|ICESP X CONFERENCE PAPER ABSTRACTS 4B SERIES
Held in Cairns,
Conference on Electrostatic Precipitation (ICESP)
is the official conference of the International Society for Electrostatic
V. ARRONDEL, G. BACCHIEGA, N. CARAMAN, I. GALLIMBERTI, M. HAMLIL, D. JACOB AND A. RENARD.
Either in the Operation Control Room, the Handling/Logistics Department, the MaintenanceDepartment…or even in the Environmental Section, the operating personnel can contribute to control the dust emission of a power plant unit.
To satisfy current regulations, the efficiency of the electrostatic precipitator must always be mantained greater than 99.5%. These high performances require continuous control of the impact of possible malfunctions on the emission level, by adjusting the process conditions from the coal yard to the stack, including the electrostatic-precipitator itself.
To evaluate quickly the impact of coal characteristics, combustion parameters and electricalmalfunctions on dust emission the operator can use a user-friendly software based on physical modelling of the dust collection process: ORCHIDEE. Without using experimental databases or manufacturer's empirical data, the operator becomes able to get a better real time understanding of the problems, and to react efficiently.
Version 2 of ORCHIDEE software offers additional functions, based on the non-linearcoupling of different effects (ash layer chatacteristics, particles resistivity, current and voltage rapping processes, etc.)
By proper introduction of all input data, ORCHIDEE 2 makes possible:
Øto evaluate the impact of combustion parameters on dust emission (excessive airleakages, flue gas temperature at precipitator inlet).
Øto test blending hypotheses of various types of coal to avoid back-corona.
Øto evaluate the impact of rapping sequences or SO3 injection on dust emission.
Øto simulate electrical malfunctions: field or section out of service, wire and plate fouling, electrode misalignment, etc.
Øto evaluate the impact of back-corona on precipitator efficiency and voltage-current characteristics.
Validated with industrial precipitators data, ORCHIDEE is a very helpful tool to assistoperation and maintenance of electrostatic filters. It is unique for its high scientific content and its user-friendly interface, and it has already shown to fulfil the expectations of industrial users.
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The thesis hammered at the study on simulation of Economize on Energy & Optimize control system forElectrostatic Precipitator (ESP). To get the highest efficiency, namely the lowest dust discharging concentration, the software can automatically select different controlling style and electric-field characteristics according to different working stations. Based on simulation of distributed control system of ESP and a series of established mathematic models, the software can finally find best controlling style after a series of analyses. In the light of optimize control theory, this simulation= software of Economize on Energy & Optimize control system for ESP was developed. The software can run independently on distributed control system of ESP. A large number of simulation experiments manifested what is followed: the simulation software have a good man-machine interface and simple operation; the expected goal of optimize control was achieved, at the same time energy was economized. It can make great importance and reference on development of ESP-control software and improvement of ESP power supply control.
Last updated: May 10, 2009.
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