摘要
针对生物质成型燃料燃烧特性,通过优化设计和试验研制出适合生物质成型燃料燃烧的专用链条蒸汽锅炉,该锅炉为单锅筒纵置式布置,采用新型链条炉膛结构。试验得出,锅炉的燃烧效率达96.7%,热效率达83.2%,锅炉排烟中CO、NOx、SO2、烟尘含量分别为360×10-6、116×10-6、44×10-6、26.4 mg/m3,表明锅炉的燃烧效率、热效率较高,锅炉消烟除尘性能较好,排烟中的烟尘、氮氧化物及SO2含量低,符合国家锅炉的污染物排放标准要求。
A special chain-steam boiler applied to biomass briquette was devised through optimum design and performance test to overcome the shortcoming of traditional biomass boiler which had low degree of mechanization and high pollution.The design foundation included the component analysis of biomass briquette, the combustion characteristic of biomass briquette and the main technical parameters of the special chain-steam boiler. The boiler had single longitudinal layout drum and water-fire tube shell, and its combustion equipment was chain grate. Water-cooled wall was installed on both the left and right sides of the furnace, and convection banks fixed on the flanks, while screw smoke tube convection heating surface applied in the drum. During the boiler working, biomass briquettes with certain particle size were fed into chain grate by feed hopper, and then burning in the furnace. The high-temperature flue gas was generated by combustion flowed along the bottom of the drum, then entered the convection banks on the flanks through the export of boiler smokestack, and then entered the convection heating surface of screw smoke tube through the frontal smoke chamber. Passing through economizer and deduster, the exhausted gas was discharged into atmosphere through chimney pumped by induced-draft fan finally. Innovation of the boiler was the new structure of the furnace which has front, middle and rear arch on the upper part of the chain grate to form more efficient air dynamic field. The stability of combustion was improved on account of the arrangement of the arch crown and combustion chambers, and the combustion efficiency was improved also for the high fitting degree of chain grate and furnace in this design. In addition, the screw smoke tube in the drum, which may strengthen the effect of convection heat transfer, could also raise the thermal efficiency of this boiler. For the purpose of achieving to the national standard, new type water film dust collector was chosen to decrease the discharge quantity of atmospheric poll
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2016年第1期243-249,共7页
Transactions of the Chinese Society of Agricultural Engineering
基金
河南省科技创新杰出人才计划(144200510015)
郑州市科技创新团队(131PCXTD588)
