Method for cleaning heat exchanger tubes by creating shock wave

Details Method for cleaning heat exchanger tubes by creating shock wave Method for cleaning heat exchanger tubes by creating shock wave

1993-02-12

1995-06-13

Kastler, Scott

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

134 2211, 134 2212, 134167C, 134169C, B08B 312, B08B 902

Patent

active

054239176

ABSTRACT:
A method for cleaning tubes and heat exchangers as set forth. The method and apparatus involve an elongate lance which is mounted to move in an X and Y pattern to align with a set of tubes. Each tube is cleaned by positioning the lance at the end of each tube to be cleaned. A plug is placed in the tube to be cleaned to form a standing column for water. By means of a valve control system, the standing column of water is cycled from low to high pressure by switching the flow of water. In this switched mode, water is delivered under pressure into the column. The lance tip functions in conjunction with an orifice upstream of the lance tip to form a shock wave of energy radiating along the standing column of water from the orifice into the tube to be cleaned. The addition of water to the tube ultimately moves the plug along the length of the tube. It is one theory of operation of the present disclosure that the column of water exposed to shock waves is used in cleaning, i.e., shock waves do the cleaning while the addition of water merely provides sufficient water to form the standing column of water in the tube.

REFERENCES:
patent: 3565689 (1971-02-01), Lowe et al.
patent: 4655846 (1987-04-01), Scharton et al.
patent: 4716611 (1988-01-01), Barry
patent: 4724007 (1988-02-01), Barry et al.
patent: 4756770 (1988-07-01), Weems et al.
patent: 4878517 (1989-11-01), Prange
patent: 5183513 (1993-02-01), Sajewski

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