Heating and coking treatment of tubular furnace

Time：2022-09-30

The heating of tubular furnace is because it uses gas and air to form a high temperature flame, so that the furnace and partition wall can be heated and the gas itself can be heated to a very high temperature. On the one hand, the furnace tube is directly radiated by high temperature gas and flame. In the radiation chamber, the furnace tube is mainly subject to high heat radiation, and the tar in the tube can be heated to 400 ℃, so it is suitable for two-stage heating. There are 70 furnace tubes in the convection chamber. Because they are moistened by gas, they mainly conduct heat. The tar in the tubes can only be heated to 130 ℃, so they are suitable for two-stage heating and dehydration.

The most common and simplest way to deal with coking in tubular furnace is air steam coke burning method; It is found that the furnace tube is coking (under the condition that the processing amount and tar moisture and property have not changed, the heating of the tubular furnace is increased by the pressure of the furnace inlet, i.e. the secondary pump). It is clarified that the furnace tube may be coking, and the air steam coke burning method can be used for coke burning; The air steam coke burning method is based on the premise that the furnace tube is not blocked, air and steam are introduced into the furnace inlet in proportion, and the furnace is heated to a certain temperature with gas. The coke and air reverberation (burning) in the furnace tube are finally completely removed.

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