| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a dry process electric dust collector from being an excessive design at a normal rated operational time and also to prevent concentration of soot and dust at the outlet of the dust collector from being over a regulated value at the overshoot time. SOLUTION: A gas flow passage 4 consisting of plural numbers of chambers arranged in parallel is provided in the dry process electric dust collector 2, and the gas flow passage 4 is provided in excessive one chamber for hammering a dust collection electrode plate, besides the gas flow passage group provided with a space corresponding to the rated gas flow rate at the normal operation time. At the hammering time of the dust collection electrode in the rated gas flow rate time at a periodical normal operation time of respective chambers, a gas flow in the gas flow passage 4 of the excessive one chamber is shut down and exhaust gas of the rated flow rate is subjected to a dust collection treatment without any trouble by utilizing other whole chambers, and in the case that the gas flow rate is over the rated gas flow rate in the overshoot time in a load increasing process of a combustion device, the exhaust gas is introduced to the whole chambers of the gas flow passage 4 including the excessive one chamber to collect the dust, and during this time the periodical hammering of the dust collection electrode in the whole chamber is not performed.</p> |
