High-temperature smoke exhaust pipeline with waste heat recovery device for cold-rolling continuous annealing production line

Abstract

The invention discloses a high-temperature smoke exhaust pipeline with a waste heat recovery device for a cold-rolling continuous annealing production line. The high-temperature smoke exhaust pipeline comprises a high-temperature smoke exhaust pipeline body in which a cut-off opening is formed, wherein the cut-off opening is connected with the waste heat recovery device; the front end of the cut-off opening in the smoke flowing direction is connected with the inlet of the waste heat recovery device; and the rear end of the cut-off opening in the smoke flowing direction is connected with the outlet of the waste heat recovery device. According to the high-temperature smoke exhaust pipeline, waste heat in smoke can be recovered for generating steam or high-temperature water, so that waste of energy is reduced; after heat exchange of smoke, the temperature and the volume flow rate are reduced, meanwhile, the requirement on cold air mixing volume for protecting an induced draft fan is lowered, the output of the induced draft fan can be reduced, and the electric energy is saved; and the waste heat recovery device adopts a modular design, a quick-mounting structure and a simple process, pressure in a cold-rolling continuous annealing furnace is controllable, and the main process is not influenced.

Description

technical field [0001] The invention belongs to the technical field of cold-rolling continuous annealing production line equipment, and in particular relates to a high-temperature smoke exhaust pipe of a cold-rolling continuous annealing production line equipped with a waste heat recovery device. Background technique [0002] The existing high-temperature smoke exhaust of cold rolling and continuous annealing production lines in iron and steel enterprises generally uses air preheaters to preheat the fresh air entering the continuous annealing furnace. Although the fresh air used for combustion in the continuous annealing furnace is heated to achieve the purpose of energy saving, but After heat exchange by the air preheater, the exhaust temperature of the flue gas released through the chimney is still as high as 350°C, resulting in a great waste of energy. At the same time, the flue gas exhaust temperature is high, and the cold air valve is generally set to mix cold air to pr...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-temperature smoke exhaust pipe of a cold rolling continuous annealing production line equipped with a waste heat recovery device, so as to solve the problems of high exhaust temperature of the continuous annealing production line in the prior art, resulting in energy waste and large induced draft fan output

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