Download Boiler Water Treatment - Principles and Practice, Volumes by Frayne, Colin PDF

By Frayne, Colin

This accomplished reference analyzes the basics of the mechanical operation of boilers, including the utilized chemistry required to accomplish waterside cleanliness, price effectiveness and optimum boiler operation. it's the so much sensible box consultant to be had on steam and boiler water therapy.
Content:
entrance topic
• Symbols and Abbreviations
• advent: The functionality of Boiler Water remedy and its advertising and marketing
• Preface
• desk of Contents
•Volume I: Boiler fundamentals and Steam Water Chemistry 1. Steam iteration
2. Boiler varieties and functions
three. Boiler Plant Subsystems, Appurtenances, and Auxiliaries
four. Waterside and Steamside difficulties: the fundamentals
five. Waterside and Steamside difficulties: sizzling Water Heating and Low-Pressure Steam Boiler Specifics
6. Waterside and Steamside difficulties: Pre-Boiler part Specifics
7. Waterside and Steamside difficulties: Boiler part Specifics
eight. Waterside and Steamside difficulties: Post-Boiler part Specifics
•Volume II: remedies, application layout, and administration nine. Pre-Boiler and Post-Boiler therapy procedures
10. inner remedy courses
eleven. Adjuncts and Conjuctional remedies
12. keep watch over of Boiler Water Chemistry
thirteen. Operational regulate of Waterside Surfaces
14. regulate of hearth stipulations and Surfaces
Appendix I. helpful info
Appendix II. word list
• Bibliography
Index

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Also space requirements are smaller and capital and maintenance costs often are lower. In addi­ tion, electric boilers typically do not require full-time operators. The efficiency of electric boilers is high, often 95 to 98%, with per­ haps a 5 to 10% efficiency decrease from high fire to low fire (compared with an oil-fired boiler, which may only ever reach 82% efficiency and may have a 10 to 15% spread). There are two principal types of electric boiler, the electrical resist­ ance boiler and the electrode boiler.

Further boiler design developments produced various other types of compact, self-supporting, externally fired FT boilers, with the shell mounted over a steel-encased furnace. These designs were loosely called economic boilers and were typically coal- or oil-fired, threepass boilers with an arched top (the crown sheet) and stayed side-sheets and other flat steel surfaces. NOTE: The top part of a boiler shell (or drum) is still called a crown sheet, even though there is no physical, individual steel sheet involved.

These boilers were classified as exter­ nally fired FT boilers and had an external, refractory brick furnace located under a near-horizontal shell and tube heat exchanger. The exchanger was supported on brick piers and tilted 1 to 2 inches down toward the blowdown pipe at the rear of the boiler to reduce the risk of burning the bottom shell plates because of sludge buildup. The hot combustion gases were directed through the heat exchanger tubes, and to this day FT boiler combustion gas tubes continue to be var­ iously called fire tubes, smoke tubes, flue gas tubes (or simply tubes).

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