Method and device for generating power through low-temperature waste gas waste in industrial furnace production technology

Abstract

The invention discloses a method and a device for generating power through low-temperature waste gas waste in the industrial furnace production technology. A heat removal device of a generator set replaces a cooling device in a conventional technology, or the heat removal device is directly placed at an exhaust-gas outlet of an industrial furnace; a circulation loop consisting of an expander, a heat emission device, a high-pressure working medium pump and the heat removal device drives the expander to drive a low-temperature heat binary cycling generator to work for power generation; low-grade waste heat in evacuated waste gas of the industrial furnace is extracted; and absorbed heat is fed into the generator set to be transferred into electrical energy while the waste gas is cooled, and the waste gas which finishes power generation is returned to an original process system or discharged into the air. According to the method and the device for generating power through low-temperature waste gas waste in the industrial furnace production technology, the utilization ratio of the low-grade evacuated waste gas of the industrial furnace is effectively improved, the operation cost of an enterprise is reduced, and the thermal pollution to the environment is reduced.

Description

technical field [0001] The present invention relates to a waste gas waste heat recovery power generation method and its device, in particular to a method for cooling the waste heat gas discharged in the production process of an industrial kiln, and using the waste heat discharged in the cooling process to generate electricity to achieve waste heat recovery and utilization Methods and Apparatus. Background technique [0002] Energy is the material basis of the national economy and the driving force behind economic development, and the efficient use of energy is an important guarantee for sustainable economic development. The recovery and utilization of industrial waste heat has become an increasingly important role in energy conservation and emission reduction. At present, high-temperature and medium-temperature exhaust gas waste heat recovery and power generation technologies have been widely promoted, but for low-temperature waste heat, heat exchange is currently the main m...

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Problems solved by technology

The calorific value of the waste gas exhausted by industrial kilns accounts for more than 20% of the total energy consumption of the kiln, but the waste heat utilization rate of the waste gas is only 4-5%, and the energy saving potential is huge. Solving the energy saving problem of industrial kiln equipment is very important for the above industries and The sustainable development of my country's national economy has a major role in promoting

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