What is the basic principle of waste heat power generation?

Low-temperature waste heat power generation: Pure low-temperature waste heat recovery power generation technology is different from large and medium-sized thermal power generation. Low-temperature waste heat power generation technology is to generate electricity by recovering low-grade heat contained in low-temperature waste steam and flue gas that are continuously discharged into the atmosphere by steel, cement, petrochemical and other enterprises almost every day. It converts the low-grade or waste heat energy generated by enterprises in the production process into high-grade energy-electric energy, so it is a kind of turning waste into treasure. The core of this technology is a major breakthrough and progress in high-efficiency heat exchanger and low-temperature non-standard steam turbine. These patented technologies (7 patents) can successfully convert low-grade waste heat directly into electric energy, which not only has low investment cost, but also has remarkable economic benefits, and has found an effective way and method for large enterprises to recover waste heat and save energy. This energy-saving technology can make full use of a large number of low-value or waste heat energy generated in the production links of iron and steel enterprises (such as ironmaking, steelmaking, sintering, steel rolling and slag washing) to generate electricity, which will bring huge economic and social benefits to each iron and steel enterprise. It is roughly estimated that an enterprise with an annual output of 5 million tons of steel can make full use of the waste heat of power generation, generating about 200 million kWh of electricity throughout the year, which can increase the income of enterprises by 80 million yuan. Pure low-temperature waste heat power generation technology is an energy-saving technology actively encouraged and popularized by the state. The waste heat boiler of power plant mainly uses the waste heat of gas turbine flue gas to heat water, and the water becomes high-pressure and high-temperature steam and enters the turbine to do work. This is a combined generator set. There are many other industries, and the principle is the same. In a word, waste heat is used to improve energy efficiency.