July online exclusives.

This is the latest installment of "Online Exclusives," an integrated print/Internet publishing venture. This section features articles published on-line in the Solutions! section of www.tappi.org and excerpted in the print edition of Solutions! We will be adding new titles to the Online Exclusives section each month. To browse the table of contents, go to www.tappi.org, click on the Solutions! link (the S!), then click on "Online Exclusives."

In July, you can access the following features:

"Trends and Ideas" (sea page 14)

"Winder trimming: A case study," by L.R. Roberge and B. Doutre

Weyerhaeuser's paperboard mill in Sturgeon Falls Ontario had a difficult winder trimming problem. The mill's one paperboard machine accepted trim and the accompanying motive air from two sources--the winder and a web welder. The pulper was not equipped with an exhaust system and consequently some of the moisture laden paper fragments from the chopping operation would exit the operating floor pulper opening with the excess air. The wet paper fragments would settle on the operating floor, creating a safety hazard. Paper fragments on the operating floor also became a housekeeping issue.

The machine crew and management needed a solution that would not jeopardize the trimming operation, create more work for maintenance crews, consume more power, or increase the noise level in the machine room. The mill also wanted to speed tip the winder by 1000 fpm.

The mill decided to replace the existing trim conveying system with a vacuum trim handling system that would eliminate the introduction of air into the pulper altogether. The mill installed a BERVAC system from EPM Tech Ltd. With this system in place, the trim (conveyed under vacuum conditions) enters the pulper below the liquid level through an air-lock seal. This eliminates the possibility for paper trim blowouts.

Onsite power. A reliable, cost-effective alternative, by Ken Peters, Vericor Power Systems LLC 

Deregulation within energy markets has opened novel applications for proven technology. These new opportunities are available to all types of energy users, allowing them to take control of future energy needs and costs. With preplanning and an eye on the future, many existing industrial, commercial pharmaceutical, toed processing, pulp and paper, wood processing or other energy-using facilities have the potential to benefit from an onsite power system at their location. This system may be owned by the host company or owned and operated by a third party. The result is stabilization of current energy costs, improved quality of power and better control over future energy costs.

This article defines onsite power, looks at available technologies. examines if an onsite power unit is right for your mill, discusses sizing of the unit, and looks at various ownership options.