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Yes, there is. The out-going press moisture can be determined from a mass and energy balance of the dryer section. By knowing the paper weight, width, speed, and reel moisture and the amount of steam used for drying, the out-going press moisture can be calculated using an analytical model of the dryer section. This is much simpler than a water balance that requires accurate measurement of many water flow rates around the press section. It is also much safer than attempting to get a "grab" sample of the sheet on the front side of the press section. It is also less costly than a cross-machine moisture scanner. And the result is more accurate than all of these alternatives. For a "tight" well-managed dryer steam system, the sheet dryness can be determined within 0.1-0.2 dryness percent.
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(News from RISI) – Suzano Pulp and Paper has signed a $58 million order for two tissue paper machines (PM) to be installed at the company’s Mucuri and Imperatriz mills in northeast Brazil.
Each PM will have capacity to produce 60,000tpy and Suzano expects to start construction in May.
Tissue production is expected to start-up at Imperatriz in the third quarter of 2017 and at Mucuri in the fourth quarter of the same year.
Both mills will produce jumbo rolls to be supplied to toilet paper converters in the northeast region of Brazil.
Yes, there is. Rather than measuring the amount of steam that you use, measure the amount of steam that you lose. The steam consumption (amount of steam used per hour) is, by itself, an inadequate measure. A high value could be the result of either drying a lot of paper or venting a lot of steam. One is good. The other is bad. Indexing the amount of steam used with amount of water evaporated (pounds of steam per hour per pound of water evaporated) is a better metric, but significant amount of energy can easily be lost in the "noise" of this metric.
A better approach is to simply look for the steam losses. Specifically, look for steam that is vented to the atmosphere or vented to condenser tanks. Look for condensate that is dumped to a sewer and look for hot air that is exhausted from the dryer hood to the atmosphere. These are direct measurements of energy losses and they are direct indications of potential areas for energy recovery.