工业用秸秆燃气燃烧机设计

介绍了"贝龙"牌 BLJQ-X型系列秸秆气化机组秸秆燃气的基本燃烧特性,并按其特性设计出一种工业用的大功率秸秆燃气燃烧机.该燃烧机属于鼓风式燃烧器,可直接用于工业供热.     

国内燃气燃烧机现状及发展趋势

对燃气燃烧机分类及其各种类型的对比进行阐述,介绍了国内燃气燃烧机的产品生产模式,分析燃烧机的空燃比与节能环保、配风及风量调节、自动控制系统和燃烧机工作时安全保护方面的现状,就节能、燃料多样化、自控、点火等燃烧机发展趋势作了简要论述.     

Development of High-speed Rectangle Burner Used in Baked Aluminum Reduction Cells

Bake out of Aluminum reduction cells will affect the normal production and the ultimate life of reduction cell directly. The method of thermal bake out is a key of novel technology which possesses such advantages as well distributed temperature, easy control for the speed of heating up, fully baking for the joint and ramming paste of the edge. The design of the burner is a key technology of thermal bake out. A new high speed rectangle burner has been developed based on the experiment, and the structure of this burner has also been optimized. The new burner an fire easily, burn stably and fully, and has high ratio of load adjustment, and low noise, etc.. It can meet the needs of thermal bake out reduction cells. Its development can provide the technological guarantee for the use of thermal bake out Aluminum reduction cells.     

煤粉燃烧器及雾化炉膛的改装

煤粉燃烧器的应用,大大降低了沥青混合料的加热成本,取得了较大的经济效益,同时也是加热领域科学技术发展的一次飞跃。对雾化燃烧器炉膛进行改装后,通过实际生产验证,取得了初步成功。文章主要从3个方面进行论述：燃烧器的燃烧方式;燃烧炉膛;煤粉供应方式。     

Numerical simulation on low calorific value coal-bed gascombustor and structural design optimization

This paper conducts the full size three-dimensional combustion numerical simulation study on the low-calorific value coal bed gas combustor. It explors the effects of different ratios of swirling wind and straight wind on flow field,temperature field and concentration field when this combustor combusts coal bed gas which methane volume concentration is 30 percent. The optimal ratio of swirling wind and straight wind is gained. Based on this,the number and obliquity of cyclone vane in gas pipeline are further optimized. The results show that when ratio of straight wind is 80 percent and ratio of swirling wind is 20 percent,the good jet flow rigidity is not only possessed,but also the strong spin momentum is brought. Reverse axial velocity grads and reverse velocity in central backflow region are also big,the burning temperature and combustion efficiency are high,and high-temperature region is diffusely distributed. When the number and obliquity of cyclone vane are respective 6 and 60,the mass fraction of methane descends quickly,the mass fraction of methane is low in outlet of combustion region,and the combustion efficiency is high.     

A STUDY OF THERMOTECHNICAL CHARACTERISTICS IN FORCED CONVECTION BATCH FURNACE

An experimental study of heat transfer mechanism and characteristics of high velocity circulation combustion gas in a batch heat treatment furnace with high velocity burner was presented. The regular patterns of variation of total heat flux, heat convection and radiation heat fluxes given heating materials with heating time were obtained. It was revealed from the results of experiment and calculation that inverse heat flux of metal radiation is an unavoidable heat transfer characteristic.     

生物质热风炉燃烧器的数值模拟研究

根据生物质燃气的特点及燃烧稳定性的需求,对燃烧器进行了必要的结构设计。在对生物质热风炉进行试验的基础上,建立了相应的三维分析模型;湍流燃烧模拟采用标准κ-ε模型,通过求解动量方程和能量方程,模拟了生物质燃气的燃烧过程,得到了燃烧器的温度场、流场及生物质燃气各组分的质量分数等高线图,并通过试验验证了分析模型的正确性,为相关设备的设计、模拟、优化及应用提供了有价值的数据。     

沼气-空气混合气层流燃烧速度的研究

本文采用本生灯法对沼气－空气混合气的层流燃烧速度进行了测定和分析，并总结出沼气层流燃烧速度的计算公式。     

加热炉燃烧器的技术改造

对空气雾化内混喷嘴式4650kW热媒炉燃烧器存在火焰不稳、燃烧不充分的问题进行了分析,改用WKMS50威索燃烧器,给出了相应的改进技术指标。实际运行结果表明,改进后的WKMS50威索燃烧器自动化程度高,消除了燃烧迟滞效应,改善了热媒炉工况变化过程中的燃烧效果。     

生物质燃气专用灶具的设计

按照生物质燃气物理、燃烧特性，根据燃烧学、传热学及燃气互换性原理进行燃烧器、锅架高度等理论计算，优化设计出条形火孔旋流燃烧器、柱形极针高频脉冲点火器及双锅支架等各部分结构和尺寸，制作样机后由配气装置配制出各种生物质燃气进行实验研究，最终研究设计出高效节能、低污染、通用性好、易于点火、燃烧稳定的生物质燃气专用灶具。