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基于神经元网络的燃油锅炉烟气氧含量的软 被引量:1
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作者 吴伟林 《自动化与仪表》 1997年第5期40-41,共2页
针对目前各种氧含量检测仪表在运行过程中的可靠性差、使用寿命短及价格昂贵等诸多不足,通过探寻锅炉运行中的其他参数与烟气氧含量的映射关系,建立BP神经元网络,提出了燃油锅炉烟气氧含量的软测量方法。结果表明,其精度完全达到... 针对目前各种氧含量检测仪表在运行过程中的可靠性差、使用寿命短及价格昂贵等诸多不足,通过探寻锅炉运行中的其他参数与烟气氧含量的映射关系,建立BP神经元网络,提出了燃油锅炉烟气氧含量的软测量方法。结果表明,其精度完全达到了设计要求。 展开更多
关键词 燃油锅气 氧含量测量 神经元网络 软测量
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造气废锅腐蚀原因调查与对策 被引量:1
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作者 李永恒 《化肥工业》 CAS 1993年第2期3-9,共7页
造气废锅由于使用方法不同和管理水平的高低,其使用寿命长短差别很大。本文全面地论述了以煤、焦为原料的中小型氮肥厂造气立式火管废锅损坏原因和延长废锅使用寿命的方法。
关键词 合成氨 腐蚀
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转化气废锅上升直管局部胀大的修复
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作者 蔡志汉 《化工设备与管道》 CAS 2004年第2期22-24,共3页
主要介绍了化肥厂转化气废锅H1251上升直管A管局部胀大后利用电阻加热的方法进行修复的情况
关键词 转化 上升直管 局部胀大 修复 化肥厂 电阻加热
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WNS型锅壳式燃油(气)锅炉烟气侧腐蚀的原因与防止办法 被引量:1
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作者 黄荣埠 《机电技术》 2006年第2期45-47,共3页
分析了低温腐蚀的机理,认为锅壳式燃油(气)热水锅炉受热面烟气侧腐蚀的主要原因是燃料中硫分高和壁温低,并提出了减轻和防止腐蚀的办法.
关键词 壳式燃油()热水 低温腐蚀 含硫量 壁温
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强化传热技术在燃油(气)锅壳锅炉中的应用
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作者 王建华 王旭 《工业锅炉》 2002年第3期26-30,共5页
分析介绍了燃油(气)锅壳锅炉中提高烟管对流传热系数的几种强化传热技术,并以螺纹烟管为例,分析了强化传热的效果及应用的经济性。
关键词 燃油() 强化传热 应用
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关于锅壳式燃油(气)热水锅炉受热面烟气侧腐蚀的分析
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作者 黄荣捷 《中国建设信息》 2002年第F10期15-17,共3页
分析了低温腐蚀的机理,认为锅壳式燃油(气)热水锅炉受热面烟气侧腐蚀的主要原因是燃料中硫分高和壁温低,并提出了减轻和防止的办法。
关键词 壳式燃油()热水 低温腐蚀 含硫量 壁温
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Corrosion Behavior of TP316L of Superheater in Biomass Boiler with Simulated Atmosphere and Deposit 被引量:11
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作者 印佳敏 吴占松 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2009年第5期849-853,共5页
Corrosion behavior of TP316L was investigated with simulated atmosphere and ash deposition for the superheater in biomass boiler.Corrosion dynamic curves were plotted by mass gain.The results showed that the corrosion... Corrosion behavior of TP316L was investigated with simulated atmosphere and ash deposition for the superheater in biomass boiler.Corrosion dynamic curves were plotted by mass gain.The results showed that the corrosion was dependent on temperature and was greatly accelerated by ash deposition.The mass gain was distinctly reduced in the presence of SO2 with and without ash deposition on the specimens.Corrosion rates with ash deposit at different temperatures were calculated.Two feasible methods were provided to avoid serious high-temperature corrosion in the biomass boiler. 展开更多
关键词 high-temperature corrosion TP316L SUPERHEATER biomass boiler HCL
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Biomass gasification and Polish coal-fired boilers for process of reburning in small boilers 被引量:6
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作者 Hrycko Piotr Lasek Janusz Matuszek Katarzyna 《Journal of Central South University》 SCIE EI CAS 2013年第6期1623-1630,共8页
Reburning was applied to Polish automatic coal-fired retort boiler (25 kW).The use of bio-syngas reduced NOx emissions from the boiler by over 25%,below the significant level of 200 mg/m3 .Reburning was carried out us... Reburning was applied to Polish automatic coal-fired retort boiler (25 kW).The use of bio-syngas reduced NOx emissions from the boiler by over 25%,below the significant level of 200 mg/m3 .Reburning was carried out using an integrated system consisting of the boiler and a fixed-bed 60 kW (GazEla) gasification reactor.The process gas was continuously introduced above the coal burner of the boiler.The process parameters of the boiler and the gasifier were also measured and compared with the other units.Characteristic NOx emissions from automatic and manually operated boilers were also presented. 展开更多
关键词 NOx rebuming coal combustion biomass gasification
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Energy efficiency performance of multi-energy district heating and hot water supply system 被引量:2
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作者 金楠 赵靖 朱能 《Journal of Central South University》 SCIE EI CAS 2012年第5期1377-1382,共6页
A district heating and hot water supply system is presented which synthetically utilizes geothermal energy,solar thermal energy and natural gas thermal energy.The multi-energy utilization system has been set at the ne... A district heating and hot water supply system is presented which synthetically utilizes geothermal energy,solar thermal energy and natural gas thermal energy.The multi-energy utilization system has been set at the new campus of Tianjin Polytechnic University(TPU),A couple of deep geothermal wells which are 2 300 m in depth were dug,Deep geothermal energy cascade utilization is achieved by two stages of plate heat exchangers(PHE) and two stages of water source heat pumps(WSHP).Shallow geothermal energy is used in assistant heating by two ground coupled heat pumps(GCHPs) with 580 vertical ground wells which are 120 m in depth.Solar thermal energy collected by vacuum tube arrays(VTAs) and geothermal energy are complementarily utilized to make domestic hot water.Superfluous solar energy can be stored in shallow soil for the GCHP utilization.The system can use fossil fuel thermal energy by two natural gas boilers(NGB) to assist in heating and making hot water.The heating energy efficiency was measured in the winter of 2010-2011.The coefficients of performance(COP) under different heating conditions are discussed.The performance of hot water production is tested in a local typical winter day and the solar thermal energy utilization factor is presented.The rusults show that the average system COP is 5.75 or 4.96 under different working conditions,and the typical solar energy utilization factor is 0.324. 展开更多
关键词 geothermal energy solar thermal energy district heating hot water supply
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Computational Modeling of Tangentially Fired Boiler(Ⅱ) NO_x Emissions 被引量:1
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作者 郑友取 樊建人 +2 位作者 马银亮 孙平 岑可法 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2000年第3期247-250,共4页
The paper describes numerical and experimental study on reduction of NOx emissions in a 600 MW tangentially fired boiler furnace under different operating conditions. A simplified NOX formation mechanism model, along ... The paper describes numerical and experimental study on reduction of NOx emissions in a 600 MW tangentially fired boiler furnace under different operating conditions. A simplified NOX formation mechanism model, along with the gas-particle multiphase flow model, is adopted. The prediction yields encouraging results as compared to experimental data. 展开更多
关键词 COAL nitrogen oxides tangentially fired boiler
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Technical Measures and Selections for Reducing Flue Gas Heat Loss of Large Coal-Fired Boilers
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作者 Wang Chunchang 《Electricity》 2012年第1期36-39,共4页
The main technologies for reducing flue gas heat loss of pulverized coal-fired boilers are introduced, and the suitability of these technologies for boiler operation and the principles for selection of these technolog... The main technologies for reducing flue gas heat loss of pulverized coal-fired boilers are introduced, and the suitability of these technologies for boiler operation and the principles for selection of these technologies are explored. The main conclusions are: 1) the non-equilibrium control over flue gas flow rates at the inlet of the air heater and the reversal rotation of the air heater rotator should be popularized as regular technologies in large boilers; 2) increasing the area of the air heater to reduce the flue gas heat loss in pulverized coal-fired boilers should be the top option and increasing the area of the economizer be the next choice; 3) low- pressure economizer technology could save energy under special conditions and should be compared with the technology of increasing economizer area in terms of technical economics when the latter is feasible; 4) the hot primary air heater is only suitable to the pnlvefizing system with a large amount of cold air mixed. 展开更多
关键词 exhaust flue gas temperature air heater ECONOMIZER flue gas waste heat recovery hot primary air heater thermal system
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超级克劳斯硫回收装置优化改造总结 被引量:1
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作者 屈政 《中氮肥》 2018年第6期40-42,共3页
兖矿鲁南化工有限公司超级克劳斯硫回收装置于2005年投产,随着运行时间的推移,生产中出现了诸多问题。为了配合净化系统的升级改造,适应于处理低温甲醇洗系统的全部酸性气,以及日趋严峻的环保形势,2016年以来兖矿鲁南化工有限公司对其... 兖矿鲁南化工有限公司超级克劳斯硫回收装置于2005年投产,随着运行时间的推移,生产中出现了诸多问题。为了配合净化系统的升级改造,适应于处理低温甲醇洗系统的全部酸性气,以及日趋严峻的环保形势,2016年以来兖矿鲁南化工有限公司对其超级克劳斯硫回收装置进行了一系列的优化改造,包括更换酸性气废锅及尾气废锅、增设液硫捕集器及酸性气放空火炬、改造冷凝器丝网、二级克劳斯转化器入口前增设预热器等。改造后,硫回收装置运行稳定,基本上解决了尾气炉前带硫的现象,排放尾气中硫化物含量明显降低。 展开更多
关键词 超级克劳斯硫回收装置 改造 酸性 液硫捕集器 酸性放空火炬 冷凝器丝网 预热器
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Experimental study and numerical simulation of gas-particle flows with radial bias combustion and centrally fuel rich swirl burners 被引量:1
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作者 李争起 周珏 +2 位作者 陈智超 孙锐 秦裕琨 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2008年第1期1-8,共8页
Numerical simulation is applied to gas-particle flows of the primary and the secondary air ducts and burner region, and of two kinds of swirl burners. The modeling results of Radial Bias Combustion (RBC) burner well a... Numerical simulation is applied to gas-particle flows of the primary and the secondary air ducts and burner region, and of two kinds of swirl burners. The modeling results of Radial Bias Combustion (RBC) burner well agreed with the data from the three-dimensional Phase-Doppler anemometry (PDA) experiment by Li, et al. The modeling test conducted in a 1025 t/h boiler was to study the quality of aerodynamics for a Central Fuel Rich (CFR) burner, and the Internal Recirculation Zone (IRZ) was measured. In addition, gas-particle flows with a CFR burner were investigated by numerical simulation, whose results accorded with the test data fundamentally. By analyzing the distribution of gas velocity and trajectories of particles respectively, it is found that the primary air’s rigidity of CFR burner is stronger than that of RBC burner, and the primary air mixes with the secondary air later. Furthermore, high concentration region of pulverized coal exists in the burner’s central zone whose atmosphere is reduced, and trajectories of particles in IRZ of CFR burner are longer than that of RBC burner. They are favorable to coal’s ignition and the reduction of NOx emission. 展开更多
关键词 swirl burner gas-particle flows numerical simulation
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Energy Efficiency Classification for Agricultural Heater
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作者 Yonngiung Kim Geumchoon Kang Youngj in Kim Chungkil Kim Jiwon Seo 《Journal of Agricultural Science and Technology(A)》 2012年第10期1149-1154,共6页
Classification of energy efficiency system for agricultural heater was discussed and analyzed in order to derive an energy efficiency classification scheme for agricultural heater. Current practices of energy efficien... Classification of energy efficiency system for agricultural heater was discussed and analyzed in order to derive an energy efficiency classification scheme for agricultural heater. Current practices of energy efficiency programs for other products such as residential gas boiler were investigated and analyzed. Test items including energy efficiency and standby power for agricultural heater were analyzed. With the data of residential gas boiler, grade distribution of energy efficiency system was made and evaluated. An energy efficiency classification scheme for agricultural heater was proposed and applied to agricultural heaters, and the scheme was justified. Introducing a new energy efficiency classification system to the agricultural heater industry, it is expected that considerable amount of fossil fuels can be reduced by adopting energy efficiency classification system. 展开更多
关键词 ENERGY EFFICIENCY agricultural heater heating capacity classifying.
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High Temperature Corrosion of Water Wall Materials T23 and T24 in Simulated Furnace Atmospheres 被引量:8
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作者 赵钦新 张知翔 +2 位作者 成丁南 王云刚 邓翔 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第4期814-822,共9页
Candidate materials for water wall of supercritical and ultra-supercritical utility boilers,T23 and T24,were chosen as the experimental samples and exposed to oxidizing atmosphere,reducing atmosphere and oxidizing/red... Candidate materials for water wall of supercritical and ultra-supercritical utility boilers,T23 and T24,were chosen as the experimental samples and exposed to oxidizing atmosphere,reducing atmosphere and oxidizing/reducing alternating atmosphere separately.The corrosion temperature was 450-550?C.The effects of oxygen con-tent and temperature on the corrosion in reducing atmosphere and alternating atmosphere were investigated.The scanning electron microscope(SEM) and energy dispersive spectrometer(EDS) were used to examine the corroded samples.The results show that the corrosion kinetics of T23 and T24 can be described by the double logarithmic equation and parabolic equation respectively.To describe the corrosion of materials accurately it is not sufficient to analyze the macro-mass gain and the macro-thickness of the corroded layer only,but the EDS should be applied to examine the migration depth of corrosive elements O and S.It is revealed that the corrosion becomes more severe when H2S is present in the corrosive gas.S is more active than O,and Cr can reduce the migration of oxygen but not S.The combination corrosion of S and O and pure [S] has a stronger corrodibility than pure H2S.T24 suffers the most severe corrosion at oxygen content of 0.8%.Corrosion is aggravated when the corrosion temperature is above 450 ℃ in the alternating atmosphere.T23 has better corrosion resistance than T24 and W contributes a lot to the corrosion resistance of T23. 展开更多
关键词 stainless steel mass gain element migration high temperature corrosion
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脱碳系统问题分析及处理措施
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作者 罗剑 《中国科技期刊数据库 工业A》 2019年第5期233-233,236,共2页
针对中化重庆涪陵化工有限公司氮肥厂低变气废锅炉水总碱度高、脱碳溶液易起泡现象及,分析其产生的原因,并采取整改的措施,有效地取得了良好的效果,为,确保装置安全、平稳、长周期的运行打下夯实的基础。
关键词 脱碳系统 低变 带液 起泡 原因分析 处理措施
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Research and Development of Hot Primary Air Heater for Coal-Fired Boilers in Power Plant
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作者 Wang Chunchang 《Electricity》 2011年第3期35-39,46,共6页
The reasons of introducing cold air into pulverizer are analyzed for boilers with large capacity and high parameters. The temperature rises of the exhaust gas are calculated when varying the amount of the cold air. Th... The reasons of introducing cold air into pulverizer are analyzed for boilers with large capacity and high parameters. The temperature rises of the exhaust gas are calculated when varying the amount of the cold air. The hot primary air heater, a new technology, is developed to eliminate the cold air from the pulverized coal system. The applications, advantages and disadvantages are introduced in detail for the new device and system. It is concluded that introducing cold air into pulverizer is one of the major factors that causes the exhaust gas temperature of boilers with large capacity to be high. The amount of the cold air could be reduced signif icantly, even to zero in some cases by adopting the hot primary air heater, which drops the exhaust gas temperature of the boiler effectively. The hot primary air heater, which could play part roles of the steam-air heater or the hot air recirculation system, could also be used to adjust the exhaust gas temperature within the range of 20 ℃ by controlling the flow rate of the cooling medium. Moreover, the startup period of the steam-air heater or the hot air recirculation system will be shortened, which is a unique advantage of the hot primary air heater among the measures to drop the exhaust gas temperature. 展开更多
关键词 hot primary air heater exhaust gas temperature pulverized coal system hot air recirculation steam-air heater
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Simulation on Soot Emission Control in Stoker-Fired Boiler by Secondary Air
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作者 Qingcheng Wang 《Journal of Environmental Science and Engineering(A)》 2012年第1期46-48,共3页
A work on soot emission control simulation in stoker-fired boiler by secondary air has been done. Some models such as k-e, combustion, radiation, and soot Khan-Greeves have been adopted. Soot production and emission h... A work on soot emission control simulation in stoker-fired boiler by secondary air has been done. Some models such as k-e, combustion, radiation, and soot Khan-Greeves have been adopted. Soot production and emission has been reduced by secondary air; the highest mass concentration is reduced from 7.46 × 10^-14 to 6.94 × 10^15; mass concentration of soot is decreased from 1.12 ×10^-15 to 9.25 ×10^-32 in the upper areas. 展开更多
关键词 SOOT stoker-fired boiler secondary air simulation.
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Heating and Cooling Hybrid System with Gas Mixture Sourced Heat Pump and Heating Boiler
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作者 S. Egnatosyan Z. Melikyan 《Journal of Energy and Power Engineering》 2011年第11期1021-1029,共9页
Preliminary investigation shows that air sourced type heat pumps by energy efficiency are competitive with gas boilers having 93% of coefficient of performance (COP) if heat pumps are used in climatic zones, having ... Preliminary investigation shows that air sourced type heat pumps by energy efficiency are competitive with gas boilers having 93% of coefficient of performance (COP) if heat pumps are used in climatic zones, having outside air temperature higher than (-3 ℃ to -5 ℃). But, in such conditions the heat pump's evaporator is covered by ice crust, which cuts off the flow of outside air-heat source through the evaporator of heat pump. For avoiding stating problems it is recommended to use as heat source a mixture of waste warm gases. In this article a high efficiency heating-cooling system is developed, consisting of warm gases mixture sourced heat pump, heating boiler operating simultaneously with heat pump and solar air heater. The heating demand of the served house is shared between boiler and heat pump. Instead of outside air the warm gases mixture enters into evaporator of heat pump. A new construction of heat exchanger was developed. The article presents the structure and principle of operation, as well as the method for optimization and design of suggested system. Analysis proved high energy efficiency and cost effectiveness of the new system. 展开更多
关键词 GAS MIXTURE heat pump BOILER hybrid system HEATING cooling.
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厨房的热气
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作者 桑田 《现代青年》 2019年第1期87-87,共1页
我原以为,自己最喜闻乐道的是讲台,可真正的地方,竟然是灶台——它才是一生难想见的'胜地'。人家说锅气、烟火气,一个家的温度全部在厨房里,我终于懂了那是什么意思:刚组成这个家时,是公公婆婆一趟趟,开车将'货物'运齐... 我原以为,自己最喜闻乐道的是讲台,可真正的地方,竟然是灶台——它才是一生难想见的'胜地'。人家说锅气、烟火气,一个家的温度全部在厨房里,我终于懂了那是什么意思:刚组成这个家时,是公公婆婆一趟趟,开车将'货物'运齐:连四个水瓶下的四个垫子,他们都买了整套。再不久,我惊奇发现,丈夫在抽油烟机的四个棱角,用相同大小的海绵,包裹得整整齐齐,怕我烧饭磕着头。又过了一段时间,婆婆在家每做一件事. 展开更多
关键词 水瓶 锅气 运齐 人家 厨房 讲台 喜闻 婆婆 乐道
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