To achieve processing for purification of exhaust of hot air produced as printing paper is dried in which a supply flow rate of the exhaust is controlled according to the concentration of solvent steam of the exhaust, and the control is not made complicated.
In a method of drying printing ink as the printing paper travels in hot air in a drying chamber, so that the solvent steam of the printing ink is produced, supplying the exhaust of the hot air including the solvent steam in the drying chamber to a catalyst oxidation device so as to pass the exhaust through an oxidation catalyst, and thereby deodorizing the exhaust through oxidation reaction, a range in which the temperature of the exhaust having been passed through the catalyst is divided in three, i.e. a low-temperature range, an intermediate-temperature range, and a high-temperature range. While the temperature of the exhaust having been passed through the catalyst is within the low-temperature range, the supply flow rate of the exhaust is set to a constant value at a lower limit of an increase/decrease range thereof. While the temperature of the exhaust having been passed through the catalyst is within the high-temperature range, the supply flow rate of the exhaust is set to a constant value at an upper limit of an increase/decrease range thereof. While the temperature of the exhaust having been passed through the catalyst is within the intermediate-temperature range, the supply flow rate of the exhaust is increased/decreased continuously and linearly between an upper limit and a lower limit of an increase/decrease range thereof according to the temperature of the exhaust having been passed through the catalyst.
KONDO TOMOYUKI
KANEHARA FUTOSHI
KONDO KOGYO KK
| JP2006192652A | 2006-07-27 | |||
| JP2009056702A | 2009-03-19 | |||
| JPH04305455A | 1992-10-28 | |||
| JP2006192652A | 2006-07-27 |