Liquid heaters and vaporizers – Cleaning – Blow off
Patent
1987-07-13
1989-07-18
Kyle, Deborah L.
Liquid heaters and vaporizers
Cleaning
Blow off
122392, F22B 3748
Patent
active
048482781
ABSTRACT:
Sludge-removing fluid lances are moved simultaneously toward the center of a tube bundle in a steam generator through diametrically opposite lance ports. Fluid-blocking suction dams are placed in the peripheral lane of the steam generator at diametrically opposite inspection ports from which fluid-entrained sludge is removed. All four of the ports are spaced apart by 90.degree.. Fluid-entrained sludge is blocked on the opposite sides of both suction dams, thereby preventing redeposition of sludge in previously cleaned areas of the tube sheet of the generator. The fluid flow rates of the lances are controlled to be equal to each other, and the rate of removal of the fluid-entrained sludge through each suction dam is controlled to be the same as the fluid flow rate of each lance. A separate flushing stream in the peripheral lane is not required.
REFERENCES:
patent: 4037569 (1977-07-01), Bennett et al.
patent: 4079701 (1978-03-01), Hickman et al.
patent: 4424769 (1984-01-01), Charamathieu et al.
patent: 4452183 (1984-06-01), Yazidjian
patent: 4620881 (1986-11-01), Booij
patent: 4653435 (1987-03-01), Lebouc
patent: 4715324 (1987-12-01), Muller et al.
Apex Technologies, Inc.
Kyle Deborah L.
Meloy Sybil
Wasil Daniel
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