Inorganic Chemicals Industry >
A new device for utilizing waste heat from calcination tail gas of titanium dioxide rotary kiln
Received date: 2019-08-12
Online published: 2020-02-26
The characteristics of high humidity,high sulfur and high acid dew point of calcination tail gas of rotary kiln of titanium dioxide shortens the life of metal heat exchanger.On the basis of summarizing the existing problems of the previous waste heat utilization methods of the rotary kiln tail gas,a long-life and easy-to-maintain bushing heat pipe waste heat utilization device was presented.The device is made up of separate heat pipe bushings connected by inner pipe elbows and flanges.The calcination tail gas crosses the double-layer heat pipe bushings vertically,and heat is transferred from the calcination tail gas to the heating medium through the phase change of the phase change medium.Then the steam required by the production of TiO2 was obtained.Compared with single-layer gravity heat pipe heat exchanger,the bushing heat pipe exchanger life span of the double-layer tube is obviously prolonged; the elbow of the single-layer tube connecting the heat pipe bushings does not contact with calcination tail gas,which greatly reduces the corrosion to the single-layer pipe.The bushing heat pipe heat exchanger is used in the 3.6 m×58 m titanium dioxide calcining kiln,it can produce 11.2 kt annually water vapor with 0.9 MPa pressure,brings enormous economic benefits to enterprises.
Zengli Gao , Qiuhong Li , Huaquan Li , Hongyu Bi . A new device for utilizing waste heat from calcination tail gas of titanium dioxide rotary kiln[J]. Inorganic Chemicals Industry, 2020 , 52(2) : 75 -77 . DOI: 10.11962/1006-4990.2019-0180
[1] | 唐文骞 . 钛白生产中转窑煅烧工序节能技术的探讨[J]. 化工设计, 2010,20(4):33-35. |
[2] | 唐文骞 . 钛白生产中先进节能技术应用的探讨[J]. 无机盐工业, 2008,40(7):37-39. |
[3] | 宋志刚, 陈燕, 倪俊 . 硫酸法钛白粉生产能耗分析与降耗对策[J]. 能源研究与利用, 2014,( 2):50-52. |
[4] | 崔宁 . 钛白生产中转窑煅烧工序节能技术的探讨[J]. 化工管理, 2015(1):169-170. |
[5] | 姜森, 刘全, 辛曲珍 . 余热锅炉的酸露点温度计算[J]. 黑龙江电力, 2002,24(4):314-316. |
[6] | 陈文娟, 戴建军 . 钛白粉煅烧尾气处理工艺改进及余热利用的研究[J]. 无机盐工业, 2009,41(4):52-54. |
[7] | 郭焦星 , 采用煅烧尾气及天然气等热源浓缩钛白废酸的工程设计及计算[J]. 工业加热, 2014,43(4):4-8. |
[8] | 刘小平, 彭友谊, 王雅伦 等. 钛白尾气余热回收新技术[J]. 无机盐工业, 2015,47(3):42-44. |
[9] | 李古鹏 . 煅烧尾气余热回收节能项目介绍[J]. 宁波节能, 2017(2):33-34. |
[10] | 彭瑞 . 复合相变换热技术在焦炉烟气余热回收中的应用[J]. 化学工程与装备, 2013(11):2-5. |
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