Heat pipe air pre-heater is adopted to recover gas heat to heat up cold air for burning, reducing flue gas temperature and increasing heat efficiency of injecting steam boiler 采用热管式空气预热器,利用排烟热量加热冷空气,降低了烟气温度,减少排烟热损失,提高注汽炉热效率。
2 . design scheme of gravity heat pipe air pre-heater is proposed which fits the actual situation of injecting steam boilers . detailed heat calculation and design on heat recovery of flue gas is carrying out 提出了采用适合于注汽炉实际工况的重力热管式空气预热器的设计方案,对烟气的余热回收进行了详细的热力计算和设计。
The study shows that compared with the energy consumption of conventional central air-conditioning system with primary return air, the heat pipe air-conditioning system can save cooling and reheating energy 研究结果表明:在相同的室内设计温度下,采用热管式空调机组处理空气的一次回风集中空调系统比常规的一次回风集中空调系统节省冷量和再热量。
The passage dimension of separation chamber, the heating temperature of intake pipe air and the relevant influence of the ceramic heat insulation coating of combustion chamber upon the compressive ignition process of natural gas were studied by experiment 实验研究了分隔室通道尺寸、进气管空气加热温度、燃烧室陶瓷隔热涂层对天然气压燃着火过程的相关影响。
Taking an office building in guangzhou as an example, this paper investigated the energy consumption of a central air-conditioning system with primary return air using heat pipe air-conditioner at different indoor design temperatures 摘要以广州地区的办公建筑为例,就一次回风集中空调系统在空气处理过程中采用热管式空调机组时,不同室内设计温度下的空调系统能耗进行了分析,并且与常规的一次回风集中空调系统的耗能量进行了比较。
For the sake of realizing compressive ignition of single fueled natural gas and aiming at the characteristics of high spontaneous combustion temperature of natural gas, the separated combustion chamber provided with low heat radiation structure was designed, meanwhile the heating device for the intake pipe air and the ceramic electro-thermal plug heating device inside the separation chamber were set up 摘要为实现单一燃料天然气的压燃着火,针对天然气自燃温度高的特点,设计了具有低散热结构的分隔式燃烧室,同时设置了进气管空气加热装置和分隔室内陶瓷电热塞加热装置。
Firstly, simulate flow field of rear smoke channel, plot velocity magnitude and ash concentration distribution in section of entry of heat pipe air preheater, compare with data which were measured in guiyang power station, verify simulation to be reasonable and right . secondly, simulate all kinds of factors which affect flow field's uniformity such as length, thickness, location of diffluent board, ash concentration, ash diameter, and so on, find the chiefly factors . thirdly, install guide board in curve channel in rear smoke channel, then simulate its " flow field, plot velocity magnitude and ash concentration distribution 在此基础上模拟在冬夏两季不同情况下,不同流速对热管空气预热器壁面温度的影响;然后对影响整个流场分布的各种因素:包括分流板长度、厚度、偏离中心流道位置的偏离度、飞灰浓度、飞灰粒径等因素进行数值模拟;最后提出在分流烟道转弯处加装导流板,并模拟加装导流板后的流场分布,得到下级空气预热器出口、热管空气预热器进口处的断面速度场分布、浓度场分布,以论证加装导流板能达到流场均匀化的作用。
There will appear a very uneven flow field, and appear a very big velocity magnitude distribution and ash concentration distribution near back wall . thus, the velocity magnitude is far bigger than that of optimal design velocity magnitude, which will lead to serious wear and tear in metal face of heater . especially, because of curve structure in front of heat pipe air preheater, there is more serious wear and tear 由于靠近竖井后墙面的烟气流速很大,飞灰浓度也较大,断面速度分布的最大速度大于最佳设计速度的2-3倍,这样将造成受热面的严重磨损,特别是热管空气预热器前端烟道的几何结构有一定的转角,更增加了磨损的程度。