[优秀论文]粉末活性炭干式投加装置自动控制系统研究.pdf

上海交通大学
硕士学位论文
粉末活性炭干式投加装置自动控制系统研究
姓名:胡侃
申请学位级别:硕士
专业:机械工程
指导教师:刘利;庄星宇
20091201
上海交通大学工程硕士学位论文摘要
粉末活性炭干式投加装置自动控制系统研究
摘要
粉末活性炭是一种重要的水处理药剂,对水中污染物具有很强的吸
附能力,常用于饮用水源受到污染时的应急处理,然而在国内水资源环
境遭破坏严重,而社会各界对饮用水水质要求越来越严的背景下,其使
用日益频繁,有些地区甚至已成为一种常规水处理药剂。为此,论文对
粉末活性炭干式投加装置自动控制系统进行了深入研究。
活性炭水处理过程影响因素众多,具有大滞后、非线性、时变特点,
难以按传统控制方法实现投加量自动控制。为此,本文另辟蹊径,采用
带有人工智能特色的模糊控制方法,设计了根据原水流量、嗅味、耗氧
量及其变化速率自动调节变频器频率,控制活性炭投加量的模糊控制
器。试运行数据表明:采用模糊控制技术不仅水质控制效果理想,而且
节约炭耗达 30%。另外,论文还针对原装置料位控制和水射器堵塞处理
完全依赖人的主观性的不足,研制了以阻旋开关、电容式接近传感器、
PLC 为核心的料位自动控制、水射器堵塞应急自保及自动恢复系统,彻
底消除了制约该套设备实用性的瓶颈因素,使得设备运行更加稳定可
靠,确保了水质安全,同时还大大降低了工人劳动强度,深受一线操作
人员欢迎。
关键词:粉末活性炭,干式投加装置,自动化,模糊控制,传感器
III
上海交通大学工程硕士学位论文 ABSTRACT
STUDY ON THE AUTOMATIC CONTROL
OF PAC DRY-TYPE DOSING DEVICE

ABSTRACT

PAC(Powdered Activated Carbon) is one of the important water treatment
has very strong adsorbability to water pollutant and is often used in the
contaminated raw water. Now PAC is used more widely because the environmental
pollution and the people’s higher reguirements for the drinkwater. In some regions it has
even been daily used in water supply this thesis studied in the
automatic control system of the PAC dosing device deeply.
The PAC purification process is affected by many factors and the process is also a
big time-delay, non-linear and uncertain system. So it is difficult to control by traditional
control approaches. Creativley this thesis chose a new way of Fuzzy Control which has
some characteristics of artificial intelligence. Based on the raw water parameters which
are flow,odor,CODMn and the change rate of CODMn the Fuzzy Controller adjusts the FC
(Frequency Changer) to get a best PAC dosage. It is proved by the test run that not only
the water quality is controlled better than ever but also the wastage of PAC is decreased
for more than 30% by using the Fuzzy Control old device is highly
dependent on the worker