Exhaust-heating boiler and furnace body thereof

Abstract

The invention discloses a body of waste heat boiler, comprising a transition section flue which comprises an ascending part and a descending part, wherein, the top end of the ascending part is connected with the top end of the descending part, and a convection section flue, wherein, a smoke inlet of the convection flue is connected with the lower end of the descending part of the transition section flue and a smoke outlet forms at the smoke discharging end of the convection section flue. According to the boiler body of the invention, since the transition section flue is arranged, high temperature flue gas containing dust enters into the ascending part of the transition section flue from a melting furnace and the dust contained in the high temperature flue gas can fall by depending on gravity during ascending process, thus the dust is not easy to stick on inner wall of the boiler body and accumulated dust is light in the boiler body, thus reducing dust removal operation, improving service life of the boiler body, prolonging operation time of the high temperature flue gas in the boiler body and improving recycling efficiency of the waste heat.

Description

technical field [0001] The invention relates to a waste heat boiler and its furnace body, in particular to a waste heat boiler and its furnace body used for smelting furnaces. Background technique [0002] Waste heat boilers are equipment used to recover heat. For example, in the field of nonferrous metallurgy, waste heat boilers are widely used to recover the heat in the flue gas of smelting furnaces. [0003] In the prior art, the furnace body of the waste heat boiler is generally composed of a single parallelepiped or column, and the furnace body forms a furnace. [0004] The Chinese utility model patent CN2354093Y discloses a waste heat boiler. The furnace body of the waste heat boiler is a parallelepiped, and a steam drum is arranged on the furnace body. The flue gas enters from one side of the furnace body and exits from the opposite side. [0005] In the prior art including the waste heat boiler mentioned above, high-temperature flue gas enters from one side of the ...

AI Technical Summary

Problems solved by technology

The dust (such as slag) contained in the high-temperature flue gas is very easy to stick to the inner wall of the furnace body. Therefore, the furnace needs to be cleaned frequently. For the dust deposited on the inner wall of the furnace, the cleaning operation is time-consuming and laborious.

Moreover, due to dust sticking to the inner wall of the furnace body, the life of the furnace body is reduced, and the waste heat recovery efficiency is reduced

In addition, the flue gas tends to flow directly from the smoke inlet to the smoke outlet, so that the residence time in the furnace is short and the heat recovery efficiency is low

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