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WORLD PULPPAPER 37 Notes Kim Jinhong Representative Director Oh Yang Patech Co. Ltd. for AFT The fact that the POM wet end saved capital by eliminating the need for seal pits silos and chests is a great starting point. Best of all however is better process stability and quicker response to control changes. BUBBLE TROUBLE With the traditional approach system more had to be done in wastewater treatment which meant a focus of time and higher use of chemicals. Lots of bubbles in the whitewater and wastewater treatment often call for an overload of defoamers. Changing over to the POMp degasser however meant that the entrained air reduction of about 70 eliminated much of the foam without chemicals. With less demand on the wastewater system we have more time to focus on other important issues says Lee Dai Young. Now we use about half the defoamers that similar mills employ in Korea. WATER USE DROP DRAMATIC Lee Dai Young being a strong advocate for simplicity suggests that lower water consumption is fundamental to the productivity and quality gains. Fewer problems happen when tanks are gone. Contaminants and deposits dont have a chance to build up as they did before. A closed system with less entrained air is also easier to clean. Water volume was decreased by over 50. More importantly all of the problems that are created because of huge water volumes and what grows in various tanks became history. He continues As you decrease water use you can control better. You make adjustments faster. Your good ideas are not diluted in the vast liquid volume which you dont need. FREQUENT GRADE CHANGES To satisfy a wide range of customers Korea Paper makes frequent grade changes which include colour and grammage changes. The normal procedure is step by step but now dramatic changes are possible in a short period of time. Sometimes an important customer needs a particular With the traditional approach system more had to be done in wastewater treatment which meant a focus of time and higher use of chemicals Figure 4. Kim Jinhong left Representative Director Oh Yang Patech Co. Ltd. for AFT with Keiji Yasuda small space. Korea Paper saved capital by eliminating the need for seal pits silos and chests. Best of all the compactness led to better process stability and quicker response to control and grade changes. grade with very short turnaround time adds Ryu Jin Ho. Because of our smooth and flexible operations we can respond quickly when it matters. The POM system takes away a lot of stress and gives us a new advantage. Grade change time is faster because thick stock and white water systems purge quickly. Figure 5. Greater control is now the norm with a simpler wet end approach