the addition of hydrogen advances the start of combustion in the cylinder. This is a result of the lowering of the minimum intake temperature required for auto-ignition to occur during the compression stroke, resulting in advanced combustion for the same intake temperatures. This paper documents experimental results using closed loop exhaust gas fuel reforming for production of hydrogen. When this reformed gas is introduced into the engine, a decrease in intake air temperature requirement is observed for a range of engine loads. Thus for a given intake temperature, lower engine loads can be achieved. This would translate to an extension of the HCCI lower load boundary for a given intake temperature.