Quick-dry Partial Vacuum System

PDF Publication Title:

Quick-dry Partial Vacuum System ( quick-dry-partial-vacuum-system )

Next Page View | Return to Search List

Text from PDF Page: 001

Kiln Upgrade Case Study: Turn-of-the-Century Brick Kilns replaced with a Quick-dry Partial Vacuum System at Steinway & Sons Ryan Bossis, ERS Bill Rigos, Steinway & Sons ABSTRACT Piano manufacturer Steinway & Sons is currently in the process of upgrading the aging kiln system at their American production facility in Astoria, Queens, New York. Because the pianos require tight tolerances for wood board moisture, the drying process for the raw wood purchased by the facility must be carefully controlled. The existing process uses the plant’s original turn-of-the-century brick masonry kilns. Although the structures are sealed, insulated, and well maintained, the process is inherently inefficient. Low-pressure steam – both live steam injection and dry heat via steam coil – is used as a heat source. Ventilation dampers are used to discharge warm air and humidity periodically, resulting in high thermal losses. Depending on the wood type and product specifications, the cycle of steam injection and ventilation can last for up to 5 weeks, compared to only 4-5 days with the new kilns. The kilns are being replaced by partial vacuum kilns which create a partial vacuum, reducing the heating requirements and increasing the speed of moisture removal. Heating inputs are so low that hot water can be used in place of steam. This presentation will provide a walk-through of the design, installation, and commissioning process of installing the new system. It will focus on the “lessons learned” and challenges through each stage of the process, beginning with the retrofit options and the decision tree leading to the switch to the partial vacuum system. The various design options and heat sources will also be discussed. Introduction Steinway & Son’s (Steinway) is a piano manufacturer with production facilities located in Astoria, Queens, New York, and Hamburg, Germany. The piano making process is complicated and requires exacting precision and finesse. However, at times, technology can supplement and enhance even the most time-trusted production methods, and changes are needed for Steinway to remain at the forefront of a competitive industry. One such advancement currently being implemented at Steinway’s Astoria campus is a replacement of the century-old kiln-drying process. All wood used by Steinway for manufacturing must be conditioned within certain moisture content tolerances to ensure proper assembly and prevent shrinking or warping of the pianos as they age. Due to capacity constraints and the challenges faced with the existing equipment, wood arrives either green or pre-dried (at an off-site kiln facility). The green wood must be dried in one of four aging traditional brick kilns. Two of the kilns are shown in Figure 1. The kilns measure approximately 20 × 20 feet and are 25 feet high. 1

PDF Image | Quick-dry Partial Vacuum System


PDF Search Title:

Quick-dry Partial Vacuum System

Original File Name Searched:


DIY PDF Search: Google It | Yahoo | Bing

5,000 BF Shipping Container Lumber Dry Kiln For Quality Lumber The 5,000 BF container kiln consists of one 40 foot high-cube aluminum shipping container... More Info

Shipping Container Lumber Dry Kilns by Global Energy Global Energy designed and developed the container kiln back in 1991. The purpose is to give access to portable sawmill owners, furniture makers, and small business the value added profit of dry kiln lumber and quality hardwoods... More Info

Vacuum Kiln Conversion Kit for Lumber and Wood Dry Kilns Convert your existing conventional dry kiln into a fast drying vacuum kiln. Similar to vacuum bagging in the boat building and aircraft industry, we have come up with a proprietary process which allows you to build a very simple vacuum kiln at a fraction of the price, and without the intensive conventional metal chamber structure... More Info

Vacuum Pump Cart System for Bagging Clamping Wood Drying and more Vacuum Cart with 2HP Pump and Dual Pistons with multiple multiplex vacuum ports and liquid reservoir... More Info

Vacuum Bagging Basics Vacuum bagging is a method of clamping, which has traditionally been used in the composites industry, but can also be used for vacuum drying materials, including wood products... More Info

CONTACT TEL: 608-238-6001 Email: greg@globalmicroturbine.com | RSS | AMP