| 摘要 |
<p>PURPOSE:To reduce installation cost and operating cost of the subject equipment by feeding paint solvent containing exhaust from a painting booth to the painting booth by circulation to increase the concentration of the paint solvent in the exhaust, shunting part of the circulated exhaust to burn the paint solvent of high concentration for cleaning it and regulating the shunted exhaust flow so that the paint solvent vapor concentration in the shunted exhaust may be the specified one. CONSTITUTION:As a means of enriching the paint solvent concentration, exhaust circulating means 23, 24 of feeding paint solvent containing exhaust Ae discharged from a painting booth 4B to the painting booth 4B by circulation are provided. Part of the exhaust Ae circulated by the exhaust circulating means 23, 24 is shunted into a shunted exhaust route 26 to feed it to combustion equipment 25. In addition, replenishing means 3, 20, 21 replenish ventilating gas As whose quantity is nearly equal to that of the shunted exhaust Qb into the shunted exhaust route 26 to the painting booth 4B. The ratio of the shunted exhaust quantity Qb into the shunted exhaust route 26 to the exhaust quantity Q from the painting booth 4B ranges in the paint solvent concentration in the shunted exhaust Aee from 1000 to 2500ppm. As a result, the installation and operating costs of the subject equipment are reduced.</p> |
