#5 Paper Machine Dryer : Energy Saving Introducing High Dew Point Enclosed Hood System

Abstract

Oji Materia Co., Ltd. Edogawa Mill is only one white board paper production plant in Tokyo metropolitan area that is located in the eastern end of this capital city. This plant has significant geographical advantages. It can be easily gathered abundant of waste paper and is also very close to the vast market.
The Edogawa Mill is running to produce white board paper with company’s theme of “Living together with people & local communities there”. In this plant, #5paper machine has started full production in May 1971 as specialized making white board paper. Current production is about 130,000 tons per year and the products are mainly delivered to the paper container industries.
The dryer part out of the whole paper production process is the most energy consuming section and considered it most effective for energy saving if it can be modified appropriately. However, such modification work for the dryer part including hood system had not been realized in the past due to possibly vast investment.
Now, we have carried out renewal of both the dryer hood and the air supply⁄exhaust equipment which has enabled to achieve the saving of steam and electricity. We would like to hereby explain an outline of the modification of the dryer hood system and also describe how energy saving effects was attained with it.