A sintering flue gas waste heat circulation system

Abstract

The invention relates to the technical field of sintering machines, in particular to a sintering flue gas waste heat circulation system. The sintering flue gas waste heat circulation system comprisesa sintering machine tool and a trolley. An igniter is arranged above one end of the sintering machine tool. A sintering air bellow set is arranged below the sintering machine tool and comprises ignition air bellows, low-temperature air bellows and high-temperature air bellows. An exhaust flue communicating with the low-temperature air bellows is arranged on the lower sides of the low-temperature air bellows, and a first air extractor is arranged on one side of the exhaust flue. A first gas return flue communicating with the ignition air bellows is arranged on the lower sides of the ignition air bellows, and a second gas return flue communicating with the high-temperature air bellows is arranged on the lower sides of the high-temperature air bellows. Hot air hoods are arranged at the positions, located above the low-temperature air bellows and the high-temperature air bellows, on the sintering machine tool, and the hot air hoods communicate with the first gas return flue and the secondgas return flue through a second air extractor. The sintering flue gas waste heat circulation system has the following effects that after high-temperature flue gas is input into the hot air hoods, theupper surfaces of materials in the trolley are heated, waste heat in the flue gas can be cyclically utilized, heat losses can be reduced, and the energy utilization rate can be improved.

Description

technical field [0001] The invention relates to the technical field of sintering machines, in particular to a sintering flue gas waste heat circulation system. Background technique [0002] Sintering refers to the transformation of powdery materials into dense bodies. It is a traditional process and is generally sintered by a sintering machine. The sintering machine is suitable for the sintering operation of large-scale ferrous metallurgical sintering plants, and is mainly suitable for the sintering treatment of iron ore powder in large and medium-sized sintering plants. [0003] The sintering machine includes a sintering machine tool, on which a number of trolleys loaded with materials are slidingly connected, an igniter is installed at one end of the sintering machine tool, and the igniter sinters the trolley below it, and a sintering machine is installed on the lower side of the sintering machine tool The bellows and sintering bellows exhaust the lower part of the trolle...

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Problems solved by technology

[0004] During the sintering process, the temperature of several trolleys close to the igniter is high after being heated by the igniter. The temperature of the flue gas in the sintering bellows is about 120°C. After the trolley continues to move, it will continue to burn, because there is no heating by the igniter , the surface temperature of the material drops, and the liquid inside the material vaporizes and absorbs heat, causing the flue gas temperature of the sintering bellows below it to be between 70 and 100°C, and when the inside of the material is completely dry, its temperature will rise, and the sintering bellows at the end The temperature of the flue gas is about 350°C, the heat contained in the flue gas in the sintering bellows will be discharged directly, and the heat loss will be more, resulting in energy waste

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