Smoke and gas flow mixing device for combustion chamber of oil and gas fired hot blast heater

Abstract

The invention discloses a smoke and gas flow mixing device for a combustion chamber of an oil and gas fired hot blast heater provided with air distribution devices. The smoke and gas flow mixing device for the combustion chamber of the oil and gas fired hot blast heater provided with the air distribution devices comprises flanges, an outer shell, middle ring flow guiding channels, inner ring flow guiding channels, connection steel plates, outer ring flow guiding channels and a fixed shell. The outer portion is the outer shell made of steel plates. The inner wall of the outer shell is provided with refractory fibers. The fixed shell is arranged between the inner side of the refractory fibers and a heavy refractory material. The inner ring flow guide channels, the middle ring flow guide channels and the outer ring flow guide channels are arranged in the heavy refractory material. The flanges are arranged on the two sides of the outer shell. The outer shell is connected with the combustion channel and a smoke reversing chamber through the flanges. High-temperature smoke generated by combustion of a burner and cold air fed by the air distribution devices pass through a combustion channel and are guided by the inner ring flow guide channels, the middle ring flow guide channels and the outer ring flow guide channels in the flow mixing device, so that the mixed-flow gases mutually intersect and meet at a certain angle, and the smoke and the cold air are fully mixed and then enter a heat exchange body through the smoke reversing chamber.

Description

Technical field [0001] The present invention relates to the technical field of thermal energy engineering, in particular to the flue gas mixing device of the combustion chamber of the fuel gas hot blast stove with the air distribution device. Background technique [0002] The high-temperature flue gas produced by the combustion of oil or gas in the combustion chamber of the hot blast stove is mixed with the cold gas sent by the air distribution device, and then enters the flue gas chamber. Due to the short process, the high-temperature flue gas and the cold gas are not sufficiently mixed, resulting in the exchange The mixed flue gas temperature of the heating body is uneven, which causes uneven heating of the heat exchange body and large thermal stress, which makes the heat exchange body extremely easy to crack, which affects the normal operation and service life of the hot blast stove. [0003] Therefore, it is necessary to design a flue gas mixing device to solve the above proble...

AI Technical Summary

Problems solved by technology

[0002] The high-temperature flue gas generated by the combustion of fuel or gas in the combustion chamber of the hot blast stove is mixed with the cold gas sent by the air distribution device, and then enters the smoke transfer chamber. The temperature of the mixed flue gas in the heating body is uneven, resulting in uneven heating of the heat exchange body, large thermal stress, and easy cracking of the heat exchange body, which affects the normal operation and service life of the hot blast stove

Images