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Price: $75,000 Cdn$
The ESG1 is an easy choice when compared to the “old technology” of a conventional firetube boiler.
• Completely self-contained package design reduces engineering, installation and maintenance costs
• Size requires only 1/2 the floor space and 1/2 the weight of conventional boilers, which reduces building size, structural support costs and shipping costs
• Ease of tube replacement requires no overhead cranes, special rigging, special crews, or extra roof height above the unit, while reducing down time.
• Produces greater than 99% dry steam.
• Provides 100% turndown capability.
• 5 – 10 minutes from startup to full output
• Integrated exhaust modulating bypass for safe automatic steam control.
• Explosion-proof heat transfer exchanger.
• Low friction loss for minimum static exhaust back pressure.
• High circulating flow to minimize scale buildup.
• No thermal expansion concerns with cold boiler feedwater.
• Performance aimed at the lowest pinch point in the industry (final leaving exhaust temperature minus operating steam temperature) for maximum thermal efficiency.
The ESG1 requires only the following connections for a cost effective installation:
• Steam outlet
• Exhaust flange inlet and outlet
• Single main power
• Single main blowdown
• Feedwater inlet
• Pneumatic control air
• Cooling water inlet and outlet
EXHAUST STEAM GENERATOR
The fully packaged ESG1 is selected from 124 pre-engineered standard models with output capabilities of 20 to 300 boiler hp and operating steam pressures from 3 to 450 psig. The ESG1 is shipped complete, ready for operating as either a primary or supplementary steam source.
The ESG1 package is made up of three basic sections:
• finned tube heat transfer section
• steam flash circulating drum assembly
• modulating full port exhaust bypass system
OPERATION & CONTROL
The integral forced circulating water pump continually circulates high temperature water from the steam flash drum assembly to the heat transfer core assembly. Btu is transferred from the exhaust to a high flow
superheated water/steam mixture. The superheated water is returned to the steam drum which contains dry pipe, baffles, and lance assemblies, where it flashes into 99% dry stream as its exits out to the system. As the water is generated into steam and exits the boiler, the modulating boiler feedwater system controls continuous feedwater flow for constant drum water level control. Fail safe controls are built in for full exhaust
bypass in the event of electrical or pneumatic loss. The steam pressure controller maintains the operating steam pressure as it controls the modulating exhaust bypass assembly. This provides solid operating steam pressure under various operating steam load demands.
The ESG1 is manufactured, tested, and stamped in accordance with the requirements of Section I of the ASME Boiler and Pressure Vessel Code, and National Board. Boiler trim includes all safety controls and alarms
to meet state and federal codes. Final assembly, electrical wiring, and factory adjustments are completed under a strict set of guidelines.
ENGINE EXHAUST APPLICATION
• Capacity: 400kW – 7MW
• Entering gas temps: 500 – 1,250°F
• Heat sink types: Supplemental steam demand and/or primary steam source for steam heating or process steam
• Tremendous fuel savings typically pay for equipment and installation within 1 to 3 years of average use.
• Pollution reduction due to lowered annual fuel usage.
• Lower exhaust temperatures and significantly reduced sound output levels (final sound attenuation is typically 15—25 dBA).
Cost Savings Analysis
Exhaust Steam Generator (ESG1)
Cain Industries Web Site for Videos and Information: http://www.cainind.com/cain_cat_cogeneration.php
Cain Heat Recovery Units
• New still in the box
• 8 Units available
Data without a Cain System
Combustion source: Engine generator
Heat Sink:Steam Demand
Waste Exhaust Temp: 1,150 °F
Water Temp Inlet:N/A
Fuel Type: Natural Gas
O2 Content: N/A
Excess Air: N/A
Fuel Cost Per Therm: $0.60
Annual Operating Hours: 8,700
Performance with a Cain System
Operating Steam Pressure: 10psi
Final Exhaust Temp: 301 °F
Boiler Horsepower: 51 BHP
Equivalent Evaporation: 1,743 lb/hr
Exhaust Pressure Drop: 1.44WC”
Btu/hr Recovered: 1,691,000
Total Cost: $70,674
Payback: 9.6 months
Annual Return On Investment: 125%
Annual Savings: $88,277