Preheating device of single-bar heating furnace

Abstract

The invention discloses a preheating device of a single-bar heating furnace. A bottom frame and a preheating chamber arranged on the bottom frame are included. A plurality of smoke circulation devicesare arranged in the preheating chamber. Each smoke circulation device comprises an air guiding pipeline, a backflow pipeline, a circulation wind wheel arranged in the air guiding pipeline and a firstdrive mechanism, wherein the air guiding pipeline and the backflow pipeline are mutually connected, the backflow pipeline is arranged on the lower side of the air guiding pipeline, a circulation preheating chamber is arranged below the circulation wind wheel, the bottom end of the circulation preheating chamber communicates with the backflow pipeline, an aluminum bar is arranged in the circulation preheating chamber, a backflow channel is formed by the circulation preheating chamber and the inner wall of the air guiding pipeline, the circulation wind wheel is used for extracting smoke in thecirculation preheating chamber, and smoke enters the circulation preheating chamber through the backflow channel to form smoke cycle. Compared with the prior art, under multi-time flowing cycle of high-temperature smoke, the high-temperature smoke can effectively make contact with the aluminum bars in the preheating chamber for efficient preheating, the staying time of the high-temperature smoke in the preheating chamber is prolonged, the heat transfer efficiency of the high-temperature smoke in the preheating chamber is improved, and the effects of energy saving and emission reducing are achieved.

Description

technical field [0001] The invention relates to the field of aluminum rod heating equipment, in particular to a preheating device for a single rod heating furnace. Background technique [0002] Existing single-rod heating furnaces generally adopt gas-fired straight-line heating. After the aluminum rods in the heating furnace are heated by gas, high-temperature flue gas will be generated. To ensure stable air pressure in the furnace, the high-temperature flue gas is drawn to the preheating area by a fan. In the furnace, the high-temperature flue gas will preheat the aluminum rod to be heated in the furnace body, and then it will be discharged out of the furnace through the exhaust pipe installed in the preheating area, so as to achieve the purpose of energy saving and emission reduction. [0003] However, most of the high-temperature flue gas cannot effectively contact the aluminum rods for heat transfer, so that most of the high-temperature flue gas is directly discharged ou...

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Problems solved by technology

[0003] However, most of the high-temperature flue gas cannot effectively contact the aluminum rods for heat transfer, so that most of the high-temperature flue gas is directly discharged outside the furnace without being utilized, and the preheating effect of the aluminum rods is poor, resulting in high exhaust gas temperature, high fuel consumption, and energy waste. , the production cost increases

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