Boiler economizer principle: flue boiler economizer device is connected to the boiler flue. One end of a high effective thermal welding unit within the flue means, the thermally conductive material is thermally media sealed in a vacuum state within the tubular container, heat media material is a solid state at low temperature, when the temperature was raised to 60 degrees to become gaseous fission , and make high-speed movement in the vacuum tube, the heat from the heat receiving end to pass out, the other end of the role of water, the water heated heating. Because the flue heat greater than 200 degrees, the boiler economizer system ensures that the water temperature is higher than 90 degrees, then add water preheated boiler economizer in order to achieve the purpose. Boiler economizer Energy Saving Performance: 1, to meet the boiler water. Heat-transfer area is determined based on a sudden water capacity and the flue waste heat boiler evaporation temperature, they are able to meet the boiler water; 2, high thermally conductive medium thermal efficiency, thermal efficiency of 98%, 4T boiler flue temperature is greater than 200 degrees, so the economiser the water temperature is above 90 degrees; 3, boiler water above 90 degrees, the economizer effect is obvious; 4, boiler economizer system is running in the non-pressure condition, safe and reliable. Boiler economizer Application: efficient boiler economizer device is the use of waste heat boiler flue preheating boiler heat, so all industrial and mining legislation, horizontal steam boiler for energy can be applied to the product.