热再生设备第二烘干筒的热效率分析和性能优化设计
发布时间：2018-11-13 07:21
【摘要】：伴随着我国高速公路的发展,废旧沥青混合料的再生成为人们日益关注的焦点,因此废旧沥青混合料厂拌热再生技术成为了研究的热点。强制间歇式沥青混合料搅拌设备配套再生设备的第二烘干筒是该再生系统的关键设备,第二烘干筒的热效率影响着整个系统的能耗和生产效率,而且热效率的提高对于节能环保也有着非常重要的意义。本文概述了沥青路面老化损坏和旧沥青混合料再生的机理,简单介绍了强制间歇式沥青混合料厂拌热再生设备的相关情况和设备的主要结构及生产工艺流程;本文在研究燃料燃烧特性的基础上,对燃料燃烧所需空气量和产生烟气量,燃烧产生热烟气的温度,燃料使用量等参量进行分析计算,基于上述参量计算出第二烘干筒在工作过程中的耗热量并由此得到烘干筒的热效率,根据计算结果可知该烘干筒热效率偏低有一定的提升空间;本文根据计算烘干筒各个区段热烟气的温度,计算出烘干筒的结构尺寸,这与烘干筒厂家提供的结构尺寸基本一致,验证了相关计算的合理性;根据热烟气温度计算出烘干筒各个区段的旧沥青混合料的体积,依此划分烘干筒各个区段的长度;利用流体分析软件Fluent对阿曼3000型强制间歇式沥青混合料厂拌热再生设备第二烘干筒筒内温度场和筒壁温度分布进行分析,得到烘干筒内和筒壁的温度分布情况,也得到烘干筒轴线方向上热烟气温度的变化情况,由此验证了烘干筒区段划分的合理性,最后根据同类型烘干筒生产厂家进行的现场试验,验证其筒壁温度分布情况与仿真结果一致;利用仿真软件Matlab对烘干区段的料帘进行分析,通过建立物料温升情况的数学模型,得到烘干区叶片的结构角和安装角不同时物料的温升曲线,由此可以得出要得到最理想的温升曲线二者应该取多少,这可以指导烘干区段叶片的优化性能的设计,从而提高烘干筒热效率;在烘干筒筒内叶片设计时,为了达到预热的目的且能防止物料撞击火焰,烘干筒预热区段采用盒型叶片,这提高了烘干筒的热效率。
[Abstract]:With the development of expressway in our country, the recycling of waste asphalt mixture has become the focus of more and more attention, so the hot recycling technology of waste asphalt mixture has become a hot spot. The second dryer is the key equipment of this regeneration system, and the thermal efficiency of the second dryer affects the energy consumption and production efficiency of the whole system. Moreover, the improvement of thermal efficiency is of great significance for energy saving and environmental protection. In this paper, the mechanism of asphalt pavement aging damage and old asphalt mixture regeneration is summarized, and the related situation of forced intermittent asphalt mixture hot recycling equipment, the main structure and production process of the equipment are briefly introduced. Based on the study of fuel combustion characteristics, this paper analyzes and calculates the parameters such as the amount of air needed and the amount of flue gas produced by fuel combustion, the temperature of heat flue gas produced by combustion, the amount of fuel used, and so on. Based on the above parameters, the heat consumption in the working process of the second dryer is calculated and the thermal efficiency of the drying cylinder is obtained. According to the calculation results, there is a certain lifting space for the lower thermal efficiency of the dryer. Based on the calculation of the temperature of the hot flue gas in each section of the dryer, the structural size of the dryer is calculated, which is basically consistent with the structural dimension provided by the dryer manufacturer, which verifies the rationality of the relevant calculation. According to the heat smoke temperature, the volume of old asphalt mixture in each section of drying tube is calculated, and the length of each section of drying tube is divided according to the volume. The temperature field in the second dryer and the temperature distribution of the cylinder wall in the second dryer of Oman 3000 forced intermittent asphalt mixture recycling equipment were analyzed by using the fluid analysis software Fluent, and the temperature distribution in the dryer and the cylinder wall was obtained. The variation of flue gas temperature in the direction of the drying tube axis is also obtained, which verifies the rationality of the division of the drying cylinder section. Finally, according to the field test carried out by the same type dryer manufacturer, The temperature distribution of the cylinder wall is verified to be consistent with the simulation results. By using the simulation software Matlab, the material curtain in the drying section is analyzed, and the temperature rise curve of the material is obtained by establishing the mathematical model of the material temperature rise, and the structure angle and installation angle of the blade in the drying area are obtained. It can be concluded that the optimal temperature rise curve should be obtained, which can guide the design of the optimum performance of the blade in the drying section and improve the thermal efficiency of the drying tube. In order to achieve the purpose of preheating and prevent materials from impinging on flame, the preheating section of dryer adopts box-shaped blades, which improves the thermal efficiency of the dryer.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U415.52
本文编号：2328402
[Abstract]:With the development of expressway in our country, the recycling of waste asphalt mixture has become the focus of more and more attention, so the hot recycling technology of waste asphalt mixture has become a hot spot. The second dryer is the key equipment of this regeneration system, and the thermal efficiency of the second dryer affects the energy consumption and production efficiency of the whole system. Moreover, the improvement of thermal efficiency is of great significance for energy saving and environmental protection. In this paper, the mechanism of asphalt pavement aging damage and old asphalt mixture regeneration is summarized, and the related situation of forced intermittent asphalt mixture hot recycling equipment, the main structure and production process of the equipment are briefly introduced. Based on the study of fuel combustion characteristics, this paper analyzes and calculates the parameters such as the amount of air needed and the amount of flue gas produced by fuel combustion, the temperature of heat flue gas produced by combustion, the amount of fuel used, and so on. Based on the above parameters, the heat consumption in the working process of the second dryer is calculated and the thermal efficiency of the drying cylinder is obtained. According to the calculation results, there is a certain lifting space for the lower thermal efficiency of the dryer. Based on the calculation of the temperature of the hot flue gas in each section of the dryer, the structural size of the dryer is calculated, which is basically consistent with the structural dimension provided by the dryer manufacturer, which verifies the rationality of the relevant calculation. According to the heat smoke temperature, the volume of old asphalt mixture in each section of drying tube is calculated, and the length of each section of drying tube is divided according to the volume. The temperature field in the second dryer and the temperature distribution of the cylinder wall in the second dryer of Oman 3000 forced intermittent asphalt mixture recycling equipment were analyzed by using the fluid analysis software Fluent, and the temperature distribution in the dryer and the cylinder wall was obtained. The variation of flue gas temperature in the direction of the drying tube axis is also obtained, which verifies the rationality of the division of the drying cylinder section. Finally, according to the field test carried out by the same type dryer manufacturer, The temperature distribution of the cylinder wall is verified to be consistent with the simulation results. By using the simulation software Matlab, the material curtain in the drying section is analyzed, and the temperature rise curve of the material is obtained by establishing the mathematical model of the material temperature rise, and the structure angle and installation angle of the blade in the drying area are obtained. It can be concluded that the optimal temperature rise curve should be obtained, which can guide the design of the optimum performance of the blade in the drying section and improve the thermal efficiency of the drying tube. In order to achieve the purpose of preheating and prevent materials from impinging on flame, the preheating section of dryer adopts box-shaped blades, which improves the thermal efficiency of the dryer.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U415.52
【参考文献】
相关期刊论文 前6条
1 吕太,张墨,张玉峰,徐建伟,张增山;粉煤灰转筒干燥装置实验研究[J];粉煤灰综合利用;2003年04期
2 田晋跃;翟云峰;程一鸣;杨宝林;;再生沥青拌合烘干滚筒的温度场数值模拟[J];中国工程机械学报;2007年03期
3 田晋跃;小型沥青再生拌和机滚筒运动参数分析[J];工程机械;1994年04期
4 胡艳和;陈飚;黄洪涛;薛涛;刘涛;;沥青搅拌站骨料烘干加热热工学分析计算[J];建设机械技术与管理;2006年10期
5 姜涛,邢军;LQB-3000型沥青混合料搅拌设备烘干筒的设计[J];筑路机械与施工机械化;2002年02期
6 栾兆学;王太民;马文慧;;沥青混合料拌和设备加热滚筒提料板结构分析与改进[J];筑路机械与施工机械化;2007年04期
相关硕士学位论文 前4条
1 张文会;沥青路面厂拌热再生技术研究[D];长安大学;2004年
2 张昌波;沥青混凝土厂拌热再生技术研究[D];长安大学;2006年
3 邢宁宁;基于Fluent软件模拟水泥分解炉热工过程[D];济南大学;2012年
4 季晗豪;新型旧沥青混凝土回收料干燥加热装置设计[D];长沙理工大学;2013年
，本文编号：2328402
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2328402.html
