Gasification of furfural residue with coal can realize its efficient and clean utilization.But the high alkali metal content in furfural slag is easy to cause the corrosion of gasifier refractory.Two gasification coal...Gasification of furfural residue with coal can realize its efficient and clean utilization.But the high alkali metal content in furfural slag is easy to cause the corrosion of gasifier refractory.Two gasification coals with different silica alumina ratio and a furfural residue were selected in the study.The effects of furfural residue additions on corrosion of silica brick,corundum brick,high alumina brick and mullite brick were investigated by using XRD,SEM-EDS and Factsage Software,and the corrosion mechanism was analyzed.With increasing furfural residue addition,the permeability of the slags to high-aluminium-bearing refractories first decreases and then increases,while the permeability on silica brick shows a slight decrease trend.Leucite(KAlSi_(2)O_(6))with high-melting temperature is generated from the reaction of K_(2)O and SiO_(2)in slag with Al_(2)O_(3)in refractories after furfural residue is added,which hinders the infiltration of slag in refractories.Kaliophilite(KAlSiO_(4))of low-melting point is formed when K_(2)O content increases,and this contributes to the infiltration of slag in refractories.The acid-base reaction between slag and silica brick is distinctly occurred,more slag reacts with SiO_(2)in the silicon brick,resulting in a decrease in the amount of slag infiltrating into the silicon brick as furfural residue is added.The corrosion of silica brick is mainly caused by the acid-base reaction,while the corrosion of three alumina based refractory bricks of corundum,mullite and high alumina brick is determined by slag infiltration.A linear correlation between the percolation rate and slag viscosity is established,the slag permeability increases with decreasing viscosity,resulting in stronger permeability for the high Si/Al ratio slag with lower viscosity.展开更多
目的:探究多学科诊疗模式(multidisciplinary team,MDT)在慢性难愈合创面诊疗中的应用成效,为优化此类疾病的临床诊疗提供新思路。方法:回顾性分析2015年1月至2023年10月在北京大学第三医院接受手术治疗的慢性难愈合创面患者的临床资料...目的:探究多学科诊疗模式(multidisciplinary team,MDT)在慢性难愈合创面诊疗中的应用成效,为优化此类疾病的临床诊疗提供新思路。方法:回顾性分析2015年1月至2023年10月在北京大学第三医院接受手术治疗的慢性难愈合创面患者的临床资料,共纳入患者456例,包括男性290例,女性166例,平均年龄(49.4±16.9)岁。根据是否进行术前MDT讨论,将患者分为MDT讨论组和非MDT讨论组。MDT总体执行流程包括:启动与医务处备案、收集资料与初次MDT讨论、告知患者诊疗方案并严格执行、病情变化需再次MDT讨论。比较两组患者的一般临床资料、麻醉风险分级、合并症(高血压、糖尿病、冠心病)、慢性难愈合创面的发生病因与部位等资料的差异。治疗效果的主要观察与结局指标包括入院后达到创面愈合所需的手术次数、创面愈合后的复发率、围手术期并发症(肺部感染、严重心血管事件、静脉血栓栓塞症、脑卒中及谵妄等)的发生率、患者满意度评分等。结果:MDT讨论组患者189例,非MDT讨论组患者267例,两组患者的年龄、性别、体重指数、美国麻醉医师协会(American Society of Anesthesiologists,ASA)分级、合并症、慢性难愈合创面的病因与部位等临床资料差异无统计学意义(P>0.05)。MDT讨论组与非MDT讨论组患者获得创面愈合所需的平均手术次数分别为(2.1±1.1)次与(2.8±1.6)次,差异有统计学意义(P<0.001),这种差异在糖尿病溃疡、外伤或手术后感染、放疗后不愈合等3个病因造成的慢性难愈合创面中也有统计学意义(P<0.05)。非MDT讨论组患者在创面痊愈后的复发率是18.0%,稍高于MDT讨论组的14.3%,但差异无统计学意义(P>0.05)。在围手术期并发症方面,非MDT讨论组的发生率也较MDT讨论组高(3.7%vs.2.6%),但差异无统计学意义(P>0.05)。患者满意度方面,MDT讨论组的评分显著高于非MDT讨论组,差异有统计学意义(96.5 vs.91.1,P=0.028)。结论:多学科诊疗模式能够显著减少慢性难愈合创面患者的住院手术次数,提升治愈效率,提高患者满意度,是优化慢性难愈合创面临床诊疗成效的推荐模式。展开更多
基金Shandong Province Natural Science Foundation,China(ZR2020KB014,ZR2022QB206)the National Natural Science Foundation of China(22178001)+1 种基金Anhui Provincial Natural Science Foundation(2308085Y19)Research Project for Outstanding Youth of Department of Education of Anhui Province(2022AH030045).
文摘Gasification of furfural residue with coal can realize its efficient and clean utilization.But the high alkali metal content in furfural slag is easy to cause the corrosion of gasifier refractory.Two gasification coals with different silica alumina ratio and a furfural residue were selected in the study.The effects of furfural residue additions on corrosion of silica brick,corundum brick,high alumina brick and mullite brick were investigated by using XRD,SEM-EDS and Factsage Software,and the corrosion mechanism was analyzed.With increasing furfural residue addition,the permeability of the slags to high-aluminium-bearing refractories first decreases and then increases,while the permeability on silica brick shows a slight decrease trend.Leucite(KAlSi_(2)O_(6))with high-melting temperature is generated from the reaction of K_(2)O and SiO_(2)in slag with Al_(2)O_(3)in refractories after furfural residue is added,which hinders the infiltration of slag in refractories.Kaliophilite(KAlSiO_(4))of low-melting point is formed when K_(2)O content increases,and this contributes to the infiltration of slag in refractories.The acid-base reaction between slag and silica brick is distinctly occurred,more slag reacts with SiO_(2)in the silicon brick,resulting in a decrease in the amount of slag infiltrating into the silicon brick as furfural residue is added.The corrosion of silica brick is mainly caused by the acid-base reaction,while the corrosion of three alumina based refractory bricks of corundum,mullite and high alumina brick is determined by slag infiltration.A linear correlation between the percolation rate and slag viscosity is established,the slag permeability increases with decreasing viscosity,resulting in stronger permeability for the high Si/Al ratio slag with lower viscosity.
文摘目的:探究多学科诊疗模式(multidisciplinary team,MDT)在慢性难愈合创面诊疗中的应用成效,为优化此类疾病的临床诊疗提供新思路。方法:回顾性分析2015年1月至2023年10月在北京大学第三医院接受手术治疗的慢性难愈合创面患者的临床资料,共纳入患者456例,包括男性290例,女性166例,平均年龄(49.4±16.9)岁。根据是否进行术前MDT讨论,将患者分为MDT讨论组和非MDT讨论组。MDT总体执行流程包括:启动与医务处备案、收集资料与初次MDT讨论、告知患者诊疗方案并严格执行、病情变化需再次MDT讨论。比较两组患者的一般临床资料、麻醉风险分级、合并症(高血压、糖尿病、冠心病)、慢性难愈合创面的发生病因与部位等资料的差异。治疗效果的主要观察与结局指标包括入院后达到创面愈合所需的手术次数、创面愈合后的复发率、围手术期并发症(肺部感染、严重心血管事件、静脉血栓栓塞症、脑卒中及谵妄等)的发生率、患者满意度评分等。结果:MDT讨论组患者189例,非MDT讨论组患者267例,两组患者的年龄、性别、体重指数、美国麻醉医师协会(American Society of Anesthesiologists,ASA)分级、合并症、慢性难愈合创面的病因与部位等临床资料差异无统计学意义(P>0.05)。MDT讨论组与非MDT讨论组患者获得创面愈合所需的平均手术次数分别为(2.1±1.1)次与(2.8±1.6)次,差异有统计学意义(P<0.001),这种差异在糖尿病溃疡、外伤或手术后感染、放疗后不愈合等3个病因造成的慢性难愈合创面中也有统计学意义(P<0.05)。非MDT讨论组患者在创面痊愈后的复发率是18.0%,稍高于MDT讨论组的14.3%,但差异无统计学意义(P>0.05)。在围手术期并发症方面,非MDT讨论组的发生率也较MDT讨论组高(3.7%vs.2.6%),但差异无统计学意义(P>0.05)。患者满意度方面,MDT讨论组的评分显著高于非MDT讨论组,差异有统计学意义(96.5 vs.91.1,P=0.028)。结论:多学科诊疗模式能够显著减少慢性难愈合创面患者的住院手术次数,提升治愈效率,提高患者满意度,是优化慢性难愈合创面临床诊疗成效的推荐模式。
