Method and apparatus for repairing glass-lined equipment by sol-

Details Method and apparatus for repairing glass-lined equipment by sol- Method and apparatus for repairing glass-lined equipment by sol-

1991-05-30

1992-12-29

Yuen, Henry C.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219535, 432 5, 432225, H05B 102, F24J 300

Patent

active

051754142

ABSTRACT:
A method of repairing a damaged portion of a glass layer of glass-lined steel equipment by repeated steps of applying a repair agent to a damaged area of the glass layer and then heating the repair agent for solidification and adherence to the glass by the use of a sol-gel process, until a thickness of a repair glass layer becomes almost equal to the existing glass layer adjacent thereto without generating cracks or exfoliations in the glass. Also, an apparatus for heating the repair area of a layer of glass-lined steel equipment includes a flexible thermal insulation sheet body having a recess on a single side thereof; electric heater units provided in the recess for emitting far infrared rays; magnets provided adjacent to the recess for securing the sheet body on a wall of glass-lined equipment covering the damaged portion to be repaired; a silica glass cloth enclosing the body for maintaining configuration; a thermal sensor placed in the recess for locating adjacent to the damaged area; and a thermal controller coupled to the sensor and the heater units for automatically controlling the temperature of the heater units.

REFERENCES:
patent: 4149066 (1979-04-01), Niibe
patent: 4212629 (1980-07-01), Nagasaka et al.
patent: 4281238 (1981-07-01), Noma et al.
patent: 4486649 (1984-12-01), Lane, Jr.
patent: 4506138 (1985-03-01), Bennett et al.
patent: 4586896 (1986-05-01), Smith
patent: 4827103 (1989-05-01), Asp
patent: 4918292 (1990-04-01), Nussbaum et al.
patent: 4937435 (1990-06-01), Goss et al.

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