YQL-1000Q型有机热载体炉的研制

介绍了YQL-1000Q型有机热载体炉新产品的设计选型,侧重介绍了该产品采用燃烧机地面布置的结构特点,与传统的顶置式燃烧机热载体炉相比,燃烧机改为下置地面操作后有利于司炉操作检修方便并使燃烧机处于低温区工作更偏于安全.经过近3年的运行实践和热工测试表明,各项性能指标达到了国家标准和设计要求,有效地满足了用户的使用要求,深受用户青睐.     

低压、粗焦炉煤气自动燃烧机在锅炉上应用

在焦化行业中，由于焦炉煤气压力低、含焦油等杂质较多，进口燃气燃烧机无法满足这样的恶劣工况。文章介绍了一种替代进口燃烧机在恶劣工况下使用的焦炉煤气燃烧机在锅炉上使用的情况。     

全自动轻油燃烧机的设计与分析

全自动轻油燃烧机技术是现代燃烧应用领域的发展方向之一。介绍了全自动轻油燃烧机的结构及其技术特点,给出了全自动轻油燃烧机燃烧头部件、燃油系统、空气系统及控制系统的一般设计方法,并对其设计进行了分析。     

我区复合燃烧节煤技术的开发与应用跃上新水平

广西煤炭资源紧缺由来已久。长期以来,我区中小企业工业锅炉使用的大都是一些质量低劣的燃煤。锅炉的煤耗高,燃烧效率和热效率普遍低下。造成了锅炉出力不足,生产成本攀升等弊端。针对这一状况,南宁先行节能环保机电有限责任公司与科研技术服务单位共同开发了复合燃烧节煤技术。 复合燃烧节煤技术,其技术核心是复合燃烧机,将预先除铁后的原煤经过筛分系统,使原煤中的小颗粒煤和煤粉直接进入复合燃烧机,被高速旋转的叶片切向击碎,经燃烧器喷入炉膛,细煤粉在炉膛迅速充分燃烧,改善了锅炉的燃烧工况,使低劣质煤在沸腾炉与往复炉上都能够得到充分燃烧,产生     

介绍一种燃烧机的新用途

目前市场上大量的国产机和进口商品燃烧机,大多直接用作燃油、燃气锅炉的燃烧设备,相比传统的锅炉燃烧设备,它具有结构紧凑、火焰热强度大、自动化程度高、操作方便、安全保护性好、性能可靠、使用寿命长等特点,显示出它强劲的商用价值和实际应用方面的优越之处,本文介绍的是一种燃烧机的新用途。１热烟风装置结构形式 笔者经过试验研究,将它移用来制作热烟风发生装置,该装置由燃烧机、预燃室、混合风风机组成,其结构如图１所示： 燃烧机安装在预燃室一端,混合风风机用风道与预燃室外圆周风接口相连,燃烧机可自然吸风,亦可串联混…     

基于Fluent软件的束腰型生物质粉燃烧机温度场、污染物排放模拟研究

文章针对一种额定喂料量为150 kg/h的束腰型生物质粉燃烧机,通过建立其数学模型,基于Fluent软件研究不同束腰型结构倾角、束腰口间距和过量空气系数等参数对束腰型生物质粉燃烧机燃烧性能的影响。研究结果表明:束腰型生物质粉燃烧机出火口的物质的平均质量浓度和CO浓度均比直筒型生物质粉燃烧机低,当束腰型结构倾角分别为15,30,45,60°时,CO浓度仅为直筒型生物质粉燃烧机的5%,2.6%,2.8%和1.6%;当束腰口间距分别为0.4,0.5,0.6,0.7 m时,束腰型生物质粉燃烧机出火口的物质的平均质量浓度以及CO_2和O_2浓度相差不大,但是,随着束腰口间距的增大,平均温度呈现出先升高后降低的变化趋势;随着过量空气系数的增大,出火口的平均温度以及CO,CO_2和NO浓度显著减小,物质的平均质量浓度和O_2浓度有所增大;当束腰型结构倾角为30°,束腰口间距为0.5 m,过量空气系数为1.2时,束腰型生物质粉燃烧机的燃烧效果较好。     

丹佛斯油泵喷嘴产品选用问答(一)

油箱与燃烧机间的关系 在油箱安装前,我们必须知道油泵的吸油能力及相关的管径.整个系统的稳定性很大程度上取决于油泵是否有足够的吸力来将油从油箱中吸入至燃烧机中.另外必须考虑的是,油箱的设置应便于加油.     

丹佛斯油泵喷嘴产品选用问答(二)

喷油嘴安装位置 燃烧机生产厂经过无数次试验才确定喷油嘴在其燃烧机上的最佳安装位置,保证其产生最佳的燃烧效果.因而喷油嘴应安装在如燃烧机安装说明书所指定的位置.     

带新型风门控制装置的轻油燃烧机

分析了机电一体化轻油燃烧机的构成,提出了影响轻油燃烧机成本的主要因素之一是其过于复杂的风门控制装置,设计了一种新型风门控制装置,并取得了较好的经济效果。     

油泵、喷油嘴28问?

1 油箱与燃烧机间的关系? 在油箱安装前,必须知道油泵的吸油能力及相关的管径.整个系统的稳定性很大程度上取决于油泵是否有足够的吸力来将油从油箱中吸入至燃烧机中. 另必须考虑的是油箱的设置便于加油.     

Dual fuel mode operation in diesel engines using renewable fuels: Rubber seed oil and coir-pith producer gas

Partial combustion of biomass in the gasifier generates producer gas that can be used as supplementary or sole fuel for internal combustion engines. Dual fuel mode operation using coir-pith derived producer gas and rubber seed oil as pilot fuel was analyzed for various producer gas–air flow ratios and at different load conditions. The engine is experimentally optimized with respect to maximum pilot fuel savings in the dual fuel mode operation. The performance and emission characteristics of the dual fuel engine are compared with that of diesel engine at different load conditions. Specific energy consumption in the dual-fuel mode of operation with oil-coir-pith operation is found to be in the higher side at all load conditions. Exhaust emission was found to be higher in the case of dual fuel mode of operation as compared to neat diesel/oil operation. Engine performance characteristics are inferior in fully renewable fueled engine operation but it suitable for stationary engine application, particularly power generation.     

Performance and emission characteristics of a Kirloskar HA394 diesel engine operated on fish oil methyl esters

The high viscosity of fish oil leads to problem in pumping and spray characteristics. The inefficient mixing of fish oil with air leads to incomplete combustion. The best way to use fish oil as fuel in compression ignition (CI) engines is to convert it into biodiesel. It can be used in CI engines with very little or no engine modifications. This is because it has properties similar to mineral diesel. Combustion tests for methyl ester of fish oil and its blends with diesel fuel were performed in a kirloskar H394 DI diesel engine, to evaluate fish biodiesel as an alternative fuel for diesel engine, at constant speed of 1500 rpm under variable load conditions. The tests showed no major deviations in diesel engine's combustion as well as no significant changes in the engine performance and reduction of main noxious emissions with the exception on NO_x. Overall fish biodiesel showed good combustion properties and environmental benefits.     

双燃料发动机燃烧放热规律分析及燃烧特性研究

从热力学和内燃机燃烧的基本理论入手 ,推导了计算分析双燃料发动机缸内工质成分和热力学参数的计算关系式以及求解双燃料发动机燃烧放热规律的微分方程式 ,基于面向对象技术开发了双燃料发动机燃烧放热规律计算软件。研究结果表明 :用传统柴油机分析方法计算双燃料发动机的放热率峰值偏小 ,所计算的缸内工质平均温度偏高 ,新模型计算的结果与实际情况更为吻合。该分析软件可以适用于多种燃料发动机 ,是内燃机燃烧放热规律的通用计算软件。双燃料发动机燃烧特性研究表明 :双燃料发动机初始放热率比纯柴油大 ,若着火始点在上止点后 ,双燃料缸内最大爆发压力比纯柴油低 ,否则比纯柴油高 ;控制双燃料发动机着火始点是控制缸内最大爆发压力和 NOx 排放的关键 ,双燃料发动机着火始点应在上止点后 ,可以使发动机爆发压力和 NOx 排放比纯柴油低。     

双燃料发动机的燃烧模型

针对双燃料发动机燃烧特性，建立了柴油喷雾扩散燃烧子模型和气体燃烧均质混合气火焰传播燃烧子模型，应用该模型研究了双燃料发动机燃烧机理，计算结果和实验结果相当吻合。计算表明：当引燃柴油比例较大时，双燃料发动机燃烧过程以喷雾混合控制燃烧为主，柴油喷雾扩散燃烧模型与实测较吻合；当柴油比例较小时，该过程以均质混合气火焰传播燃烧为主，均质混合气火焰传播燃烧模型与实测软吻合。计算结果表明，引燃柴油量对双燃料发动机性能影响较大，引燃柴油减少，着火滞燃期延长，缸内最大爆发压力升高。     

Some aspects of hydrogen application as a supplementary fuel to the fuel-air mixture for internal combustion engines

The paper discusses some of the energy-ecological aspects of the increase of production and usage of internal combustion engines. The analysis of the research shows that oil fuels, which are getting exhausted, and which are the main source of air pollution, can be replaced fully or partially by hydrogen, used as a fuel. We have shown the advantages of hydrogen used as a supplementary fuel to the oil fuels, we have shown methods of adding hydrogen to the oil fuels. We have given the basic mathematical relationships to define the coefficients of the internal combustion engines when working with an addition of hydrogen, necessary to design the systems of operation of the engines with hydrogen as a supplementary fuel. We have also studied and analyzed methods to lower the nitrogen oxides when a gasoline engine works with a hydrogen addition.     

Performance and emission characteristics of a DI compression ignition engine operated on Honge, Jatropha and sesame oil methyl esters

The high viscosity of vegetable oils leads to problem in pumping and spray characteristics. The inefficient mixing of vegetable oils with air contributes to incomplete combustion. The best way to use vegetable oils as fuel in compression ignition (CI) engines is to convert it into biodiesel. Biodiesel is a methyl or ethyl ester of fatty acids made from vegetable oils (both edible and non-edible) and animal fat. The main resources for biodiesel production can be non-edible oils obtained from plant species such as Pongamia pinnata (Honge oil), Jatropha curcas (Ratanjyot), Hevea brasiliensis (Rubber) and Calophyllum inophyllum (Nagchampa). Biodiesel can be used in its pure form or can be blended with diesel to form different blends. It can be used in CI engines with very little or no engine modifications. This is because it has properties similar to mineral diesel. This paper presents the results of investigations carried out on a single-cylinder, four-stroke, direct-injection, CI engine operated with methyl esters of Honge oil, Jatropha oil and sesame oil. Comparative measures of brake thermal efficiency, smoke opacity, HC, CO, NO_X, ignition delay, combustion duration and heat release rates have been presented and discussed. Engine performance in terms of higher brake thermal efficiency and lower emissions (HC, CO, NO_X) with sesame oil methyl ester operation was observed compared to methyl esters of Honge and Jatropha oil operation.     

Experimental investigations of a four-stroke single cylinder direct injection diesel engine operated on dual fuel mode with producer gas as inducted fuel and Honge oil and its methyl ester (HOME) as injected fuels

In order to meet the energy requirements, there has been growing interest in alternative fuels like biodiesels, methyl alcohol, ethyl alcohol, biogas, hydrogen and producer gas to provide a suitable diesel oil substitute for internal combustion engines. Vegetable oils present a very promising alternative to diesel oil since they are renewable and have similar properties. Vegetable oils offer almost the same power output with slightly lower thermal efficiency when used in diesel engine [Srivastava A, Prasad R. Triglycerides-based diesel fuels. Renew Sustain Energy Rev 2000;4:111–33. [1]; Vellguth G. Performance of vegetable oils and their monoesters as fuels for diesel engines. SAE 831358, 1983. [2]; Demirbas A. Biodiesel production from vegetable oils via catalytic and non-catalytic supercritical methanol transesterification methods. Int J Prog Energy Combust Sci 2005;31:466–87. [3]; Jajoo BN, Keoti RS. Evaluation of vegetable oils as supplementary fuels for diesel engines. In: Proceedings of the XV national conference on IC engines and combustion, Anna University Chennai, 1997. [4]; Altin R, Cetinkaya S, Yucesu HS. The potential of using vegetable oil fuels as fuel for diesel engines. Int J Energy Convers Manage 2000;42:529–38, 248. [5]; Gajendra Babu MK, Chandan Kumar Das LM. Experimental investigations on a Karanja oil methyl ester fuelled DI diesel engine. SAE 2006-01-0238, 2006. [6]; Agarwal D, Kumar Agarwal A. Performance and emission characteristics of a Jatropha oil (preheated and blends) in a direct injection compression ignition engine. Int J Appl Therm Eng 2007;27:2314–23. [7]]. Research in this direction with edible oils have yielded encouraging results, but their use as fuel for diesel engine has limited applications due to higher domestic requirement [Scholl Kyle W, Sorenson Spencer C. Combustion Analysis of soyabean oil methyl ester in a direct injection diesel engine. SAE 930934, 1993. [8]; Nwafor OMI. Effect of advanced injection timing on the performance of rapeseed oil in diesel engines. Int J Renew Energy 2000;21:433–44. [9]; Nwafor OMI. The effect of elevated fuel inlet temperature on performance of diesel engine running on neat vegetable oil at constant speed conditions. Renew Energy 2003;28:171–81. [10]]. In view of this, Honge oil (Pongamia Pinnata Linn) being non-edible oil could be regarded as an alternative fuel for CI engine applications. The viscosity of Honge oil is reduced by transesterification process to obtain Honge oil methyl ester (HOME).Gasification is a process in which solid biomass is converted into a mixture of combustible gases, which complete their combustion in an IC engine. Hence, producer gas can act as a promising alternative fuel, especially for diesel engines by substituting considerable amount of diesel fuels. Downdraft moving bed gasifiers coupled with IC engine are a good choice for moderate quantities of available biomass, up to 500 kW of electric power. Hence, bioderived gas and vegetable liquids appear more attractive in view of their friendly environmental nature. Since vegetable oils produce higher smoke emissions, dual fuel operation could be adopted for improving their performance.     

低速二冲程双燃料船用主机气缸润滑油自燃引发不正常燃烧问题的研究

介绍了低速二冲程双燃料船用主机的发展现状,指出气缸润滑油自燃引发不正常燃烧是限制其平均有效压力pme提高的关键因素。研究表明:双燃料主机气缸油自燃引发不正常燃烧的内因有两方面:主机结构特征及工作特性,气缸油破碎、蒸发及自燃特性;而主机工况条件、引燃喷射正时等控制参数、过量空气系数、预混合气均匀度、气缸油消耗率、气缸套表面状况等外因,则是气缸油自燃的触发条件。建议在此基础上开展低速二冲程双燃料船用主机的研发工作。     

Dimethyl ether as alternative fuel for CI engine and vehicle

As a developing and the most populous country in the world, China faces major challenges in energy supply and environmental protection. It is of great importance to develop clean and alternative fuels for internal combustion engines. On the basis of researches on DME engine and vehicle at Shanghai Jiaotong University in the last twelve years, fuel injection, combustion, performance and exhaust emissions of DME engine and DME vehicle are introduced in this paper. The results indicate that DME engines can achieve high thermal efficiency and ultra low emissions, and will play a significant role in meeting the energy demand while minimizing environmental impact in China.     

Dimethyl ether as alternative fuel for CI engine and vehicle

As a developing and the most populous country in the world, China faces major challenges in energy supply and environmental protection. It is of great importance to develop clean and alternative fuels for internal combustion engines. On the basis of researches on DME engine and vehicle at Shanghai Jiaotong University in the last twelve years, fuel injection, combustion, performance and exhaust emissions of DME engine and DME vehicle are introduced in this paper. The results indicate that DME engines can achieve high thermal efficiency and ultra low emissions, and will play a significant role in meeting the energy demand while minimizing environmental impact in China.