| How to improve working efficiency, use the energy reasonably and minimize energy waste in maximum extend in engineering practice, have been the most important subjects in today’s world. Integrating multiple sensors and using inverter control technology become the effective means to save energy for the heavy industry enterprises. The background of this thesis is based on the reform of the de-dusting energy-saving system of Changzhi Iron and Steel Plant, which belongs to Shougang Group. And the design and transforming of the system, and the research and application of the relevant technologies have been completed on this thesis. In addition, comprehensive research and discourse of de-dusting fan energy-saving system based on multi-sensor combined with frequency conversion technology have been made, and meanwhile, many innovative achievements have been achieved. The main work of the thesis is detailed as follows:(1) Laser dust sensor has been designed and made, in consideration of the actual environment of Iron and Steel Plant. In order to meet the demand of measuring the dust concentration, the light which the wavelength is about550nm and in the red band is adopted. Then this laser dust sensor could monitor the dust concentration by the use of its optical sensing property, and finish the collection of field data. The real-time control of the speed of fan and the purpose of saving energy are achieved, through the setting of the equipment parameters and the collected data threshold of Laser dust sensor. Meanwhile, the temperatures of every phase while the iron being out of furnace are got through infrared temperature sensor’s monitoring. Then they are used to be compared with the data threshold which was set by the controlling program, to get the real-time control of de-dusting fan’s frequency. In addition, the safety control coefficient is highly improved by combining monitoring of the live environment with some multi-angle video equipments. Finally, a multi-sensor system is built by integrating laser dust sensor, infrared temperature sensor and multi-angle video equipments.(2) The design and manufacture of the hardware of de-dusting energy-saving system are finished, which belongs to Iron and Steel Plant, by using center central system, high voltage inverter and multi-sensor system. On the other hand, the equipments are optimized, benefit from the using of electronic chips, electronic relays, data acquisition card and so on. This could stand the effects from the complex production environment of Iron and Steel Plant, and get the application of this kind of de-dusting energy-saving system.(3) The de-dusting energy-saving system is based on the virtual instrument technology module. This thesis designs and finishes the control program on LabVIEW platform which could control all the spot in the system. Meanwhile, a concise impeccable operation interface is designed to realize the automation control of manufacture. The serial communication established in the control program, guarantees the bi-directional date transmission between the control program and the hardware equipment, and realizes the purpose of combining the hardware with the software.(4) The de-dusting energy-saving system has already been used in the production and functions very well. It realizes the intelligent automation of the production control, and changes the old de-dusting mode. Also, the production efficiency is highly improved. The data displayed by this system indicates that the system designed in this thesis has perfect energy saving effect, while the long-term use of it. The power-saving rate of it is as highly as60%, and the cost is also saved. The work of this research has positive significance for the improving of energy-saving technology and the popularization of energy saving. |
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