Waste heat boiler Features: heat transfer effect. The boiler adopts full film water wall structure, which has high heat transfer efficiency and good sealing performance. It solves the problems of large air leakage, high heat loss and high system energy consumption of traditional boilers. The reuse of waste heat is an effective way to save energy, reduce consumption and realize the comprehensive utilization of resources. It can not only reduce the production cost of industrial enterprises, increase the economic benefits of enterprises, but also reduce the exhaust gas temperature and dust concentration, reduce air pollution and greenhouse effect, so that enterprises can achieve resource recycling and achieve cleaner production; High safety. The rigid beam fixed structure is adopted around the membrane water wall of the boiler, which makes the boiler furnace anti deflagration and high safety. The cost is low. The overall structure of the boiler adopts the vertical layout form. The components are compact in structure, flexible in layout, small in floor area, less in infrastructure investment, and small in air leakage.

The corrosion of the tail heating surface of the boiler air preheater due to condensation often occurs, so that at present, in the design of the boiler, it is necessary to increase the exhaust gas temperature to alleviate the generation of condensation and corrosion. Even in small industrial boilers, there is no air preheater, only cast iron economizer is set, because the cast iron economizer tube wall is thick, It can withstand corrosion for a long time. Therefore, the exhaust gas temperature of the boiler is too high, and a large amount of low temperature waste heat is wasted.

Flue gas waste heat boiler Recycling of waste energy has the characteristics of full combustion, high safety, novel structure, high energy utilization rate, which can effectively reduce energy consumption, promote resource conservation, and have a good economic performance.

There is no combustion process in the waste heat boiler, which is essentially just a heat exchanger of flue gas water or flue gas steam. In practical application, most waste heat boilers use 350~800 ℃ high-temperature flue gas, which is a low-temperature boiler compared with the operating temperature of coal-fired boilers. Nearly 80% of flue gas waste heat in metallurgical industry is recovered by waste heat boiler.

Development conditions of flue gas waste heat recovery project: the exhaust gas temperature of the boiler shall be higher than the design temperature and above 140 ℃. The dew point temperature of acid shall be calculated according to the coal burning parameters of the boiler, and it shall be different from the actual flue gas temperature of the boiler. The rear flue of the boiler shall have enough space to allow the installation of flue gas waste heat recovery device.