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Title: A corrosive resistant heat exchanger

Abstract

A corrosive and erosive resistant heat exchanger which recovers heat from a contaminated heat stream. The heat exchanger utilizes a boundary layer of innocuous gas, which is continuously replenished, to protect the heat exchanger surface from the hot contaminated gas. The innocuous gas is pumped through ducts or perforations in the heat exchanger wall. Heat from the heat stream is transferred by radiation to the heat exchanger wall. Heat is removed from the outer heat exchanger wall by a heat recovery medium. 3 figs., 3 tabs.

Inventors:
Publication Date:
Research Org.:
EG and G Idaho, Inc., Idaho Falls (USA)
OSTI Identifier:
6562578
Patent Number(s):
PATENTS-US-A6083340
Application Number:
ON: DE89000161
Assignee:
INEL; ERA-14-011557; EDB-89-021525
DOE Contract Number:
AC07-76ID01570
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; HEAT EXCHANGERS; DESIGN; CORROSION RESISTANCE; EROSION; INVENTIONS; 420200* - Engineering- Facilities, Equipment, & Techniques

Citation Formats

Richlen, S.L. A corrosive resistant heat exchanger. United States: N. p., 1987. Web.
Richlen, S.L. A corrosive resistant heat exchanger. United States.
Richlen, S.L. 1987. "A corrosive resistant heat exchanger". United States. doi:.
@article{osti_6562578,
title = {A corrosive resistant heat exchanger},
author = {Richlen, S.L.},
abstractNote = {A corrosive and erosive resistant heat exchanger which recovers heat from a contaminated heat stream. The heat exchanger utilizes a boundary layer of innocuous gas, which is continuously replenished, to protect the heat exchanger surface from the hot contaminated gas. The innocuous gas is pumped through ducts or perforations in the heat exchanger wall. Heat from the heat stream is transferred by radiation to the heat exchanger wall. Heat is removed from the outer heat exchanger wall by a heat recovery medium. 3 figs., 3 tabs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1987,
month = 8
}
  • A corrosive and errosive resistant heat exchanger which recovers heat from a contaminated heat stream. The heat exchanger utilizes a boundary layer of innocuous gas, which is continuously replenished, to protect the heat exchanger surface from the hot contaminated gas. The innocuous gas is conveyed through ducts or perforations in the heat exchanger wall. Heat from the heat stream is transferred by radiation to the heat exchanger wall. Heat is removed from the outer heat exchanger wall by a heat recovery medium.
  • A corrosive and errosive resistant heat exchange is described which recovers heat from a contaminated heat stream. The heat exchanger utilizes a boundary layer of innocuous gas, which is continuously replenished, to protect the heat exchanger surface from the hot contaminated gas. The innocuous gas is conveyed through ducts or perforations in the heat exchanger wall. Heat from the heat stream is transferred by radiation to the heat exchanger wall. Heat is removed from the outer heat exchanger wall by a heat recovery medium.
  • Ten ceramic oxide coating systems, including single-layered mullite and multilayered coatings of mullite, zircon, alumina, yttria, and yttria-stabilized zirconia, were exposed to a simulated aluminum reclamation environment at temperatures ranging from 760-1204 C (1400-2200 F) for 2000 hours plus 10 thermal cycles. Corrosion of the silicon carbide tubes increased with decreasing temperature from 1204 C (2200 F) to 760 C (1400 F). Single layer mullite coatings showed superior corrosion resistance, particularly mullite coatings containing a vitreous phase ceramic seal coating on the outer surface. Measurement of silicon carbide tube wall recessions indicated that the coatings which withstood the 2000 hoursmore » exposure test without spalling from the substrate were protective, as compared to uncoated silicon carbide tube sections.« less
  • An essentially Fe- and Co-free alloy is composed essentially of, in terms of weight percent: 6.0 to 7.5 Cr, 0 to 0.15 Al, 0.5 to 0.85 Mn, 11 to 19.5 Mo, 0.03 to 4.5 Ta, 0.01 to 9 W, 0.03 to 0.08 C, 0 to 1 Re, 0 to 1 Ru, 0 to 0.001 B, 0.0005 to 0.005 N, balance Ni, the alloy being characterized by, at 850.degree. C., a yield strength of at least 25 Ksi, a tensile strength of at least 38 Ksi, a creep rupture life at 12 Ksi of at least 25 hours, and a corrosionmore » rate, expressed in weight loss [g/(cm.sup.2 sec)]10.sup.-11 during a 1000 hour immersion in liquid FLiNaK at 850.degree. C., in the range of 3 to 10.« less
  • An improved high energy laser (HEL) mirror is provided wherein the internal surfaces of the molybdenum structure of the mirror defining passageways for water coolant flow are plated with deposition (CVD) techniques described by the invention herein. The mirror is thereby made resistant to the corrosive action of the circulating coolant water on the molybdenum structure comprising the laser mirror.