Pulverized coal combustion heating furnace

Abstract

The invention provides a pulverized coal combustion and warming furnace. The pulverized coal combustion and warming furnace comprises a main furnace shell, a pulverized coal combustor, a combustion region, a primary mixing region, a secondary mixing region, a waste flue gas inlet and a dried flue gas outlet, wherein the main furnace shell is provided with an inner cavity; the pulverized coal combustor is arranged on the main furnace shell; the combustion region is arranged in the inner cavity of the main furnace shell and is connected with the pulverized coal combustor; the primary mixing region is arranged in the inner cavity of the main furnace shell and is connected with the combustion region; the combustion region is arranged between the pulverized coal combustor and the primary mixing region; the secondary mixing region is arranged outside the main furnace shell and is communicated with the primary mixing region; the waste flue gas inlet is formed in the main furnace shell and is connected with the primary mixing region; and the dried flue gas outlet is formed outside the main furnace shell and is communicated with the secondary mixing region. The pulverized coal combustion and warming furnace has the technical advantages that pulverized coal is sufficiently combusted, flue gas is uniformly mixed in the furnace, the content of oxygen of the flue gas at the outlet is low, slag can be automatically discharged, the heat efficiency of a furnace body is high, the heat loss is relatively small and the like.

Description

technical field [0001] The invention relates to a pulverized coal combustion heating furnace. Background technique [0002] At present, most of the drying equipment in the coal injection workshop adopts the heating furnace that burns blast furnace gas. It mainly uses the high-temperature flue gas generated by burning blast furnace gas to mix with waste flue gas to form a drying medium. The temperature of the drying medium is mainly controlled by mixing the waste flue gas into the The amount of gas or the combustion amount of heating furnace gas is adjusted, and the drying medium entering the mill should be controlled within 250-350 °C. With the development of the market, there are some enterprises where there is no gas fuel such as blast furnace gas in the area where the pulverizing workshop is located. Insufficient fuel, etc. [0003] In summary, there are the following problems in the prior art: in the absence of blast furnace gas, enterprises cannot obtain the dry flue ...

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Problems solved by technology

[0004] The invention provides a pulverized coal combustion heating furnace to solve the problem that enterprises cannot obtain dry flue gas required for normal production in the absence of blast furnace gas

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