Talk about waste heat utilization knowledge

Waste heat is the energy that is not used in energy use equipment under certain economic skills, that is, the remaining and abandoned energy. It includes seven kinds of high temperature waste gas waste heat, cooling medium waste heat, waste steam waste water waste heat, high temperature products and slag waste heat, chemical reaction waste heat, combustible waste gas waste liquid waste heat and waste waste and high pressure fluid residual pressure.

According to the query, the total waste heat resources of various industries account for about 17% to 67% of the total fuel consumption, and the recoverable waste heat resources are about 60% of the total waste heat resources. The steel industry heating furnace high-temperature flue gas recovery power generation skills can recover the full cost of the year, and the heat utilization rate has improved by 5-10%.

There are many ways to recycle waste heat. Generally speaking, the comprehensive use of waste heat is good; The second is direct use; The third is indirect use (producing steam to generate electricity). For example, the steel industry: coke ovens in steel plants. At present, China's large and medium-sized iron and steel enterprises have more than 50 coke ovens of different sizes.

In addition to the level of industrialization has reached the international level, the energy consumption level of other manufacturers is very high, and there is great potential to tap. The converter flue gas power generation and power generation system in the steel mill can be equipped with 80 power stations with power generation capacity of 3000Kw. There are now more than 20 electric furnaces in steel mills, among which 65 tons can generate more than 5000Kw/ seat.