Boiler Economiser | Industrial Boiler Products | Cochran Boilers
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Newbie Works, Annan, Dumfries & Galloway DG12 5QU Scotland

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Cochran Economisers


The use of an Economiser can greatly reduce fuel consumption by utilising boiler flue gases to heat water for process services or to preheat boiler feed water. Cochran design and manufacture Economiser systems complete with all associated equipment to raise feed or returns water from a heating system. Install a Cochran Economiser... Achieve up to 96% efficiency* and fuel savings in excess of 6%. With payback in under a year.


For both new and existing installations.

Cochran’s Economiser units can be supplied to fit every make and model of boiler, new or old. Each unit is supplied complete with all necessary valves and gauges.

The Economiser’s controls are interlinked with boiler feed water regulating valve to ensure a flow of water through the economiser at all times.

Whether boiler-mounted or installed in a standalone format, every Cochran economiser is lagged and clad to maximise efficiency. Ideally, economiser units should use a vertical gas flow. If site conditions require a horizontal gas flow, then additional vent and drain connections are fitted.


Benefits of Cochran Economisers:

Environmental: An economiser substantially reduces overall emissions and consumption of global resources.

Cost Savings: Our Economiser will reduce a boiler’s overall fuel consumption by more than 6%.

Flexibility: Units can be constructed to suit the geometry of the site and can be fitted to suitable heat sources.

Retrofit: Whilst today almost every Cochran boiler is supplied with an Economiser already in place, we design, build and retrofit units to fit every make of boiler, no matter how old it is.

Maintenance: Our Economisers have ease of maintenance and reliability designed-in.

Efficiency: Every Cochran economiser delivers an increase of 5% in efficiency, increasing to 6% at turndown.

 

Cut fuel consumption, reduce emissions, save money...

Cochran’s compact Economiser units transfer the heat held in the boiler’s exhaust gases into the feed water BEFORE it enters the boiler, increasing the boiler’s overall thermal efficiency. Improving thermal efficiency cuts fuel use, resulting in significant cost savings and reduced emissions.

In fact, the capital cost of fitting a Cochran Economiser is usually recovered within 12 months.

Whilst they are normally fitted to natural gas-fired boilers, specially designed units may also be fitted to Liquid Fuelled Boilers. Each unit is supplied complete with all the associated equipment required.


6%+ Fuel Savings with Cochran Economisers

Complete our Heat Recovery & Economiser survey so that we can determine the level of waste heat recovery for your plant.

The Cochran range of Economisers is designed to recover heat from Boiler exhaust gases, and transfer this to the incoming Boiler feed water, thus increasing the overall Boiler Thermal Efficiency.

Economisers are normally fitted to Boilers fired with natural gas, although units of special design may be fitted to Boilers fired with liquid fuels. However, the degree of heat recovery may be limited as a result of possible “dewpoint” corrosion.


Design Features

Two standard ranges of Economisers are available, increasing the Boiler Thermal Efficiency by a nominal 3.5, and 5.0%. The resultant fuel saving will be in the order of 4.25, and 6.0% respectively.

For the 3.5% gain units, the Boiler Exhaust gases are cooled by a nominal 80 °C, with an associated feed water temperature rise of around 24 °C. For the 5% gain units, the values are 115 °C, and 34 °C respectively.

Both ranges are designed to limit the gas side pressure drop to less than 0.5 " WG, and 0.5 bar on the waterside.

The Economisers are manufactured from extended surface tubing,
within a carbon steel casing. Removable covers give access to the tubes, which can easily be removed if necessary.

They have a design pressure of 24 barg, and design temperature of 300 °C. They are UKCA, UKNI+CE or CE marked in accordance with the Pressure Equipment Directive (97/23/EC).

For dual fuel firing, when prolonged firing on oil is likely, the Units may be supplied with an integral gas bypass. The alternative to this is to incorporate a water bypass in the feed pipe work, thus allowing the units to “run dry”.

The Economiser Units are ideally arranged for a vertical gas flow, but if used with a horizontal gas flow, then additional vent and drain connections are fitted.


Enquire About Cochran Economisers

If you would like to find out more about this product, click on the link to email us and one of our staff will be in touch to discuss your enquiry.

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