REPLACING THE COMPETITION
Beyond the 5 boiler economizer product lines, including over 500 boiler exhaust economizers, the 'unique application' is no problem. Our team concept with the specifying engineer provides the solutions for the complete engineered system. These systems have ranged from modifying the RTR model to all stainless for condensing natural gas combustion below 150°F to preheating boiler feedwater from bio/landfill fired boiler exhaust.
Impossible to some, but for one of the largest hospitals in Manhattan we designed and manufactured a large customized RTR unit (lower-left photo) that could be shipped in small components and reassembled in the field. The objective was to provide a boiler economizer which would retrofit the exhaust of two of the five 125,000 pph boilers as located 3 stories below the street. All the components were shipped on two flat bed trucks. Upon jobsite arrival the components were manually carried down through a 3x3 foot square manway in the middle of the sidewalk. They were then assembled together as a single 250,000 pph boiler economizer within the two boiler's manifolded exhaust breaching. Since the boiler feedwater piping had been completed prior, the installation was finished in two weeks!.
The horizontal RTR (top photo) was custom engineered and manufactured to replace a competitor's unit that failed. One of the problems causing the failure was poor performance due to an ineffective sootblower. Cain's exclusive Timed Automatic Sootblower provides total control for blowdown intervals to accommodate the specific soot buildup of every application. This unit was also designed to exactly match the exhaust flange dimensions and overall size for easy replacement.
The vertical RTR unit (upper-right photo) replaced a failed competitor's unit and was constructed to be a replacement fit and offer greater performance. ASME designed at 750 PSIG this RTR is rated for a 150,000 lb/hr steam boiler. With an exhaust gas flow rate of more than 36,000 SCFM, it saves the end user over $450,000 each year in fuel costs.
We engineer and manufacture combustion heat recovery systems for just about every type of combustion source. This ranges from the small multi-family residential natural draft boilers to the large high pressure industrial boiler feedwater preheater systems.
Whether you need a single straight forward economizer or you are planning a complex process application, we would like to discuss the ways that Cain Industries can dove-tail our engineering skills to meet your needs.
EXCLUSIVE OPTIONAL TIMED AUTOMATIC SOOTBLOWERS
The exclusive Cain Industries Timed Automatic Sootblower design is applied where the sulfur content is high and/or combustion efficiency is poor. When a soot layer accumulates on the heating surface to a thickness of 1/8", fuel consumption is increased by 8.5%. The sootblower is also applied when it is not cost-effective to open inspection doors and clean the exchanger by other means. The sootblower system will continually keep the heating surface at a high performance level and eliminate the day-to-day operator expense and operation down time.
The blowdown sequence occurs while the boiler is in full operation and is fully adjustable. The special flood-jet type nozzles achieve maximum cleaning velocity using steam or air as discharged through an electric control valve (included).
Together they form a 'continuous knife edge concentrated spray pattern' surrounding the heating surface. This 'ring nozzle assembly' is attached to a manifolded flexible steel hose assembly and powered up and down by a pneumatic drive cylinder. Dual timing relays allow complete control for cycle duration and interval specific to each application. The final results are a controlled double cleaning action, insuring that the maximum BTU recovery and anticipated savings are achieved.
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