The burner structure of the rear-mounted steam heating furnace

Abstract

The invention relates to a burner structure of a rear-mounted steam heating furnace. The lower end part of a vertical ascending section hearth is connected with a horizontal burning section hearth, the upper end part of the vertical ascending section hearth is connected with a horizontal mixing section hearth, a gas burner is arranged outside the other end of the horizontal burning section hearth, a fume cooler is arranged in the vertical ascending section hearth, and a temperature measurer and an overheater pipe bundle are arranged in the horizontal mixing section hearth. By adopting the distribution manner of the rear-mounted burner, high-temperature fume generated by the gas through the combustion of the burner flows forwards along the hearth, then turns to ascend and turns to flush the overheater pipe bundle, a cooling device is arranged on an ascending area, and the high-temperature fume and a cooling gas are fully mixed in a mixing area for cooling, so that all parts of the overheater pipe bundle are evenly heated, a furnace pipe is prevented from being overheated and bursted; and the hearth adopts a C-shaped distribution manner, so that the residence time of a fuel in the hearth can be prolonged, and the sufficient burning of the fuel is facilitated.

Description

technical field [0001] The invention relates to a burner structure of a steam heating furnace, in particular to a burner structure of a rear-mounted steam heating furnace. Background technique [0002] Iron and steel plants produce a large amount of low-temperature and low-pressure saturated steam in the process of steelmaking and rolling, such as converters and heating furnace vaporization cooling devices. Except for a small amount of self-use, most of the low-pressure saturated steam is often not used rationally and can only be discharged into the air. It pollutes the environment and causes a great waste of energy. [0003] The arrangement of burners in steam heating furnaces in the iron and steel industry is various. There is a straight-through type, that is, the burner is arranged in front of the heating surface of the superheater; there is also a shaft arranged in front of the heating surface, and the burner is arranged at the bottom of the shaft. Or due to the limitat...

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Problems solved by technology

Or due to the limitation of the site, it is impossible to meet the sufficient travel distance required by the gas combustion. Most of the high-temperature flue gas directly flushes the heating surface of the superheater. The flue gas temperature cannot be effectively controlled, resulting in overheating of the front row furnace tube of the superheater, and frequent tube explosion accidents

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