A double radiant section ethylene cracking furnace

Abstract

The invention provides a dual-radiation-section ethylene cracking furnace and belongs to the field of petrochemical industry. The ethylene cracking furnace comprises two parallel symmetric radiation sections, wherein a shared convection section is arranged between the radiation sections; multiple sections of convection coil pipes for heat exchange with flue gas are arranged in the convection section; a transitional flue region is arranged between the radiation sections and the convection section; arc-shaped structures are arranged at the upper part and the bottom of the flue gas flow channel of the transitional flue region; the transitional flue region is defined by the waists of the upper arc-shaped structure, the waists of the bottom arc-shaped structure and a connecting line of the tops of the two arc-shaped structures; the adjacent edges in the transitional flue region are connected in a circular arc transition manner, the boundary surface of flow fields on two sides is relatively clear, and the transition is relatively natural. According to the ethylene cracking furnace, the phenomena of eddy current and bias current can be avoided during normal running on the two sides, and high-temperature flue gas from the radiation sections on two sides is mixed as little as possible during normal running on one side and burnout on the other side, thereby avoiding the damage to equipment and prolonging the running cycle of the furnace.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to an ethylene cracking furnace with double radiation sections, which is suitable for producing ethylene by steam cracking of petroleum hydrocarbons. Background technique [0002] Ethylene technology is the leading technology of petrochemical industry, and its technical level is regarded as an important symbol to measure the development level of a country's petrochemical industry. Since the mid-1990s, the scale-up of the world's ethylene plants has been accelerating. As the core equipment of ethylene plant, the development of cracking furnace technology plays a pivotal role in the continuous progress of ethylene technology. With the expansion of the scale of the ethylene plant, it is necessary to require a large-scale cracking furnace to adapt and match. [0003] In addition to the traditional means of improving the processing capacity of the cracking furnace in t...

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