Operating Experience of Two-Stage Oxygen Delignification (DUALOX) System.

An internal inspection of the expander after 16,000 hours of operation confirmed the successful operation of Ingersoll-Rand’s first two stage, high temperature, FCC expander. This paper discusses the construction and operation of the unit, designed for 1300°F (704°C) dirty gas environment and presents the inspection results of critical components.

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Operating Experience With a Two-Stage H2S Scrubber Using Caustic Soda

10.2118/13640-ms ◽

1985 ◽

Cited By ~ 1

Author(s):

J.B. Siemak ◽

M. Gelbs

Keyword(s):

Caustic Soda ◽

Operating Experience ◽

Two Stage

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B&W IR-CFB: Operating Experience and New Development

18th International Conference on Fluidized Bed Combustion ◽

10.1115/fbc2005-78004 ◽

2005 ◽

Cited By ~ 1

Author(s):

M. Maryamchik ◽

D. L. Wietzke

Keyword(s):

Operating Experience ◽

Collection System ◽

Two Stage ◽

New Development ◽

Boiler Design ◽

Erosion Protection

The paper provides an update on B&W Internal Recirculation (IR) CFB boilers featuring a two-stage solids collection system. The paper describes the latest commercial projects, operating experience and developments in boiler design and process. Those concern solids collection system, erosion protection, etc.

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The PGT2, a New 2-MW Class Efficient Gas Turbine: Applications and Operating Experience in Cogeneration

ASME 1996 Turbo Asia Conference ◽

10.1115/96-ta-028 ◽

1996 ◽

Author(s):

Erio Benvenuti ◽

Marco Sargenti

Keyword(s):

Gas Turbine ◽

Pressure Ratio ◽

Operating Experience ◽

Paper Mill ◽

Medium Size ◽

Economic Evaluations ◽

Cogeneration Plant ◽

Two Stage ◽

Paper Mills ◽

Operational Data

The PGT2 is a single-shaft gas turbine with a 2 MW ISO electric output that, after an extensive factory development program has been launched into industrial service with a number of cogeneration applications in small-medium size industries. The two-stage high pressure ratio compressor combined with the single-can combustor and the two-stage air-cooled transonic turbine provides a compact and rugged architecture. The turbine inlet temperature in the 1050–1100 °C class and the 12.5:1 pressure ratio provide a 25% electrical efficiency and a high exhaust temperature that make this machine attractive for a variety of both civil and industrial applications like hospitals and pulp and paper mills, textile, tiles, cement, glass and food production. The exhaust heat recovery boiler can be either a commercial unit or compact once-through type of proprietary design that is housed in a vertical exhaust duct to substantially reduce powerplant footprint area when space is limited. The first application that has provided the most extensive operating experience so far is cogeneration in a paper mill in central Italy. Detailed studies on the potential energy saving and on the return of investment cycle were made in collaboration with the client, and provided a valuable basis for further studies that led to additional orders for paper mills, textile and tile industries. The first installed unit is a package comprising a once-through-flow boiler that was full-load tested at the factory before shipping. Commissioning of the cogeneration plant was started in 30 days after shipment and the plant was taken over by the client in less than three months. A dedicated telephone line allows the power plant to be monitored directly from Florence, thus making it possible to gather operational data in real time and to provide this first customer with prompt assistance during the 4-year service and maintenance contract period. This paper describes the PGT2 design and performance features, the technical and economic evaluations made for the first application, the cogeneration plant layout and a summary of the most significant operational data collected in the initial months or regular service in the paper mill.

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Operating Experience of the two stage (medium-High-Consistency) Peroxide Bleaching of Mechanical Pulp.

JAPAN TAPPI JOURNAL ◽

10.2524/jtappij.49.135 ◽

1995 ◽

Vol 49 (1) ◽

pp. 135-139

Author(s):

Kazuhiro Kubo

Keyword(s):

Operating Experience ◽

Two Stage ◽

Mechanical Pulp ◽

Peroxide Bleaching ◽

High Consistency

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Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100153816 ◽

1989 ◽

Vol 47 ◽

pp. 368-369

Author(s):

Sengshiu Chung ◽

Peggy Cebe

Keyword(s):

Single Crystals ◽

High Performance ◽

Dilute Solution ◽

Two Stage ◽

Annealing Behavior ◽

High Performance Polymers ◽

Seeding Method ◽

Phenylene Sulfide

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

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