Manufacture And Development On On-line Monitor System For Primary And Secondary Air Speed Of Boiler In Power Plants

So far,combustion monitor methods for domestic units are out of date with many reasons. As an important parameter to design and to guide boiler's combustion adjustment,the primary and secondary air speed of boiler have not realized real-time and precise measurement. Combustion adjustment for boiler of power plants is on blind and semi-blind status. This condition directly influences safe and economic operation of boiler. This paper particularly analyzes the problem's status from the theory with the practice angle,by being introduced the manufacture process of the on-line monitor system for primary and secondary air speed of boiler,and puts forward an effective way to solve this problem.First of all,this paper analyses present problems existing in the boiler combustion monitor system of power plants,then put forward the signification to realize precision measurement for the primary and secondary air speed of boiler and the necessary conditions to solve efficaciously this problem. Aiming at the structure characteristics of the pipeline system of the existing boiler combustion equipment,the paper work out the new-style air speed measure components via the theory analysis of the existing measure components of all kind of forms and measure theory. And then the paper designs and builds the wind tunnel test-bed to process the test and research of the air speed measure components in order to realize it's structure and each characteristic parameter. Finally to accomplish the development of air speed measure componentsBeing based upon above discussion,the paper chose rationally hardware equipments,such as the tiny pressure difference sensor,the data collection system,the industrial control computer etc,solved the communication interface problems of the hardware platform,compiled the system software of the air speed on-line monitor,and raveled out a series of technical problems about the signal real time conversion,transfer,modify,calculate,display and so on. The purpose is to establish a integrated on-line monitor system for primary and secondary air speed of boiler in power plants.Subsequently,the paper introduced the applied instance of the on-line monitor system in the industry location. On the basis of the practice status of the boiler,a suit of integrated air speed on-line monitor system was installed after completing the relative design and reconstruct work. And then,accomplished the boiler tests under the cold and the thermal states in order to ensure and estimate the practice effect. At the end of the paper,it put forward the prospect on the more development of the theme.