Flues for industrial chimneys

Inactive Publication Date: 2005-07-14
TITANIUM METALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0019] As part of the workshop manufacture, low density insulation is installed onto the outside of the master cylinders to minimize heat loss of the flue gas during operation and facilitate inspection of the chimney. All metallic parts retaining insulation are to be made of titanium to eliminate galvanic (metal-to-metal)
[0021] Other design variations are possible to increase the load bearing capacity of the flue such as using corrugated titanium sheets or titanium bars or rods as stiffeners in either the axial or circumferential directions. By these methods it should be possible for the flue to withstand sub-atmospheric pressure within the flue.
[0024] Various titanium alloys could be utilized in different locations in the flue to minimize the cost and maximize the durability. For example, higher strength alloys would be used near the top of the flue where the load is greatest and Pd or Ru bearing grades would be used where the corrosion conditions are predicted to be most severe.

Problems solved by technology

This is considered to be a disadvantage with respect to this practice of the method, since the extensive on-site requires specialist trained personnel, and slows down the installation.
This method requires that the pre-existing brick lining to the flue to be in good condition, and is comparatively slow and laborious.

Method used

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  • Flues for industrial chimneys
  • Flues for industrial chimneys
  • Flues for industrial chimneys

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Embodiment Construction

[0001] 1. Field of the Invention

[0002] The subject invention is directed to a novel design and implementation of chimney flue sections comprised of titanium and its alloys to provide a combination of lower weight, corrosion resistance and flexibility in varied operating environments.

[0003] 2. Background of the Invention

[0004] Power station and other industrial boiler chimneys typically consist of an approximately cylindrical concrete windshield 15 to 20 m diameter and 50-300 m tall, within which are one or more approximately cylindrical flues. When the gas is fed directly from the boiler to the flue it is warm (100° C. to 200° C.) and dry, and a conventional mild steel flue shows insignificant corrosion during operation under these conditions.

[0005] If the boiler is burning medium to high (1% or more) sulfur coal, or high sulfur oil, flue gas desulfurization (FGD) is required. This is to minimize the release of sulfur-containing and nitrogen-containing oxides into the environmen...

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PUM

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Abstract

A novel flue design using titanium sections, affording rapid construction, corrosion resistance for low maintenance and inertness over a wide range of operating conditions. The lower density of titanium versus steel or nickel alloys makes this flue design structurally possible and results in lower cost flues compared to flues of other alloys.

Description

DESCRIPTION OF THE INVENTION [0001] 1. Field of the Invention [0002] The subject invention is directed to a novel design and implementation of chimney flue sections comprised of titanium and its alloys to provide a combination of lower weight, corrosion resistance and flexibility in varied operating environments. [0003] 2. Background of the Invention [0004] Power station and other industrial boiler chimneys typically consist of an approximately cylindrical concrete windshield 15 to 20 m diameter and 50-300 m tall, within which are one or more approximately cylindrical flues. When the gas is fed directly from the boiler to the flue it is warm (100° C. to 200° C.) and dry, and a conventional mild steel flue shows insignificant corrosion during operation under these conditions. [0005] If the boiler is burning medium to high (1% or more) sulfur coal, or high sulfur oil, flue gas desulfurization (FGD) is required. This is to minimize the release of sulfur-containing and nitrogen-containi...

Claims

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Application Information

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IPC IPC(8): F23J13/02
CPCF23J13/02F23J2213/303F23J2213/204F23J2213/202
InventorTHOMAS, ROGER O.VEITH, CARY A.GRAUMAN, JAMES S.GLITZ, RICK W.
OwnerTITANIUM METALS CORP