Biomass(sawdust) gasification with air of the atmospheric pressure in the bubbling fluidized bed biomass gasifier was studied.Parameters were analyzed included equivalence ratio 0.13～0.33,temperature of the gasifier bed 760～860℃.The results showed that: The main ingredients of gases were H2:6.2%～14.1%,CO:9.9%～30.2%,CH4:1.6%～11.2%,gas yield was1.0m3/kg～1.74m3/kg,low gas heat value was 3526kJ/m3～9184kJ/m3,carbon conversion rate was 52.3%～82.3%,the gasification efficiency was 38%～69.1%.
Objective To make a retrospective analysis of the outcome and prognosis of open reduction and internal fixation in the treatment of displaced intra-articular calcaneal fractures.Methods From January 2007 to January 2010,38 patients with displaced intra-articular calcaneal fractures treated by open reduction and plates fixation were identified.24 of males and 14 of females patients were included in this study.All patients had special plates fixation through a lateral approach.All cases were followed up for at least 2 years,with radiologic check-up by X-ray and CT imaging.Clinical results were evaluated by American orthopedic foot and ankle society hindfoot scale(AOFAS),foot function index(FFI),10-scale visual analogue scores(VAS).Results A total of 38 patients were included,consisting of 17 of sanders type Ⅱ and 21 of sanders type Ⅲ fractures.Preoperative Bohler′s angle was-24°-33°,with an average of(13.2±8.9)°,which recovered to 20°-45°,with an average of(33.8±9.2)°.No significant difference was found between groups based on sanders type or age(all P 0.05),however,better results were obtained in anatomic reduction and iliac autografts group for AOFAS,FFI and VAS,as compared with patients who did not have anatomic reduction or iliac autograft(all P 0.05).Conclusion The results of this study demonstrate that mid-term prognosis of displaced intra-articular calcaneal fracture is correlated significantly with individual features of cases,degree of anatomic reduction of subtalar joint and recovery of Bohler′s angle,while no correlation with sex and fractures type.
Based on self-built fluidized bed biomass gasifier bench in Laboratory, carried out on the test of atmospheric gasification on the sawdust with air of the atmospheric pressure. Analysised the component, production rate, calorific value, carbon conversion rate and gasification efficiency of the biomass gas, then concluded the variation of those indicators according to the curve drawn by the experimental data. It is a reference for engineering application.
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