炭烧烤炉污染物散发强度与热功率特性的实验分析

Experimental Analysis on Pollutants Emission Intensity and Heat Power Characteristics of Charcoal Stove

针对目前烧烤业室内污染物散发量大、就餐高峰超标严重，且污染物控制在通风空调设计方面缺乏有关污染物散发强度及负荷计算参数等问题，设计搭建了烧烤实验台，对木炭和机制炭烧烤炉污染物散发强度和热功率特性进行了研究．结果表明：正常燃烧阶段，木炭与机制炭炉污染物散发强度随时间均呈下降趋势，而机制炭炉污染物散发强度相对稳定；正常燃烧阶段，四人式木炭、机制炭炉C02散发强度分别在25mol／h、20mol／h以下，CO散发强度分别稳定在4．0mol／h和2．0mol／h以下；机制炭炉CO散发强度平均值与木炭炉相比降低约30％；当排风量在570～760m3／h之间时，机制炭炉热功率明显高于木炭炉，且最大热功率达到2240W；对流显热功率在一定程度上受补风量的影响，机制炭炉对流显热功率占总热功率的比例平均值处于40％～60％之间．

To solve the problems that pollutams emit in large volume and much exceed the allowed point at peak dining hours, and that there is a lack of pollutants emission intensity, and load calculation parameters in air conditioning and ventilation design, a barbecue experiment was carried out. Pollutants emission intensity and heat power characteristics of wood charcoal stove and machine-made charcoal barbecue stove were studied in the experiment. The results show that pollutants emission speeds of wood and machine-made charcoal stove for four people both presents sustained downward trend and the emission of machine-made charcoal stove is more stable during the normal combustion stage. CO2 emission intensities of wood and machine-made charcoal stove are under 25 mol/h and 20 mol/h, respectively while the CO emission intensities stably remain under 4.0 mol/h and 2.0 mol/h respectively during the normal combustion stage. Average CO emission intensity of machine-made charcoal stove is about 30% lower than that of wood charcoal stove. When the exhaust air volume is in the range of 570--760 m3/h, heat power of machine-made charcoal stove is considerably higher than that of wood charcoal stove, and the maximum value reaches 2 240 W. Additionally, convection sensible heat power is influenced by air volume to a certain extent, and average convection sensible heat power ratio of machine-made charcoal barbecue stove is within 40%--60%.