Multiple rake sootblower with internal valving manifold

Details Multiple rake sootblower with internal valving manifold Multiple rake sootblower with internal valving manifold

1999-11-15

2001-01-09

Moore, Chris K. (Department: 1744)

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

C122S392000

Reexamination Certificate

active

06170117

ABSTRACT:

BACKGROUND OF THE INVENTION
The invention relates generally to sootblowers used for cleaning surfaces that are subject to ash fouling. Specifically, the invention involves multiple rake sootblowers with internal valving manifolds.
In the design of sootblowers for any particular application, there are three basic goals. The first goal is to provide complete coverage of the entire area that is subject to ash fouling. Second, sufficient sootblowing media pressure should be available at each nozzle. The third goal is to minimize the space requirements for the stroke of the sootblowers to provide the complete coverage.
In the case of a long but narrow area such as heat exchanger plates, there are two common rake-type sootblower designs which are often used. One involves the use of a plurality of single rake sootblowers, usually side by side, to cover a long, narrow area. Each one of the rakes only needs a short stroke to cover its assigned area. This requires an actuator for each rake and the rakes are operated one at a time so that each rake has sufficient sootblowing pressure. The other design is the half-track design. This usually uses two rakes extending into a long area from opposite ends with each rake covering one half of the long, narrow area although there are other variations. This design requires one actuator for each of the two rakes. There are usually more nozzles in each of the two rakes than with the single rake design which results in reduced sootblowing pressure at each nozzle. Therefore, it can be seen that each of these designs has its limitations and disadvantages.
SUMMARY OF THE INVENTION
An object of the invention is to provide a sootblower with a minimum of space required for the sootblower stroke, with complete coverage, with sufficient sootblowing media pressure at each nozzle and with simple controls. The invention involves a multiple rake sootblower with an internal valving manifold to isolate each of the multiple rakes and select which of the multiple rakes is actuated. As many rakes are provided on a single sootblower as are needed to cover the area and minimize the stroke. The valving maintains the media pressure at each one of the many nozzles.


REFERENCES:
patent: 1750548 (1930-03-01), Thomas
patent: 1785821 (1930-12-01), Snow
patent: 2659630 (1953-11-01), Angstaft
patent: 4173808 (1979-11-01), Blaskowski
patent: 4209028 (1980-06-01), Shenker
patent: 5293663 (1994-03-01), McCullough

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