[1]王丽花.基于热管的污泥干化尾气余热回收技术研究[J].中国给水排水,2022,38(17):112-116.
　WANGLi-hua.Waste Heat Recovery of Sludge Drying Exhaust Gas Based on Heat Pipe[J].China Water & Wastewater,2022,38(17):112-116.
点击复制

基于热管的污泥干化尾气余热回收技术研究

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第38卷 期数: 2022年第17期 页码: 112-116 栏目: 出版日期: 2022-09-01
Title:
Waste Heat Recovery of Sludge Drying Exhaust Gas Based on Heat Pipe
作者:
王丽花
（上海城投污水处理有限公司，上海 200233）
Author(s):
WANG　Li-hua
（Shanghai Chengtou Wastewater Treatment Co. Ltd.， Shanghai 200233， China）
关键词:
污泥干化;  低温重力热管;  尾气余热回收
Keywords:
sludge drying;  low temperature gravity heat pipe;  waste heat recovery from exhaust gas
摘要:
采用低温重力热管对污泥干化尾气余热进行回收，以实现对80 ℃左右干化尾气的余热利用。首先针对上海某污泥干化焚烧工程研究了热管回收干化尾气余热的工艺方案，确定了热管换热器的设计方法。然后在工程现场进行了试验，从实际工程中的干化机抽取尾气（流量为200 m3/h）进行余热回收。试验结果表明，热管蒸发段干化尾气从81.1 ℃下降到50.7 ℃，换热后新风温度从31.3 ℃升高到69.5 ℃，其流量可达2 384.2 m3/h，有效避免了能量浪费。根据现场试验结果，热管的传热系数为79.99 W/（m2·℃），热损失为4.5%。可见，采用低温热管回收污泥干化尾气余热工艺可行，且效果良好。
Abstract:
The waste heat of sludge drying exhaust gas was recovered by low temperature gravity heat pipe, so as to realize the waste heat utilization of sludge drying exhaust gas at approximately 80 ℃. Firstly, the process scheme of heat pipe recovering waste heat from sludge drying exhaust gas was explored based on a sludge drying and incineration project in Shanghai, and the design method of heat pipe heat exchanger was determined. Then, a field test was carried out, and the exhaust gas (flow rate of 200 m3/h) was extracted from a dryer of an actual project for waste heat recovery. The sludge drying exhaust gas in the evaporation section of the heat pipe decreased from 81.1 ℃ to 50.7 ℃, the temperature of fresh air increased from 31.3 ℃ to 69.5 ℃ after heat exchange, and the flow rate reached 2 384.2 m3/h, indicating that the heat pipe effectively avoided energy waste. According to the field test results, the heat transfer coefficient of the heat pipe was 79.99 W/(m2·℃), and the heat loss was 4.5%. Therefore, it is feasible and effective to apply low temperature heat pipe to recover waste heat from sludge drying exhaust gas.

相似文献/References:

[1]刘勇.城市生活污泥干化焚烧工程调试与试运行[J].中国给水排水,2021,37(6):117.
　LIU Yong.Commissioning and Trial Operation of a Municipal Sludge Drying and Incineration Project[J].China Water & Wastewater,2021,37(17):117.

更新日期/Last Update: 2022-09-01