Waste heat power generation is a technology that uses the surplus heat energy in the production process to convert into electric energy. Waste heat power generation can save energy and is also conducive to environmental protection. Generator set waste heat boiler The important equipment of is waste heat boiler. It uses heat or combustible matter in waste gas, waste liquid and other working medium as heat source to produce steam for power generation. Because the working medium temperature is not high, the boiler is large and consumes more metal. Waste heat used for power generation mainly includes: high temperature flue gas waste heat, chemical reaction waste heat, waste gas, waste liquid waste heat, low temperature waste heat (below 200 ℃), etc. In addition, there are power generation with excess pressure difference; For example, if the pressure of the blast furnace gas at the top of the furnace is high, it can be sent to the gas users after being generated by the expansion turbine generator.

In industry, the waste heat is generally First, it is used for production. When there is surplus, although direct use (such as heating, ventilation and air conditioning or power use) has a higher utilization rate of energy, it is limited to the characteristics of small consumption of heating, ventilation and air conditioning and large seasonal changes, as well as the relatively stable load required for power use, Generator set waste heat boiler This utilization mode has limitations. More importantly, waste heat power generation technology is used to recycle energy.

Waste heat is the energy that has not been used in the energy utilization equipment under the economic and technical conditions, that is, redundant and waste energy. It includes seven kinds of waste heat of high-temperature waste gas, waste heat of cooling medium, waste heat of waste steam and waste water, waste heat of high-temperature products and slag, waste heat of chemical reaction, waste heat of combustible waste gas and waste, and residual pressure of high-pressure fluid. According to the survey, the total waste heat resources of various industries account for 17%~67% of the total fuel consumption, and the recyclable waste heat resources account for about 60% of the total waste heat resources.