What is an Economizer?

     Economizer is an important accessory for industrial boilers. It consists of fins bent in a U-shape arranged alternately, acting as a heat exchanger between gas and liquid. It helps improve the efficiency of industrial boilers in steam production systems by recovering heat from heat sources such as exhaust gas from industrial boiler processes and transferring it to water used in various production processes. Additionally, the economizer is designed to help save energy and reduce electricity consumption.

There are 2 types of economizers as follows:

     1.  Type used with round chimneys
     2.  Type used with rectangular ducts

     Using an economizer to reduce boiler energy consumption is a highly efficient energy-saving method but requires caution. The economizer will not function properly if the exhaust gas temperature after passing through the economizer is too low, which affects airflow and can cause condensation of sulfuric acid, leading to corrosion of metal equipment.

Benefits of the Economizer System

     It helps reduce the temperature difference between the water in the industrial boiler and the feedwater by recovering heat. Installing an economizer can lower the exhaust temperature by about 20 degrees Celsius, which increases boiler efficiency. Safety valves and separate temperature gauges should be installed to immediately drain the economizer and close its inlet and outlet in case of water shortage in the industrial boiler to prevent accidents.

How to Maintain the Economizer

     The economizer requires regular cleaning of the heat exchange surfaces because over time, dirt and deposits reduce heat exchange efficiency. Cleaning can be easily done by spraying water and scrubbing with a brush to remove dirt, which helps maintain the economizer’s performance.

     Therefore, if you are looking for a device to save electricity for industrial boilers, the Economizer is an essential piece of equipment widely used in industrial plants. It enhances the boiler’s performance and helps save electricity effectively. Thai Hirakawa Co., Ltd. is a distributor of high-efficiency boilers from Japan and provides installation services for steam generators for all industrial applications. Our products are internationally recognized for quality and standards under the "MP Boiler" brand. We are happy to provide consultation and services to meet your budget and needs for maximum customer benefit. For more products or services, please click here.
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