Smoke recycling auxiliary burning type aluminum melting furnace

Abstract

The invention discloses a smoke recycling auxiliary burning type aluminum melting furnace. The smoke recycling auxiliary burning type aluminum melting furnace comprises an aluminum melting furnace body, at least one main burning gun and a smoke pipe; the aluminum melting furnace body comprises a hearth arranged insides, a burning chamber located at the upper middle portion of the hearth, a molten aluminum pool located at the lower portion of the hearth and a high temperature smoke outlet formed in the lateral wall of the aluminum melting furnace body and communicated with the burning chamber; the at least one main burning gun is arranged on one end wall of the aluminum melting furnace body and used for jetting fuel to the interior of the burning chamber for burning and heat releasing so as to melt aluminum in the molten aluminum pool into molten aluminum; and the high temperature smoke outlet is connected to a chimney through the smoke pipe. The smoke recycling auxiliary burning type aluminum melting furnace further comprises an auxiliary burning gun and a smoke backflow pipe, wherein the auxiliary burning gun and the at least one main burning gun are arranged on one end wall of the aluminum melting furnace body in a spaced manner, and the smoke backflow pipe and the smoke pipe are communicated to enable part of high temperature smoke in the smoke pipe to flow back to the auxiliary burning gun for burning supporting.

Description

technical field [0001] The invention relates to a kiln equipment, in particular to an aluminum melting furnace. Background technique [0002] Aluminum melting furnace is a common kiln equipment with high combustion temperature and large fuel consumption. Generally, the flue gas temperature at the flue gas outlet of an aluminum melting furnace usually reaches about 1000-1100 degrees Celsius. If such high-temperature flue gas is directly discharged into the environment, it will not only cause a huge waste of energy, but also cause pollution and damage to the environment. [0003] Therefore, those skilled in the art have been devoting themselves to the renovation of aluminum melting furnaces, expecting to further improve the utilization efficiency of fuel, and rationally utilize the discharged high-temperature flue gas, so as to reduce the waste of waste heat of high-temperature flue gas. For example, high-temperature flue gas is introduced into the air heat exchanger to prehe...

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Problems solved by technology

[0007] The technologies disclosed in the above three patents / patent applications utilize the high-temperature flue gas discharged from the aluminum melting furnace, or use the waste heat of the flue gas to heat the combustion-supporting air in the heat exchanger, or use the waste heat of the flue gas as a fuel for the combustion of the aluminum melting furnace. However, there are still shortcomings or deficiencies in the above-mentioned technology, for example: (1), the utilization method of the waste heat of the flue gas discharged from the aluminum melting furnace is single, and it is only used for the heating of the aluminum melting furnace itself or the preheated air, and the heat of the flue gas The utilization efficiency is low, the best heat utilization effect is not achieved, and the power loss is large; (2), only the waste heat of the exhausted flue gas is used, and the flue gas is not re-combusted, and the flue gas discharged to the environment still has A large number of combustible substances and harmful components, of which the energy of combustible substances has not been fully utilized, and the direct entry of harmful components into the atmosphere will also have an impact on the environment, which is not conducive to energy saving and emission reduction; With proper agitation and preheating, the aluminum material heats up slowly and is heated unevenly, and some areas are not heated sufficiently, which affects the speed at which the aluminum material is converted into aluminum liquid and the fluidity of the produced aluminum liquid, the thermal efficiency is low, and the work progress is slow; ( 4) The aluminum melting furnace is not equipped with auxiliary flue gas emission equipment, the furnace pressure in the aluminum melting furnace is high, the work is unstable, and there are certain safety hazards

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