Study And Application On Improving Dust Collection Efficiency Of Electrostatic Precipitations In The Cement Plant

In 2003, the cement production of our country amounted to 800 milliontons, which up to now was the largest output of cement of the countries in theworld. Dust has been easily produced at many places in a cement plant, which,if not controlled would cause many hidden dangers to the health of theworkers; Especially, occupational diseases such as silicosis disease would becaused by activated produced from mine and now material polish systems. Ifthe dust has fallen on the machine, it would quicken the wear and tear of allkinds of works, would shorten the life span and running rate of the instrument,and would reduce precision and reliability of the controlling instrument; Ifthere was much dust in the buildings, the shoulder would increase and theoutward appearance would be affected; If crops were polluted by dust, theoutput would be reduced. If dust were not retrieved , if would increase theconsumptions of raw material,fuel and motive power. On the basis ofstatistics, the content of dust in the production of cement is about 6 to 12percent. These show that doing well in the sucking up work of cement plantshas very important meaning for protecting people's healthy, improvingproduction efficiency, reducing production cost and protecting ecologyenvironment. Research Methodology The research methodology is on the basis of dust removing efficiency ofelectricity dust remover is largely influenced by the physical properties andother factors of dust, especially the influence of dust proportion – resistance ismore protruding, the dust – removing efficiency for the dust remover in manycement plants appears unstable. How to make the electricity dust removerrunning with stability and with high efficiency is a throughout unsolvedtechnical problem in many cement plants. The research thought theoreticallythat the main factors influencing the dust – removing efficiency of electricitydust remover of cement plants were: volume and velocity of flow of dust gas, 58英 文 摘 要consistency of dust, proportion – resistance of dust, temperature of gas,humidifier, homogeneity of the air current distribution, structure of the dustremover and etc. The main methods to improve dust removing efficiency of the electricityprecipitation in cement plants include: handle the smoke with modulationadopt spraying to increase humidifier, add in chemical additives, reduce ratioelectric resistance of dust, so as to fit the work of electricity precipitation;Change the way of supplying electricity of electricity precipitation, adoptsome new structures of the electricity precipitation; When the dust gasevolved in cement polish is treated with electricity precipitation, its platewould receive hit of smoke thus emerging serious corrosion on the surface ofthe metal, so the plate must be made from the high grade carbon steel with nosilicon in it, and it mast decrease the possibility of precipitation leak air whendesigning its structure; For the decreasing phenomenon of dust – removingefficiency of the electricity precipitation owing to electricity seal, one wouldadopt the second many of removing dust to solve, reduce the dustconcentration in the entrance of electricity precipitation, and before the dustgas comes into the electricity precipitation, it must be pretreated by passingthe precipitation of whirlwind or other dust – removing instruments so as toreduce consistency of dust of electricity precipitation; The precipitation shouldbe in a state of minute negative pressure to work to decrease leak air rate ofelectricity precipitation; The shell of steel structure should adopt soldercontinuously when the steel plate is set up, it should adopt the way ofkerosene permeate to check up the airtight of welding seam, and anyunqualified part has to be soldered again. The inspection door on the shellairtight layering has to employ the good heat – resisting silicate, there is heatpreservation lined store...