|ICESP X CONFERENCE PAPER ABSTRACTS 2B SERIES
Held in Cairns,
Conference on Electrostatic Precipitation (ICESP)
is the official conference of the International Society for Electrostatic
M. JEDRUSIK, A. SWIERCZOK
This paper describes experimental test results of selected discharge electrode configuration on ESP fly-ash collection derived from boilers fired with coal and biomass mixtures. According to the new Polish Energy Law energy sector should increase its renewable energy quota up to 5,75% by the end of 2010 year. A new specific type of the after-combustion product should be efficiently collected within the ESP. To estimate the new precipitationís process parameters, series of test were carried out on a bench scale ESP model collecting fly ashes coming from utility boilers fired with lignite and lignite-biomass mixtures. The physical model had active field length of 2 x 1000 mm and 450 mm height with a gas duct spacing of 400 mm. The main goal of the experimental investigation was to assume the dependency of ESP collection efficiency on discharge electrode type, especially when collecting fly-ash generated in utility boilers fired with coal-biomass mixtures. The investigation takes into account the chemical and physical characteristic parameters of the fly ash as well as the mercury content in fly ash as a function of particle size distribution.
The results has been presented in the form of tables and curves showing the influence of electrical energization, fly ash chemical and physical specific properties and discharge electrode configuration on the total collection efficiency of an ESP.
K.YASUMOTO, A. ZUKERAN, T. KIMURA, K. ITO, K. YUDA,Y. TAKAGI** AND Y. EHARA
One application of an
electrostatic precipitator (ESP) is decontaminating polluted gases in
expressway tunnels to save drivers and environment around tunnels.
High collection efficiency is well achieved by a conventional ESP.
However, the walls downstream the ESP are polluted due to particle
deposition. Although it was thought that the cause was the emission of
charged particles from the ESP, authors thought that one of the causes
was also particle re-entrainment on the ESP. In this paper, the
experiments were carried out to investigate the effect of
neutralization on preventing particle deposition. The collection
efficiency as a function of particle diameter and the amount of
deposited particles on the wall were studied on three types of the
ESP, which were the universal ESP under DC operating mode (DCESP),
the ESP under AC operating mode (ACESP) and the ACESP with
neutralization. The ACESP is new type that is developed to prevent the
particle re-entrainment by authors. The results showed that the
collection efficiency of a large particle decreased on the DCESP
because of the particle re-entrainment. Although the amount of
deposited particles on the DCESP was the greatest, that on the ACESP
was low due to preventing particle re-entrainment. The ACESP with
neutralizer was most effective to decrease the amount of deposited
particles of three types of the ESP, because of the preventing
particle re-entrainment and the decreasing the charge amount of gases
downstream the ACESP with the neutralization.
TANG MINKANG AND LUO SIWEN
phenomenon of the charged smoke particle has been investigated by
the electric- fluid mechanics and transport theory of external force
field and depending on several simplifying assumptions the
theoretical expression for the agglomeration rate of the smoke
particles has been developed. In a model of electrostatic
precipitator the agglomeration mechanism of charged particles has
been studied further. It is shown that the agglomeration of the
charged smoke particles are affected by charge distribution on the
surface of particles, particle size and charge polar of particle,
particle charges and so on. No matter single polar corona or bipolar
corona the agglomeration of smoke particles will take place but the
agglomeration occurring between particles with negative charges and
particle with positive charges will be limited within a certain
Last updated: May 10, 2009.
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